Device and method of mega-kilowatt class nuclear power plant delay relay fault diagnosis

A technology of fault diagnosis device and time delay relay, which is applied in measuring devices, circuit breaker testing, instruments, etc., can solve the problems of equipment site safety and stability risks, delay relay failures, equipment shutdown actions, etc. operating environment, improved reliability, and improved cognitive effects

Inactive Publication Date: 2017-03-08
GUANGDONG NUCLEAR POWER JOINT VENTURE +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, just like other equipment, time-delay relays may also fail, resulting in equipment shutdown or wrong action, which poses risks to equipment and site safety and stability
In the prior art, there is just a lack of devices and solutions for fault diagnosis of this type of time-delay relay

Method used

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  • Device and method of mega-kilowatt class nuclear power plant delay relay fault diagnosis
  • Device and method of mega-kilowatt class nuclear power plant delay relay fault diagnosis
  • Device and method of mega-kilowatt class nuclear power plant delay relay fault diagnosis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] See figure 1 The delay relay fault diagnosis device for a mega-kilowatt nuclear power plant proposed in the first embodiment has a relay board 100, a PLC rack 200, and a DC power supply 300. The DC power supply 300 uses a 48V DC power supply as an example.

[0034] The relay board 100 has an auxiliary relay assembly base and a delay relay assembly base, the auxiliary relay assembly base is equipped with an auxiliary relay 110, and the delay relay assembly base is equipped with a delay relay 120 that requires fault diagnosis.

[0035] The PLC rack 200 has a CPU module 210, a switch output board 220, and a switch input board 230. The DC power supply 300 and the CPU module 210 are respectively connected to the switch output board 220 with electrical signals to control the switch output board 220 to use the DC power supply 300 to generate a driving signal, which is generally a square wave signal. The switch output board 220 is also connected to the electrical signal of the delay...

Embodiment 2

[0039] please at figure 1 On the basis of figure 2 , The method for diagnosing the delay relay fault of a million-kilowatt nuclear power plant in the second embodiment adopts the fault diagnosis device for the delay relay of a million-kilowatt nuclear power plant in the first embodiment, and includes the following steps S100 to S500:

[0040] S100. The CPU module controls the switch output board to generate a driving signal and output to the delay relay.

[0041] S200. The delay relay is started after receiving the drive signal, and at the same time the timing unit of the CPU module is started, and the switch input board collects the contact action signal of the auxiliary relay in real time.

[0042] S300. The switch input board collects the contact action signal of the auxiliary relay and transmits it to the CPU module, and at the same time the timing unit of the CPU module stops.

[0043] S400, the CPU module compares the preset nominal value of the delay relay action with the timin...

Embodiment 3

[0047] please at figure 2 On the basis of image 3 The method for diagnosing the delay relay fault of a million-kilowatt nuclear power plant proposed in the third embodiment is further refined and optimized on the basis of the second embodiment. Specifically, step S300 also includes: the first counting unit of the CPU module automatically adds 1 After step S300, it also includes: S310, when the first counting unit of the CPU module has not reached the preset number of times, repeat steps S100 to S300.

[0048] In this embodiment, the setting of the first counting unit facilitates the recurrence of the diagnosis process and reduces misdiagnosis. In step S500, the fault condition of the delay relay can be diagnosed based on the comparison results corresponding to the preset times of the first counting unit. If the digital input board can collect the preset number of action signals from the contacts of the auxiliary relay, it means that the delay relay can operate (but the delay m...

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Abstract

The invention relates to a device and a method of mega-kilowatt class nuclear power plant delay relay fault diagnosis. The device part comprises a relay board, a PLC rack and a DC power supply, wherein the relay board is equipped with an auxiliary relay and is provided with a delay relay equipping seat; the PLC rack is provided with a CPU module, a switch signal output board and a switch signal input board; the DC power supply and the CPU module are respectively in electric signal connection with the switch signal output board; the switch signal output board is also in electric signal connection with the delay relay equipped on the delay relay equipping seat; the delay relay is also in electric signal connection with the auxiliary relay equipped on an auxiliary relay equipping seat; and the switch signal input board is connected with the contact of the auxiliary relay and is in electric signal connection with the CPU module. Through fault diagnosis on the delay relay, a field fault condition can be reproduced, the usability of the delay relay is ensured, equipment and field safety risks are reduced, and safety and stability of the nuclear power plant are promoted.

Description

Technical field [0001] The invention relates to the field of time delay relay equipment for nuclear power plants, in particular to a fault diagnosis device and method for a time delay relay of a million kilowatt nuclear power station. Background technique [0002] The Daya Bay Nuclear Power Plant is the first large-scale commercial nuclear power plant with a million-kilowatt level in mainland China. It has a million-kilowatt-level pressurized water reactor nuclear power plant. It has not only accumulated experience for the autonomy and localization of my country’s million-kilowatt-level commercial nuclear power plants, but also for my country’s nuclear power plants. The business has achieved leapfrog development and latecomers have laid the foundation for catching up with the international advanced level. [0003] At present, many devices in the Daya Bay Nuclear Power Station need to use delay relays. Delay relay is mainly used in various protection and automatic control circuits o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 刘海琪刘洋何银江王正斌王宝刚
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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