Illuminating system used when workshop of pumped storage power station is flooded with water

Abstract

The utility model discloses a lighting system for a pumped storage power station when a plant is flooded. The lighting system comprises a monitoring water level gauge, a flooded plant control terminal, a signal cable, a flooded plant lighting box, a relay, a contactor, a circuit breaker, a loop power supply, a voltage conversion device, a flooded plant lamp and the like. The illumination linkage system is arranged by combining the use environment and requirements of illumination of the flooded factory building, so that when the flooded factory building occurs, the illumination system of the flooded factory building can accurately respond and guide personnel to escape under the condition that a normal illumination system and a standby illumination system cannot continue to work, and conditions can be created for rescue personnel to search and rescue on site after an accident occurs.

Description

Technical Field

[0001] This utility model relates to the field of hydropower engineering, specifically a lighting system for a pumped storage power station when the powerhouse is flooded. Background Technology

[0002] A pumped-storage hydroelectric power station is a type of hydroelectric power station that pumps water during periods of low electricity demand and releases it to generate electricity during periods of high electricity demand. It consists of an underground powerhouse, a switchyard, and upper and lower reservoirs.

[0003] Existing pumped-storage power station flood-prone building lighting fixtures operate in a continuous-on mode, lacking precise control signal input. This continuous-on mode can easily mislead people into believing a flooding accident has occurred, causing unnecessary panic. Furthermore, underwater lights, in order to achieve better penetration and illumination while minimizing light scattering in water, often have narrow beam angles, concentrated beam curves, and low installation heights. Therefore, under normal circumstances, this can produce glare, which can affect personnel's work and maintenance to some extent. Prolonged operation also shortens the lifespan of the lights. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lighting system for pumped storage power stations that can be automatically turned on, has good lighting effect, high reliability and strong practicality, in light of the current state of the technology.

[0005] This utility model is achieved through the following technical solution: a lighting system for a pumped storage power station when the powerhouse is flooded, including a water level monitoring gauge, a flooded powerhouse control terminal, signal cables, a flooded powerhouse lighting box, a voltage conversion device, and flooded powerhouse lamps;

[0006] The monitoring water level gauge is used to monitor the water level changes at the bottom of the underground plant and upload the water level data to the flooded plant control terminal.

[0007] The flooded plant control terminal is used to receive water level signals from each monitoring water level gauge and send out dry contact signals.

[0008] The signal cable is used to transmit dry contact signals in the flooded factory building;

[0009] The flooded factory building lighting box is used to power the lights in the flooded factory building. The incoming power supply is drawn from the emergency lighting system and the ground switch station's common power system, and it is equipped with a dual power supply switching device.

[0010] The voltage conversion device is used to convert AC 220V voltage into DC 24V safety extra-low voltage, which is then supplied to the lighting fixtures in the flooded factory building.

[0011] The aforementioned flood-prone factory lighting fixtures are used for evacuation lighting at the main escape routes when the factory is flooded.

[0012] The flooded plant lighting box is equipped with a dry contact switch, relay, contactor, circuit breaker, and circuit power supply. The dry contact switch receives dry contact signals from the flooded plant control terminal. The relay is connected to the lower port of the circuit breaker to control the opening and closing of the output circuit. The normally open contacts of the contactor are connected in parallel to both sides of the dry contact switch to form a self-locking circuit. The circuit breaker is in a continuously conducting state. The circuit power supply provides power to the relay and contactor and is in a continuously conducting state. When the water level monitoring gauge does not collect an abnormal water level signal and the flooded plant control terminal does not output a dry contact signal, the dry contact switch is open, the circuit inside the flooded plant lighting box is not connected, and the flooded plant lights do not light up.

[0013] When the water level monitoring gauge collects abnormal water level signals and uploads them to the flooded plant control terminal, the flooded plant control terminal inputs a dry contact signal to the dry contact switch of the flooded plant lighting box. When the dry contact switch closes, the circuit inside the flooded plant lighting box is connected, and the flooded plant lights are turned on.

