基于MMC拓扑STATCOM综合控制策略研究  

A Study on the Integrated Control Scheme for the STATCOM Based on MMC Topology

作　　者：赵海伟[1] 秦海鸿[1] 马策宇 朱梓悦[1] 

机构地区：[1]南京航空航天大学自动化学院电气工程系,江苏南京210016

出　　处：《电气自动化》2016年第1期55-58,61,共5页Electrical Automation

基　　金：教育部博士点基金资助项目(20123218120017);南京航空航天大学研究生创新基地(实验室)开放基金资助项目(kfjj201466);南京航空航天大学青年科技创新基金(理工类)(NS2015039);江苏高校优势学科建设工程资助项目

摘　　要：针对基于模块化多电平变换器(Modular Multilever Converter,简称MMC)的静止同步补偿器(Static Synchronous Compensator,简称STATCOM)提出了一种综合控制策略。根据MMC-STATCOM在不同工作状态下的性能要求以及最近电平逼近调制(Nearest Level Modulation,简称NLM)和载波移相SPWM(Carrier Phase Shifted SPWM,简称CPS-SPWM)两种控制策略的不同特点,在不同工作阶段分别选择合适的控制策略。基于瞬时无功功率理论,通过在d轴和q轴上分别叠加有功分量和无功分量的方法,在恒频启动阶段采用最近电平逼近调制并在电压外环采用斜坡控制,实现子模块电容电压快速稳定上升,在稳态阶段采用载波移相SPWM的分级控制,实现稳态时系统具有较好的输出性能。最后,综合控制策略进行了实验验证。Perspective to the Static Synchronous Compensator （ STATCOM ） based on Modular Muhilevel Converter （ MMC ）, this paper presents an integrated control scheme. Based on performance requirements on MMC-STATCOM under different working conditions as well as different characteristics of two control strategies, namely the Nearest Level Modulation （ NLM ） and Carrier Phase Shifting SPWM { CPS-SPWM） , this paper selects appropriate control strategies for different working stages respectively. Based on the theory of instantaneous reactive power, by superimposing active component and reactive component on the d-axis and q-axis respectively, we use NLM in the constant-frequency startup phase and slope control in the outer voltage loop to realize rapid and stable rise of capacitor voltage in the sub-module. Moreover, we adopt CPS SPWM hierarchical control in the steady-state phase to ensure good output performance of the system in the steady state. Finally, experimental verification is completed for the proposed integrated control scheme.

关 键 词：MMC-STATCOM 最近电平逼近调制 载波移相SPWM 预充电 综合控制策略 

分 类 号：TM761[电气工程—电力系统及自动化]