Integrated monitoring of intelligent distribution station building

1. Preface

The distribution station building is the core terminal node of the distribution network and an important link in ensuring the reliability and quality of power supply for low-voltage users. Due to the dispersed and widespread distribution of distribution stations in the region, regular manual inspections of distribution stations require a huge amount of maintenance work, resulting in low maintenance efficiency and manual maintenance costs. With the increasing demand for unmanned inspections of distribution stations, smart station buildings have been promoted and applied, effectively improving maintenance efficiency and significantly reducing the intensity of on-site manual inspections. This project aims to achieve the intelligent transformation of traditional distribution stations by installing various IoT intelligent sensors and devices. It has intelligent functions such as abnormal operation alarm and potential fault analysis, which improve the inspection efficiency of distribution stations and promote the reliability of distribution network power supply.

At the same time, with the help of existing power Internet of Things related technologies, by deploying primary and secondary fusion devices and intelligent fusion terminals with edge computing functions, it can intelligently perceive and identify distribution network operating conditions, equipment status, environmental conditions and other auxiliary information. And according to production and management needs, upload necessary data to the platform layer. Through the collaborative processing of data between the platform layer and edge nodes, combined with technologies such as big data and artificial intelligence, precise monitoring of the operation status of the distribution network is achieved, and online analysis and deep mining of the data are carried out to achieve comprehensive and full scene panoramic perception of the operation status of the distribution network.

IINormative reference documents

The following documents are essential for the application of this document. For all referenced documents with dates, only the version with dates is applicable to this document. For any reference document without a date, its version (including all modified versions) applies to this document.

GB/T 2423.1 Environmental testing for electrical and electronic products - Part 2: Test methods - Test A: Low temperature

GB/T 2423.2 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods - Test B: High Temperature

GB/T 2423.3 Environmental Testing for Electrical and Electronic Products - Part 2: Test Methods - Test C: Constant Temperature Damp Heat Method

GB/T13729 Remote Terminal Equipment

GB/T 17626.4 Electromagnetic compatibility testing and measurement techniques - Electrical fast transient burst immunity test

GB/T 17626.9 Electromagnetic Compatibility Testing and Measurement Techniques - Pulse Magnetic Field Immunity Test

GB/T 15153.1 Remote Control Equipment and Systems - Power Supply and Electromagnetic Compatibility

DL/T 634.5 101 Remote Control Equipment and Systems Part 5-101: Transmission Protocol Basic Remote Control Task Supporting Standards

DL/T 634.5 104 Remote Control Equipment and Systems Part 5-104: Transmission Protocol IEC 60870-5-101 Network Access Using Standard Transmission Protocol Set

DL/T 721 Remote Terminal of Distribution Network Automation System

IEC61850-6 (DL/T860.6) Power Automation Communication Networks and Systems Part 6: Substation Communication Configuration Description Language Related to Intelligent Electronic Devices

IEC61850-7 (DL/T860.7) Power Automation Communication Networks and Systems Part 7: Basic Information Communication Structure

IEC61850-8 (DL/T860.8) Power Automation Communication Networks and Systems Part 8: Specific Communication Service Mapping

IEC61850-10 (DL/T860.10) Substation Communication Networks and Systems Part 10: Consistency Testing

Q/GDW 1517 Grid Video Surveillance System and Interface SIP-B

YD/T 2576.2 TD-LTE Digital Cellular Mobile Communication Network Terminal Equipment Testing Method (Phase I) Part 2 Wireless RF Performance Testing

ISO/IEC PRF 20922 MQTT (Message Queuing Telemetry Transport Protocol)

MODBUS RTU Communication Protocol

Q/GDW Transmission and Transformation Equipment IoT Node Equipment Wireless Networking Protocol

Q/GDW Transmission and Transformation Equipment IoT Micropower Wireless Network Communication Protocol

Q/GDW Transmission and Transformation Equipment IoT Sensor Data Specification

3、 Overall requirements for auxiliary monitoring scheme of distribution station buildingAnd overall idea
The overall architecture of the system consists of various parts such as the auxiliary monitoring platform of the provincial/municipal company's distribution station building, the data exchange and transmission system, and the station end intelligent monitoring system, which realize data exchange and linkage of the system through the network.

