摘要
针对双闭环PI控制策略抑制负载扰动及电网电压波动能力差,以及系统动态响应慢等问题,提出了负载电流前馈策略来提高系统抗负载波动能力。并且电流环采用基于PID趋近率的滑模变结构控制策略来满足前馈控制策略对内环响应速度的要求,并提高系统动态性能以及鲁棒性,应用PID趋近率可以有效抑制传统变结构的抖振问题。应用Matlab/Simulink软件进行仿真,并在多功能新能源实验平台进行实验结果显示所提出控制方法可有效抑制负载变化、电网电压波动以及其它干扰所对直流电压稳定性的影响,具有很强的鲁棒性,动态响应速度快且性能稳定。
To improve the function of traditional double closed-loop PI control strategy,in which insurance load dis-turbance and voltage fluctuation have a great influence on the DC bus voltage,as well as dynamic response problem.Load current feed forward strategy was proposed to weaken load disturbance. Current loop uses sliding mode controlbased on PID trending law strategy to satisfy the requirement of load current feed-forward and improve robusness.PID trending law can minimize the vibration of sliding mode control. Simulation with Matlab/Simulink and experi-ment result of new energy experimental platform shows proposed method can effectively eliminate the DC bus voltagefluctuation,which caused by load change and grid voltage fluctuation,fast dynamic response and robustness.
出处
《电子器件》
CAS
北大核心
2016年第5期1275-1279,共5页
Chinese Journal of Electron Devices
基金
江苏高校优势学科建设工程项目(61074019)
