电工技术学报2017，Vol.32Issue(9)：80-91,12.
新型牵引供电系统直流侧二次波动分析与抑制
Analysis and Suppressing DC-Side Twice Ripples of a Novel Traction Power Supply System
摘要
Abstract
To solve the problems of power quality and split section that exist in the traditional traction power supply system (TPSS),a novel TPSS that based on the modular nultilevel converter multi terminal high voltage direct current (MMC-MTDC) was introduced.The issue of double frequency ripples in the DC voltage/current which appears in the novel TPSS was analyzedand it was caused by two reasons;One reason is the circulating current of single-phase H bridge MMC (SPH-MMC) flow into the DC network.Another is a zero sequence voltage component existing in the bridge voltage of three-phase MMC in unbalanced grid condition.To suppress the double frequency fluctuation,a circulating current suppressing controller based on the quasi proportional resonant (quasi-PR) regulator and the second order generalized integrator (SOGI) filter was design for SPHMMC;And a controller without PLL and separate positive and negative sequence components of current was proposed for three-phase MMC,besides a DC voltage ripple suppressing control strategy based on the voltage compensation was proposed.Finally,a three terminal single-phase to three-phase MMC-MTDC simulation model was built to support the theoretical analysis and proposed control schemes.关键词
多端直流输电/牵引供电系统/模块化多电平换流器/二倍频波动Key words
Multi-terminal direct current (MTDC)/traction power supply system/modular multilevel converter (MMC)/double frequency fluctuations分类
信息技术与安全科学引用本文复制引用
宋平岗,吴继珍,董辉..新型牵引供电系统直流侧二次波动分析与抑制[J].电工技术学报,2017,32(9):80-91,12.基金项目
国家自然科学基金项目资助(51367008). （51367008）
