| 引用本文: | 李卫国,运泽健,张师,等.基于粗糙集理论的t检验广域保护区域划分方法[J].电力系统保护与控制,2019,47(19):122-130.[点击复制] |
| LI Weiguo,YUN Zejian,ZHANG Shi,et al.Partition method of t-test wide-area protection area based on rough set theory[J].Power System Protection and Control,2019,47(19):122-130[点击复制] |
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| 摘要: |
| 电力系统广域继电保护中，合理、正确地实现保护区域划分是提高继电保护选择性和灵敏性的关键。在现代电网基于纵联比较原理来进行广域保护区域的划分方法中，每个IED的保护区域是根据IED与线路或母线的关系确定的，划分原则比较简单。随着互联大电网的逐渐形成，网架结构复杂化，拓扑结构多样化，仅仅根据保护区域划分原则进行简单的保护区域划分已经不适应电力系统广域继电保护区域划分的要求。因此，提出了一种基于粗糙集理论的t检验广域保护区域划分新方法。在系统结构发生变化时，该方法可以利用粗糙集理论约简冗余信息的功能，动态地寻找保护范围；利用t检验法最终确定每个IED广域保护范围；通过CEPRI-36节点的仿真系统模型进行验证。该方法对保护区域的划分不完全依赖系统结构关系，对结构多变的网络具有更好的适用性。 |
| 关键词: 广域继电保护 保护区域划分 粗糙集理论 约简冗余信息 t检验法 |
| DOI：10.19783/j.cnki.pspc.181221 |
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| 基金项目:吉林省科技发展计划项目(20160307014GX)“输变电设备运行状态在线监测与分析技术研究” |
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| Partition method of t-test wide-area protection area based on rough set theory |
| LI Weiguo,YUN Zejian,ZHANG Shi,BIAN Di,ZHANG Dong |
| (School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China) |
| Abstract: |
| In the wide area relay protection of power system, reasonable and correct protection area division is the key to improve the selectivity and sensitivity of relay protection. In modern power grid, based on the principle of longitudinal comparison, the partition method of wide-area protection area is carried out, the protection area of each IED is determined according to the relationship between IED and line or bus, and the division principle is relatively simple. With the gradual formation of interconnected large-scale power grid, the network structure is complicated and the topology structure is changeable, simple protection area division based on the principle of protection area division can no longer meet the requirements of wide-area relay protection area division of power system. Therefore, this paper proposes a new method of t-test area partition based on rough set theory. When the system structure changes, this method can use the function of reducing redundant information by rough set theory to find the protection range dynamically; use t-test method to determine the wide-area protection range of each IED; verify it by CEPRI-36 node simulation system model. This method does not depend entirely on the structural relationship of the system to divide the protected area, and has better applicability to the network with changeable structure. This work is supported by Science and Technology Development Program of Jilin Province — Research on On-line Monitoring and Analytical Technology of Transmission and Transformer Equipment Operation Status (No. 20160307014GX). |
| Key words: wide-area relay protection protection area division rough set theory reduction of redundant information t-test |
