具有自起励功能的小型同步发电机可控硅励磁装置的研究

The Research of the SCR Excitation Device of a Small Synchronous Generator with Self-excitation Function

电网电压是否稳定是衡量供电质量的重要指标之一，它主要取决于发电机的励磁电流是否能随电网电压的变化而自动调节。SCR两磁装置，应用了可控硅变流技术，并采用了与起励可控硅串联电阻的方法来限制起励电流，从而使起励单元简化，可用残压可控半波整流电路起励，使整机造价下降。试运行证明性能安全可靠。

The voltage stability in the network is one of the important indexes in the measure of power-supply quality,it is mainly based on the automatic regula-tlon of the generator's excitation current with the voltage change in the network.The SCR exciting device with the SCR converting technique improves the auto-regulating accuracy of the voltage in the generator and the operating stability,regu-lates the exciting current by means of the series resistance with the SCR device ,sothat the excitation unit excited with the residual voltage in the half-wave rectifica-tion controlled circuit is simplified,the overall price is reduced. After testing opera-tion for half a year,the SCR devlce is proved to be safe and reliable.