CN210491274U - Direct current concentrates power supply tunnel lighting system - Google Patents

Abstract

The application discloses direct current concentrates power supply tunnel lighting system, concentrate power supply and LED lamps and lanterns including the direct current, the inside AC/DC conversion equipment that is provided with of direct current concentrates power supply, this AC/DC conversion equipment is used for concentrating the alternating current of power supply with the input direct current and converting into the direct current, LED lamps and lanterns electricity is connected in the output of direct current concentrates power supply, be provided with DC/DC conversion equipment in LED lamps and lanterns, this DC/DC conversion equipment is used for concentrating the direct current that power supply provided with the direct current and converting into the luminous direct current of drive illumination LED. The application provides a direct current centralized power supply tunnel lighting system arranges the AC/DC module outside the LED lamps and lanterns, has greatly improved the life of power, has reduced the maintenance cost, has improved the fail safe nature of system.

Description

Direct current concentrates power supply tunnel lighting system

Technical Field

The application relates to the field of tunnel lighting, in particular to a direct-current power supply LED tunnel lighting system.

Background

At present, the traditional alternating current power distribution mode is still adopted in the power distribution link in tunnel lighting, namely: each LED lamp is provided with an AC/DC power supply module for driving the LED light source. The power distribution mode has two defects, namely the service life of the AC/DC power supply module cannot keep up with that of the LED light source, the power supply is generally replaced for two to three times in the service life cycle of the LED light source, particularly, lamps of a tunnel lighting part need to be normally on for 24 hours, and the service life of the power supply is generally reached in 3 to 5 years; secondly, the loss of the distribution line is very large. Therefore, a safer and more reliable power supply method is needed to be designed for prolonging the service life of the power supply of the lighting fixture and reducing the line loss.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the life of tunnel lighting lamps and lanterns power among the prior art is short, the circuit loss is big, and the reliability is not high, the utility model provides a tunnel lighting system of direct current centralized power supply for the life of extension illumination lamps and lanterns power reduces the circuit loss.

The utility model provides a direct current concentrates power supply tunnel lighting system, including direct current concentrates power supply, direct current concentrates power supply and includes AC/DC conversion equipment, this AC/DC conversion equipment is used for converting the alternating current of inputing direct current concentrates power supply into the direct current; the LED lamp is electrically connected with the output end of the direct current centralized power supply, a DC/DC conversion device is arranged in the LED lamp, and the DC/DC conversion device converts direct current provided by the direct current centralized power supply into direct current for driving the lighting LED to emit light.

The utility model provides an among the above-mentioned technical scheme, fall into two parts with the AC/DC power of traditional LED lamps and lanterns: the LED lamp comprises an AC/DC part and a DC/DC part, wherein the AC/DC part is concentrated into a direct current concentrated power supply, and the DC/DC part is reserved in the LED lamp. The mode not only improves the efficiency of the lamp driving power supply, but also greatly prolongs the service life of the power supply and reduces the maintenance cost; meanwhile, the power factor is improved, the current harmonic wave is reduced, and the operation cost of the alternating current power grid is reduced.

Optionally, the 10kV high-voltage power is transformed into 380V alternating current through a working transformer, the 380V alternating current is transmitted to at least one DC centralized power supply through a bus, and an AC/DC conversion device in the DC centralized power supply converts the 380V alternating current into direct current to provide direct current for the enhanced lighting loop and the basic lighting loop in the tunnel.

Optionally, the lighting system comprises an emergency device powered by a diesel generator set, and the emergency device is used for temporarily supplying power in the case of power failure or equipment failure of a power supply line.

Optionally, the lighting system includes an EPS power supply, when neither the mains supply nor the diesel generator set can supply power, the EPS starts to work, the EPS supplies power to the emergency direct-current power supply, and the emergency direct-current power supply is used for driving the LED in the emergency lighting loop to emit light, so as to ensure that the emergency lighting loop lamp can be continuously lighted.

Optionally, the dc centralized power supply includes an ac lightning arrester, an ac contactor, and a dc power distribution cabinet, where the ac lightning arrester is used for lightning protection and grounding, and the ac contactor is used for controlling the start and the stop of the dc centralized power supply.

Optionally, the AC/DC conversion device is a multi-pulse voltage transformation rectifying module for converting alternating current into direct current with different voltage amplitudes.

Optionally, the DC voltage output by the DC centralized power supply is more than 400V, and an allowable input voltage of the DC/DC conversion device at the LED lamp end matches the output voltage of the DC centralized power supply. The calculated direct current bus voltage can obviously save the cable consumption only when exceeding 380V.

Optionally, the allowable input voltage range of the DC/DC conversion device at the LED lamp end is DC 320V-480V.

Optionally, the two dc centralized power supplies are respectively located at two ends of the tunnel, one of the two dc centralized power supplies power to half of the LED lamps in the left hole of the tunnel and half of the LED lamps in the right hole of the tunnel, and the other one of the two dc centralized power supplies power to the remaining half of the LED lamps in the left hole of the tunnel and the remaining half of the LED lamps in the right hole of the tunnel. The advantage of this scheme is that when one of the centralized power supply fails, the illumination LEDs in the tunnel are not all extinguished.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a circuit diagram of a dc centralized power supply tunnel lighting system in an embodiment of the present invention;

fig. 2 is a schematic structural view of an LED lamp according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a tunnel lighting system in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, technical solutions between the various embodiments of the present application may be combined with each other, but it must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not within the protection scope of the present application.

