Physical protection lighting system for nuclear power plant

Abstract

The embodiment of the invention provides a nuclear power plant physical protection lighting system, which is provided with a main power supply, an emergency power supply, and a first lighting module and a second lighting module which are respectively connected with the main power supply and the emergency power supply, and obtains power supply voltage between the main power supply and the first lighting module by means of a control switching module. The on-off state between the emergency power supply and the second lighting module is controlled based on the magnitude of the power supply voltage, so that only the main power supply supplies power to the first lighting module under the condition that the power supply voltage of the main power supply is normal, and the emergency power supply is automatically switched to supply power to the second lighting module when the power supply voltage of the main power supply is abnormal. The requirements of nuclear facility physical protection perimeter illumination and power supply reliability are met, meanwhile, electric quantity waste caused by simultaneous work of the two lamps is avoided, the effect of reducing the operation cost of a nuclear power plant is achieved, and the safety, reliability and energy saving performance are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of physical protection of nuclear power plants, and in particular to a physical protection lighting system for nuclear power plants. Background Art

[0002] Physical protection is a measure taken by nuclear power plants to prevent the illegal transfer and theft of nuclear materials, or sabotage of nuclear facilities. The system utilizes detection, delay, and response technologies and capabilities to establish a complete and effective security system. The system's goal is to effectively detect external intrusions, increase response time for response forces, and provide a safe and stable operating environment for nuclear power plants.

[0003] Nuclear power plant physical protection lighting systems are used to illuminate the physical protection perimeter, meeting the required illumination for the plant perimeter. However, existing nuclear power plant physical protection lighting systems operate in a manner that results in significant power waste. Therefore, developing a nuclear power plant physical protection lighting system that can reduce power consumption while leveraging existing lighting technologies has become a pressing issue for researchers in this field. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To achieve the above-mentioned purpose, the first aspect embodiment of the present application proposes a nuclear power plant physical protection lighting system for providing illumination to the physical protection area of ​​the nuclear power plant, including a main power supply and an emergency power supply, a first lighting module electrically connected to the main power supply, a second lighting module connected to the emergency power supply, and a control switching module connected to the first lighting module and the second lighting module, wherein the control switching module switches the on / off state between the emergency power supply and the second lighting module based on the supply voltage between the main power supply and the first lighting module.

[0006] Optionally, the control switching module includes a first switch unit and a second switch unit, and a control loop connected to the first switch unit and the second switch unit; wherein,

[0007] The first switch unit is arranged between the main power supply and the first lighting module, and the second switch unit is arranged between the emergency power supply and the second lighting module; the first switch unit is used to obtain the supply voltage of the main power supply to the first lighting module in real time, and when the supply voltage is less than a first threshold, turn on the control loop, and enable the second switch unit to switch the on-off state between the emergency power supply and the second lighting module to the on state.

[0008] Optionally, the first switch unit is a low voltage relay, and the second switch unit is a first contactor; wherein,

[0009] The low-voltage relay includes a voltage detection port and a first contact, the voltage detection port is connected to the circuit between the main power supply and the first lighting module, and the first contact is connected in series with the live wire of the control circuit;

[0010] The second switch unit includes a second contact and a coil loop. The second contact is connected in series between the emergency power supply and the second lighting module. The coil loop is connected in series with the live wire of the control loop.

[0011] Optionally, the first contact is a normally closed contact, and the second contact is a normally open contact associated with the first contact; wherein,

[0012] When the voltage detection port detects that the supply voltage is less than a first threshold voltage, the first contact performs a closing action;

[0013] The coil loop is conductive when the first contact is closed, and drives the second contact to perform a closing action.

[0014] Optionally, the control loop further includes a third switch unit connected in parallel to both ends of the first contact, and a fourth switch unit connecting the first contact and the third switch unit; wherein,

[0015] The third switch unit includes a third contact and a fourth contact connected in series; the fourth switch unit includes a fifth contact and a sixth contact connected in parallel;

[0016] The fifth contact is connected in series with the first contact, and the sixth contact is connected in series with the third contact and the fourth contact.

[0017] Optionally, the third contact, the fourth contact and the sixth contact are all normally open contacts, the fifth contact is a normally closed contact, and the sixth contact performs a closing action when the fifth contact performs an opening action.

[0018] Optionally, when the third contact, the fourth contact and the sixth contact jointly perform a closing action, the coil loop is turned on and drives the second contact to perform a closing action.

[0019] Optionally, the control loop further includes an indication unit, which is connected in parallel to both ends of the coil loop and outputs an indication signal when the coil loop is conductive.

