The Application of Energy Consumption Online Monitoring System in the Office Building of Jiangyin Port Group

The Application of Energy Consumption Online Monitoring System in the Office Building of Jiangyin Port Group

Tong Ning 1, Wang Xiaoming 2
(1. Jiangsu Jiangyin Port Group Co., Ltd., Jiangyin, Jiangsu 214433, China
2. Ankerui Electric Co., Ltd., Shanghai 201801)

Abstract : This paper introduces the system structure, data acquisition and function realization of the system software of the new office building energy consumption monitoring system of Jiangyin Port Group Co., Ltd. Through the analysis and processing of air-conditioning, lighting and socket power in each office, the results of analysis and processing are published through forms, pictures, etc. Through this system platform, enterprise managers can establish and improve the enterprise energy conservation management system, constrain the energy consumption of each energy-consuming unit, and improve the energy efficiency of the company's office operations.
Keywords: office energy saving; energy management; energy consumption monitoring; port; data collection
0 Introduction Energy consumption is an important and controllable part of the production cost of an enterprise. Reducing energy consumption is an important way for companies to reduce production costs. With the continuous progress of society and the continuous development of science and technology, energy-saving technologies and equipment, such as high-efficiency boiler kilns, motors and dragging equipment, waste heat and pressure utilization equipment, and energy-saving equipment, have been widely used in all aspects of the company's production processes. The energy consumption of the office management of a production-oriented enterprise (mainly power consumption) is also an important part of its energy consumption. However, because it accounts for a small proportion of the total energy consumption, it is often overlooked during the implementation of energy-saving transformation of enterprises. If an energy regulatory system is established in corporate office buildings and energy consumption is measured and classified by computer or other auxiliary means, high energy consumption points and unnecessary energy consumption can be found. On this basis, the use of energy assessment management can be strengthened. The effect of doing more with less.
This article combines the on-line monitoring system for energy consumption (electric energy) of new office buildings in Terminal 5 of Jiangyin Port Group Co., Ltd. This paper describes in detail how production companies can establish effective office management energy monitoring.
1 Distribution situation and construction objectives The new office building of Terminal 5 of Jiangyin Port Group Co., Ltd. is a three-story office building. The total power supply line of the building is introduced into the distribution box by a 0.4kV distribution loop at Terminal 5# substation. . The main distribution box is located on the first floor outside the network room, with the main switch and the main switch on each floor. Then, the power distribution mode is introduced to each office using the mixed distribution mode of radial and dry type. Each office is equipped with a separate PZ30 distribution box. To facilitate the classification of power consumption, the power supply is allocated to each office and is allocated for air conditioning and lighting sockets. As shown in Figure 1 below, the distribution of offices on the third floor of the office building is shown as follows:

Figure 1 Distribution of Offices on the Third Floor of an Office Building

The system builder and the contractor have fully discussed that the energy consumption online monitoring system should achieve the following goals:
(1) The power consumption of each office shall be measured separately according to the power consumed by the air-conditioning and lighting sockets, so as to track the energy consumption fluctuations and achieve accurate prediction of energy consumption;
(2) Aggregate statistics for each office's electricity consumption by department, and display it in various forms such as help maps and curves to realize energy consumption monitoring and avoid unreasonable energy consumption;
(3) The value of electricity benchmarks can be established to provide hints for excess electricity usage or abnormal electricity usage, to achieve standardized management of energy consumption, and to form a standardized standard for promotion;
(4) After the system is completed, the system can display the data displayed on the computer in the LAN; realize the quantitative analysis of energy consumption, flow management and refined management of energy consumption, energy-saving effect assessment, and achieve comprehensive management of energy-saving improvement measures;
2 The design of the system network structure is based on the distribution situation of the new office building and the distribution of offices. The on-line monitoring system for energy consumption adopts a hierarchical distributed structure. The system includes: station management layer, network communication layer, and field device layer. The system network structure is shown in Figure 2:

Figure 2 System Network Structure

The management and monitoring layer is the human-computer interaction window for the use and maintenance of the system, and is also the uppermost part of the system. In the construction of the energy consumption online monitoring system, a data server is configured to collect, store, and process the power consumption information of each loop. The Web server presents a friendly human-machine interface to the user through the Internet, and is set for the daily use of the system. Maintenance engineer workstations;
The communication control layer is mainly composed of a communication server, an interface conversion device, and a bus network, and is a bridge for data information exchange. In this project plan, an 8-port data collector is configured in the communication control layer. In consideration of the reliability of communication and lightning protection, configure the serial isolation device. From 1st to 3rd floor, a RS485 bus is connected on the east-west side, and a single-phase meter located at each office is connected to the serial port server. The communication bus is shielded twisted pair (RVSP2 x 0.75), and the Φ25 pipe is laid along the wall to the rooms. ;
The field device layer is mainly connected to various types of instruments used for the collection and measurement of electrical parameters in the network, and it is also a necessary basic element for constructing the distribution system. In order to establish an electricity sub-metering system, two single-phase rail-mounted energy meters are installed in the PZ30 box of each office at the time of the design of the project, and the air-conditioning power and lighting sockets of the office are measured separately. Electricity. Based on the design, there are 32 single-phase metering devices for 16 offices on the 1st floor of the office building, and 34 single-phase metering devices for 17 offices on 2 floors (including meeting rooms), and 17 offices on 3 floors (including meeting rooms). Configure 34 single-phase meters and total distribution boxes to configure 4 three-box meters.
3 system function design to achieve energy consumption online monitoring system around the system construction goals, designed the following software features:
(1) Clear measurement system structure for electricity circuits The Jiangyin Port Group office building has three floors. The energy consumption system has two power meters installed in the office building's total line, each floor, and each office. These meters are used to measure air conditioning. Electricity and lighting sockets use electricity, combined with four electricity meters, a total of 104 metering points were set up throughout the system, and an electricity metering system covering the entire office building was established. The metering system display function was established in the system software. As shown in Figure 3, the system user can understand the hierarchy of the power distribution hierarchy of the office building at a glance through this functional interface.

