CN117387770A - Temperature monitoring device for electric penetration piece of nuclear power plant - Google Patents

Temperature monitoring device for electric penetration piece of nuclear power plant Download PDF

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Publication number
CN117387770A
CN117387770A CN202311230265.6A CN202311230265A CN117387770A CN 117387770 A CN117387770 A CN 117387770A CN 202311230265 A CN202311230265 A CN 202311230265A CN 117387770 A CN117387770 A CN 117387770A
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CN
China
Prior art keywords
temperature monitoring
temperature
module
electromagnetic induction
monitoring probe
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Pending
Application number
CN202311230265.6A
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Chinese (zh)
Inventor
刘艺
姜冠男
张彦召
方奎元
王彬峰
安英辉
黄平
周骁凌
王勇
魏巍
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Lingao Nuclear Power Co Ltd
Suzhou Nuclear Power Research Institute Co Ltd
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Lingao Nuclear Power Co Ltd
Suzhou Nuclear Power Research Institute Co Ltd
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Publication date
Application filed by Lingao Nuclear Power Co Ltd, Suzhou Nuclear Power Research Institute Co Ltd filed Critical Lingao Nuclear Power Co Ltd
Priority to CN202311230265.6A priority Critical patent/CN117387770A/en
Publication of CN117387770A publication Critical patent/CN117387770A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J11/00—Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/001—Energy harvesting or scavenging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Civil Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

The invention discloses a temperature monitoring device for an electric penetration piece of a nuclear power plant, which comprises an electromagnetic induction energy taking module, an energy management module, a standby battery, a temperature monitoring probe and a data processing module, wherein the energy taking module is used for taking energy from the power supply; the electromagnetic induction energy taking module, the standby battery, the temperature monitoring probe and the data processing module are respectively and electrically connected with the energy management module; the temperature monitoring probe is used for detecting the temperature of the electric penetration piece; the temperature monitoring probe is electrically connected with the data processing module, and the data processing module converts the data acquired by the temperature monitoring probe and outputs or stores the data; the electromagnetic induction energy-taking module is arranged on a connecting cable of the electric penetrating piece, and is used for generating induction current through induction of magnetic field changes around the connecting cable and outputting the induction current to the energy management module, and the energy management module rectifies and regulates the induction current and then outputs the induction current to the temperature monitoring probe and the data processing module. The temperature monitoring device provided by the invention can economically and effectively detect the temperature of the electric penetration piece for a long time.

