This paper takes Northeast Agricultural University as an example to discuss the application of campus energy consumption supervision system.
Second, the status quo of campus energy consumption supervision and the importance of establishing an energy consumption supervision system 1. Distribution of energy consumption in college buildings. At present, most of China's colleges and universities have adopted manual management modes for electricity, water and gas. There are many shortcomings in manual meter reading. Such as data accuracy is not high, poor real-time, poor continuity and so on. The hydropower management department cannot grasp the changes of hydropower data and energy consumption load in various regions of the university in real time, so it is impossible to make feasible adjustments in time and formulate corresponding management systems.
There are many types of buildings and functional divisions in colleges and universities. Mainly composed of the following areas, a variety of energy consumption coexist in each area, the consumption of electricity and water energy is distributed in each area, and the gas distribution area is relatively single and the living area is the main one.
(1) The measurement point coverage is not comprehensive: the electricity metering of Northeast Agricultural University covers only the power distribution room and the total building of the building, and there is no measurement of the electricity consumption. According to the water metering, the total inlet pipe is based on the municipal water metering. The second-level water metering point has only a small number of water meters, which cannot reflect the energy consumption of the whole school. It is necessary to gradually improve the measurement points to help schools objectively and accurately grasp the status of their own energy resources consumption, to achieve the first step of refined management, and to provide basic information for the development of effective energy conservation and resource conservation measures.
(2) The lack of real-time monitoring of the energy-using system: The power distribution room is the power center in the campus. Currently, only the electricity meter is used to measure the electricity. The operation equipment still relies on manual inspection, which is far from meeting the requirements of safe operation. When there is a running fault, equipment aging, etc., fault isolation cannot be performed in time so that the power outage range does not expand. There is no monitoring or guarantee of power quality for important energy-using departments such as laboratories. It is necessary to establish a real-time monitoring to ensure the safe operation of the energy system. At the same time, the heating system of the North University also needs to operate the safety monitoring, which can increase the intelligent control, control the heat through the opening and closing of the electric regulating valve, and use the energy reasonably.
(3) Measurement statistics rely on labor: all kinds of energy consumption statistics of the whole school rely on labor, and the complicated work of statistical work is relatively simple. The accuracy of data is greatly influenced by human factors, and a large number of paper reports are difficult to save and transfer. Need to enrich data analysis methods, and improve accuracy and timeliness, while reducing manual statistical workload.
III. Application of Campus Energy Consumption Supervision System in Northeast Agricultural University 3.1 Project Introduction Northeast Agricultural University was founded in Harbin in 1948. It was originally called Northeast Agricultural College and was the first general higher agricultural college founded by the Communist Party of China in the Liberated Area. In September 2009, Ankerui Electric Co., Ltd. undertook the design and construction of the energy management system of Northeast Agricultural University. It realizes remote monitoring of high voltage, low voltage incoming line, capacitor compensation, liaison and outgoing circuit in the distribution room. The Acrel-5000 energy management system reserves an expansion interface for easy expansion.
The Acrel-5000 energy management system realizes the monitoring of campus energy consumption of Northeast Agricultural University. The field equipment is concentrated in the same power distribution room. The electrical duty room of the owner is arranged next to the power distribution room. The monitoring center of the system is also placed. In the duty room. The system networking adopts a common three-layer structure, that is, the station management layer, the network communication layer, and the field device layer.
3.2 Networking Structure Networking Diagram
The network communication layer is composed of a communication server, an interface converter, and a bus network. This layer is a bridge for data information exchange.
The station management layer is for the management of the distribution network, which is directly facing the user. This layer is also the uppermost part of the system, mainly composed of energy management system software and necessary hardware equipment such as computers, printers, UPS, etc.
3.3 Reference standard
The upper computer software adopts the Acrelâ€“5000 building energy consumption analysis management system, and completes the software monitoring and management functions of the upper computer through software configuration, database variable configuration and interface design.
2 Real-time monitoring system of energy consumption data The collection station periodically collects the instrument parameters of each monitoring point and uploads it to the local building energy consumption analysis management system database. The user can query the energy consumption monitoring situation in real time.
3 Building classification energy consumption analysis system automatically classifies building energy consumption, namely: power consumption, water consumption, gas consumption (natural gas quantity or gas volume), central heating consumption, central cooling and cooling consumption, other energy Application quantity (such as concentrated hot water supply, coal, oil, renewable energy, etc.) 4 The same amount and energy ratio analysis of the energy consumption of the building or the area of â€‹â€‹the building, the daily consumption and the annual consumption, with a graph, a histogram It is displayed in different ways and supports report output.
5 Building energy-saving auxiliary diagnosis system can extract the energy consumption data for the same and the ring comparative analysis, establish the benchmark value and determine the energy consumption level of each monitoring point, and propose a complete diagnostic process for energy consumption improvement, and Give an energy analysis report.
IV. Summary Through the construction of the energy supervision system, the construction process of the conservation-oriented campus has been deepened, and the decentralized control and centralized management mechanism has been established, which has greatly improved the management efficiency and management quality. At the same time, it has also established the energy publicity mechanism of the campus and promoted the same The assessment management of the units is effective in reducing and limiting the unreasonable consumption of energy and helping to achieve continuous energy conservation. The campus is a fully functional social form, which requires a large amount of logistics management. Traditional management methods are often inefficient and difficult to achieve. To improve management energy conservation and strengthen the management of various types of energy consumption, we must rely on modern technology. The campus energy consumption monitoring system is the basis and basis for implementing various energy-saving measures. Through energy consumption monitoring and intelligent control, the school's energy consumption analysis, cost accounting, energy saving detection and energy consumption publicity/assessment can be realized, and remote automatic/manual energy adjustment can be carried out in accordance with the management mode. Acrel-5000 building energy consumption analysis management system is the main component of energy conservation management of Northeast Agricultural University, and plays an important role in the construction of economical campus in Northeast Agricultural University.
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