To maintain both the voltage and the frequency within limits requires fine power control and loadregulation.
既要保持电压而在限制范围内的频率，需要良好的功率控制和负载调节。
2
Voltageregulation includes two fields: one is voltage rise near the end of the feeder: another is the tap hunting phenomenon of tap change under load (TCUL) transformers.
Test results show that the designed power supply has good voltageregulation performance, with small ripple and high regulation rate of voltage and load.