The Withstand Voltage Analysis and Same Polarity Anti-superposition Control during LV TSC Removal

ZENG Ya-bo

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The Withstand Voltage Analysis and Same Polarity Anti-superposition Control during LV TSC Removal

更新时间：2024-09-14

- The Withstand Voltage Analysis and Same Polarity Anti-superposition Control during LV TSC Removal
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 30, Issue 5, Pages: 22-25(2009)
- 作者机构：
  
  中南大学交通运输工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM761
- Published：2009，
- 稿件说明：
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[1]曾亚波.低压TSC切除时承压分析和防同极性迭加控制[J].电力电容器与无功补偿,2009,30(05):22-25.

ZENG YA-BO. The Withstand Voltage Analysis and Same Polarity Anti-superposition Control during LV TSC Removal. [J]. Power capacitor & reactive power compensation, 2009, 30(5): 22-25.
[1]曾亚波.低压TSC切除时承压分析和防同极性迭加控制[J].电力电容器与无功补偿,2009,30(05):22-25. DOI：

ZENG YA-BO. The Withstand Voltage Analysis and Same Polarity Anti-superposition Control during LV TSC Removal. [J]. Power capacitor & reactive power compensation, 2009, 30(5): 22-25. DOI：

摘要

为解决晶闸管切除电容器组时易产生过压击穿问题

根据三相电路特性分析了晶闸管切除电容器组时的工作过程。结果表明

两次换流过程可在电容器上形成同极性或异极性剩余电压迭加。同极性迭加时剩余电压高达1.366倍电网峰值电压

使先切除的晶闸管承受2.366倍电网峰值电压

而异极性迭加电容器上只有0.366倍电网峰值电压。据此得出在正序和负序连接下的TSC切除电压异极性迭加的控制算法

分析和应用都证明了控制算法的有效性。

Abstract

To solve SCR over voltage breakdown problem

this paper analyzes process of switching capacitor bank by thyristors in 3-phase power lines.The analysis results show that through two times current alternating the same polarity or reversed polarity voltage superposition on capacitor bank could be formed.If the same polarity voltage added the capacitor bank’s residual voltage up to 1.366 times of peak voltage of power network

thus will cause 2.366 times peak voltage of power network on first off thyristor.While reversed polarity voltage is added

the capacitor bank’s residual voltage is 0.366 times of peak voltage of power network.So

the reversed polarity control method of TSC switching off for positive-sequence or negative-sequence connecting is obtained.Analysis and application verify its validity.

关键词

低压TSC晶闸管投切电容器防迭加控制复合开关

Keywords

Low voltage TSCThruster switched capacitorControl of anti-superpositioncomposite switch

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