摘要
介绍了一种基于模糊控制的光伏并网逆变系统的设计。相较传统的线性控制策略,模糊控制在应用场合变化及逆变系统自身的非线性方面具有更好的鲁棒性与稳定性。系统由DSP控制,通过电压、电流采样和过零检测电路获取电压、电流信号及过零点。并网模式下,采用滤波电感电流误差量及输出滤波电感电压作为模糊控制量。独立模式下选取输出电压的误差量及滤波电感电压作为输入及控制变量,同时运用数字锁相实现独立运行时逆变器输出跟踪电网电压。
A design of PV inverter is introduced based on fuzzy control.Compared to traditional linear control strategy, fuzzy control has better robustness and stability in the non-linear inverter system.System consists of DSP control, voltage, current signal and a zero point can be got through the voltage, current sampling and zero crossing detection circuit.In grid-connected mode,the error amount of the filter inductor current and output filter inductor voltage are chosen as the amount of fuzzy control.In stand-alone mode,the error amount of the output voltage and filter inductor voltage are selected as the input and control variables, while digital phase-locked is used to track the grid voltage.
出处
《电力电子技术》
CSCD
北大核心
2013年第2期50-52,共3页
Power Electronics
基金
国家自然科学基金(611061107)~~
关键词
逆变器
模糊控制
并网
inverter
fuzzy control
grid-connected
