CN210629923U

CN210629923U - Direct current power supply distribution structure

Info

Publication number: CN210629923U
Application number: CN201920857321.1U
Authority: CN
Inventors: 马化盛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-05-26
Anticipated expiration: 2029-06-10

Abstract

The utility model relates to a power supply distribution technical field, concretely relates to DC power supply distribution structure. The method comprises the following steps: the control terminal comprises a direct current positive line, a direct current neutral line and a direct current negative line, the direct current electric appliance is connected between the direct current positive line and the direct current neutral line, between the direct current negative line and the direct current neutral line and between the direct current positive line and the direct current negative line, the direct current positive line, the direct current negative line and the direct current neutral line are connected to the direct current cabinet, and the control terminal is in signal connection with the direct current cabinet. The utility model adopts two-pole three-wire system DC bus, the load is symmetrically arranged, the voltage drop of the DC center line can reach zero at the lowest, the transmission distance is equivalent to a single-pole voltage doubling two-wire system, and the utility model has strong engineering adaptability, namely, the power supply voltage of the electric appliance is lower, and the power consumption is safer; the positive and negative electrodes of the direct-current electric appliances are arranged in a staggered manner, mutual backup of double buses is realized, and the serious consequence that the lamp is turned off in the whole road section possibly caused by the fault of one single bus in the conventional single bus scheme is avoided.

Description

Direct current power supply distribution structure

Technical Field

The utility model relates to a power supply distribution technical field, concretely relates to DC power supply distribution structure.

Background

The first generation of direct current centralized power supply technology of the common street lamp is to output single-pole direct current (about 200-300V) which is isolated from commercial power and the ground and is controllable after alternating commercial power is rectified in a centralized way by a rectifier, and supply the single-pole direct current to a direct current load, which is a basic direct current centralized power supply circuit; when a single-pole line has a serious fault, such as short circuit of the line, power supply damage and the like, the whole line is easy to stop working, all loads of the line stop working, and the operation cannot be allowed in public lighting scenes such as roads, subway stations and the like; because of sharing the line, the load can not be controlled at intervals, such as odd-even interval switching lamps; because the circuit is shared, the brightness and the color temperature can not be adjusted simultaneously by adjusting the direct-current voltage; the 200-300V direct current does not belong to the range of safe voltage, and the safety needs to be improved. In order to overcome the defects of safety, stability, intelligence, economy and the like in the first generation of direct current centralized power supply and distribution mode LED lighting engineering, the industry needs to provide a second generation of direct current centralized power supply system technology to achieve the obvious effects of being safer, more stable, more intelligent and more economical.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's not enough and defect, providing a safer, more stable, more intelligent, more economic, interval regulation and control and can adjust the new generation DC power supply distribution structure of colour temperature.

The purpose of the utility model is realized through the following technical scheme:

a dc-powered power distribution structure comprising: the control terminal comprises a direct current positive line, a direct current neutral line and a direct current negative line, the direct current electric appliance is connected between the direct current positive line and the direct current neutral line and between the direct current negative line and the direct current neutral line, the direct current positive line, the direct current negative line and the direct current neutral line are connected to the direct current cabinet, the direct current cabinet is electrically connected with a mains supply, and the control terminal is in signal connection with the direct current cabinet.

Specifically, the direct-current electric appliances connected to the direct-current positive line and the direct-current electric appliances connected to the direct-current negative line are arranged at intervals and are equal in number.