[0014] The monitoring water level gauge is installed at the bottom of the underground powerhouse of the pumped storage power station.

[0015] The flooded factory building lighting box is installed inside the emergency refuge tunnel on the top of the underground factory building.

[0016] The flooded factory building lighting box contains multiple sets of relays and circuit breakers connected in parallel.

[0017] This invention offers the following advantages: The flood-prone factory lighting system features precise input of flood control signals, enabling it to better fulfill its emergency lighting and warning functions. Furthermore, the addition of contactors and other electrical components within the flood-prone factory lighting box creates a self-locking circuit, ensuring the safety and reliability of the lighting circuit and guaranteeing lighting for subsequent emergency rescue operations. Attached Figure Description

[0018] Figure 1 This is the wiring diagram for the lighting system of the present invention used in a pumped storage power station when the plant is flooded.

[0019] Figure 2 This is the wiring diagram for the flooded factory lighting box of this utility model.

[0020] Figure 3 This is a schematic diagram of the water level monitoring gauge in an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the flooded factory control terminal in an embodiment of this utility model.

[0022] Figure 5 This is a schematic diagram of the flooded factory lighting box in an embodiment of this utility model.

[0023] In the diagram, 1-water level gauge; 2-flooded factory control terminal; 3-signal cable; 4-flooded factory lighting box; 5-dry contact switch; 6-relay; 7-contaminator; 8-circuit breaker; 9-circuit power supply; 10-voltage conversion device; 11-flooded factory lighting fixture; 12-dual power supply switching device. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The electrical devices and controllers described in this utility model are all conventional setups, and the electrical connections are also conventional connections.

[0028] like Figure 1 As shown, the present invention provides a lighting system for a pumped storage power station when the powerhouse is flooded, including a water level monitoring gauge 1, a flooded powerhouse control terminal 2, a signal cable 3, a flooded powerhouse lighting box 4, a voltage conversion device 10, and a flooded powerhouse lamp 11.

[0029] The monitoring water level gauge 1 is used to monitor the water level changes at the bottom of the underground plant and upload the water level data to the flooded plant control terminal 2.

[0030] The flooded plant control terminal 2 is used to receive water level signals from each monitoring water level gauge 1 and send out dry contact signals.

[0031] The signal cable 3 is used to transmit the dry contact signal of the flooded factory building;

[0032] The flooded factory building lighting box 4 is used to power the flooded factory building lighting fixtures 11. The incoming power supply is drawn from the emergency lighting system and the ground switch station common power system, and is equipped with a dual power supply switching device 12.

[0033] The voltage conversion device 10 is used to convert AC 220V voltage into DC 24V safety extra-low voltage, and the voltage conversion is used to supply the lighting fixtures 11 in the flooded factory building.

[0034] The flooded factory building light fixture 11 is used for evacuation lighting at the main escape routes when the factory building is flooded.

[0035] like Figure 2 As shown, the flooded factory lighting box 4 is equipped with a dry contact switch 5, a relay 6, a contactor 7, a circuit breaker 8, and a circuit power supply 9. The dry contact switch 5 is used to receive the dry contact signal sent by the flooded factory control terminal 2; the relay 6 is connected to the lower port of the circuit breaker 8 to control the opening and closing of the output circuit; the normally open contact of the contactor 7 is connected in parallel to both sides of the dry contact switch 5 to form a self-locking circuit; the circuit breaker 8 is in a continuously conducting state; the circuit power supply 9 provides power to the relay 6 and the contactor 7 and is in a continuously conducting state; when the water level monitoring gauge 1 does not collect an abnormal water level signal and the flooded factory control terminal 2 does not output a dry contact signal, the dry contact switch 5 is opened, the circuit in the flooded factory lighting box 4 is not connected, and the flooded factory light fixture 11 is not lit.

[0036] When the water level monitoring gauge 1 collects abnormal water level signals and uploads them to the flooded plant control terminal 2, the flooded plant control terminal 2 inputs the dry contact signal to the dry contact switch 5 of the flooded plant lighting box 4. When the dry contact switch closes, the circuit inside the flooded plant lighting box 4 is connected, and the flooded plant lighting fixture 11 is lit.

