基于相轨迹凹凸性的暂态失稳判据准确性验证  

Accuracy verification of transient instability criterion based on concavity and convexity of phase trajectory

作　　者：范新凯[1] 杨松浩 赵一铭 张保会[1] FAN Xinkai;YANG Songhao;ZHAO Yiming;ZHANG Baohui(State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学电气工程学院电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《电力自动化设备》2021年第1期159-165,171,共8页Electric Power Automation Equipment

基　　金：国家重点研发计划资助项目(2016YFB0900603);国家电网公司科技项目(52094017000W)。

摘　　要：已有研究证明基于相轨迹凹凸性的暂态失稳判据在二阶单机无穷大自治系统中严格成立,但将该判据推广到多机非自治时变系统中时,难以从理论上严格证明其正确性,因此通过大量暂态算例来验证凹凸性失稳判据在多机系统中的准确性和适用性。给出并详细阐述基于相轨迹凹凸性的暂态失稳识别流程,该流程改进了已有文献的实时分群方法,并补充了2个辅助判据,然后分别在IEEE 39节点系统和IEEE 145节点系统不同潮流方式、故障位置和故障持续时间下总计64566个算例进行扫描,结果表明,凹凸性判据的动作正确率高于99.9%,能够可靠、准确、快速地启动紧急控制。Previous studies have proved that the transient instability criterion based on concavity and convexity of phase trajectory is strictly established in a second-order single-machine infinite-bus system,but it is difficult to prove the correctness when extends this criterion to a multi-machine non-autonomous timevarying system.Therefore,numerous transient examples are used to verify the accuracy and applicability of the concave-convex criterion in multi-machine system.The process of transient instability identification based on concavity and convexity of phase trajectory is presented and described,which enhances the previous real-time clustering method and adds two auxiliary criterions.Then a total of 64566 examples are scanned respectively at different power flow modes,fault locations and durations under IEEE 39-bus system and IEEE 145-bus system.The results indicate that the accuracy of concavity and convexity of phase trajectory is higher than 99.9%,so the emergency control can be started reliably,accurately and quickly.

关 键 词：相轨迹 凹凸性 暂态失稳识别 故障扫描 紧急控制 

分 类 号：TM712[电气工程—电力系统及自动化]