A control method, device and computer equipment for a microgrid hybrid control system

Abstract

The present invention relates to the field of microgrid intelligent technology, and discloses a control method, device and computer equipment for a microgrid hybrid control system. The present invention adds diesel generator power generation control, and by generating a first power supply control strategy under a diesel generator power supply mode, it can realize hybrid power supply of a target load by a diesel generator, a photovoltaic power generation panel and an energy storage battery when the mains power is cut off. At the same time, after the mains power is restored, it can switch to the mains power supply mode and generate a second power supply control strategy. Therefore, the present invention can ensure flexible switching between the mains power and the diesel generator, which is both safe and intelligent.

Description

Technical Field

[0001] The present invention relates to the field of microgrid intelligent technology, and in particular to a control method, device and computer equipment for a microgrid hybrid control system. Background Art

[0002] Microgrid is a system composed of micro power source, load, energy storage module and control module. The purpose of microgrid is to realize the flexible and efficient application of distributed power source and solve the problem of grid connection of large number and various forms of distributed power source. The development and extension of microgrid can fully promote the large-scale access of distributed power source and renewable energy, and realize the high reliability supply of various energy forms to load.

[0003] In the related technologies, the microgrid cannot guarantee the security and intelligence of the grid during the switching process of different energy sources, and does not support the intelligent switching of diesel power generation energy and municipal power energy. Summary of the invention

[0004] In view of this, the present invention provides a control method, device and computer equipment for a microgrid hybrid control system to solve the problem that the microgrid cannot guarantee the security and intelligence of the grid during the switching of different energy sources, and does not support the intelligent switching of diesel power generation energy and municipal power energy.

[0005] In a first aspect, the present invention provides a control method for a microgrid hybrid control system, the method comprising:

[0006] If the mains disconnection signal of the first switching switch is monitored, the current remaining power of the energy storage battery, the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, the maximum allowable power of the DCDC converter, and the active power of the energy storage converter are obtained;

[0007] If the current remaining power of the energy storage battery is less than or equal to a first preset threshold, switching from the mains power supply mode to the diesel generator power supply mode through a first switching switch;

[0008] Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated;

[0009] If a mains power recovery signal of the first switching switch is detected, the power supply mode is switched from the diesel generator to the mains power supply mode through the first switching switch;

[0010] Based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage inverter, a second power supply control strategy based on the AC power supply mode is generated.

[0011] The disclosed embodiment adds diesel generator power generation control, and by generating a first power supply control strategy in the diesel generator power supply mode, it is possible to achieve hybrid power supply of the target load by the diesel generator, photovoltaic panels, and energy storage batteries when the mains power is cut off. At the same time, after the mains power is restored, it can switch to the mains power supply mode and generate a second power supply control strategy. Therefore, the present invention can ensure flexible switching between the mains power and the diesel generator, which is both safe and intelligent.

[0012] In an optional implementation, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, including:

[0013] If the current remaining power of the energy storage battery is greater than the second preset threshold and less than or equal to the first preset threshold, the following first control process is performed:

[0014] If the current output power of the energy storage converter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel;

[0015] The excess electricity from the photovoltaic panels supplying power to the target load is used to charge the energy storage battery;

[0016] If the current output power of the energy storage converter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is less than the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel;

[0017] The energy storage battery supplies power to the target load with insufficient power from the photovoltaic panel;

[0018] If the current output power of the energy storage inverter is less than the power consumption of the target load, the current output power of the energy storage inverter is equal to the maximum allowable output power of the energy storage inverter, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel.

[0019] In the embodiment of the present disclosure, when the diesel generator is in power supply mode and the current remaining power of the energy storage battery meets The first control process is executed at the same time, that is, the first power supply strategy is generated under the diesel generator power supply mode, and when the diesel generator is cut off, the target load can be powered by the diesel generator, photovoltaic panels, and energy storage batteries in a hybrid manner, which is safe and intelligent.

[0020] In an optional implementation, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, which also includes:

[0021] If the current remaining power of the energy storage battery is less than or equal to the second preset threshold, the following second control process is performed:

[0022] If the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the current power generation power of the photovoltaic panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel;

[0023] The excess electricity from the photovoltaic panels supplying power to the target load is used to charge the energy storage battery;

[0024] If the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the current output power of the photovoltaic panel is less than the power consumption of the target load, the current output power of the energy storage converter is equal to the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel;

[0025] The excess power of the photovoltaic panels for the target load is used to charge the energy storage battery;

[0026] If the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the photovoltaic panel has no available power, the energy storage converter is controlled to standby mode, and the DCDC converter is controlled to enter shutdown mode;

[0027] If the current output power of the energy storage inverter is less than the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel.

[0028] In the embodiment of the present disclosure, when the diesel generator is in power supply mode and the current remaining power of the energy storage battery meets The second control process is executed when the diesel generator is powered on, that is, the first power supply strategy is generated in the diesel generator power supply mode, and it can be achieved when the diesel generator is cut off. When the energy storage battery is insufficient, the energy storage battery will not supply power to the target load. Instead, the target load will be supplied with a hybrid power supply through diesel generators and photovoltaic panels, which is both safe and intelligent.

[0029] In an optional implementation, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, which also includes:

[0030] If the current remaining power of the energy storage battery is less than or equal to a third preset threshold, the energy storage converter is controlled to shut down to stop supplying power to the target load through the energy storage converter, and the third preset threshold is less than the second preset threshold.

[0031] The control method of the microgrid hybrid control system in the disclosed embodiment can ensure that the photovoltaic power generation panel charges the energy storage battery alone when the energy storage battery is insufficient in the diesel generator power supply mode.

[0032] In an optional implementation, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, which also includes:

[0033] In the diesel generator power supply mode, when there is a photovoltaic power generation panel and simultaneously powers the target load, if the current remaining power of the energy storage battery increases from the first preset threshold to the fourth preset threshold, the DCDC converter is controlled to be turned off until the current remaining power of the energy storage battery is less than or equal to the fifth preset threshold, and then the DCDC converter is started.

[0034] In the disclosed embodiment, by executing the first power supply strategy of charging prohibition protection when the current remaining power SOC of the energy storage battery is continuously increased in the diesel generator power supply mode, it is possible to achieve a hybrid power supply of the target load by the diesel generator, photovoltaic panels, and energy storage batteries when the city power is cut off, thereby ultimately not only ensuring the safety of the energy storage battery but also realizing the intelligence of the power supply to the target load.

[0035] In an optional implementation, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated, including:

[0036] If the current remaining power of the energy storage battery is less than or equal to the sixth preset threshold, the following third control process is executed:

[0037] If the current power generation of the photovoltaic panel is greater than the current charging power of the energy storage battery, the energy storage battery is charged according to the active power of the energy storage converter being equal to the residual power of the photovoltaic panel, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches the preset voltage;

[0038] If the current power generation of the photovoltaic panel is equal to the current charging power of the energy storage battery, the energy storage converter is controlled to standby, and the energy storage battery is charged through the photovoltaic panel. At the same time, the energy storage battery is charged according to the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches the preset voltage;

[0039] If the current power generation of the photovoltaic panel is less than the current charging power of the energy storage battery, the energy storage battery is charged according to the current output power of the energy storage inverter being equal to the remaining charging power of the energy storage battery, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches the preset voltage;

[0040] If there is no available power from the photovoltaic panels, the energy storage battery will be charged through the mains, and at the same time, the energy storage inverter will be controlled to charge the energy storage battery at full power, and the DCDC converter will be controlled to shut down.

[0041] The control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the mains power supply mode and At the same time, a second power supply control strategy is generated to charge the energy storage battery through the photovoltaic power generation panel first, and then the energy storage battery is charged through the mains, so as to save the mains power and ensure the safety of the energy storage battery charging at the same time.

[0042] In an optional implementation, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated, which also includes:

[0043] If the current remaining power of the energy storage battery is between the sixth preset threshold and the seventh preset threshold, determining whether the energy storage battery is triggered to a charging state;

[0044] If the energy storage battery is triggered to a charging state, and the current remaining power of the energy storage battery is less than or equal to a sixth preset threshold, executing an action according to the third control process;

[0045] If the energy storage battery is not triggered to the charging state, the energy storage battery is controlled to perform an action according to the fourth control process corresponding to the seventh preset threshold, and the seventh preset threshold is the full load power of the energy storage battery.

