A wind-solar-diesel storage integrated energy supply system

Abstract

The present application relates to a kind of wind and light diesel integration energy supply system, comprising: several different kinds of power supply unit, load unit and with each power supply unit electric connection energy management control unit, wherein: each power supply unit is the independent shelter structure of free detachable movement, each power supply unit includes the interface of unified direction external power supply and grid-connected, external power supply and grid-connected interface are used for grid-connected online power supply;Energy management control unit is used to adjust the each power supply unit, to determine the working mode of energy supply system, and working mode includes power supply unit independent power supply mode or multiple power supply unit grid-connected online power supply mode.The present application can independently output electric energy, also can fast seamless grid-connected mode switching operation, since being equipped with energy management system, power fluctuation caused by wind power, photoelectricity and load end change can be adjusted faster, can satisfy the demand of long time, high efficiency, long-term stable operation power supply in plateau or island isolated environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply and energy security, and particularly relates to a wind-solar-diesel-storage integrated energy power supply system. BACKGROUND

[0002] Under the new situation, with the continuous improvement of urbanization and industrialization level in China, the demand for electric energy is also expanding. However, due to the unevenness of the terrain and energy distribution in China, such as remote mountainous areas, plateaus, islands and other special locations, the power supply demand in these locations cannot be guaranteed due to the long distance from the power plant, high transmission cost, long construction period of power station, and many power supply failures. Once a failure occurs, it may cause a long power outage, which has a major impact on local work and economy.

[0003] The existing power supply system does not have strong mobility and flexibility, and is not suitable for power demand in special terrain. For example, the Chinese invention patent with the application number 201810387324.3, named wind-solar-diesel-storage intelligent alternating current micro-grid system, its invention content mainly relies on the construction of micro-grid system by power generation system, and the invention content mainly focuses on the power balance between power supply and load, and is biased towards theoretical control. Moreover, the application scene is mainly used with grid connection, which does not have strong mobility, and the application scene is too single, which is different from the content of the present application. The Chinese invention patent with the application number 201110093961.8, named a wind-solar-diesel-storage isolated micro-grid system and its control method, its invention content is a coordinated operation control method of micro-grid system, which regulates and controls each distributed power supply and load in the micro-grid by inputting and switching renewable energy. The content and purpose of the present application are different from those of the present application. The Chinese invention patent with the application number 202211441571.X, named a wind-solar-diesel-storage integrated power supply system and method, its invention content is to provide a power supply system that can respond to instantaneous high-power load fluctuations and has unlimited use time. The control method is introduced in detail for this purpose, and the content and purpose of the present application are different from those of the present application.

[0004] At present, the existing power supply system is mostly combined with the city power to form a small micro-grid system. Due to the use demand, this type of power supply system is mostly fixed energy power station, which does not have strong mobility and flexibility, and is complex to deploy and retract, and is not suitable for some application scenarios with strong mobility. SUMMARY

[0005] Therefore, it is necessary to provide a wind-solar-diesel-storage integrated energy power supply system to solve the problems of poor mobility and flexibility in special application fields and scenes, and power supply difficulties in remote mountainous areas, plateaus, islands and other special locations.

[0006] In order to achieve the above object, the present application provides a wind-solar-diesel integrated energy supply system, comprising:

[0007] a plurality of different types of power supply units, load units, and energy management control units electrically connected to each power supply unit, wherein:

[0008] Each power supply unit is a free-dismountable and movable independent shelter structure, each power supply unit contains a unified direction external power supply and grid-connected interface, which is used for grid-connected power supply;

[0009] The energy management control unit is used to adjust the power supply units to determine the working mode of the energy supply system, which includes power supply unit independent power supply mode or multiple power supply unit grid-connected power supply mode.

[0010] Preferably, the plurality of different types of power supply units include:

[0011] wind power system unit, photovoltaic system unit, energy storage system unit, and diesel generator system unit;

[0012] The wind power system unit is used for power supply by wind energy; the photovoltaic system unit is used for power supply by light energy; the energy storage system unit is used for power supply by its own stored energy; and the diesel generator system unit is used for power supply by burning diesel.

