CN220826485U - Electric vehicle charging power system based on off-grid wind generating set - Google Patents
Electric vehicle charging power system based on off-grid wind generating set Download PDFInfo
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- CN220826485U CN220826485U CN202322485623.XU CN202322485623U CN220826485U CN 220826485 U CN220826485 U CN 220826485U CN 202322485623 U CN202322485623 U CN 202322485623U CN 220826485 U CN220826485 U CN 220826485U
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Abstract
The utility model discloses an electric vehicle charging power system based on an off-grid wind generating set, which comprises the off-grid wind generating set, an off-grid power network, a control system, an energy storage system and an electric vehicle charging system, wherein the off-grid wind generating set is connected with the off-grid power network and is used for providing electric energy, the off-grid power network is connected with the electric vehicle charging system, the energy storage system is connected with the off-grid power network and is used for storing the electric energy and providing the electric vehicle charging system with the electric energy under the low wind speed working condition of the off-grid wind generating set, and the control system is connected with the off-grid power network and is used for controlling the output of the off-grid wind generating set and controlling the electric energy distribution between the energy storage system and the electric vehicle charging system. The utility model solves the problems of system load increase, system transmission pressure increase and the like caused by the uncertainty of the charging load of the electric vehicle, realizes off-grid charging of large-scale new energy vehicles, and meets the requirements of timeliness and capacity of the large-scale new energy vehicles.
Description
Technical Field
The utility model relates to the technical field of wind power generation, in particular to an electric vehicle charging power system based on an off-grid wind generating set.
Background
At present, the electric vehicle is charged by being connected with a public power grid, but the randomness of the charging capacity requirement of the electric vehicle greatly increases the scheduling difficulty of an electric power system. In remote areas without a power grid or with limited power grid capacity, the charging problem cannot be solved, and the application of large-batch new energy vehicles is difficult to realize. Meanwhile, when the number of the electric vehicles connected to the power grid is large, the problem of load fluctuation of the power distribution network can be caused, and a large number of electric vehicles are charged unordered, so that serious threat to economy and safety can be caused.
Wind energy is used as an environment-friendly green energy source, and can be used for providing an off-grid and environment-friendly charging scheme for the electric vehicle, so that real green travel is realized. At present, some researches are carried out on off-grid charging of an electric vehicle by using a wind generating set in the industry, but the flexibility of how to realize the charging time under the output of the fluctuating wind generating set and the requirement of meeting the simultaneously chargeable capacity are to be solved.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, provides an electric vehicle charging power system based on an off-grid wind generating set, solves the problems of system load increase, system transmission pressure increase and the like caused by electric vehicle charging load uncertainty, realizes off-grid charging of a large-scale new energy vehicle, and meets the timeliness and capacity requirements of the large-scale new energy vehicle.
The aim of the utility model can be achieved by adopting the following technical scheme:
The utility model provides an electric motor car charging power system based on off-grid wind generating set, includes off-grid wind generating set, off-grid power network, control system, energy storage system and electric motor car charging system, off-grid wind generating set is connected with off-grid power network for provide the electric energy, off-grid power network is connected with electric motor car charging system, energy storage system is connected with off-grid power network for store the electric energy, and provide the electric motor car charging system with the electric energy under the low wind speed operating mode of off-grid wind generating set, control system is connected with off-grid power network for control off-grid wind generating set is exerted oneself, and control by off-grid wind generating set to energy storage system and electric motor car charging system between the electric energy distribution.
Further, the off-grid wind generating sets are multiple, and the off-grid wind generating sets are connected to an off-grid power network in a parallel mode.
Further, the generator of the off-grid wind generating set is arranged in the cabin.
Further, the generator is a medium voltage alternating current generator, the output voltage of the generator is 3kV at the minimum, the output of the generator is connected to an AC/DC rectifier of the off-grid wind generating set, and the AC/DC rectifier is arranged at the bottom of the inside of the tower barrel or outside the tower barrel of the off-grid wind generating set.
Further, the generator includes, but is not limited to, a permanent magnet synchronous generator, a single feed asynchronous generator, and a superconducting generator, and the AC/DC rectifier adopts a three-level structure or a medium voltage multi-level structure.
Further, the off-grid power network comprises a direct current cable for connecting the off-grid wind generating set and a DC/DC conversion system for converting medium-voltage direct current electric energy output by the off-grid wind generating set and the energy storage system into low-voltage direct current electric energy meeting the charging standard of the electric vehicle, wherein the DC/DC conversion system is connected with the direct current cable, and the topological structure of the DC/DC conversion system is in the form of a double-active bridge or a resonant converter so as to realize bidirectional tide flow.
Further, the DC/DC conversion system is formed by connecting a plurality of groups of modularized DC/DC converters in series, and the output sides of the plurality of groups of modularized DC/DC converters are respectively connected with a plurality of electric vehicle charging stations of the electric vehicle charging system in a one-to-one correspondence manner.
Further, the DC/DC conversion system is composed of a single set of high-power medium-voltage DC/DC converters, and the output of the DC/DC conversion system is provided with a plurality of sets of power ports which are connected in parallel and can simultaneously supply power to a plurality of electric vehicle charging stations.