The auxiliary monitoring platform of the distribution station serves as the "brain" of the entire system, responsible for storing, processing, analyzing, and issuing instructions to terminals regarding the environment and equipment status information of the distribution station. It is also a work platform for operation and maintenance personnel, which realizes remote monitoring, danger warning, and abnormal alarm of the overall operation status of the distribution station building.

The data exchange transmission system is the "neural network" of the entire systemConnect various application platforms, intelligent distribution gateways, sensor devices, etc. to achieve real-time data transmission, and display it to relevant authorized users on the auxiliary monitoring platform of the distribution station building.

The intelligent distribution gateway is the 'sensory system' of the entire systemResponsible for storing, processing, and analyzing information of various functional sub modules in the distribution station building, and transmitting it to the auxiliary monitoring platform of the distribution station building through standard protocols. When the preset limit is exceeded, the intelligent distribution gateway linkage is activated to control the relevant indicators and parameters of the distribution station within the target range.

Sensor devices are the 'hands and feet' of the entire systemRealize the collection of monitoring information inside the distribution station building.

Based on the actual situation of the construction and implementation of information network and distribution station terminal equipment in the province, with the help of IoT platform and visualization platform deployed uniformly in the information intranet, the storage of collected data such as environment and status, and the storage of video information are respectively realized; The auxiliary monitoring platform of the distribution station obtains relevant data information from the IoT platform and the visualization platform respectively for analysis and processing, and displays the analysis result information.

System Logic Structure Diagram

Real time data and video information from the distribution station are transmitted to the IoT platform and visualization platform through edge layer devices. The monitoring system application platform centrally deployed by the provincial company obtains data from the IoT platform and visualization platform, enabling real-time viewing and historical data retrieval of monitoring data for distribution stations throughout the province. The monitoring system application platform is deployed in the provincial company for centralized monitoring.

(1) Architecture Description

Station monitoring system: The station monitoring system collects and uploads real-time data within the station through the integration of terminals and intelligent distribution gateway devices. The intelligent distribution gateway device receives station environment data information from the dynamic environment host, as well as monitoring data such as equipment status, security information, and video monitoring. The distribution intelligent gateway transmits the monitoring data to the intelligent distribution gateway via Ethernet and uploads it to the IoT platform via 4G (APN); At the same time, the intelligent power distribution gateway uploads video surveillance information to the visualization platform through 4G (APN). In places without integrated terminals such as switch stations, data from the station end is collected by intelligent distribution gateways and uploaded to the IoT platform and visualization platform respectively.

The robot inspection system is interconnected with the robot platform through 4G (APN).

(2) Data interaction scheme:

lEdge interaction scheme

a) Stock station building

For the installed inventory sensors, wired connection is used to connect them to the dynamic ring host,IEC61850Communication protocol.

b) New station building

The sensor is directly connected to the gateway through wired or wireless means, and the problem of weak 2.4G long-distance transmission signals can be solved by installing aggregation nodes.

lEdge Cloud Interaction Solution

Edge cloud interaction includes interactions between intelligent gateways and IoT platforms, intelligent gateways and visualization platforms, and integrated terminals and IoT platforms. The communication method adopts wireless public/private network and fiber optic communication.

4、 Supply List of Auxiliary Monitoring Equipment for Standard Distribution Station Buildings

According to the importance of different types of distribution stations, the intelligent distribution station building system configuration can be divided into basic configuration, standard configuration, and power protection configuration schemes; Suitable for distribution stations with different characteristics and demands in different regions.

The basic configuration scheme principles are as follows:

5、 Solution for Auxiliary Monitoring System of Distribution Station Building

Option 1: Wireless standard screen cabinet type (using LoRa based wireless communication to meet the communication protocol of IoT low-power wireless network for power transmission and transformation equipment)

Main functions/features:

1. Standardized monitoring cabinet, atmospheric, and in compliance with on-site standard configuration

2. Equipped with wireless public network/wireless private network remote communication interface, supporting 2G/3G/4G/5G

3. Equipped with LoRa wireless communication interface, 470MHz communication protocol meets the power equipment node networking protocol, 2.4GHz communication protocol meets the low-power consumption protocol

4. Supports protocols such as DL/T 634.5 104, IEC61850, MQTT, GB28181, Q/GDW 1517.1-2014 Power Grid Video Surveillance System and Interface (SIP-B), etc

