基于附加电压平衡器的可再生能源直流制氢装置接地环流抑制方法  

The Suppression Method of Grounding Circulating Current for Renewable Energy DC Hydrogen Production Unit Based on Additional Voltage Balancer

作　　者：张学[1,2] 裴玮 谭建鑫[3] 张清清 许佳玮 ZHANG Xue;PEI Wei;TAN Jianxin;ZHANG Qingqing;XU Jiawei(Institute of Electrical Engineering,Chinese Academy of Sciences,Haidian District,Beijing 100190,China;University of Chinese Academy of Sciences,Shijingshan District,Beijing 100049,China;China Suntien Green Energy Co.,Ltd,Shijiazhuang 050051,Hebei Province,China)

机构地区：[1]中国科学院电工研究所,北京市海淀区100190 [2]中国科学院大学,北京市石景山区100049 [3]新天绿色能源股份有限公司,河北省石家庄市050051

出　　处：《中国电机工程学报》2021年第17期5936-5946,共11页Proceedings of the CSEE

基　　金：中国科学院洁净能源先导科技专项(XDA 21050100);中国科学院前沿科学重点项目(QYZDB-SSW-JSC024)。

摘　　要：针对多台制氢装置并联运行接地环流问题,该文提出附加电压平衡器硬件解决方案,将接地环流抑制问题转化为输入和输出电压中点平衡控制问题。建立碱式电解槽、三相交错并联变换器以及电压平衡器的数学模型。针对采用传统下垂控制的电压平衡器输出正极和负极电压存在偏差问题,提出分布式二层控制。为了提升系统电能质量和动态响应速度,在电压平衡器和三相交错并联变换器小信号控制模型的基础上分别提出输出中线电流和输入/输出电压前馈控制策略。最后,搭建仿真模型和基于RT-LAB硬件在环实验平台,对所提出算法和传统方法进行仿真和实验研究。仿真与实验结果验证所提出控制策略的有效性和可行性。Aiming at the problem of grounding circulating current in parallel operation of multiple hydrogen production units, a hardware solution of additional voltage balancer was proposed. The problem of grounding circulation suppression was transformed into the problem of neutral point balance control of input and output voltage. The mathematical models of alkaline electrolyzer, three-phase interleaved parallel converter and voltage balancer were established. A distributed two-layer control was proposed to solve the deviation problem between the positive pole and negative pole output voltage of voltage balancer with traditional droop control. In order to improve the power quality and dynamic response speed of the system, the output neutral current and input/output voltage feedforward control strategies were proposed respectively based on the small signal control model of voltage balancer and three-phase interleaved parallel converter. Finally, simulation model and hardware in the loop experimental platform were built, and the proposed algorithm and traditional method were carried out in simulation model and experimental platform. The effectiveness and feasibility of the proposed control strategy were verified by simulation and experimental results.

关 键 词：制氢装置 电压平衡器 接地环流 中点平衡控制 前馈控制 

分 类 号：TM71[电气工程—电力系统及自动化]