Specifically, the dc cabinet includes: the alternating current power distribution module comprises an alternating current power distribution module, an alternating current lightning protection module, a rectifier module group, a first direct current power distribution module and a first direct current lightning protection module, wherein the direct current positive line comprises a first direct current positive line, the direct current negative line comprises a first direct current negative line, the direct current central line comprises a first direct current central line, the rectifier module group comprises a first rectifier module group, the first rectifier module group comprises a first positive rectifier module group and a first negative rectifier module group, the first positive rectifier module group and the first negative rectifier module group are arranged in parallel, the input end of the alternating current power distribution module is electrically connected with commercial power, the output end of the alternating current power distribution module is electrically connected with the input end of the alternating current lightning protection module, the alternating current lightning protection module is electrically connected with the input end of the first rectifier module group, and the output end of the first positive rectifier module group is electrically connected with the positive input end of the first direct current power distribution, the output end of the first negative pole rectification module group is electrically connected with the negative pole input end of the first direct current distribution module, the positive pole output end of the first direct current distribution module is electrically connected with the positive pole input end of the first direct current lightning protection module, the negative pole output end of the first direct current distribution module is electrically connected with the negative pole input end of the first direct current lightning protection module, and the first direct current lightning protection module outputs a first direct current positive line and a first direct current negative line.

Specifically, when the first positive pole rectifying module group includes more than two positive pole rectifying modules, more than two positive pole rectifying modules are arranged in parallel, and the first negative pole rectifying module group includes more than two negative pole rectifying modules, more than two negative pole rectifying modules are arranged in parallel.

Specifically, the dc positive line includes a second dc positive line, the dc negative line includes a second dc negative line, the dc neutral line includes a second dc neutral line, and the dc cabinet further includes: a second direct current distribution module and a second direct current lightning protection module, the rectifier module group also comprises a second rectifier module group, the second rectifying module group comprises a second anode rectifying module group and a second cathode rectifying module group, the second anode rectifying module group and the second cathode rectifying module group are arranged in parallel, the alternating current lightning protection module is also electrically connected with the input end of the second rectifying module group, the output end of the second anode rectifying module group is electrically connected with the anode input end of the second direct current distribution module, the output end of the second negative pole rectifying module group is electrically connected with the negative pole input end of the second direct current distribution module, the positive output end of the second direct current distribution module is electrically connected with the positive input end of the second direct current lightning protection module, the negative electrode output end of the second direct current distribution module is electrically connected with the negative electrode input end of the second direct current lightning protection module, the second direct current lightning protection module outputs the second direct current positive line and the second direct current negative line.

Specifically, when the second positive pole rectifying module group comprises more than two positive pole rectifying modules, more than two positive pole rectifying modules are arranged in parallel, the first negative pole rectifying module group and the second negative pole rectifying module group both comprise more than two negative pole rectifying modules, and more than two negative pole rectifying modules are arranged in parallel.

Specifically, still include in the direct current cabinet: the direct current power distribution system comprises a DCU main control unit, an alternating current side detection module, a direct current side insulation detection module and a DTU communication module, wherein the DCU main control unit is respectively electrically connected with a positive pole rectification module group, a negative pole rectification module group, the alternating current side detection module, the direct current side insulation detection module and the DTU communication module, the alternating current side detection module is respectively electrically connected with an alternating current power distribution module and an alternating current lightning protection module, the direct current side detection module is respectively electrically connected with a first direct current power distribution module, a second direct current power distribution module, a first direct current lightning protection module and a second direct current lightning protection module, and the direct current insulation detection module is electrically connected with the direct current side detection module.

Specifically, the direct-current electric appliance comprises a direct-current lamp, the direct-current lamp contains a direct-current driver and a light source module, the direct-current lamp comprises a yellow lamp bead and a white lamp bead, the yellow lamp bead is connected between a first direct-current positive line and a first direct-current central line, and the white lamp bead is connected between a first direct-current negative line and the first direct-current central line.

Specifically, the direct current electric appliance further comprises an advertising lamp box, and the advertising lamp box is connected between the second direct current positive line and the second direct current central line and between the second direct current negative line and the second direct current central line.

Specifically, the DCU main control unit is further electrically connected with the multifunctional expansion module and the electrical appliance communication module respectively.

Compared with the prior art, the utility model following advantage and beneficial effect are included:

(1) the utility model discloses an adopt two poles of the earth three-wire system direct current generating line, the symmetrical arrangement load, direct current central line pressure drop can reach zero minimum, transmission distance is equivalent with monopole double voltage two wire system, extremely strong engineering adaptability has, direct current is with the crisscross overall arrangement of electrical apparatus positive negative pole, it can realize that direct current lamps and lanterns interval bright lamp and direct current lamps and lanterns are bright two kinds of modes entirely each other to realize double bus, it probably leads to the serious consequence that the whole way section goes out of the light to avoid current single bus scheme single bus trouble, effectively promote lighting system's reliability, and be favorable to the maintenance in later stage.

