| 摘要 |
<p>PURPOSE:To improve AVR control accuracy by detecting a physical quantity of a field exciting system fluctuating according to exciting power supply voltage and feeding back the detected physical quantity negatively in order to correct an AVR control signal. CONSTITUTION:Output voltage from the armature 1 of a generator is detected via a voltage transformer 6 and the difference between the output voltage and a reference voltage VREF is operated by an AVR operating part 11. An exciting equipment main body 4 is driven by the output of the AVR operating part via a gate pulse generating part 12 to control the field current to be fed to a field winding 2. The field current is detected by a current transformer 7a, rectified and inputted into a field current feedback control part 13 where it is operated. The output thereof is subtracted from the output of the AVR operating part 11 and inputted to the gate pulse generating part 12. In other words, the stability of AVR control is improved by adding the field current control as a minor loop.</p> |
