FORECASTING METHOD OF EMERGENCY MODE OF FUNCTIONING OF PULSE-WIDTH CONVERTERS IN REAL TIME Russian patent published in 2014 - IPC H02H7/10 

FIELD: electricity.

SUBSTANCE: preliminary studies by using a nonlinear model of the PWM power converter the following are determined: emergency amplitude ripple voltage at the inverter output, time periods in the pulse-width modulation amplitude between successive measurements of the voltage ripple on the output of the converter, which is minimally required for recognition of these changes of these measurement results, the factor considering the worst possible joint effect of inductance in the power converter circuit and power capacitors at the amplitude of the pulsations of the inverter output. In operation, the transducer measures the current ripple amplitude at the output, the result is stored. After each successive measurement of the amplitude of the output voltage ripple, the change of the amplitude is determined with respect to the value in memory. The result is corrected using the previously mentioned ratio. The change is compared with the adjusted alarm value, based on this comparison, is projected upon reaching emergency pulsation amplitude values, leading to an emergency mode. Forecasting is repeated after each new measurement of the amplitude of the output voltage ripple of the converter.

EFFECT: increased extent of algorithmisation of forecasting process for emergency modes of pulse width power converters.

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