Description

Temperature monitoring device for electric penetration piece of nuclear power plant
Technical Field
The invention relates to the technical field of environmental identification and state evaluation of electrical equipment in a nuclear power plant, in particular to a temperature monitoring device for an electrical penetration piece in the nuclear power plant.
Background
An electrical penetration is a special electrical installation mounted on the containment vessel of a nuclear power plant for the passage of cables through the containment vessel. And the safety barrier is formed as a part of the containment, so that the continuity and reliability of electric signals can be maintained under the normal service state and the design reference accident state of the reactor factory building and other factory building internal equipment, the integrity and the tightness of the pressure boundary can be maintained, and the leakage of radioactive substances can be prevented.
The electric penetration piece works under the rated current working condition for a long time, the conductor is heated up, and heat generated by the conductor is accumulated in the electric penetration piece barrel due to strict air tightness requirements of the electric penetration piece. The continuous high temperature environment gradually cracks the organic insulating material and the sealing material, and the insulating performance and the sealing performance gradually decrease, so that the electrical and mechanical functions of the electrical penetration assembly are affected. The traditional contact temperature measurement mode has the risk of damaging the physical structure of the measured object and affecting the normal operation of equipment. Therefore, it is necessary to develop a temperature monitoring device for the long-term operation of the electrical penetration, and to develop a corresponding temperature monitoring device, so as to ensure that the safety function requirements can be satisfied during the whole service life.
The above disclosure of background art is only for aiding in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of the present patent application, nor does it necessarily give technical teaching; the above background should not be used to assess the novelty and creativity of the present application without explicit evidence that the above-mentioned content was disclosed prior to the filing date of the present patent application.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a temperature monitoring device for an electric penetration piece of a nuclear power plant, which comprises the following specific technical scheme:
the temperature monitoring device for the electrical penetration assembly of the nuclear power plant comprises an electromagnetic induction energy taking module, an energy management module, a standby battery, a temperature monitoring probe and a data processing module; the electromagnetic induction energy taking module, the standby battery, the temperature monitoring probe and the data processing module are respectively and electrically connected with the energy management module;
the temperature monitoring probe is used for detecting the temperature of the electrical penetration piece; the temperature monitoring probe is electrically connected with the data processing module, and the data processing module converts the data acquired by the temperature monitoring probe and outputs or stores the converted data; the electromagnetic induction energy taking module is arranged on a connecting cable of the electric penetrating piece, and is used for generating induction current to output to the energy management module through inducing magnetic field changes around the connecting cable, and the energy management module rectifies and regulates the induction current and then outputs the induction current to the temperature monitoring probe and the data processing module.
When the induction current output by the electromagnetic induction energy taking module is smaller than a preset value, the energy management module takes electricity from the standby battery to supplement the energy supply deficiency of the electromagnetic induction energy taking module; when the induction current output by the electromagnetic induction energy taking module is larger than a preset value, the energy management module charges the standby battery to consume part of energy supply of the electromagnetic induction energy taking module.
Further, the electrical penetration is mounted on a containment vessel of a nuclear power plant, the electrical penetration comprising a barrel passing through the containment vessel, and a feedthrough passing through the barrel for accessing a cable within a junction box outside the containment vessel through a port assembly; the temperature monitoring probe adopts a non-contact infrared temperature measurement technology and is arranged at the end part of the cylinder body outside the safety shell of the electric penetration piece; and taking the collected temperature as the temperature of the outer surface of the end part of the cylinder body by the temperature monitoring probe, predicting to obtain the actual running temperature inside the cylinder body by combining with a preset temperature rise simulation test model of the electric penetrating piece under an off-line condition, and obtaining the temperature rise of the outer surface of the end part of the cylinder body and the temperature rise of the end part of the feed-through wire by combining with the temperature of the surrounding environment of the electric penetrating piece.
Further, the temperature monitoring device further comprises a microcontroller, and the microcontroller receives monitoring data of the temperature monitoring probe through the data processing module;
if the detected temperature rise of the outer surface of the end part of the cylinder is larger than a first preset value or the detected temperature rise of the end part of the feed-through wire is larger than a second preset value, the microcontroller outputs an alarm signal to a remote control room, wherein the first preset value is smaller than the second preset value.
Further, if the actual running temperature inside the cylinder is predicted to be larger than a third preset value, the microcontroller outputs an alarm signal to a remote control room.
Further, the microcontroller transmits the monitored temperature data to a remote control room for integrated display through a 4G/5G communication protocol.
Further, when the induction current output by the electromagnetic induction energy-taking module is smaller than a preset value and the electric quantity of the standby battery is smaller than the safe electric quantity, the microcontroller reduces the sampling frequency of the temperature monitoring probe; when the induction current output by the electromagnetic induction energy taking module is larger than a preset value and the electric quantity of the standby battery is full, the microcontroller improves the sampling frequency of the temperature monitoring probe.
