基于同步相量测量单元的串联补偿线路自适应故障定位算法  

An Adaptive Fault Location Algorithm Based on PMU Measurement for Series Compensated Transmission Lines

作　　者：罗深增 李银红[1] 游昊 李本瑜 石恒初 

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074 [2]云南电力调度控制中心,昆明650011

出　　处：《电工技术学报》2017年第5期143-151,共9页Transactions of China Electrotechnical Society

摘　　要：针对串联补偿线路提出了基于同步相量测量单元的自适应故障定位算法。基于串联补偿线路两侧同步相量,采用最小二乘法在线估计串联补偿线路实时参数。线路故障后,采用分布参数模型,基于故障通路电压、电流相位特性构造故障定位函数,无需串补模型。理论分析及仿真表明,所构造的故障定位函数在定位区间具有单调近似线性变化的特性,采用二分法或弦截求根法即可快速精确求解故障点。基于PSCAD/EMTDC和Matlab的仿真结果表明,故障定位方法实现简单,计算速度快、精度高,对不同的故障类型、过渡电阻和故障位置均有较好的适用性。An adaptive fault location algorithm was proposed based on synchronized phasor measurement unit（PMU） for series compensated transmission lines.Based on the monitored synchronized voltage phasor and current phasor on both sides,the on-line parameters of series compensated transmission lines required for fault location algorithm were obtained by utilizing the least square estimation method.When a line in failure,distributed line parameter model and phase characteristics of fault point voltage and fault path current were utilized to form fault location function.Therefore,no model of series compensated device is needed.Theoretical analysis and simulation results show that the fault location function is monotonic and changes linear approximately in the possible fault sections.As a result,the fault point can be extracted efficiently and precisely by method of bisection or secant.Simulation results based on PSCAD/EMTDC and Matlab show that the fault location procedure is implemented simple,fast and accurate.Besides,the algorithm is suitable to various fault types,fault positions and fault resistances.

关 键 词：串联补偿线路 同步相量测量单元 在线参数 自适应故障定位算法 

分 类 号：TM711[电气工程—电力系统及自动化]