内蒙古电力技术
內矇古電力技術
내몽고전력기술
Inner Mongolia Electric Power
2015年
5期
79-81
,共3页
刘瑞%郭艺博%乌小茜%阿敏夫
劉瑞%郭藝博%烏小茜%阿敏伕
류서%곽예박%오소천%아민부
风电场%电流互感器%5％误差曲线%准确限制系数%二次电动势%性能估算
風電場%電流互感器%5％誤差麯線%準確限製繫數%二次電動勢%性能估算
풍전장%전류호감기%5％오차곡선%준학한제계수%이차전동세%성능고산
wind farm%current transformer%5％ error curve%accuracy limit factor%secondary e.m.f%performance evaluation
对某风电场的1组保护用电流互感器进行5%误差现场实测，测试负载电阻值、准确限值系数等数据，以《DL/T 866—2004电流互感器和电压互感器选择及计算导则》中3个不同验算标准为计算依据，即一般选择验算、按额定二次极限电动势验算、按实际准确限值系数验算，计算当主变压器高压侧发生短路故障时，电流互感器的二次测量值。测量结果为该组电流互感器符合5%误差要求，可保证保护装置采集到的二次电流值正确、有效，不会因电流采集值的误差过大而发生误动、拒动。
對某風電場的1組保護用電流互感器進行5%誤差現場實測，測試負載電阻值、準確限值繫數等數據，以《DL/T 866—2004電流互感器和電壓互感器選擇及計算導則》中3箇不同驗算標準為計算依據，即一般選擇驗算、按額定二次極限電動勢驗算、按實際準確限值繫數驗算，計算噹主變壓器高壓側髮生短路故障時，電流互感器的二次測量值。測量結果為該組電流互感器符閤5%誤差要求，可保證保護裝置採集到的二次電流值正確、有效，不會因電流採集值的誤差過大而髮生誤動、拒動。
대모풍전장적1조보호용전류호감기진행5%오차현장실측，측시부재전조치、준학한치계수등수거，이《DL/T 866—2004전류호감기화전압호감기선택급계산도칙》중3개불동험산표준위계산의거，즉일반선택험산、안액정이차겁한전동세험산、안실제준학한치계수험산，계산당주변압기고압측발생단로고장시，전류호감기적이차측량치。측량결과위해조전류호감기부합5%오차요구，가보증보호장치채집도적이차전류치정학、유효，불회인전류채집치적오차과대이발생오동、거동。
Make a 5% error filed test for a unit of protective current transformer in a wind farm. The test data included the load impedance and the accuracy limit coefficient, etc. Based on three different checking criteria in DL/T 886-2004 The guide for selection and calculation of current transtormers and voltage transtormers, including general choice checking, rated limiting secondary e.m.f. checking, and the accuracy limit coefficient checking, with which calculating the secondary measurement value as short-circuit fault occured on the main transformer high voltage side. The measurement result showed that the current transformer met the requirement of 5% error, which could guarantee the secondary current value correct and effective, and avoid the maloperation and refuse operation resulted from the overlarge current value.