[0013] Preferably, the wind power system unit includes a wind wheel, a gear speed-up box, a generator, a double-fed AC converter, a filter, a control unit, and a converter;

[0014] The control unit is connected to the wind wheel, the gear speed-up box, the generator, the double-fed AC converter, the filter, and the converter, respectively, and the wind wheel is connected to the gear speed-up box, the generator, the filter, the double-fed AC converter, and the converter in sequence;

[0015] The wind wheel is used for high-speed rotation under wind force to drive the gear speed-up box to conduct wind energy to the generator and the double-fed AC converter;

[0016] The gear speed-up box is used for driving the generator to generate electricity by accelerating the rotation of the rotor shaft;

[0017] The generator is used for converting wind energy into mechanical energy by using the generator rotor;

[0018] The double-fed AC converter is used for converting mechanical energy generated by the generator rotor into electrical energy by the double converter;

[0019] The filter is used for eliminating harmonics generated in the process of electricity generation;

[0020] The control unit is used to control the speed of the gear box and the wind wheel according to the load demand of the rear end;

[0021] The converter is used to keep the output current stable.

[0022] Preferably, the photoelectric system unit comprises a bus box, a direct current cabinet, a DC / DC, a temperature sensor, a detector, a radiator, an energy storage unit, a DC / AC and a voltage boosting unit;

[0023] The bus box is connected to the direct current cabinet, the DC / DC and the detector in sequence, the output end of the detector is connected to the DC / AC, the temperature sensor and the energy storage unit, the output end of the DC / AC is connected to the voltage boosting unit, and the output end of the temperature sensor is connected to the radiator;

[0024] The bus box is used to converge light;

[0025] The direct current cabinet is used to convert light into direct current power;

[0026] The DC / DC is used to adjust the direct current voltage;

[0027] The temperature sensor is used to measure temperature;

[0028] The detector is used to detect whether the temperature reaches a preset value and feedback;

[0029] The radiator is used to dissipate heat for the photovoltaic module;

[0030] The energy storage unit is used to store excess energy;

[0031] The DC / AC is used to convert direct current into alternating current;

[0032] The voltage boosting unit is used to increase alternating current voltage.

[0033] Preferably, the energy storage system unit comprises a battery pack, a BMS direct current control cabinet, a control monitoring unit and a DC / AC converter,

[0034] The battery pack is connected to the BMS direct current control cabinet, the control monitoring unit and the DC / AC converter in sequence;

[0035] The battery pack is used to output direct current;

[0036] The BMS direct current control cabinet is used to process data for the entire energy storage system unit;

[0037] The control monitoring unit is used to monitor information for the entire energy storage system unit, issue instructions, and uniformly exchange and protect energy according to the remaining SOC.

[0038] The DC / AC converter is used to convert direct current into alternating current for use by the load.

[0039] Preferably, the diesel power generation system unit is used to select diesel fuel injection into the diesel generator set according to the temperature environment requirements, convert internal energy into mechanical energy through fuel combustion to drive the direct current generator to operate to generate direct current, and then output alternating current to the load through the DC / AC converter.

[0040] Preferably, the working mode further comprises:

[0041] The emergency power supply mode is triggered when there is no external power supply, the energy storage system unit and the diesel power generation system unit operate in parallel to carry the load, the diesel generator is in manual control mode, the load of the energy storage system unit and the diesel power generation system unit is equally divided, and the battery power is used up, and the diesel power generation system unit is used up, and the load is supplied with power for a short time.

[0042] Preferably, the working mode further comprises:

[0043] The access to the power supply mode, in the case of power supply, the power supply accesses the energy storage system unit, the wind power system unit and the photovoltaic system unit, and charges the battery or heats the battery core in the energy storage system unit, the wind power system unit and the photovoltaic system unit through the power supply. In the power supply mode, the energy storage system unit charges according to the set charging power, and stops charging when the SOC is equal to the set threshold.

[0044] Preferably, the working mode further comprises:

[0045] The battery maintenance mode, in the case of power supply, the power supply accesses the energy storage system unit, the wind power system unit and the photovoltaic system unit, and discharges and fills the battery in the energy storage system unit, the wind power system unit and the photovoltaic system unit through the power supply, for checking the battery capacity.

[0046] Preferably, when in the grid-connected online power supply mode, when the energy supply system cannot meet the high-power use demand of the load, the energy supply system switches the intelligent power supply priority according to the remaining SOC energy, and when the preset threshold is higher than the remaining SOC energy value, the energy supply system cuts off unnecessary power supply to ensure important load power supply.

