摘要
设计了一种特定消谐式变频器,其每周期的开关角个数随输出频率而改变。根据变压变频的要求确定存储器中开关角的存储方式,通过锁存电路使变压与变频同步,以避免输出波形中电压尖峰的产生。在发电厂中的运行结果表明,该变频器节能效果明显、变频工作稳定、消除谐波次数多、残余的谐波分量幅值小、使电动机发热损耗小。
A kind of selective harmonic elimination inverter is designed and the number of its switching angles in every period is varied with output frequency. The memory mode of switching angles in the memorize is determined according to the request of VVVF(variable voltage variable frequency) and the variable voltage is made synchronous with the variable frequency by lock-on circuit for avoiding the appearance of voltage pinnacle in output waveform. The experimental results in power plant show that the designed inverter has obvious energy-saving effect, steady frequency transformation, the ability to eliminate various orders harmonic, the small amplitude of remnant harmonic and the small heat loss from electromotor.
出处
《电力系统自动化》
EI
CSCD
北大核心
2004年第6期65-67,93,共4页
Automation of Electric Power Systems
基金
黑龙江省科技攻关项目(G99A11-3)
关键词
特定消谐
变频器
开关角
火电厂
节能
selective harmonic elimination
inverter
switching angle
power plant
energy-saving