[0046] The control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the mains power supply mode and It can judge whether the energy storage battery is triggered to be in charging state, realize flexible charging of the energy storage battery, and ensure the safety of charging of the energy storage battery.

[0047] In an optional implementation, if the current remaining power of the energy storage battery is equal to the seventh preset threshold, the following fourth control process is performed;

[0048] If the current power generation of the photovoltaic panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load, and the current output power of the DCDC converter being equal to the power consumption of the target load;

[0049] If the current power generation power of the photovoltaic panel is less than the power consumption of the target load, the target load is powered according to the condition that the current output power of the energy storage inverter is equal to the maximum allowable output power of the photovoltaic panel, and the current output power of the DCDC converter is equal to the maximum allowable output power of the photovoltaic panel. The insufficient power supply to the target load is supplied by the AC power.

[0050] The control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the mains power supply mode and When the energy storage battery is in the charging state, according to Corresponding control process

[0051] Charging the energy storage battery can ensure the safety of charging the energy storage battery.

[0052] In an optional implementation manner, the control method of the microgrid hybrid control system in the embodiment of the present disclosure further includes:

[0053] In the diesel generator power supply mode, if the current remaining power of the energy storage battery is greater than or equal to the eighth preset threshold, the first switching switch is used to switch from the diesel generator power supply mode to the dual-split mode of the diesel generator and the mains.

[0054] The control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the diesel generator power supply mode and When the diesel generator is in operation, shut down the diesel generator in time to save the power generated by the diesel generator and ensure the safety of the diesel generator power supply.

[0055] In an optional implementation manner, the control method of the microgrid hybrid control system in the embodiment of the present disclosure further includes:

[0056] If the mains disconnect signal of the first switching switch is monitored and the current remaining power of the energy storage battery is greater than the first preset threshold and less than the seventh preset threshold, the energy storage inverter is controlled to enter the off-grid mode through the second switching switch, and the current remaining power of the energy storage battery is monitored in real time. The seventh preset threshold is the full load power of the energy storage battery.

[0057] The control method of the microgrid hybrid control system in the embodiment of the present disclosure is as follows: after the power grid is cut off, At the same time, the second switch is used to safely enter the off-grid mode. At the same time, the current remaining power of the energy storage battery is monitored in real time to achieve intelligent control of the microgrid hybrid control system.

[0058] In a second aspect, the present invention provides a control device for a microgrid hybrid control system, which is used in a microgrid hybrid control system. The device comprises:

[0059] A data acquisition module is used to acquire the current remaining power of the energy storage battery, the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter if a mains disconnection signal of the first switching switch is monitored;

[0060] A first switching module, used for switching from a mains power supply mode to a diesel generator power supply mode through a first switching switch if the current remaining power of the energy storage battery is less than or equal to a first preset threshold;

[0061] A first generating module is used to generate a first power supply control strategy based on a diesel generator power supply mode based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, and the maximum allowable power of the photovoltaic panel;

[0062] The second switching module is used to switch from the diesel generator power supply mode to the mains power supply mode through the first switching switch if a mains power recovery signal of the first switching switch is detected;

[0063] The second generation module is used to generate a second power supply control strategy based on the mains power supply mode based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage inverter.

[0064] According to a third aspect, an embodiment of the present disclosure provides a microgrid hybrid control system, including:

[0065] Target load, used to generate power supply load;

[0066] Energy storage battery, used to supply power to the target load;

[0067] Photovoltaic panels for supplying power to target loads and / or energy storage batteries;

[0068] DCDC converter, used to convert the DC output voltage of the photovoltaic panel into DC;

[0069] The energy storage converter is used to convert the DC output voltage after the DC conversion by the DCDC converter into an AC output voltage;

[0070] Mains electricity, used to provide electrical energy to the target load;

[0071] A diesel generator for providing electrical energy to a target load;

[0072] The first switch is used to switch from the mains power supply mode to the diesel power generation mode, or,

[0073] Switch from energy storage converter to mains power supply mode;

[0074] A second switching switch, used to switch from an off-grid mode of the energy storage converter to a grid-connected mode, or, to switch from a grid-connected mode of the energy storage converter to an off-grid mode;

[0075] The energy storage management device establishes a communication connection with the target load, the photovoltaic power generation panel, the DCDC converter, the energy storage inverter, the AC power, the diesel generator, the first switching switch, the second switching switch, and the energy storage battery, and is used to execute the control method of the microgrid hybrid control system in the first aspect or any embodiment of the first aspect.

[0076] In a fourth aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the microgrid hybrid control method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0077] In a fifth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the microgrid hybrid control method of the first aspect or any corresponding embodiment thereof.

[0078] In a sixth aspect, the present invention provides a computer program product, comprising computer instructions, wherein the computer instructions are used to enable a computer to execute the microgrid hybrid control method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0080] Figure 1 is a schematic diagram of a microgrid hybrid control system according to an embodiment of the present invention;

[0081] Figure 2 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention;

[0082] Figure 3 is a flow chart of a control method of another microgrid hybrid control system according to an embodiment of the present invention;

[0083] Figure 4 is a flow chart of a control method of another microgrid hybrid control system according to an embodiment of the present invention;

[0084] Figure 5 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention;

[0085] Figure 6is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention;

[0086] Figure 7 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention;

[0087] Figure 8 is a structural block diagram of a control device of a microgrid hybrid control system according to an embodiment of the present invention;

[0088] Fig. 9 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0090] According to an embodiment of the present invention, an embodiment of a microgrid hybrid control system is provided, such as Figure 1 As shown, the system includes: an energy storage battery 10, a target load 11, a photovoltaic panel 12, a DCDC converter 13, an energy storage inverter 14, a mains power 15, a diesel generator 16, a first switching switch 17, a second switching switch 18, and an energy storage management device 19.

[0091] Among them, Figure 1 In the embodiment, a battery storage system (BMS) 10 is used to supply power to a target load 11 .

[0092] Among them, Figure 1 In the embodiment, the target load 11 is used to generate the power supply load. The power consumption of the target load 11 may be a target load not exceeding 100KW.

[0093] Specifically, the target load includes a first-level target load and a second-level target load, and the first-level target load is more important than the second-level target load. Therefore, the first-level target load is an important load, and the second-level target load is a secondary load. When the power grid is out of power, the secondary load is quickly disconnected to ensure that the important load continues to work, and the secondary load continues to work when the power grid is restored.

[0094] Among them, Figure 1 In the embodiment, the photovoltaic panel 12 is used to supply power to the target load 11 and / or the energy storage battery 10. Figure 1In the figure, the photovoltaic panel 12 is represented by PV, and the photovoltaic panel 12 supplies power to the target load 11, which is beneficial to saving energy.

[0095] Among them, Figure 1 In the embodiment, the DCDC converter 13 is used to convert the DC output voltage of the photovoltaic panel 12 into DC. Figure 1 In the embodiment, the DCDC converter 13 is connected to the photovoltaic panel 12 .

[0096] Among them, Figure 1 In the embodiment, the energy storage converter 14 is used to convert the DC output voltage after the DC conversion by the DCDC converter 13 into an AC output voltage. Figure 1 In FIG. 1 , the energy storage converter 14 is represented by PCS, and the energy storage converter 14 is connected to the DCDC converter 13 , and is connected to the target load 11 through a high voltage box.

[0097] Among them, Figure 1 In the figure, the mains 15 is used to provide electric energy to the target load 11. The voltage of the mains is 220V.

[0098] Among them, Figure 1 In the embodiment, the diesel generator 16 is used to provide electric energy to the target load 11. The diesel generator 16, the photovoltaic panel 12, and the city electricity 15 constitute a hybrid energy source to supply electric energy to the target load 11.

[0099] Among them, Figure 1 In the embodiment, the first switch 17 is used to switch from the mains power supply mode to the diesel power generation mode, or, to switch from the diesel power generation mode to the mains power supply mode.

[0100] Specifically, the first switch is a dual power switch, which can be represented by ATS. Figure 1 In the example, the first switch has data, that is, ATS-NA / NB / NC has voltage data; when the energy storage converter is in the diesel generator grid-connected mode, the first switch also has voltage data, that is, ATS-RA / RB / RC has data. If the mains or diesel generator has voltage data, the control process is implemented by the following microgrid hybrid control method. In this embodiment, the common power supply is the mains power supply, and the backup power supply is the diesel generator.

