广东电力
廣東電力
엄동전력
GUANGDONG ELECTRIC POWER
2014年
4期
41-46
,共6页
电子式电流互感器%电磁式电流互感器%变压器差动保护%仿真模型
電子式電流互感器%電磁式電流互感器%變壓器差動保護%倣真模型
전자식전류호감기%전자식전류호감기%변압기차동보호%방진모형
electronic current transformer%electromagnetic current transformer%transformer differential protection%simu-lation model
为了分析电磁式电流互感器(current transformer,CT)和电子式电流互感器(electronic current transform-er,ECT)对继电保护的适应性,基于 PSCAD和MATLAB软件搭建了采用 CT 和 ECT 的变压器差动保护仿真模型,针对变压器区内和区外故障分析了变压器差动保护的可靠性与灵敏性。仿真结果表明,电磁式电流互感器会因磁饱和问题导致可靠性降低,造成差动保护误动；电子式互感器传变特性好,可以在保证可靠性的前提下有效提高差动保护的灵敏性,提升保护系统的性能。
為瞭分析電磁式電流互感器(current transformer,CT)和電子式電流互感器(electronic current transform-er,ECT)對繼電保護的適應性,基于 PSCAD和MATLAB軟件搭建瞭採用 CT 和 ECT 的變壓器差動保護倣真模型,針對變壓器區內和區外故障分析瞭變壓器差動保護的可靠性與靈敏性。倣真結果錶明,電磁式電流互感器會因磁飽和問題導緻可靠性降低,造成差動保護誤動；電子式互感器傳變特性好,可以在保證可靠性的前提下有效提高差動保護的靈敏性,提升保護繫統的性能。
위료분석전자식전류호감기(current transformer,CT)화전자식전류호감기(electronic current transform-er,ECT)대계전보호적괄응성,기우 PSCAD화MATLAB연건탑건료채용 CT 화 ECT 적변압기차동보호방진모형,침대변압기구내화구외고장분석료변압기차동보호적가고성여령민성。방진결과표명,전자식전류호감기회인자포화문제도치가고성강저,조성차동보호오동；전자식호감기전변특성호,가이재보증가고성적전제하유효제고차동보호적령민성,제승보호계통적성능。
For analyzing adaptability of electromagnetic current transformer and electronic current transformer to relay pro-tection,this paper establishes simulation model for transformer differential protection by using CT and ECT based on PSCAD and MATLAB software and analyzes reliability and sensitivity of transformer differential protection aiming at inside and outside faults.Simulation results indicate that reliability of electromagnetic current transformer is reducing for reason of magnetic saturation which may cause differential protection malfunction while transferring characteristic of electronic cur-rent transformer is good enough to effectively improve sensitivity of differential protection and promote performance of the protection system on the premise of ensuring reliability.
