| 引用本文: | 夏冰,李耀华,李子欣,徐飞,高范强.基于PWM-CSC的混合直流输电系统电网故障穿越策略[J].电力自动化设备,2019,39(11): |
| XIA Bing,LI Yaohua,LI Zixin,XU Fei,GAO Fanqiang.Research of grid fault ride-through strategy for PWM-CSC based hybrid HVDC transmission system[J].Electric Power Automation Equipment,2019,39(11): |
|
| 本文已被：浏览 4010次 下载 2006次 |
|
|
|
| 基于PWM-CSC的混合直流输电系统电网故障穿越策略 |
|
夏冰1,2,3, 李耀华1,2,3, 李子欣1,2,3, 徐飞1,2,3, 高范强1,2,3
|
|
1.中国科学院 电力电子与电气驱动重点实验室，北京 100190;2.中国科学院 电工研究所，北京 100190;3.中国科学院大学 电子电气与通信工程学院，北京 100049
|
|
| 摘要: |
| 研究了一种整流侧采用传统电网换相换流器(LCC)、逆变侧采用脉宽调制型电流源换流器(PWM-CSC)的混合直流输电系统。为了降低开关频率和提高系统故障响应性能，提出了电网正常运行时采用特定谐波消除法(SHE)调制和电网故障时切换为正弦脉宽调制(SPWM)的调制策略。分析了电网故障情况下逆变侧(PWM-CSC)在αβ两相静止坐标系下的数学模型，提出了一种基于比例谐振控制器的控制策略并对控制器参数进行了设计，实现了负序电网电流的抑制和单位功率因数运行。此外，给出了电网故障情况下系统传输的最大有功功率的计算方法。在PSCAD/EMTDC中搭建了400 kV/1250 MW的单极混合直流输电系统仿真模型。仿真结果验证了所提控制策略的正确性和有效性。 |
| 关键词: 混合直流输电 脉宽调制型电流源换流器 脉冲宽度调制 比例谐振控制器 最大传输功率 负序电流抑制 单位功率因数 |
| DOI：10.16081/j.epae.201908038 |
| 分类号:TM721.3 |
| 基金项目:国家自然科学基金资助项目(51507167) |
|
| Research of grid fault ride-through strategy for PWM-CSC based hybrid HVDC transmission system |
|
XIA Bing1,2,3, LI Yaohua1,2,3, LI Zixin1,2,3, XU Fei1,2,3, GAO Fanqiang1,2,3
|
|
1.Key Laboratory of Power Electronics and Electric, Chinese Academy of Sciences, Beijing 100190, China;2.Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;3.College of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
|
| Abstract: |
| A hybrid HVDC(High Voltage Direct Current) transmission system adopting LCC(Line Commuta-ted Converter) on rectifier side and PWM-CSC(Pulse Width Modulated-Current Source Converter) on inver-ter side is researched. To achieve low switching frequency and improve fault response performance, the SHE(Selective Harmonic Elimination) modulation strategy is adopted under normal state and the modulation method is switched to SPWM(Sinusoidal PWM) under grid fault state. The α-β stationary reference frame based mathematical model of the proposed system is deduced under grid fault state and a PR(Proportional Resonant) controller to eliminate the negative-sequence grid current and realize unity power factor operation is proposed. The PR parameters are designed. Besides, the calculation of the maximum transmission power under grid fault state is presented. Finally, a simulation model of 400 kV/1250 MW unipolar hybrid HVDC transmission system is built by PSCAD/EMTDC. The simulative results verify the correctness and effectiveness of the proposed control method. |
| Key words: hybrid HVDC power transmission PWM-CSC PWM PR controller maximum power transmission negative-sequence grid current elimination unity power factor operation |
