摘要
针对以微型同步发电机组为二次控制主体的微电网,提出了一种在孤岛运行模式下的二次频率/电压分布式控制策略。首先,利用反馈线性化方法,设计了一种适用于微型同步发电机的二次频率/电压控制器,可消除由于微型同步发电机组一次控制导致的系统频率与电压偏差。其次,基于多代理系统理论,提出了一种分布式控制策略。所提出的频率/电压控制器只需要交换在通信有向图上的邻居节点频率/电压信息,不依赖中央控制器和复杂通信网络,提高了微电网的可靠性,同时可实现微型同步发电机有功出力按额定比分配。最后,在某一实际的微电网上验证了提出的二次控制策略的有效性。
Aiming at the island microgird with micro-synchronous generator as the main sources of sencondary controls, a distributed secondary frequency/voltage control scheme is proposed. First, a feedback linearization method is used to design a frequency/voltage controller suitable for micro-synchronous generators, which can eliminate the frequency and voltage deviation caused by the primary control of micro-synchronous generators. Then, a distributed control scheme is proposed based on multi-agent system theory. The proposed frequency/voltage controller only needs to exchange the frequency/voltage and active power information with its neighbors, which is independent of the centralized controller and complex communication networks and improves the reliability of the microgrid. Meanwhile, the active power outputs of micro-synchronous generators can be allocated according to their rated ratios. Finally, the effectiveness of the proposed secondaty control scheme is verified on a real microgrid.
引文
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