电力系统及其自动化学报2012，Vol.24Issue(6)：83-89,7.
基于行波信息的广域后备保护故障判别新原理
New Principle of Fault Identification for Wide-area Back-up Protection Based on Traveling Wave Information
摘要
Abstract
A new fault identification method using wide-area traveling wave information is proposed. Getting grid voltage of each node, and using wavelet transform to obtain the initial traveling wave voltage, the initial traveling wave voltage energy can be calculated. Based on traveling wave propagation characteristics, the closer to the fault node the traveling wave is and the larger the traveling wave voltage energy will be. Comparing the size of wide-area traveling wave energy, if one node's initial traveling wave voltage energy is maximum, this node is determined as the fault node. Then accessing the initial traveling wave current information of all branches related to the fault node, the direction of the initial traveling wave power for each relevant branches can be determined, and if the power direction of one branch under the fault node is negative, the associated branch is fault line. The proposed method is verified correctly, clearly, simple by a large number of simulation analysis, and with a good prospect.关键词
广域后备保护/广域行波信息/电压初始行波能量/初始行波功率方向/故障判别Key words
wide-area back-up protection/ wide-area traveling wave information/ initial voltage traveling wave energy/ direction of the initial traveling wave power/ fault identification分类
信息技术与安全科学引用本文复制引用
吴浩,李群湛,南晓强,刘炜..基于行波信息的广域后备保护故障判别新原理[J].电力系统及其自动化学报,2012,24(6):83-89,7.基金项目
人工智能四川省重点实验室项目(2010RY005,2011RZY02) （2010RY005,2011RZY02）
