两级式PCS前级DC/DC变换器的控制策略研究  

Research on the Control Strategy of Two-stage PCS Pre-stage DC/DC Converter

作　　者：周成 魏业文[1,2] 李明 吴先用[1] ZHOU Cheng;WEI Ye-wen;LI Ming;WU Xian-yong(China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学,电气与新能源学院,湖北宜昌443002 [2]新能源微电网湖北省协同创新中心(三峡大学),湖北宜昌443002

出　　处：《电力电子技术》2024年第12期106-110,共5页Power Electronics

基　　金：国家自然科学基金面上项目(52377191)。

摘　　要：针对两级式储能变流器(PCS)前级DC/DC变换器比例积分(PI)控制动态响应慢、PCS并网电流谐波含量大的问题,提出一种基于两级式PCS的DC/DC变换器的连续集模型预测控制(CCS-MPC)策略。首先根据两级式PCS的工作原理,建立其前级DC/DC变换器和后级DC/AC变换器的数学模型。其次引入代价函数,设计出前级DC/DC的CCS-MPC,根据Lyapunov定理证明CCS-MPC策略的稳定性。最后经过仿真和实物验证,动态响应时间降低了约48.2%,并网电流总谐波畸变率(THD)减少了4.05%。In order to solve the problems of slow dynamic response and large harmonic content of power conversion system(PCS)grid-connected current in the proportion integral(PI)control of the pre-stage DC/DC converter of twostage energy storage converter,a continuous control set model predictive control(CCS-MPC)strategy for DC/DC converter based on two-stage PCS is proposed.Firstly,according to the working principle of two-stage PCS,the mathematical model of the pre-stage DC/DC converter and the post-stage DC/AC converter is established,and then the cost function is introduced to design the CCS-MPC controller of the pre-stage DC/DC.Secondly,the stability of the CCSMPC strategy is proved according to Lyapunov’s theorem.Finally,the dynamic response time is reduced by about 48.2%and the grid-connected current total harmonic distortion(THD)is reduced by 4.05%through simulation and physical verification.

关 键 词：两级式储能变流器 连续集模型预测控制 代价函数 

分 类 号：TM46[电气工程—电器]