Arkori Qingqing Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd., Jiangyin, Jiangsu 214405 , China Abstract: Introducing the Ankerui power monitoring system, adopting intelligent power meter to collect AM series comprehensive monitoring devices and PZ series multi-function meters distributed in 6 substations. The system adopts on-site local networking method. Fieldbus communication is transmitted remotely to the monitoring background. Through the power monitoring system, real-time monitoring and management of power parameters and power consumption of substation power distribution loops are realized. Keywords: substation; PZ series multi-function meter; AM series comprehensive monitoring and control device; SOE event; spring energy storage; power monitoring system; 0 Overview Harbin West Station, the largest station in the northeast, was built once and two times in one design. The Harbin-Hakka Passenger Line, the Harbin Intercity Railway, and the Harbin New Line were introduced into the West Field; Harbin Institute of Technology introduced the East Field and Harbin IV. line through the East Course, set to 11 hair line, passenger platform 6, West field located to the hair line 7, the passenger platform 4, a total of 18 stations 22 lines, set up two square stuff, comprehensive building area will to reach 70,000 square meters. There are modern waiting areas such as elevated waiting rooms and VIP rooms within the station. The entire station area is to the east of the industrial circuit, north and south to the center of the station as the base point, and is to be extended within 400 meters of the north and south . At the same time, Harbin West Railway Station will plan two east-west squares, mainly East Plaza, and set up public parking lots, rental parking lots, long-distance bus terminals and social parking lots. West Plaza designed bus, rental and social parking spots In October 2013 , Ankerui Electric Co., Ltd. undertook 10KV substation of Hashi Bus Terminal , 10KV East Square A Substation , 10KV East Square Substation B , 10KV East Square Substation C , 10KV East Square D substations, design and implementation of West Plaza substation 10KV distribution chamber 6 sets of six power monitoring system, the power supply system shown in FIG. 1 FIG: Figure (1) Distribution System Diagram 1 Customer needs This project is to design residential building Longbridge Street set power management system to monitor the range of high and low voltage substation site 6 AM series of integrated circuit devices and monitoring and control instruments PZ series multi-function, multi-function meter system should be adopted, communication networks And computer software, to achieve data acquisition, data calculation, power meter reading, report generation, etc., during the operation of the power distribution system, according to its actual situation, the following needs to pay special attention: 1. Collect and collect the data of AM series comprehensive measurement and control devices and PZ series multi-function instruments and display them in a system diagram interface. 2. SOE event records, real-time recording of current-breaking protection, current-limit quick-break protection, over-current protection, overload protection and other protection events can be found. 3, remote alarm alarm query function, real-time record and provide historical query function of the switching of switch position, spring energy storage, car switch working position and test position, grounding knife position and other changes. 4. Load trend curve. The load trend curve is designed for the total incoming circuit of the distribution system. It is convenient for distribution maintenance personnel to grasp the power demand and the power system load share in time, ensure the reliability of power supply, and provide protection for users' rights and interests. With this function, it is also possible to analyze the growth trend of energy demand and timely adjust demand reports. According to the needs of users, it is necessary to carry out networking and set up a power monitoring system (mainly real-time monitoring of data) on the field power distribution and distribution stations, set up a monitoring platform in the control center duty room, and monitor and count the six substations in real time. , analysis to ensure the safety, reliability and efficiency of electricity use. 2 System Structure Description The system adopts a hierarchical distributed structure for design, namely, station management layer, network communication layer and field device layer. The network diagram of the project team is as follows. The AM series integrated monitoring and control devices and PZ series of six substation high and low voltage loops are on-site. The function instrument is connected to the serial port server through RS485 field bus, and then transmitted to the site monitoring host through Ethernet to realize the data collection, storage, processing, display and upload , as shown in figure ( 2 ): Figure (2) Network topology of the power monitoring system of the 10 kV East Plaza D substation Interval equipment layer: AM series integrated measurement and control device and PZ series multi-function instrument correspond to the corresponding primary equipment dispersedly installed in the electrical cabinets of the