Adaptive Voltage Coordinated Control Method of Receiving End Hybrid LCC-MMC HVDC

MA Wenxuan; LI Bin; WANG Yizhen; CHEN Zhengguang; ZHOU Zexin; LI Qingquan

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Adaptive Voltage Coordinated Control Method of Receiving End Hybrid LCC-MMC HVDC

更新时间：2025-12-08

- Adaptive Voltage Coordinated Control Method of Receiving End Hybrid LCC-MMC HVDC
- Vol. 47, Issue 12, Pages: 4518-4527(2021)
- 作者机构：
  
  1. 智能电网教育部重点实验室(天津大学)
  2. 电网安全与节能国家重点实验室(中国电力科学研究院有限公司)
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 December 2021，
  
  Published：2021
- 稿件说明：
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MA Wenxuan, LI Bin, WANG Yizhen, et al. Adaptive Voltage Coordinated Control Method of Receiving End Hybrid LCC-MMC HVDC[J]. 2021, 47(12): 4518-4527.
DOI：

MA Wenxuan, LI Bin, WANG Yizhen, et al. Adaptive Voltage Coordinated Control Method of Receiving End Hybrid LCC-MMC HVDC[J]. 2021, 47(12): 4518-4527. DOI：

摘要

受端混联型LCC-MMC直流输电系统是一种在整流侧采用电网换相换流器(linecommutatedconverter

LCC)

逆变侧采用高压阀组LCC和低压阀组模块化多电平换流器(modular multilevel converter

MMC)相串联的混合直流输电系统。当送端交流网侧电压跌落时

整流侧LCC直流电压减小

将会影响整个系统功率的传输。为此

分析了送端交流侧电压不同跌落程度对受端混联型直流输电系统运行特性的影响。在逆变侧MMC电压控制及LCC低压限流的基础上

优化了混联直流输电系统的电压协调控制逻辑

实现低压阀组MMC在正常运行状态与降压运行状态之间进行自适应切换。通过在PSCAD/EMTDC中建立受端混联型直流输电系统模型并进行仿真

结果表明

所提出的自适应电压协调控制方法能够提高受端混联型直流输电系统在送电端低电压状态时的传输功率。

Abstract

The receiving end hybrid LCC-MMC HVDC transmission system uses line commutated converter（LCC） at the rectifier side

and LCC and modular multilevel converter（MMC） are connected in series at the inverter side. When the AC voltage at sending end falls

the DC voltage of the rectifier side will be reduced which affects the power transmission of the system. In this paper

the influences of different levels of the AC voltage sag at sending ends on the operating characteristics of DC transmission system at receiving ends are analyzed

and a voltage coordination control logic of the hybrid system is optimized based on the cooperation of MMC voltage control and VDCOL. Thereby

MMC switch between the normal operating state and the voltage-reduced operating state can be realized adaptively. The results of modeling and simulation of receiving end hybrid HVDC transmission system on the PSCAD/EMTDC indicate that the proposed adaptive voltage coordinated control method can be adopted to increase the transmission power of the DC system during low voltages.

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