5. Can realize the environment, equipment status, and security of the open/close station/open/close station、Comprehensive monitoring of fire protection, video, etc

Option 2: Wireless standard cabinet type (with all the functions of option 1, but lighter in size, suitable for renovation projects with limited space)

Main functions/features:

1. Standard cabinets are suitable for intelligent new construction or renovation projects in switch stations, especially for limited space renovation projects. They have high integration, compact size, external 7-inch or 10 inch touch screens, simple and atmospheric design, and provide a good experience

2. Equipped with wireless public network/wireless private network remote communication interface, supporting 2G/3G/4G/5G

2. Equipped with LoRa wireless communication interface, 470MHz communication protocol meets the power equipment node networking protocol, 2.4GHz communication protocol meets the low-power consumption protocol

3. Supports protocols such as DL/T 634.5 104, IEC61850, MQTT, GB28181, Q/GDW 1517.1-2014 Power Grid Video Surveillance System and Interface (SIP-B), etc

VIStation building intelligent assistance and artificial intelligence visualization gateway, as well as wireless IoT sensors

6.1 Station building intelligent assistance and artificial intelligence visualization gateway

The intelligent assistance and artificial intelligence visualization gateway of the station building is the monitoring system of the distribution station building“Sensory system”It is a smart IoT system“Cloud tube edge end”The edge equipment of the architecture has the functions of information collection, Internet of Things agent and edge computing to support business, power distribution and emerging businesses. Adopting hardware platformization, functional software, modular structure, software hardware decoupling, and communication protocol adaptation design, it meets the needs of high-performance concurrency, large capacity storage, multiple collection objects, and artificial intelligence analysis. Implement functions such as data and video collection, storage, analysis, encryption, reporting, equipment protocol adaptation, and self checking analysis for power distribution stations.

6.2 Wireless Data Aggregation Node

According to the actual communication transmission requirements of the distribution station building, wireless aggregation nodes are selected to solve the problem of weak signals in some areas and the gateway being unable to receive sensor data.

● Working power supply:

Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● Structural requirements:

Install using screws or buckles.

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements:

a)Equipped with LoRa wireless communication hardware interface;

b)Service life: ≥ 5 years.

● Communication requirements:

a)Communication method: Wireless communication in the 470MHz frequency band based on LoRa is adopted to meet the wireless networking protocol of IoT node devices for power transmission and transformation equipment. We use LoRa based 2.4GHz wireless communication to meet the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment, and use LoRa based 470MHz wireless communication to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment;

b)Wireless transmission distance: greater than 50 meters.

6.3 Wireless temperature and humidity sensor

● working power supply

According to the buyer's request, choose one of the following power supply methods.

a) Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b) Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a) Temperature detection range: -40 ℃ to 85 ℃;

b) Humidity detection range: 0-99.9% RH;

c) Temperature accuracy: ± 0.5 ℃;

d）湿度精度： ±3%RH；

e) It should have local display and button setting parameter functions;

f）使用年限：≥5年。

● Communication requirements

a) Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b) Wireless transmission distance: greater than 50 meters;

c) Data upload frequency: Factory configured once/15 minutes, can be flexibly configured according to the buyer's requirements, with a configurable range of once/minute to once/60 minutes.

6.4 Wireless water immersion sensor

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a)Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b)Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

Requirements for structural protection level: The data collector shall not be lower than IP40, and the sensor collector shall not be lower than IP67. Install using screws or buckles.

● Technical parameter requirements

a)Sensitivity: With 4 gear settings, 0k Ω～ 5k Ω, 0k Ω～ 100k Ω, 0M Ω～ 1M Ω, 0M Ω～ 5M Ω;

b)Service life: ≥ 5 years.

● Communication requirements

a)Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c)Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes.

6.5 Wireless water level sensor

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a)Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b)Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

Requirements for structural protection level: The data collector shall not be lower than IP40, and the sensor collector shall not be lower than IP67. Install using screws or buckles.

● Technical parameter requirements

a)Water level detection range: 0m～3m；

b)Water level accuracy: 0.5% FS;

a)Service life: ≥ 5 years.

● communication

a)Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c)Data upload frequency: Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes.

