智能微网逆变器系统设计

Design of the Inverter of the Combined System

该文设计了一种智能微网逆变器装置,可有效滤除电网中存在的各种谐波。逆变器主要由DSP控制电路、同步信号及锁相环电路以及功率驱动电路等组成,利用倍频锁相环技术对电网电流进行采样,并将采样信号输入DSP控制系统,再按一定的算法输出PWM补偿信号,并经过功率驱动电路反馈到电网中,可有效滤除电网中存在的各种谐波,解决了微网污染越来越严重的问题。此外,系统设计的保护电路,以确保系统电路安全可靠地运行。

This paper presents a active filter which can compensate harmonic to macro grid systemThis in- verter includes DSP control system,the synchronous signal and phase locked loop and power drive system. The inverter takes sample to grid current using frequency doubling PLL technology,feeding sampling signal to the DSP control system.In accordance with certain algorithm the control system outputs PWM compen- sating signal fed back to the power grid in power drive current,which eliminates harmonic wave in power grid.Besides the perfect protection circuit in inverter guarantees the inverter to run safety and credibility.