摘要
针对光照强度变化的不确定性、光伏电池阵列温度变化、负载变化和光伏电池强非线性,使光伏电池阵列的最大功率点变化的情况,提出一种采用模糊参数自校正比例、积分、微分(PID)控制实现光伏系统最大功率点跟踪(MPPT)控制的方法。Boost变换器属于并联开关变换器,采用Boost变换器实现MPPT。模糊参数自校正PID控制方法能合理地处理好控制精度和速度的矛盾。论述了模糊参数自校正PID控制器的结构、参数确定、规则的生成、模糊决策与推理。仿真结果表明所提方法可有效消除最大工作点处的振荡现象且易于实现,提高了系统的稳定性。
As the maximum power point of photovoltaic cell varies with the sunhght intensity,panel temperature and according to its strong non- linearity ,fuzzy parameter self-tuning PID controller is proposed to realize its MPPT（Maximum Power Point Tracking）,which balances control precision and control speed reasonably. Boost converter,a kind of parallel on- off converter,is employed. The controller structure,parameter definition,control rule generation,fuzzy decision making and reasoning are discussed. Simulation results show that ,the proposed method effectively eliminates the concussion at maximum power point and improves system stability.
出处
《电力自动化设备》
EI
CSCD
北大核心
2008年第3期55-58,共4页
Electric Power Automation Equipment
基金
华北电力大学重大预研基金项目(200613003)~~