[0037] like Figure 3 As shown, the monitoring water level gauge 1 is installed at the bottom of the underground powerhouse of the pumped storage power station.

[0038] like Figure 4 , 5 As shown, the flooded factory building lighting box 4 is installed inside the emergency refuge tunnel on the top of the underground factory building.

[0039] Preferably, the flooded factory lighting box 4 is connected in parallel with multiple sets of relays 6 and circuit breakers 8.

[0040] The water level monitoring gauge described in this invention is connected to a flooded plant control terminal via a relevant control cable. The flooded plant control terminal outputs a dry contact signal to the flooded plant lighting box. The flooded plant lighting box contains a dry contact switch, relays, contactors, and circuit breakers. Each output circuit within the box is electrically connected to a voltage conversion device, which outputs a safe 24V DC low-voltage circuit to the flooded plant lighting fixtures. By collecting abnormal water level signals from the monitoring gauge and uploading them to the flooded plant control terminal, the control terminal inputs the dry contact signal to the dry contact switch in the flooded plant lighting box, causing the dry contact switch to close, thus completing the circuit within the box. A self-locking circuit is formed through contactors and other electrical components to prevent the dry contact switch from opening due to signal loss caused by flooding.

[0041] Specifically, such as Figure 3 As shown, the underground powerhouse of the pumped storage power station is located inside the mountain and between the upper and lower reservoirs. There is a risk of water seepage from the rock mass and leakage from the equipment, and even the risk of flooding of the powerhouse. Therefore, a monitoring water level gauge 1 is installed in the tailrace pipe layer of the underground powerhouse to monitor the water level changes at the bottom of the powerhouse. When an abnormal water level is detected (too high or too high), the monitoring water level gauge 1 will send a dry contact signal to the flooded powerhouse control terminal 2.

[0042] like Figure 4 As shown, a flood control terminal 2 is installed in the control room of the underground auxiliary plant. It is used to receive the dry contact signal sent by the monitoring water level gauge 1 and output the dry contact signal to the dry contact switch 5 through the signal cable 3.

[0043] like Figure 5 As shown, a flood-prone factory lighting box 4 is installed inside the emergency refuge tunnel on the top of the underground factory building. The flood-prone factory lighting box 4 includes a dry contact switch 5, a relay 6, a contactor 7, a circuit breaker 8, and a circuit power supply 9. Voltage conversion devices 10 and flood-prone factory lighting fixtures 11 are also installed at other top locations of the underground factory building, such as on the arched walkway.

[0044] The operation mode is as follows: When no signal is received from the dry contact of the flooded factory building, the dry contact switch 5 is open, the moving contact of the relay 6 is engaged with the normally closed contact, the lighting circuit of the flooded factory building is not connected, and the light fixture 11 in the flooded factory building is not lit.

[0045] When an abnormal water level (too high or too high) is detected, the water level gauge 1 will send a dry contact signal to the flooded plant control terminal 2. The flooded plant control terminal 2 will output a dry contact signal and connect it to the dry contact switch 5 via the signal cable 3. After receiving the dry contact signal from the flooded plant, the dry contact switch 5 will close, the circuit inside the box will be connected, the relay 6 will activate the auxiliary contact, and the output circuit of the circuit breaker 8 will be connected. Then, the voltage conversion device 10 will complete the safe voltage conversion of the lighting circuit, and finally light up the flooded plant lighting fixture 11.

[0046] Since the installation elevation of the flooded factory control terminal 2 may be slightly lower than that of the flooded factory lighting box 4, to prevent power outages in the flooded factory lighting circuit due to signal loss during flooding, parallel wires are connected to the two normally open contacts of the contactor 7 on both sides of the dry contact switch 5. When the dry contact switch is closed and the circuit is conducting, the coils of the relay 6 and the contactor 7 are energized, and the normally open contacts are closed, thus conducting the flooded factory lighting circuit. When the signal is lost and the dry contact switch 5 is forced to open, because the normally open contacts are already engaged, the continuous current will continue to supply power to the coil of the contactor 7, and the coil will keep the normally open contacts engaged, thus forming a self-locking mechanism for the entire circuit, ensuring the continuous conduction of the flooded factory lighting circuit.

