Power distribution network reactive power optimization compensation method based on rapid and reliable communication

Abstract

The invention discloses a power distribution network reactive power optimization compensation method based on rapid and reliable communication and belongs to the field of power system automation. According to the power distribution network reactive power optimization compensation method based on rapid and reliable communication, a master station part and a reactive power compensation part used for transmitting the operation state and data to the master station part are involved, the master station part comprises a system scheduling platform, a marketing system and a production management system which are associated with one another, the reactive power compensation part comprises a device-following compensation device and an in-place compensation device, internal networking is achieved by means of the in-place compensation device through small wireless communication, so that a stagger network is formed, all in-place compensation operation states and data in the area of the platform are transmitted to the device-following compensation device, the device-following compensation device transmits the operation sates and the data to the system scheduling platform through the GPRS, and thus remote transmission and management of monitoring information and data relevant to reactive power compensation are achieved for a user. According to the power distribution network reactive power optimization compensation method based on rapid and reliable communication, unified-platform management of a reactive power compensation device is achieved through wireless networking, flowing reactive currents of a system are reduced, line loss is reduced, the voltage of the system is stabilized, low voltage at the tail end is increased, the power quality is improved, and the active transmission capacity of a line is improved.

Description

technical field [0001] The invention belongs to the field of electric power system automation, relates to low-voltage power grid distribution, in particular to a reactive power optimization compensation method for distribution network based on fast and reliable communication. Background technique [0002] In recent years, with the continuous development of modern industry and power industry, the distance and capacity of power transmission are increasing day by day, and industrial users have higher and higher requirements for power quality. Since the power supply line from the distribution station area to the user is generally relatively long, Especially in areas with a large power supply radius, the 380V power supply line can reach nearly one kilometer, and the low-voltage distribution network has the problem of long-distance transmission of reactive power and large reactive power loss. Therefore, no matter from improving the transmission capacity of the transmission network ...

AI Technical Summary

Problems solved by technology

[0003] At present, the reactive power compensation of the power grid in my country is mainly concentrated in the high and medium voltage distribution network, while the compensation of the low voltage distribution network is less, so that the line loss of the low voltage distribution network is much larger than that of the high and medium voltage distribution network, which reduces the power grid. Economical operation and voltage quality

However, in some rural comprehensive distribution stations, reactive power compensation is adopted, that is, reactive power compensation devices are installed near the transformer for centralized compensation. The load current of the power grid has a poor effect on reducing low-voltage line losses

[0004] In order to solve the defects of centralized compensation, the applicant disclosed a wireless network-based decentralized reactive power compensation method for low-voltage distribution stations in the Chinese utility model patent with the application date of June 17, 2013 and the application number 201310237892.2. Method A distributed compensation device is installed at the ends of multiple sub-lines of the 10 kV power grid through the substation distribution output line or the lines in the load concentration area; the decentralized compensation device monitors the voltage at the end of the corresponding sub-line in real time and transmits the detected data to the Microprocessor; the microprocessor sends the control signal after processing the acquired data, and switches the capacitor to balance the circuit voltage; the decentralized compensation device transmits information through the wireless network communication module to the network of the control and command center to control and command The center regulates the decentralized compensation devices at the ends of multiple sub-lines in real time; however, this method is still not ideal for improving power quality and reducing low-voltage line losses

Images