(2) The utility model can supply power to different voltage devices, control in stages and illuminate according to requirements by adding the rectifier module group; the voltage output by the direct current positive line and the direct current negative line is only half of the alternating current input voltage, so that the power utilization risk is effectively reduced, in addition, the direct current output of the rectifier module is electrically isolated from the input commercial power and the ground, and the direct current distribution part does not have potential difference to the ground, so that the safety level of a direct current system is further improved.

(3) Connect between first direct current positive line and first direct current central line through yellow lamp pearl, white lamp pearl is connected with between first direct current negative line and the first direct current central line, need not to lay the circuit of adjusting luminance, only needs the output voltage of control rectifier module group, adopts direct current bus voltage to adjust luminance, can realize stepless dimming function, reaches effect such as meticulous light modulation or regulation colour temperature as required, improves system intelligence, economic nature and system design flexibility.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a relationship diagram of the modules inside the dc cabinet of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

The utility model discloses a concrete implementation process as follows:

as shown in fig. 1 to 2, a dc power distribution structure includes: the control terminal, the direct current cabinet 2, the bipolar direct current bus and the direct current electric appliance, wherein the bipolar direct current bus comprises a direct current positive line, a direct current neutral line and a direct current negative line, the direct current electric appliance is connected between the direct current positive line and the direct current neutral line and between the direct current negative line and the direct current neutral line, the direct current positive line, the direct current negative line and the direct current neutral line are connected to the direct current cabinet 2, the direct current cabinet 2 is electrically connected with a mains supply, and the control terminal is in signal connection with the direct current cabinet 2. According to actual need, direct current can also set up between direct current positive line and direct current negative line with electrical apparatus, sets up and can satisfy some with electrical apparatus to the demand of high-voltage connection between direct current positive line and direct current negative line, need not additionally to insert the high-voltage line.

The direct current positive line and the direct current neutral line, and the direct current neutral line and the direct current negative line form two-pole direct current buses on the circuit, which are called as double buses for short, the direct current neutral line has small voltage drop and can even be reduced to zero, the direct current positive line, the direct current neutral line and the direct current negative line form two-pole three-wire system bipolar direct current buses, when the direct current circuit of any pole breaks down, the other pole can be normally used, so that the mutual backup function of the double buses is realized, the direct current electric appliances adopt a staggered arrangement design, the risk of system paralysis caused by single-point serious faults can be avoided, and the reliability of the lighting system is effectively improved. Because the line structure is a two-pole three-wire system, and the voltage of each pole is u, the two poles are symmetrically arranged with loads, and the loading capacity of the load is equivalent to that of a single pole 2 u. Direct current 120V is safe voltage according to IEC regulation, and the utility model discloses a direct current positive line is to direct current central line, direct current central line is all less than 120V to the busbar voltage of direct current negative line all the time, make on the whole direct current power supply distribution network with the supply voltage of electrical apparatus be in safe low pressure within range all the time, effectively reduce the power consumption risk, and adopt low pressure direct current power supply, direct current drive's on the lamps and lanterns operating voltage stress also is showing and is reducing, the lamps and lanterns reliability is showing and is promoting, fortune dimension cost further reduces, 2 low power consumptions of direct current cabinet, the temperature rise is little, power factor is higher than with grade alternating current cabinet drive, the cost is cheaper. The double-bus mutual backup can realize two modes of interval lighting of the direct-current lamp and full lighting of the direct-current lamp, can select to open a general lamp to light or light all lamps, can also overhaul the other half under the condition that half lamps are lighted when overhauling, and avoids the serious consequence that the fault of one single bus of the existing single-bus scheme needs power failure maintenance and possibly leads to the lamp failure of the whole road section.

