Measuring method of reset time of damping closing resistance of high voltage circuit breaker

Abstract

The invention relates to a method for measuring the reset time of the damping closing resistance of a high-voltage circuit breaker. The method is as follows: on the side of the moving contact of the damping closing resistor, a conductive piece electrically connected to the moving contact of the resistance is provided. When the static contact starts to close, it will be separated from the resistance static contact, so that the resistance contact of the circuit breaker completes a closing and opening operation, and the conduction between the resistance moving and static contacts during the closing and opening process is recorded The relationship between the situation and time; the time point when the resistance moving and static contacts are disconnected during the closing and opening operation is taken as the starting point, and the time point when the resistance moving and static contacts are connected again is taken as the end point , the time difference between the start point and the end point is the reset time of the resistance static contact. This measurement method can easily and accurately obtain the time point when the resistance circuit is disconnected and connected, and then obtain the reset time of the static contact of the resistance.

Description

technical field [0001] The invention relates to a method for measuring the reset time of the damping closing resistance of a high-voltage circuit breaker. Background technique [0002] A high-voltage circuit breaker is a switchgear that can carry, close and break the normal current of the operating line, and can also carry the abnormal current of closing and breaking within the specified time. It is an important electrical device for protecting and operating the power system. . In the high-voltage power grid system, the overvoltage will be generated when the circuit breaker is closed, which is harmful to the power grid system. Therefore, in the system above 330KV, the circuit breaker is generally required to be combined with the gate resistor to reduce the overvoltage of the gate. Interconnection of interrupter interrupters, high voltage circuit breaker closing resistors are often used as damping resistors. [0003] The authorized announcement number is CN203966946U, and t...

AI Technical Summary

Problems solved by technology

[0004] However, the reset time of the damping closing resistor is not easy to measure. Although the starting point of the opening time is relatively easy to obtain, it is not easy to measure the end time point when the static contact resets at low speed. It is necessary to set up another measurement system or rely on the naked eye to distinguish In addition, when the measurement system is set up, the measurement device is relatively complicated and the cost is high. The naked eye identification will cause the judgment of the reset end state to be inaccurate, and the error is large, so that the measurement of the reset time is not accurate enough, which will affect the experimental results.

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