ripple effect
3.The field operation of system indicates that the strategy based on fuzzy boundary criterion is able to reduce the time of tap-cha nge control and voltage ripple. Comparing with the result of general nine-subdiv ision control,the strategy based on fuzzy boundary criterion of reactive power can increase the service life of tap changer while does not reduce the effect of voltage and reactive power control.
4.The functions and effect of inductance and capacitance in the circuit of single and double transformer on the current wavcform and ripple factor have been studicd and tested systematically in this paper and it is proved that this power supply without any forms of filter circuit in the sccondary eide of transformer can obtain direct currcnt with stability, no currcnt zero and low ripple factor to satisfy complctely the rcquircmcnt of CO2 lascr when it is conncctcd a single-phase nctwork service.
