并网光伏逆变器效率变化特征及其模型研究  

Characteristics Analysis and Modeling Research on Efficiency of PV Grid Connected Inverter

作　　者：陈正洪 李芬 王丽娟 唐俊 白永清 代倩[3] 

机构地区：[1]湖北省气象服务中心,湖北武汉430074 [2]湖北省气象能源技术开发中心,湖北武汉430074 [3]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《水电能源科学》2011年第8期124-127,共4页Water Resources and Power

基　　金：科技部2010年度公益性行业(气象)科研专项基金资助项目(GYHY201006036);华中区域气象中心科技发展基金资助重点项目(QY-Z-201010)

摘　　要：为建立和检验并网光伏逆变器AC／DC转换效率模型，基于瞬时转换效率，采用华中科技大学18kw并网光伏电站2010年1～12月电量资料，从时次和能量角度统计了逆变器转换效率的基本特征，并应用指数曲线分月模型模拟AC／DC转换效率，评估了拟合精度与应用价值。结果表明，该模型可作为并网光伏电站发电功率或发电量预测的修正项，早晚、阴雨天的发电功率预测精度显著提高。For establishing AC/DC conversion efficiency model of PV grid connected inverter （GHI）, based on in- stantaneous conversion efficiency, the monthly energy data in 2010 of a 18 kW photovoltaic station in Huazhong Universi- ty of Science and Technology are used to analyze the basic characteristics of GHI conversion efficiency from the aspect of times and energy. And then, the AC/DC conversion efficiency is simulated with exponential curve monthly model. Final- ly, the fitting precision and applied value are evaluated; The results show that the proposed model can be used for short- term power prediction or the calculation the total power generation of grid connected PV system and can improve the pre- diction accuracy under the condition of morning, evening and cloudy and rainy day.

关 键 词：并网 光伏电站 逆变器 效率 变化规律 静态 非线性 

分 类 号：TM615[电气工程—电力系统及自动化]