Network voltage interruption detection and control method for multi-unit train network side converter
A grid-side converter and control method technology, which is applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of power supply interruption, intensified pantograph vibration, overcurrent on the AC side of grid-side converters, etc. Normal and safe operation and the effect of reducing potential safety hazards
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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] figure 1 It is a schematic diagram of the main circuit of an EMU network side converter provided by the present invention. The grid-side converter includes two parallel single-phase PWM rectifiers, the AC side of the PWM rectifier is directly connected to the two secondary windings of the traction transformer, and the DC side is connected in parallel. The main circuit of the PWM rectifier includes AC filter inductor L, power devices B1~B4, DC support capacitor C, and second harmonic filter inductor L r and the filter capacitor C r . Among them, the AC filter inductor L can greatly reduce the harmonic current injected into the AC grid by the PWM rectifier; the power devices B1~B4 use half-bridge IGBT intelligent power modules, which integrate the functions of driving, protection and current measurement, and can simplify the system. structure t...
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