CN210042323U - Emergency lighting system for hydropower station - Google Patents

Abstract

The utility model discloses a hydropower station emergency lighting system, which comprises a lighting system power supply and a running light transformer which are arranged at the height position above a generator layer, and a plurality of emergency lighting lamps arranged at the height position below a water turbine layer; the lighting system power supply is electrically connected with the portable lighting transformer, and the emergency lighting lamp is electrically connected with the portable lighting transformer through a lighting line. By the structure, the power supply of the lighting system is arranged at the position of the generator layer and above the generator layer, so that the power is cut off immediately at the early stage of water flooding prevention, and the reliability of power supply is ensured; a traveling light transformer special for an underwater emergency lighting system is arranged at a position at or above the generator layer elevation, 220V alternating current is converted into safe voltage DC12V, power is supplied to an underwater emergency lighting loop, and the safety of power supply is guaranteed.

Description

Emergency lighting system for hydropower station

Technical Field

The utility model relates to a water and electricity engineering, concretely relates to power station emergency lighting system.

Background

Because of the particularity of the pumped storage power station, an underground plant is usually adopted, the holes are numerous and comprise a main plant, a main transformer hole, a tail gate hole, a bus bar hole and the like, and due to the limitation of the space of the underground hole group, and the water head of most of the pumped storage power stations in China is 500-600 m at present, once a plant accident of flooding occurs, a large amount of water can fill the plant in a short time, so that the machine set jumps, the power failure of the whole plant, the equipment damage, even the damage of hydraulic buildings and the casualties can be caused.

The main power house of the hydropower station is often divided into a plurality of layers, and generally comprises a tail water pipe layer, a volute layer, a water turbine layer, a generator layer, a crane layer and the like from bottom to top. Wherein the generator layer is hereinafter referred to as substructure and the generator layer is above referred to as superstructure.

In the past, power supply, lamp and lighting circuit laying and the like of a general lighting system cannot be suitable for the condition of power station flooding, once a factory accident happens, the lighting system loses effect, a camera cannot record the condition of the accident due to insufficient illumination, and power station operators cannot provide an effective solution according to the specific condition of a flooding part, so that the accident is further expanded. Therefore, a set of lighting system aiming at the condition of flooding the plant needs to be designed to provide safety guarantee for power station operators.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a hydropower station emergency lighting system of high reliability and high security.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a hydropower station emergency lighting system comprises a lighting system power supply and a running light transformer which are arranged at an elevation position above a generator layer, and a plurality of emergency lighting lamps arranged at an elevation position below a water turbine layer; the lighting system power supply is electrically connected with the portable lighting transformer, and the emergency lighting lamp is electrically connected with the portable lighting transformer through a lighting line.

Practice shows that the following main reasons why a general emergency lighting system cannot work under the flooding condition are as follows: 1) the power supply of the lighting system can not be ensured, and the emergency lighting distribution boxes are arranged layer by layer and are easy to be powered off due to flooding; 2) lamps and circuits have low protection level, cannot work underwater, and have the condition of electric leakage; 3) the power supply voltage is 220V, is not safe voltage, has the potential safety hazard.

By the structure, the power supply of the lighting system is arranged at the position of the generator layer and above the generator layer, so that the power is cut off immediately at the early stage of water flooding prevention, and the reliability of power supply is ensured; a traveling light transformer special for an underwater emergency lighting system is arranged at the position at or above the generator layer elevation, alternating current 220V is converted into safe voltage DC12V, power is supplied to an underwater emergency lighting loop, and the safety of power supply is guaranteed.

As a further improvement of the above technical solution:

the lighting system power supply comprises an emergency lighting distribution box or an EPS emergency power supply.

The row lamp transformer is used to convert the 220V voltage to DC12V voltage.

The feeder switch of the lighting system power supply is provided with an electric leakage protection device so as to avoid the situation of electric leakage caused by flooding.

The lighting line adopts waterproof cable, and newly-built power station can adopt the mode of wearing the metal pipe to apply in the dark, reforms transform the mode that the power station can adopt to wear the metal pipe to apply obviously.

The protection grade of the junction box between the lines of the lighting circuit is IP 68.

The protection grade of the emergency lighting fixture is IP 68.

The lamp and the junction box with the protection grade of IP68 are selected, so that the underwater LED lamp can adapt to underwater long-time work, and the reliability of power supply is further ensured.

Compared with the prior art, the utility model has the advantages of:

1) the power supply of the underwater lighting system can be an emergency lighting distribution box or an EPS device, and the emergency lighting distribution box or the EPS device is arranged at a position above a generator layer so as to cut off power immediately at the initial stage of water flooding prevention and ensure the reliability of power supply.