[0101] Among them, Figure 1 In the embodiment, the second switch 18 is used to switch from the off-grid mode of the energy storage converter 14 to the grid-connected mode, or, to switch from the grid-connected mode of the energy storage converter 14 to the off-grid mode. Figure 1In the embodiment, the first switching switch 17 is connected to the second switching switch 18 through the circuit breaker QF1, and the grid-connected or off-grid switching of the energy storage converter 14 is realized through the second switching switch 18. The second switching switch 18 is also connected to the target load 11 through the circuit breaker QF2 to realize the power supply of the target load 11 by the mains 15 or the power supply of the target load 11 by the diesel generator 16. Figure 1 In the embodiment, the target load 11 is connected to the first switch 17 through the circuit breaker QF3. Figure 1 When the energy storage converter 14 switches from the off-grid mode to the grid-connected mode, the second switch 18 (STS) is automatically closed. When the energy storage converter 14 switches from the grid-connected mode to the off-grid mode, the circuit breaker QF3 is closed to disconnect the circuit breakers QF1 and QF2.

[0102] Among them, Figure 1 In the figure, the energy storage management device 19 establishes communication connection with the target load 11, the photovoltaic panel 12, the DCDC converter 13, the energy storage inverter 14, the mains 15, the diesel generator 16, the first switching switch 17, and the second switching switch 18. The energy storage management device 19 can be represented by EMS. The energy storage management device 19 is used to collect data, process data, store data, query data and analyze data for the energy storage battery 10.

[0103] In an optional implementation manner, the microgrid hybrid control system in the embodiment of the present disclosure further includes:

[0104] Air conditioning, connected to energy storage management equipment.

[0105] Specifically, the air conditioner can be an air-cooled air conditioner. When the energy storage management device collects the data point of the energy storage battery (the fan is on) or the air conditioner humidity parameter is ≥75%, the air conditioner is turned on without making other settings. When the energy storage management device collects the data point of the energy storage battery (the fan is off) or the air conditioner humidity parameter is ≤65%, the air conditioner is turned off without making other settings. When the on and off conditions conflict, the on condition takes precedence. In this way, unnecessary internal circulation can be greatly reduced, thereby greatly reducing the power consumption of the auxiliary circuit.

[0106] According to an embodiment of the present invention, a control method embodiment of a microgrid hybrid control system is provided, which is applied to the microgrid hybrid control system in the above embodiment. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0107] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 2 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0108] Step S201, if the mains disconnection signal of the first switching switch is monitored, obtain the current remaining power of the energy storage battery, the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, the maximum allowable power of the DCDC converter, and the active power of the energy storage inverter.

[0109] Specifically, the mains power failure signal of the first switch indicates that Figure 1 There is no data in ATS-NA / NB / NC in the first switch. When the city power is off, there is no data in ATS-NA / NB / NC of the first switch. At this time, the current remaining power SOC of the energy storage battery and the current output power of the energy storage inverter can be obtained through real-time monitoring. , power consumption of target load , the current power generation of photovoltaic panels , the current output power of the DCDC converter , the maximum allowable power of the photovoltaic panel can be retrieved from the memory , the maximum allowable power of the DCDC converter .

[0110] Step S202: if the current remaining power of the energy storage battery is less than or equal to a first preset threshold, the first switching switch is used to switch from the mains power supply mode to the diesel generator power supply mode.

[0111] Specifically, when the mains power is cut off and the current remaining power SOC of the energy storage battery is less than or equal to 30%, the mains power supply mode is switched to the diesel generator power supply mode through the first switch. The first preset threshold is used as a start-up condition for the diesel generator after the mains power is cut off.

[0112] In a specific example, when the city power is cut off, the first switching switch ATS will be in a power-off state before the diesel generator is started. The energy storage management device EMS needs to start the diesel generator first. When it is monitored that the communication of the first switching switch ATS is restored and the voltage state parameters RA / RB / RC are all in normal state, the backup power closing command is issued, and the normal power branch will be automatically disconnected.

[0113] Furthermore, in the process of switching from the AC power supply mode to the diesel generator power supply mode through the first switching switch, when the real-time voltage RA / RB / RC of the first switching switch ATS has data and the status parameters of the first switching switch ATS show that the standby position is in a valid state, it proves that the first switching switch ATS has switched successfully.

[0114] Furthermore, in the process of the first switching switch switching from the AC power supply mode to the diesel generator power supply mode, if the real-time voltage RA / RB / RC of the first switching switch ATS has no data, it is judged as a failure; if the status parameters of the first switching switch ATS show that the standby position is in an invalid state, it is judged as a failure. If the switching is judged as a failure 3 minutes after the switching action is executed, the energy storage management device EMS executes the switching action again.

[0115] When the diesel generator is started successfully, Figure 1 In the example, after switching from the mains power supply mode to the diesel generator power supply mode through the first switching switch, the second switching switch is automatically closed, and the energy storage converter enters the grid-connected mode. At this time, in order to ensure the successful start of the diesel generator, it is possible to first monitor whether the energy storage converter has successfully switched to the grid-connected state. When it is detected that the energy storage converter is already in the grid-connected state, the diesel generator has been successfully started and can run in the diesel generator power supply mode.

[0116] Step S203, based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, generate a first power supply control strategy based on the diesel generator power supply mode.

[0117] Specifically, the first power supply control strategy represents the corresponding power supply strategy under the diesel generator power supply mode, which involves photovoltaic panels, city power, diesel generators, and energy storage batteries to supply power to the target load. The priority order of power supply to the target load under the diesel generator power supply mode is photovoltaic panels, energy storage batteries, and diesel generators.

[0118] Furthermore, the first power supply control strategy includes a control strategy corresponding to when the remaining power SOC of the energy storage battery satisfies the following conditions after the diesel generator is started.

[0119] First condition: , based on the current output power of the energy storage converter , power consumption of target load , the current power generation of photovoltaic panels , the current output power of the DCDC converter , the maximum allowable power of photovoltaic panels , the maximum allowable power of the DCDC converter , execute the first control process.

[0120] Second condition: , based on the current output power of the energy storage converter , power consumption of target load , the current power generation of photovoltaic panels , the current output power of the DCDC converter , the maximum allowable power of photovoltaic panels , the maximum allowable power of the DCDC converter , execute the second control process.

[0121] Third condition: , corresponding to the second condition after the diesel generator is started, Since the energy storage converter is still in operation, it is impossible to ensure that the energy storage battery will not lose power. (It can be flexibly set as needed) to control the energy storage converter to shut down and stop supplying power to the target load through the energy storage converter.

[0122] Fourth condition: , corresponding to the situation where the photovoltaic panel charges the energy storage battery after the diesel generator is started, so there will be the current remaining power of the energy storage battery The rising problem The continuous increase of the need to implement a charging protection, when in diesel generator power supply mode When the DCDC converter needs to be turned off, Start the DCDC converter.

[0123] In the disclosed embodiment, if the diesel generator communicates through the 485 / CAN gateway, the working status information of the diesel generator can be displayed on the energy storage management device EMS; if the diesel generator has no communication, it can be started by low voltage, or the intermediate relay can be controlled by the energy storage management device EMS to control the start of the diesel generator.

[0124] The disclosed embodiment adds diesel generator power generation control, and by generating a first power supply control strategy in the diesel generator power supply mode, it is possible to achieve hybrid power supply of the target load by the diesel generator, photovoltaic panels, and energy storage batteries when the mains power is cut off. At the same time, after the mains power is restored, it can switch to the mains power supply mode and generate a second power supply control strategy. Therefore, the present invention can ensure flexible switching between the mains power and the diesel generator, which is both safe and intelligent.

[0125] Step S204: if a mains power recovery signal of the first switching switch is detected, the power supply mode is switched from the diesel generator power supply mode to the mains power supply mode through the first switching switch.

[0126] Specifically, when the diesel generator is cut off, the energy storage management device EMS detects the incoming signal (current voltage status information) of the first switching switch, and determines that the mains power has been restored when the status of ATS-NA / NB / NC is 1. After the mains power is restored, the first switching switch is used to switch from the diesel generator power supply mode to the mains power supply mode.

