Online monitoring of transformer oil chromatography

Online monitoring of transformer oil chromatography

Product Overview

JC－OM100Online monitoring of transformer oil chromatographyThe multi-component principle is an online monitoring product for multi-component gases in transformer oil based on gas chromatography technology. The system can detect the content of dissolved full component gases such as H2, CO, CO2, CH4, C2H2, C2H4, C2H6 in transformer oil online according to the set cycle. The expert system can determine whether there is a latent fault, whether it is an overheating fault or a discharge fault, and give an alarm according to the set alarm value.

The device can organize and upload online monitoring information of dissolved gases in oil to the backend software according to the IEC61850 standard through the station control layer network.

The device adopts distributed control sampling technology and has self diagnosis and self recovery functions. Each functional module has weak coupling and independent functions, and adopts a rack mounted architecture for easy engineering maintenance.

Main functions

1. Capable of detecting seven or more gases and micro water contents, including H2, CO, CO2, CH4, C2H2, C2H4, C2H6, etc., in transformer oil, and able to upload spectra and other raw data for users to access;

2. Using specialized composite chromatography columns to improve the separation of gas components;

3. The system has the functions of secondary gas threshold alarm and growth rate alarm, and the alarm concentration and growth rate can be set arbitrarily;4. Using Ethernet, it can achieve full digital, remote data transmission, control, and parameter setting;

5. High scalability and easy integration with other monitoring devices;

System Principles

The JC-OM100 transformer oil dissolved gas monitoring device consists of four parts: carrier gas unit, degassing unit, column box unit, and main control unit.

Under the control of the main control unit, each unit works together to complete online monitoring and analysis of dissolved gas components in transformer oil according to the set process: the carrier gas unit can produce its own carrier gas; The degassing unit is responsible for oil and gas separation; Column box unit is used to separate gas components and generate spectrum files; The main control unit controls the overall process of oil chromatography sampling, analyzes spectrum files, calculates the concentrations of various gas components, and uses the three ratio method and David's triangle method to conduct preliminary diagnosis of transformer operating conditions. The original spectrum files, measurement data, and diagnostic results are organized according to the IEC61850 standard and uploaded to the backend software.

The main control unit can be connected to debugging software, simulate backend software functions, set device parameters, and control the chromatographic analysis process of the device.

Technical Features

uHigh detection sensitivity, with a minimum detection limit of up to C2H2 dissolved in oil0.1ppm.

uPump free vacuum degassing technology eliminates the need for a vacuum pump, improving system reliability and stability.

uOil gas separation is safe and reliable, does not pollute, and users can choose whether to discharge or not to discharge transformer oil;

uThe oil and gas separation speed is fast, taking only about 15 minutes. Special environmental adaptation technology is used to eliminate the influence of temperature and humidity changes on the gas distribution coefficient;

uCan detect H in transformer oil₂、CO、CO₂CH₄、C₂H₂、C₂H₄、C₂H₆Waiting for seven or more gases and micro water contents, and being able to upload spectra, spectra and other raw data are open to users.

uUsing specialized composite chromatography columns to improve the separation of gas components;

uAdopting imported specially designed detectors Improve the detection sensitivity of hydrocarbon gases;

uHigh stability and high-precision gas detection technology, with an error range of± 10%；

uStrong adaptability to the environment, successfully applied in high-altitude, high temperature, high humidity, and high-altitude areas;

uHigh anti-interference performance and electromagnetic compatibility meet the requirementsGB/T17626WithIEC61000Standard;

uProvide two-level alarm function, and the alarm signal can be transmitted remotely;

uOpen database that can be connected to the local area network of the power system;

uFaster analysis cycle, with a minimum monitoring period of60Minutes, can be set by users themselves, recommendedThe detection cycle isCheck every 12 hours；

uThe analyzed oil sample is treated with degassing and buffering techniques to eliminate bubbles in the oil sample injected back into the transformer body. The multi-layer isolated oil injection (return oil) technology ensures that the carrier gas will not be carried into the transformer body;

uC2H2The detection limit can reach0.1-0.5μ L/L；

uThe system has the functions of secondary gas threshold alarm and growth rate alarm, and the alarm concentration and growth rate can be set arbitrarily.

uEquipped with an expert system for identifying latent faults, the technology adopts multiple methods such as IEC60599 standard, improved fuzzy three ratio method, David triangle, cubic diagram method, etc. Users can choose freely.

uIt has the functions of querying historical data trend charts, displaying report formats, and printing, which facilitates vertical comparison and monitoring of data, thereby analyzing the operation status and fault development trend of transformers.

uSupports IEC 61850 communication standard, with optional fiber optic or twisted pair cables.

uThe system has a high degree of integration, and components can be optionally equipped with iron core grounding current and environmental temperature and humidity monitoring functions.

uAdopting dual loop multi-mode constant temperature control, the temperature control accuracy reaches± 0.1 ℃The equipment is equipped with automatic constant temperature industrial air conditioning;

uThe functional interface circuit adopts optocoupler isolation design to further improve the anti-interference performance of the system;

uUsing Ethernet, it can achieve full digital, remote data transmission, control, and parameter setting;

uHigh scalability and easy integration with other monitoring devices;

uNo steel cylinder design, no need to replace the carrier gas every year, greatly reducing the amount of after-sales maintenance, and there is no high-voltage container next to the transformer, ensuring the safety of the equipment and no safety hazards.

uThe analysis software has a user-friendly human-machine interface, a fully Chinese interface, simple operation, and rich system functions.

uThe core device standard is a 19 inch rack mounted structure, which is compact in structure, small in size, easy to maintain, and easy to assemble screens.

on-site photo