摘要
为了提高新型电力系统电压畸变工况下电压信号同步相位的检测精度,提出了一种基于增强型滑动平均滤波(EMAF)算法的快速锁相算法。首先使用dq旋转坐标变换获得直流电压信号;然后利用EMAF算法滤除谐波、负序分量及噪声;最后,通过数学推导公式获得并网同步信息,实现并网逆变器的高性能控制。该算法无需复杂的锁相闭环回路,即可实现同步相位和电压幅值的快速检测,消除电网电压幅值、相位和频率跳变对正序分量提取的影响,具有较强的适应新型电力系统畸变环境的能力。仿真结果验证了所提算法的正确性和有效性。
In order to improve the detection accuracy of voltage phase synchronization under distorted voltage in new power system,the paper proposes a fast phase locking algorithm based on enhanced moving average filter(EMAF)algorithm.Firstly,this algorithm uses the dq frame transformation to obtain the DC voltage signal,and then uses the EMAF algorithm to filter out harmonics,negative sequence component and noise.Finally,the grid-connected synchronization information is obtained by mathematical formulas to realize the high-performance control of grid-connected inverters.The algorithm can realize the rapid detection of the synchronization phase and voltage amplitude without the phase-locked closed-loop.Simultaneously,the algorithm can eliminate the influence of the voltage amplitude,phase and frequency jumping on the extraction of positive sequence component,and has a strong adaptation to the new power system environment distortion.The simulation results verify the correctness and effectiveness of the algorithm.
作者
修连成
甘艳
何靖萱
李明贤
李尚轩
XIU Liancheng;GAN Yan;HE Jingxuan;LI Mingxian;LI Shangxuan(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Central China Branch of State Grid Corporation of China,Wuhan 430077,China;State Grid Jiaxing Power Supply Company,Jiaxing 314033,China)
出处
《智慧电力》
北大核心
2022年第1期88-93,共6页
Smart Power
基金
国家自然科学基金资助项目(51977152)。
关键词
快速锁相
增强型滑动平均滤波法
新型电力系统电压畸变
谐波滤除
fast phase locking
enhanced moving average filter
new power system voltage distortion
harmonics elimination
