MMC低桥臂电流峰值控制方法研究.pdfVIP

第 43 卷 第 13 期 中 国 电 机 工 程 学 报 Vol.43 No.13 Jul. 5, 2023 2023 年 7 月 5 日 Proceedings of the CSEE ©2023 Chin.Soc.for Elec.Eng. 5177 DOI ：10.13334/j.0258-8013.pcsee.220554 文章编号：0258-8013 (2023) 13-5177-15 中图分类号：TM 46 文献标识码：A MMC 低桥臂电流峰值控制方法研究 * 史先强，杨仁炘，方梓熙，蔡旭，刘黎，饶芳权 ( 电力传输与功率变换控制教育部重点实验室(上海交通大学) ，上海市 闵行区 200240) Research on the Control Method for MMC With Low Arm Current Peak * SHI Xianqiang, YANG Renxin, FANG Zixi, CAI Xu , LIU Li, RAO Fangquan (Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Minhang District, Shanghai 200240, China) ABSTRACT: In the conventional circulating current control 确性，并从电流应力、功率处理能力及换流站损耗等方面对 strategy of the MMC, the circulating current is usually 两种环流注入策略进行分析和比较，给出不同场景下的推荐 suppressed to zero to reduce system loss. However, circulating 方案。针对所提策略的仿真与硬件在环实验结果表明，所提 current injection also provides benefits. This paper explores 策略可将运行在较高功率因数下的 MMC 桥臂电流峰值减 methods to reduce the arm current peak of the MMC based on 小 25%左右，利于其短时间过载运行。 second-order and fourth-order circulating current injection. 关键词：模块化多电平变换器；环流注入控制；桥臂电流； Two circulating current injection schemes are proposed: one 电流应力；电容电压纹波；功率损耗 can minimize the arm current peak but increases the sub-module capacitance. The other compromises decreasing 0 引言 the arm current peak with increasing the capacitor voltage