摘要
通过研究故障前后电流相位的变化,提出一种改进的故障方向保护识别算法,该算法仅需故障后的电流相位信息即可确定故障方向,进而实现故障区域定位。由于该故障识别算法仅利用电流相位信息,可避免由于DGs接入而需在配电网中大量使用功率方向元件,可极大提高配电网可靠性运行的经济性。对原有保护算法在某些特定情况下的误判进行修正,增加不对称故障适应性论证,最后通过实时数字仿真器RTDS对本故障识别算法进行验证。
By studying the change of current phase before and after the fault,a new fault direction protection identification algorithm is proposed and improved. The algorithm can determine the fault direction only by the current phase information after the fault,and then realize the fault area localization. By current phase information,the fault identification algorithm can avoid the use of power directional components in the distribution network due to DGs access,and greatly improve the economical reliability of the distribution network. It corrects the misjudgment of the original protection algorithm under certain specific conditions,increase the asymmetric fault adaptability argument. Finally,the fault identification algorithm is verified by real-time digital simulator RTDS.
作者
郭晓龙
秦文萍
韩肖清
王鹏
王成
Guo Xiaolong;Qin Wenping;Han Xiaoqing;Wang Peng;Wang Cheng(Shanxi Key Laboratory of Power System Operation&Control,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第3期133-139,共7页
Acta Energiae Solaris Sinica
基金
山西省重点研发计划重点项目(201603D112001)
国家自然科学基金(U1610121)
山西省回国留学人员科研资助项目(2015-重点1)。
关键词
方向保护
功率方向元件
DGS
配电网
不对称故障
RTDS
direction protection
power direction components
DGs
distribution system
asymmetric fault
RTDS
