光伏并网逆变器H_∞鲁棒控制策略的研究  

Research on H∞robust control of photovoltaic grid-connected inverter

作　　者：黄存荣[1] 王冰[1] 程永乐[1] 郝巍 

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]宁夏电投尚德太阳能发电有限公司,宁夏银川751100

出　　处：《电源技术》2016年第3期607-609,641,共4页Chinese Journal of Power Sources

基　　金：国网科技项目(规模化光伏发电运行控制关键技术研究与示范)

摘　　要：光伏并网系统中,为了抑制逆变器参数不确定和电网干扰对输出电能的影响,提出了基于H∞鲁棒控制的光伏并网逆变器控制策略。在分析三相光伏并网逆变器的数学模型基础上,建立了包含不确定参数和电网干扰的模型,基于系统性能要求选取加权函数,并求得广义被控对象的状态空间实现,通过求解代数Riccati方程,得到H∞鲁棒控制器。通过仿真与传统PI控制方法进行比较,验证了该控制器对参数变化和电网干扰具有较强的鲁棒性。In order to suppress the influences of inverter parameters uncertainty and grid disturbances to the output power quality, the control strategy of photovoltaic grid inverter based on H∞robust control was proposed. Based on analysis of the three-phase photovoltaic grid inverters mathematical model, a modified model was constructed, which contained uncertain parameters and grid disturbances. The weighting function was selected according to the requirements of system performance, and the generalized state-space realization of the controlled object was calculated. The H∞controller was obtained by solving algebraic Riccati equations. Compared with the traditional PI controller, the simulations verify that the controller has strong robustness about parameters variations and grid disturbances.

关 键 词：光伏并网逆变器 参数不确定 电网干扰 H∞控制 鲁棒性 

分 类 号：TM615[电气工程—电力系统及自动化]