[0020] Optionally, it further includes a first protection unit and a second protection unit, wherein the first protection unit is connected in series to the input end of the voltage detection port; and the second protection unit is connected in series to the input end of the second contact.

[0021] Optionally, it further includes a first switch and a second switch, wherein the first switch is connected in series between the main power supply and the first lighting module, and the second switch is connected in series between the emergency power supply and the second lighting module.

[0022] The nuclear power plant physical protection lighting system provided by this application has at least the following beneficial effects:

[0023] An embodiment of the present application provides a nuclear power plant physical protection lighting system, which is provided with a main power supply, an emergency power supply, and a first lighting module and a second lighting module respectively connected to the main power supply and the emergency power supply, and obtains the power supply voltage between the main power supply and the first lighting module by means of a control switching module, so as to control the on-off state between the emergency power supply and the second lighting module based on the magnitude of the power supply voltage, thereby realizing an operating mode in which only the main power supply supplies power to the first lighting module when the main power supply voltage is normal, and automatically switches to the emergency power supply to supply power to the second lighting module when the main power supply voltage is abnormal, thereby achieving the goal of meeting the perimeter illumination and power supply reliability requirements of the physical protection of nuclear facilities while avoiding the waste of electricity caused by the simultaneous operation of two lamps, thereby reducing the operating costs of the nuclear power plant, and achieving both safety, reliability and energy saving.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 The figure is a structural block diagram of a nuclear power plant physical protection lighting system according to an embodiment of the present application.

[0027] Figure 2 The figure is a structural diagram of a nuclear power plant physical protection lighting system according to an embodiment of the present application.

[0028] 110 Main power supply; 120 Emergency power supply; 130 First lighting module; 140 Second lighting module; 150 Control switching module; 151 First switch unit; 152 Second switch unit; 153 Third switch unit; 154 Fourth switch unit. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0030] As key locations for national security and energy supply, the security and protection of nuclear facilities is of paramount importance. Physical protection is a core component of the nuclear facility security and protection system. Physical protection areas within nuclear facilities typically utilize a zoning management model, specifically divided into control zones, protection zones, and critical zones. The protection requirements for each zone increase in importance. A nuclear power plant's physical protection lighting system is a crucial auxiliary facility for ensuring the effectiveness of zoning protection. It primarily illuminates the perimeter of the physical protection control zone, ensuring that the illumination within the plant perimeter at night meets security requirements and provides the basic environmental conditions for perimeter monitoring, intrusion detection, and other functions.

[0031] According to the industry standard "EJ / T 1054 Requirements for the Physical Protection of Nuclear Materials and Nuclear Facilities for Nuclear Security," perimeter lighting fixtures in protected areas and critical areas with higher protection levels must be configured with a dual-lamp, dual-circuit power supply. Based on this requirement, each light pole in these areas is typically equipped with two lighting fixtures, each powered by an independent power circuit. Specifically, one fixture is powered by the plant's normal power supply, while the other is powered by an emergency power supply (typically provided by a combination of a diesel engine and batteries). Based on standard design logic, under normal operating conditions, only one fixture is required to ensure that the average illumination level of the perimeter at night meets the specified requirements. The dual-lamp, dual-circuit configuration is primarily intended to ensure lighting continuity in the event of a power failure, thereby improving the reliability of the protection system.

[0032] However, in the actual operation of most domestic nuclear power plants, the dual lamps in the physical protection lighting system are usually operated simultaneously. Although this operation mode can meet the perimeter illumination requirements and to some extent avoid the risk of sudden failure that may occur when operating a single lamp, the power consumption of two lamps running simultaneously is much higher than the necessary power consumption of a single lamp. This results in significant power waste, does not meet energy conservation requirements, and also increases the operating costs of the nuclear power plant.

[0033] Based on the above problems, an embodiment of the present application provides a nuclear power plant physical protection lighting system, which sets a main power supply, an emergency power supply, and a first lighting module and a second lighting module respectively connected to the main power supply and the emergency power supply, and uses a control switching module to obtain the power supply voltage between the main power supply and the first lighting module, so as to control the on-off state between the emergency power supply and the second lighting module based on the size of the power supply voltage. It realizes an operating mode in which only the main power supply supplies power to the first lighting module when the main power supply voltage is normal, and automatically switches to the emergency power supply to supply power to the second lighting module when the main power supply voltage is abnormal. It achieves the goal of meeting the perimeter illumination and power supply reliability requirements of the physical protection of nuclear facilities while avoiding the waste of electricity caused by the simultaneous operation of two lamps, thereby reducing the operating costs of nuclear power plants and combining safety, reliability and energy saving.