2) The lamps and the junction box adopt the selected protection grade of IP68, and can work underwater for a long time. The lighting line adopts waterproof cable, and newly-built power station can adopt the mode of wearing the metal pipe to apply in the dark, reforms transform the mode that the power station can adopt to wear the metal pipe to apply obviously. In order to ensure the safety of a common emergency lighting system, the feeder switches of the lighting distribution boxes are all provided with leakage protection switches so as to avoid the situation of leakage caused by flooding.

3) A special traveling light transformer for an underwater emergency lighting system is arranged, alternating current 220V is converted into safe voltage DC12V, and power is supplied to an underwater emergency lighting loop. The row lamp transformers are arranged at a position at or above the generator level.

Drawings

Fig. 1 is the embodiment of the present invention, in which a power generator layer is provided with a power supply and a running light transformer.

Fig. 2 is the utility model discloses embodiment in the embodiment underwater emergency lighting arrangement diagram of spiral case layer.

Fig. 3 is the utility model discloses in the embodiment underwater emergency lighting arrangement diagram of hydraulic turbine layer.

Fig. 4 is a wiring diagram of the lighting distribution box.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example 1:

the invention is further explained by combining the transformation scheme of a certain pumped storage power station in Henan after water flooding:

the hydropower station emergency lighting system comprises a lighting system power supply 1, a row lamp transformer 2 and a plurality of emergency lighting lamps 3, wherein the lighting system power supply 1 is electrically connected with the row lamp transformer 2, and the emergency lighting lamps 3 are electrically connected with the row lamp transformer 2 through lighting lines 4.

As shown in figure 1, the lighting system power supply 1 adopts an emergency lighting distribution box MLE02 and is arranged in a station power distribution room with the same height as a generator to prevent a power supply from being flooded, and a feeder switch of the emergency lighting distribution box is provided with a leakage protection switch. The special row lamp transformer for the underwater emergency lighting system is arranged beside an emergency lighting distribution box and is used for converting 220V voltage into DC12V voltage. As shown in fig. 2 and 3, transformer circuits at 448.7m height are led to the floors of the turbine, etc. by means of lighting lines 4, with openings made in the floor of the volute, turbine, etc. For example, the U1 loop of the volute layer underwater emergency lighting running light transformer 2, and the U2 and U3 loops of the hydraulic turbine layer running light transformer 2. The protection grade of the emergency lighting lamp 3 is IP68, and the plurality of underwater emergency lighting lamps 3 are respectively arranged on the water turbine layer and below the main escape passage, the water turbine chamber and the position with the camera. The wiring diagram of the MLE02 emergency lighting distribution box and the distribution diagram of the emergency lighting fixture 3 are shown in fig. 4.

Considering that the project is a reconstruction project, the underwater lighting circuit 4 adopts a mode of penetrating galvanized steel pipes for exposed coating, and detailed design drawings refer to fig. 2 and 3.

The operation mode is as follows: the general lighting system provides lighting under general conditions, when a plant is flooded with water, the circuit breaker with the leakage protection function trips and the lighting stops working after a lamp or a junction box of the general lighting system encounters water, and equipment of the underwater emergency lighting system can still continue working when encountering water by adopting the protection grade of IP68, so that the requirements of illumination and the like of the camera under the conditions of escape and flooding are met.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims (6)

1. The hydropower station emergency lighting system is characterized by comprising a lighting system power supply (1) and a running light transformer (2) which are arranged at an elevation position above a generator layer, and a plurality of emergency lighting lamps (3) which are arranged at an elevation position below a water turbine layer; the lighting system power supply (1) is electrically connected with the row lamp transformer (2), and the emergency lighting lamp (3) is electrically connected with the row lamp transformer (2) through a lighting line (4).

2. The hydropower station emergency lighting system according to claim 1, wherein the lighting system power supply (1) comprises an emergency lighting distribution box or an EPS emergency power supply.

3. The hydroelectric power station emergency lighting system of claim 1, wherein the row light transformer (2) is configured to convert a 220V voltage to a DC12V voltage.

4. Hydropower station emergency lighting system according to claim 1, characterized in that a feeder switch of the lighting system power supply (1) is provided with an earth leakage protection device.

5. Hydropower station emergency lighting system according to claim 1, characterized in that the lighting line (4) is a waterproof cable.

6. The hydropower station emergency lighting system according to claim 1, characterized in that the emergency lighting fixture (3) has a protection rating of IP 68.

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