摘要
采用单相两级式光伏并网拓扑结构,针对传统双闭环控制策略,在光伏电池输入功率发生骤变时,响应滞后,系统稳定性较差的缺点,采用带有输入功率前馈的双闭环控制策略,并对其进行详细地分析。通过上述的分析,基于MATLAB平台,分别就两种策略搭建了光伏并网系统的仿真模型。仿真结果表明,当输入功率发生突变时,相对于传统双闭环控制策略,带有功率前馈的双闭环控制策略,其并网电流能够更快地达到新的稳定,同时降低了直流母线电压在该过程中的波动,具有更优越的动态性能。
On the basis of the two-stage single-phase PV grid-connected topology, the slow response and low stability of the traditional double-closed loop control strategy which occur when the PV input power changes suddenly, are analyzed in detail using the power feed-forward double-closed loop control strategy. According to the analysis, two simulation models of the PV grid-connected system with two different control strategies are built in the MATLAB platform. The results show that the control strategy with input power feed-forward has more excellent dynamic response in the respects of the output current and DC-BUS voltage.
出处
《电网与清洁能源》
2013年第8期75-78,共4页
Power System and Clean Energy
关键词
并网逆变器
双闭环
功率前馈
电网电压前馈
系统仿真
grid-connected inverter
double-closed loop
power feed-forward
voltage feed-forward of power grid
system simulation
