采用CPLD器件的ASVG脉冲触发控制

Pulse-trigger control of ASVG with CPLD

介绍了基于多重化变压器连接逆变器的新型静止无功发生器ASVG(AdvancedStaticVarGenerator)试验装置的结构,四重化逆变器是该装置的核心部件。用复杂可编程逻辑器件CPLD(ComplexProgramLogicDevice)实现的脉冲发生器对多重化逆变桥进行脉冲触发控制是一种先进的控制手段,这是一种全数字的控制方式,脉冲发生环节为全硬件实现,精度高、响应速度快,给逆变器设计中的桥臂直通、变压器偏磁等典型问题的解决提供了有效的途径,可以灵活地调整触发角度、改善输出波形及抑制指定次数谐波。

A proto-type of ASVG(Advanced Static Var Generator)based on multi-inverter is in-troduced.The multi-inverter is the critical part of the model.A pulse generator constructed of CPLD(Complex Program Logic Device)is employed to control its pulse-trigger.This is an advanced and digital control method.The pulse is generated by hardware,which has high accuracy and rapid res-ponse.This method is effective in resolving the problems of converter design,such as bridge arm short circuit and transformer magnetization.The trigger angle can be flexibly adjusted to improve the output waveform and eliminate specified harmonic.