【摘要】 根据有功功率平衡原则、分散电源的产权关系和电气分布,提出了一种配电网分层孤岛运行的概念,可充分利用分散电源的供电能力,提高供电可靠性。接入多个分散电源的配电网络可划分为电厂级孤岛和变电站级孤岛,故障后的网络根据负荷匹配情况分层逐级解列。孤岛形成过程中,通过监测联络线的稳态功率变化计算孤岛内的功率不平衡,充分考虑孤岛的调节能力实现实时减载。最后,介绍了一种实现分层孤岛运行的分层分布式控制系统,借助高速通信网络,完成分层解列、实时减载、再同步与重合闸等功能。更多还原

【Abstract】 According to the principle of active power balance,proprietorship of dispersed generators and network topology,the operation concept of power distribution network in hierarchical islands of dispersed generators is presented,which makes the best use of dispersed generators to improve the reliability of power supply.A distribution network with dispersed generators can be split hierarchically into plant islands and substation islands according to load matching when fault occurs.The power imbalance within an island is calculated with the measured power flow change of tieline,and the real-time load shedding is executed with the consideration of island regulation capability.A hierarchically distributed control system is introduced,which integrates the functions of grid splitting,real-time load shedding,re-closing and re-synchronizing via high-speed communication network.更多还原