基于PC机群的发输电系统可靠性评估

为提高发输电系统可靠性评估的计算速度，提出了一种可靠性评估并行交流潮流法。该方法的核心是基于大规模电网分解协调原理的粗粒度空间并行快速解耦潮流模型和算法。其特点是：把系统划分为几个子网络；用LU分解法计算子网络和边界节点的交流潮流；根据进程间交换的潮流违限消息进行校正控制；最后计算可靠性指标。提出的方法在用个人计算机和1000M以太网构建的计算平台上实现了大电力系统充裕度评估交流潮流法的并行计算。通过对IEEE-118、IEEE-RTS96系统和一个实际电力系统进行的计算分析，验证了方法的正确性、可行性和有效性。

Reliability Assessment of Composite Generation and Transmission Systems Based on Personal Computer Cluster

In order to reduce computational burden on reliability assessment of composite generation and transmission systems, a parallel AC load flow based assessment method of such systems is proposed in this paper. The essential of this method is the model and algorithm of a parallel fast decoupled load flow with coarse-grain spaces based on the decomposition and coordination principle of large-scale networks. The calculation processes related to the methodology include partitioning network into several sub-networks, calculating the AC load flow of these networks with boundary nodes by LU factorization, carrying out corrective control according to the messages of violated limits revealed from the load flow, and finally, accumulating reliability indices of the concerned system. Making use of the developed parallel algorithm, the reliability assessment of a bulk power system can be implemented on the parallel computing platform constructed with a system formed by multiple-microcomputer and a 1000M Ethernet network. The proposed approach is applied to IEEE-118, IEEE-RTS 96 and a real power system, and the results show that the method is correct, feasible and valid.