Brake resistor over-temperature detection method and device and storage medium

• Main Authors: WANG YUNGUANG, YANG ZHIQIAN, ZHOU JIANHU
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2020
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

The invention discloses a brake resistor over-temperature detection method and device and a storage medium. The method comprises the steps of obtaining a real-time resistance value of a brake resistorin a direct-current bus loop of awind generating set,and if the real-time resistance value is greater than the first resistance protection threshold value, determining that the brake resistor has anover-temperature fault,wherein the first resistance protection threshold value is determined by the limit temperature rise which can be reached by the brake resistor after the instantaneous impact ofthe power grid and the corresponding relation between the preset resistance value of the brake resistor and the temperature rise. By adopting the technical scheme in the embodiment of the invention, real-time over-temperature protection can be carried out on the brake resistor on the premise of not using a temperature sensor and a cable. 本发明公开一种制动电阻过温检测方法、装置、存储介质。该方法包括：获得风力发电机组直流母线回路中制动电阻的实时阻值；若实时阻值大于第一电阻保护阈值，则确定制动电阻发生过温故障；