Specifically, the direct-current electric appliances connected to the direct-current positive line and the direct-current electric appliances connected to the direct-current negative line are arranged at intervals and are equal in number. Make direct current electrical apparatus's load divide odd-even as far as possible symmetric distribution in two poles of the earth circuit, the central line electric current offsets each other, the load symmetry degree is higher, the central line electric current is less, the central line pressure drop is also less, can reach zero at minimum for the low pressure power supply load capacity doubles, it is equivalent with double voltage monopole circuit, this means under the same load capacity condition, two poles of the earth three-wire system is half less than the operating voltage of monopole two-wire system, consequently, the direct current generating line of first generation direct current centralized power supply adopts monopole two-wire system 220V, the utility model discloses (second generation direct current centralized power supply) adopts two poles of the earth three-wire system 110V, and the power supply capacity is equivalent, but the latter has more practical meanings, and is safer, more stable, more. Specifically, the dc cabinet 2 includes: the alternating current power distribution module comprises an alternating current power distribution module, an alternating current lightning protection module, a rectifier module group, a first direct current power distribution module and a first direct current lightning protection module, wherein the direct current positive line comprises a first direct current positive line 21, the direct current negative line comprises a first direct current negative line 22, the direct current central line comprises a first direct current central line 23, the rectifier module group comprises a first rectifier module group 32, the first rectifier module group 32 comprises a first positive rectifier module group 31 and a first negative rectifier module group 33, the first positive rectifier module group 31 and the first negative rectifier module group 33 are arranged in parallel, the alternating current power distribution module input end is electrically connected with commercial power, the alternating current power distribution module output end is electrically connected with the alternating current lightning protection module input end, the alternating current lightning protection module is electrically connected with the input end of the first rectifier module group 32, the first positive rectifier module group 31 output end is electrically connected with the first direct current power distribution module positive input end, the output end of the first negative pole rectification module group 33 is electrically connected with the negative pole input end of the first dc distribution module, the positive pole output end of the first dc distribution module is electrically connected with the positive pole input end of the first dc lightning protection module, the negative pole output end of the first dc distribution module is electrically connected with the negative pole input end of the first dc lightning protection module, and the first dc lightning protection module outputs a first dc positive line 21 and a first dc negative line 22. The core device of the direct current cabinet 2 is a rectifier module group, which converts the input commercial power into safe and controllable direct current and then is connected to a direct current power supply and distribution line through a direct current distribution module, the alternating current distribution module comprises an alternating current distribution switch and an alternating current distribution breaker, and the alternating current distribution module is used for carrying out alternating current side isolation and remote switch control; the alternating current lightning protection module is mainly used for filtering surge and lightning stroke signals from a power grid and protecting a rear-stage electrical module; the rectifying module group is used for converting alternating current into controllable direct current and isolating commercial power from the ground, the rectifying module group comprises a first positive rectifying module group 31 and a first negative rectifying module group 33, the first positive rectifying module group 31 outputs a first direct current positive pole, the first negative rectifying module group 33 outputs a first direct current negative pole, and a first direct current positive line 21, a first direct current negative line 22 and a first direct current central line 23 form a 'bipolar three-line system'; the first direct current distribution module comprises a first direct current distribution switch and a first direct current distribution circuit breaker, branch circuit control and switch isolation are achieved, and the first direct current lightning protection module is used for filtering surge and lightning stroke signals conducted back by a later-stage distribution circuit and protecting electronic components in the direct current cabinet 2. The first direct current center line is electrically connected with the negative electrode of the first positive electrode rectification module group, and the first direct current center line is also electrically connected with the positive electrode of the first negative electrode rectification module group.

Specifically, when the first positive electrode rectification module group 31 includes more than two positive electrode rectification modules, the more than two positive electrode rectification modules are arranged in parallel, and the first negative electrode rectification module group 33 includes more than two negative electrode rectification modules, the more than two negative electrode rectification modules are arranged in parallel. The parallel connection number of the rectifier modules is determined by the total load capacity of the pole line, the parallel connection redundancy requirement of the line and the output power of a single rectifier module. The more than two rectifier modules are connected in parallel, so that capacity expansion and redundant backup of power can be realized, one group of parallel rectifier modules output one-pole direct-current bus, the output of the rectifier modules is controllable, the voltage range can be adjusted, and the whole structure is more energy-saving; the two groups of rectifier module groups can form a bipolar direct current bus, loads on the bipolar direct current bus are arranged in a staggered mode, the double-bus backup function can be achieved, and the reliability of the lighting system is improved.