6.6 SF6 gas monitoring sensor

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a) Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b) Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)SF6 gas measurement range: 0-5000 μ V/V (ppm) better than 5 μ V/V;

b)SF6 gas detection sensitivity: 5 μ V/V (ppm);

c)Oxygen range: 0-25%

d)Oxygen accuracy: ± 1%;

e)Oxygen sensitivity: 0.1%;

f)Service life: ≥ 5 years.

● Communication requirements

a)Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c)Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes. The upload threshold in the sensor can be set, and when the threshold is exceeded, the transmission frequency becomes once/minute.

6.7 Wireless ozone sensor

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a)Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b)Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)O3 measurement range: 0-20ppm;

b)O3 accuracy:<± 0.1ppm (25 ℃);

c)Service life: ≥ 5 years.

● Communication requirements

a)Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c)Data upload frequency: Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes.

6.8 Wireless Smoke Sensor

● working power supply

According to the buyer's requirements, choose one of the following power supply methods. If conditions permit, prioritize using AC220V power supply:

a)Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b)Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)Protection area: 60 ㎡ to 100 ㎡, specific parameters should be based onGB50116-2013 "Design Specification for Automatic Fire Alarm System"To be accurate;

b)Alarm volume:>80dB；

c)Execution standard: GB20517-2006 "Independent Smoke and Fire Detection Alarm";

d)Service life: ≥ 5 years.

● Communication requirements

a)Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c) Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes. The upload threshold in the sensor can be set. When the threshold is exceeded, the transmission frequency becomes once/1 minute.

6.9 Lighting, fan, air conditioning, dehumidification linkage device

● working power supply

Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)State input voltage: DC12V/DC24V;

b)Control output node capacity: AC/DC220V, ≥ 8A, supports 2-channel independent node output capability.

c)Service life: ≥ 5 years;

d)Fan AC contactor outlet voltage: AC380V, output capacity ≥ 30A

● Communication requirements

a)Communication method: Adopting LoRa based 470MHz frequency band wireless communication to meet the wireless networking protocol of IoT node devices for power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c) Acceptable gateway control information for linkage operation.

6.10 smart door lock

● working power supply

a)The intelligent lock body is powered by batteries or DC12V, with priority given to DC12 power supply;

b)The wireless communication part adopts DC12V.

c)It is advisable to obtain power from the DC screen to ensure the normal operation of the smart lock.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)Execution standards: GB21556-2008 "General Technical Conditions for Lock Safety", JG/T394-2012 "General Technical Requirements for Building Intelligent Door Locks";

b)Should have authorization password unlocking and remote unlocking functions;

c)Service life: ≥ 10 years (excluding door lock battery).

● Communication requirements

a)Communication method: Adopting LoRa based 470MHz frequency band wireless communication to meet the wireless networking protocol of IoT node devices for power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

a)Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes. Real time updates of door lock status and door opening and closing records are sent, and control information is executed in real-time in conjunction with the gateway, with a delay of no more than 5 seconds.

6.11 Battery monitoring

● working power supply

Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)Overall voltage monitoring range:DC0V～220V；

b)Single cell voltage monitoring range:DC2V～24V；

c)Individual voltage accuracy:1.00%；

d)Current monitoring range:0～1000A；

e)Current monitoring accuracy:1%；

f)Environmental temperature monitoring:0～100℃；

g)Accuracy of environmental temperature monitoring:1.5℃；

h)Internal resistance measurement range:0.1mΩ～100mΩ；

i)Consistency of internal resistance measurement:1.5% μ Ohm;

j)Service life: ≥ 5 years.

● Communication requirements

a)Communication method: Adopting LoRa based 470MHz frequency band wireless communication to meet the wireless networking protocol of IoT node devices for power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

a)Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes.

6.12 Transformer Noise Sensor

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a)Powered by batteries, with a capacity of no less than 1200mAh, and capable of working normally for more than 5 years at a frequency of 1 cycle/15 minutes;

b)Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)Measurement frequency range:20Hz～12.5kHz；

b)Noise measurement range: 30dB~120dB;

c)Response time: ≤ 3s;

d)Service life: ≥ 5 years.

