电源学报2017，Vol.15Issue(1)：49-54,6.DOI:10.13234/j.issn.2095-2805.2017.1.49
一种单相MMC预充电控制策略
A Pre-charging Control Scheme for a Single-phase Modular Multilevel Converter
摘要
Abstract
Pre-charging control scheme for a modular multilevel converter(MMC) can be generally divided into two stages, viz., the uncontrolled rectifying and voltage boosting. Voltage boosting control scheme of three-phase MMC is mature. However, different from the three-phase MMC, single-phase has exclusive capacitor in the dc bus. As a result, voltage boosting stage of single-phase MMC has to take both the sub-module capacitor and dc bus capacitor into consideration, and has become an obstacle for single-phase MMC. This paper presents a pre-charging scheme for a single-phase half-bridge sub-module(HBSM)-based MMC. The uncontrolled rectifying stage is also adopted. The sum and the difference of energy between the upper and lower arms are controlled to realize the voltage boosting of sub-modules. Moreover, the dc bus capacitors are charged to the rated voltage value by the rest energy flowing from the AC side. This control scheme can make the starting process rapidly, smoothly and stably, which is of great value for a single-phase MMC operating as a rectifier. A prototype of a single-phase MMC with 8 sub-modules per arm was built to demonstrate the effectiveness and validity of the proposed control scheme.关键词
单相MMC/预充电控制/直流母线电容/boost升压Key words
single-phase modular multilevel converter(MMC)/pre-charging control scheme/dc bus capacitor/voltage boosting分类
信息技术与安全科学引用本文复制引用
何震,林磊,林艺哲,李昂..一种单相MMC预充电控制策略[J].电源学报,2017,15(1):49-54,6.基金项目
国家重点基础研究发展计划（973计划）资助项目（2014 CB247400）Project Supported by National Basic Research Program of Chi-na （）
