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A svg switching method for line voltage compensation

A line voltage compensation and voltage sampling technology, applied in reactive power compensation, AC network voltage adjustment and other directions, can solve the problems of large start-up inrush current, small inductance value of connected reactor, threat to equipment safety, etc., to reduce the impact and maintain voltage. stable effect

Active Publication Date: 2016-02-17
CHENGDU AISHUO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the start-up process of the low-voltage SVG, since the inductance value of the reactor connected between the inverter side and the grid side is small, and the DC side has a large capacitance, if the SVG is started directly without control, a large start-up inrush current will be generated. The electrical and mechanical shocks caused by the start-up surge current will lead to start-up failure and even threaten the safety of equipment

Method used

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  • A svg switching method for line voltage compensation
  • A svg switching method for line voltage compensation
  • A svg switching method for line voltage compensation

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Embodiment Construction

[0034] figure 1 It is a block diagram according to the present invention. In order to achieve the above purpose, the present invention provides an SVG switching method for line voltage compensation. The system includes a central control module 6, a soft start module 5, a main contactor 12, three Phase bridge inverter circuit 4 , inverter circuit controller 7 , capacitor bank 3 , first voltage sampling module 8 , first current sampling module 9 , second current acquisition module 10 and second voltage acquisition module 11 .

[0035] The first voltage sampling module 9 is used to collect the voltage information of multiple points of the power supply line of the distribution network in real time, for example, collect the voltage information at the connection points of multiple loads 1-n, and average the voltage information. The first current sampling module 10 is used to collect voltage information of multiple points of the power supply line of the distribution network in real t...

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Abstract

The invention relates to an SVG switching method for line voltage compensation. According to the method, in the switching process, impact on a power grid can be reduced in an impact-free soft start mode; in addition, the fluctuation condition of idle work and voltages of loads can be detected immediately, adaptive switching operation is conducted, and voltage stabilization of a power distribution network is maintained.

Description

technical field [0001] The invention relates to an SVG switching method for line voltage compensation. Background technique [0002] my country's current urban and rural 10kV distribution network system has problems such as large power supply radius, large seasonal load changes, large line reactive power loss, low power factor, and reactive power cannot be balanced locally. The existence of linear, impact and fluctuating loads has brought increasingly serious power quality problems to the power grid, seriously affecting the voltage stability of the power grid, and threatening the normal operation of the power system and user equipment. Solving these problems will achieve obvious practical effects in terms of energy saving and loss reduction, improvement of power supply quality of distribution network and economic benefits of power supply enterprises. [0003] In order to compensate reactive power and keep the line voltage of distribution network stable, reactive power compen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/30
Inventor 曾茂良谢俊和罗建
Owner CHENGDU AISHUO TECH CO LTD