Fig. 1 is a circuit diagram of a tunnel lighting system with centralized DC power supply in an embodiment of the present invention, please refer to fig. 1, in which a high voltage is transformed into an AC of 380V by a transformer of a substation, the AC is transmitted to a centralized DC power supply 1 through a bus, a centralized DC power supply 2 is provided, a centralized DC power supply 3 (the number of the centralized DC power supplies is not limited to 3), an AC/DC conversion device is provided inside each centralized DC power supply to convert the AC transmitted by the bus into a DC having a certain voltage amplitude, the DC converted and outputted from the centralized DC power supply can supply power to a plurality of LED lamps in a basic lighting loop and an enhanced lighting loop of the tunnel, please refer to fig. 2, each LED lamp is integrated with a DC/DC conversion device to convert the DC provided by the centralized DC power supply into a DC having a voltage amplitude required by the LED lamps, used for driving the LED to emit light. In addition, an emergency power supply device which is powered by the diesel generating set is further arranged in the embodiment, and when the power supply system is in failure or is temporarily cut off, the emergency power supply device is started, so that the LED illuminating lamp which can work in the tunnel is always ensured. When the mains supply is powered off, the diesel generator is immediately started to generate AC380V to supply power to the DC centralized power supply at the rear end, and the DC centralized power supply converts the AC generated by the diesel generator into DC to continuously supply power to the rear-end lamp. The system is also provided with an EPS power supply, when the commercial power and the diesel generator are not powered, the EPS starts to work, and the EPS supplies power for the emergency direct-current power supply, so that the emergency lighting loop lamp can be continuously lightened.

Fig. 3 is a schematic diagram of a dc centralized power supply tunnel lighting system in an embodiment of the present invention, please refer to fig. 3, a dc centralized power supply is respectively disposed at two ends of the tunnel, one of the dc centralized power supplies power to half of the LED lamps in the left tunnel and half of the LED lamps in the right tunnel, and the other dc centralized power supply supplies power to the remaining half of the LED lamps in the left tunnel and the remaining half of the LED lamps in the right tunnel. The tunnel both ends set up concentrated power supply, and every concentrated power supply supplies tunnel left side hole half, and tunnel right side hole half, and the advantage of this scheme lies in, when one of them concentrated power supply trouble, the illumination LED can not all extinguish in the tunnel.

In summary, the conventional LED lamp is internally provided with an AC/DC power module, which has low efficiency, large heat generation and short service life, and after DC power supply is adopted, the lamp only needs a DC/DC driving module, so that the efficiency is extremely high and can reach 98%, the service life is long, and the heat generation is less. Of course, the utility model discloses a LED lamps and lanterns direct current centralized power supply system not only can use the tunnel illumination, can also be used to the place that needs a large amount of LED lamps and lanterns such as road, mill, view brightening.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.

Claims (9)

1. A dc centralized power supply tunnel lighting system, the system comprising:

the direct current centralized power supply comprises an AC/DC conversion device, wherein the AC/DC conversion device is used for converting alternating current input into the direct current centralized power supply;

the LED lamp is electrically connected with the output end of the direct current centralized power supply, a DC/DC conversion device is arranged in the LED lamp and is used for converting direct current provided by the direct current centralized power supply into direct current for driving the lighting LED to emit light.

2. The lighting system of claim 1, wherein 10kV high voltage power is transformed into 380V AC power through a working transformer, the 380V AC power is transmitted to at least one DC centralized power supply through a bus, and the AC/DC conversion device in the DC centralized power supply converts the 380V AC power into DC power to provide DC power for the enhanced lighting loop and the basic lighting loop in the tunnel.

3. The lighting system of claim 1, wherein the lighting system comprises an emergency device powered by a diesel generator set, the emergency device being configured to temporarily supply power in the event of a mains power outage or an equipment failure in the power supply line.

4. The lighting system of claim 3, wherein the lighting system comprises an EPS power supply, and when neither mains power nor the diesel generator set is available, the EPS is operated, and the EPS supplies power to an emergency DC power supply, and the emergency DC power supply is used for driving the LEDs in the emergency lighting loop to emit light, so that the lamps in the emergency lighting loop can be continuously lighted.

5. The lighting system according to claim 1, wherein the dc centralized power supply comprises an ac lightning arrester, an ac contactor, and a dc power distribution cabinet, wherein the ac lightning arrester is used for lightning protection to ground, and the ac contactor is used for controlling on and off of the dc centralized power supply.

6. The lighting system of claim 1 wherein the AC/DC conversion means is a multi-pulse transformer rectifier module for converting alternating current to direct current of different voltage amplitudes.

7. The lighting system according to claim 1, wherein the DC voltage output by the DC centralized power supply is more than 400V, and an allowable input voltage of the DC/DC conversion device at the LED lamp end matches the output voltage of the DC centralized power supply.

8. The lighting system of claim 6, wherein the allowable input voltage range of the DC/DC conversion device at the LED lamp end is DC 320V-480V.

9. The lighting system as claimed in any one of claims 1 to 7, wherein two DC centralized power supplies are provided, and are respectively provided at two ends of the tunnel, wherein one DC centralized power supply supplies power to half of the LED lamps in the left hole of the tunnel and half of the LED lamps in the right hole of the tunnel, and the other DC centralized power supply supplies power to the remaining half of the LED lamps in the left hole of the tunnel and the remaining half of the LED lamps in the right hole of the tunnel.

Images