Accident lighting system
By setting up a switching mechanism and electrical isolation measures in the power plant's emergency lighting system, the mutual influence between AC and DC systems during power switching was resolved, ensuring the power plant's emergency lighting needs in the event of a complete loss of AC power and improving the safety and reliability of the DC power supply.
Patent Information
- Application Number
- CN202423059993.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In power plants, how can we prevent mutual interference between the AC and DC systems in the event of a complete loss of AC power for emergency lighting systems, while ensuring the safety and reliability of the DC system?
An emergency lighting system was designed, comprising first and second AC power supplies, a battery, a switching switch, a backup power circuit, and a control module. The system switches to the second AC power supply or the battery DC power supply when the AC power supply fails. A transformer is used to achieve electrical isolation between the AC and DC power supplies, and a diode is placed between the battery and the inverter to avoid mutual interference.
It enables emergency lighting to continue even in the event of a complete loss of AC power, avoids mutual interference during AC/DC switching, improves the safety and reliability of DC power supply, and solves the problem of false alarms due to DC power supply grounding.
Smart Images
Figure CN223694038U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lighting technical field especially relates to an accident lighting system. BACKGROUND
[0002] Many important work and living place because of work need specially add accident lighting device, in order to normal AC power interruption when using accident lighting device to run part of lighting, ensure normal lighting needs.
[0003] In power system, accident lighting is also a kind of technical measure of safety guarantee, and in power plant, accident lighting equipment is used to provide emergency lighting for the operation personnel area repair, maintenance, check equipment in the case of power plant AC power failure, so accident lighting cannot be used AC power supply alone, it must also have reliable DC power supply as standby power supply.Moreover, the DC system in power plant not only provides power supply for accident lighting when plant AC power failure, but also undertakes the task of providing reliable power supply for relay protection, automatic device, control signal etc.
[0004] When plant AC power failure, the reliability of DC system plays a vital role in the accident handling and safe operation of power plant, therefore, how to avoid the mutual influence between AC system and DC system when power plant accident lighting system AC-DC switching, and at the same time ensure the safety and reliability of DC system are the problems that need to be solved urgently. CONTENT OF UTILITY MODEL
[0005] The utility model discloses a kind of accident lighting systems, first AC power supply, second AC power supply and battery are provided, when first AC power supply power failure, switch to second AC power supply, in the case of first AC power supply and second AC power supply full failure, switch to the DC of battery, for the emergency lighting of operation personnel area repair, maintenance, check equipment emergency lighting of accident handling.
[0006] To solve the above technical problems, the utility model adopts the following technical scheme:
[0007] The utility model embodiment provides an accident lighting system, the lighting system includes: first switch, the input of first switch is connected first alternating current source, the input of first switch is connected first lighting switch, second lighting switch and third lighting switch respectively, the output of second switch, the input of first lighting switch, second lighting switch and third lighting switch are connected respectively, spare power supply circuit and battery, the input of spare power supply circuit is connected second alternating current source and battery respectively, the output of spare power supply circuit is connected the input of second switch, control module and detection module, control module is connected control first switch, second switch and spare power supply circuit respectively, detection module is connected detection first alternating current source, second alternating current source and battery power supply respectively, control module is connected receiving voltage detection value of detection module, when voltage detection value is lower than preset threshold value, then switch power supply.
[0008] In some embodiments, the spare power supply circuit includes a first transformer, a rectifier, an inverter and a second transformer, the primary coil of the first transformer is connected to the second alternating current source, the secondary coil of the first transformer is connected to the input of the rectifier, the output of the rectifier and the output of the battery are connected to the input of the inverter, the output of the inverter is connected to the primary coil of the second transformer, and the secondary coil of the second transformer is connected to the input of the second switch.
[0009] In some embodiments, the lighting system further includes a diode, the positive electrode of the diode is connected to the positive electrode of the battery, the negative electrode of the diode is connected to the positive input of the inverter, and the negative electrode of the battery is connected to the negative input of the inverter.
[0010] In some embodiments, the spare power supply circuit further includes a static switch, one end of the static switch is connected to the secondary coil of the second transformer, and the other end of the static switch is connected to the input of the second switch.
