CN113904437A - Display instrument for loss condition of uninterrupted power supply of nuclear power plant - Google Patents
Display instrument for loss condition of uninterrupted power supply of nuclear power plant Download PDFInfo
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- CN113904437A CN113904437A CN202111328860.4A CN202111328860A CN113904437A CN 113904437 A CN113904437 A CN 113904437A CN 202111328860 A CN202111328860 A CN 202111328860A CN 113904437 A CN113904437 A CN 113904437A
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- Prior art keywords
- power supply
- power
- management circuit
- internal
- display instrument
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- 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
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- 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
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a display instrument used under the condition that an uninterrupted power supply of a nuclear power plant loses, which comprises a built-in internal power supply and a power supply management circuit; the power management circuit is used for power management of the whole display instrument; the internal power supply and the external power supply are both connected to the power management circuit; the power management circuit controls an external power supply to supply power when monitoring that the nuclear power plant normally operates; and when the loss of the external power supply is monitored, controlling the internal power supply to supply power. The invention can automatically switch to the internal power supply seamlessly when the external direct current voltage is lost to continuously provide the power supply for the external transmitter, thereby improving the safety.
Description
Technical Field
The invention belongs to the technical field of post-accident monitoring and displaying of nuclear power plants, and particularly relates to a display instrument for a nuclear power plant under the condition of loss of an uninterrupted power supply.
Background
In order to realize post-accident monitoring of a nuclear power plant, an uninterruptible power supply is required to be arranged to supply power to a measuring instrument, a processing device and a display instrument which are monitored after an accident. The current post-accident monitoring design is generally that a DCS system supplies power to a measuring instrument and collects signals, and the signals are displayed in a display instrument. The DCS and the display system are complex in equipment and high in power consumption, so that the capacity requirement of the whole uninterruptible power supply for monitoring after an accident is high, and the Fudao accident shows that the uninterruptible power supply system of the power plant after the accident is difficult to supply power to the monitoring instrument after the accident for a long time. In order to realize the long-term availability of the post-accident monitoring instrument, it is necessary to design a post-accident monitoring instrument which can still work after the loss of the uninterruptible power supply.
Disclosure of Invention
The invention provides a display instrument for a nuclear power plant uninterruptible power supply loss condition, which aims to solve the problem that an existing nuclear power plant uninterruptible power supply system after an accident is difficult to supply power to a monitoring instrument after the accident for a long time. The invention can automatically switch to the internal power supply seamlessly when the external direct current voltage is lost to continuously provide the power supply for the external transmitter, thereby improving the safety.
The invention is realized by the following technical scheme:
the display instrument used for the loss condition of the uninterrupted power supply of the nuclear power plant comprises a built-in internal power supply and a power supply management circuit;
the power management circuit is used for power management of the whole display instrument; the internal power supply and the external power supply are both connected to the power management circuit;
the power management circuit controls an external power supply to supply power when monitoring that the nuclear power plant normally operates; and when the loss of the external power supply is monitored, controlling the internal power supply to supply power.
Preferably, the external power supply of the present invention employs a 24V DC power supply.
Preferably, the internal power supply of the invention adopts a lithium ion battery with the capacity of 2500 mAH;
the output of the lithium ion battery is boosted to 24V DC by the power management circuit and then supplied with power;
and the power supply management circuit is used for carrying out charge and discharge management on the lithium ion battery.
Preferably, the power management circuit of the present invention monitors and controls the voltage and capacity of the external power supply and the internal power supply in real time.
Preferably, the control process of the power management circuit of the present invention includes:
when the external power supply supplies power, if the electric quantity of the internal power supply is detected to be lower than the preset electric quantity threshold value, the internal power supply is automatically charged until the electric quantity of the internal power supply is higher than the preset electric quantity threshold value, and then the charging is stopped.
Preferably, the control process of the power management circuit of the present invention includes:
when the internal power supply supplies power, if the voltage of the internal power supply is detected to be lower than a preset voltage threshold value, the display is automatically closed.
Preferably, the power management circuit of the present invention is capable of outputting 24V DC to power an external two-wire meter.
Preferably, the power management circuit of the invention can also output 3.3V DC for supplying power to the MCU and the LED driving device inside the display instrument.