[0127] In a specific example, when the city power comes in, the energy storage management device EMS needs to shut down the diesel generator first. When it detects that the communication of the first switching switch ATS is restored and the voltage state parameters RA / RB / RC are all in an invalid state, it will issue a normal power closing command and the backup power branch will be automatically disconnected.

[0128] Furthermore, in the process of switching from the diesel generator to the AC power supply mode through the first switching switch, when the real-time voltage NA / NB / NC of the first switching switch ATS has data and the status parameters of the first switching switch ATS show that the commonly used position is in a valid state, it proves that the ATS has successfully switched the AC power branch.

[0129] Furthermore, in the process of the first switching switch switching from the diesel generator power supply mode to the AC power supply mode, if the real-time voltage NA / NB / NC of the first switching switch ATS has no data, it is judged as a failure, and if the ATS status parameter standby position is in an invalid state, it is judged as a failure. If the switching action is judged to have failed 3 minutes after the switching action is executed, the energy storage management device EMS executes the switching action again.

[0130] After the AC mode is successfully started, Figure 1 In the example, when the first switch is used to switch from the diesel generator power supply mode to the mains power supply mode, the second switch is automatically closed, and the energy storage converter enters the grid-connected mode. At this time, in order to ensure the success of the mains startup, it is possible to first monitor whether the energy storage converter has successfully switched to the grid-connected state. When it is detected that the energy storage converter is already in the grid-connected state, the mains startup is successful and can be operated in the mains power supply mode.

[0131] Step S205, based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage inverter, generate a second power supply control strategy based on the AC power supply mode.

[0132] Specifically, the second power supply control strategy represents the corresponding power supply strategy under the mains power supply mode, which involves photovoltaic panels, mains power, and energy storage batteries to supply power to the target load. In the mains power supply mode, the priority order of supplying power to the target load is photovoltaic panels, mains power, and energy storage batteries.

[0133] Furthermore, the second power supply control strategy includes a control strategy corresponding to when the remaining power SOC of the energy storage battery satisfies the following conditions after the AC power supply mode is switched.

[0134] Fifth Condition: , based on the current output power of the energy storage converter , power consumption of target load , the current power generation of photovoltaic panels , the current charging power of the energy storage battery , the current output power of the DCDC converter , the maximum allowable power of photovoltaic panels , execute the third control process.

[0135] Sixth condition: , correspondingly judging whether the energy storage battery is triggered to the charging state, under the sixth condition, if the energy storage battery is triggered to the charging state, the action is performed according to the third control process mentioned above, that is, according to the fifth condition, , corresponding control process; if the energy storage battery is not triggered to the charging state, the action is performed according to the fourth control process described below, that is, according to the seventh condition, , perform the action.

[0136] The seventh condition, The seventh condition is the upper limit condition of the energy storage battery, based on the current output power of the energy storage converter , power consumption of target load , the current power generation of photovoltaic panels , the current charging power of the energy storage battery , the current output power of the DCDC converter , the maximum allowable power of photovoltaic panels , execute the fourth control process.

[0137] The disclosed embodiment generates a second power supply strategy in the AC power supply mode, thereby enabling hybrid power supply to the target load through AC power, photovoltaic panels, and energy storage batteries when the diesel generator is cut off, and can also ensure flexible switching between AC power and diesel generators, which is both safe and intelligent.

[0138] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 3 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 3 As shown, step S203, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated. The process includes the following steps:

[0139] If the current remaining power of the energy storage battery is greater than the second preset threshold and less than or equal to the first preset threshold, it corresponds to the first condition above: , execute the following first control process:

[0140] Step S301, if the current output power of the energy storage inverter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel.

[0141] Specifically, if the current output power of the energy storage inverter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is greater than or equal to the power consumption of the target load, it means that the energy storage battery still stores a certain amount of electricity and the current energy of the photovoltaic panel is sufficient. The target load is urgently needed to be powered, and the photovoltaic panel is used to power the target load first. The power supply process needs to be performed according to the current output power of the energy storage inverter = the power consumption of the target load, and the current output power of the DCDC converter = the maximum allowable power of the photovoltaic panel, so as to fully utilize the energy of the photovoltaic panel.

[0142] Step S302, charging the energy storage battery with the excess electricity supplied by the photovoltaic panel to the target load.

[0143] Specifically, the photovoltaic panels are powered at the maximum allowable power Supply power to the target load. ,

[0144] It represents the excess power of the photovoltaic panel to supply power to the target load, and the excess power is used to charge the energy storage battery to ensure that the energy storage battery is fully charged.

[0145] Step S303, if the current output power of the energy storage inverter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is less than the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel.

[0146] Specifically, if the current output power of the energy storage inverter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is less than the power consumption of the target load, it means that the energy storage battery still stores a certain amount of electricity and the current energy of the photovoltaic panel is insufficient, but the target load is urgently needed to be powered. The target load is powered by the photovoltaic panel first. The power supply process needs to be performed according to the current output power of the energy storage inverter = the power consumption of the target load, and the current output power of the DCDC converter = the maximum allowable power of the photovoltaic panel, so as to fully utilize the energy of the photovoltaic panel.

[0147] Step S304, the target load is supplied with power by the energy storage battery instead of the photovoltaic panel.

[0148] Specifically, the photovoltaic panels are powered at the maximum allowable power Power the target load. The power consumption of the target load is express, , It indicates that the photovoltaic panels are insufficient to supply power to the target load, and the energy storage battery will supply power to the target load. Therefore, in the diesel generator power supply mode, the photovoltaic panels are used to supply power to the target load first, and the energy storage battery is used to supply power to the target load secondly.

[0149] Step S305, if the current output power of the energy storage inverter is less than the power consumption of the target load, the current output power of the energy storage inverter is equal to the maximum allowable output power of the energy storage inverter, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel.

[0150] Specifically, if the current output power of the energy storage converter is less than the power consumption of the target load, it means that the energy storage battery still has a certain amount of electricity stored, and the current energy of the energy storage converter is insufficient, but the target load is urgently needed to be powered, and the target load is powered by the photovoltaic panel first. The power supply process needs to be in accordance with the current output power of the energy storage converter = the maximum allowable output power of the energy storage converter, and the current output power of the DCDC converter = the maximum allowable power of the photovoltaic panel. At this time, since the current energy of the energy storage converter is insufficient, there is no need to charge the energy storage battery.

[0151] exist Figure 3For the specific contents of steps S201 to S205, please refer to the above examples and will not be repeated here.

[0152] In the embodiment of the present disclosure, when the diesel generator is in power supply mode and the current remaining power of the energy storage battery meets The first control process is executed at the same time, that is, the first power supply strategy is generated under the diesel generator power supply mode, and when the diesel generator is cut off, the target load can be powered by the diesel generator, photovoltaic panels, and energy storage batteries in a hybrid manner, which is safe and intelligent.

[0153] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 4 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 4 As shown, step S203, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated. The process includes the following steps:

[0154] If the current remaining power of the energy storage battery is less than or equal to the second preset threshold, corresponding to the second condition above, , execute the second control process as follows:

[0155] Step S401, if the current output power of the energy storage inverter is greater than or equal to the power consumption of the target load and the current power generation power of the photovoltaic panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel.

[0156] Specifically, if the current output power of the energy storage inverter ≧ the power consumption of the target load and the current power generation power of the photovoltaic panel ≧ the power consumption of the target load, it means that the energy storage battery is insufficient and the current energy of the photovoltaic panel is sufficient. The target load is urgently needed to be powered, and the photovoltaic panel is used to power the target load first. The power supply process needs to be performed according to the current output power of the energy storage inverter = the power consumption of the target load, and the current output power of the DCDC converter = the maximum allowable power of the photovoltaic panel, so as to fully utilize the energy of the photovoltaic panel.

[0157] Step S402, charging the energy storage battery with the excess electricity supplied by the photovoltaic panel to the target load.

[0158] Specifically, the photovoltaic panels are powered at the maximum allowable power Power the target load. The power consumption of the target load is express, , It represents the excess power of the photovoltaic panel to supply power to the target load, and the excess power is used to charge the energy storage battery to ensure that the energy storage battery is fully charged.

