Ankerui Electric Co., Ltd., Jiading, Shanghai 201807, China;
Abstract : After the 1970s, with the development of modern industry, the global energy crisis and air pollution problems have become increasingly prominent. Traditional fuel energy is decreasing day by day, and the harm to the environment is becoming more and more serious. At the same time, there are about 2 billion people in the world. Less than normal energy supply. Solar radiant energy is an important source of energy. It is an inexhaustible, inexhaustible, non-polluting, inexpensive, energy source that humans can freely use. Photovoltaic power generation is one of the effective ways to convert solar radiation into electrical energy. As an important part of photovoltaic power generation, photovoltaic power generation monitoring system collects, stores and displays relevant power through real-time monitoring of photovoltaic power generation equipment: combiner box, inverter, environmental monitor and intelligent monitoring instrument installed in important circuit. Parameters to achieve its intelligent management. This paper gives a brief introduction to the Acrel-2000 v8.0 photovoltaic power generation monitoring system used in the Inner Mongolia Minghua project.
Key words: Shanghai Baolin Electric Photovoltaic Project Phase I; factory; photovoltaic energy consumption monitoring system; Ankerui energy consumption system; inverter;
1 Introduction
The distribution of solar energy resources is related to latitude, altitude, natural geography and climatic conditions. The total radiation and sunshine hours of Tibet, Qinghai, Xinjiang, Gansu, Ningxia and Inner Mongolia Plateau are all national, and it is one of the world's solar energy-rich regions. Photovoltaic power generation sites must have good lighting conditions and no shelter. Due to this characteristic, the area of ​​photovoltaic power generation is large. The real-time collection of parameters such as current and voltage during the normal operation of the PV system is a key to the PV system. If manual inspection is used, it takes time and effort, and the collected data has a certain time difference, which cannot objectively reflect the entire system. The overall operating state of the mode time point. Therefore, a set of intelligent background power monitoring equipment is very important.
The Encore Energy Management System is the management PV power generation monitoring system developed for the above trends. The system monitors the inverter equipment of the first phase of Shanghai Baolin Electric Photovoltaic Project in real time, monitors the power parameters of the collector during real-time monitoring of the running status of the monitoring loop, stores and analyzes it, and displays it in the form of a table or a graph. The operating status of the entire measurement system is used to find out the fault points of the system operation. In order to improve the maintenance efficiency, the user can accurately grasp the system operation status and provide accurate data support.
The first phase of Shanghai Baolin Electric Photovoltaic Project is located at No. 1515 Jincao Road, Baoshan District, Shanghai. It is invested by Shanghai Ankerui New Energy Co., Ltd., and uses the existing roof of Shanghai Baolin Electric Group to build the first phase of the 296.8kWp photovoltaic project on the A1 floor. 14 sets of 20KW string inverters are used.
Shanghai Baolin Electric Group is a modern high-tech enterprise with 15 years of research and development, manufacturing and sales of high and low voltage electrical equipment. In response to the call for national energy conservation and emission reduction, the first phase of the 291kWp photovoltaic project on the A1 floor of the existing plant roof was constructed.
Solar energy is a very clean source of energy that is not produced in the form of waste, exhaust, noise, smoke, or any pollution of water, air and the ground. Photovoltaic systems convert solar radiation into electrical energy through solar cells, which can be sent to the grid or stored in batteries to provide inexhaustible energy for humans.
2 Design basis
"Technical Specifications for Energy Efficiency Testing Systems for Public Buildings"
Code for Electrical Design of Civil Buildings (JGJ/T 16-2008)
"Intelligent Building Design Standards" GB/T50314-2006
"Code for Quality Acceptance of Intelligent Building Engineering" (GB/T50339-2003)
"Technical Guidelines for Evaluating the Reasonable Use of Electricity by Enterprises"
General Rules for the Preparation of Enterprise Energy Conservation Planning
"General Principles of Enterprise Energy Auditing Technology - GB"
GBT23331-2009 "Energy Management System Requirements"
GB-50052-2009 "Design Specification for Power Supply and Distribution System"
3. Energy consumption metering device national and industry standards
DL/T 645-1997 Multi-function Energy Meter Communication Protocol
DL/T 645-2007 Multi-function Energy Meter Communication Protocol
GB/T 19582-2008 Industrial automation network specification based on Modbus protocol
4 system architecture
The Ankerui energy management system is based on the actual situation of the first phase of the Shanghai Baolin Electric Photovoltaic Project. The overall network structure is directly connected to the collector of the fire control center using the shielded twisted pair cable, and then the data is uploaded to the server through the network. on.
