| 应用于MMC-HVDC控制器的改进软件锁相环 |
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| 引用本文： | 郭敏,赵成勇,张宝顺,刘兴华,翟晓萌.应用于MMC-HVDC控制器的改进软件锁相环[J].南方电网技术,2012,6(6):81-85. |
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| 作者姓名： | 郭敏 赵成勇 张宝顺 刘兴华 翟晓萌 |
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| 作者单位： | 华北电力大学 新能源电力系统国家重点实验室，北京 昌平区102206;华北电力大学 新能源电力系统国家重点实验室，北京 昌平区102206;华北电力大学 新能源电力系统国家重点实验室，北京 昌平区102206;华北电力大学 新能源电力系统国家重点实验室，北京 昌平区102206;华北电力大学 新能源电力系统国家重点实验室，北京 昌平区102206 |
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| 基金项目： | 国家自然科学基金项目(51177042)；“十一五”国家科技支撑计划重大项目(2010BAA01B01 |
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| 摘 要： | 分析了在三相电压不对称情况下传统软件锁相环相位输出产生误差的原因，提出一个改进的单同步坐标变换软件锁相环方法，即通过筇坐标变换，并延迟T／4周期计算来实现正、负序分量的分离，跟踪三相电压的正序分量以减小误差。基于RTDS搭建了MMC—HVDC一次系统模型，将改进软件锁相环应用于基于FPGA的MMC—HVDC控制器上，采用相关的控制和平衡策略，能有效地调节母线电压和有功功率，说明了改进软件锁相环相位输出的准确性。
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| 关 键 词： | 软件锁相环 模块化多电平电压源型高压直流输电 αβ坐标变换 正序分量 |
The Improved Software Phase-Locked Loop for Modular Multilevel Converter based HVDC |
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| GUO Min,ZHAO Chengyong,ZHANG Baoshun,LIU Xinghua and ZHAI Xiaoming.The Improved Software Phase-Locked Loop for Modular Multilevel Converter based HVDC[J].Southern Power System Technology,2012,6(6):81-85. |
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| Authors: | GUO Min ZHAO Chengyong ZHANG Baoshun LIU Xinghua and ZHAI Xiaoming |
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| Affiliation: | State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China;State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China;State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China;State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China;State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China |
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| Abstract: | Analyzing the phase output deviation cause of traditional software phase-locked loop （SPLL） under three-phase asymmetrical voltage, this paper puts forward an improved SPLL model using aft coordinate transform and T/4 shift calculation to realize the separation of the positive and negative sequence components and to track the positive one as to reduce the deviation. Modeling the primary system of modular multilevel converter based HVDC （MMC-HVDC） in RTDS, and using the improved SPLL to the MMC-HVDC controller based on FPGA, and adopting related control and balance strategies, it proves that the controller can effectively adjust the bus voltage and active power, showing that the accuracy of phase output with the improved SPLL is very good. |
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| Keywords: | traditional software phase-locked loop （SPLL） modular multilevel converter based HVDC （MMC-HVDC） αβ coordinate transform positive sequence component |
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