摘要
并网型逆变器是太阳能光伏并网发电的关键部件,提出的光伏并网逆变器通过LCL滤波器并入电网,采用非线性的电流滞环控制策略,建立光伏模块和LCL滤波器的数学模型,将基于电导增量算法的最大功率跟踪(MPPT)控制和有源阻尼算法集成在滞环控制系统中,实现了光伏模块最大功率输出,并有效抑制了LCL滤波器的自然谐振。提出了集成统一的电流滞环控制策略。仿真结果验证了光伏模块数学模型和MPPT算法的有效性,对光伏并网逆变器受外界环境变化影响的动态响应仿真表明,集成统一的电流滞环跟踪控制应用于光伏并网逆变器能改善注入电网的电流品质,提高系统的稳定性。
Grid-connected inverter is a key electrical element for solar photovoltaic grid-connected electricity generation. The photovohaic inverter is connected to power grid through LCL filter, and non-linear current hysteresis band scheme are adopted.Photovoltaie mathematical model and LCL filter model are build for simulative analysis, and maximum power point tracking （MPPT） control and active damping algorithm are integrated in the system control loop, thus the function of maximum power output of photovoltaie array and prohibit natural resonance of LCL filter are accomplished effectively,finally the integrated and unified current hysteresis control strategy is put forward.The simulative result indicates that the photovoltaic mathematical model and the algorithm of MPPT are valid,the dynamic response of grid-connected inverter which affected by climate condition change is simulated ,which reveals the integrated current hysteresis band control scheme applied in the photovoltaic grid-connected inverter can improve the grid＇s power quality and increase system stability. Ke
出处
《电力电子技术》
CSCD
北大核心
2009年第7期33-35,57,共4页
Power Electronics
基金
国家自然科学基金项目(50667002)
新疆大学青年科研启动基金(QN070136)~~
关键词
逆变器
滤波
光伏
最大功率跟踪
滞环控制
inverter
filter / photovohaic
maximum power point tracking
hysteresis band control