Specifically, the positive dc line includes a second positive dc line 24, the negative dc line includes a second negative dc line 25, the neutral dc line includes a second neutral dc line 26, and the dc cabinet 2 further includes: a second direct current distribution module and a second direct current lightning protection module, the rectifier module group also comprises a second rectifier module group, the second rectifying module group comprises a second anode rectifying module group and a second cathode rectifying module group, the second anode rectifying module group and the second cathode rectifying module group are arranged in parallel, the alternating current lightning protection module is also electrically connected with the input end of the second rectifying module group, the output end of the second anode rectifying module group is electrically connected with the anode input end of the second direct current distribution module, the output end of the second negative pole rectifying module group is electrically connected with the negative pole input end of the second direct current distribution module, the positive output end of the second direct current distribution module is electrically connected with the positive input end of the second direct current lightning protection module, the negative electrode output end of the second direct current distribution module is electrically connected with the negative electrode input end of the second direct current lightning protection module, the second dc lightning protection module outputs the second positive dc line 24 and the second negative dc line 25. By setting the direct current bus voltage among the second direct current positive line 24, the second direct current negative line 25 and the second direct current neutral line 26, power supply for different voltage equipment can be realized, and the positive pole and the negative pole are controlled in a grading way to distribute power as required; the second direct current power distribution module has the same function as the first direct current power distribution module, and the second direct current lightning protection module has the same function as the first direct current lightning protection module. The second direct current center line is electrically connected with the cathode of the second anode rectification module group, and the second direct current center line is also electrically connected with the anode of the second cathode rectification module group.

Specifically, when the second positive pole rectifying module group includes more than two positive pole rectifying modules, more than two positive pole rectifying modules are arranged in parallel, the first negative pole rectifying module group 33 and the second negative pole rectifying module group all include more than two negative pole rectifying modules, more than two negative pole rectifying modules are arranged in parallel. The plurality of rectifier modules are connected in parallel, so that capacity expansion and redundancy backup of power can be realized, a group of parallel rectifier modules output one-pole direct-current bus, the output of the rectifier modules is controllable, the voltage range can be adjusted, and the whole structure is more energy-saving.

Specifically, still include in the direct current cabinet 2: the direct current power distribution system comprises a DCU main control unit, an alternating current side detection module, a direct current side insulation detection module and a DTU communication module, wherein the DCU main control unit is electrically connected with a positive pole rectification module group, a negative pole rectification module group, the alternating current side detection module, the direct current side insulation detection module and the DTU communication module respectively, the alternating current side detection module is electrically connected with an alternating current power distribution module and an alternating current lightning protection module respectively, the direct current side detection module is electrically connected with a first direct current power distribution module, a second direct current power distribution module, a first direct current lightning protection module and a second direct current lightning protection module respectively, the direct current insulation detection module is electrically connected with the direct current side detection module, and the DCU main control unit is electrically connected with a touch control module. The alternating current side detection module is used for detecting running parameters such as alternating current voltage, alternating current and the like, reporting the monitored parameters to the DCU main control unit and completing monitoring and protection functions; the direct current side detection module is used for detecting running parameters such as direct current voltage, direct current and the like, reporting the monitored parameters to the DCU main control unit and completing monitoring and protection functions; the direct-current insulation detection module is used for monitoring the insulation condition of the direct-current distribution line, if insulation damage is found, an alarm signal is sent to the DCU main control unit, the DTU communication module is used for connecting a network, and the touch module is used for local display and operation.

