摘要
针对地铁牵引网现有故障测距方法测距准确度不高的问题,提出了一种基于解微分方程的故障测距法。为减小过渡电阻的影响,利用故障点两侧电流比值为常数,估算另一侧电流,进而计算出过流过渡电阻的电流。采用最小二乘法,利用双端不同步数据,分别计算左右电阻电感参数估计值,利用左右电阻关系求出故障距离,通过PSCAD进行仿真,验证了此方法的有效性。
Considering the low accuracy of the existing fault location methods in metro traction network, a new solution of fault location method based on differential equation is proposed. For reducing the effect of transition resistance, the ra- tio of the current on both sides of the fault place is considered as a constant. The current flowing past the transition re- sistance is calculated by the current of the other side. The estimating values of the resistance and the inductance on both sides are calculated by the asynchronous data using least square method. And the The fault distance is calculated by the relationship of the resistance on both sides. It is shown that this method is effective by the simulation using PSCAD.
出处
《电气开关》
2015年第2期62-65,68,共5页
Electric Switchgear
关键词
地铁
解微分方程
故障测距
metro
solution differential equation
fault location