[0159] Step S403, if the current output power of the energy storage inverter is greater than or equal to the power consumption of the target load and the current output power of the photovoltaic panel is less than the power consumption of the target load, the current output power of the energy storage inverter is equal to the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel.

[0160] Specifically, if the current output power of the energy storage inverter is ≧ the power consumption of the target load and the current power generation power of the photovoltaic panel is less than the power consumption of the target load, it means that the energy storage battery is insufficient and the current energy of the photovoltaic panel is sufficient. The target load is urgently needed to be powered, and the photovoltaic panel is used to power the target load first. The power supply process needs to be performed according to the current output power of the energy storage inverter = the power consumption of the target load, and the current output power of the DCDC converter = the maximum allowable power of the photovoltaic panel, so as to make full use of the energy of the photovoltaic panel and.

[0161] Step S404, charging the energy storage battery with excess electricity generated by the photovoltaic panel for the target load.

[0162] Specifically, the photovoltaic panels are powered at the maximum allowable power Power the target load. The power consumption of the target load is express, , It represents the excess power of the photovoltaic panel to supply power to the target load, and the excess power is used to charge the energy storage battery to ensure that the energy storage battery is fully charged.

[0163] Step S405, if the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the photovoltaic panel has no available power, the energy storage converter is controlled to standby mode, and the DCDC converter is controlled to enter shutdown mode.

[0164] Specifically, if the current output power of the energy storage inverter is ≧ the power consumption of the target load and the photovoltaic panel has no available power, then it is necessary to control the energy storage inverter to shut down to ensure the safety of the DCDC converter. At the same time, the energy storage inverter needs to be controlled to standby to save energy.

[0165] Step S406, if the current output power of the energy storage inverter is less than the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel.

[0166] Specifically, if the current output power of the energy storage inverter is less than the power consumption of the target load, it means that the energy storage battery is insufficient and the energy of the photovoltaic panel is just enough. The target load needs to be powered urgently, and the photovoltaic panel is used to power the target load first. The power supply process needs to be performed according to the current output power of the energy storage inverter = the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter = the maximum allowable power of the photovoltaic panel.

[0167] exist Figure 4 For the specific contents of steps S201 to S205, please refer to the above examples and will not be repeated here.

[0168] In the embodiment of the present disclosure, when the diesel generator is in power supply mode and the current remaining power of the energy storage battery meets The second control process is executed when the diesel generator is powered on, that is, the first power supply strategy is generated in the diesel generator power supply mode, and it can be achieved when the diesel generator is cut off. When the energy storage battery is insufficient, the energy storage battery will not supply power to the target load. Instead, the target load will be supplied with a hybrid power supply through diesel generators and photovoltaic panels, which is both safe and intelligent.

[0169] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 5 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 5 As shown, in the above step S203, based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated. The process includes the following steps:

[0170] Step S501, if the current remaining power of the energy storage battery is less than or equal to a third preset threshold, control the energy storage converter to shut down to stop supplying power to the target load through the energy storage converter, and the third preset threshold is less than the second preset threshold.

[0171] Specifically, step S501 corresponds to the third condition above, that is, In the diesel generator power supply mode, when SOC≤15%, the photovoltaic panels still supply power to the outside through the energy storage converter, so it is impossible to ensure that the battery power will not be lost. Therefore, when the energy storage management device detects SOC≤5% (which can be set as needed), it indicates that the energy storage battery is insufficient, and the energy storage converter needs to be controlled to shut down and stop supplying power to the external target load, thereby ensuring that the photovoltaic panels charge the energy storage battery alone through the DCDC converter.

[0172] exist Figure 5 For the specific contents of steps S201 to S205, please refer to the above examples and will not be repeated here.

[0173] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure can ensure that the photovoltaic power generation panel charges the energy storage battery alone when the energy storage battery is insufficient in the diesel generator power supply mode.

[0174] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 6 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 6 As shown, in the above step S203, based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated. The process includes the following steps:

[0175] Step S601, in the diesel generator power supply mode, when there is a photovoltaic power generation panel and simultaneously powers the target load, if the current remaining power of the energy storage battery increases from the first preset threshold to the fourth preset threshold, the DCDC converter is controlled to be turned off until the current remaining power of the energy storage battery is less than or equal to the fifth preset threshold, and then the DCDC converter is started.

[0176] Specifically, step S601 corresponds to the fourth condition mentioned above, that is, In the diesel generator power supply mode, after the diesel generator is started, the photovoltaic panels charge the energy storage battery. Therefore, there will be a current remaining power of the energy storage battery. The rising problem The continuous increase of the need to implement a charging protection, when in diesel generator power supply mode When the DCDC converter needs to be turned off, Start the DCDC converter.

[0177] Therefore, in the embodiment of the present disclosure, by executing the first power supply strategy of charging prohibition protection when the current remaining power SOC of the energy storage battery is continuously increased in the diesel generator power supply mode, it can be achieved that when the city power is cut off, the target load can be powered by a hybrid power supply of the diesel generator, photovoltaic panels, and energy storage batteries, which ultimately not only ensures the safety of the energy storage battery but also realizes the intelligence of the power supply to the target load.

[0178] exist Figure 6 For the specific contents of steps S201 to S205, please refer to the above examples and will not be repeated here.

[0179] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 7 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 7 As shown, in the above step S205, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated. The process includes the following steps:

[0180] If the current remaining power of the energy storage battery is less than or equal to the sixth preset threshold, it corresponds to the fifth condition above, that is, , execute the following third control process:

[0181] Step S701, if the current power generation power of the photovoltaic panel is greater than the current charging power of the energy storage battery, the energy storage battery is charged according to the active power of the energy storage inverter being equal to the surplus power of the photovoltaic panel, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches a preset voltage.

[0182] Specifically, if the current power generation of the photovoltaic panel is greater than the current charging power of the energy storage battery, the energy storage battery is charged according to the active power of the energy storage converter = the residual power of the photovoltaic panel, and the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel. Indicates that the maximum allowable power of photovoltaic panels is Indicates that the target load power consumption is express, At this time, it means that the energy storage battery is in a charging state, and the current energy of the photovoltaic panel is sufficient. The energy storage battery can be charged now, and the photovoltaic panel is used to charge the energy storage battery first. The charging process needs to be carried out according to the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel. When the maximum voltage of the single cell of the energy storage battery reaches the preset voltage, it means that the energy storage battery is fully charged. When the maximum voltage of the single cell of the energy storage battery reaches the preset voltage, charging is prohibited to protect the energy storage battery.

[0183] Step S702: If the current power generation power of the photovoltaic panel is equal to the current charging power of the energy storage battery, the energy storage converter is controlled to standby, and the energy storage battery is charged through the photovoltaic panel. At the same time, the energy storage battery is charged according to the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches a preset voltage.

[0184] Specifically, if the current power generation of the photovoltaic panel = the current charging power of the energy storage battery, the energy storage battery is charged according to the active power of the energy storage converter = the residual power of the photovoltaic panel, and the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel. Indicates that the maximum allowable power of photovoltaic panels is Indicates that the target load power consumption is express, At this time, it means that the energy storage battery is in a charging state, and the current energy of the photovoltaic panel is sufficient. The energy storage battery can be charged now, and the photovoltaic panel is used to charge the energy storage battery first. The charging process needs to be carried out according to the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel. When the maximum voltage of the single cell of the energy storage battery reaches the preset voltage, it means that the energy storage battery is fully charged. When the maximum voltage of the single cell of the energy storage battery reaches the preset voltage, charging is prohibited to protect the energy storage battery.

[0185] Step S703, if the current power generation power of the photovoltaic panel is less than the current charging power of the energy storage battery, the energy storage battery is charged according to the current output power of the energy storage inverter being equal to the remaining charging power of the energy storage battery, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches a preset voltage.

[0186] Specifically, if the current power generation of the photovoltaic panel is less than the current charging power of the energy storage battery, the energy storage battery is charged according to the active power of the energy storage converter = the residual power of the photovoltaic panel, and the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel. Indicates that the maximum allowable power of photovoltaic panels is Indicates that the target load power consumption is express, At this time, it means that the energy storage battery is in a charging state, and the current energy of the photovoltaic panel is sufficient. The energy storage battery can be charged now, and the photovoltaic panel is used to charge the energy storage battery first. The charging process needs to be carried out according to the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel. When the maximum voltage of the single cell of the energy storage battery reaches the preset voltage, it means that the energy storage battery is fully charged. When the maximum voltage of the single cell of the energy storage battery reaches the preset voltage, charging is prohibited to protect the energy storage battery.