Further, when the induction current output by the electromagnetic induction energy taking module is greater than a preset value and the standby battery is fully charged, the energy management module takes electricity from the standby battery and automatically disconnects the connection with the electromagnetic induction energy taking module, and when the electric quantity of the standby battery is reduced to the preset electric quantity, the electromagnetic induction energy taking module is automatically connected.
Further, when the microcontroller outputs an alarm signal, the microcontroller increases the sampling frequency of the temperature monitoring probe.
Further, the number of feed-throughs is plural, and a plurality of scattered feed-throughs are integrated by a port assembly to access the connection cable, which is located outside the containment vessel.
Further, the microcontroller is electrically connected with the energy management module, and the microcontroller can regulate and control the output voltage of the energy management module.
Compared with the prior art, the invention has the following advantages: the electrical penetration assembly is economically and effectively subjected to long-term temperature detection under the condition that the normal operation of the electrical penetration assembly is not affected.
Drawings
FIG. 1 is a schematic diagram of a temperature monitoring device according to an embodiment of the present invention;
fig. 2 is a schematic view of an installation structure of an electrical penetration assembly in a temperature monitoring device according to an embodiment of the present invention.
Wherein, the reference numerals are as follows: 1-containment, 2-cylinder, 3-feed-through.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
In one embodiment of the present invention, there is provided a temperature monitoring apparatus for an electrical penetration of a nuclear power plant, referring to fig. 1, including an electromagnetic induction energy taking module, an energy management module, a backup battery, a temperature monitoring probe, and a data processing module; the electromagnetic induction energy taking module, the standby battery, the temperature monitoring probe and the data processing module are respectively and electrically connected with the energy management module.
The temperature monitoring probe is used for detecting the temperature of the electrical penetration piece; the temperature monitoring probe is electrically connected with the data processing module, and the data processing module converts the data acquired by the temperature monitoring probe and outputs or stores the converted data; specifically, the temperature monitoring probe is an infrared temperature measuring probe, the task of the infrared temperature measuring probe is to convert heat radiation energy into an electric signal, and because the temperature measuring environment is complex, such as high temperature, water vapor, smoke dust, mechanical vibration and other factors affect the temperature measuring environment, a temperature measuring instrument with high anti-interference capability needs to be selected, and the device can be ensured to stably operate for a long time under a complex working condition so as to obtain a target electric signal with high signal to noise ratio. The infrared temperature measuring probe converts infrared radiation emitted by the conductor into an analog electrical signal through high-frequency sampling, and then digital-to-analog conversion is performed to obtain a digital signal for subsequent storage and processing; in addition, since the strength of the infrared signal is affected by distance and environmental conditions, noise and interference may exist in the signal, and digital-to-analog conversion technology is also involved in the process of filtering and amplifying the signal, so as to ensure reliable access of temperature measurement data.
The electromagnetic induction energy taking module is arranged on a connecting cable of the electric penetrating piece, and is used for generating induction current by inducing magnetic field changes around the connecting cable and outputting the induction current to the energy management module, and the energy management module rectifies and regulates the induction current and then outputs the rectified induction current to the temperature monitoring probe and the data processing module;
when the induction current output by the electromagnetic induction energy taking module is smaller than a preset value, the energy management module takes electricity from the standby battery to supplement the energy supply deficiency of the electromagnetic induction energy taking module; when the induction current output by the electromagnetic induction energy taking module is larger than a preset value, the energy management module charges the standby battery to consume part of energy supply of the electromagnetic induction energy taking module. Specifically, the electromagnetic induction energy taking module takes energy through the form of an electromagnetic induction coil, the electromagnetic induction coil is arranged on an outer sheath of the electric penetration piece connecting cable, and the electromagnetic induction energy taking module takes energy through the induction of a surrounding magnetic field. Because the current in the circuit has a large variation range, the current transformer may not be able to take energy, so that a standby battery is introduced to supply power for the circuit. When the operation current of the connecting cable is small, the electromagnetic induction energy taking module cooperates with the standby battery to supply power for the whole temperature monitoring device; when the connecting cable runs without current, the electromagnetic induction coil generates no induction current, and the standby battery independently supplies power for the temperature monitoring device; when the operation current of the connecting cable is overlarge, the energy-taking circuit supplies power for the temperature monitoring device, and simultaneously, residual electric energy is charged for the standby battery; when the operation circuit of the connecting cable is always in a larger current, the energy management module starts the variable frequency control and regulation system to output voltage, so that the output current is ensured to be stable within the limit value range of the subsequent load.
Because the induction current is sinusoidal alternating current, in order to meet the flatness requirement of the load on direct current voltage, the alternating current is converted into direct current through rectifying and filtering treatment so as to be used by a temperature monitoring probe; the voltage of the operation circuit may have a large range of variation, so that the voltage regulator can be connected to cope with voltage fluctuation and distortion in the decoupling process, and trigger pulses are accurately output for load operation, so that the energy management module can perform rectification and transformation regulation and control in the form of the voltage regulator.