[0011] In some embodiments, the spare power supply circuit further includes a bypass module, a first input switch and a second input switch, the input of the first input switch and the second input switch is connected to the second alternating current source, the output of the first input switch is connected to the input of the bypass module, the output of the bypass module is connected to the input of the second switch, and the output of the second input switch is connected to the primary coil of the first transformer.
[0012] In some embodiments, the backup power supply circuit further comprises a first output switch and a second output switch, an input end of the first output switch is connected to an output end of the bypass module, an input end of the second output switch is connected to the other end of the static switch, an output end of the first output switch and an output end of the second output switch are connected to an input end of the second switching switch, and the control module is connected to control the static switch, the first input switch, the second input switch, the first output switch, the second output switch, a first lighting switch, a second lighting switch and a third lighting switch.
[0013] In some embodiments, a third input switch is arranged between the battery and the diode, and the control module is connected to control the third input switch.
[0014] In some embodiments, a first manual switch is arranged between the first switching switch and the first AC power supply, and a second manual switch is arranged between the backup power supply circuit and the second AC power supply.
[0015] In some embodiments, the first switching switch, the second switching switch, the first input switch, the second input switch, the third input switch, the first output switch, the second output switch, the first lighting switch, the second lighting switch and the third lighting switch are all relays.
[0016] According to the emergency lighting system provided in the embodiment of the present application, the following beneficial effects are achieved: the first AC power supply, the second AC power supply and the battery are arranged, when the first AC power supply loses power, the second AC power supply is switched to, and when the first AC power supply and the second AC power supply both lose power, the direct current of the battery is switched to, thereby providing emergency lighting for the operation personnel to perform area maintenance, maintenance and equipment inspection and handle accidents. The second input switch and the third input switch are arranged, and the diode is arranged between the battery and the inverter, thereby avoiding mutual influence between the AC power supply and the DC power supply during AC-DC switching in the emergency lighting system. The backup power supply circuit of the present application realizes electrical isolation of the AC power supply and the DC power supply through the first transformer and the second transformer, solves the defect of false alarm caused by DC power supply grounding during AC-DC switching in the emergency lighting system, improves the safety and reliability of the DC power supply, and has certain technical and economic benefits.
[0017] It should be understood that the foregoing general description and the following detailed description are only examples and do not limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0019] Figure 1 Circuit diagram of the emergency lighting system according to the embodiment;
[0020] Figure 2 Circuit diagram of the backup power supply according to the embodiment;
[0021] Figure 3 Connection block diagram of the control module and the detection module according to the embodiment. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.
[0023] The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0024] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.
[0025] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any number of manners, and are not limited to the examples described herein; rather, examples are provided as a description of example implementations and to provide a thorough and complete disclosure of example implementations as embodied in examples. The accompanying drawings are included to provide a further understanding of example implementations and are incorporated in and constitute a part of this detailed description. The drawings provided are for purposes of illustration only and merely exemplify example implementations.
[0026] The technical solutions of the embodiments of the present application will be described below:
[0027] According to some embodiments, as shown in Figure 1 、 Figure 3 The present application provides an emergency lighting system, the lighting system comprises:
[0028] The first switching switch K1 has its input end connected to the first AC power supply, and its output end connected to the input ends of the first lighting switch K11, the second lighting switch K12 and the third lighting switch K13 respectively.
[0029] The second switching switch K2 has its output end connected to the input ends of the first lighting switch K11, the second lighting switch K12 and the third lighting switch K13 respectively.
[0030] The backup power supply circuit has its input end connected to the second AC power supply and the battery respectively, and its output end connected to the input end of the second switching switch K2.
[0031] The control module is connected to control the first switching switch K1, the second switching switch K2 and the backup power supply circuit respectively, and the detection module is connected to detect the first AC power supply, the second AC power supply and the battery power supply respectively. The control module is connected to receive the voltage detection value of the detection module. When the voltage detection value is lower than the preset threshold value, the power supply is switched.
[0032] In some specific embodiments, the emergency lighting system of the present application is a UPS uninterrupted power supply. The first lighting switch K11 comprises a plurality of switches connected in parallel, the second lighting switch K12 comprises a plurality of switches connected in parallel, and the third lighting switch K13 also comprises a plurality of switches connected in parallel. The first AC power supply and the second AC power supply are 400V AC power, and the battery outputs 220V DC power. The battery is further connected to a charging circuit (not shown in the figure), which is controlled by the control module. When the control module detects that the battery power is insufficient through the detection module, the control module controls the charging circuit to charge the battery to store power.
