摘要
三相电压源型PWM整流器交流侧每相通过LCL滤波器代替单电感滤波器接入电网,可以由较小的电感电容达到较好的滤波效果。但是电容支路的引入,将使传统的控制策略很难达到优良的控制效果。本文以三相电压源型PWM整流器为例给出了LCL滤波器的数学模型,并对基于LCL滤波器三相电压源型PWM整流器的直接功率控制、三闭环控制和无差拍控制的控制策略进行分析和比较。最后,展望了基于LCL滤波器的PWM整流器控制策略的研究热点和研究方向。
The use of a LCL-filter mitigates the switching ripples injected in the grid by a third order low-pass LCL-filter is better than an L filter. But the added capacitance spur track makes the control of the rectifier much more complex. So the control strategy for voltage-source converter connected to the grid through an LCL-filter began to be researched. The mathematical model of the rectifier connected to grid with an LCL-filter is shown in this paper and then some control strategies are introduced, such as vector control, three closed loops control, novel direct power control and dead-beat control. At last, the advantages and disadvantages of all this control strategies are discussed in this paper and the prospect research focus are given.
出处
《电工技术学报》
EI
CSCD
北大核心
2008年第1期90-96,共7页
Transactions of China Electrotechnical Society
