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Static var compensator, voltage sag processing device and processing method thereof

A technology of static reactive power compensation and processing device, which is applied in reactive power compensation, reactive power adjustment/elimination/compensation, circuit devices, etc., and can solve problems such as increasing the cost of static reactive power compensator and multiple switching tubes.

Pending Publication Date: 2022-02-11
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure requires more switching tubes, which increases the cost of the static var compensator

Method used

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  • Static var compensator, voltage sag processing device and processing method thereof
  • Static var compensator, voltage sag processing device and processing method thereof
  • Static var compensator, voltage sag processing device and processing method thereof

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Embodiment Construction

[0060] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, and are not intended to limit the present invention.

[0061] An embodiment of the present invention provides a static var compensator.

[0062] figure 2 It is a schematic diagram of a static var compensator circuit in an embodiment, such as figure 2 As shown, the static var compensator of an embodiment includes a plurality of cascaded power sub-modules 1000:

[0063] The power sub-module 1000 includes:

[0064] H-bridge composed of four bridge switches (1 / 2 / 3 / 4);

[0065] The first inductance L1;

[0066] The second inductance L2;

[0067] One end of the supercapacitor Cs is connected to the common terminal R1 of the upper brid...

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Abstract

The invention relates to a static var compensator, a voltage sag processing device and a processing method thereof. The static var compensator can realize charging and discharging of a super capacitor by controlling an H bridge type switch, and can also realize output of alternating voltage square waves by an H bridge. The DC side can control the energy transmitted by the buck-boost converter by adjusting the duty ratio of the H bridge; the voltage output by the static reactive power compensator can be controlled by controlling the phase shift angle of each power sub-module, and harmonic waves can be eliminated to the greatest extent. The voltage sag processing device and the processing method thereof are based on the characteristics of the static var compensator, power supply switching of the alternating current bus is achieved through on-off control of the first controlled switch and the second controlled switch, the main power supply, the standby power supply or the static var compensator serves as a power supply of the alternating current bus, and it is guaranteed that power supply of the alternating current bus to the load is stable.

Description

technical field [0001] The invention relates to the technical field of high-voltage distribution networks, in particular to a static var compensator, a voltage sag processing device and a processing method thereof. Background technique [0002] The emergence of more and more high-tech industries and high value-added industries has put forward higher requirements for power quality. High-quality power parks are an effective solution to the problem of regional high-quality power supply. Once a short-circuit interruption and sag occurs on the feeder of the distribution network, it will cause significant economic losses. [0003] Based on the topology of dual-circuit power supply and the cooperative operation of various power quality management devices, a solid-state switch needs to control the switching of two thyristors to realize the switching of the main and backup power sources, thereby solving the problem of voltage drops and interruptions. However, the switching time of t...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/16H02J3/12H02J9/06
CPCH02J3/1821H02J3/1842H02J3/16H02J3/12H02J3/0073H02J9/068H02J9/062Y02E40/10Y02E40/30Y02B70/30Y04S20/20
Inventor 马智远莫文雄王勇许中栾乐周凯徐硕叶志峰伍衡张群峰熊俊肖天为
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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