Self-checking method of converter, converter and equipment
The invention discloses a self-checking method for a converter, the converter and equipment, and the method comprises the steps: controlling a test loop to transmit a preset electric signal to a current transformer before a unit is started; and acquiring an analog signal output by the current transf...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a self-checking method for a converter, the converter and equipment, and the method comprises the steps: controlling a test loop to transmit a preset electric signal to a current transformer before a unit is started; and acquiring an analog signal output by the current transformer, and judging whether the current transformer fails or not according to the analog signal and a preset signal. According to the characteristic that the current output by the current transformer is only influenced by the resistance value of the winding, reference judgment is carried out according to the correlation of the analog quantity signal output by the current transformer and the resistance value. Therefore, whether the current transformer fails or not can be judged by judging the deviation value of the analog quantity and the preset signal in the normal state, such as wiring failure or wrong selection proportion, and greater loss of equipment is avoided.
本发明公开了一种变流器的自检方法、变流器及设备,包括:机组开机前,控制测试回路发出预设电信号至电流互 |
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