[0034] According to one aspect of the present application, a nuclear power plant physical protection lighting system is provided for providing illumination to the physical protection area of ​​the nuclear power plant, such as Figure 1 As shown, the system includes a main power supply 110 and an emergency power supply 120, a first lighting module 130 electrically connected to the main power supply 110, a second lighting module 140 connected to the emergency power supply 120, and a control switching module 150 connected to the first lighting module 130 and the second lighting module 140. The control switching module 150 is configured to switch the on / off state between the emergency power supply 120 and the second lighting module 140 based on the supply voltage between the main power supply 110 and the first lighting module 130.

[0035] It is understandable that the main power supply 110 includes but is not limited to the normal power supply within the nuclear power plant, corresponding to the power supply of the first lighting module 130. The emergency power supply 120 includes but is not limited to an energy core of a generator, a battery or a combination of the two, corresponding to the power supply of the second lighting module 140. The first lighting module 130 and the second lighting module 140 include but are not limited to two groups of independent light-emitting devices, such as two groups of independent lamps. The control switching module 150 refers to an integrated unit capable of voltage monitoring and on-off control. Its core function is to convert the voltage state of the main power supply 110 into a control signal of the emergency circuit, and to build a dual-lamp dual-circuit dynamic response mechanism through the control signal.

[0036] For example, when the voltage supplied by the main power supply 110 to the first lighting module 130 is within the normal range, the control switching module 150 maintains the disconnection between the emergency power supply 120 and the second lighting module 140. At this point, only the first lighting module 130 operates, meeting the basic illumination requirements of the perimeter. Conversely, when the main power supply 110 voltage is abnormal (such as a power outage or undervoltage), the control switching module 150 immediately triggers the connection between the emergency power supply 120 and the second lighting module 140, achieving seamless lighting function.

[0037] In other words, this application utilizes physically isolated dual power supplies and dual lighting modules to ensure that a single power failure will not cause perimeter lighting failure, providing a continuous environmental guarantee for the physical protection of nuclear facilities. Furthermore, under normal operating conditions, the system operates with only one lamp, eliminating the energy consumption issues associated with traditional dual-lamp operation. This significantly reduces unnecessary power consumption and meets energy conservation and cost control requirements.

[0038] In some embodiments, the control switching module 150 includes a first switch unit 151 and a second switch unit 152, and a control circuit connected to the first switch unit 151 and the second switch unit 152. The first switch unit 151 is provided between the main power supply 110 and the first lighting module 130, and the second switch unit 152 is provided between the emergency power supply 120 and the second lighting module 140.

[0039] Since the first switch unit 151 is arranged between the main power supply 110 and the first lighting module 130, the first switch unit 151 can obtain the power supply voltage output by the main power supply 110 to the first lighting module 130 in real time, and turn on the control loop when the power supply voltage is less than the first threshold, thereby controlling the second switch unit 152 to turn on.

[0040] Furthermore, since the second switch unit 152 is provided between the emergency power supply 120 and the second lighting module 140 , the second switch unit 152 can switch the on / off state between the emergency power supply 120 and the second lighting module 140 from the off state to the on state when it is turned on.

[0041] As an example, the first switch unit 151 is a low-voltage relay, and the second switch unit 152 is a first contactor. The low-voltage relay includes a voltage detection port and a first contact S1. The voltage detection port is connected to the circuit between the main power supply 110 and the first lighting module 130. The first contact S1 is connected in series with the live wire of the control circuit. The second switch unit 152 includes a second contact S2 and a coil circuit. The second contact S2 is connected in series between the emergency power supply 120 and the second lighting module 140. The coil circuit is connected in series with the live wire of the control circuit. The first contact S1 is a normally closed contact, and the second contact S2 is a normally open contact associated with the first contact S1.

[0042] When the voltage detection port of the low-voltage relay detects that the main power supply 110's supply voltage is normal, the first contact S1 receives power and is disconnected. Because the first contact S1 is connected in series with the live wire of the control circuit, the disconnected first contact S1 prevents the control circuit from properly energizing, which in turn prevents the coil circuit of the second switch unit 152 from properly energizing, causing the second contact S2 to remain disconnected. As a result, the main power supply 110 supplies normal power to the first lighting module 130, while the emergency power supply 120 is disconnected from the second lighting module 140, achieving energy savings.

