中文摘要：

直流微电网以其可靠性高、便于控制、损耗低等优点成为未来家庭的主要供电结构。本研究针对目前已有直流微电网控制策略的不足,研究了基于直流母线信号（DC Bus Signaling,DBS）的控制策略,该控制策略可以最大程度地提高新能源的利用率,采用直流母线信号实现直流微电网的最优控制;通过研究直流微电网的下垂控制实现了同一个电压等级下多个微源的功率分配及电压控制;通过研究各微源变换器的输出特性,实现了储能单元及并网变换器的下垂控制与恒功率平滑切换的控制方法;最后在MATLAB/Simulink中搭建了基于平均模型的直流微电网的仿真模型,对孤岛运行时的控制策略进行了验证,仿真结果表明所设计的控制算法能够实现直流微电网的协调控制。

英文摘要：

DC microgrid will become the main power supply system for the future home depend on their high reliability and the characteristics of easy to control and low lose.This paper uses the DBS（DC Bus Signaling） to control the power of microsource according to the problem of presented control strategies.DBS control method can maximize the use of the renewable sources,and achieve optimal control of the DC microgrid by use DC bus voltage.By studying the droop control of DC microgrid the power sharing of parallel converter and voltage stability can be realized.In this paper,a simple smooth switch method between DC droop control and constant power operation is proposed by studying converter output characteristics of the microsource.Converter average model is built,and the isolated mode is simulated in MATLAB/Simulink.The research results show that this control strategy can realize the coordinated control of DC microgrid.