摘要
通过DC/DC双向变换器将蓄电池储能接入STATCOM直流侧,直流侧电容将DC/DC侧和STATCOM侧耦合成一整体。通过建立整体的大信号模型的分析,建立了dq坐标系下基于线性解耦的小信号动态模型,实现了DC/DC侧和STATCOM侧的解耦控制。基于该模型,对DC/DC的电流环控制器,以及STATCOM侧电流电压双闭环与功率前馈相结合的控制器设计,实现了对DC/DC侧充放电功率,以及直流侧电容电压稳定输出的控制。并通过Matlab/Simulink仿真验证设计的正确性。
Battery energy storage is linked to STATCOM dc-link through DC/DC bidirectional converter, DC/DC side and STATCOM side is coupled into a whole by dc-link capacitor. The dq coordinate based on linear decoupling small signal dynamic model is established through analysis of building holistic large signal model, realizing decoupling control of DC/DC side and STATCOM side. Based on this model, DC/DC side charge/discharge power is realized through design of DC/DC current loop controller as well as STATCOM side current-voltage double-loop and power feed-forward term combination controller, realizing DC/DC side charge/discharge power and dc-link capacitor output voltage stability control. Design correctness is validated by Matlab/Simulink simulation and experiment.
出处
《电气技术》
2014年第6期1-4,30,共5页
Electrical Engineering
关键词
蓄电池储能
DC/DC双向变换器
小信号模型
解耦控制
功率前馈
battery energy storage
DC/DC bidirectional converter
small signal model
decoupling control
power feed-forward