Specifically, the dc electrical appliance includes a dc lamp 28, the dc lamp 28 includes a dc driver and a light source module, the dc lamp 28 includes a yellow lamp bead and a white lamp bead, the yellow lamp bead is connected between a first positive dc line 21 and a first central dc line 23, and the white lamp bead is connected between a first negative dc line 22 and the first central dc line 23. The yellow and white color temperature lamp beads are combined into a lamp, wherein the yellow lamp beads and the white lamp beads are respectively powered and controlled by a positive electrode and a negative electrode, when the voltages of the positive electrode and the negative electrode are different, the brightness of more than two color temperatures are different, the mixed color temperature and brightness can be simultaneously changed, different currents are adjusted by matching with a direct current driver to realize stepless dimming, the effects of fine dimming or color temperature adjustment according to needs and the like are achieved, and the intelligence, the economy and the system design flexibility of the system are improved; the direct current driver detects the voltage of the bipolar direct current bus, and drives the current to control the brightness of the lamp according to a set rule, so that the aim of dimming according to requirements is fulfilled, the construction investment is saved, and the effects of saving energy and prolonging the service life of the lamp are achieved; the experience of the user on the illumination color temperature can also be improved.

Specifically, the dc electrical appliance further comprises an advertising lamp box 29, and the advertising lamp box 29 is connected between the second dc positive line 24 and the second dc neutral line 26, and between the second dc negative line 25 and the second dc neutral line 26. The advertising lamp box 29 is usually installed in a low-altitude position, is close to people, and is powered by a 48V bipolar three-wire direct-current bus with lower voltage and higher safety, and by considering various factors such as power level, safety level, functional characteristics and reliability, the advertising lamp box 29 and other equipment with voltage different from that of the direct-current lamp 28 can be powered by a second rectification module group, a second direct-current positive wire 24, a second direct-current neutral wire 26 and a second direct-current negative wire 25, and because the power level, the working time, the power supply reliability requirement level, the returning unit and the like of different types of electromechanical equipment are different, a multi-pole direct-current power supply scheme can be adopted, the rectification module groups with different safety requirements can be additionally provided with safety equipment with different levels, and multiple factors such as cost and safety are flexibly selected; certainly, if the direct-current lamp 28 needs to be additionally installed, the advertising lamp box 29 can be replaced by the direct-current lamp 28, and only the working voltage of the direct-current lamp needs to be designed into corresponding voltage; hierarchical control, lighting on demand; of course, the third rectifier module group and the third dc positive line, and the second dc neutral line 26 and the second dc negative line 25 may be further added as needed to form a hexapole seven-wire system or a hexapole nine-wire system, and the connection mode corresponds to that of the second rectifier module group.

Specifically, the DCU main control unit is further electrically connected with the multifunctional expansion module and the electrical appliance communication module respectively. The multifunctional expansion module can be a flow module, a pressure module, a water level module, a gas module, a PM2.5 module, a positioning module and the like, and is combined with a cloud platform and a mobile network to realize the Internet of things; the electric appliance communication module can realize the electric appliance monitoring function through communication modes such as PLC, RS485, DALL, ZigBee, BT, WIFI, NB-loT and the like.

The commercial power is sent to the first rectifying module group 32 and the second rectifying module group through the ac power distribution module and the ac lightning protection module, is output by the first rectifying module group 32, is output to the rear-stage power distribution line through the first dc power distribution module and the first dc lightning protection module, and is finally supplied to the dc lamp 28, and is output by the second rectifying module group, is output to the rear-stage power distribution line through the second dc power distribution module and the second dc lightning protection module, and is finally supplied to the advertisement lamp box 29.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A dc-powered power distribution structure, comprising: the control terminal comprises a direct current positive line, a direct current neutral line and a direct current negative line, the direct current electric appliance is connected between the direct current positive line and the direct current neutral line and between the direct current negative line and the direct current neutral line, the direct current positive line, the direct current negative line and the direct current neutral line are connected to the direct current cabinet, the direct current cabinet is electrically connected with a mains supply, and the control terminal is in signal connection with the direct current cabinet.

2. A dc power distribution structure according to claim 1, wherein: and the direct current electric appliances connected to the direct current positive line and the direct current electric appliances connected to the direct current negative line are arranged at intervals and are equal in number.

