Circuit breaker dynamic contact resistance prediction method and system based on partial least square estimation

The invention provides a circuit breaker dynamic contact resistance prediction method and system based on partial least square estimation, and the method comprises the following steps: obtaining a stroke signal when a circuit breaker acts, and the test voltage and test current of a contact, and obtaining an actual dynamic contact resistance curve of the circuit breaker; constructing a partial least square estimation contact resistance prediction model based on a radial basis kernel function by taking the test current and the action speed as independent variables and the contact resistance as a dependent variable based on the test current and the action speed of the contact; and adjusting the test current and the action speed of the contact to obtain a predicted value of the contact resistance. The method is suitable for field measurement of the dynamic contact resistance of the high-voltage circuit breaker, under the condition that the test current and the action speed change, the predicted value of the dynam