组合型光伏并网发电系统

Combined Photovoitaic Grid-Connected Power System

采用功率组合技术,通过功率主电路单元并联,运用移相PWM并联组合技术,实现系统结构模块化,可组成大功率光伏并网发电装置,提高系统故障冗余能力,保证系统安全可靠运行。系统采用非线性解耦控制策略及最大功率寻优、空间矢量PWM控制,进行电流跟踪,可调节电网功率因数,且电压适应范围宽。以移相PWM并联组合技术为基础,采用3个单相20kVA的光伏并网发电装置组成60kVA三相光伏并网发电装置,已投入运行。

The technology of combine power is adopted, it can realize structure-modularization in system through paralleling power main circuit and exerting technology of parallel combined shift phase PWM, combine great power photovoltaic grid-connected power equipment, improve fault redundancy capability of system, ensure system to work in safety. The nonlinear decoupled control.MPPT technology,space vector PWM control,current tracking method are adopted in system, it can adjust power factor on grid, and have wide voltage range in this system. The 60kVA three phase photovohaic grid-connected power system made of three single phase 20kVA photovohaic grid-connected power equipment based on technology of parallel combined shift phase PWM have been operated.