Device and method for preventing 220kV main transformer gap protection malfunction
A protection device and variable gap technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as outage of main transformer sub-devices, and achieve the effect of ensuring safe and stable operation and improving power supply reliability.
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[0016] The present invention will be described in detail below with reference to the accompanying drawings: the present invention aims to solve the problem of misoperation of the main transformer gap protection due to the mismatch between the main transformer gap protection and the line automatic reclosing. On the basis of the original gap protection configuration, the gap overvoltage protection and gap overcurrent protection are classified and considered. For those that meet the clearance overvoltage operating conditions, the outlet will be directly protected after a delay. For those that meet the gap overcurrent action conditions, the automatic reclosing signal is introduced to determine the matching of the relationship between the two; the present invention uses the gap protection device 5 to achieve the matching of gap protection and automatic reclosing, and different action logics are designed respectively.
[0017] A method for preventing 220kV main transformer gap protecti...
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