中文摘要：

当上层配电网故障或电能质量不满足要求时，微电网可通过控制策略切换等调度各微电源的出力，实现微电网孤岛运行。孤岛运行时，不同控制策略直接影响微电网的供电可靠性。通过对微电网最常见的两种控制策略（主从型和对等型）的分析，建立了计及控制策略的并网型微电网功率模型；通过对上层配电网进行最小路等值，建立微电网不同控制策略下的故障影响矩阵，提出了基于时序蒙特卡洛的并网型微电网可靠性评估方法。以此方法对改进的IEEE—RBTS系统进行可靠性评估，分析了两种控制策略对配电网可靠性指标的影响。算例表明：微电网加入配电网后可改善系统可靠性性能；对等型微电网比主从型微电网的可靠性要高。

英文摘要：

Once upper distribution network is failed or power quality does not meet requirements, micro-grid cooromates various micro-generations output by switching to a pre-set control strategy to ensure normal island operation. During island operation, different control strategies affect micro-grid＇s supply reliability directly. Through analysis of micro-grid＇s two most common control strategies （master-slave and peer-peer）, this paper builds micro-grid power model taking into account control strategies and proposes sequential Monte Carlo reliability evaluation method of grid-connected micro-gird through main power grid＇s minimal path equivalent and micro-grid breakdown influence matrix under different control strategies. Through evaluating the improved IEEE-RBTS using this method, reliability impact of two control srategies is analyzed. The illustrative example shows that micro-grid can improve the reliability performance of distribution network; and reliability of micro-grid with peer-peer control strategy is higher than micro-grid with master-slave control strategy.