[0047] The beneficial effects of the above embodiment are that the wind-solar-diesel-storage integrated energy power supply system provided by the embodiment of the present application comprises a plurality of different types of power supply units, load units and an energy management control unit for controlling and managing the power supply units, each power supply unit is an independent shelter structure, each independent shelter structure is freely detachable and movable, the external power supply and grid-connected interface is in a unified direction, the energy power supply system comprises a plurality of working modes, mainly including a unit independent power supply mode and a grid-connected online power supply mode, and the energy management control unit sends a control instruction to confirm the working mode adopted by the current working state. The present application can solve the problem of unified power supply in remote mountainous areas, plateaus or island regions, solve the problem of electricity demand in isolated environments, and the device has strong mobility and flexibility, can be adjusted and moved according to the terrain and environment, and increases the diversity of electricity demand. The present application can not only independently output electric energy, but also can quickly and seamlessly switch to grid-connected mode for operation, since the energy management system is provided, the power fluctuation caused by the changes of wind power, solar power and load end can be quickly adjusted, and the demand for long-time, high-efficiency, long-term stable operation of power supply in plateau or island isolated environment can be met. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 The structure schematic diagram of a wind-solar-diesel-storage integrated energy power supply system provided by the present application is shown in the figure.

[0049] Figure 2 The structure schematic diagram of a wind power unit provided by the present application is shown in the figure.

[0050] Figure 3 The structure schematic diagram of a solar power system unit provided by the present application is shown in the figure.

[0051] Figure 4 The structure schematic diagram of a storage system unit provided by the present application is shown in the figure.

[0052] 1, photovoltaic unit; 2, detection unit 1; 3, air switch 1; 4, DC / DC converter; 5, energy storage unit; 6, detection unit 2; 7, air switch 2; 8, diesel generator unit; 9, detection unit 3; 10, air switch 3; 11, wind power unit; 12, detection unit 4; 13, air switch 4; 14, mains; 15, detection unit 5; 16, air switch 5; 17, DC / AC converter; 18, energy management system; 19, AC bus; 20, load unit; 21, transformer; 22, power distribution network; 23, contactor; 24, busbar box; 25, DC cabinet; 26, detector; 27, access switch; 28, radiator; 29, voltage boosting unit; 30, temperature sensor; 31, wind wheel; 32, gear speed-up box body; 33, generator; 34, relay; 35, double-fed AC machine; 36, fuse; 37, control unit; 38, filter; 39, battery pack; 40, BMS DC control cabinet; 41, control and monitoring unit. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present application will be described in detail below with reference to the drawings, which form a part of this application. The drawings and the associated descriptions are intended to convey principles of the present application, and are not intended to limit its scope.

[0054] At present, the existing power supply system is mostly combined with the mains to form a small micro-grid system. Due to the use demand, the power supply system is mostly a fixed energy power station, which does not have strong mobility and flexibility, and is complex to deploy and retract, and is not suitable for some application scenarios with strong mobility.

[0055] Therefore, the embodiment of the present application provides a wind-solar-diesel-storage integrated energy power supply system, which fully utilizes the surrounding wind energy and light energy, outputs a certain power through an energy management platform to meet the load demand, and can rely on a diesel generator set or an energy storage system to output externally even in the absence of wind energy and light energy, so as to meet the demand for electric energy output in various field work. In addition, since each unit system is a single independent shelter structure, it has strong mobility and flexibility, and can provide stable and reliable power supply demand for fields such as earthquake relief, flood rescue, emergency rescue, and field combat of troops. The following will be described and introduced through multiple embodiments.

[0056] Figure 1 A structure schematic diagram of one embodiment of the wind-solar-diesel-storage integrated energy power supply system provided by the present application is shown in FIG. 1. Figure 1 As shown in FIG. 1, the wind-solar-diesel-storage integrated energy power supply system comprises:

[0057] a plurality of different types of power supply units, load units, and energy management control units electrically connected with each power supply unit, wherein:

[0058] Each power supply unit is a free detachable and movable independent shelter structure, each of the power supply units comprises a unified direction external power supply and grid-connected interface, and the external power supply and grid-connected interface is used for grid-connected and online power supply.

[0059] The energy management control unit is used for adjusting the power supply units to determine the working mode of the energy supply system, and the working mode comprises a power supply unit independent power supply mode or a plurality of power supply unit grid-connected and online power supply mode.

