Abstract:This article introduces the energy consumption monitoring system of Wuhua Building, which uses intelligent power instruments to collect various electrical parameters at the distribution site. After the instruments are networked locally, they communicate through fieldbus and transmit to the background remotely. The Acrel-5000 building energy consumption monitoring system is used to monitor and analyze the electricity consumption of the distribution circuit.

Keywords: large public buildings; Energy consumption monitoring system; ACREL-5000;

1 Introduction

In recent years, many guidelines for building energy-saving management standards and online monitoring and management standards for energy consumption of energy consuming units have been successively introduced, and the efficiency of energy use has received increasing attention. Ankerui Energy Management Cloud Platform can provide data support for energy consumption and energy conservation in buildings and enterprises.

2 Design Basis

GB 50052 "Code for Design of Power Supply and Distribution Systems"

GB 50054 "Code for Design of Low Voltage Power Distribution"

GB/T 50063 "Design Specification for Electrical Measuring Instruments of Electric Power Equipment"

DL/T 448 "Technical Management Regulations for Electric Energy Metering Devices"

3 Project Overview

The Wuhua Building project in Dongying City covers an area of 4011.8 square meters, with a construction area of 21049 square meters. The office building has 14 floors and two underground floors.

The monitored electricity meters are distributed in a distribution room and floor distribution rooms, with a total of 157 meters. There are 67 PZ80L-E4 meters in the distribution room and 90 DTSF1352 meters in the floor distribution room. The backend is located in the duty room on the first floor. Therefore, based on the nature of this project, an energy consumption system is designed. The data of the electricity meter is directly collected through the serial port of the energy consumption gateway, and after data collection, it is analyzed according to the principle of energy consumption classification and sub item.

This project aims to address the intelligent, automated, visualized, and quantifiable collection and storage of basic energy consumption data; Establish an energy management platform and achieve centralized management of energy; In depth analysis of energy consumption processes and trends; Establish an energy consumption monitoring and disclosure platform. Through the unified comprehensive management of electric energy media, the energy usage of equipment in various regions can be queried and analyzed, helping management personnel discover potential energy-saving opportunities, improve energy utilization efficiency, scientifically manage energy use, thereby reducing energy usage costs and playing a role in establishing a conservation oriented society.

4 System Architecture

The Acrel-5000 building energy consumption analysis and management system from Ankerui uses workstation hosts, communication equipment, and measurement and control units as basic tools, providing a basic platform for real-time data collection and remote management of large public buildings. It can forward data with other building automation systems to form a complex monitoring system. The energy consumption system mainly adopts a hierarchical distributed computer network structure, as shown in the system architecture diagram:

System Architecture Diagram

5 System software modules

Comprehensive energy consumption main interface

Daily electricity consumption curve

Reflecting the energy consumption of various categories of buildings in the current year and the comprehensive energy consumption converted to standard coal, and calculating the energy consumption per unit area;

The main energy consumption measured by the meter is electricity consumption, and the daily hourly energy consumption curve of electricity is displayed at the bottom of the interface; Click on the upper area of each category's energy consumption to jump to the energy analysis main interface for that category's energy consumption;

Buildings can be switched through the dropdown menu, and building images can be replaced according to project requirements;

Classification energy consumption main interface

Reflecting the energy consumption of a certain category (such as electricity) on the same day and the same period of yesterday, the same period of the current month and the previous month, the same period of the current year and the same period of the previous year, and the comparison, growth percentage and added value;

Reflect the energy consumption trends of a certain category over the past 48 hours, 31 days, 12 months, and 3 years;

A monthly energy consumption pie chart reflecting the energy consumption of a certain sub item;

Reflect the year-on-year analysis chart of monthly energy consumption for a certain category in the current year;

Classification energy consumption branch energy consumption statistical report

Flexible selection of branches and statistics of daily, monthly, weekly, quarterly, and annual energy consumption of branches during a certain period of time;

Through the powerful pivot table function, users can perform various data statistics and combine and sort the data;

Statistical data can be displayed through various charts such as bar charts, point and line charts, stacked charts, pie charts, etc;

Statistical data can be exported to Excel;

Classification of energy consumption: Non working day energy of branch circuits

Statistically analyze the energy consumption of each branch during working days and non working days. Non working days can be flexibly set through the system

Statistical data can be exported to Excel;

Year on year analysis of classified energy consumption branches

Calculate the monthly energy consumption of each branch in the current year and the same period last year;

Classification of energy consumption, branch energy consumption, collection and reading

Query the meter readings of each branch at any two times and calculate the travel value;

Time accuracy up to minutes;

Analysis of Energy Consumption Trends for Classified Energy Branches in Different Time Periods

It is possible to query the energy consumption parameters (such as voltage, current, power, power factor, etc.) of any branch during a certain period of time. The specific parameters that can be queried are related to the installed instruments and system configuration, and cannot be queried across months;

Data is displayed in the form of charts or tables, which can be zoomed in, out, or moved through mouse operations; Can sort data (high value, low value);

Data can be exported to Excel;

Main interface of sub item energy consumption

configuration options

According to relevant technical specifications, configure the basic information of the building, such as building function, building area, air conditioning area, building address, etc. The building area and other information will be analyzed for energy consumption per unit area;

Basic information such as the type, model, and manufacturer of the instruments used in the configuration project, and the monitoring parameter information that can be provided by this type of instrument should be added. The configuration situation here affects energy consumption statistics, time-based energy consumption statistics, and parameter query functions;

Configure all measuring instruments used in the project, save the address, transformation ratio, corresponding collector, code, monitoring circuit name, and other information of the measuring instruments;

The information related to measuring instruments, proportions, and calculation methods involved in configuring sub item energy consumption statistics can be flexibly configured according to the project situation. The configuration information here will affect the functionality of the energy consumption analysis module for each classified energy consumption sub item;

Configure the corresponding measuring instruments, calculation methods, proportions, and departmental energy consumption plans for each department. After completing this configuration, the departmental energy consumption analysis function module will be activated;

Configure the measuring instruments, calculation methods, and proportion corresponding to a certain energy consuming area in the building. After completing this configuration, the regional energy consumption analysis function module will be activated

6 Outlook

Based on the analysis of the energy consumption operation effect of the Wuhua Building energy monitoring system, establish a typical energy consumption analysis model for unified analysis.

Establish a building energy consumption measurement system, monitor building energy consumption, identify energy consumption scandals, and make energy-saving renovations more targeted. At the same time, consolidate the achievements of energy-saving renovations through management measures such as measurement fees and performance evaluations.

Choose energy-saving equipment.

No matter how good the energy-saving equipment is, it cannot control waste and achieve energy-saving effects. By increasing automated energy-saving equipment, developing equipment operation strategies, reducing human intervention, and implementing centralized control, energy-saving equipment is achieving energy-saving.

Quantify the energy-saving transformation results through the same month on month analysis data provided by the energy consumption monitoring system, and demonstrate the energy-saving effect.

7 Conclusion

The total area of large public buildings is less than 4% of the total urban building area, but the total energy consumption accounts for 22% of the total urban electricity consumption in China. The annual electricity consumption per unit area of large public buildings reaches 70-300 kWh, which is 10-20 times that of ordinary residential buildings. Public buildings are energy-saving entities and points. Doing a good job in energy-saving work for Wuhua Building is of great significance in promoting energy-saving work and achieving energy-saving and emission reduction goals.