● Communication requirements

a)Communication method: Adopting wireless communication in the 2.4GHz frequency band based on LoRa, meeting the communication protocol for low-power wireless networks in the Internet of Things for power transmission and transformation equipment. Alternatively, wireless communication in the 470MHz frequency band based on LoRa can be used to meet the wireless networking protocol for IoT node devices in power transmission and transformation equipment.

b)Wireless transmission distance: greater than 50 meters;

c)Data upload frequency: Factory configured once/15 minutes, configurable range from once/minute to once/60 minutes.

6.13 Ultra high frequency partial discharge sensor

● working power supply

Using AC/DC220V power supply, allowable deviation is -20% to+20%.

● structural requirements

The structural protection level should meet the IP40 protection level requirements and be installed using screws or buckles.

● Technical parameter requirements

a)Detection frequency band: 300MHz to 2000MHz (500MHz-1500MHz);

b)System sensitivity: ≤ 17.6dBV/m;

c)Dynamic range: ≥ 60dB;

d)System measurement range: -80 to -20 dBm;

e)Error value: ± 2dBm;

f)Rated power: ≤ 35w;

g)Service life: ≥ 5 years.

h)IP rating: not lower than IP40.

● Communication requirements

a)Communication method: Supports both wireless and wired communication methods. Wireless communication adopts LoRa based 470MHz frequency band wireless communication, which meets the wireless networking protocol of IoT node devices for power transmission and transformation equipment. Wired communication transmission adopts Modbus protocol.

b)Transmission distance: greater than 50 meters;

c)Data submission content and frequency: The content is collected in standard format once an hour for 1 second each time.

6.14 Spherical camera

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a)Adopting AC220V power supply, allowable deviation -20% to+20%.

b)Powered by POE.

● structural requirements

The structural protection level should meet the requirements of IP66 protection level and be installed with screws.

● Technical parameter requirements

a)Pixel count: 2 million;

b)Frame rate: 25fps;

c)Video compression standard: H.264/H.265/MJPEG;

d)Adjustment angle: Horizontal 0-360 °, Vertical 0-75 °

e)Infrared irradiation distance: 20 meters.

● Communication requirements

a)Communication interface: wired Ethernet communication;

b)Interface protocol: ONVIF, GB28181.

6.15 Gun shaped camera

● working power supply

According to the buyer's requirements, choose one of the following power supply methods:

a)Adopting AC220V power supply, allowable deviation -20% to+15%.

b)Powered by POE.

● structural requirements

The structural protection level should meet the requirements of IP66 protection level and be installed with screws.

● Technical parameter requirements

a)Pixel count: 2 million;

b)Frame rate: 25fps;

c)Video compression standard: H.264/H.265/MJPEG;

d)Infrared irradiation distance: 10 meters.

● Communication requirements

a)Communication interface: wired Ethernet communication;

b)Interface protocol: ONVIF, GB28181.

6.16 NVR

● working power supply

Adopting AC220V power supply, allowable deviation -20% to+15%.

● structural requirements

Device structure size: 19 inch standard chassis rack mounted installation.

● Technical parameter requirements

a)Network video input: no less than 8 cameras connected

b)Should support POE interface: 8 channels, output power: ≤ 200W;

c)Video decoding format: H.265/H.264;

d)Video resolution: including but not limited to 4MP/3MP/1080p/720p/D1.

e)Hard disk interface: 1 SATA, not less than 2TB hard disk;

f)Data storage requirements: Support storing video data at D1 resolution for no less than 2 months.

g)Acceptable network shutdown control information to achieve linkage control of cameras.

● Communication requirements

a)Communication interface: wired Ethernet communication;

b)Interface protocol: ONVIF, GB28181 and NTP.

7、 Introduction to System Performance
7.1 Power consumption

a)Sensor overall power consumption: ≤ 2W;

b)Controller overall power consumption: ≤ 20W;

c)Camera power consumption: ≤ 15W;

d)Power consumption of gateway machine: ≤ 50W;

e)NVR overall power consumption: ≤ 250W;

f)Wireless device wireless transmission power: ≤ 17dBm.

7.2 Insulation performance

Follow the relevant provisions of GB/T 13729.

a)Insulation resistance ≥ 20M Ω.

b)Dielectric strength power supply>60V: 2kV to ground for each circuit; power supply ≤ 60V: 0.5kV to ground for each circuit;

c)Impulse voltage power supply>60V: 5kV to ground for each circuit; power supply ≤ 60V: 1kV to ground for each circuit.

