CN214673871U - Inverter overhaul room - Google Patents
Inverter overhaul room Download PDFInfo
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- CN214673871U CN214673871U CN202120828570.5U CN202120828570U CN214673871U CN 214673871 U CN214673871 U CN 214673871U CN 202120828570 U CN202120828570 U CN 202120828570U CN 214673871 U CN214673871 U CN 214673871U
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Abstract
The utility model discloses an inverter overhaul room, include: the standby inverter is used for replacing the inverter to be detected and is connected to a circuit of the photovoltaic power station; the maintenance room body is used for providing maintenance space for the inverter to be detected; DC power supply, it set up in near overhaul room body, DC power supply is used for providing DC voltage to waiting to examine the dc-to-ac converter, DC power supply's voltage is greater than the starting voltage who waits to examine the dc-to-ac converter. The utility model discloses have and show the stop power generation time that reduces during the maintenance, promote the beneficial effect of dc-to-ac converter maintenance environment.
Description
Technical Field
The utility model relates to an inverter overhauls technical field. More specifically, the utility model relates to an inverter overhaul room.
Background
The inverter maintenance problem is the universality problem of the photovoltaic power station, therefore, an inverter maintenance room is designed for the inverter maintenance, the inverter fault processing time is shortened, the loss electric quantity is reduced to the minimum, and the improvement of the working environment of personnel is taken as the primary objective and is worth researching.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model discloses it is still another purpose to provide an inverter overhaul room, can show the stop power generation time that reduces during the maintenance, promotes the inverter maintenance environment.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an inverter service room including:
the standby inverter is used for replacing the inverter to be detected and is connected to a circuit of the photovoltaic power station;
the maintenance room body is used for providing maintenance space for the inverter to be detected;
DC power supply, it set up in near overhaul room body, DC power supply is used for providing DC voltage to waiting to examine the dc-to-ac converter, DC power supply's voltage is greater than the starting voltage who waits to examine the dc-to-ac converter.
Preferably, the inverter is a string photovoltaic inverter;
the direct current power supply includes:
the photovoltaic module bracket is arranged on the periphery of the overhaul room body;
the photovoltaic power supply comprises a plurality of photovoltaic components, wherein the photovoltaic components are installed on a photovoltaic component support, the photovoltaic components are connected in series to form a photovoltaic power supply, a direct current cable of the photovoltaic power supply is connected in series with a direct current input end of the inverter to be detected, and a direct current power supply switch is connected in series on the direct current cable.
Preferably, the number of the photovoltaic modules is 18, and the power of the photovoltaic modules is 330W.
Preferably, the direct current cable is connected with the inverter to be detected through an MC master-slave plug.
Preferably, the power supply further comprises a transformer, the transformer is connected with the alternating current output end of the inverter to be detected through an alternating current cable, and the output end of the transformer is connected with a power utilization system.
Preferably, an alternating current power switch and an alternating current power knife switch are connected in series on the alternating current cable of the transformer and the inverter to be detected.
Preferably, the transformer is a dry type transformer.
Preferably, the transformer is a 540V/400V dry-type transformer;
the power distribution cabinet of the power utilization system is provided with a 400V bus, and the output end of the transformer is connected with the 400V bus of the power distribution cabinet.
Preferably, the system further comprises a common inverter for replacing the inverter to be detected, and a direct-current cable input end and an alternating-current output end of the common inverter are respectively and correspondingly connected with the direct-current power supply and the transformer.
The utility model discloses at least, include following beneficial effect:
firstly, when the number of inverters of a photovoltaic power station is large, the failure rate is high, and more electric quantity loss is easily caused. The power failure time for replacing the inverter is far shorter than that for overhauling the inverter on site, and the loss of electric quantity can be reduced to the maximum extent.
Second, photovoltaic district site environment are complicated, are unfavorable for maintenance work, the utility model discloses improve personnel and overhaul the operation environment, realized by the abominable maintenance environment in scene to the transformation of indoor comfortable environment.
