Wind-solar-diesel storage and charging integrated equipment applicable to multiple scenes

Abstract

The utility model belongs to the technical field of power supply equipment, and particularly discloses a wind-light-diesel storage and charging integrated device applicable to multiple scenes, which integrates a multifunctional energy device by efficiently integrating a power generation system, a power storage system and a charging system, shows the applicability of the device in multiple scenes, can meet the electric energy requirements in various environments, and has a wide application prospect. Effective switching between different energy ends can be realized, and stability and reliability of equipment power supply are ensured. Moreover, through the coupling technology on the direct current bus, the electric energy loss in the alternating current and direct current conversion process is effectively reduced, the overall energy utilization efficiency is remarkably improved, and the positive effects of energy conservation and emission reduction are embodied. And meanwhile, the renewable energy power generation system and the energy storage system are used for supplying power to new energy equipment, and the advantages of high efficiency and environmental protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power supply equipment technical field, concretely relates to a wind and light and diesel storage integrated equipment applicable to multiple scenes. BACKGROUND

[0002] With the continuous popularity of new energy vehicles, the demand for charging facilities continues to grow, and the demand for energy security, environmental protection and energy saving of enterprises and power grid operators is also rising, and the power supply of charging facilities is facing many challenges. Therefore, the development of multifunctional charging facilities for various scene applications is of great significance to meet the diversified needs of the market.

[0003] Under the background of increasing attention to renewable energy worldwide, wind power generation, photovoltaic power generation, energy storage systems, charging piles and other equipment as the core part of clean energy solutions are gradually gaining market recognition, and the technology in a single device scenario has shown a high degree of maturity. However, how to effectively combine these device systems under the premise of multiple scene applications and solve the problem of interface operation compatibility is particularly significant. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a wind and light and diesel storage integrated equipment applicable to multiple scenes to solve the above problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of can be applicable to multi-scene's wind and light diesel storage and charge integrated equipment, including photovoltaic power generation end, diesel power generation access end, wind power generation access end, electric energy management system and charging end, the electric energy management system includes DC bus, energy storage module, photovoltaic power supply branch, diesel power supply branch, wind power supply branch, charging branch and main controller, the energy storage module electrically connected main controller, for accepting the control of main controller, from DC bus access bus DC power storage, or the electric energy output to DC bus of storage, the photovoltaic power supply branch is connected DC bus and photovoltaic power generation end respectively, for the photovoltaic DC power of photovoltaic power generation end input is transformed into bus DC power, and bus DC power is output to DC bus, the diesel power supply branch is connected DC bus and diesel power generation access end respectively, for the diesel generation access end input diesel generation AC rectification and voltage conversion is transformed into bus DC power, and bus DC power is output to DC bus, the wind power supply branch is connected DC bus and wind power generation access end respectively, for the wind power generation access end input wind power AC rectification and voltage conversion is transformed into bus DC power, and bus DC power is output to DC bus, the charging branch is connected DC bus and charging end respectively, for from DC bus access bus DC power voltage processing, obtain charging DC power, and charging DC power is output to charging end, the main controller is used to control photovoltaic power supply branch, diesel power supply branch, wind power supply branch and the on-off of charging branch.

[0007] In a possible design, the device further includes a power grid branch, the power grid branch is connected to the DC bus and the grid connection end respectively, for rectifying and voltage conversion of the grid input into bus DC power, and outputting the bus DC power to the DC bus, or inversely processing and voltage conversion of the DC bus input into grid AC power, and outputting the grid AC power to the grid connection end.

[0008] In a possible design, the power grid branch includes a first bidirectional energy storage converter, the first bidirectional energy storage converter is connected to the DC bus and the grid connection end respectively, and a switch is arranged between the first bidirectional energy storage converter and the grid connection end, and the first bidirectional energy storage converter is electrically connected to the main controller.

[0009] In a possible design, the device further includes a load branch, the load branch includes an STS static transfer switch, the input end of the STS static transfer switch is connected in parallel between the first bidirectional energy storage converter and the grid connection end, the output end is connected with a load end, and the STS static transfer switch is electrically connected to the main controller.

