云南水力发电
雲南水力髮電
운남수력발전
YUNNAN WATER POWER
2013年
4期
145-148
,共4页
变压器%差动保护%校验%变斜率%比率制动
變壓器%差動保護%校驗%變斜率%比率製動
변압기%차동보호%교험%변사솔%비솔제동
transformer%differential protection%check%variable slope ratio%ratio restraint
针对变压器变斜率比率制动差动保护制动方程较复杂，校验较困难的问题，从数学角度深入分析各电流之间的数量关系，简化差动电流、制动电流和测试电流之间的关系，提出一种变斜率比率制动差动保护校验的方法，并结合 Excel自动计算表格，可以快速准确校验保护的动作曲线，提高校验准确度和校验效率。通过某电站的校验实例验证该方法快捷、准确，接结简便，易于操作，可以校验保护装置的整个工作状态。
針對變壓器變斜率比率製動差動保護製動方程較複雜，校驗較睏難的問題，從數學角度深入分析各電流之間的數量關繫，簡化差動電流、製動電流和測試電流之間的關繫，提齣一種變斜率比率製動差動保護校驗的方法，併結閤 Excel自動計算錶格，可以快速準確校驗保護的動作麯線，提高校驗準確度和校驗效率。通過某電站的校驗實例驗證該方法快捷、準確，接結簡便，易于操作，可以校驗保護裝置的整箇工作狀態。
침대변압기변사솔비솔제동차동보호제동방정교복잡，교험교곤난적문제，종수학각도심입분석각전류지간적수량관계，간화차동전류、제동전류화측시전류지간적관계，제출일충변사솔비솔제동차동보호교험적방법，병결합 Excel자동계산표격，가이쾌속준학교험보호적동작곡선，제고교험준학도화교험효솔。통과모전참적교험실례험증해방법쾌첩、준학，접결간편，역우조작，가이교험보호장치적정개공작상태。
Considering that the transformer variable slope ratio restraint differential protection braking e-quation is rather complicated and its check is quite difficult ,the paper analyzes the quantitative relation be-tween various currents ,simplifies the relations between the differential current ,the braking current and the test current and proposes a variable slope ratio restraint differential protection check method from the angle of mathematics .Further the paper uses the Excel automatic calculation form to check the activation curve of the check protection in a quick and accurate way to improve both check accuracy and check effi-ciency .The check living example of a certain hydropower plant proved that the method is quick ,accurate , easy to do connection and to operate and is able to check the whole working condition of the protection de-vice .
