A New Type of Zero-Sequence Directional Relay Based on Model Recognition for Parallel Lines

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A New Type of Zero-Sequence Directional Relay Based on Model Recognition for Parallel Lines

更新时间：2025-07-09

- A New Type of Zero-Sequence Directional Relay Based on Model Recognition for Parallel Lines
- Vol. 44, Issue 2, Pages: 102-107(2010)
- 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：
  CLC： TM77
- Online First：10 February 2010，
  
  Published：2010
- 稿件说明：
移动端阅览
A New Type of Zero-Sequence Directional Relay Based on Model Recognition for Parallel Lines[J]. 2010, 44(2): 102-107.
DOI：

A New Type of Zero-Sequence Directional Relay Based on Model Recognition for Parallel Lines[J]. 2010, 44(2): 102-107. DOI：

摘要

分析指出

平行线路区内故障时的零序电源可等效为一个位于区内的电压源

零序电路符合电感模型

线路区外故障时的零序电源则可等效为一区内电压源和一区外电压源的叠加

零序电路不再满足电感模型.所以区内故障时

电感模型误差很小

区外故障时

电感模型误差很大.通过计算模型误差

结合传统的零序方向元件

提出了一种基于模型识别的平行线路零序方向元件的新原理

能够有效防止区外故障时的保护误动

当本线内部故障时

保护的灵敏度随动作时间自适应提高

可以快速动作切除故障.理论分析和EMTP仿真实验表明

新原理利用全部故障暂态信息

在时域中计算而无需滤波

区内故障时保护动作灵敏

区外故障时保护则快速闭锁

可靠性很高.

Abstract

The mal-operation of pilot zero-sequence direction protection working on parallel lines is usually caused by the zero-sequence mutual inductance.By analyzing zero-sequence network of parallel lines

an inductance circuit model is established for the internal fault

and a novel zero-sequence directional relay based on model recognition is proposed for parallel lines. When the internal fault occurs

the model error is small and decreases quickly

and when the external fault occurs

the model error is large and oscillates.By computing the model error

the performance of the conventional zero-sequence directional relay is improved. The theoretic analysis demonstrates the validation of the new relay.

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Keywords

references

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Related Author

索南加乐 1

宋国兵 1

加玛力汗 3

邵文权 1

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何世恩 1

Related Institution

Electrical Engineering Department, Xi'an Polytechnic University

西安交通大学电力设备电气绝缘国家重点实验室

State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University

Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology

Shaanxi Key Laboratory of Smart Grid, Xi'an Jiaotong University

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