[0010] In a possible design, the wind power supply branch includes a second bidirectional energy storage converter, the second bidirectional energy storage converter is connected with the DC bus and the wind power access end respectively, and a power switch is arranged between the second bidirectional energy storage converter and the wind power access end, and the second bidirectional energy storage converter is electrically connected with the main controller.

[0011] In a possible design, the diesel power supply branch includes a third bidirectional energy storage converter, the third bidirectional energy storage converter is connected with the DC bus and the diesel power access end respectively, and a power switch is arranged between the third bidirectional energy storage converter and the diesel power access end, and the third bidirectional energy storage converter is electrically connected with the main controller.

[0012] In a possible design, the charging branch includes a first DC-DC converter, the first DC-DC converter is connected with the DC bus and the charging end respectively, and the first DC-DC converter is electrically connected with the main controller.

[0013] In a possible design, the photovoltaic power supply branch includes a second DC-DC converter, the second DC-DC converter is connected with the DC bus and the photovoltaic power generation end respectively, and the second DC-DC converter is electrically connected with the main controller.

[0014] In a possible design, the charging end includes a charging gun.

[0015] In a possible design, the photovoltaic power generation end includes a photovoltaic panel array, and the energy storage module includes an energy storage battery.

[0016] Beneficial effects: the power generation, energy storage and charging system are efficiently integrated, a multifunctional energy equipment is integrated, the applicability in multiple scenes is shown, the power demand in various environments can be met, the effective switching between different energy ends can be realized, the stability and reliability of equipment power supply are ensured, through the coupling technology on the DC bus, the power loss in the AC and DC conversion process is effectively reduced, the overall energy utilization efficiency is significantly improved, the positive role of energy saving and emission reduction is embodied, meanwhile, the renewable energy power generation system and the energy storage system are used to supply power for new energy equipment, and the advantages of high efficiency and environmental protection are embodied. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1The device circuit connection schematic diagram of the utility model;

[0019] Figure 2 The device simplified circuit connection schematic diagram of the utility model. DETAILED DESCRIPTION

[0020] It should be noted that the description of these example modes is used to help understand the utility model, but does not constitute the limitation of the utility model. The specific structure and functional details disclosed in this paper are only used to describe the example embodiments of the utility model. However, the utility model can be embodied in many alternative forms, and should not be understood as being limited in the embodiments set forth herein.

[0021] It should be understood that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the embodiments can be understood according to the specific circumstances.

[0022] In the following description, specific details are provided to facilitate a full understanding of the example embodiments. However, it should be understood by those skilled in the art that the example embodiments can be implemented without these specific details. For example, systems can be shown in block diagrams to avoid unnecessary details that make examples unclear. In other embodiments, well-known processes, structures and techniques can not be shown in unnecessary details to avoid making the embodiments unclear.

[0023] Embodiment:

[0024] The embodiment provides a wind-solar-diesel storage integrated equipment applicable to multiple scenes, such as Figure 1As shown, it comprises a photovoltaic power generation end, a diesel power generation access end, a wind power generation access end, an electric energy management system and a charging end. The electric energy management system comprises a direct current bus, an energy storage module, a photovoltaic power supply branch, a diesel power supply branch, a wind power supply branch, a charging branch and a main controller. The energy storage module is electrically connected to the main controller, used to accept the control of the main controller, access the bus direct current from the direct current bus for energy storage, or output the stored electric energy to the direct current bus. The photovoltaic power supply branch is connected to the direct current bus and the photovoltaic power generation end respectively, used to convert the photovoltaic direct current input by the photovoltaic power generation end into bus direct current, and output the bus direct current to the direct current bus. The diesel power supply branch is connected to the direct current bus and the diesel power generation access end respectively, used to rectify and convert the diesel alternating current input by the diesel power generation access end into bus direct current, and output the bus direct current to the direct current bus. The wind power supply branch is connected to the direct current bus and the wind power generation access end respectively, used to rectify and convert the wind alternating current input by the wind power generation access end into bus direct current, and output the bus direct current to the direct current bus. The charging branch is connected to the direct current bus and the charging end respectively, used to access the bus direct current from the direct current bus for voltage conversion, obtain charging direct current, and output the charging direct current to the charging end. The main controller is used to control the on-off of the photovoltaic power supply branch, the diesel power supply branch, the wind power supply branch and the charging branch.