[0047] Due to the numerous functional areas within the underground powerhouse, such as the main plant, auxiliary plant, and main transformer tunnel, as well as the multiple evacuation routes, and considering the short distance of the extra-low voltage 24V DC power supply, multiple flood-prone plant lighting circuits were installed to prevent excessive voltage drop from causing the lights to malfunction. These circuits included those upstream of the main plant, downstream of the main plant, and between the main and auxiliary plant buildings. Verification confirmed that the longest lighting circuit is the upstream circuit of the main plant, measuring 90 meters in length and supporting 16 underwater lights (3W each). Based on the voltage drop calculation formula... Meets the operating requirements of the lighting fixtures.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lighting system for use in a pumped-storage power station when the powerhouse is flooded, characterized in that, Includes a water level monitoring gauge (1), a flooded plant control terminal (2), signal cables (3), a flooded plant lighting box (4), a voltage conversion device (10), and flooded plant lighting fixtures (11); The monitoring water level gauge (1) is used to monitor the water level changes at the bottom of the underground plant and upload the water level data to the flooded plant control terminal (2). The flooded plant control terminal (2) is used to receive water level signals from each monitoring water level gauge (1) and send out dry contact signals; The signal cable (3) is used to transmit the dry contact signal of the flooded factory building; The flooded factory lighting box (4) is used to supply power to the flooded factory lighting fixtures (11). The incoming power supply is drawn from the emergency lighting system and the ground switch station common power system, and is equipped with a dual power supply switching device (12). The voltage conversion device (10) is used to convert AC 220V voltage into DC 24V safety extra-low voltage, and then supply the flooded factory lighting fixtures (11) after voltage conversion. The flooded factory lighting fixture (11) is used for evacuation lighting at the main escape routes when the factory is flooded.

2. The lighting system for pumped storage power plant when flooding the plant according to claim 1, characterized in that, The flooded factory lighting box (4) is equipped with a dry contact switch (5), a relay (6), a contactor (7), a circuit breaker (8), and a circuit power supply (9). The dry contact switch (5) is used to receive the dry contact signal sent by the flooded factory control terminal (2). The relay (6) is connected to the lower port of the circuit breaker (8) to control the opening and closing of the output circuit. The normally open contact of the contactor (7) is connected in parallel to both sides of the dry contact switch (5) to form a self-locking circuit. The circuit breaker (8) is in a continuously conducting state. The circuit power supply (9) provides power to the relay (6) and the contactor (7) and is in a continuously conducting state. When the water level monitoring gauge (1) does not collect the abnormal water level signal and the flooded factory control terminal (2) does not output a dry contact signal, the dry contact switch (5) is open, the circuit in the flooded factory lighting box (4) is not connected, and the flooded factory lamp (11) is not lit.

3. The lighting system for pumped storage power plant when flooding the plant according to claim 2, characterized in that, When the water level monitoring gauge (1) collects abnormal water level signals and uploads them to the flooded factory control terminal (2), the flooded factory control terminal (2) inputs the dry contact signal to the dry contact switch (5) of the flooded factory lighting box (4). When the dry contact switch is closed, the circuit inside the flooded factory lighting box (4) is connected, and the flooded factory lamp (11) is lit.

4. The lighting system for pumped storage power plant when flooding the powerhouse according to claim 1, characterized in that, The monitoring water level gauge (1) is installed at the bottom of the underground powerhouse of the pumped storage power station.

5. The lighting system for pumped storage power plant when flooding the powerhouse according to claim 1, characterized in that, The flooded factory building lighting box (4) is installed in the emergency refuge tunnel on the top of the underground factory building.

6. The lighting system for pumped storage power plant when flooding the plant according to any one of claims 2 to 5, characterized in that, The flooded factory lighting box (4) contains multiple sets of relays (6) and circuit breakers (8) connected in parallel.

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