模糊变结构控制的光伏并网功率调节系统  

Photovoltaic grid-connected power conditioning system based on fuzzy sliding mode variable-structure control

作　　者：季延娥 孙玉坤[1] 蔡纪鹤[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《电工电能新技术》2014年第12期20-23,59,共5页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金(61074019);江苏高校优势学科建设工程(苏政办发[2011]6号);江苏省普通高校研究生科研创新计划(CX10B_267Z;CXZZ12_0686)资助项目

摘　　要：光伏并网功率调节系统(PVPCS)集并网发电、无功补偿和谐波抑制为一体,对改善电能质量、减少功率损耗和提高系统利用率有重要作用。在分析了系统工作原理、瞬时无功检测、并网电流合成以及并网电流跟踪控制的理论基础上,研究了基于模糊变结构控制的PVPCS的设计方法。针对含PVPCS的单机无穷大系统进行电力系统暂态仿真,与常规PI控制进行比较验证。研究结果表明:该系统在光伏并网发电的同时能够快速稳定直流侧电容电压,有效抑制电网谐波,很好地对无功进行补偿,具有较强的鲁棒性和适应性,提高了系统利用率。When integrated with the function of active power output,harmonic and reactive power compensation,PV grid-connected power conditioning system （PVPCS） is helpful to improve power quality and efficiency of the system.Its working principle and instantaneous reactive power theory are analyzed.Combination of grid-connected current and current tracking is also discussed.PVPCS based on fuzzy sliding variable-structure control （FSMC） is studied and the transient simulation in single machine infinite bus system is compared with traditional PI control.Research results show that this system can effectively optimize the reactive and harmonic compensation while stabilizes the DC capacitor voltage and with better robustness and adaptability.Efficiency of the system is improved.

关 键 词：谐波分析 无功补偿 模糊变结构控制 光伏并网 

分 类 号：TM615[电气工程—电力系统及自动化]