基于DSP三相电压源变换器SPLL设计与应用

Design and Applications of Three Phase Voltage Converter Software Phase-locked Loop Based on DSP

准确的相位信息是三相电压源变换器稳定运行的重要条件。软件锁相环(SPLL)具有设计多样性、高抗干扰性等优点可快速得到电网电压的相位信息。本文以三相电压源型PWM变换器为对象,分析了SPLL工作原理,推导出SPLL线性化模型,分析设计SPLL控制器参数,并用DSP实现所设计SPLL。仿真及试验表明所设计SPLL良好应用于三相电压源型PWM整流装置。

Accurate phase information is crucial for stable operation of three-phase voltage source converter.The software phase-locked loop（SPLL） has the design diversity,high anti-jamming,etc,and can quickly get the phase information of the grid voltage.In this paper,based on the three-phase voltage source PWM converter,the operational principle of SPLL is analyzed,the linearization model of SPLL is obtained,the SPLL controller parameters is designed,and the design of SPLL is realized by DSP.Simulation and tests show that the design of SPLL can work well in three-phase voltage source PWM rectifier.