7.3 Damp heat test

Follow the relevant provisions of GB/T 13729.

The temperature is 40 ℃, the relative humidity is 93%, and the test period is 2 days (48 hours). Two hours before the end of the test, an insulation resistance test shall be conducted in the test box. The insulation resistance value between each conductive circuit and the exposed non charged conductive parts and the shell shall not be less than 1.5M Ω.

7.4 Environmental adaptability

high-temperature performance

The equipment underwent a high-temperature experiment (severity level: temperature+70 ℃, duration of 2 hours), and during and after the experiment, the communication and operation of the device were normal.

low-temperature performance

The equipment underwent a high-temperature experiment (severity level: temperature -20 ℃, duration 2 hours), and during and after the experiment, the communication and operation of the device were normal.

7.5 Electromagnetic compatibility

Voltage dip and interruption:

The equipment shall undergo voltage sag and short-time interruption immunity tests in accordance with the provisions and methods of GB/T 15153.1 (power surge: 30%, duration 1000ms, 60%; Duration 1000ms; 100%, duration 500ms. The experimental point is the power supply of the convergence device. Under interference, the communication and operation of the convergence device are normal

Electrostatic discharge immunity:

The equipment shall undergo electrostatic discharge test (severity level: Level 3; test points are the parts of the entire device that can be touched by the human body) in accordance with the provisions and methods of GB/T 15153.1, including air discharge and contact discharge/indirect discharge. Under interference, the device shall communicate and operate normally.

Electrical fast transient burst immunity:

The equipment shall undergo electrical fast transient burst immunity test (severity level: Level 3; test points are the power supply and communication ports of the convergence device) in accordance with the provisions and methods of GB/T 17626.4 and GB/T 15153.1. Under the condition of interference, the convergence device shall communicate and operate normally.

Damping vibration blocking magnetic field immunity:

The equipment shall undergo damping vibration blocking magnetic field immunity test (severity level: level 4) in accordance with the provisions and methods of GB/T 15153.1. Under the condition of interference, the communication and operation of the device shall be normal.

Radio frequency electromagnetic field radiation immunity:

The equipment shall undergo a radio frequency electromagnetic field radiation test (severity level: 3) in accordance with the provisions and methods of GB/T 15153.1. Under the condition of interference, the device shall communicate and operate normally.

Surge (impact) immunity:

The equipment shall undergo a surge (impact) immunity test in accordance with the provisions and methods of GB/T 15153.1 (severity level: Level 3; test points are the power supply and communication ports of the convergence device). Under interference, the device shall communicate and operate normally.

Power frequency magnetic field immunity:

The equipment shall undergo a power frequency magnetic field immunity test (severity level: 4) in accordance with the provisions and methods of GB/T 15153.1. Under the condition of interference, the communication and operation of the device shall be normal.

Damping oscillation magnetic field immunity:

The equipment shall undergo damping oscillation magnetic field immunity test (severity level: level 4) in accordance with the provisions and methods of GB/T 15153.1. Under the condition of interference, the communication and operation of the device shall be normal.

Voltage dip and interruption:

The equipment shall undergo voltage sag and short-time interruption immunity tests in accordance with the provisions and methods of GB/T 15153.1 (power surge: 30%, duration 1000ms, 60%; Duration 1000ms; 100%, duration 500ms. The experimental point is the power supply of the convergence device. Under interference, the communication and operation of the convergence device are normal.

7.6 Transmission power and transmission signal quality

The maximum output power of the gateway device UE is 23dBm ± 2.7dB, and the maximum power backoff and transmission signal quality meet the requirements of YD/T2576.2 standard.

7.7 Off spectrum radiation

The additional spectrum radiation mask of the device meets the standard template requirements and occupies a bandwidth lower than the specified channel bandwidth.

7.8 Mechanical Vibration Performance

Equipment vibration frequency range: 2Hz-9Hz, displacement amplitude: 7mm; frequency range: 9Hz-200Hz, acceleration amplitude: 20m/s ²; Frequency range 200Hz~500Hz, acceleration amplitude: 15m/s ²; Each sweep cycle time: 6 minutes; Number of frequency sweep cycles in each axis direction: 10 times. During and after the experiment, the device's communication and operation were normal.

