Rapid switching mode variable impedance transformer adaptive current protection method
A fast switching and current protection technology, which is applied in the direction of automatic disconnection emergency protection devices, emergency protection circuit devices, electrical components, etc.
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[0022] The invention proposes the concept of a novel variable impedance transformer. The new transformer can limit the short-circuit current without causing problems such as large energy loss, large occupied area, and huge transformation workload. The invention analyzes in detail the sensitivity of the overcurrent protection of the novel variable impedance transformer, and uses PSCAD software for simulation verification. The invention proposes a new method capable of solving the insufficient sensitivity of traditional protection: self-adaptive current protection. By monitoring the operation mode of the system online and checking the type of fault, adjust the setting value of the protection setting current to meet the requirements of protection sensitivity.
[0023] One of the purposes of the present invention is to judge and analyze the current transient process of the variable impedance transformer when a fault occurs, and analyze the sensitivity of the overcurrent backup pr...
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