Further, the minimum distance between the DC/DC conversion system and the electric vehicle charging system and the off-grid wind generating set is greater than or equal to a preset safety distance.
Further, the electric vehicle charging system comprises a plurality of electric vehicle charging stations arranged in parallel, and each electric vehicle charging station is composed of a direct current charging pile for providing electric energy for the electric vehicle and a direct current distribution network connection for providing distribution electric energy for the direct current charging pile.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. According to the utility model, the off-grid wind power generator set is utilized to connect the electric vehicle charging system into the off-grid power network, so that a large amount of electric vehicle charging application can be realized in an area without power grid coverage, the off-grid charging is performed on a large-scale new energy vehicle, and the timeliness and capacity requirements of the large-scale new energy vehicle are met.
2. The utility model combines wind energy, an energy storage battery and an electric vehicle, has the advantages of energy complementation and on-site renewable energy source absorption, and realizes true low-carbon environmental protection.
Drawings
Fig. 1 is a general structural diagram of an electric vehicle charging power system of the present utility model.
Fig. 2 is an electrical schematic diagram of the DC/DC conversion system in example 1.
Fig. 3 is an electrical schematic diagram of the DC/DC conversion system in example 2.
Fig. 4 is a physical layout diagram of the electric vehicle charging power system of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.
Example 1:
As shown in fig. 1 and 4, the embodiment provides an electric vehicle charging power system based on an off-grid wind generating set, which comprises an off-grid wind generating set 1, an off-grid power network 2, a control system 3, an energy storage system 4 and an electric vehicle charging system, wherein the off-grid wind generating set 1 is connected with the off-grid power network 2 and is used for providing electric energy, the off-grid power network 2 is connected with the electric vehicle charging system, the energy storage system 4 is connected with the off-grid power network 2 and is used for storing electric energy and providing electric energy for the electric vehicle charging system under the low wind speed working condition of the off-grid wind generating set 1 (i.e. when the output of the wind generating set is lower), and the control system 3 is connected with the off-grid power network 2 and is used for controlling the output of the off-grid wind generating set 1 and the electric energy distribution from the off-grid wind generating set 1 to the energy storage system 4 and the electric vehicle charging system.
Specifically, the embodiment can also adopt a plurality of off-grid wind power generator sets to provide electric energy according to actual electric power requirements, and connect the off-grid wind power generator sets to an off-grid electric power network in a parallel mode.
Specifically, the generator of the off-grid wind generating set is arranged in the cabin. In view of reducing transmission losses inside the wind power plant and throughout the off-grid power network, the generator employs a medium voltage alternator and provides a medium voltage ac output. Preferably, the generator output voltage is at least 3kV, and medium voltage alternators include, but are not limited to: permanent magnet synchronous generator, single-fed asynchronous generator and high-temperature superconductive generator.
The medium-voltage alternating current output of the generator is connected to an AC/DC rectifier of the off-grid wind generating set, and the AC/DC rectifier can be arranged in a container at the bottom of the inside of a tower barrel or at the outside of the tower barrel of the off-grid wind generating set and adopts a three-level structure or a medium-voltage multi-level structure due to the fact that the medium-voltage alternating current generator is used for reducing transmission loss.
Specifically, the off-grid power network 2 includes a DC cable 202 for connecting to an off-grid wind turbine generator system, and a DC/DC conversion system 201 for converting medium-voltage DC power output by the off-grid wind turbine generator system and the energy storage system into low-voltage DC power meeting the charging standard of the electric vehicle, where the DC/DC conversion system 201 is connected to the DC cable 202, and the off-grid power network is further configured with protection equipment for protecting a loop, and the topology structure of the DC/DC conversion system is in the form of a dual-active bridge or a resonant converter, so as to realize bidirectional tidal current flow. The electric power supply system can supply electric power to the electric vehicle charging station through bidirectional tide flow, and can feed the electric power generated by electric vehicle discharging back to the off-grid power network under specific requirements, so that fluctuation of the off-grid power network is restrained.
As shown in fig. 2, the DC/DC conversion system is formed by connecting multiple groups of modularized DC/DC converters in series, the medium voltage DC output side of the off-grid wind turbine generator system is connected in parallel with the medium voltage DC output side of the energy storage system, and the input side of the multiple groups of modularized DC/DC converters connected in series is connected, the output sides of the multiple groups of modularized DC/DC converters are respectively connected with multiple electric vehicle charging stations of the electric vehicle charging system in a one-to-one correspondence manner, and each electric vehicle charging station can charge a single electric vehicle or multiple electric vehicles simultaneously.
In this embodiment, the energy storage system may be disposed near the off-grid wind turbine generator system as needed, and may be mounted with the AC/DC rectifier in a common or independent container or protective enclosure. As shown in fig. 4, the minimum distance between the DC/DC conversion system and the electric vehicle charging system and the off-grid wind turbine generator system is greater than or equal to a preset safety distance, for example, 50m or more than 100 m. Alternatively, the energy storage system may be disposed adjacent to the DC/DC conversion system and mounted with the DC/DC conversion system in a common or independent protective enclosure.