Thirdly, under the condition that the inverter is not overhauled, the generated energy of the outdoor matched photovoltaic module can be supplied to an electric system through one normal inverter, and the power generation function of the photovoltaic module is fully exerted.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic connection diagram of components according to one embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the utility model provides an inverter overhaul room, include:
the standby inverter is used for replacing the inverter to be detected and is connected to a circuit of the photovoltaic power station;
the maintenance room body is used for providing maintenance space for the inverter to be detected;
DC power supply, it set up in near overhaul room body, DC power supply is used for providing DC voltage to waiting to examine the dc-to-ac converter, DC power supply's voltage is greater than the starting voltage who waits to examine the dc-to-ac converter.
In the technical scheme, firstly, a worker conveys the standby inverter to the position of the inverter to be detected, then the standby inverter is used for replacing the inverter to be detected and is connected to a circuit of the photovoltaic power station, the replacement process can be completed within half an hour, after the standby inverter is connected, the photovoltaic power station can normally generate electricity, and the loss of generated energy is small. Then will wait to examine the dc-to-ac converter and transport back to the maintenance room body again, an indoor maintenance space promptly, the detection instrument can be neatly complete place in the maintenance room body, and also can not receive the influence of blowing the rain, can wait to examine the dc-to-ac converter and maintain, work as the maintenance is complete, can be connected it with DC power supply, in order to detect whether the dc-to-ac converter normally operates, if abnormal operation, then can arrange again in the maintenance room body, maintain once more, until waiting to examine the inverter normal operating, then transport the inverter that has maintained to the original position again, replace reserve inverter, reconnect to in photovoltaic power plant's the circuit, play a role. And the standby inverter is available for the next maintenance.
Through the maintenance mode, when the inverter breaks down, the time for recovering power generation can be obviously reduced, and the time for working personnel in outdoor severe environment can be reduced.
In another technical scheme, the inverter is a string-type photovoltaic inverter;
the direct current power supply includes:
the photovoltaic module bracket is arranged on the periphery of the overhaul room body;
polylith photovoltaic module 1, polylith photovoltaic module 1 install in on the photovoltaic module support, polylith photovoltaic module 1 establishes ties and forms photovoltaic power supply, photovoltaic power supply's direct current cable and the direct current input of waiting to examine the dc-to-ac converter establish ties, it has direct current power switch 2 to establish ties on the direct current cable.
In the technical scheme, the photovoltaic module 1 is used as a direct current power supply to provide starting direct current voltage for the inverter, and solar energy can be fully utilized.
In another technical scheme, the number of the photovoltaic modules 1 is 18, and the power of the photovoltaic modules 1 is 330W. A dc voltage of about 730V can be generated to start the string inverter.
In another technical scheme, the direct current cable is connected with the inverter to be detected through an MC primary-secondary plug. The connection is quick, and the current is stable.
In another technical scheme, the device further comprises a transformer 4, wherein the transformer 4 is connected with an alternating current output end of the inverter to be detected through an alternating current cable, and an output end of the transformer 4 is connected with an electric system.
In the above technical scheme, after the transformer 4 is connected, the alternating current transformed by the inverter to be detected can be transformed to the target voltage, namely, the alternating current is transformed to the standard voltage, and the standard voltage can be supplied to the power system, so that the inverter to be detected can be detected, and the generated energy in the detection process can be used for the power system.
In another technical scheme, an alternating current power switch 5 and an alternating current power knife switch 6 are connected in series on alternating current cables of the transformer 4 and the inverter to be detected. When the inverter to be detected is installed and removed, the alternating current power switch 5 and the alternating current power knife switch 6 can be disconnected, and the effect of ensuring safety is achieved.
In another technical solution, the transformer 4 is a dry-type transformer. Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC machines and other places, and simply, dry-type transformers refer to transformers in which iron cores and windings are not immersed in insulating oil. The dry-type transformer is suitable for intermittent overload operation or emergency accident overload operation, and therefore, the dry-type transformer is more suitable for the inverter to be detected.
In another technical solution, the transformer 4 is a 540V/400V dry transformer;
the power distribution cabinet of the power utilization system is provided with a 400V bus 8, and the output end of the transformer 4 is connected with the 400V bus 8 of the power distribution cabinet. And the transformer 4 matched with the voltage of the power utilization system bus 8 is adopted, so that the power utilization safety and the power utilization efficiency are improved.