In one embodiment of the invention, see fig. 2, the electrical penetration is mounted on the containment vessel of a nuclear power plant, the electrical penetration comprising a cylinder 2, a feed-through 3 and a junction box, the cylinder 2 passing through the concrete wall of the containment vessel 1, the junction box being arranged outside the containment vessel 1 and being connected to the cylinder 2, the feed-through 3 passing through the cylinder 2, which is connected to the cable outside the containment vessel inside the junction box by a port assembly, in particular the number of feed-throughs being a plurality, a plurality of discrete feed-throughs being integrated by a port assembly to access the connection cable; the temperature monitoring probe adopts a non-contact infrared temperature measurement technology and is arranged in the junction box; and taking the temperature detected by the temperature monitoring probe as the temperature of the outer surface of the end part of the cylinder, combining a preset electrical penetration piece temperature rise simulation test model to obtain the predicted temperature inside the cylinder, and combining the temperature of the surrounding environment of the electrical penetration piece to obtain the temperature rise of the outer surface of the end part of the cylinder and the predicted temperature rise inside the cylinder.
The temperature monitoring device in the embodiment adopts a non-contact infrared temperature measurement technology, utilizes the relation between the conductor temperature and the infrared radiation intensity to monitor and store temperature data, has the characteristics of high temperature resolution, high response speed and the like under the condition of not affecting the normal operation of an electric penetration piece, and does not interfere with the temperature distribution field of a measured object.
The non-contact infrared temperature measurement technology has the advantages of long-distance transmission, real-time monitoring, high measurement accuracy and the like, and can be widely applied to normal and abnormal electric penetrating members and working conditions related to reference accident transient and post-accident. The principle of the infrared temperature measurement technology is that a temperature probe is used for receiving infrared radiation of a target conductor, converting the infrared radiation into an analog electrical signal, then a sampling chip in a data processing module performs digital-to-analog conversion and stores the analog electrical signal into a digital signal, and a digital calculation of temperature compensation correction is performed by establishing a proportion model of radiation energy and conductor temperature, so that the surface temperature of a monitored object is obtained.
In combination with the specific working condition of long-term operation of the electric penetration assembly, the embodiment determines to supply power to the temperature monitoring device in an electromagnetic induction energy taking mode, and when a normal power supply line is cut off, the standby battery can be continuously supplied to the temperature monitoring device, so that real-time monitoring and collection of temperature sampling signals are guaranteed.
In one embodiment of the present invention, the temperature monitoring device further includes a microcontroller, where the microcontroller is electrically connected to the energy management module, the data processing module, and the temperature monitoring probe, and the microcontroller can regulate the output voltage of the energy management module and the frequency of use of the temperature monitoring probe, and enable the energy management module and the temperature monitoring probe to operate in coordination. The microcontroller transmits the monitored temperature data to a remote control room for integrated display in a wireless or wired mode through a 4G/5G communication protocol.
The microcontroller receives monitoring data of the temperature monitoring probe through the data processing module; if the detected temperature rise of the outer surface of the end part of the cylinder is larger than a first preset value or the detected temperature rise of the end part of the feed-through wire is larger than a second preset value, the microcontroller outputs an alarm signal to a remote control room, wherein the first preset value is smaller than the second preset value. The temperature rise is a value that the actual temperature of the temperature measuring component is higher than the ambient temperature, and the first preset value is smaller than the second preset value, for example, the first preset value is 15 ℃, and the second preset value is 30 ℃. If the actual running temperature inside the cylinder is predicted to be greater than a third preset value, the microcontroller outputs an alarm signal to a remote control room; wherein the third preset value is 70 ℃. When the microcontroller outputs an alarm signal, the microcontroller increases the sampling frequency of the temperature monitoring probe.
In one embodiment of the present invention, when the induced current output by the electromagnetic induction energy-obtaining module is smaller than a preset value and the electric quantity of the standby battery is smaller than a safe electric quantity, the microcontroller reduces the sampling frequency of the temperature monitoring probe so as to save the electric quantity; when the induction current output by the electromagnetic induction energy taking module is larger than a preset value and the electric quantity of the standby battery is full, the microcontroller increases the sampling frequency of the temperature monitoring probe so as to consume redundant electric quantity.
In an embodiment of the present invention, when the induced current output by the electromagnetic induction energy taking module is greater than a preset value and the standby battery is full, the energy management module takes electricity from the standby battery and automatically disconnects the connection with the electromagnetic induction energy taking module, and when the electric quantity of the standby battery is reduced to a preset electric quantity, the electromagnetic induction energy taking module is automatically connected.
The temperature monitoring device for the electric penetration piece of the nuclear power plant provided by the invention adopts an infrared temperature measurement technology to monitor the temperature of the end part of the cylinder body of the electric penetration piece, and combines with a temperature rise simulation test model of the electric penetration piece, thereby obtaining the temperature of the conductor in the cylinder of the electric penetration piece; through real-time and accurate sampling of temperature signals, a temperature database of the electric penetration piece under various operation conditions is established, and data support is provided for aging management and in-service state monitoring of the electric penetration piece.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention are directly or indirectly applied to other related technical fields, which are also included in the scope of the present invention.

