MULTI-CHANNEL DEVICE FOR OPTICAL CONTROL OF CONVERTER BRIDGE RECTIFIERS IN D.C. TRANSMISSION LINES

摘要

A multi-channel device is proposed for optical control of converter rectifiers in D.C. transmission lines comprising n identical channels, n being equal to the number of arms in a converter bridge, each channel including a shaper of wide square pulses connected in series with a pulse-width modulation converter of the light flux, all these elements being at the earth potential; as well as a photoreceptor and a control pulse amplifier which are connected in series at the rectifier potential, while the shaper of wide square pulses is provided with a master pulse trigger which has its input connected to a primary pulse transmitter, and the pulse-width modulation converter of the light flux includes a single stage transistor amplifier whose input is coupled to said master pulse trigger and whose output is coupled to a semiconductor optical modulator serving to receive optical signals from a light flux emission source and to transmit modulated signals to an optical splitter which, in turn, feeds split signals to said photoreceptor at the potential of the gate.