[0060] That is, each power supply unit can be independently moved, and the external power supply and grid-connected interface is in a unified direction, facilitating grid-connected and online use between the independent shelter structures, and the whole energy supply system can be transported on a vehicle, thereby guaranteeing the mobility and flexibility of the whole energy supply system, and solving the problem of long-time power demand in fields such as earthquake relief, flood fighting and rescue, emergency rescue and field operation of troops.

[0061] As an optional implementation manner, referring to Figure 1 , the plurality of different kinds of power supply units comprise:

[0062] a wind power system unit 11 (a wind power unit in Figure 1 ), a photoelectric system unit (a photovoltaic unit in Figure 1 ), an energy storage system unit (an energy storage unit in Figure 1 ) and a diesel power generation system unit (a diesel power generation unit in Figure 1 ); the abbreviations in the brackets are the abbreviations in the drawings, which are equivalent to the description in the present application and will not be repeatedly described hereinafter.

[0063] The wind power system unit is used for power supply by using wind energy, the photoelectric system unit is used for power supply by using light energy, the energy storage system unit is used for power supply by using the energy stored by itself, and the diesel power generation system unit is used for power supply by using diesel combustion.

[0064] In an environment with wind energy and light energy, the wind power system unit 11 and the photoelectric system unit 1 are used for power supply, and in the case without wind energy and light energy, the energy storage system unit 5 and the diesel power generation system 8 unit are used for external energy output.

[0065] Specifically, in combination with Figure 1 The present application provides a wind-solar-diesel-storage integrated energy supply system, which comprises a wind power system unit 11, a photoelectric system unit 1, an energy storage system unit 5, a diesel power generation system unit 8, a load unit 20 and an energy management control unit 18 (an energy management system in Figure 1 ), the wind power system unit 11 is a movable power generation device supported by an independent shelter, under the action of a wind turbine and a gear box and the like, AC power is connected to a bus or converted into DC power through a DC / DC converter and then stored in the energy storage unit, Figure 1The simple schematic diagram is that the wind power unit 11 is transmitted to the DC / AC 17 through the fourth detection unit 12 and the fourth air switch 13; the photovoltaic system unit 1 is a foldable photovoltaic module, direct current is converted into alternating current through DC / AC after a plurality of solar photovoltaic panels are connected in series and parallel, and then the alternating current is connected to a bus, or direct current is converted through DC / DC and then stored in the energy storage unit, Figure 1 The simple schematic diagram is that the photovoltaic unit 1 is transmitted to the DC / AC 17 through the first detection unit 2 and the first air switch 3 and conversion through the DC / DC 4; the energy storage system unit 5 comprises a BMS management system, an energy storage dual-phase converter, an energy management system and a heat dissipation system, and the energy storage system unit 5 can be independently operated in an off-grid mode or used in a grid-connected mode, Figure 1 The simple schematic diagram is that the energy storage unit 5 is transmitted to the DC / AC 17 through the second detection unit 6 and the second air switch 7; the diesel power generation system unit 8 comprises an ignition system, a regulator, a generator, a filling unit, an exhaust unit, a reaction unit and a storage battery, and the diesel power generation system unit 8 can be used for direct power supply, charging of the energy storage system unit 5 or grid-connected power supply, Figure 1 The simple schematic diagram is that the diesel unit 8 is transmitted to the DC / AC 17 through the third detection unit 9 and the third air switch 10, and the other way of the municipal power 14 is transmitted to the DC / AC 17 through the fifth detection unit 15 and the fifth air switch 16, and the two ways are transmitted to the load 20 through the energy management 18 and the alternating current bus 19 or the transformer 21 and the distribution room 22.

[0066] As can be seen from the above, each power supply unit provided by the application can be independently used to complete power supply work, or can be used in a grid-connected mode. For grid-connected power supply, the grid-connected power supply modes include: a grid-connected complementary power supply mode of the wind power system unit 11 and the photovoltaic system unit 1, a grid-connected power supply mode of the energy storage system unit 5 and the diesel power generation system unit 8, and a grid-connected power supply mode of the photovoltaic system unit 1 and the energy storage system unit 5.

[0067] The following will describe how to supply power in a grid-connected mode with specific examples:

[0068] When the on-site wind power and light are sufficient, the energy management system 18 starts the grid-connected complementary power supply mode of the wind power system unit 11 and the photovoltaic system unit 1. The wind power system unit 11 and the photovoltaic system unit 1 are connected to each other, the photovoltaic system unit 11 controls the wind power system unit 11, alternating current is output through the DC / AC 17 converter, and the alternating current is used for power supply.

