基于网络化简的含分布式电源的配电网可靠性分析

Reliability Evaluation Based on Network Simplification for the Distribution System with Distributed Generation

基于简化等效网络,提出了利用序贯蒙特卡洛仿真法对含风力、光伏电池等分布式电源的配电系统可靠性进行评估的新方法。该方法利用简化网络得到区域元件故障影响表,然后基于序贯蒙特卡洛仿真法对分布式电源的随机功率输出、设备运行与故障状态以及负荷的随机容量对系统可靠性的影响进行了分析及计算。基于网络化简而建立的区域元件故障影响表明显简化了可靠性分析计算过程。在随机仿真分析中,采用对网络设备和分布式电源的状态进行同步抽样的策略,进一步提高了仿真的精度和计算速度。多个算例的计算结果及比较证明了文中算法的有效性和实用性。

Based on the simplification equivalent network,for the distribution system with distributed generations,a new reliability evaluation method by the Monte Carlo time sequential simulation is presented. After the zone element failure effect table is obtained on the simplification network,the impact of the DGs’ stochastic power output,statuses of the devices,and the stochastic capacity of the loads on the distribution system are analyzed and calculated by the Monte Carlo time sequential simulation. By the equivalent network,the ransack processing during the reliability analysis and calculation is reduced significantly,and the repetitive failure analysis is avoided by the method of zone element failure effect table. As a result,the simulation calculation procedure is accelerated. Furthermore,during the stochastic simulation processing,the strategy of synchronous sampling for the statuses of DGs and the network devices is employed. Compared with the traditional methods,the proposed method increases the precision of the simulation and the speed of calculation. The results of the test examples demonstrate the validity and practicability of the new method.