same distribution room. These devices adopt RS485 communication interface and communicate through on-site MODBUS bus network. Realize data field collection. Network communication layer: The main function of the communication server is to collect the scattered data from the on-site collection device, and transmit it remotely to the station control layer to complete the data exchange between the field layer and the station control layer. Station control management: equipped with high-performance industrial computers, monitors, UPS power supplies, printers and other equipment. The monitoring system is installed on the computer to collect and display the operating status of the field equipment and display it to the user in the form of human-computer interaction. After the completion of the construction of the AM series of comprehensive monitoring and control devices and PZ series of multi-function instrument are used RS485 interface and MODBUS-RTU communication protocol, RS485 using shielded wire transmission , generally use two connections, the wiring is simple and convenient; communication interface is half duplex Both communication and communication can receive and send data, but can only send or receive data at the same time. The maximum data transmission rate is 10Mbps . 3 Case Studies This monitoring system is mainly to achieve Hebei Yutian Credit Union office building five substations and distribution loop real-time monitoring, analysis and management, monitoring range as shown in Table 1 below: Table 1 Monitoring point distribution table According to its modified circuit, the system can display the real-time running status of the primary circuit. The function has the power metering telemetry to mainly monitor the electrical parameters of the running equipment, including: line voltage, current, power, power factor and isoelectric parameters. See Figure (3) Figure (3) System diagram of the software The system monitors the communication status of all points on the site. The red and green color indicate that the instrument communication is abnormal and normal. It is convenient for users to check the communication status of each monitoring point, as shown in Figure 4: Figure (4) Communication State Diagram The remote alarm alarm query function provides real-time record and historical query functions for the switching of the switch opening and closing position, spring energy storage, working position and test position of the trolley switch, and the position of the grounding knife, as shown in figure (5). Figure (5) Remote Alarm Alarm Inquiry The telemetry alarm function is mainly used to indicate the specific alarm position and audible alarm for the straightforward change and main change load over-limit pop-up alarm interface to remind the on-duty personnel to deal with it in time. The load limit can be set freely under the corresponding authority. With historical query function, see Figure (6). Figure (6) Historical Telemetry Alarm Information The SOE event query function can inquire about the occurrence of protection events such as current quick-break protection, current limited-time quick-break protection, over-current protection, overload protection, ground protection, negative-sequence over-current protection, and negative-sequence over-current protection. As shown in Figure (7): Figure (7) SOE event history query Parameter reading function, the main line of all electrical parameters into the line query. Supports electrical parameter query at any time, with functions such as data export and report printing. The electrical parameters mainly include: three-phase voltage, three-phase current, active power, reactive power, frequency, and active power. As shown in Figure (8). Figure (8) Parameter reading The electricity consumption report function can select the time period to inquire, supports the accumulated electricity inquiry at any time, and has the functions of data export and report printing. Provide accurate and reliable power report for duty personnel. The names of the loops in this report are associated with the database to facilitate the user to modify the loop name. As shown in the following figure (9): Figure (9) Energy Report The load trend curve interface allows you to visually check the load operation of the loop. View real-time and historical trend curves, click the corresponding button or menu item to complete the switching of corresponding functions; help the user to enter the trend analysis and fault recall, with curve print function. Provides intuitive and convenient software support for analyzing the operating status of the entire system, see Figure (10). Graph (10) current trend graph 4 Conclusion 1) The system was commissioned on site in June 2014. It passed the user acceptance and was put into operation. The system is stable and reliable. No failures have occurred so far and it has been well received by users. 2) The successful implementation of this project shows that: The project's technical plan is scientific, reasonable and feasible. 3) The system uses centralized monitoring of high and low power distribution to achieve the desired results. The power monitoring software running interface meets user requirements and effectively reduces design and construction costs. 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