Fig. 3 Measurement system display

(2) Energy Management ERP
System management or maintenance personnel can also configure the name of the power branch, the type of power usage (power for air conditioning, power supply for the lighting outlet), the department to which it belongs, and the type of power meter, etc. through the power circuit maintenance function. This function allows the system to The electricity consumption of each power circuit is automatically calculated by department, and the management power consumption can be divided by department, and the ERP distribution function similar to financial ERP can be established. This function facilitates the maintenance of the system when information such as change of office department is changed. The configuration interface is shown in Figure 4;

Figure 4 Power circuit information maintenance

(3) The main interface of electricity display and energy consumption sorting system can intuitively display the monthly power consumption of the office building in the form of data and bar graphs, the electricity consumption in the previous month, the electricity consumption in the current year, the total electricity consumption in the same period of the previous year, and the current month. The daily air-conditioning power consumption combined with the trend of temperature changes, the average value of the current month's power consumption of lighting outlets, and the trend of changes in the monthly power consumption of various departments, the energy conservation office or corporate management personnel can intuitively understand the enterprise through this interface. Electricity consumption profile. As shown in Figure 5;

Figure 5 System display

(4) Energy-saving potential excavation - analysis of electricity during non-working hours The energy management system software has the function of displaying the power consumption of each circuit on a daily basis, and displays the non-working day electricity in blue columns, and then quantifies the daily consumption. The average value of the electricity line, if the daily electricity consumption is obviously higher than normal electricity consumption, the electricity consumption point can be searched and found through the power circuit of the system on a time-by-hour basis, and necessary rectification can be carried out to prevent the occurrence of abnormal power consumption. As shown in Figure 6, the daily trend of the use of electric stick diagrams and Figure 7 shows the trend of electricity consumption of a certain loop on a hourly basis;

Figure 6 loop daily electric bar graph trend

Figure 7 Analysis of the trend of electricity consumption in a certain loop

(5) Time-division energy management The energy management system can set peak, flat, and valley time periods and rates in the software according to the electricity tariff standards of the power supply bureau, and can also set working and non-working time periods according to the actual situation of the customers, through the energy consumption system. The irrational use of electricity during non-working hours of each loop can be found, and employees can develop the habit of shutting down the power-supply equipment immediately after work on the basis of rewards and punishment measures, as shown in Figure 8 Peak, Flat and Valley time consumption display;

Figure 8 Peak, level, and valley time consumption display

(6) Establishing performance assessment measures The office building is mainly used for administrative work. The system divides each office into each department according to customer requirements. The system automatically completes statistics and analysis of departmental energy consumption, and can record the number of department personnel in the system information maintenance. Information such as building area of ​​each department, and comprehensive ranking analysis based on comprehensive power consumption, per capita power consumption, and power consumption per unit area, and can record power consumption limit information for each department and office when power consumption is close to or Above the limit value, a prompt message pops up automatically, as shown in Figure 9 for the department's overall power consumption ranking;

Figure 9 Overall power consumption by sector

(7) Electricity consumption statistics report system software automatically collects and generates monthly report of electricity consumption by department. This report can be submitted to finance or automatically transferred to financial ERP system, which facilitates independent accounting of each department, as shown in figure 10 electricity consumption monthly report ;

Figure 10 Monthly report of electricity use

The energy management and evaluation unit adopted the above software functions to achieve a reasonable development of the benchmark value of each department's electricity consumption, and fed back the electricity consumption to various departments with financial data, and established an effective energy management and evaluation system. Through the construction of the system and the establishment of the system, the awareness of energy conservation of the corporate management office personnel has been greatly improved, and the energy consumption of the corporate office energy has been effectively saved.
4 Conclusion Enterprise management office energy consumption online monitoring system design is mainly based on information technology to establish a set of computer-assisted management software to meet the actual needs of the user, the system software through real-time data acquisition and automatic storage, access to the original data of the electricity process; Design and implementation, optimization and integration of data, display to friendly and intuitive human-machine interface to corporate management personnel, provide data support for the improvement of its power management model, and establish a power assessment mechanism to realize the scientific use of office electricity Management.

Source: "Automation Expo" No. 1, 2014

references:
[1] Ren Zhicheng, Zhou Zhong. Principles and Application Guide for Digital Meters for Electric Power Measurement [M]. Beijing. China Electric Power Press, 2007. 4
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About the Author:

Sun Lili, female, undergraduate, engineer of Shenyang Ankerui Power System Integration Co., Ltd., the main research direction is intelligent power monitoring and power management system, technical exchange fax mailbox:

3] Yue Ming. User-side power management system and its application[E]. Power Demand Side Management Volume 15 Issue 5