电力系统保护与控制Issue(1)：120-126,7.
继电保护系统长期和短期可靠性的参数灵敏度算法
Parametric sensitivity of long and short term reliability for relay protection systems
摘要
Abstract
Protection systems are typical multi-element, multi-state, uncertain systems, whose reliability is critical to power system security. The long-term reliability is decided by element availability, and short-term reliability is decided by element availability and initial state. To quantify the critical element and improve reliability of protection systems, sensitivity models are proposed to quantify the contribution of the transition rates to the long and short-term state probabilities. The steady-state probability is proved to be the last column of the inverse of the transition matrix, whose sensitivity is given by the transition matrix and its derivative. The instantaneous probability is given by a matrix exponential, whose sensitivity is defined as the derivative of a matrix series, which converges with limited terms. The proposed algorithm is validated by a dual protection scheme of transmission lines. This work is supported by National Natural Science Foundation of China (No. 51277049).关键词
保护系统/可靠性/灵敏度/稳态状态概率/瞬时状态概率Key words
protection system/reliability/sensitivity/steady-state probability/instantaneous state probability分类
信息技术与安全科学引用本文复制引用
李生虎,朱莹,朱婷涵..继电保护系统长期和短期可靠性的参数灵敏度算法[J].电力系统保护与控制,2013,(1):120-126,7.基金项目
国家自然科学基金(51277049) （51277049）
