微网孤岛控制研究分析

Research on Micro-network Island Control

对微网孤岛方式下的功率进行动态调节,并分析了微网下垂控制策略。通过分析不同微源控制参数设计、微网孤网运行时的紧急控制决策、孤岛运行时跳机组的紧急控制,得出微网运行的控制策略表。结果表明:在孤岛运行,微网内部出现短路故障,迅速切除故障线路时,若储能系统输出功率过大,则应立即采取切负荷措施,切负荷量为功率缺额与热备用裕量之和;在孤岛运行,微网内部出现跳机组故障时,若储能系统输出功率过大,则应迅速采取切负荷措施,切负荷量为功率缺额与热备用裕量之和。

The power of the microgrid island mode was dynamically adjusted,and the microgrid droop control strategy was analyzed.By analyzing the design of different micro-source control parameters,emergency control decisions during the operation of the micro-grid isolated network,and emergency control of the skip unit during the island operation,a control strategy table for the micro-grid operation was obtained.The results showed that when operating in an island,a short circuit fault occurs in the microgrid,and the faulty line was quickly removed,if the output power of the energy storage system was too large,load-cutting measures should be taken immediately.The load-cutting amount was the sum of the power deficit and the hot spare margin.In island operation,when the tripping unit failure occurs in the microgrid,and the output power of the energy storage system was too large,load-shearing measures should be taken quickly.The load-shearing amount is the sum of the power deficit and the thermal reserve margin.