Off-grid electric-thermal combined system and method for well site

Abstract

The application discloses an off-grid well site electric-thermal combined supply system and method, relates to the technical field of energy development, and comprises a hybrid energy storage system, a plurality of power supply systems and a micro-grid controller. The micro-grid controller is used for controlling the photovoltaic power generation system and the wind power generation system to provide energy for the load of the micro-grid when it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand; controlling the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system to provide energy for the load when it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand; and controlling the target system to provide energy for the load of the micro-grid when it is determined that the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system cannot meet the load demand. The application is used to solve the problem of low micro-energy utilization rate in the prior art during energy development, and realizes the improvement of energy utilization rate.

Description

Technical Field

[0001] The present application relates to the field of energy development technology, and in particular to an off-grid well site combined heat and power supply system and method. Background Art

[0002] Off-grid oil and gas production sites are located in remote areas, facing challenges such as difficulty in power transmission and supply, and low energy utilization. Current power supply systems primarily rely on fuel-fired generators or fuel-fired generators combined with photovoltaics.

[0003] Fuel-fired generator sets are typically powered by a single or multiple diesel engines. This requires fuel delivery and maintenance, and also suffers from a single power source, environmental pollution, high noise levels, and high energy consumption. Fuel-fired generator sets combined with photovoltaics typically use photovoltaic power as the primary power source during the day, with the diesel generator set serving as an auxiliary power source, and the diesel generator set providing a single source of power at night. However, this approach suffers from energy waste, low utilization, and the same issues with diesel generator power supply. Summary of the Invention

[0004] In response to the above problems and technical needs, the applicant has proposed an off-grid combined heat and power supply system and method for a well site to solve the problem of low micro-energy utilization rate in energy development in the existing technology and to improve energy utilization rate.

[0005] The present application provides an off-grid combined heat and power supply system for a well site. The combined heat and power supply system includes:

[0006] hybrid energy storage systems, multiple power supply systems, and microgrid controllers;

[0007] The hybrid energy storage system includes: an electric energy storage system and a thermal oil furnace system;

[0008] The plurality of power supply systems include: a photovoltaic power generation system, a wind power generation system, and a fuel power generation system;

[0009] The hybrid energy storage system stores energy through the surplus energy corresponding to the photovoltaic power generation system and the wind power generation system, where the surplus energy is the excess energy when the photovoltaic power generation system and the wind power generation system meet the load demand corresponding to the load of the microgrid;

[0010] The hybrid energy storage system and the power supply system are connected to the microgrid via a bus, and the hybrid energy storage system and the power supply system are respectively communicatively connected to the microgrid controller;

[0011] The microgrid controller is configured to, when it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand, control the photovoltaic power generation system and the wind power generation system to provide energy for the load of the microgrid; when it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand, control the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system to provide energy for the load; when it is determined that the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system cannot meet the load demand, control the target system to provide energy for the load of the microgrid;

[0012] Wherein, the target system includes: the photovoltaic power generation system, the wind power generation system and the fuel power generation system, or the hybrid energy storage system, the photovoltaic power generation system, the wind power generation system and the fuel power generation system;

[0013] The load is a device used for extracting energy in a microgrid corresponding to the well site.

[0014] According to the off-grid well site combined heat and power system provided in the embodiment of the present application, the load demand includes: required power;

[0015] The microgrid controller is used to obtain the operating parameters of each system in operation in the combined heat and power supply system, the energy supply parameters of each system not in operation, the required power, and the current operating mode of the combined heat and power supply system; based on the operating parameters, the energy supply parameters, the required power and the current operating mode, adjust the operating mode of the combined heat and power supply system, or adjust the operating status of each system in the combined heat and power supply system.

[0016] According to the off-grid well site combined heat and power system provided in the embodiment of the present application, the operating parameters include: output power;

[0017] The energy supply parameters include: the remaining capacity of the hybrid energy storage system;

[0018] The microgrid controller is configured to, when determining that the current operating mode is the first operating mode and the operating systems are the photovoltaic power generation system and the wind power generation system, obtain a first output power corresponding to the photovoltaic power generation system, a second output power of the wind power generation system, and the remaining capacity; and control the operating states of the photovoltaic power generation system, the wind power generation system, and the hybrid energy storage system based on the first output power, the second output power, the remaining capacity, and the load power;

[0019] Among them, the systems corresponding to the first operating mode include: the photovoltaic power generation system, the wind power generation system and the hybrid energy storage system.

