摘要
在一些与电网三相电压相关联的电力电子设备中,获得电网电压实时基波相位是非常重要的。针对电网出现三相电压不平衡的情况,提出了一种基于单二阶广义积分器的三相数字锁相环的设计方案,并通过Matlab/Simulink进行仿真,仿真结果验证了锁相环在电网三相跌落而出现三相电压不平衡时,仍可以准确跟踪三相电网相位。设计方案原理清晰,结构简单,易于实现。可以很方便的移植到FPGA中,构成全硬件集成锁相环;也可以移植到DSP中,构成全软件锁相环。
In some electronic devices associated with power grid three-phase voltage,it is very important to obtain the real-time fundamental wave phase of the power grid voltage accurately.Aiming at the condition of the power grid appearing unbalanced three-phase voltage,this paper puts forward a design scheme of three-phase digital phase-locked loop based on single second-order generalized integrator and makes the simulation by Matlab/Simulink.The simulation results show that the phase-locked loop can track the phase of three-phase power grid accurately when there is three-phase drop and unbalanced three-phase voltage in the power grid.The design principle is clear,simple and easy to implement.It is easy to be transplanted in FPGA and constitute the entire hardware integrated PLL;it also can be transferred in DSP and constitute a software phase-locked loop.
出处
《电测与仪表》
北大核心
2015年第6期96-101,共6页
Electrical Measurement & Instrumentation
关键词
二阶广义积分器
三相鉴相器
数字锁相环
仿真
设计
second-order generalized integrator
three-phase phase discriminator
digital phase-locked loop
simulation
design