Preferably, the invention sets up the sampling resistance on the external two-wire system instrument signal loop;
the voltage signal on the sampling resistor is collected and converted into a digital signal by an ADC (analog to digital converter) integrated by an internal MCU (micro control unit), and the digital signal is transmitted to the internal MCU for processing to obtain a corresponding LED display code and is transmitted to an LED driving circuit to drive an LED to display.
Preferably, the power management circuit of the present invention automatically controls to turn down the LED display brightness to reduce power consumption when the power is supplied by the internal power supply.
The invention has the following advantages and beneficial effects:
1. when an external power supply is lost, the battery carried in the equipment can be used for supplying power for more than 72h for the equipment; when the external power is recovered, the power supply can be automatically switched to the external power supply.
2. The display digit of the invention can reach 4 digits, and the display precision is not less than +/-0.25%.
3. When the invention uses the internal battery to supply power, the display brightness is automatically reduced, and the battery power supply time is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic block diagram of a display meter of the present invention.
Detailed Description
Hereinafter, the term "comprising" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
The embodiment provides a display instrument for a loss condition of an uninterruptible power supply of a nuclear power plant, and the display instrument comprises a built-in internal power supply and a power management circuit, as shown in fig. 1.
The power management circuit is used for power management of the whole display instrument; the internal power supply and the external power supply are both connected to the power management circuit;
the power management circuit controls an external power supply to supply power when monitoring that the nuclear power plant normally operates; and when the loss of the external power supply is monitored, controlling the internal power supply to supply power.
The power management circuit is used for power management of the whole display instrument, and comprises power state monitoring and internal power supply charging and discharging control.
The internal power supply of this embodiment adopts a lithium ion battery, and the lithium ion battery outputs the voltage that is boosted to 24VDC and then supplies power to the display instrument.
The external power supply of the present embodiment employs a 24V DC power supply.
The power management circuit of the present embodiment monitors and controls the voltage and capacity of the external power supply and the internal power supply in real time. The specific control process comprises the following steps:
when the external power supply supplies power, if the electric quantity of the internal power supply is detected to be lower than a preset electric quantity threshold value, the internal power supply is automatically charged; and stopping charging until the electric quantity of the internal power supply is higher than a preset electric quantity threshold value.
When the internal power supply supplies power, if the voltage of the internal power supply is detected to be lower than the preset voltage threshold, the display is automatically closed, and the error display is prevented.
The external power supply and the internal power supply are both connected to the power management circuit, so that the power management circuit can output 24V DC to supply power to an external two-wire instrument (such as a pressure transmitter), charge and discharge management is carried out on a lithium ion battery with the capacity of 2500mAH built in the display instrument, and the power management circuit also outputs 3.3VDC for power supply of devices such as MCU (microprogrammed control Unit) and LED (light-emitting diode) control devices in the display instrument.
The display instrument of the embodiment further comprises a sampling resistor with the resistance value of 100 omega and the precision of 0.1 percent and an ADC integrated in the display instrument, wherein the sampling resistor is arranged on a 4 mA-20 mA signal loop of the external two-wire instrument, and the ADC is used for collecting voltage signals on the sampling resistor.
The ADC converts the voltage signal on the sampling resistor into a digital signal and transmits the digital signal to the MCU for processing to obtain a physical quantity value corresponding to the digital signal and an LED display code corresponding to the physical quantity value, and the MCU transmits the LED display code to the LED drive circuit to drive the 4-bit LED to display.
In the display instrument, the MCU in the display instrument adopts an ARM microprocessor with low power consumption, and a 12-bit ADC is integrated in the MCU.
When the display instrument of this embodiment is supplied power by external power supply, LED shows luminance brighter, and when external power supply loses and uses the power supply of inside power supply, through the automatic LED that reduces of power management circuit display luminance in order to reduce power consumption, extension inside power supply life.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The display instrument used under the condition that the uninterrupted power supply of the nuclear power plant is lost is characterized by comprising a built-in internal power supply and a power supply management circuit;
the power management circuit is used for power management of the whole display instrument; the internal power supply and the external power supply are both connected to the power management circuit;
the power management circuit controls an external power supply to supply power when monitoring that the nuclear power plant normally operates; and when the loss of the external power supply is monitored, controlling the internal power supply to supply power.
