基于电流故障分量变化特征的三端柔性直流配电网线路保护方法

高淑萍; 左俊杰; 宋国兵; 沈渠旺; 李元泽

doi:10.19912/j.0254-0096.tynxb.2022-0538

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (8) : 139-148. DOI: 10.19912/j.0254-0096.tynxb.2022-0538

基于电流故障分量变化特征的三端柔性直流配电网线路保护方法

高淑萍¹, 左俊杰¹, 宋国兵², 沈渠旺¹, 李元泽¹

作者信息 +

LINE PROTECTION METHOD FOR THREE TERMINAL FLEXIBLE DC DISTRIBUTION NETWORK BASED ON VARIATION CHARACTERISTICS OF CURRENT FAULT COMPONENTS

Gao Shuping¹, Zuo Junjie¹, Song Guobing², Shen Quwang¹, Li Yuanze¹

Author information +

文章历史 +

摘要

通过利用模块化多电平换流器（MMC）和输入串联输出并联-双有源桥DC/DC变换器（ISOP-DAB）所构成的等效电路在发生不同故障时电流回路的差异分析故障特征,并结合理论数据分析进行验证,提出利用双端线路电流故障分量绝对值变化特征来判断区内外故障以及故障选极的保护方法。最后在PSCAD/EMTDC上建立含有分布式能源的三端柔性直流配电网模型用以输出故障数据,利用Matlab实现保护算法,验证所提保护方案的可行性。

Abstract

This paper analyzes the fault characteristics by using the difference of current loop when different faults occur in the equivalent circuit composed of modular multilevel converter（MMC） converter and input series output parallel-dual active bridge（ISOP-DAB） converter, and verifies it with theoretical data analysis. A protection method using the absolute value change characteristics of current fault components of double ended lines to judge the internal and external faults and fault pole selection is proposed. Finally, a three terminal flexible DC distribution network model with distributed energy is established on PSCAD/EMTDC to output fault data. The protection algorithm is implemented using Matlab to verify the feasibility of the proposed protection scheme.

导出引用

高淑萍, 左俊杰, 宋国兵, 沈渠旺, 李元泽. 基于电流故障分量变化特征的三端柔性直流配电网线路保护方法[J]. 太阳能学报. 2023, 44(8): 139-148 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0538

Gao Shuping, Zuo Junjie, Song Guobing, Shen Quwang, Li Yuanze. LINE PROTECTION METHOD FOR THREE TERMINAL FLEXIBLE DC DISTRIBUTION NETWORK BASED ON VARIATION CHARACTERISTICS OF CURRENT FAULT COMPONENTS[J]. Acta Energiae Solaris Sinica. 2023, 44(8): 139-148 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0538

中图分类号： TM77

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