引用本文: | 李兴鹏,石庆均,江全元.双模糊控制法在光伏并网发电系统MPPT中的应用[J].电力自动化设备,2012,32(8): |
| LI Xingpeng,SHI Qingjun,JIANG Quanyuan.Application of double fuzzy control in MPPT of grid-connected photovoltaic generation system[J].Electric Power Automation Equipment,2012,32(8): |
|
摘要: |
提出一种在光伏并网发电系统中进行最大功率点跟踪(MPPT)的双模糊控制法,将非对称模糊MPPT与模糊PID相结合,在设定参考电压环节使用模糊控制代替诸如扰动观察法等传统方法,在消除实际电压与参考电压偏差这一环节用模糊PID替换普通的PID控制。此外,还提出了4个反映MPPT性能的指标:环境缓慢变化时的MPPT时间、光伏阵列发出的能量大小、稳态时的功率波动大小和环境剧烈变化时光伏阵列发出的能量大小。设计了4个算例,在MATLAB/Simulink环境下对5种控制方法分别进行了仿真分析。通过对比各方法的性能指标和相应的输出功率波形图,验证了所提出的双模糊控制法是一种比传统方法更优的 MPPT控制方法。 |
关键词: 光伏 发电 最大功率点追踪 模糊控制 非对称模糊MPPT 模糊PID |
DOI: |
分类号: |
基金项目:国家高技术研究发展计划(863计划)资助项目(2009AA05Z221);浙江省科技计划项目(2009C34013);浙江省自然科学基金资助项目(R1080089) |
|
Application of double fuzzy control in MPPT of grid-connected photovoltaic generation system |
LI Xingpeng, SHI Qingjun, JIANG Quanyuan
|
College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China
|
Abstract: |
The double fuzzy control is proposed for the MPPT(Maximum Power Point Tracking) of grid-connected photovoltaic generation system,which combines asymmetric fuzzy MPPT and fuzzy PID together. The conventional method such as perturbation-observation is replaced by the asymmetric fuzzy control in the reference voltage setting section and the general PID control is replaced by the fuzzy PID control in the actual-reference voltage deviation elimination section. Four MPPT performance indexes are proposed: tracing time when environment changes slowly,power output of photovoltaic array,steady-state power fluctuation,and power output of photovoltaic array when environment changes greatly. Four cases are designed and five control methods are respectively simulated in the environment of MATLAB/Simulink. The comparison of the indexes of MPPT performance and the waveform of output power verifies that,the proposed double fuzzy control method is better than the traditional methods. |
Key words: photovoltaic electric power generation maximum power point tracking fuzzy control asymmetric fuzzy MPPT fuzzy PID |