计及PMU最优配置的输电线路广域自适应故障定位算法

发布时间：2018-10-21 07:48

【摘要】：针对电网信息不全条件下的输电线路故障定位问题,提出一种计及相量测量单元(phasor measurement unit,PMU)最优配置的广域自适应故障定位方法。该文在分析基于故障可观测性的故障定位原理的基础上,建立了计及零注入节点实现全网线路故障可观测性的PMU最优配置模型;提出了基于定位域的广域故障定位策略,根据系统拓扑和PMU节点划分定位域,电网拓扑结构发生变化时,只需局部更新相应定位域。线路故障后,利用PMU测量结果快速界定故障的定位域,无需线路故障信息,提高了定位算法的自适应能力。基于PSCAD/EMTDC和Matlab的仿真结果表明,该文提出的计及零注入节点的PMU优化配置方法能有效减少PMU数量,基于定位域的故障定位算法自适应能力强,定位结果精度高,对系统拓扑结构变化、各种故障类型、过渡电阻、故障位置均有较好的适用性。
[Abstract]:In order to solve the problem of transmission line fault location under the condition of incomplete power network information, a wide-area adaptive fault location method considering the optimal configuration of phasor measurement unit (phasor measurement unit,PMU) is proposed. On the basis of analyzing the principle of fault location based on fault observability, this paper establishes a PMU optimal configuration model which considers zero-injection nodes to realize the observability of fault in the whole network, and proposes a wide-area fault location strategy based on location-area. According to the system topology and the PMU node, the location domain is divided. When the topology of the power network changes, only the corresponding location region needs to be updated locally. After line fault, the fault location region is defined quickly by using PMU measurement results, and the adaptive ability of location algorithm is improved without line fault information. The simulation results based on PSCAD/EMTDC and Matlab show that the proposed PMU optimal configuration method with zero injection nodes can effectively reduce the number of PMU, and the fault location algorithm based on location domain has strong adaptive ability and high accuracy. It is suitable for system topology change, various fault types, transition resistance and fault location.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);云南电力调度控制中心;
【分类号】：TM75

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