[0187] Step S704: if the photovoltaic power generation panel has no available power, the energy storage battery will be charged by the mains, and at the same time, the energy storage inverter will be controlled to charge the energy storage battery at full power, and the DCDC converter will be controlled to be turned off.

[0188] Specifically, the energy storage battery is charged preferentially through the photovoltaic panels. When there is no available power in the photovoltaic panels, the energy storage battery is charged through the mains. At the same time, the energy storage inverter is controlled to charge the energy storage battery at full power, and the DCDC converter is controlled to be turned off, so as to fully utilize the energy storage inverter and protect the safety of the DCDC converter.

[0189] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the mains power supply mode and At the same time, a second power supply control strategy is generated to charge the energy storage battery through the photovoltaic power generation panel first, and then the energy storage battery is charged through the mains, so as to save the mains power and ensure the safety of the energy storage battery charging at the same time.

[0190] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 7 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 7 As shown, in the above step S205, based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated. The process includes the following steps:

[0191] Step S801: if the current remaining power of the energy storage battery is between the sixth preset threshold and the seventh preset threshold, it is determined whether the energy storage battery is triggered to a charging state.

[0192] Specifically, step S901 corresponds to the sixth condition mentioned above, that is, When the current remaining power SOC of the energy storage battery is in this range, although the current power of the energy storage battery is sufficient, it can still be charged. At this time, it is necessary to judge whether the energy storage battery is triggered to the charging state, and the different control processes corresponding to the triggered charging state and the non-triggered charging state.

[0193] Step S802: if the energy storage battery is triggered to a charging state and the current remaining power of the energy storage battery is less than or equal to a sixth preset threshold, an action is performed according to the third control process.

[0194] Specifically, the third control process refers to the above-mentioned steps S701 to S705, which will not be described in detail here.

[0195] Step S803, if the energy storage battery is not triggered to the charging state, control the energy storage battery to perform an action according to the fourth control process corresponding to the seventh preset threshold, and the seventh preset threshold is the full load power of the energy storage battery.

[0196] Specifically, the fourth control process refers to the following steps S901-S902.

[0197] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the mains power supply mode and It can judge whether the energy storage battery is triggered to be in charging state, realize flexible charging of the energy storage battery, and ensure the safety of charging of the energy storage battery.

[0198] In this embodiment, a control method for a microgrid hybrid control system is provided, which can be used for computer devices such as mobile phones, tablet computers, desktop computers, portable notebooks, servers, etc. Figure 7 is a flow chart of a control method of a microgrid hybrid control system according to an embodiment of the present invention. Figure 7 As shown, if the current remaining power of the energy storage battery is equal to the seventh preset threshold, the process includes the following steps:

[0199] Step S901, if the current power generation power of the photovoltaic panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the power consumption of the target load.

[0200] Specifically, step S1001 corresponds to the seventh condition mentioned above, that is, If the current power generation of the photovoltaic panel is greater than or equal to the power consumption of the target load, it means that the energy storage battery has reached the upper limit and the current energy of the photovoltaic panel is sufficient. The target load is urgently needed to be powered. The photovoltaic panel is used to power the target load first. The power supply process is performed according to the current output power of the energy storage inverter = the power consumption of the target load, and the current output power of the DCDC converter = the power consumption of the target load, so as to make full use of the energy of the photovoltaic panel.

[0201] Step S902, if the current power generation power of the photovoltaic panel is less than the power consumption of the target load, the target load is powered according to the current output power of the energy storage inverter being equal to the maximum allowable output power of the photovoltaic panel, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic panel, and the insufficient power supply to the target load is supplied by the mains.

[0202] Specifically, step S902 still corresponds to the seventh condition mentioned above, that is, If the current power generation of the photovoltaic panel is less than the power consumption of the target load, it means that the current energy of the photovoltaic panel is insufficient and the target load is urgently needed to be powered. The photovoltaic panel is used to power the target load first, and the part of the target load that is insufficiently powered is powered by the mains. The power supply process needs to be performed according to the current output power of the energy storage inverter = the maximum allowable output power of the photovoltaic panel, and the current output power of the DCDC converter = the maximum allowable output power of the photovoltaic panel, so as to fully utilize the energy of the photovoltaic panel.

[0203] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the mains power supply mode and When the energy storage battery is in the charging state, according to Corresponding control process

[0204] Charging the energy storage battery can ensure the safety of charging the energy storage battery.

[0205] In some optional embodiments, the control method of the microgrid hybrid control system in the embodiment of the present disclosure also includes: in the diesel generator power supply mode, if the current remaining power of the energy storage battery is greater than or equal to the eighth preset threshold, switching from the diesel generator power supply mode to the dual-split mode of the diesel generator and the mains through the first switching switch.

[0206] Specifically, this step can be considered as in the diesel generator power supply mode, when In order to save the electric energy generated by the diesel generator, when the diesel generator is in power supply mode and the remaining power SOC of the energy storage battery is ≥ 60% (which can be flexibly set as needed), the dual power supply dual-split mode will be triggered.

[0207] In a specific example, when switching from the diesel generator power supply mode to the dual-split mode of the diesel generator and the mains, the switching success judgment condition is that the first switching switch ATS communication is disconnected and the energy storage converter PCS is switched to the off-grid mode. The switching failure judgment condition is that if the real-time voltage RA / RB / RC of the first switching switch ATS has data, it is judged as a failure, and if the ATS status parameter shows that the standby position is in a valid state, it is judged as a failure. If the switching action is executed for 3 minutes and it is judged that the switching fails, the energy storage management device EMS executes the switching action again.

[0208] Furthermore, the successful startup of the dual power supply dual split mode indicates:

[0209] After the second switching switch STS senses that the diesel generator is disconnected, it will link the energy storage converter PCS to quickly switch to the off-grid constant voltage mode. When the energy storage management device EMS collects that the energy storage converter PCS is in the off-grid mode, the energy storage management device EMS switches to the monitoring state to perform data collection and local dynamic environment protection.

[0210] Dual-point mode end instructions:

[0211] End condition 1: When the city power outage occurs and the SOC is monitored to be ≤30% (configurable), it is necessary to switch back to the diesel generator power supply mode.

[0212] End condition 2: The energy storage management device EMS monitors the mains incoming signal of the first switching switch ATS. When the voltage status word: NA / NB / NC is in the state of 1, it is determined that the mains has been restored. At this time, it is necessary to switch back to the mains power supply mode.

[0213] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure is in the diesel generator power supply mode and When the diesel generator is in operation, shut down the diesel generator in time to save the power generated by the diesel generator and ensure the safety of the diesel generator power supply.

[0214] In some optional implementations, the control method of the microgrid hybrid control system in the embodiment of the present disclosure further includes:

[0215] If the mains disconnect signal of the first switching switch is monitored and the current remaining power of the energy storage battery is greater than the first preset threshold and less than the seventh preset threshold, the energy storage inverter is controlled to enter the off-grid mode through the second switching switch, and the current remaining power of the energy storage battery is monitored in real time. The seventh preset threshold is the full load power of the energy storage battery.

[0216] Specifically, this step can be considered as after the power grid is cut off. When the second switch STS is automatically disconnected, the energy storage converter PCS automatically switches to off-grid mode (the photovoltaic panel and the energy storage battery are powered together). The energy storage management device EMS collects the operating status of the energy storage converter PCS. When the energy storage management device EMS collects the operating status of the energy storage converter PCS as off-grid mode, the energy storage management device EMS switches to the monitoring state to perform data collection and local dynamic environment protection.

[0217] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure, after the power grid is cut off, At the same time, the second switch is used to safely enter the off-grid mode. At the same time, the current remaining power of the energy storage battery is monitored in real time to achieve intelligent control of the microgrid hybrid control system.

[0218] In some optional implementations, the control method of the microgrid hybrid control system in the embodiment of the present disclosure further includes:

[0219] If the AC power disconnect signal of the first switching switch is detected, the first level target load is powered preferentially through the photovoltaic panels and / or energy storage batteries, the second level target load is disconnected, and then the second level target load is powered after switching from the AC power supply mode to the diesel generator power supply mode.

