Abstract

The operation of a synchronization unit based on the principle of phase-locked frequency tuning has been considered. The classical method to measure the supply voltage implemented on the basis of phase-locked frequency tuning is more appropriate than the method of symmetric components, which is more complicated in design, operation, and commissioning. The phase-locked loop frequency method is successfully used in synchronization units for valve frequency converters if the amplitude of a reverse phase sequence is more than 20%. The dependence of the transient process time of a measured voltage variable in the synchronization device on the level of supply voltage asymmetry determined by the voltage component amplitude of a reverse phase sequence has been obtained. The area of application of a phase-locked frequency system can be enlarged due to the use of a selective Butterworth filter and a correct choice of its Q-factor.

中文翻译：

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提高有源整流器与市电同步的可靠性

摘要

已经考虑了基于锁相频率调谐原理的同步单元的操作。基于锁相频率调谐实现的测量电源电压的经典方法比对称元件的方法更合适，后者在设计、操作和调试方面更为复杂。如果逆相序幅值大于20%，锁相环频率法成功地用于阀变频器的同步单元。已获得同步装置中测量电压变量的瞬态过程时间与由反相序的电压分量幅度确定的电源电压不对称水平的相关性。Q因子。