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Latent series capacitor compensation device

A technology of series capacitors and compensation devices, applied in reactive power compensation, reactive power adjustment/elimination/compensation and other directions, can solve the problem that series capacitor banks are not allowed to bypass etc.

Active Publication Date: 2015-06-10
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When an out-of-zone fault occurs, series capacitor banks are generally not allowed to be bypassed

Method used

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  • Latent series capacitor compensation device
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Examples

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Embodiment 1

[0080] Such as Figure 1-5 As shown, the inventive submersible series capacitor compensation device of this example includes a capacitor bank C, an overvoltage protection device, a damping device D and a bypass circuit breaker BP; The overvoltage protection device and the bypass circuit breaker are connected in parallel BP; the capacitor bank C and the damping device D are respectively connected to the transmission line through the mode switching devices Q1 and Q2;

[0081] The overvoltage protection device is single gap, double gap, metal oxide voltage limiter MOV, thyristor valve and metal oxide voltage limiter MOV parallel combination, or gap and metal oxide voltage limiter MOV parallel combination; application It is necessary to select a suitable overvoltage protection device according to the transmission capacity of the line where the series compensation is located and the stability level of the system.

[0082] The device is used alone in the power system as a conventio...

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PUM

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Abstract

The invention relates to a latent series capacitor compensation device. The latent series capacitor compensation device comprises a capacitor bank, an overvoltage protection device, a damping device and a bypass circuit breaker. The capacitor bank and the damping device are serially connected and then parallelly connected with the voltage protection device and the bypass circuit breaker; the capacitor bank and the damping device are connected with a power transmission line through a mode switching device Q1 and a mode switching device Q2 respectively; the latent series capacitor compensation device can be independently used as a conventional series compensation device or a latent series compensation device in a power system, or two or more latent series capacitor compensation devices can be used cooperatively. The latent series capacitor compensation device integrates functions of conventional series compensation and latent series compensation and can be used no matter the line is in normal operation or in fault.

Description

Technical field: [0001] The invention relates to a compensation device for series capacitors, more particularly to a compensation device for submerged series capacitors. Background technique: [0002] In the prior art, conventional series capacitor compensation devices are generally used in EHV and UHV transmission lines to compensate part of the inductive impedance of AC transmission lines, so as to reduce line impedance, increase transmission capacity, and improve system stability. . The series compensation technology is one of the important means to economically and efficiently improve the transmission capacity of transmission lines, and has been widely used in power systems around the world. [0003] According to the fixed or adjustable compensation impedance value, series compensation devices can be divided into fixed series compensation (FSC) and controllable series compensation (TCSC). The controllable series compensation realizes the dynamic control of the series e...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 吴倩戴朝波王轩宿剑飞
Owner STATE GRID CORP OF CHINA
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