[0069] When the on-site wind power and light are insufficient, and the energy storage system unit 5 cannot meet the power demand of the load, the energy management system 18 starts the grid-connected complementary power supply mode of the energy storage system unit 5 and the diesel power generation system unit 8. After the energy storage system unit 5 and the diesel power generation system unit 8 are connected in communication, the AC output power of the diesel power generation system unit 8 is controlled by the energy storage system unit 5. The energy storage system unit 5 receives the power demand of the load, issues a control instruction, and adjusts the energy of the diesel power generation system unit 8 according to the power demand. If the power demand of the load is too large, the two units are unified to output externally. If the power demand of the load is less than the power output by the diesel power generation system unit 8, the excess energy is used to charge the energy storage system unit 5, so as to realize dynamic energy balance.

[0070] When the on-site wind power is insufficient but the light is sufficient, and the photovoltaic system unit 1 cannot meet the power demand of the load under full-power operation, the energy management system 18 starts the grid-connected complementary power supply mode of the photovoltaic system unit 1 and the energy storage system unit 5. After the energy storage system unit 5 and the photovoltaic system unit 1 are connected in communication, the AC output power of the photovoltaic system unit 1 is controlled by the energy storage system unit 5. The energy storage system unit 5 receives the power demand of the load, issues a control instruction, and adjusts the energy of the photovoltaic system unit 1 according to the power demand. Since the power demand of the load is too large, the two units need to be unified to output externally under the control of the energy storage system unit.

[0071] The wind-solar-diesel integrated energy supply system provided by the application can solve the problem of unified power supply in remote mountainous areas, plateaus or island regions, solve the problem of power demand in isolated environments, and has strong mobility and flexibility. The device can be adjusted and moved according to the terrain and environment, and the diversity of power demand is increased. The application can independently output electrical energy, and can also run in a seamless grid-connected mode. Since the energy management system is provided, the power fluctuation caused by changes in wind power, light power and load end can be quickly adjusted, so that the demand for long-time, high-efficiency and long-term stable operation of power supply in isolated environments such as plateaus or islands can be met.

[0072] Figure 2 The wind power unit structure diagram provided by the embodiment of the application is shown in Figure 2 When the on-site wind power is sufficient and the light is insufficient, the energy management system starts the independent power supply mode of the wind power unit through a control program.

[0073] The wind power system unit 11 comprises a wind wheel 31, a gear speed-up box 32, a generator 33, a double-fed AC converter 35, a double converter 36, and a control unit 37. Figure 2relay 34, fuse 36, filter 38, control unit 37, converter 21, the control unit 37 is connected with the wind wheel 31, gear box 32, generator 33, double-fed inverter 35, filter 38 and converter 21 respectively, the wind wheel 31 is connected with the gear box 32, generator 33, filter 38, double-fed inverter 35 and converter 21 in turn;

[0074] The wind wheel 31 is used to rotate at high speed under the wind force to drive the gear box 32 to conduct the wind energy to the generator 33 and double-fed inverter 35.

[0075] The gear box 32 is used to drive the generator to generate electricity by accelerating the rotation of the rotor shaft.

[0076] The generator 33 is used to convert the wind energy into mechanical energy by using the rotor of the generator 33.

[0077] The double-fed inverter 35 is used to convert the mechanical energy generated by the rotor of the generator 33 into electrical energy by using the double converter.

[0078] The filter 38 is used to eliminate the harmonics generated in the process of generating electricity.

[0079] The control unit 37 is used to control the fast and slow frequencies of the gear box 32 and wind wheel 31 according to the demand of the rear-end load.

[0080] The converter 21 is used to keep the output current stable.

[0081] The wind wheel 31 rotates at high speed under the wind force to drive the gear box 32 to conduct the wind energy to the generator 33 and double-fed inverter 35, the double-fed inverter 35 converts the mechanical energy generated by the rotor of the generator 33 into electrical energy by using the double converter, the filter 38 eliminates the harmonics generated in the process of generating electricity, the control unit controls the fast and slow frequencies of the gear box 32 and wind wheel 31 according to the demand of the rear-end load, and the converter 21 keeps the output current stable. Figure 2 The wind wheel 31 rotates at high speed under the wind force to drive the gear box 32 to conduct the wind energy to the generator 33 and double-fed inverter 35, the double-fed inverter 35 converts the mechanical energy generated by the rotor of the generator 33 into electrical energy by using the double converter, the filter 38 eliminates the harmonics generated in the process of generating electricity, the control unit controls the fast and slow frequencies of the gear box 32 and wind wheel 31 according to the demand of the rear-end load, and the converter 21 keeps the output current stable.