[0220] Specifically, the first-level target load is an important load, which is more important than the second-level target load, and the second-level target load is a secondary load. The disclosed embodiment is a 100KW energy storage converter PCS. To achieve seamless switching, the load should not exceed 100KW in theory, otherwise the energy storage converter PCS cannot drive the load and the system will be overloaded and shut down. However, this system can be directly upgraded, and the load can be set to two paths, one of which is an important load (<100KW) + a secondary load (<100KW). When the power grid is out of power, the secondary load is quickly disconnected, and only the important load is guaranteed to continue to work. At this time, it can be switched to diesel generators so that the secondary loads can continue to supply power, or the secondary loads can continue to work after the power grid is restored.

[0221] Therefore, the control method of the microgrid hybrid control system in the embodiment of the present disclosure can ensure that important loads can operate normally during a power outage by giving priority to supplying power to the first-level target loads through the different levels of target loads after a city power outage.

[0222] In some optional implementations, the control method of the microgrid hybrid control system in the embodiment of the present disclosure further includes:

[0223] Step A1, if it is monitored that the fan startup state parameter of the energy storage battery or the air conditioning humidity parameter is greater than or equal to a first preset value, turn on the air conditioning;

[0224] Step A2: when it is monitored that the fan shutdown parameter of the energy storage battery or the air conditioning humidity parameter is less than or equal to a second preset value, turn off the air conditioning.

[0225] Specifically, when the air conditioner does not need heating or cooling, it defaults to internal circulation and keeps running, consuming thousands of degrees of electricity in the internal circulation throughout its life cycle. The disclosed embodiment collects the start-up status of the fan of the air-cooled battery pack through the energy storage management device EMS, and starts the air conditioner together. The air conditioner detects the humidity in the battery box, so that the air conditioner can be started again when needed, which greatly reduces unnecessary internal circulation and greatly reduces the power consumption of the system auxiliary circuit.

[0226] The bus voltage of the microgrid hybrid control system in the embodiment of the present disclosure takes the voltage of the energy storage battery as the standard and changes all the time. The system is in a balanced state. When the energy storage battery needs to be charged, the voltage is increased. When the energy storage battery needs to be discharged, the energy storage converter PCS directly links the energy storage battery to discharge. When the voltage of the energy storage battery is too high, the bus voltage can be made equal to the energy storage battery voltage, so that the energy storage battery is in a floating charge state.

[0227] In the embodiment of the present disclosure, the first preset threshold to the seventh preset threshold, as well as the preset voltage, the first preset value, and the second preset value can be flexibly set according to actual conditions.

[0228] In this embodiment, a control device for a microgrid hybrid control system is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0229] The control device of the microgrid hybrid control system in the embodiment of the present disclosure is as follows: Figure 8 As shown, the device is used for a microgrid hybrid control system, comprising:

[0230] The data acquisition module 81 is used to acquire the current remaining power of the energy storage battery, the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter if the mains disconnection signal of the first switching switch is monitored;

[0231] A first switching module 82, configured to switch from a mains power supply mode to a diesel generator power supply mode through a first switching switch if the current remaining power of the energy storage battery is less than or equal to a first preset threshold;

[0232] A first generating module is used to generate a first power supply control strategy based on a diesel generator power supply mode based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, and the maximum allowable power of the photovoltaic panel;

[0233] The second switching module 83 is used to switch from the diesel generator power supply mode to the mains power supply mode through the first switching switch if a mains power recovery signal of the first switching switch is detected;

[0234] The second generation module 84 is used to generate a second power supply control strategy based on the AC power supply mode based on the current output power of the energy storage inverter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage inverter.

[0235] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0236] The control device of the microgrid hybrid control system in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0237] The embodiment of the present invention also provides a computer device having the above Fig. 9 The control device of the microgrid hybrid control system is shown.

[0238] See also Fig. 9 , Fig. 9 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig. 9As shown, the computer device includes: one or more processors 100, a memory 200, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig. 9 A processor 100 is taken as an example.

[0239] The processor 100 may be a central processing unit, a network processor or a combination thereof. The processor 100 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0240] The memory 200 stores instructions executable by at least one processor 100, so that the at least one processor 100 executes the method shown in the above embodiment.

[0241] The memory 200 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 200 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 200 may optionally include a memory remotely arranged relative to the processor 100, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0242] The memory 200 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 200 may also include a combination of the above types of memory.

[0243] The computer device further includes a communication interface 300 for the computer device to communicate with other devices or a communication network.

[0244] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0245] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0246] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A control method for a microgrid hybrid control system, characterized in that: For use in a microgrid hybrid control system, the system comprises: a target load, for generating a power supply load; An energy storage battery, used to supply power to the target load; A photovoltaic power generation panel, used to supply power to the target load and / or the energy storage battery; A DCDC converter, used for converting the DC output voltage of the photovoltaic panel into DC; An energy storage converter, used for converting the DC output voltage after DC conversion by the DCDC converter into an AC output voltage; Mains electricity, used to provide electrical energy to the target load; A diesel generator, used to provide electrical energy to the target load; A first switching switch, used for switching from the mains power supply mode to the diesel power generation mode, or, switching from the diesel power generation mode to the mains power supply mode; the first switching switch is connected to the second switching switch via a circuit breaker QF1; A second switching switch, used to switch from the off-grid mode of the energy storage converter to the grid-connected mode, or, to switch from the grid-connected mode of the energy storage converter to the off-grid mode; the second switching switch is connected to the target load through the circuit breaker QF2; the target load is connected to the first switching switch through the circuit breaker QF3; The energy storage management device establishes a communication connection with the target load, the photovoltaic power generation panel, the DCDC converter, the energy storage converter, the mains, the diesel generator, the first switch, the second switch, and the energy storage battery; The method comprises: If the mains disconnection signal of the first switching switch is monitored, the current remaining power of the energy storage battery, the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, the maximum allowable power of the DCDC converter, and the active power of the energy storage converter are obtained; If the current remaining power of the energy storage battery is less than or equal to a first preset threshold, switching from the mains power supply mode to the diesel generator power supply mode through a first switching switch; Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated; If a mains power recovery signal of the first switching switch is detected, switching from the diesel generator power supply mode to the mains power supply mode through the first switching switch; Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated; In the diesel generator power supply mode, if the current remaining power of the energy storage battery is greater than or equal to an eighth preset threshold, the first switching switch is used to switch from the diesel generator power supply mode to the dual-split mode of the diesel generator and the mains; If the mains disconnect signal of the first switching switch is monitored and the current remaining power of the energy storage battery is greater than the first preset threshold and less than the seventh preset threshold, the energy storage inverter is controlled to enter the off-grid mode through the second switching switch, and the current remaining power of the energy storage battery is monitored in real time. The seventh preset threshold is the full load power of the energy storage battery.

2. The method according to claim 1, characterized in that Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, including: If the current remaining power of the energy storage battery is greater than the second preset threshold and less than or equal to the first preset threshold, the following first control process is performed: If the current output power of the energy storage converter is greater than the power consumption of the target load and the current power generation power of the photovoltaic power generation panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic power generation panel; Using excess electricity from the photovoltaic panel to power the target load to charge the energy storage battery; If the current output power of the energy storage converter is greater than the power consumption of the target load and the current power generation power of the photovoltaic panel is less than the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic panel; The target load is supplied with power by the energy storage battery using the insufficient power supplied by the photovoltaic power generation panel to the target load; If the current output power of the energy storage inverter is less than the power consumption of the target load, the current output power of the energy storage inverter is equal to the maximum allowable output power of the energy storage inverter, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel.