[0043] When the voltage detection port of the low-voltage relay detects an abnormal supply voltage from the main power supply 110 (e.g., a power outage or undervoltage), it triggers the relay, de-energizing the first contact S1 and switching it from an open state to a closed state. At this point, the live wire of the control circuit is connected through the first contact S1, energizing the coil circuit of the second switch unit 152. The coil generates electromagnetic force and drives the second contact S2 from an open state to a closed state. As a result, the emergency power supply 120 supplies power to the second lighting module 140 through the closed second contact S2, automatically switching from the main power supply 110 to the emergency power supply 120 and ensuring uninterrupted perimeter lighting.

[0044] In some embodiments, the control loop further includes a third switch unit 153 connected in parallel across the first contact S1 , and a fourth switch unit 154 connecting the first contact S1 and the third switch unit 153 .

[0045] As an example, the third switch unit 153 is a manual on / off push button switch, comprising a third contact S3 and a fourth contact S4 connected in series. The fourth switch unit 154 is a manual / automatic selector switch (SFH), comprising a fifth contact S5 and a sixth contact S6 connected in parallel. The third contact S3, the fourth contact S4, and the sixth contact S6 are all normally open contacts, while the fifth contact S5 is a normally closed contact. The fifth contact S5 is connected in series with the first contact S1 to form an automatic control branch, while the sixth contact S6 is connected in series with the third contact S3 and the fourth contact S4 to form a manual control branch. The sixth contact S6 closes when the fifth contact S5 opens.

[0046] Since both third contact S3 and fourth contact S4 are normally open, they remain disconnected unless an external trigger condition is applied, preventing current from flowing through third switch unit 153. Third switch unit 153 only conducts, allowing current to flow through this path, when both first contact S1 and second contact S2 are simultaneously closed. This series design increases the constraints on circuit conduction, preventing abnormal circuit conduction caused by malfunction of a single contact, thereby improving circuit reliability and stability.

[0047] Since the fifth contact S5 is a normally closed contact, it is normally closed, allowing current to flow through its path. The sixth contact S6 is a normally open contact, normally open. The fifth contact S5 is connected in series with the first contact S1. This ensures that the switching of the automatic control branch in which the fifth contact S5 resides is not only influenced by its own control logic but also by the voltage status of the main power supply 110. The sixth contact S6 is connected in series with the third contact S3 and the fourth contact S4 of the third switch unit 153. The corresponding manual control branch will only be switched on when the third contact S3 and the fourth contact S4 are simultaneously closed, and the sixth contact S6 is closed due to specific conditions.

[0048] Therefore, when the fifth contact S5 is in the closed state and the sixth contact S6 is in the open state, the fourth switch unit 154 is in the automatic mode. At this time, the current cannot pass through the automatic control branch composed of the fifth contact S5 and the first contact S1 in series. If no manual operation is performed, the third contact S3 and the fourth contact S4 remain open, and the path between the emergency power supply 120 and the second lighting module 140 will be in the disconnected state, and only the main power supply 110 will supply power to the first lighting module 130.

[0049] When the supply voltage of the main power supply 110 is abnormal, the first contact S1 is closed. If the fifth contact S5 remains closed (no manual intervention), the current will pass through the automatic control branch and trigger the second contact S2 to close, so that the emergency power supply 120 supplies power to the second lighting module 140, completing automatic switching.

[0050] When the fifth contact S5 is open and the sixth contact S6 is closed, the fourth switch unit 154 is in automatic mode. In manual mode, when manual switching to the emergency power supply 120 is required, the operator operates the third switch unit 153 and the fourth switch unit 154, causing the fifth contact S5 to open and the sixth contact S6 to close. At this point, if the third contact S3 and the fourth contact S4 are also closed under manual control, current can flow through the manual control branch formed by the series connection of the sixth contact S6, the third contact S3, and the fourth contact S4, triggering the closure of the second contact S2, allowing the emergency power supply 120 to power the second lighting module 140.

[0051] At the same time, since the fifth contact S5 is in the disconnected state, the automatic control branch is cut off, avoiding conflicts or malfunctions caused by the automatic control signal and manual control operation acting on the control loop at the same time, and ensuring stable operation and reliable switching of the circuit under different control modes.

[0052] In addition, real-time detection and automatic switching of voltage signals avoids the delay of manual intervention and improves the system's response speed to power failures. At the same time, the retained manual control function also enhances the system's operational flexibility under complex working conditions.

[0053] In some embodiments, the control loop further includes an indication unit, which is connected in parallel to both ends of the coil loop and outputs an indication signal when the coil loop is conductive.

[0054] As an example, the indicating unit is a signal indicator light, which is connected in parallel to both ends of the coil loop so that a light indication signal is outputted externally when the coil loop is turned on.

[0055] In some embodiments, the system further includes a first protection unit and a second protection unit, the first protection unit is connected in series to the input end of the voltage detection port, and the second protection unit is connected in series to the input end of the second contact S2.

