%0 Journal Article
%T 基于模糊控制三电平Boost直流变换器输出电容均压方法<br> Output Capacitor Voltage Balance Control Method of Three-Level Boost DC-DC Converter Using Fuzzy Controller
%A 黄鹭
%A 方宇
%A 曹松银
%J Open Journal of Circuits and Systems
%P 56-66
%@ 2327-0861
%D 2019
%I Hans Publishing
%R 10.12677/OJCS.2019.8383008
%X <div style=\"text-align:justify;\">
	<span style=\"font-size:14px;\">本文针对应用于三相非隔离光伏并网发电逆变器中三电平Boost直流变换器启动建压过程时，可能出现的中点(Neural-Point, NP)电位不平衡问题和后级逆变电路调制策略对中点电位的影响，在三电平Boost直流变换器功率级提出了一种实现中点电位平衡的模糊控制策略。采用模糊控制器可自适应地改变三电平Boost直流变换器开关管的占空比大小，不仅在启动过程中(直流母线建压时)，而且在并网逆变器稳定工作时，都能实现直流侧输出电容的均压,并获得良好的动态和静态性能。论文中为三电平Boost直流变换器设计了模糊控制器，给出了控制规则。最后通过仿真和实验验证了该方法的可行性和可靠性。<br />
Aiming at the neutral-point (NP)
imbalance and the influence of the modulation strategy of the post-stage
inverters on the neutral-point potential when the three-level Boost DC
converter is used in the three-phase non-isolated grid-connected PV power
generation inverters to start the voltage-building process, a fuzzy control
strategy is proposed to realize the neutral-point potential balance at the
power level of the three-level Boost DC converter. The duty cycle ratio of the
switch of three-level Boost DC converter can be adaptively changed by using the
fuzzy controller. Not only in the start-up process (when the DC bus is
voltage-building), but also in the stable operation of grid-connected
inverters, the voltages across output capacitors can be equalized and good dynamic
and static performance is obtained. In this paper, a fuzzy controller is
designed for three-level Boost DC converter, and the control rules are given.
Finally, the feasibility and reliability of the method are verified by
simulation and experiment.</span> 
</div>
%K 三电平Boost直流变换器，中点电位平衡，模糊控制<br> Three-Level Boost Converter
%K Neutral-Point Potential Balance
%K Fuzzy Control
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=32161