HUANG Xinbo, WANG Haidong, HU Haiyan, et al. Technology and Application of Avoiding Locked Rotor Fault of HV Switchgear Electric Chassis[J]. High voltageapparatus, 2018, 54(3): 205-211+218.
HUANG Xinbo, WANG Haidong, HU Haiyan, et al. Technology and Application of Avoiding Locked Rotor Fault of HV Switchgear Electric Chassis[J]. High voltageapparatus, 2018, 54(3): 205-211+218. DOI: 10.13296/j.1001-1609.hva.2018.03.030.
Technology and Application of Avoiding Locked Rotor Fault of HV Switchgear Electric Chassis
According to the problems such as the long time of locking rotor protection and the unreasonable of the protective threshold of the DC motor in the HV switchgear electric chassis
a locking rotor protection system is presented based on the Daubechies6 wavelet de-noising algorithm. This protection system is taking the locking rotor current as the eigenvalue
determine the range of the protective threshold of the mathematical model that established by the relationship between the temperature rise of the DC motor under the condition of overload and locking rotor fault. At the same time
the Daubechies6 wavelet algorithm is used to de-noise the current signal. The interference factors are eliminated effectively
so that the current data are much closer to the actual value
and the maximum value of the current can be quickly detected. The testing platform for 10 kV HV switchgear electric chassis shows that the protection systemcan meet the requirements of the locking rotor protection
and have advantages in fast response speed
high reliability and distinguish the fault at startup time.