1, system overview
In order to improve the current management level of China's power grid automation, and can easily and efficiently grasp the operation of the power grid and equipment, and for the current distribution of China's distribution network equipment, a wide range of distribution, distribution and many other practical characteristics, rely on traditional methods and means Establishing a communication channel with high timeliness, reliability, and low investment makes it difficult to form a network. For this purpose, our company specially developed PQC300 power distribution load measurement and control terminal and DUT100 multi-function GPRS communication terminal or CUT2000/SUT2000 high-speed data transmission radio station network, together with full-featured PQC300 power distribution load monitoring main control software, DSC communication front-end machine The software forms the PQC300 distribution load monitoring system. The system is based on industrial networks and computer networks, and achieves seamless dual-network connectivity. It provides the most convenient, most reliable, and most economical means of communication transmission to solve the public data, special transformation, and farmer’s field data collection and transmission services, and solves the difficulties of large-scale data acquisition network systems, high cost, poor reliability, and complex construction. Bottleneck problem.
PQC300 power distribution load monitoring system is the most effective management and production tool for current and future power system breakthroughs in geographical areas, network domains and space-time constraints; it is the best solution for optimal power distribution network control and information management for power distribution equipment. . The system can realize the real-time comprehensive monitoring of the operation of the distribution equipment, solve the problem of the power distribution equipment operating conditions that are concerned by the power supply department, and provide the most basic information for calculating the reliability of power supply and the quality of power supply. The transformation and equipment expansion provide a reliable guarantee.
Through the operation of this system, the operational status of the distribution network will be mastered at all times, providing data basis for improving the quality of power services, improving the level of power management and decision-making, and improving economic performance.
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2, system characteristics(1) The system communication channel is stable and reliable
PQC300 wireless cellular radio networking system uses 230MHz wireless frequency band as a data communication channel, PQC300 monitoring terminal, CUT2000/SUT2000 high-speed data transmission radio (230MHz), Nport De-211 serial communication server to form a dedicated wireless cellular network. Because it is a dedicated wireless frequency point of the national power company, the channel is stable and reliable, and there is no need to set up a line.
PQC300__GPRS mode networking system uses GPRS data communication channel to establish a virtual private network (VPN) between PQC300 monitoring terminal, GPRS base station, GPRS switch room, and power supply company. In order to ensure the stability and reliability of the channel, the mobile equipment room and power company The computer room is directly connected with fiber optic cables. All data is encrypted and transmitted to ensure that any data is not tampered with, and the initial investment and routine maintenance costs are low.
(2) powerful data acquisition
PQC300 monitoring terminal is equipped with CUT2000/SUT2000 high-speed digital radio station (230MHz) or GPRS communication module in the all-electronic distribution load monitoring terminal, making it a smart terminal device with distribution transformer monitoring, user metering, load monitoring and other functions. . The PQC300 monitoring terminal passed the standard test of the National Institute of Automation Automation Research Center and passed the central laboratory and field comparison test. The fault analysis and recording and real-time alarm functions provide the basis for the fault analysis of the power grid; the analysis of distribution overload capacity of the distribution transformer provides a reliable basis for expansion and capacity expansion of the power company.
(3) The system is open and versatile
In the design of the system, the system considers the master station as a data warehouse sharing mode for data collection, analysis, and forwarding. System development follows the principles of openness and versatility. The first is the use of standard acquisition databases (IBM DB2, ORACLE, SQL SERVER, and other large databases). It is suitable for terminals of different manufacturers to access the network; Different types of terminal data. Through the data sharing with the MIS system, dispatch automation, distribution automation system, and geographic information system, the acquired distribution transformer information is reutilized. The third is to conduct Web publishing, which can achieve timely and convenient query analysis.
(4) Full-featured application software to ensure the advancedness and practicality of the system
PQC300 monitors the data transmitted from the terminal. After the processing and processing of the networked programming technology, the developed application software meets the automatic load analysis, automatic meter reading, automatic alarm of equipment failure, harmonic analysis of the power grid, voltage qualification rate, and power supply reliability. Statistic analysis of power factor, reactive power compensation and statistical analysis of compensation effect management.
(5) Simple and convenient and quick implementation of system engineering and post-maintenance
PQC300 real-time monitoring system of power distribution load Because the use of wireless cellular radio station or GPRS communication module networking equipment, so no field wiring, engineering construction is very simple, the project cycle is greatly shortened. In the later stages of the project, there will be no problems such as line aging, line interruption caused by other artificial or non-human factors, and other problems encountered by conventional wired network. Therefore, the post-project management is also particularly convenient and reliable.
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3, system networkingDepending on the devices that make up the industrial network, two types of networks will be formed:
A PQC300 real-time power distribution monitoring system consisting of PQC300 distribution load monitoring terminal, wireless cellular high-speed data transmission radio station (CUT2000/SUT2000 high-speed data transmission radio station), and Nport De-211 serial communication server. Figure 1 shows:
The second is the PQC300 distribution load real-time monitoring system consisting of the PQC300 power distribution load monitoring and control terminal and the industrial network and computer network composed of GPRS communication modules.