电网技术2013，Vol.37Issue(3)：667-672,6.
基于相序解耦谐振控制器的基波正序电压相位检测方法
Phase Detection of Fundamental Positive Sequence Voltage Based on Sequence-Decoupled Resonant Controller
摘要
Abstract
In grid-connected inversion system,it is necessary to fast detect the phase information of positive-sequence component of grid voltage to implement the grid connection under unity power factor.However,there is the defect in traditional phase-locked loop (PLL) that when unsymmetrical fault occurs in power grid the detection accuracy of PLL is affected by negative-sequence component of grid voltage and it leads to inaccurate detection.A PLL detection technique based on sequence-decoupled resonant (SDR) controller,in which the SDR is used to separate positive-sequence component of grid voltage from unsymmetrical voltage to trace the phase of positive-sequence component,is proposed,thus the function of PLL is implemented.Both results of simulation and experiments show that under the conditions of unsymmetrical system voltage,varying system frequency and distortion of system voltage the proposed method can detect fundamental positive-sequence component of grid voltage quickly and effectively.关键词
并网发电系统/锁相环/相序解耦控制器/相位检测Key words
grid-connected generation system/ phase locked loop (PLL)/ sequence-decoupled resonant controller/phase detection分类
信息技术与安全科学引用本文复制引用
黄建明,吴春华,许富强..基于相序解耦谐振控制器的基波正序电压相位检测方法[J].电网技术,2013,37(3):667-672,6.基金项目
国家自然科学基金项目(51107079). （51107079）
Project Supported by National Natural Science Foundation of China (51107079). （51107079）