[0025] In specific implementation, photovoltaic power generation can be carried out through the photovoltaic power generation end, and then the photovoltaic direct current generated by the photovoltaic power generation is transmitted to the photovoltaic power supply branch, which converts the photovoltaic direct current into bus direct current and outputs the bus direct current to the direct current bus. The diesel alternating current generated by the external diesel generator can be accessed through the diesel power generation access end, and then the diesel alternating current is rectified and converted into bus direct current through the diesel power supply branch, and the bus direct current is output to the direct current bus. The wind alternating current generated by the external wind generator can be accessed through the wind power generation access end, and then the wind alternating current is rectified and converted into bus direct current through the wind power supply branch, and the bus direct current is output to the direct current bus. The energy storage module can access the bus direct current from the direct current bus for energy storage, or output the stored electric energy to the direct current bus. The main controller can control the on-off of the photovoltaic power supply branch, the diesel power supply branch and the wind power supply branch, and the working state of the energy storage module, so as to select the corresponding energy supply end for bus power supply. The charging branch can access the bus direct current from the direct current bus for voltage conversion, obtain charging direct current, and output the charging direct current to the charging end, so as to charge the external new energy equipment by using the charging end.

[0026] Further, the device further comprises a commercial power branch, the commercial power branch is connected with the DC bus and the grid connection end respectively, and is used for rectifying and transforming the commercial power input by the grid connection end into the bus DC power and outputting the bus DC power to the DC bus, or inverting and transforming the bus DC power input by the DC bus into the commercial power and outputting the commercial power to the grid connection end. The commercial power branch can also be connected with the grid system to supply power to the device, and the excess power stored in the device can also be sent to the grid through the DC bus and the commercial power branch in reverse. The commercial power branch comprises a first bidirectional energy storage converter, the first bidirectional energy storage converter is connected with the DC bus and the grid connection end respectively, and a power switch is arranged between the first bidirectional energy storage converter and the grid connection end, and the first bidirectional energy storage converter is electrically connected with the main controller. The wind power supply branch comprises a second bidirectional energy storage converter, the second bidirectional energy storage converter is connected with the DC bus and the wind power generation access end respectively, and a power switch is arranged between the second bidirectional energy storage converter and the wind power generation access end, and the second bidirectional energy storage converter is electrically connected with the main controller. The diesel power supply branch comprises a third bidirectional energy storage converter, the third bidirectional energy storage converter is connected with the DC bus and the diesel power generation access end respectively, and a power switch is arranged between the third bidirectional energy storage converter and the diesel power generation access end, and the third bidirectional energy storage converter is electrically connected with the main controller. The charging branch comprises a first DC-DC converter, the first DC-DC converter is connected with the DC bus and the charging end respectively, and the first DC-DC converter is electrically connected with the main controller. The photovoltaic power supply branch comprises a second DC-DC converter, the second DC-DC converter is connected with the DC bus and the photovoltaic power generation end respectively, and the second DC-DC converter is electrically connected with the main controller.

[0027] The device further comprises a load branch, the load branch comprises an STS static transfer switch, the input end of the STS static transfer switch is connected in parallel between the first bidirectional energy storage converter and the grid connection end, the output end is connected with the load end, and the STS static transfer switch is electrically connected with the main controller. Through the load branch, the corresponding power supply can be selected for output to supply power to the load end, and through the STS static transfer switch, seamless switching between the commercial power provided by the grid and other power supplies can be realized to ensure the stability and reliability of the system, that is, the commercial power input by the grid connection end can be selected through the STS static transfer switch to supply power to the load end, or the commercial power after inverting and transforming by the first bidirectional energy storage converter can be selected to supply power to the load end.