[0082] Figure 3 The photovoltaic system unit 1 is shown in the structure schematic diagram of the photovoltaic system unit 1 provided by the embodiment of the present application. Figure 3 When there is no wind power generation facility at the construction site and the light is sufficient, the energy management system starts the photovoltaic system unit 1 in the independent power supply mode through the control program.

[0083] The photovoltaic system unit 1 includes a bus box 24, a direct current cabinet 25, a DC / DC 4, a temperature sensor 30, a detector 26, a radiator 28, a photovoltaic module, an energy storage unit, a DC / AC 17, a voltage boosting unit 29.

[0084] The confluence box 24 is connected with the direct current cabinet 25, the DC / DC 4 and the detector 26 in sequence, the output end of the detector 26 is connected with the DC / AC 17, the temperature sensor 30 and the energy storage unit respectively, the output end of the DC / AC 17 is connected with the voltage boosting unit 29, and the output end of the temperature sensor 30 is connected with the radiator 28;

[0085] The confluence box 24 is used for converging light;

[0086] The direct current cabinet 25 is used for converting light into direct current power supply;

[0087] The DC / DC 4 is used for adjusting direct current voltage;

[0088] The temperature sensor 30 is used for measuring temperature;

[0089] The detector 26 is used for detecting whether the temperature reaches a preset value and feeding back;

[0090] The radiator 28 is used for radiating photovoltaic components;

[0091] The energy storage unit is used for storing excess energy;

[0092] The DC / AC 17 is used for converting direct current into alternating current;

[0093] The voltage boosting unit 29 is used for increasing alternating current voltage.

[0094] Wherein, the direct current power supply generated by light passes through the switch 23, is converged by the confluence box 24 and enters the direct current cabinet 25, the voltage passing through the direct current cabinet 25 is regulated by the DC / DC 4, is converted into power required by a load, when the temperature sensor 30 reaches a preset value in the running process, the detector 26 obtains feedback, the radiator 28 is started to radiate photovoltaic components, the excess energy generated by the photovoltaic components opens the passage switch 27 to charge the energy storage unit 5, and the energy generated by another path is converted into alternating current after passing through the DC / AC 17, is connected with the alternating current bus through the voltage boosting unit 29 and is used for the load 20.

[0095] Figure 4 The energy storage system unit structure schematic diagram provided by the embodiment of the application is shown as Figure 4 When the wind power system unit 11 and the photovoltaic system unit 1 cannot be used, the energy management system 5 starts the energy storage system unit 5 independent power supply mode through a control program.

[0096] The energy storage system unit 5 comprises a battery pack 39, a BMS DC control cabinet 40, a control monitoring unit 41, and a DC / AC converter 17, wherein the battery pack 39 is connected to the BMS DC control cabinet 40, the control monitoring unit 41, and the DC / AC converter 17 in sequence.

[0097] The battery pack 39 is used for outputting direct current.

[0098] The BMS DC control cabinet 40 is used for data processing of the entire energy storage system unit.

[0099] The control monitoring unit 41 is used for information monitoring and issuing instructions of the entire energy storage system unit, and unified energy exchange and protection according to the remaining SOC.

[0100] The DC / AC converter 17 is used for converting direct current into alternating current for load use.

[0101] The energy storage system unit 5 outputs direct current through the battery pack 39, performs data processing of the entire energy storage system unit 5 through the BMS DC control cabinet 40, performs information monitoring and issuing instructions of the system through the control monitoring unit 41, and performs unified energy exchange and protection according to the remaining SOC of the monitoring unit 41. The direct current passing through the BMS DC control cabinet 40 can be used by the load 20 or connected to the alternating current bus 19 through grid connection.

[0102] On the basis of the above embodiment, as an optional implementation, when the wind power system unit 11 and the photovoltaic system unit 1 cannot be used and the remaining SOC of the energy storage system unit 5 is insufficient, the energy management system 18 starts the diesel generator system 8 in the independent power supply mode through the control program.