3. A dc power distribution structure according to claim 1, wherein: the DC cabinet comprises: the alternating current power distribution module comprises an alternating current power distribution module, an alternating current lightning protection module, a rectifier module group, a first direct current power distribution module and a first direct current lightning protection module, wherein the direct current positive line comprises a first direct current positive line, the direct current negative line comprises a first direct current negative line, the direct current central line comprises a first direct current central line, the rectifier module group comprises a first rectifier module group, the first rectifier module group comprises a first positive rectifier module group and a first negative rectifier module group, the first positive rectifier module group and the first negative rectifier module group are arranged in parallel, the input end of the alternating current power distribution module is electrically connected with commercial power, the output end of the alternating current power distribution module is electrically connected with the input end of the alternating current lightning protection module, the alternating current lightning protection module is electrically connected with the input end of the first rectifier module group, and the output end of the first positive rectifier module group is electrically connected with the positive input end of the first direct current power distribution, the output end of the first negative pole rectification module group is electrically connected with the negative pole input end of the first direct current distribution module, the positive pole output end of the first direct current distribution module is electrically connected with the positive pole input end of the first direct current lightning protection module, the negative pole output end of the first direct current distribution module is electrically connected with the negative pole input end of the first direct current lightning protection module, and the first direct current lightning protection module outputs a first direct current positive line and a first direct current negative line.

4. A dc power distribution structure according to claim 3, wherein: the direct current positive line includes a second direct current positive line, the direct current negative line includes a second direct current negative line, the direct current neutral line includes a second direct current neutral line, and the direct current cabinet further includes: a second direct current distribution module and a second direct current lightning protection module, the rectifier module group also comprises a second rectifier module group, the second rectifying module group comprises a second anode rectifying module group and a second cathode rectifying module group, the second anode rectifying module group and the second cathode rectifying module group are arranged in parallel, the alternating current lightning protection module is also electrically connected with the input end of the second rectifying module group, the output end of the second anode rectifying module group is electrically connected with the anode input end of the second direct current distribution module, the output end of the second negative pole rectifying module group is electrically connected with the negative pole input end of the second direct current distribution module, the positive output end of the second direct current distribution module is electrically connected with the positive input end of the second direct current lightning protection module, the negative electrode output end of the second direct current distribution module is electrically connected with the negative electrode input end of the second direct current lightning protection module, the second direct current lightning protection module outputs the second direct current positive line and the second direct current negative line.

5. A DC-powered power distribution structure as claimed in claim 4, characterized in that: still include in the direct current cabinet: the direct current power distribution system comprises a DCU main control unit, an alternating current side detection module, a direct current side insulation detection module and a DTU communication module, wherein the DCU main control unit is respectively electrically connected with a positive pole rectification module group, a negative pole rectification module group, the alternating current side detection module, the direct current side insulation detection module and the DTU communication module, the alternating current side detection module is respectively electrically connected with an alternating current power distribution module and an alternating current lightning protection module, the direct current side detection module is respectively electrically connected with a first direct current power distribution module, a second direct current power distribution module, a first direct current lightning protection module and a second direct current lightning protection module, and the direct current insulation detection module is electrically connected with the direct current side detection module.

6. A dc power distribution structure according to claim 3, wherein: the direct-current electric appliance comprises a direct-current lamp, the direct-current lamp comprises a direct-current driver and a light source module, the direct-current lamp comprises a yellow lamp bead and a white lamp bead, the yellow lamp bead is connected between a first direct-current positive line and a first direct-current central line, and the white lamp bead is connected between a first direct-current negative line and the first direct-current central line.

7. A DC-powered power distribution structure as claimed in claim 4, characterized in that: the direct current electric appliance further comprises an advertising lamp box which is connected between the second direct current positive line and the second direct current central line and between the second direct current negative line and the second direct current central line.

8. A dc power distribution structure according to claim 5, wherein: the DCU main control unit is also electrically connected with the multifunctional expansion module and the electrical appliance communication module respectively.