Resistance-capacitance matching method and device for overvoltage absorption system of auxiliary winding of transformer

• Main Authors: LI CHUNBO, CHEN SANMENG, FAN LIBING, REN ZEWEN, ZHOU ANDE, XIE HONGBING
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2022
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; PERFORMING OPERATIONS; POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES; TRANSPORTING; VEHICLES IN GENERAL

The invention discloses a resistance-capacitance matching method and device for an overvoltage absorption system of an auxiliary winding of a transformer. Model building is carried out in matlab/Simulink software, an auxiliary loop is simulated, and the overvoltage absorption system is matched. Through a program, several groups of'mother combinations' of parameters of the resistance-capacitance absorption device are given in advance, and after a model is imported, auxiliary winding overvoltage simulation is carried out. And after an obtained overvoltage waveform is obtained, generating a sub-combination with a relatively low overvoltage level, and importing the sub-combination into the model again to carry out auxiliary winding overvoltage simulation. And continuously circulating until the optimal parameters of the overvoltage resistance-capacitance absorption device are found. On the premise that a mathematical model of an overvoltage source of a traction transformer is not needed, resistance-capacitance mat