• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2017, Vol. 38 ›› Issue (8): 95-.doi: 10.3969/j.issn.1000-7229.2017.08.013

• 运行与控制技术 • 上一篇    下一篇

 一种适用于LCC-LCC+FBMMC串联混合型直流输电系统的启动策略

 陆翌1,赵剑2,裘鹏1,宣佳卓1,郭春义2,刘炜2

 
  

  1.  (1.国网浙江省电力公司电力科学研究院,杭州市 310014分号
    2.新能源电力系统国家重点实验室(华北电力大学),北京市 102206)
     
  • 出版日期:2017-08-01
  • 作者简介:陆翌(1979),男,博士,高级工程师,主要研究方向为高压直流输电、柔性直流输电和大功率电力电子技术分号 赵剑(1993),男,硕士研究生,主要研究方向为高压直流输电和柔性直流输电技术分号 裘鹏(1985),男,高级工程师,主要研究方向为高压直流输电和柔性直流输电技术分号 宣佳卓(1986),男,中级工程师,主要从事直流输电控制保护试验方面的研究工作分号 郭春义(1984),男,博士,副教授,主要研究方向为直流输电技术分号 刘炜(1991),男,博士研究生,主要研究方向为直流输电技术。
  • 基金资助:
     

 Start-Up Strategy for LCC-LCC and FBMMC Series Based Hybrid HVDC System
 

 LU Yi1, ZHAO Jian2, QIU Peng1, XUAN Jiazhuo1, GUO Chunyi2, LIU Wei2

 
  

  1.  (1. State Grid Zhejiang Electric Power Corporation Research Institute, Hangzhou 310014,China分号2. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),   Beijing 102206, China)
     
  • Online:2017-08-01
  • Supported by:
     

摘要:  摘要:文章中的串联混合型直流输电系统的整流侧采用电网换相换流器(line commutated converter, LCC),逆变侧采用LCC与全桥型模块化多电平换流器(full bridge submodule based modular multilevel converter, FBMMC)。首先,建立了该混合型直流输电系统的数学模型,为了保证系统的安全稳定启动,设计了相应的协同控制策略,并提出了一种适用于整流侧采用LCC与逆变侧采用LCC与FBMMC(line commutated converter-full bridge submodule based modular multilevel converter,LCC-LCC+FBMMC)的串联混合型直流输电系统的3阶段启动策略:第1阶段,先将整流和逆变侧的LCC闭锁,逆变侧的FBMMC带限流电阻进行不控充电以建立部分直流电压;第2阶段,将限流电阻旁路,并解锁逆变侧FBMMC,在定直流电压控制器作用下使FBMMC直流电压充电至额定值;第3阶段,解锁两侧的LCC,在整流侧定直流电流和逆变侧定直流电压控制器作用下,系统直流电流和直流电压逐渐上升至额定值,至此启动过程完成。最后,在PSCAD/EMTDC仿真环境下建立LCC-LCC+FBMMC串联型混合直流输电系统的仿真模型,验证了所设计的混合直流输电系统启动策略的有效性。

 

关键词:  混合型直流输电系统, 电网换相换流器(LCC), 全桥型模块化多电平换流器(FBMMC), 全桥子模块(FBSM), 启动策略

Abstract:  ABSTRACT:  This paper proposes a series hybrid HVDC system, whose rectifier side adopts the line commutated converter (LCC),and the inverter side is composed by LCC in series with the full bridge submodule based modular multilevel converter (FBMMC). Firstly, we construct the mathematical model of the hybrid HVDC system, design the corresponding coordinated control strategy to ensure the safe and stable start-up of the system, and proposes a three step start-up procedure for the hybrid HVDC system with LCC in rectifier side and LCC in series with FBMMC in inverter side (LCC-LCC+FBMMC). Phase 1, both the LCC and FBMMC are locked, and the DC side voltage charging process of FBMMC is uncontrolled with a current limit resistor in series. Phase 2, the current limit resistor is in bypass and FBMMC in inverter side is unlocked; the rated DC voltage of FBMMC is gradually built with the DC voltage controller. Phase 3, both the LCCs in the two sides are unlocked, and the rated DC current and DC voltage are gradually built by the DC current controller in rectifier side and DC voltage controller in inverter side. So far, the start-up process is completed. Finally we establish the simulation model for LCC-LCC+FBMMC based hybrid HVDC system in the PSCAD/EMTDC, and verify the effectiveness of the proposed start-up strategy for hybrid HVDC system.

 

Key words: hybrid HVDC system, line commutated converter (LCC), full bridge submodule based modular multilevel converter (FBMMC), full bridge sub module(FBSM), start strategy

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