[0033] The working principle of the above embodiment is that when the first AC power is normal, the control module controls the first switch K1 to be closed and the second switch K2 to be opened, and the first AC power is used to supply power to the lighting device.
[0034] When the first AC power is abnormal, the control module controls the first switch K1 to be opened and the second switch K2 to be closed, the backup power supply circuit is disconnected from the battery, and the second AC power is received, and the second AC power is used to supply power to the lighting device.
[0035] When the first AC power and the second AC power are both abnormal, the control module controls the first switch K1 to be opened and the second switch K2 to be closed, the backup power supply circuit is disconnected from the second AC power, and the battery power is received, and the battery is used to supply power to the lighting device.
[0036] The application is provided with the first AC power, the second AC power and the battery. When the first AC power loses power, the second AC power is switched to. In the case that the first AC power and the second AC power both lose power, the direct current of the battery is switched to, to provide emergency lighting for the operation personnel area to repair, maintain, check the equipment and handle the accident.
[0037] The following will be described in detail with reference to the accompanying drawings of the specification. Figures 1 to 3 The preferred embodiment of the present disclosure is further described in detail.
[0038] According to some embodiments, as shown in Figure 2 The backup power supply circuit includes a first transformer T1, a rectifier, an inverter and a second transformer T2, and the specific connection structure is as follows,
[0039] The primary coil of the first transformer T1 is connected to the second AC power, the secondary coil of the first transformer T1 is connected to the input end of the rectifier, the output end of the rectifier and the output end of the battery are connected to the input end of the inverter, the output end of the inverter is connected to the primary coil of the second transformer T2, and the secondary coil of the second transformer T2 is connected to the input end of the second switch K2.
[0040] The backup power supply circuit of the application realizes the electrical isolation of AC and DC power supply through the first transformer T1 and the second transformer T2, solves the defect of false alarm caused by AC and DC switching in the emergency lighting system, and improves the safety and reliability of the DC power supply.
[0041] According to some embodiments, as shown in Figure 2 The lighting system further includes a diode, the positive electrode of the diode is connected to the positive electrode of the battery, the negative electrode of the diode is connected to the positive input end of the inverter, and the negative electrode of the battery is connected to the negative input end of the inverter.
[0042] Diodes are arranged between the battery and the inverter to avoid mutual influence between the AC power supply and the DC power supply when AC-DC switching in the emergency lighting system.
[0043] According to some embodiments, as shown in Figure 2 The standby power supply circuit further comprises a static switch, one end of the static switch is connected to the secondary coil of the second transformer T2, and the other end of the static switch is connected to the input end of the second switching switch K2.
[0044] According to some embodiments, as shown in Figure 2 The standby power supply circuit further comprises a bypass module, a first input switch INK1 and a second input switch INK2, and the specific connection structure is as follows,
[0045] The input ends of the first input switch INK1 and the second input switch INK2 are connected to the second AC power supply, the output end of the first input switch INK1 is connected to the input end of the bypass module, the output end of the bypass module is connected to the input end of the second switching switch K2, and the output end of the second input switch INK2 is connected to the primary coil of the first transformer T1.
[0046] Further, as shown in Figure 2 The standby power supply circuit further comprises a first output switch OUTK1 and a second output switch OUTK2, and the specific connection structure is as follows,
[0047] The input end of the first output switch OUTK1 is connected to the output end of the bypass module, the input end of the second output switch OUTK2 is connected to the other end of the static switch, the output end of the first output switch OUTK1 and the output end of the second output switch OUTK2 are connected to the input end of the second switching switch K2, and the control module is connected to control the static switch, the first input switch INK1, the second input switch INK2, the first output switch OUTK1, the second output switch OUTK2, the first lighting switch K11, the second lighting switch K12 and the third lighting switch K13.
[0048] Further, as shown in Figure 2 The positive electrode of the battery and the positive electrode of the diode, and the negative electrode of the battery and the negative input end of the inverter are connected through a third input switch INK3, and the control module is connected to control the third input switch INK3.