[0103] The diesel generator system unit 8 is used for selecting diesel refueling into the diesel generator set according to the temperature environment requirement for use, converting internal energy into mechanical energy through fuel combustion to drive the direct current generator to operate and generate direct current, and then outputting alternating current to the load through the DC / AC converter.

[0104] On the basis of the above embodiment, as an optional implementation, the working mode of the wind-solar-diesel-storage integrated energy supply system further comprises:

[0105] The emergency power supply mode is triggered when there is no external power supply 14, the energy storage system unit 5 and the diesel generator system unit 8 operate in parallel to carry the load, the diesel generator is in manual control mode, the load is equally divided between the energy storage system unit 5 and the diesel generator system unit 8, and the load is maintained for a short time until the battery power is used up and the diesel generator system unit 8 is out of fuel.

[0106] On the basis of the above-mentioned embodiments, as an optional implementation, the working mode of the wind-solar-diesel-storage integrated energy power supply system further includes:

[0107] The access to the power supply mode, in the case of access to the power supply 14, the power supply access to the energy storage system unit 5, the wind power system unit 11 and the photovoltaic system unit 1, through the power supply to the battery in the energy storage system unit 5, the wind power system unit 11 and the photovoltaic system unit 1 charging or heating the battery, in the power supply mode, the energy storage system unit 5 charges according to the set charging power until the SOC is equal to the set threshold value and stops charging.

[0108] On the basis of the above-mentioned embodiments, as an optional implementation, the working mode of the wind-solar-diesel-storage integrated energy power supply system further includes:

[0109] The battery maintenance mode, in the case of access to the power supply, the power supply 14 accesses the energy storage system unit 5, the wind power system unit 11 and the photovoltaic system unit 1, and the power supply 14 is used to empty and fill the battery in the energy storage system unit 5, the wind power system unit 11 and the photovoltaic system unit 1, for checking the battery capacity.

[0110] Specifically, the battery maintenance mode of the power supply system is that in the case of access to the power supply, the power supply 14 accesses the energy storage system unit 5, the wind power system unit 11 and the photovoltaic system unit 1, and the power supply is used to empty and fill the battery in the energy storage system unit 5, the wind power system unit 11 and the photovoltaic system unit 1, for checking the battery capacity; in this mode, the battery is first emptied, and then filled after 30 minutes of standing, and then the battery capacity is put to 80% after 30 minutes of standing.

[0111] It can be understood that the scheme provided by the application has the function of battery maintenance mode, in the case of access to the power supply in the power supply system, the battery in the energy storage system, the wind power system and the photovoltaic system is emptied and filled, for checking the battery capacity, reducing the energy management system failure, and ensuring the stability and accuracy of the power demand.

[0112] On the basis of the above-mentioned embodiments, as a preferred implementation, when the wind-solar-diesel-storage integrated energy power supply system is in the grid-connected online power supply mode, when the energy power supply system cannot meet the high-power use demand of the load, the energy power supply system switches the intelligent power supply priority according to the remaining SOC energy, when the preset threshold is higher than the remaining SOC energy value, the energy power supply system cuts off the unnecessary power supply, and ensures the power supply of important load.

[0113] It should be noted that, as used in this document, the terms "comprises", "comprising", or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0114] While the application has been described by way of example and in terms of the preferred embodiment, it is to be understood that the application is not limited to the disclosed embodiment or combination of parts, and that changes or modifications can be practiced in various embodiments of the application for adapting it to various working environments and embodiments without departing from the spirit of the application.

Claims

1. A wind-solar-diesel hybrid energy supply system, characterized in that, The utility model relates to an energy supply system, and specifically relates to an energy supply system comprising: a plurality of different kinds of power supply units, load units and energy management control units electrically connected with each power supply unit, wherein: each power supply unit is a free-dismountable and movable independent shelter structure, and each power supply unit comprises a unified direction external power supply and grid-connected interface, which is used for grid-connected online power supply; the energy management control unit is used for adjusting each power supply unit to determine the working mode of the energy supply system, and the working mode comprises a power supply unit independent power supply mode or a plurality of power supply unit grid-connected online power supply mode; the working mode comprises: an emergency power supply mode, which is triggered in the working condition without external mains access, and the energy storage system unit and the diesel generator system unit are operated in parallel to carry load, the diesel generator is in a manual control mode, the load of the energy storage system unit and the diesel generator system unit is equally divided, until the battery power is used up, and the diesel generator system unit oil is consumed, and the load power supply is maintained for a short time; an access mains mode, in which the mains access energy storage system unit, wind power system unit and photovoltaic system unit are charged by the mains or the battery is heated, the energy storage system unit is charged according to the set charging power in the mains mode, and the charging is stopped until the SOC is equal to the set threshold value; a battery maintenance mode, in which the mains access energy storage system unit, wind power system unit and photovoltaic system unit are emptied and filled by the mains, and the battery capacity is calibrated.

