For islanded microgrids integrating distributed generators (DGs) with different generation cost and capacity, economic dispatch (ED) is its one of the key performance attributes and challenges. This paper proposes a completely distributed control strategy with improved reliability, flexibility and voltage quality for DC microgrids. Only depending on a sparse communication graph and neighbor information, the output power of each DG is adjusted to obtain global economic optimization while meeting the load demands and its capacity constraint by switching its control mode between distributed dispatch based on dynamic consensus algorithm and constant power control smoothly. The bus voltage is recovered accurately by construct a shortest communication line between bus agent and one DG to obtain the bus voltage. The stability and convergence of the proposed scheme have been analyzed. Simulation test has verified the feasibility and validity of the proposed control strategy.

中文翻译：

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考虑能力约束的完全分布式经济调度策略

对于集成了具有不同发电成本和容量的分布式发电机（DG）的孤岛微电网，经济调度（ED）是其主要性能属性和挑战之一。本文提出了一种完全分布式的控制策略，该策略提高了直流微电网的可靠性，灵活性和电压质量。仅根据稀疏的通信图和邻居信息，通过在基于动态共识算法和恒定功率控制的分布式调度之间切换其控制模式，即可调整每个DG的输出功率，从而在满足负载需求及其容量约束的同时获得全球经济优化顺利。通过在总线代理与一个DG之间构建一条最短的通信线路来获得总线电压，可以准确地恢复总线电压。分析了所提方案的稳定性和收敛性。仿真试验验证了所提控制策略的可行性和有效性。