摘要
为了稳定分布式能源微网电压,文章改进了分布式能源微网的拓扑结构,设计了三相独立可控的双向变流器,使其成为影响微网电压稳定的唯一主要因素。根据分布式能源微网电压和功率关系,应用低压线路的下垂特性,提出基于电压环、电流环、功率环等的多反馈控制器,同时也研究了控制器参数的设定方法。与传统控制方法比较结果以及多工况下的实验结果验证了双向变流器能稳定地控制微网电压,具有良好的稳态和动态性能。理论分析和实验结果证明了多反馈控制策略有效、可行,能稳定控制微网电压。
To stabilize the voltage of distributed energy microgrid,the topological structure of distributed energy microgrid was improved,and then three-phase independently controllable bidirectional converter was designed to make it becoming the only major factor affecting voltage stability of microgrid.According to the relation between voltage and power of distributed energy microgrid and utilizing the inverse droop control characteristic in low voltage transmission line,a multiple feedback controller based on voltage loop,current loop and power loop was proposed,meanwhile the setting of controller’s parameters was researched.Results of comparing with traditional control methods and the results of experiments under various operating conditions showed that the proposed bidirectional converter possessed good steady state and dynamic performances and by which the voltage of microgrid could be steadily controlled.It was proved by theoretical analysis and experiments that the proposed multiple feedback control strategy was effective and feasible.
出处
《电网技术》
EI
CSCD
北大核心
2012年第10期17-22,共6页
Power System Technology
基金
广州市重大科技专项(2010U1-D00231)
关键词
分布式能源
微网
下垂特性
多反馈控制
distributed energy
microgrid
droop control characteristic
multiple feedback control