[0049] Further, the first switching switch K1, the second switching switch K2, the first input switch INK1, the second input switch INK2, the third input switch INK3, the first output switch OUTK1, the second output switch OUTK2, the first lighting switch K11, the second lighting switch K12 and the third lighting switch K13 are all relays, so that the control module is isolated and controlled, and the isolation module is protected.
[0050] According to some embodiments, a first manual switch S1 is provided between the first switching switch K1 and the first AC power supply, and a second manual switch S2 is provided between the backup power supply circuit and the second AC power supply.
[0051] In the description of the foregoing embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0052] While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the words that have been used are words of description and illustration, rather than words of limitation. As previously mentioned, changes and modifications can be made to the embodiments described without departing from the spirit or scope of the application. Accordingly, the above description is intended to be illustrative only and not restrictive. The scope of the application should be determined not with reference to the above description, but should be given with reference to the appended claims, along with their full scope of equivalents.
Claims
1. An emergency lighting system, characterized in that The lighting system comprises: a first switching switch, an input end of the first switching switch is connected with a first alternating current power supply, and output ends of the first switching switch are respectively connected with input ends of first, second and third lighting switches; a second switching switch, output ends of the second switching switch are respectively connected with input ends of the first, second and third lighting switches; a standby power supply circuit and a battery, an input end of the standby power supply circuit is respectively connected with a second alternating current power supply and the battery, and an output end of the standby power supply circuit is connected with an input end of the second switching switch; a control module and a detection module, the control module is respectively connected with the first switching switch, the second switching switch and the standby power supply circuit, the detection module is respectively connected with the first alternating current power supply, the second alternating current power supply and the battery power supply, and the control module is connected with voltage detection values received by the detection module, and when the voltage detection values are lower than preset threshold values, the power supply is switched.
2. The lighting system of claim 1, characterized in that The standby power supply circuit comprises a first transformer, a rectifier, an inverter and a second transformer, a primary coil of the first transformer is connected with the second alternating current power supply, a secondary coil of the first transformer is connected with an input end of the rectifier, an output end of the rectifier and an output end of the battery are connected with an input end of the inverter, an output end of the inverter is connected with a primary coil of the second transformer, and a secondary coil of the second transformer is connected with an input end of the second switching switch.
3. The lighting system of claim 2, wherein, The lighting system further comprises a diode, a positive electrode of the diode is connected with a positive electrode of the battery, a negative electrode of the diode is connected with a positive input end of the inverter, and a negative electrode of the battery is connected with a negative input end of the inverter.
4. The lighting system of claim 3, wherein, The standby power supply circuit further comprises a static switch, one end of the static switch is connected with the secondary coil of the second transformer, and the other end of the static switch is connected with the input end of the second switching switch.
5. The lighting system of claim 4, wherein, The standby power supply circuit further comprises a bypass module, a first input switch and a second input switch, input ends of the first input switch and the second input switch are connected with the second alternating current power supply, an output end of the first input switch is connected with an input end of the bypass module, an output end of the bypass module is connected with the input end of the second switching switch, and an output end of the second input switch is connected with the primary coil of the first transformer.
6. The lighting system of claim 5, characterized in that The standby power supply circuit further comprises a first output switch and a second output switch, an input end of the first output switch is connected with an output end of the bypass module, an input end of the second output switch is connected with the other end of the static switch, and output ends of the first output switch and the second output switch are connected with the input end of the second switching switch, and the control module is connected with the static switch, the first input switch, the second input switch, the first output switch, the second output switch, the first lighting switch, the second lighting switch and the third lighting switch.
7. The lighting system of claim 6, characterized in that A third input switch is arranged between the positive electrode of the battery and the positive electrode of the diode and between the negative electrode of the battery and the negative input end of the inverter, and the control module is connected with the third input switch.
8. The lighting system of claim 1, wherein, A first manual switch is arranged between the first switching switch and the first AC power supply, and a second manual switch is arranged between the standby power supply circuit and the second AC power supply.
9. The lighting system of claim 7, wherein, The first switching switch, the second switching switch, the first input switch, the second input switch, the third input switch, the first output switch, the second output switch, the first lighting switch, the second lighting switch and the third lighting switch are all relays.