风电场站用变保护电流互感器一次电流选择  

Primary Current Value Selection of Protection CT in Station Transformer of Wind Farm

作　　者：李清 LI Qing(Southwest Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Chengdu 610051,China)

机构地区：[1]中国电力工程顾问集团西南电力设计院有限公司,四川成都610051

出　　处：《电力勘测设计》2024年第2期6-10,共5页Electric Power Survey & Design

摘　　要：风电场站用变容量偏小,其保护用电流互感器额定一次电流值选择按保护故障校验电流取值将造成过电流保护、过负荷保护整定困难甚至无法给出二次定值。本文结合站用变保护整定计算,提出适用于站用变保护用的电流互感器额定一次电流值选择的方法。最后,已投运风电场工程站用变定值单验证了该方法的正确性。Due to the station transformer capacity of the wind farm is too small,the primary current value of the current transformer(CT)used for protection of station transformer is selected according to the protective checking current will cause it is difficult to set or even unable to give the secondary setting value.Combination with the protection setting calculation of station transformer,this paper proposes a method for selecting the primary current value of CT suitable for station transformerprotection.Finally,the correctness of this method is verified bysetting value of station transformer for wind farm project in operation.

关 键 词：电流互感器 一次电流值 过电流保护 过负荷保护 保护整定计算 

分 类 号：TM452[电气工程—电器]