[0028] Or, as Figure 2As shown, the diesel power supply branch, the wind power supply branch and the mains branch adopt the same bidirectional energy storage converter (PCS), that is, one end of the bidirectional energy storage converter is connected to the bus, and the other end is connected to the grid connection end, the diesel power supply access end and the wind power supply access end in parallel, and the grid connection end, the diesel power supply access end and the wind power supply access end are respectively provided with an electric switch, and one of them can be selected to be closed during operation. At the same time, the STS static transfer switch of the load branch is connected in parallel between the bidirectional energy storage converter and each power supply end, so as to switch the corresponding alternating current power supply to supply power to the load end. The bidirectional energy storage converter (PCS) is divided into single-phase machines and three-phase machines. The single-phase PCS is usually composed of a bidirectional DC-DC step-up and step-down device and a DC / AC AC-DC conversion device. The three-phase machine is divided into two types. The small-power three-phase PCS is composed of a bidirectional DC-DC step-up and step-down device and a DC / AC AC-DC conversion two-stage device. The large-power three-phase PCS is composed of a DC / AC AC-DC conversion one-stage device. The embodiment adopts a small-power three-phase PCS.

[0029] Further, the charging end includes a charging gun, the photovoltaic power generation end includes a photovoltaic panel array, and the energy storage module includes an energy storage battery. The main controller can adopt a corresponding processor or monitoring host to control the working of the bidirectional energy storage converter, the DC-DC converter, the STS static transfer switch and the energy storage module in the device. The main controller is connected to the bidirectional energy storage converter, the DC-DC converter, the STS static transfer switch and the energy storage module in the device through a corresponding communication bus (such as an RS485 bus).

[0030] For example, during the actual application of the device, the energy storage charging can be divided into the grid-connected storage charging mode, the off-grid wind-light-diesel-storage charging mode and the grid-connected wind-light-diesel-storage charging mode.

[0031] 1. Grid-connected storage charging mode: In the case that the device only accesses the mains of the power grid and does not access the photovoltaic power generation, the wind power generation and the diesel power generation, the device can charge the energy storage battery at a small power during the electricity valley period and output a large power to charge the charging pile. For the charging station with relatively strong electricity demand, when the electricity stored during the electricity valley period is insufficient to support the electricity discharge demand, the energy storage battery can also be forced to charge during other electricity time periods (such as when the actual electricity of the energy storage battery is lower than a set value, the energy storage battery is forced to charge).

[0032] 2. Off-grid wind-light-diesel-storage charging mode: In the case that the device does not access the mains and only accesses the photovoltaic power generation, the wind power generation or the diesel power generation, the threshold SOC1 of the energy storage battery can be set. When the actual electricity of the energy storage battery is lower than SOC1, the energy storage battery is charged by the photovoltaic power generation or the wind power generation. If the natural conditions are limited, such as no wind or no light, and there is electricity demand, the energy storage battery can be charged by the diesel power generation.

[0033] 3. Grid-connected wind-solar-diesel-storage charging mode: the device accesses the power grid and simultaneously accesses photovoltaic power generation, wind power generation or diesel power generation, and an electric quantity threshold SOC1 (photovoltaic and wind charging threshold) and an electric quantity threshold SOC2 (mains charging threshold) can be set, SOC1>SOC2; when the actual electric quantity SOC of the energy storage battery is lower than SOC1, the energy storage battery is charged by photovoltaic power generation or wind power generation; when the actual electric quantity SOC of the energy storage battery is lower than SOC2, the energy storage battery is charged by the mains. When the energy storage battery is fully charged, the excess electric quantity can also be sent back to the power grid, thereby achieving the purpose of "self-generation and self-use, and surplus electricity on the grid".

[0034] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of the present application.

