摘要
提出了一种新型可调度型并网发电系统,在同一套逆变装置上通过改变控制算法实现并网发电或独立发电。并网运行模式时,利用导抗变换器电压源-电流源变换特性,实现了光伏系统电流型并网,同时提出了一种新型三角波-三角波调制方法。该方法不仅可以减小系统体积、降低系统成本,而且具有并网电流谐波含量低、功率因数高、控制简单等优点。独立运行模式时,在不增加硬件的前提下,通过改变控制算法,可输出稳定的220V交流电压,实现了电压型独立发电。由于通过高频变换传输功率,因而减小了隔离变压器及输出滤波器中电感的体积,更加有利于降低成本,实现装置的小型化。
A novel photovohaic grid-connected inverter system is proposed.Grid-connected and stand-alone operation modes were realized individually based on one set of equipment with different algorithm.Under grid-connected operation mode,PV current-source operation was implemented by making use of characteristics of immittance converter.At the same time,a novel triangle -triangle modulation method is proposed,which has advantages of small equipment volume,low cost, and harmonics, as well as high power factor and simple control method.While under stand-alone operation mode, voltagesource operation was implemented by means of altering algorithm to achieve stable 220V AC vohage.The novel inverter has advantages of small volume and low cost due to the energy, is transferred through high frequency conversion.
出处
《电力电子技术》
CSCD
北大核心
2007年第11期15-17,共3页
Power Electronics
基金
受教育部博士点基金(20060280018)
上海市教委重点科研基金(06ZZ03)
台达电力电子科教发展基金(DREO2006017)
上海大学研究生创新基金~~
关键词
逆变装置
太阳能发电/并网运行
独立运行
inverter
solar energy power generation / grid-connection
stand-alone operation