2. The wind-solar-diesel hybrid energy supply system of claim 1, wherein, the plurality of different kinds of power supply units comprise: a wind power system unit, a photovoltaic system unit, an energy storage system unit and a diesel generator system unit; the wind power system unit is used for supplying power by using wind energy, the photovoltaic system unit is used for supplying power by using light energy, the energy storage system unit is used for supplying power by using its own stored energy, and the diesel generator system unit is used for supplying power by using diesel combustion.

3. The wind-solar-diesel hybrid energy supply system of claim 2, wherein, the wind power system unit comprises a wind wheel, a gear speed-up box, a generator, a double-fed AC converter, a filter, a control unit and a converter; the control unit is connected with the wind wheel, the gear speed-up box, the generator, the double-fed AC converter, the filter and the converter respectively, and the wind wheel is connected with the gear speed-up box, the generator, the filter, the double-fed AC converter and the converter in sequence; wherein the wind wheel is used for high-speed rotation under wind force to drive the gear speed-up box to conduct wind energy to the generator and the double-fed AC converter; the gear speed-up box is used for driving the generator to generate electricity by accelerating the rotation of the rotor shaft; the generator is used for converting wind energy into mechanical energy by using the generator rotor; the double-fed AC converter is used for converting the mechanical energy generated by the generator rotor into electrical energy by using the double converter; the filter is used for eliminating the harmonics generated in the power generation process; and the control unit is used for controlling the speed of the gear speed-up box and the wind wheel according to the load demand of the back end. The converter is used for keeping the output current stable.

4. The wind-solar-diesel hybrid energy supply system of claim 2, wherein, The photoelectric system unit comprises a busbar box, a direct current cabinet, a DC / DC, a temperature sensor, a detector, a radiator, an energy storage unit, a DC / AC and a voltage boosting unit; The busbar box is connected with the direct current cabinet, the DC / DC and the detector in sequence, the output ends of the detector are connected with the DC / AC, the temperature sensor and the energy storage unit respectively, the output end of the DC / AC is connected with the voltage boosting unit, and the output end of the temperature sensor is connected with the radiator; The busbar box is used for converging light; The direct current cabinet is used for converting light into direct current power; The DC / DC is used for adjusting direct current voltage; The temperature sensor is used for measuring temperature; The detector is used for detecting whether the temperature reaches a preset value and feeding back; The radiator is used for radiating photovoltaic components; The energy storage unit is used for storing excess energy; The DC / AC is used for converting direct current into alternating current; The voltage boosting unit is used for increasing alternating current voltage.

5. The wind-solar-diesel hybrid energy supply system of claim 2, wherein, The energy storage system unit comprises a battery pack, a BMS direct current control cabinet, a control monitoring unit and a DC / AC converter, The battery pack is connected with the BMS direct current control cabinet, the control monitoring unit and the DC / AC converter in sequence; The battery pack is used for outputting direct current; The BMS direct current control cabinet is used for processing data of the whole energy storage system unit; The control monitoring unit is used for monitoring information of the whole energy storage system unit, issuing instructions, and uniformly exchanging and protecting energy according to the remaining SOC amount; The DC / AC converter is used for converting direct current into alternating current for load use.

6. The wind-solar-diesel hybrid energy supply system of claim 2, wherein, The diesel generator system unit is used for selecting diesel oil to be filled into a diesel generator set according to the temperature environment requirement, converting internal energy into mechanical energy through fuel combustion to drive a direct current generator to operate to generate direct current, and then outputting alternating current to load use through the DC / AC converter.

7. The wind-solar-diesel hybrid energy supply system of claim 2, wherein, When in the grid-connected online power supply mode, when the energy supply system cannot meet the high-power use requirement of load, the energy supply system switches the intelligent power supply priority according to the remaining SOC energy, and when the preset threshold is higher than the remaining SOC energy value, the energy supply system cuts off unnecessary power supply to ensure important load power supply.

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