[0056] As an example, the first protection unit and the second protection unit are fuses (commonly known as fuses).

[0057] In some embodiments, the system further includes a first switch and a second switch, wherein the first switch is connected in series between the main power supply 110 and the first lighting module 130 , and the second switch is connected in series between the emergency power supply 120 and the second lighting module 140 .

[0058] In summary, the embodiment of the present application provides a nuclear power plant physical protection lighting system, which is provided with a main power supply 110, an emergency power supply 120, and a first lighting module 130 and a second lighting module 140 respectively connected to the main power supply 110 and the emergency power supply 120, and obtains the power supply voltage between the main power supply 110 and the first lighting module 130 with the help of a control switching module 150, so as to control the on-off state between the emergency power supply 120 and the second lighting module 140 based on the size of the power supply voltage, thereby realizing an operating mode in which only the main power supply 110 supplies power to the first lighting module 130 when the power supply voltage of the main power supply 110 is normal, and automatically switches to the emergency power supply 120 to supply power to the second lighting module 140 when the power supply voltage of the main power supply 110 is abnormal, thereby achieving the goal of meeting the perimeter illumination and power supply reliability requirements of the physical protection of nuclear facilities while avoiding the waste of electricity caused by the simultaneous operation of two lamps, thereby reducing the operating costs of nuclear power plants, and having both safety, reliability and energy saving.

[0059] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

Claims

1. A nuclear power plant physical protection lighting system, used to provide lighting for the physical protection area of ​​a nuclear power plant, characterized in that: The device includes a main power supply and an emergency power supply, a first lighting module electrically connected to the main power supply, a second lighting module connected to the emergency power supply, and a control switching module connected to the first lighting module and the second lighting module. The control switching module switches the on / off state between the emergency power supply and the second lighting module based on the supply voltage between the main power supply and the first lighting module.

2. The system according to claim 1, wherein: The control switching module includes a first switch unit and a second switch unit, and a control loop connected to the first switch unit and the second switch unit; wherein, The first switch unit is arranged between the main power supply and the first lighting module, and the second switch unit is arranged between the emergency power supply and the second lighting module; the first switch unit is used to obtain the supply voltage of the main power supply to the first lighting module in real time, and when the supply voltage is less than a first threshold, turn on the control loop, and enable the second switch unit to switch the on-off state between the emergency power supply and the second lighting module to the on state.

3. The system according to claim 2, characterized in that The first switch unit is a low voltage relay, and the second switch unit is a first contactor; wherein, The low-voltage relay includes a voltage detection port and a first contact, the voltage detection port is connected to the circuit between the main power supply and the first lighting module, and the first contact is connected in series with the live wire of the control circuit; The second switch unit includes a second contact and a coil loop. The second contact is connected in series between the emergency power supply and the second lighting module. The coil loop is connected in series with the live wire of the control loop.

4. The system according to claim 3, characterized in that The first contact is a normally closed contact, and the second contact is a normally open contact associated with the first contact; wherein, When the voltage detection port detects that the supply voltage is less than a first threshold voltage, the first contact performs a closing action; The coil loop is conductive when the first contact is closed, and drives the second contact to perform a closing action.

5. The system according to claim 3, wherein: The control loop further includes a third switch unit connected in parallel to both ends of the first contact, and a fourth switch unit connecting the first contact and the third switch unit; wherein, The third switch unit includes a third contact and a fourth contact connected in series; the fourth switch unit includes a fifth contact and a sixth contact connected in parallel; The fifth contact is connected in series with the first contact, and the sixth contact is connected in series with the third contact and the fourth contact.

6. The system according to claim 5, characterized in that The third contact, the fourth contact, and the sixth contact are all normally open contacts, the fifth contact is a normally closed contact, and the sixth contact performs a closing action when the fifth contact performs an opening action.

7. The system according to claim 6, characterized in that When the third contact, the fourth contact, and the sixth contact jointly perform a closing action, the coil loop is turned on and drives the second contact to perform a closing action.

8. The system according to claim 3, wherein: The control loop further includes an indication unit, which is connected in parallel to both ends of the coil loop and outputs an indication signal when the coil loop is conductive.

9. The system according to claim 3, wherein: It also includes a first protection unit and a second protection unit, the first protection unit is connected in series to the input end of the voltage detection port; the second protection unit is connected in series to the input end of the second contact.

10. The system according to claim 1, wherein: It also includes a first switch and a second switch, wherein the first switch is connected in series between the main power supply and the first lighting module, and the second switch is connected in series between the emergency power supply and the second lighting module.

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