一种基于通用信号延迟叠加算子的单相电网基波及谐波同步算法

发布时间：2019-02-22 07:51

【摘要】：如何在单相畸变电网中快速准确的获取基波以及所需的特定次谐波信息,对并网型电力电子变换器的控制系统而言是十分重要的。针对这一问题,提出了一种基于通用信号延迟叠加算子(generalized delayed signal superposition operator,GDSS)的单相锁相环结构,用于恶劣电网下系统基波以及多重谐波信息的检测。这种锁相环结构包含了多个具有很强频率选择特性的GDSS算子,能够在半个基波周期内从输入信号中分离出所需要的基波以及多个谐波频率信息,并且其参数以及GDSS算子个数还能够根据实际控制系统需求灵活调整。在各种工况下的仿真及实验表明,所提的锁相方法能够在恶劣电网下快速准确的获取基波及多重谐波信息,并且面对电网常见扰动时具有很强的鲁棒性。
[Abstract]:It is very important for the control system of grid-connected power electronic converters to obtain the fundamental wave and the specific sub-harmonic information quickly and accurately in single-phase distorted power grid. In order to solve this problem, a single-phase phase-locked loop (PLL) structure based on the universal signal delay superposition operator (generalized delayed signal superposition operator,GDSS) is proposed, which can be used to detect the fundamental and multi-harmonic information of the system in a bad power network. This PLL structure contains several GDSS operators with strong frequency selection characteristics, and can separate the required fundamental and harmonic frequency information from the input signal in half a fundamental period. And the parameters and the number of GDSS operators can be adjusted flexibly according to the actual control system requirements. The simulation and experiments under various operating conditions show that the proposed phase-locked method can quickly and accurately obtain the basic and multiple harmonic information under the adverse power grid and has strong robustness in the face of the common disturbances of the power network.
【作者单位】：西安交通大学电气工程学院;中国船舶重工集团公司第705研究所;
【基金】：国家自然科学基金项目(51277146)~~
【分类号】：TM711

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