Claims (10)

1. The temperature monitoring device for the electric penetration assembly of the nuclear power plant is characterized by comprising an electromagnetic induction energy taking module, an energy management module, a standby battery, a temperature monitoring probe and a data processing module; the electromagnetic induction energy taking module, the standby battery, the temperature monitoring probe and the data processing module are respectively and electrically connected with the energy management module;
the temperature monitoring probe is used for detecting the temperature of the electrical penetration piece; the temperature monitoring probe is electrically connected with the data processing module, and the data processing module converts the data acquired by the temperature monitoring probe and outputs or stores the converted data; the electromagnetic induction energy taking module is arranged on a connecting cable of the electric penetrating piece, and is used for generating induction current by inducing magnetic field changes around the connecting cable and outputting the induction current to the energy management module, and the energy management module rectifies and regulates the induction current and then outputs the rectified induction current to the temperature monitoring probe and the data processing module;
when the induction current output by the electromagnetic induction energy taking module is smaller than a preset value, the energy management module takes electricity from the standby battery to supplement the energy supply deficiency of the electromagnetic induction energy taking module; when the induction current output by the electromagnetic induction energy taking module is larger than a preset value, the energy management module charges the standby battery to consume part of energy supply of the electromagnetic induction energy taking module.
2. The temperature monitoring device of claim 1, wherein the electrical penetration is mounted on a containment vessel of a nuclear power plant, the electrical penetration comprising a barrel passing through the containment vessel, a feedthrough passing through the barrel that accesses a cable within an outside junction box of the containment vessel through a port assembly; the temperature monitoring probe adopts a non-contact infrared temperature measurement technology and is arranged at the end part of the cylinder body outside the safety shell of the electric penetration piece; and taking the collected temperature as the temperature of the outer surface of the end part of the cylinder body by the temperature monitoring probe, predicting to obtain the actual running temperature inside the cylinder body by combining with a preset temperature rise simulation test model of the electric penetrating piece under an off-line condition, and obtaining the temperature rise of the outer surface of the end part of the cylinder body and the temperature rise of the end part of the feed-through wire by combining with the temperature of the surrounding environment of the electric penetrating piece.
3. The temperature monitoring device of claim 2, further comprising a microcontroller that receives monitoring data of the temperature monitoring probe through the data processing module;
if the detected temperature rise of the outer surface of the end part of the cylinder is larger than a first preset value or the detected temperature rise of the end part of the feed-through wire is larger than a second preset value, the microcontroller outputs an alarm signal to a remote control room, wherein the first preset value is smaller than the second preset value.
4. A temperature monitoring device according to claim 3, wherein the microcontroller outputs an alarm signal to a remote control room if it is predicted that the actual operating temperature inside the barrel is greater than a third preset value.
5. A temperature monitoring device according to claim 3, wherein the microcontroller transmits the monitored temperature data to a remote control room for integrated display via a 4G/5G communication protocol.
6. The temperature monitoring device according to claim 3, wherein the microcontroller decreases the sampling frequency of the temperature monitoring probe when the induced current output by the electromagnetic induction energy taking module is smaller than a preset value and the electric quantity of the standby battery is smaller than a safe electric quantity; when the induction current output by the electromagnetic induction energy taking module is larger than a preset value and the electric quantity of the standby battery is full, the microcontroller improves the sampling frequency of the temperature monitoring probe.
7. The temperature monitoring device according to claim 1, wherein when the induced current output by the electromagnetic induction energy taking module is greater than a preset value and the standby battery is full, the energy management module takes electricity from the standby battery and automatically disconnects the electromagnetic induction energy taking module, and when the electric quantity of the standby battery is reduced to a preset electric quantity, the electromagnetic induction energy taking module is automatically connected.
8. A temperature monitoring device according to claim 3, wherein the microcontroller increases the sampling frequency of the temperature monitoring probe when the microcontroller outputs an alarm signal.
9. The temperature monitoring device of claim 2, wherein the number of feedthroughs is a plurality, and wherein a plurality of discrete feedthroughs are integrated through a port assembly to access the connection cable, the connection cable being outside the containment vessel.
10. The temperature monitoring device of claim 3, wherein the microcontroller is electrically connected to the energy management module, the microcontroller being capable of regulating an output voltage of the energy management module.
CN202311230265.6A 2023-09-22 2023-09-22 Temperature monitoring device for electric penetration piece of nuclear power plant Pending CN117387770A (en)

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CN202311230265.6A CN117387770A (en) 2023-09-22 2023-09-22 Temperature monitoring device for electric penetration piece of nuclear power plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311230265.6A CN117387770A (en) 2023-09-22 2023-09-22 Temperature monitoring device for electric penetration piece of nuclear power plant

Publications (1)

Publication Number Publication Date
CN117387770A true CN117387770A (en) 2024-01-12

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Application Number Title Priority Date Filing Date
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