摘要
准确的相位信息对大部分现代电能变换装置的稳定运行至关重要,比如高频PWM整流。软件锁相环(SPLL)具有设计自由、适应性强等优点可快速准确获得电网电压的相位和频率信息。本文针对电网电压不对称的情形,分析SPLL原理,获得SPLL线性化模型,设计SPLL控制器,讨论实际情况对控制器参数的要求,并用DSP实现所设计SPLL。仿真表明所设计SPLL良好运行于高频PWM整流,并对其他电能变换装置中的SPLL设计具有指导意义。
Accurate phase information is cmcial for most of the modem power- electronics apparatus such as the PWM rectifier, PWM converter and so on. A software phase - lock loop （SPLL） has so many advantages, such as freedom of design. Then it is usually proposed to obtain phase and frequency information of the grid voltage. In this paper, considering of the condition of grid voltage dissymmetry, the operational principle of SPLL is analyzed. The linearized model of SPLL is obtained, and also the SPLL controller is designed. The relations between controller parameters and operation conditions are discussed and the conceived SPLL is achieved by DSP. Simulation results indicate the designed SPIL can work well in a PWM rectifier.
出处
《内燃机与动力装置》
2009年第B06期53-57,共5页
Internal Combustion Engine & Powerplant
