基于分布参数模型的串联补偿双回线单线故障定位算法

发布时间：2018-03-22 23:22

本文选题：故障定位　切入点：同杆并架双回线　出处：《电力系统自动化》2017年01期 　论文类型：期刊论文

【摘要】：对于装设串联补偿(串补)装置的输电线路,由于与串联电容并联的保护元件金属氧化物可变电阻(MOV)的非线性特征,使得串补线路无法直接使用常规的输电线路故障测距方法。为此,提出了一种基于分布参数模型的串补双回线故障定位算法。按照故障点相对于串补的位置分为两个子算法,利用从本端、对端推算得到的故障点处电压相等的特点,消去串补装置近故障一侧的电压,结合故障点处过渡电阻的纯电阻性和故障序网边界条件,构造故障定位函数。该方法不依赖串补装置模型,不受MOV非线性的影响,无需预知串补装置相对于故障的位置,同时不存在伪根判别问题。EMTDC/PSCAD和MATLAB仿真结果计算验证了该方法的正确性。
[Abstract]:For transmission lines with series compensation (series compensation) devices, due to the nonlinear characteristics of the metal oxide variable resistor (MOV), a protective element in parallel with series capacitors, In this paper, a fault location algorithm based on distributed parameter model is proposed, which is divided into two sub-algorithms according to the position of fault point relative to series compensation. Using the characteristic of equal voltage at the fault point calculated from the local end and the opposite end, the voltage near the fault side of the series compensator is eliminated, combined with the pure resistance of the transition resistance at the fault point and the boundary condition of the fault sequence network. The fault location function is constructed. The method does not depend on the serial compensator model and is not affected by MOV nonlinearity, and does not need to predict the position of the series compensator relative to the fault. The simulation results of EMTDC / PSCAD and MATLAB show that the method is correct.
【作者单位】：电网智能化调度与控制教育部重点实验室(山东大学);国网天津市电力公司;国网山东省电力公司德州供电公司;

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