Specifically, the electric vehicle charging system comprises a plurality of electric vehicle charging stations 5 which are arranged in parallel, each electric vehicle charging station is formed by connecting a direct current charging pile and a direct current distribution network, the direct current distribution network comprises a direct current cable and direct current protection equipment and is responsible for providing distribution electric energy for the direct current charging pile, the direct current charging pile is used as a charging terminal, electric energy is provided for the electric vehicle, and a man-machine interaction operation interface, a battery state real-time monitoring function and a fault protection function are provided.
In addition, the randomness of wind power generation and the interval time-varying characteristic of the load of the electric vehicle are considered, in practical application, the function of the control system can be further expanded, the electric vehicle is optimally scheduled to be charged and discharged through the control system, and the energy storage system is matched, so that the fluctuation suppression of the off-grid power system is realized. The output capacity of each fan in different time periods can be generated according to the local meteorological information, and a chargeable plan in different time periods is generated for the electric vehicle charging station by referring to the residual electric energy of the energy storage system.
Example 2:
As shown in fig. 3, this embodiment is different from embodiment 1 in that: the DC/DC conversion system consists of a single group of high-power medium-voltage DC/DC converters, the output of which is provided with a plurality of groups of power ports (DC 1 < + >, DC1 < - > -DCn < + >, DCn < - >) which are connected in parallel, and can supply power to 1 to n electric vehicle charging stations at the same time.
The above description is only of the preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive conception of the present utility model equally within the scope of the disclosure of the present utility model.
Claims (10)
1. Electric motor car charging power system based on off-grid wind generating set, its characterized in that: including off-grid wind generating set, off-grid power network, control system, energy storage system and electric motor car charging system, off-grid wind generating set is connected with off-grid power network for provide the electric energy, off-grid power network is connected with electric motor car charging system, energy storage system is connected with off-grid power network, is used for storing the electric energy, and provides the electric energy to electric motor car charging system under the low wind speed operating mode of off-grid wind generating set, control system is connected with off-grid power network, is used for controlling the output of off-grid wind generating set, and control by the electric energy distribution between off-grid wind generating set to energy storage system and electric motor car charging system.
2. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 1, wherein: the off-grid wind power generator sets are connected to an off-grid power network in parallel.
3. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 2, wherein: the generator of the off-grid wind generating set is arranged in the cabin.
4. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 3, wherein: the generator is a medium-voltage alternating-current generator, the output voltage of the generator is 3kV at the minimum, the output of the generator is connected to an AC/DC rectifier of the off-grid wind generating set, and the AC/DC rectifier is arranged at the bottom of the inside of a tower barrel or outside the tower barrel of the off-grid wind generating set.
5. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 4, wherein: the generator includes but is not limited to a permanent magnet synchronous generator, a single feed asynchronous generator and a high temperature superconductive generator, and the AC/DC rectifier adopts a three-level structure or a medium voltage multi-level structure.
6. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 1, wherein: the off-grid power network comprises a direct current cable used for being connected with an off-grid wind generating set and a DC/DC conversion system used for converting medium-voltage direct current electric energy output by the off-grid wind generating set and the energy storage system into low-voltage direct current electric energy meeting the charging standard of the electric vehicle, wherein the DC/DC conversion system is connected with the direct current cable, and the topological structure of the DC/DC conversion system is in the form of a double-active bridge or a resonant converter so as to realize bidirectional tide flow.
7. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 6, wherein: the DC/DC conversion system is formed by connecting a plurality of groups of modularized DC/DC converters in series, and the output sides of the plurality of groups of modularized DC/DC converters are respectively connected with a plurality of electric vehicle charging stations of the electric vehicle charging system in a one-to-one correspondence manner.
8. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 6, wherein: the DC/DC conversion system consists of a single group of high-power medium-voltage DC/DC converters, and the output of the DC/DC conversion system is provided with a plurality of groups of power ports which are connected in parallel and can simultaneously supply power to a plurality of electric vehicle charging stations.
9. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 6, wherein: the minimum distance between the DC/DC conversion system and the electric vehicle charging system and the off-grid wind generating set is greater than or equal to a preset safety distance.
10. The off-grid wind turbine generator system-based electric vehicle charging power system of claim 1, wherein: the electric vehicle charging system comprises a plurality of electric vehicle charging stations which are arranged in parallel, and each electric vehicle charging station is formed by connecting a direct current charging pile for providing electric energy for an electric vehicle and a direct current distribution network for providing distributed electric energy for the direct current charging pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322485623.XU CN220826485U (en) | 2023-09-13 | 2023-09-13 | Electric vehicle charging power system based on off-grid wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322485623.XU CN220826485U (en) | 2023-09-13 | 2023-09-13 | Electric vehicle charging power system based on off-grid wind generating set |
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| CN220826485U true CN220826485U (en) | 2024-04-23 |
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| CN202322485623.XU Active CN220826485U (en) | 2023-09-13 | 2023-09-13 | Electric vehicle charging power system based on off-grid wind generating set |
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| CN (1) | CN220826485U (en) |
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- 2023-09-13 CN CN202322485623.XU patent/CN220826485U/en active Active
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