摘要
作为非线性直流电源,光伏阵列的理想运行状态是在最大功率点上输出稳定的直流功率,而单相并网发电系统的并网功率含有2倍于电网频率的交流量。针对单相光伏并网发电系统这种输入与输出特性的差异,综合研究了并网功率脉动对最大功率点跟踪特性、逆变器转换效率及并网电能质量的影响,通过理论分析、仿真计算和实验验证,比较不同电路拓扑的特性,提出了解耦电容的优化设计准则,提高了系统的运行效率,实现了产品设计的规范化。
As a nonlinear DC power source, a solar array should operate at the maximum power point with a stable DC power output. Otherwise, the power output of a single-phase grid connected system contains an AC component with double grid frequency. Corresponding to such difference of input and output characteristics in single-phase grid connected PV systems, the influences of power pulsation on maximum power point track- ing （MPPT）, transfer efficiency and power quality of inverter were synthetically studied. The comparison of different circuit topologies was made by theoretical analysis, computer simulation as well as experiment, and an optimal design rule of decoupling capacitors was proposed which can improve the system operating efficiency as well as standardize product design.
出处
《电气传动》
北大核心
2012年第10期44-49,共6页
Electric Drive
关键词
单相光伏并网发电系统
光伏阵列
并网逆变器
功率解耦
最大功率点跟踪
转换效率
single-phase grid-connected photovoltaic system
PV array
grid-tied inverter
power decou-pling
maximum power point tracking
transfer efficiency