3. The method according to claim 1, characterized in that: Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, which also includes: If the current remaining power of the energy storage battery is less than or equal to the second preset threshold, the following second control process is performed: If the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the current power generation power of the photovoltaic power generation panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load and the current output power of the DCDC converter being equal to the maximum allowable power of the photovoltaic power generation panel; Using excess electricity from the photovoltaic panel to power the target load to charge the energy storage battery; If the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the current output power of the photovoltaic panel is less than the power consumption of the target load, the current output power of the energy storage converter is equal to the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel; Using the excess electricity generated by the photovoltaic panel for the target load to charge the energy storage battery; If the current output power of the energy storage converter is greater than or equal to the power consumption of the target load and the photovoltaic power generation panel has no available power, the energy storage converter is controlled to standby mode, and the DCDC converter is controlled to enter a shutdown mode; If the current output power of the energy storage inverter is less than the power consumption of the target load, the target load is powered according to the condition that the current output power of the energy storage inverter is equal to the maximum allowable power of the photovoltaic panel, and the current output power of the DCDC converter is equal to the maximum allowable power of the photovoltaic panel.

4. The method according to claim 3, characterized in that Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, which also includes: If the current remaining power of the energy storage battery is less than or equal to a third preset threshold, the energy storage inverter is controlled to shut down to stop supplying power to the target load through the energy storage inverter, and the third preset threshold is less than the second preset threshold.

5. The method according to claim 1 or 2 or 3 or 4, characterized in that: Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the maximum allowable power of the DCDC converter, a first power supply control strategy based on the diesel generator power supply mode is generated, which also includes: In the diesel generator power supply mode, when there is a photovoltaic power generation panel and simultaneously powers the target load, if the current remaining power of the energy storage battery increases from the first preset threshold to the fourth preset threshold, the DCDC converter is controlled to be turned off until the current remaining power of the energy storage battery is less than or equal to the fifth preset threshold, and then the DCDC converter is started.

6. The method according to claim 1, characterized in that Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated, including: If the current remaining power of the energy storage battery is less than or equal to the sixth preset threshold, the following third control process is performed: If the current power generation power of the photovoltaic power generation panel is greater than the current charging power of the energy storage battery, the energy storage battery is charged according to the active power of the energy storage converter being equal to the residual power of the photovoltaic power generation panel, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic power generation panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches a preset voltage; If the current power generation power of the photovoltaic power generation panel is equal to the current charging power of the energy storage battery, the energy storage converter is controlled to standby, and the energy storage battery is charged through the photovoltaic power generation panel. At the same time, the energy storage battery is charged according to the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic power generation panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches a preset voltage; If the current power generation power of the photovoltaic power generation panel is less than the current charging power of the energy storage battery, the energy storage battery is charged according to the current output power of the energy storage inverter being equal to the remaining charging power of the energy storage battery, and the current output power of the DCDC converter being equal to the maximum allowable output power of the photovoltaic power generation panel, and charging is prohibited when the single cell maximum voltage of the energy storage battery reaches a preset voltage; If there is no available power from the photovoltaic panel, the energy storage battery will be charged through the mains, while the energy storage converter will be controlled to charge the energy storage battery at full power and the DCDC converter will be controlled to shut down.

7. The method according to claim 6, characterized in that Based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter, a second power supply control strategy based on the mains power supply mode is generated, further comprising: If the current remaining power of the energy storage battery is between the sixth preset threshold and the seventh preset threshold, determining whether the energy storage battery is triggered to a charging state; If the energy storage battery is triggered to a charging state, and the current remaining power of the energy storage battery is less than or equal to the sixth preset threshold, executing an action according to the third control process; If the energy storage battery is not triggered to the charging state, the energy storage battery is controlled to perform an action according to the fourth control process corresponding to the seventh preset threshold, and the seventh preset threshold is the full load power of the energy storage battery.

8. The method according to claim 7, characterized in that If the current remaining power of the energy storage battery is equal to the seventh preset threshold, the fourth control process described below is executed; If the current power generation power of the photovoltaic power generation panel is greater than or equal to the power consumption of the target load, the target load is powered according to the current output power of the energy storage converter being equal to the power consumption of the target load, and the current output power of the DCDC converter being equal to the power consumption of the target load; If the current power generation power of the photovoltaic power generation panel is less than the power consumption of the target load, the target load is powered according to the condition that the current output power of the energy storage inverter is equal to the maximum allowable output power of the photovoltaic power generation panel, and the current output power of the DCDC converter is equal to the maximum allowable output power of the photovoltaic power generation panel, and the insufficient power supply to the target load is supplied by the municipal power.

9. A control device for a microgrid hybrid control system, characterized in that: For use in a microgrid hybrid control system, the system comprises: a target load for generating a power supply load; An energy storage battery, used to supply power to the target load; A photovoltaic power generation panel, used to supply power to the target load and / or the energy storage battery; A DCDC converter, used for converting the DC output voltage of the photovoltaic panel into DC; An energy storage converter, used for converting the DC output voltage after DC conversion by the DCDC converter into an AC output voltage; Mains electricity, used to provide electrical energy to the target load; A diesel generator, used to provide electrical energy to the target load; A first switching switch, used for switching from the mains power supply mode to the diesel power generation mode, or, switching from the diesel power generation mode to the mains power supply mode; the first switching switch is connected to the second switching switch via a circuit breaker QF1; A second switching switch, used to switch from the off-grid mode of the energy storage converter to the grid-connected mode, or, to switch from the grid-connected mode of the energy storage converter to the off-grid mode; the second switching switch is connected to the target load through the circuit breaker QF2; the target load is connected to the first switching switch through the circuit breaker QF3; The energy storage management device establishes a communication connection with the target load, the photovoltaic power generation panel, the DCDC converter, the energy storage converter, the mains, the diesel generator, the first switch, the second switch, and the energy storage battery; The device comprises: A data acquisition module is used to acquire the current remaining power of the energy storage battery, the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter if a mains disconnection signal of the first switching switch is monitored; A first switching module, used for switching from a mains power supply mode to a diesel generator power supply mode through a first switching switch if the current remaining power of the energy storage battery is less than or equal to a first preset threshold; A first generating module is used to generate a first power supply control strategy based on the diesel generator power supply mode based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current output power of the DCDC converter, and the maximum allowable power of the photovoltaic panel; A second switching module is used to switch from the diesel generator power supply mode to the mains power supply mode through the first switching switch if a mains power recovery signal of the first switching switch is detected; A second generating module is used to generate a second power supply control strategy based on the mains power supply mode based on the current output power of the energy storage converter, the power consumption of the target load, the current power generation power of the photovoltaic panel, the current charging power of the energy storage battery, the current output power of the DCDC converter, the maximum allowable power of the photovoltaic panel, and the active power of the energy storage converter; In the diesel generator power supply mode, if the current remaining power of the energy storage battery is greater than or equal to an eighth preset threshold, the first switching switch is used to switch from the diesel generator power supply mode to the dual-split mode of the diesel generator and the mains; If the mains disconnect signal of the first switching switch is monitored and the current remaining power of the energy storage battery is greater than the first preset threshold and less than the seventh preset threshold, the energy storage inverter is controlled to enter the off-grid mode through the second switching switch, and the current remaining power of the energy storage battery is monitored in real time. The seventh preset threshold is the full load power of the energy storage battery.

10. A microgrid hybrid control system, characterized in that: include: Target load, used to generate power supply load; An energy storage battery, used to supply power to the target load; A photovoltaic power generation panel, used to supply power to the target load and / or the energy storage battery; A DCDC converter, used for converting the DC output voltage of the photovoltaic panel into DC; An energy storage converter, used for converting the DC output voltage after DC conversion by the DCDC converter into an AC output voltage; Mains electricity, used to provide electrical energy to the target load; A diesel generator, used to provide electrical energy to the target load; A first switch is used to switch from the mains power supply mode to the diesel power generation mode, or, Switching from a diesel power generation mode to the mains power supply mode; A second switching switch, used for switching from an off-grid mode of the energy storage converter to a grid-connected mode, or, for switching from a grid-connected mode of the energy storage converter to an off-grid mode; An energy storage management device establishes a communication connection with the target load, the photovoltaic power generation panel, the DCDC converter, the energy storage inverter, the mains, the diesel generator, the first switching switch, the second switching switch, and the energy storage battery, and is used to execute the control method of the microgrid hybrid control system according to any one of claims 1 to 8.

11. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the control method of the microgrid hybrid control system according to any one of claims 1 to 8 by executing the computer instructions.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the control method of the microgrid hybrid control system according to any one of claims 1 to 8.

13. A computer program product, characterized in that It comprises computer instructions, and the computer instructions are used to enable a computer to execute the control method of the microgrid hybrid control system according to any one of claims 1 to 8.

Images