基于LCC的高压直流输电换流站无功功率控制策略研究  

Research on the Reactive Power Control Strategy of HVDC Converter Station Based on LCC

作　　者：袁小威 王金梅 苗海东 马文涛 YUAN Xiaowei;WANG Jinmei;MIAO Haidong;MA Wentao(School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan 750021,Ningxia,China)

机构地区：[1]宁夏大学物理与电子电气工程学院,宁夏银川750021

出　　处：《电气传动》2021年第13期14-19,共6页Electric Drive

基　　金：宁夏自然科学基金(2019AAC03027);宁夏回族自治区重点研发计划项目(2018BFH03004)。

摘　　要：针对高压直流输电换流站采用投切无功设备控制无功功率导致交流系统与换流站之间存在无功功率交换量的问题,在此基础上提出了以直流电流为主控制量,无功功率交换量和无功设备提供的无功偏差量为反馈量的控制策略。通过计算额定功率下换流站的无功功率消耗量,投切无功设备补偿换流站所需的无功功率,加入提出的控制策略,使其无论是欠补偿还是过补偿,均可实现交流系统与换流站间无功功率零交换。通过电磁暂态仿真软件(PSCAD/EMTDC)仿真研究分析,验证了该控制策略的有效性和合理性。In view of the problem of reactive power exchange between AC system and converter station caused by switching reactive power equipment to control reactive power in HVDC transmission converter station,a control strategy based on DC current as the main control quantity,reactive power exchange quantity and reactive power deviation provided by reactive power equipment as the feedback quantity was proposed.By calculating the consumption of reactive power at the converter station under the rated power,the switching reactive power equipment can compensate the reactive power required by the converter station,and the proposed control strategy was added to realize the zero exchange of reactive power between the AC system and the converter station no matter it is under compensated or overcompensated.The simulation of electromagnetic transient simulation software(PSCAD/EMTDC)verifies the effectiveness and rationality of the control strategy.

关 键 词：高压直流输电换流站 直流电流 无功功率 零交换 

分 类 号：TM721[电气工程—电力系统及自动化]