大型输电系统运行可靠性分析的实用技术

为使输电系统运行的可靠性分析进入实用阶段，本文采用时序模拟法模拟系统实际运行状态，采用下次事件推进法调整模拟时钟。采用交流潮流对系统分析，其结果作为线路过负荷和节点电压越限的判据。用灵敏度法调整发电机出力和削减负荷量。采用简化搜索法进行网络结构辩识，并提出了适用于工程实际的解列处理措施。在系统不同的调度运行方式下考虑了多重故障、母线及变压器的相关故障等。依据算法编制的软件可计算系统及各节点的可靠性

PRACTICAL TECHNOLOGY OF RELIABILITY EVALUATION OF BIG TRANSMISSION SYSTEMS

To put the reliability evaluation of transmission systems into practical stage,a timesequencing Monte Carlo method is used to simulated the real operating statue of the systems and a next event moving forward principle is used to adjust the simulative clock in this paper.Based on the AC load flow calculation,the overload of lines and the bus voltages beyond limits are indicated.The sensitivity method is used to adjust the outputs of generators and reduce the relevant loads.A simplified search method is used to identify the network structure.Practical measures for dealing with the problems caused by the system disconnection are proposed.Multi failures of lines,dependent faults of buses and transformers are considered.Under various operating moles of system.The reliability indices of the overall system and nodes(buses) as well as the network losses can be calculated with the developed program.The reasonableness and feasibility of solving methods to the several practical technical problems mentioned above are verified by the practical example give in the end of the paper.