摘要
针对交直流混合微电网,提出一种接口换流器与直流侧电网储能DC/DC换流器的协调控制策略。不管系统工作在何种状态,储能DC/DC换流器始终进行电压控制以实现直流侧电压的零偏差,而接口换流器通过检测交直流混合微电网状态调节自身工作方式,实现微电网系统在并网及孤网模式下的稳定运行和2种模式稳定、快速的切换。通过计算机软件仿真及物理实验的验证,可以证明这种控制策略可以实现交直流混合微电网直流侧电压在孤网状态下的零偏差,并且运行与模式切换的稳定性良好。
This paper proposes coordinated control strategy for energy storage DC/DC converter and interface converter in AC/DC hybrid microgrid. In every state of the system,energy storage DC/DC converter always performs voltage control to realize zero deviation at DC side. Interface converter can regulate their work modes by detecting the state of AC/DC hybrid microgrid to realize the stable operation of microgrid system under grid-connected mode and isolated mode,and the stable and fast switching between these two operation modes. Through the verification of computer software simulation and physics experiment,it can be proved that the proposed control strategy can realize the zero deviation of DC-side voltage of AC/DC hybrid microgrid under the isolated mode,as well as the good stability in operation and mode switching.
出处
《电力建设》
北大核心
2016年第5期50-56,共7页
Electric Power Construction
基金
国家国际科技合作专项(2014DFG72620)~~
