摘要
针对传统的基于低通滤波器的单相锁相环带来的网侧电压幅值衰减和相位滞后问题,提出了一种带通滤波器锁相环控制策略,基于带通滤波器对输入信号幅值无衰减和相位保持的特性,在所设定条件下该方法能够无延迟地提取出网侧电压的基波,并保持基波电压的幅值不变。针对电流环比例谐振控制器因带宽小,在电网频率偏移时带来功率因数下降的问题,采用了一种改进的比例谐振控制器。该控制器增加了带宽,具备零稳态误差和消除电网电压扰动影响的能力,能够减小电网频率偏移对系统的影响。最后,仿真和实验验证了所提出的基于带通滤波器锁相环控制策略和经过改进的比例谐振控制器方法的有效性和正确性。
The problems of traditional singlePLL are that the voltage amplitude decline and phase lag from the line side.To solve the problem,a control strategy of band pass filter PLL based on the characteristics of amplitude noattenuation and phase nolag for input signal was proposed.The fundamental voltage was extracted without delay and the voltage amplitude kept constant with the given method.The problem of proportionalresonant controller of current loop is power factor decline with the grid frequency deviation due to the narrow bandwidth.An improved control strategy which realizes zero steadystate error and eliminates the influence of grid voltage disturbance was proposed to expand the bandwidth and reduce the impact on the system due to the grid frequency deviation.The validity and feasibility of proposed control scheme were verified through simulation and experiment results.
作者
武琳
杨林
姜远
赵守忠
赵泓博
WU Lin;YANG Lin;JIANG Yuan;ZHAO Shou-zhong;ZHAO Hong-bo(State Grid Electric Power Research Institute Beijing Kedong Electric Power Control System Co.,Ltd.,Beijing 100092,China;State Grid Liaoning Electric Power Supply Skills Training Center,Jinzhou 121000,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2017年第11期101-106,共6页
Electric Machines and Control
基金
国家电网公司总部科技项目(JS71-16-006):全球能源互联网实验研究平台
关键词
单相整流器
锁相环
比例谐振控制器
带通滤波器
传递函数
single phase rectifier
phase locked loop
proportionalresonant controller
bandpass filter
transfer function