In another technical scheme, the system further comprises a common inverter for replacing the inverter to be detected, and a direct current cable input end and an alternating current output end of the common inverter are respectively and correspondingly connected with the direct current power supply and the transformer 4.
In above-mentioned technical scheme, when need not wait to examine the maintenance of dc-to-ac converter, can connect inverter commonly used between photovoltaic module 1 and transformer 4, established a miniature photovoltaic power plant in other words, can continuously be for the power supply of electric system, photovoltaic module 1 that make full use of built.
< example >
As shown in fig. 1, the circuit connection diagram of this embodiment includes a photovoltaic module 1, a dc power switch 2, an inverter 3 to be detected, a transformer 4, an ac power switch 5, an ac power switch 6, a voltmeter 7, a bus 8, a transformer switch 9, and a switch 10 of a power distribution cabinet.
An inverter overhaul room (an inverter overhaul room) of a Taiping maintenance center station utilizes the photovoltaic principle and needs to provide a stable alternating current and direct current power supply. Firstly, building a photovoltaic module bracket, and utilizing 18 photovoltaic modules 1 of 'hundred million crystal 330W' which have defects but do not influence normal power generation to be installed and connected in series to form a series of maintenance room matched direct current power supplies reaching the starting voltage of the string type inverter. The led-out direct current cable is put through a tube and then connected with a direct current power switch 2 in series. And stripping the tail end of the direct-current cable, manufacturing a pair of MC4 primary and secondary plugs, and inserting the primary and secondary plugs into a direct-current side plug of the group string type inverter. Three AC cables wound with phase-color insulating tapes are connected to an AC terminal of the group-string inverter, then an AC power switch 5 and an AC power switch 6 are connected in series, and a voltmeter 7 is connected in parallel between phases. And the led-out three-phase alternating-current cable is connected into a standby 540V/400V dry-type transformer through a pipe, and then is connected into an outdoor power distribution cabinet in series with a dry-type transformer power switch.
When the illumination intensity reaches a certain degree, the photovoltaic module 1 in the DC power supply matched with the overhaul room generates about 730V DC voltage, so that the group string type inverter is started. And the direct current passes through the direct current collecting plate, and the group string current is collected and enters the direct current filter plate. And filtering and sampling the direct current in a direct current filter plate, and transmitting the direct current to a direct current boosting plate. The current finishes boosting through the direct current boosting plate and enters the inverter plate. The direct current is inverted into alternating current in the inverter board and is transmitted to the inverter control board. The inverter control board controls and samples all the components and transmits alternating current to the alternating current filter board. The alternating current filter board filters alternating current, and the alternating current is transmitted to the 540V/400V dry-type transformer through the alternating current power switch 5 and the alternating current power switch 6. The dry-type transformer reduces the 540V alternating voltage to 400V alternating voltage, the voltage flows to a 400V bus 8 of the outdoor power distribution cabinet through the dry-type power change switch, and the voltage is incorporated into a station power system.
The establishment of an inverter overhaul room (inverter overhaul room) of the Taiping maintenance center station realizes the following functions: firstly, the inverter maintenance time is greatly shortened, and the inverter maintenance efficiency is improved. In a traditional working mode, the maintenance of the photovoltaic area of the Ethernet power station in a complex environment needs about 2-3 hours; at present, when the inverter breaks down, the failed inverter is replaced by a standby inverter to normally generate electricity, the work can be completed within about 0.5h, and then the failed inverter is conveyed to the overhaul room to be processed. In a new maintenance mode, the maintenance of each inverter can reduce the loss electric quantity by 80-100 kWh, and the loss electric quantity is reduced by about 1.4 ten thousand kWh through accumulation until the inverter is put into operation; secondly, under the condition that the inverter is not overhauled, the generated energy of the outdoor matched photovoltaic assembly 1 can be supplied to a plant power system through a normal inverter, the plant power is reduced by about 660kWh every month, and the effect of reducing the plant power rate to a certain extent is achieved; thirdly, a good overhaul learning platform is provided for the station staff in the inverter overhaul room, the understanding of each staff on the structure and the principle of the inverter is enhanced through overhaul practical training, and the overhaul capacity is practically improved; fourthly, the overhaul operation environment of personnel is improved, and the transformation from the abominable overhaul environment to the indoor comfortable environment is realized. The basic problem of field maintenance is solved by establishing the maintenance room of the inverter of the peaceful maintenance center station. From the perspective of changing the working mode of field personnel, the new mode of 'replacing first and then maintaining' shortens the power failure time of the inverter and reduces the loss electric quantity to the maximum extent. From the angle of changing on-the-spot personnel operational environment, its establishment has reduced the operating time of staff in complicated abominable photovoltaic district, has reduced the risk that the maintainer falls into water, electrocutes, multiplexer utensil loses, has improved factor of safety. From the perspective of reducing the station service power consumption of the peace dimension detection center station, the standby inverter is utilized to generate power under the condition of no maintenance task and is merged into a service power system, so that the station service power consumption is reduced, and old spare parts are utilized to the maximum extent.
