考虑实际l-v曲线的波速寻优算法在直流行波故障测距中的应用研究

Study on the Application of Wave Speed Optimization Algorithm Considering Actual l-v Curve in the DC Traveling Wave Fault Location

针对基于波速寻优的直流行波故障测距算法在实际应用中可能受到实际条件的约束,提出一种综合考虑大地电阻率、弧垂变化以及数值仿真本身的固有误差等因素的修正l-v(距离-波速)曲线方法。仿真结果表明,采用修正后的l-v曲线进行测距具有良好的测距效果,收敛速度快,测距精度高,大大提高了波速寻优算法在实际直流工程中应用的可行性。

Since the DC traveling wave fault location algorithm based on wave speed optimization may be restricted by actual conditions in practical applications,a modified l-v(distance-speed)curve that comprehensively considers multiple factors(e.g.,earth resistivity,sag change,and inherent errors of numerical simulation)is proposed in this paper.Finally,simulation samples are corrected by the correction coefficient,and the corrected l-v curve that can be applied to the actual traveling wave fault location is obtained.Simulation results show that traveling wave fault location using the modified l-v curve is effective and accurate,which greatly improves the feasibility of applying the wave speed optimization algorithm in actual DC projects.