Claims

1. A wind-solar-diesel-storage integrated device applicable to multiple scenarios, characterized in that, The device comprises a photovoltaic power generation end, a diesel power generation access end, a wind power generation access end, an electric energy management system and a charging end, the electric energy management system comprises a direct current bus, an energy storage module, a photovoltaic power supply branch, a diesel power supply branch, a wind power supply branch, a charging branch and a main controller, the energy storage module is electrically connected with the main controller, is used for accepting control of the main controller, accesses the bus direct current from the direct current bus to store energy, or outputs the stored electric energy to the direct current bus, the photovoltaic power supply branch is connected with the direct current bus and the photovoltaic power generation end respectively, is used for converting the photovoltaic direct current input by the photovoltaic power generation end into the bus direct current, and outputs the bus direct current to the direct current bus, the diesel power supply branch is connected with the direct current bus and the diesel power generation access end respectively, is used for converting the diesel alternating current input by the diesel power generation access end into the bus direct current, and outputs the bus direct current to the direct current bus, the wind power supply branch is connected with the direct current bus and the wind power generation access end respectively, is used for converting the wind alternating current input by the wind power generation access end into the bus direct current, and outputs the bus direct current to the direct current bus, the charging branch is connected with the direct current bus and the charging end respectively, is used for converting the bus direct current accessed from the direct current bus into charging direct current, and outputs the charging direct current to the charging end, and the main controller is used for controlling on-off of the photovoltaic power supply branch, the diesel power supply branch, the wind power supply branch and the charging branch.

2. The wind-solar-diesel-storage integrated device suitable for multiple scenarios according to claim 1, characterized in that, The device further comprises a commercial power branch, the commercial power branch is connected with the direct current bus and a power grid connection end respectively, is used for converting the commercial power input by the power grid connection end into the bus direct current, and outputs the bus direct current to the direct current bus, or converts the bus direct current input by the direct current bus into the commercial power, and outputs the commercial power to the power grid connection end. 3.The wind-solar-diesel-storage integrated device applicable to multiple scenarios according to claim 2, characterized in that, The commercial power branch comprises a first bidirectional energy storage converter, the first bidirectional energy storage converter is connected with the direct current bus and the power grid connection end respectively, and an electric switch is arranged between the first bidirectional energy storage converter and the power grid connection end, and the first bidirectional energy storage converter is electrically connected with the main controller.

4. The wind-solar-diesel-storage integrated device of claim 3, wherein, The device further comprises a load branch, the load branch comprises an STS static transfer switch, an input end of the STS static transfer switch is connected in parallel between the first bidirectional energy storage converter and the power grid connection end, an output end is connected with a load end, and the STS static transfer switch is electrically connected with the main controller.

5. The wind-solar-diesel-storage integrated device of claim 1, wherein, The wind power supply branch comprises a second bidirectional energy storage converter, the second bidirectional energy storage converter is connected with the direct current bus and the wind power generation access end respectively, and an electric switch is arranged between the second bidirectional energy storage converter and the wind power generation access end, and the second bidirectional energy storage converter is electrically connected with the main controller. 6.The wind-solar-diesel-storage integrated device applicable to multiple scenarios according to claim 1, wherein, The diesel power supply branch comprises a third bidirectional energy storage converter, the third bidirectional energy storage converter is connected with the direct current bus and the diesel power generation access end respectively, and an electric switch is arranged between the third bidirectional energy storage converter and the diesel power generation access end, and the third bidirectional energy storage converter is electrically connected with the main controller.

7. The wind-solar-diesel-storage integrated device of claim 1, wherein, The charging branch comprises a first DC-DC converter, the first DC-DC converter is connected with the DC bus and the charging end respectively, and the first DC-DC converter is electrically connected with the main controller. 8.The wind-solar-diesel-storage integrated device applicable to multiple scenarios according to claim 1, wherein, The photovoltaic power supply branch comprises a second DC-DC converter, the second DC-DC converter is connected with the DC bus and the photovoltaic power generation end respectively, and the second DC-DC converter is electrically connected with the main controller. 9.The wind-solar-diesel-storage integrated device of claim 1, wherein, The charging end comprises a charging gun. 10.The wind-solar-diesel-storage integrated device of claim 1, wherein, The photovoltaic power generation end comprises a photovoltaic panel array, and the energy storage module comprises an energy storage battery.

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