基于双端不同步数据的故障定位的新算法研究

基于传输线节点导纳方程,提出了一种利用双端不同步采样数据进行故障定位的方法。该方法根据电流边界条件建立求解不同步角差的方程,然后通过搜索迭代的方法搜索满足非故障相故障过渡电流等于零的解,来确定不同步角差,进而得到故障距离。该方法采用分布参数的线路模型,使用相参数,弥补了双端同步法的不足。该算法通过引入不同步角差δ来考虑双端数据不同步的因素。EMTP仿真结果表明,测距结果精度较高。

New fault location method based on two-terminal asynchronous sampling data

Based on the nodal admittance equation of transmission line, a new method of fault location with two-terminal asynchronous sampling data is proposed. This method uses boundary conditions of current to establish equation of asynchronous angle difference. The iterative searching method is used to search the zero solution for fault transition current of non-fault current. The asynchronous angle difference and fault distance are acquired. The method uses distributed parameters line model and phase coordinate (a b c) parameters. The asynchronous angle difference is introduced to consider the asynchronous factors of two terminals. EMTP simulation result verifies the effectiveness of this method.