Low-voltage distribution area dispersion reactive compensation method based on wireless network

Abstract

The invention relates to a low-voltage distribution area dispersion reactive compensation method based on a wireless network. A dispersing compensation device is arranged at each branch line tail end of a distribution output line of a 10 KV power grid after passing through a substation or each load concentrated area line. The dispersing compensation devices monitor voltages of corresponding branch line tail ends in real time and send data obtained through detection to a micro processor. The micro processor processes the obtained data and sends control signals, and capacitors are switched to balance circuit voltages. The dispersing compensation devices are networking with a regulation and control commanding center in a wireless connection mode through a wireless network communication module to exchange information. The regulation and control commanding center regulates and controls the dispersing compensation devices at the plurality of branch line tail ends in real time. The method is suitable for dispersing reactive compensation of the 10 KV distribution area, improves capacitor switching rate, prolongs the service life of the capacitors, reduces low-voltage line loss, overcomes the defects in low-voltage power grid concentrated compensation, increases low-voltage power grid tail end voltage and improves low-voltage power grid device use rate.

Description

technical field [0001] The invention belongs to the field of electric power system automation and relates to low-voltage power distribution, in particular to a wireless network-based decentralized reactive power compensation method for low-voltage distribution stations. Background technique [0002] At present, the reactive power compensation method is generally adopted in rural comprehensive distribution stations, that is, reactive power compensation devices are installed near the transformer for centralized compensation. In practice, the centralized compensation method invented in practice has the following disadvantages: 1. The voltage at the output port of the transformer Higher, the capacitor bank with centralized compensation will sometimes be cut off automatically due to overvoltage protection, resulting in the inability to compensate the power factor of the low-voltage grid; The lifting effect of the low-voltage power grid is poor, and it cannot effectively reduce th...

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Problems solved by technology

[0002] At present, the reactive power compensation method is generally adopted in rural comprehensive distribution stations, that is, reactive power compensation devices are installed near the transformer for centralized compensation. In practice, the centralized compensation method invented in practice has the following disadvantages: 1. The voltage at the output port of the transformer Higher, the capacitor bank with centralized compensation will sometimes be cut off automatically due to overvoltage protection, resulting in the inability to compensate the power factor of the low-voltage grid; The lifting effect of the low-voltage power grid is poor, and it cannot effectively reduce the load current of the low-voltage power grid, so it has a poor effect on reducing the low-voltage line loss; 3. The cost of the centralized compensation device is high

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