CAJ | 학술논문

在带T型分支的输电线路中,利用单端的工频故障信息或者行波故障信息实现各种情况下的故障测距较难.在分析带T型输电线路行波传播特征的基础上,提出了依据故障行波折、反射特性进行故障分支判别和故障点测距的方法.T型线路基于单端故障行波的测距结果上传至主站端,参考调度主站端基于工频故障信息的测距结果,得到最终的故障测距结果.该方法充分利用调度主站的故障信息,不依赖故障行波间的极性关系,同时可以实现波速的在线校正并取得优化的测距结果.ATP/EMTP仿真结果表明该方法测距精度高,具有一定的实用价值.
재대T형분지적수전선로중,이용단단적공빈고장신식혹자행파고장신식실현각충정황하적고장측거교난.재분석대T형수전선로행파전파특정적기출상,제출료의거고장행파절、반사특성진행고장분지판별화고장점측거적방법.T형선로기우단단고장행파적측거결과상전지주참단,삼고조도주참단기우공빈고장신식적측거결과,득도최종적고장측거결과.해방법충분이용조도주참적고장신식,불의뢰고장행파간적겁성관계,동시가이실현파속적재선교정병취득우화적측거결과.ATP/EMTP방진결과표명해방법측거정도고,구유일정적실용개치.
It is difficult to locate the fault of T-type transmission lines by the fault information of power frequency or traveling wave from single end.The spread features of traveling wave along T-type transmission lines are analyzed and a method of faulty branch selection and fault locating is proposed based on the characters of traveling wave reflection and refraction.The fault location detected by the single.end traveling waves is sent to the master station.and combined with the fault location detected by master station based on the power frequency information,the ultimate result is obtained.The method makes full use of the fault information from master station.and it,independent of the polarity relationship between traveling waves,realizes online correction of wave speed and optimizes the results.The ATP/EMTP simulation shows its high accuracy and practicability.