Novel Pilot Protection for Voltage Source Converter High Voltage Direct Current Transmission Lines by Identifying Model Parameters

doi:10.7652/xjtuxb201308019

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Novel Pilot Protection for Voltage Source Converter High Voltage Direct Current Transmission Lines by Identifying Model Parameters

更新时间：2025-05-08

- Novel Pilot Protection for Voltage Source Converter High Voltage Direct Current Transmission Lines by Identifying Model Parameters
- Vol. 47, Issue 8, Pages: 110-114(2013)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201308019
  CLC： TM77
- Online First：10 August 2013，
  
  Published：2013
- 稿件说明：
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Novel Pilot Protection for Voltage Source Converter High Voltage Direct Current Transmission Lines by Identifying Model Parameters[J]. 2013, 47(8): 110-114.
DOI：

Novel Pilot Protection for Voltage Source Converter High Voltage Direct Current Transmission Lines by Identifying Model Parameters[J]. 2013, 47(8): 110-114. DOI： 10.7652/xjtuxb201308019.

摘要

针对电压源换流器型直流(VSC-HVDC)输电线路主保护耐过渡电阻能力差、后备保护动作速度慢的问题

提出了一种识别模型参数的VSC-HVDC输电线路纵联保护新原理。该原理将区外故障等效为正的电容模型

区内故障等效为负的电容模型。对于电压等级为±60 kV、电缆线路长为300 km的VSC-HVDC仿真模型

发生区外故障时

识别出的线路对地电容约为80 μF; 发生区内故障时

识别出的并联电容负值约为-1 000 μF。通过判别识别出的电容值的正负

即可区分区内和区外故障。结果表明

该原理不受过渡电阻、线路分布电容和控制方式的影响

灵敏度较高

在各种工况下均能在发生故障后10 ms内准确区分区内和区外故障

具有一定的实用价值。

Abstract

To solve the problems in the existing protection for high voltage source converter high voltage direct current(VSC-HVDC)transmission lines

such as insufficient sensitivity for main protection and slow operation for backup protection

a novel pilot protection for VSC-HVDC transmission lines by identifying model parameters is proposed. In the principle

the external fault is equivalent to a positive capacitance model

while the internal fault is equivalent to a negative capacitance model. For a ±60 kV VSC-HVDC simulation model of 300 km cable lines

the identified capacitance is positive line-to-ground one

about 80 μF

when an internal fault occurs; the identified capacitance is negative shunt one

about -1 000 μF

when an external fault occurs. Internal faults and external faults can be distinguished by judging whether the identified capacitor is positive or negative. The results show that this principle

unaffected by transition resistance

line distributed capacitance and control type

can identify internal faults and external faults reliably within 10 ms under various operating conditions with sufficient sensitivity.

关键词

Keywords

references

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