互联电力系统可靠性评估

Research on Improved Reliability Evaluation For Multi-area Interconnected Power System Based on Probabilistic Network-flow Model

基于随机网流模型的多域互联电力系统可靠性评估方法,以系统元件限制的最大网流模拟实际电力系统的潮流,能有效进行多域互联电力系统可靠性的评估,提高计算速度。然而,多域互联电力系统结构复杂、元件繁多,状态枚举困难,面临维数灾问题。本文以随机网流模型为基础,提出边际容量、递增搜索等概念,用于多域互联电力系统可靠性评估中。算例分析表明,改进方法极大地减少了枚举状态数,提高了可靠性评估效率;并验证了所提出的方法的有效性和正确性。

Probabilistic network-flow model is presented in evaluating reliability of multi-area interconnected power system.Com-pared with actual power flow, the presented model can solve the reliability evaluation of multi-area interconnected power system more effectively.To avoid the curse of dimensionality caused by the state-enumeration of multi-area interconnected power system with many elements, the conceptes of marginal capacity and incremental search are proposed to assess the reliability of multi-area interconnected power system based on the probabilistic network-flow model to reduce the enumerated state number.Practical results confirm the proposed method is valid in assessing overall reliability of multi-area interconnected power system.