The system mainly adopts a hierarchical distributed computer network structure, as shown in the system structure diagram: station management layer, network communication layer and field device layer.
The field equipment distribution of the first phase of Shanghai Baolin Electric Photovoltaic Project is as follows:
14 inverters; 1 network cabinet.
System structure diagram
5 system software module
Comprehensive energy consumption display
The Encore Energy Management System successfully entered the main page. The main page displays the building picture of the building, the basic information of the building, the electricity pie chart of the building in the month and the power generation of various energy sources. According to the selected project, load the project image, you can select the time to view the energy consumption of the project, select the building or time to automatically refresh, the default is the day.
Branch energy consumption overview
The Encore Energy Management System can query the energy usage according to the branch name of the classified energy consumption, and display the peak value of power generation on the current day and the current month (the maximum power value corresponding to the power), the power generation on the same day, the power generation in the current month, the power generation in the current year, and the power generation on the same day. Comparison of power generation during the same period of the month and power generation during the same period of last year; display the energy consumption of the past 48 hours, 31 days, 12 months, and 3 years in a histogram; display the 15 minute load energy trend in a graph (inverter display) The power curve, the flow meter shows the flow rate curve) and shows the current value, the maximum and minimum values ​​within 15 minutes.
Branch road energy
Ankerui energy management system can count the use of energy in each section of the branch day by day, week by week, month by month, quarter by season and year by year. Select the branch that needs to be queried, click 'Load Data' to view the trend of energy usage of each branch. You can query according to the existing date or custom time, and you can display the total amount of the tributary by chart display.
Sub-item energy consumption
Ankerui energy management system can perform energy consumption statistics and display according to sub-items. The daily-use analysis of the daily sub-item shows the daily and yesterday energy consumption histograms for different sub-items (blue bars indicate today, green bars indicate yesterday); energy pie charts show the energy consumption ratio of each sub-item in the past 31 days; The stacked chart shows the energy consumption trend of each item in the past 31 days; the itemized energy ranking chart shows the top 10 branches of the selected item corresponding to the energy consumption value.
Item energy
Ankerui energy management system can count the usage of each sub-item day by day, week by week, month by month, quarter by season and year by year. Select the branch that needs to be queried, and 'Load Data' to view the trend of energy usage of each branch in the sub-item, which can be queried according to the existing date or custom time. The branches here are all based on the configuration of the classification items in the basic data. The default query is the energy consumption of the current month.
Year-on-year analysis of energy consumption data
The Acrel-5000 photovoltaic energy management system can compare the power generation of each inverter with the same period last year and the previous month value to verify the power generation effect.
Chart export 
The Acrel-5000 Photovoltaic Energy Management System exports the results of the analysis, the plotted diagrams, and tables to Excel.
User Management
The user rights management of Ankerui Energy Management System adopts the hierarchical mode, which is the system administrator, logistics management personnel and equipment maintenance personnel, and automatically records the time-scale events with all operations, which can establish good anti-accident measures.
In order to enable real-time systems to operate safely and steadily, the entire system provides reliable security protection. All system operators can assign certain characteristics according to the size of the privilege. These characteristics stipulate the scope of application of each operator to the system and various activities, such as users. Name, password, operation authority and operating range.
6 Conclusion
The application of Ankerui Energy Management System in the first phase of Shanghai Baolin Electric Photovoltaic Project can realize real-time monitoring of various equipments in Inner Mongolia Minghua Photovoltaic Power Generation System, which can not only display equipment operating conditions, but also measure power generation, limit alarms, etc. Features. At the same time of system design, installation and commissioning, it is also a detailed combing of the whole power generation system. The design conforms to the system topology diagram of the site and the related software interface, which is convenient for the administrator to quickly grasp the running state of the whole system. The system also converts photovoltaic power generation into standard coal, and related parameters such as carbon dioxide emissions.
It is complete, reliable and stable, and provides accurate data basis for the management of photovoltaic power generation managers and fault tracing.
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