Secondary protective control for mitigation of protection misoperations in electric power systems

作     者：N.Eva WU Qiu QIN 

作者机构：Department of Electrical and Computer EngineeringBinghamton UniversityBinghamtonNY 13902USA 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2016年第4卷第3期

页      面：427-439页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

基　　金：the New York State Energy Research and Development Authority under NYSERDA Contract #30733 Michael Razanousky 

主　　题：Availability and security Fault-tolerance Fault-coverage and fault-diagnosis Hybrid modeling and 

摘      要：This paper investigates the feasibility of a selective secondary protective control strategy proposed to maximize the likelihood of recovery from misoperations of the existing(primary) protection in a power system. A scalable stochastic discrete-state model is established, taking into consideration of the processes of protection misoperations and their mitigations. Such misoperations have been a main culprit of cascading failures in modern power systems. The likelihood of recovery from protection misoperations is quantified by a set of security indices that formally incorporate the uncertain knowledge of the continuous-state of rotor angles/speed deviations of synchronous generators and that of the discretestate of equipment faults and primary protection misoperations. The proposed secondary protection leverages on the ever more available time-synchronized samples of networked sensors for diagnosis and fault-tolerant control to cost effectively improving power system reliability without altering the existing protection system. The technology readiness for implementing the secondary protective control is examined through a three-area test system.