7.9 Stability of Continuous Power Supply

After the equipment is debugged, it shall be tested at least before leaving the factory72 hour continuous and stable power on test, with AC voltage at rated value, equipmentAll functions and performance indicators meet the relevant requirements.

7.10 Gateway timing

a)It should have NTP timing function and can also synchronize with the main station through messages.

b)The accuracy error of punctuality should be less than 2.0 seconds/24 hours.

7.11 Reliability

Average working time of the equipment itself（MTBF) not less than20000h。

8、 Safety protection requirements

Follow the security protection requirements of the Internet Department of the provincial company.

8.1 Safety protection principles

Special use should be adoptedSIMCard, dedicated channel (public)The wireless public network APN or wireless 4G private network of the company should be based on the principle of "minimizing"Principally configure various security policies for the internal network mobile access area, meet the network security management requirements of the provincial company, and access the information management area.

8.2 Security Protection Strategy

a) Wireless public network or the wireless private network built by the provincial company should be utilized, using dedicated SIM cards, dedicated encrypted channels, and a unified management platform to enter the provincial company's management information area through the internal network mobile access area;

b) Terminals that do not have cellular communication capabilities or encryption media should be accessed through the station gateway, and lightweight authentication measures such as address binding and login password authentication should be used for security protection between the terminal and the station gateway;

c) The station gateway should be able to support the installation of a unified edge framework, equipped with TF cards or other hardware encryption media certified by State Grid, and a secure encryption transmission channel recognized by the provincial company to achieve terminal identity authentication and transmission data encryption;

d) Application layer identity authentication should be implemented between the application apps deployed in the station gateway and the main station application services to ensure the security of app access.

8.3 Security Access Requirements

a) Prevent external personnel from controlling related terminals or launching network attacks through management and debugging interfaces through physical security protection;

b) Support remote security upgrade function, verify received application software, firmware, vulnerability patches, etc;

c) Ensure ontology security through system reinforcement, trusted computing, and other technologies;

d) The video access control signaling should use encryption algorithms recognized by State Grid Corporation of China to achieve encrypted control signaling and unencrypted data transmission. The protocol layer should support GB/T28181-2016 protocol or State Grid B interface protocol.

9、 Introduction to System Functions
9.1environmental monitoring

Realize the monitoring of the operating environment of equipment in the distribution station building, such as the collection and display of data information on temperature, humidity, SF6 gas concentration, oxygen content, ozone concentration, smoke concentration, water level or immersion information, and spatial noise in the station building; Simultaneously generate alarm information based on the set alarm threshold.

Implement a linkage scheme based on environmental indicators to control and manage equipment such as air conditioning, fans, and water pumps, and issue control instructions to intelligently adjust the operating environment of the power distribution station building.

9.2 Security Monitoring

Realize real-time monitoring of the status of security equipment in the distribution station building, while monitoring the intrusion of illegal personnel. Display the status in the monitoring system and generate alarm information in case of illegal intrusion.

9.3 Online monitoring of equipment

Realize the collection and display of information on power equipment in the distribution station, including operating noise of distribution transformers, temperature of connection pile heads, temperature of cable connection pile heads in medium voltage switchgear, partial discharge of medium voltage switchgear, condensation status in medium voltage switchgear, etc., and generate alarm information according to the set threshold.

Based on the basic ledger information of the equipment, achieve online evaluation of the equipment's operating status and display the evaluation results of the equipment's operating status.

9.4 Video Surveillance

Implement monitoring of the operation status inside the distribution station building, while also monitoring the operation status of the main equipment. Through the video monitoring module, distribution operation and maintenance personnel can remotely view the operation status of the distribution station building, and can verify the accuracy of alarm information through video monitoring equipment to make reasonable maintenance plans in a timely manner.

9.5 Linkage Control

According to the specific requirements of the distribution station building, the gateway machine includes but is not limited to the following linkage functions:

a)Temperature and humidity monitoring and air conditioning (fan) linkage;

b)Water immersion/level monitoring and pump linkage;

c)The fan (self starting) is linked to the concentration of harmful gases;

d)Smoke and power supply, video linkage;

e)Access control and infrared deployment/removal, lighting, and fan linkage;

f)Video is linked with security and environmental monitoring.