2. The display instrument for nuclear power plant uninterruptible power supply loss condition of claim 1, wherein the external power supply source is 24V DC power.
3. The display instrument for nuclear power plant uninterruptible power supply loss condition of claim 1, wherein the internal power supply employs a lithium ion battery with a capacity of 2500 mAH;
the output of the lithium ion battery is boosted to 24V DC by the power management circuit and then supplied with power;
and the power supply management circuit is used for carrying out charge and discharge management on the lithium ion battery.
4. The display instrument for nuclear power plant uninterruptible power supply loss conditions of claim 1, wherein the power management circuit monitors and controls the voltage and capacity of the external power supply and the internal power supply in real time.
5. The display instrument for nuclear power plant uninterruptible power supply loss condition of claim 4, wherein the control process of the power management circuit includes:
when the external power supply supplies power, if the electric quantity of the internal power supply is detected to be lower than the preset electric quantity threshold value, the internal power supply is automatically charged until the electric quantity of the internal power supply is higher than the preset electric quantity threshold value, and then the charging is stopped.
6. The display instrument for nuclear power plant uninterruptible power supply loss condition of claim 4, wherein the control process of the power management circuit includes:
when the internal power supply supplies power, if the voltage of the internal power supply is detected to be lower than a preset voltage threshold value, the display is automatically closed.
7. The display meter for nuclear power plant uninterruptible power supply loss conditions of any of claims 1-6, wherein the power management circuit is capable of outputting 24V DC to power the external two-wire meter.
8. The display instrument for nuclear power plant uninterruptible power supply loss condition of claim 7, wherein the power management circuit is further capable of outputting 3.3V DC for power supply of MCU and LED driving device inside the display instrument.
9. The display meter for nuclear power plant uninterruptible power supply loss conditions of claim 8, wherein a sampling resistor is provided on an external two-wire meter signal loop;
the voltage signal on the sampling resistor is collected and converted into a digital signal by an ADC (analog to digital converter) integrated by an internal MCU (micro control unit), and the digital signal is transmitted to the internal MCU for processing to obtain a corresponding LED display code and is transmitted to an LED driving circuit to drive an LED to display.
10. The display instrument for nuclear power plant uninterruptible power supply loss conditions of any of claims 1 to 6, wherein the power management circuit automatically controls to turn down the LED display brightness to reduce power consumption when powered by an internal power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111328860.4A CN113904437A (en) | 2021-11-10 | 2021-11-10 | Display instrument for loss condition of uninterrupted power supply of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111328860.4A CN113904437A (en) | 2021-11-10 | 2021-11-10 | Display instrument for loss condition of uninterrupted power supply of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113904437A true CN113904437A (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111328860.4A Withdrawn CN113904437A (en) | 2021-11-10 | 2021-11-10 | Display instrument for loss condition of uninterrupted power supply of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113904437A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393629A (en) * | 2014-09-30 | 2015-03-04 | 中国电子科技集团公司第四十一研究所 | Intelligent power supply management circuit of digital oscillograph |
| CN112526954A (en) * | 2020-12-23 | 2021-03-19 | 福建福清核电有限公司 | Nuclear power plant instrument emergency monitoring device and method |
-
2021
- 2021-11-10 CN CN202111328860.4A patent/CN113904437A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393629A (en) * | 2014-09-30 | 2015-03-04 | 中国电子科技集团公司第四十一研究所 | Intelligent power supply management circuit of digital oscillograph |
| CN112526954A (en) * | 2020-12-23 | 2021-03-19 | 福建福清核电有限公司 | Nuclear power plant instrument emergency monitoring device and method |
Non-Patent Citations (2)
| Title |
|---|
| 何小明;李仁杰;于宏伟;王江波;: "核电厂仪控系统不间断电源冗余方案的研究及维护", 仪器仪表用户, no. 01, pages 1281 * |
| 史松梅;卞伏虎;: "UPS装置存在的问题分析", 电力安全技术, no. 04 * |
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Application publication date: 20220107 |
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| WW01 | Invention patent application withdrawn after publication |