| 引用本文: | 李珊,何怡刚,项胜,等.基于故障电压比较与多信息融合的广域后备保护算法[J].电力系统保护与控制,2015,43(22):92-98.[点击复制] |
| LI Shan,HE Yigang,XIANG Sheng,et al.A wide backup protection algorithm based on fault voltage comparison and multi-information fusion[J].Power System Protection and Control,2015,43(22):92-98[点击复制] |
|
| 摘要: |
| 为了提高广域后备保护系统的容错性，且使其在复杂工况下具有良好的动作性能，提出一种将故障电压比较和多信息融合相结合的广域后备保护算法。该算法利用本线路和相邻线路的保护动作值加权得到综合值，由其与故障门槛值的比值计算出对应的故障概率。同时利用相量测量单元(Phasor measurement unit，PMU)测得的线路一侧电压电流推算另一侧电压故障分量，以推算值与测量值的比值获得PMU数据对应的故障概率，将两种故障概率加权综合识别故障元件。该算法原理简洁，基于IEEE 4机8节点系统的算例结果表明，该算法在高阻接地、非全相运行再故障、故障转换等工况下具有良好的动作性能，多个保护拒动与误动时均能准确识别故障元件，有较高的容错性。 |
| 关键词: 广域后备保护 故障电压比较 多信息融合 相量测量单元 加权综合 |
| DOI：10.7667/j.issn.1674-3415.2015.22.014 |
| 投稿时间：2015-02-05修订日期：2015-05-18 |
| 基金项目:国家杰出青年科学基金(50925727)；国防科技计划项目(C1120110004、9140A27020211DZ5102)；教育部科学技术研究重大项目(313018)；安徽省科技计划重点项目(1301022036) |
|
| A wide backup protection algorithm based on fault voltage comparison and multi-information fusion |
| LI Shan,HE Yigang,XIANG Sheng,LI Demin,LIU Maoxu,ZHANG Yuzhu |
| (School of Electrical Engineering & Automation, Hefei University of Technology, Hefei 230009, China) |
| Abstract: |
| In order to improve the fault-tolerance of wide area backup protection and make it has satisfactory performance in complexity operating condition, a wide area protection algorithm combining fault voltage comparison and wide area protection information is proposed. Protection information of the line and the adjacent line are weighed to get the comprehensive value, then the corresponding probability of failure is calculated by the ratio of comprehensive and threshold value. At the same time, measured voltage and current by phasor measurement unit (PMU) from one terminal of transmission line are provided to estimate the voltage fault components of the other terminal. Then the corresponding probability of failure is obtained by the ratio of measured and estimated value, these two probabilities are weighted comprehensive to find the fault component. The principle of this algorithm is simple. The simulation tests based on IEEE 5-generator 8-bus system illustrate the validity under various complex conditions, such as high impedance earth fault, open-phase running of fault again, fault conversion, etc. And it shows the effectiveness and high fault-tolerance capability of the algorithm with the mis-operation and refuse-operation of multiple protections. |
| Key words: wide area backup protection fault voltage comparison multi-information fusion phasor measurement unit (PMU) weighted comprehensive |
