侯立健,朱长青,陈雅,严雪飞.基于二阶广义积分器的单相并网系统锁相技术的研究[J].电测与仪表,2016,53(13):. (HOU Li-jian,ZHU Chang-qing,CHEN Ya,YAN Xue-fei).Research on SOGI for Phase Lock Technique of the Single-phase Grid-connected System[J].Electrical Measurement & Instrumentation,2016,53(13):.
基于二阶广义积分器的单相并网系统锁相技术的研究
Research on SOGI for Phase Lock Technique of the Single-phase Grid-connected System
Because the grid voltage is usually affected by disturbance and harmonic, so in the synchronous application of grid-connected converter, there is a phase difference between grid-conneccted current and grid voltage, which will have impact and pollution to the power grid. According to the practice, some phase locked loop(PLL) based quadrature signal generator(QSG) have better performance. This paper uses the second-order general integrator(SOGI) that is improved, and frequency of SOGI automatically tracks the input frequency through a simple control loop instead of trigonometric function, finally this scheme construct new-style structure of the frequency locked loop with PLL module.This scheme is easy to design and implement, simulation results show its excellent performance, frequency and angle can be detected rapidly and do not contain a steady oscillation, the feasibility and the superiority of the scheme are verified.
