摘要
文中提出了一种改进的单相光伏并网逆变器双闭环控制策略,电压外环采用准PR调节可以实现对参考电压的无静差跟踪,抑制了电网频率波动对系统的影响,提高了系统的抗干扰能力。电容电流作为电流内环控制量改善了系统的动态响应性能以及带负载能力。建立了系统控制结构模型并进行了参数设计,最后通过仿真验证了所提理论的正确性和有效性。
A new double closed-loop control strategy of single grid-connected photovoltaic systems is proposed.The voltage outer-loop uses quasi-PR adjuster to track the reference voltage without steady-state error and the effect of voltage fluctuations is inhibited.The current inner-loop adopts capacitor current feedback to improve the dynamic performance and load capacities.The structure model of the control system is established and the parameters is designed.The simulations and experiments verify the validity and effectiveness of the proposed method.
作者
焦静静
康明才
张兰红
JIAO Jing-jing;KANG Ming-cai;ZHANG Lan-hong(School of Electronic Engineering & Photoeletric Technology,Nanjing University of Science & Technology,Nanjing 210094,China;Yancheng Institute of Technology,Yancheng 224003,Jiangsu Province,China)
出处
《信息技术》
2017年第7期125-128,共4页
Information Technology
关键词
准PR调节
双闭环控制
电容电流反馈
光伏并网
quasi-PR adjuster
double closed-loop control
capacitor current feedback
grid-connected photovoltaic
