基于相量法的35kV接地变兼站用变系统单相失地运行分析

Analysis of Single Phase Grounding Lost Operation of 35kV Grounding Transformer and Station Transformer System Based on Phasor Method

以某风电场35kV接地变兼站用变系统为例,通过相量法分析系统单相失地时35kV接地变兼站用变高、低压侧相量关系,以提高现场技术人员对单相失地故障的定性认识,为接地变兼站用变的保护配置、选型等提供依据,并提出防治低压侧电压异常的建议。

Taking the 35kV grounding transformer and station transformer system of a wind farm as an example,this paper analyzes the relationship between the high voltage side and low voltage side phasors of the 35kV grounding transformer and station transformer when the system has the single phase grounding fault,so as to improve the field technicians′qualitative understanding of single phase grounding faults.It provides a basis for the protection configuration and type selection of the grounding transformer and station transformer,and puts forward suggestions for preventing and controlling voltage anomalies on the low voltage side.