Primary through-flow system and method for nuclear reactor coolant pump motor

Abstract

The invention belongs to the technical field of electric power debugging and electric power testing, and particularly relates to a primary through-flow system and method for a nuclear reactor coolant pump motor. The system comprises a rotating speed medium-voltage switch cabinet I, a rotating speed cable I, an electrical penetration assembly, a rotating speed medium-voltage switch cabinet II, a rotating speed cable II, an electrical penetration assembly and the nuclear reactor coolant pump motor, wherein the rotating speed medium-voltage switch cabinet I is connected with the nuclear reactor coolant pump motor through the rotating speed cable I and the electrical penetration assembly; and the rotating speed medium-voltage switch cabinet II is connected with the nuclear reactor coolant pump motor through the rotating speed cable II and the electrical penetration assembly. According to the primary through-flow system, the problem of disconnection of windings of the nuclear reactor coolant pump motor, the electrical penetration assembly and cable wirings can be checked and found, the correctness of the motor differential protection CT secondary circuit wiring is checked, the accuracy and credibility of the primary through-flow test result are ensured, and reliable guarantee is provided for the safe operation of the nuclear reactor coolant pump motor.

Description

technical field [0001] The invention belongs to the technical field of power debugging and power testing, and in particular relates to a nuclear reactor coolant pump motor primary flow system and method. Background technique [0002] The reactor coolant pump motor of the pressurized water reactor nuclear power plant is used to drive the reactor coolant pump installed in the primary circuit of the reactor. Nuclear reactor coolant pump motors generally adopt asynchronous motors, and their power is generally above 2000kW, and differential protection is configured according to regulations. The nuclear reactor coolant pump motor is arranged in the containment building of the nuclear island, and its electrical wiring is led out to the power switch and protection equipment of the conventional island building through the electrical penetration of the containment building. There are many intermediate transfer ports for the electrical wiring of nuclear reactor coolant pump motors, an...

AI Technical Summary

Problems solved by technology

In the existing nuclear reactor coolant pump motor using a double-speed asynchronous motor, an AC current is usually passed between the two phases on the feeder cable side of the main power switch feeder cable of the I speed for primary flow through the I speed differential protection during the first flow test, and the second flow is performed at the second speed differential protection. The AC current is passed between the two phases of the main power switch feeder cable side of the speed main power switch to carry out the primary flow of the second speed differential protection, and the CT forming the first speed differential protection in the motor body and the other CT forming the second speed differential protection will flow the same Amplitude and phase currents are not easy to distinguish and judge, resulting in inaccurate test results

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