基于TMS320F28335的三相并网型光伏逆变器设计

Design of the three-phase grid-connected inverters based on TMS320F28335

为便于分布式光伏发电以微网形式接入到本地配电网中,根据空间矢量脉宽调制(SVPWM)和PQ控制算法的基本原理,设计了一套基于DSP处理器的并网型光伏逆变器,通过软硬件的结合,在DSP平台上进行调试和试验验证。利用TMS320F28335实现SVPWM波形具有控制算法简单、实现方便、速度快、控制准确等优点,光伏逆变器能稳定输出相电压有效值为(220±6.6)V、电压频率为(50±0.5)Hz的交流电,输出电压谐波含量较小,在光伏并网发电领域具有较好的应用前景。

In order to facilitate distributed photovohaic connected to the local distribution network in the form of micro-grid, a grid-connected PV inverter was designed based on DSP processor according to space vector pulse width modulation （SVPWM） and PQ control algorithm, and debug and verification through a combination of software and hardware on the DSP platform. Using TMS320F28335 to achieve SVPWM waveform has a characterization of control algorithm simply, achieve easily, control fast and accurate, etc on. Inverter could stabilize the output phase voltage effective value on （220 ± 6.6） V, voltage frequency was （50 ± 0.5 ） Hz, the output voltage harmonic content was small. In the field of grid-conncected photovohatic power generation, the inverter has good application prospects.