微电网孤岛运行模式下的协调控制策略

Co-operation control strategies for islanded microgrids

微电网是一种特殊形式的有源配电网,为大规模分布电源控制提供了一种有效方法。微电网能运行在并网和孤岛状态,并网时可以从主网吸收电能或向主网提供电能,当主网发生电能质量事件时,微电网能从主网脱离单独运行。微电源和存储设备必须协作才能维持微电网孤岛运行。列举并讨论微电网孤岛运行,总结不同作者提出的微电网协调控制策略,对这些不同的控制方法进行比较,提出应根据微电网不同运行模式和影响因素对分布式电源采用不同控制策略。

Microgrids as a particular form of active networks were explained and presented as an effective solution for the control of grids with high levels of distributed resources. The microgrid can operate in grid-connected mode or island mode. In grid-connected mode, the microgrid either draws or supplies power to the main grid. The microgrid can separate from the main grid whenever a power quality event in the main grid occurs. The micro-sources and storage devices should co-operate with each other to maintain the integrity of the islanded microgrid. The issues concerning the island operation of microgrids were enumerated and discussed. Some co-operation approaches proposed by various authors were presented. The strategies were then compared based on their applicability to different control requirements. The choice of mierogrid co-operation strategy should take into account operation modes and variety of affective factors.