The inverter maintenance room of the central station is maintained in the peaceful mode, and the project is suitable for local popularization under specific conditions. Firstly, the Taiping power station adopts a string inverter, and the string inverter is characterized by small volume and convenient replacement and maintenance, and provides a prerequisite for changing the overhaul environment from a complex outdoor environment to a comfortable indoor environment. Secondly, the number of the photovoltaic region inverters is 3185, the number is large, the failure rate is high, and more electric quantity loss is easily caused. The power failure time for replacing the inverter is far shorter than that for overhauling the inverter on site, and the loss of electric quantity can be reduced to the maximum extent. Finally, the field environment of the photovoltaic region is complex, which is not beneficial to maintenance work. Therefore, the project provides a template for a photovoltaic power station with a group string type inverter, high inverter failure rate and complex field overhaul environment.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (8)
1. Inverter overhauls room, its characterized in that includes:
the standby inverter is used for replacing the inverter to be detected and is connected to a circuit of the photovoltaic power station;
the maintenance room body is used for providing maintenance space for the inverter to be detected;
the direct current power supply is arranged near the overhaul room body and used for providing direct current voltage for the inverter to be tested, and the voltage of the direct current power supply is greater than the starting voltage of the inverter to be tested;
the inverter is a string photovoltaic inverter;
the direct current power supply includes:
the photovoltaic module bracket is arranged on the periphery of the overhaul room body;
the photovoltaic power supply comprises a plurality of photovoltaic components, wherein the photovoltaic components are installed on a photovoltaic component support, the photovoltaic components are connected in series to form a photovoltaic power supply, a direct current cable of the photovoltaic power supply is connected in series with a direct current input end of the inverter to be detected, and a direct current power supply switch is connected in series on the direct current cable.
2. The inverter service room of claim 1 wherein the number of photovoltaic modules is 18 and the power of the photovoltaic modules is 330W.
3. The inverter service room of claim 1 wherein the dc cable is connected to the inverter to be tested via an MC daughter-mother plug.
4. The inverter service room of claim 1 further comprising a transformer connected to the ac output of the inverter to be tested by an ac cable, the output of the transformer being connected to the power utility system.
5. The inverter maintenance room of claim 4, wherein an AC power switch and an AC power knife switch are connected in series to the AC cable of the transformer and the inverter to be tested.
6. The inverter service room of claim 4 wherein the transformer is a dry-type transformer.
7. The inverter service room of claim 4 wherein the transformer is a 540V/400V dry transformer;
the power distribution cabinet of the power utilization system is provided with a 400V bus, and the output end of the transformer is connected with the 400V bus of the power distribution cabinet.
8. The inverter service room of claim 4 further comprising a common inverter for replacing the inverter to be tested, wherein the input end and the output end of the dc cable of the common inverter are respectively connected to the dc power supply and the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120828570.5U CN214673871U (en) | 2021-04-21 | 2021-04-21 | Inverter overhaul room |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120828570.5U CN214673871U (en) | 2021-04-21 | 2021-04-21 | Inverter overhaul room |
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| CN214673871U true CN214673871U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11881672B1 (en) | 2021-11-24 | 2024-01-23 | Gridworks, Inc. | Quick connection system for energy storage and photovoltaic equipment |
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2021
- 2021-04-21 CN CN202120828570.5U patent/CN214673871U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11881672B1 (en) | 2021-11-24 | 2024-01-23 | Gridworks, Inc. | Quick connection system for energy storage and photovoltaic equipment |
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