[0020] According to the off-grid well site electric-thermal combined supply system provided in the embodiment of the present application, the micro-grid controller is configured to, in a case where the power sum of the first output power and the second output power is greater than the load power and the residual capacity is greater than or equal to the first preset capacity, adjust the first output power so that the first output power after adjustment and the second output power are equal to the load power.

[0021] In a case where the power sum of the first output power and the second output power is greater than the load power and the residual capacity is less than the first preset capacity, the residual energy is used to supply energy for the hybrid energy storage system.

[0022] In a case where the first output power and the second output power are less than the load power, the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system are controlled to supply energy for the load.

[0023] According to the off-grid well site electric-thermal combined supply system provided in the embodiment of the present application, the micro-grid controller is configured to, in a case where the current operation mode is the first operation mode and the system being operated is the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system, acquire the residual capacity; and in a case where the residual capacity is less than the second preset capacity, adjust the current operation mode to the second operation mode.

[0024] The system corresponding to the second operation module includes the photovoltaic power generation system, the wind power generation system, the hybrid energy storage system and the fuel oil power generation system.

[0025] According to the off-grid well site electric-thermal combined supply system provided in the embodiment of the present application, the micro-grid controller is configured to, in a case where the current operation mode is the second operation mode, acquire the residual capacity of the hybrid energy storage system and the power sum of the first output power and the second output power in real time; and in a case where the residual capacity is greater than or equal to the first preset capacity and / or the power sum is greater than or equal to the load power, adjust the current operation mode to the first operation mode.

[0026] According to the off-grid well site electric-thermal combined supply system provided in the embodiment of the present application, the micro-grid controller is configured to, when the electric-thermal combined supply system starts, start the electric energy storage system to supply power for the micro-grid and start the photovoltaic power generation system and the wind power generation system; acquire the sub-residual capacity of the electric energy storage system; and based on the sub-residual capacity and the load demand, adjust the output power of the photovoltaic power generation system and the wind power generation system.

[0027] According to the off-grid well site electric-heat combined supply system provided in the embodiments of the present application, the micro-grid controller is further configured to: acquire operation parameters of each system in operation in the electric-heat combined supply system and job parameters of the load; compare consistency of the operation parameters and preset operation parameters and consistency of the job parameters and preset job parameters; determine that the micro-grid is unstable in a case where any one or more of the operation parameters and the preset operation parameters are inconsistent and the job parameters and the preset job parameters are inconsistent; and control the hybrid energy storage system to perform charging and discharging operation based on a first parameter difference between the operation parameters and the preset operation parameters and / or a second parameter difference between the job parameters and the preset job parameters, so as to adjust stability of the micro-grid.

[0028] According to the off-grid well site electric-heat combined supply system provided in the embodiments of the present application, the micro-grid controller is further configured to: control the electric energy storage system to perform charging and discharging operation and / or control the heat-conducting oil furnace system to enter an external heat release state, so as to adjust stability of the micro-grid and normal job of the load.

[0029] The embodiments of the present application further provide an off-grid well site electric-heat combined supply method, which is applied to the off-grid well site electric-heat combined supply of any one of the above-mentioned embodiments, and the method comprises the following steps.

[0030] In a case where it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load of the micro-grid;

[0031] In a case where it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand, the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load;

[0032] In a case where it is determined that the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system cannot meet the load demand, a target system is controlled to provide energy for the load of the micro-grid;

[0033] The target system comprises the photovoltaic power generation system, the wind power generation system and a fuel oil power generation system, or the hybrid energy storage system, the photovoltaic power generation system, the wind power generation system and the fuel oil power generation system.

[0034] The load is equipment for energy exploitation in a micro-grid corresponding to the well site.

[0035] The embodiment of the present application provides an off-grid type well site combined heat and power supply system and method, the combined heat and power supply system includes: a hybrid energy storage system, multiple power supply systems and a microgrid controller; the hybrid energy storage system includes: an electric energy storage system, a thermal oil furnace system; the multiple power supply systems include: a photovoltaic power generation system, a wind power generation system, and a fuel power generation system. The hybrid energy storage system stores energy through the surplus energy corresponding to the photovoltaic power generation system and the wind power generation system. The surplus energy is the excess energy when the photovoltaic power generation system and the wind power generation system meet the load requirements corresponding to the load of the microgrid. It can be seen that the present application uses the surplus energy to store energy in the hybrid energy storage system, avoids energy waste, and improves energy utilization; the microgrid controller is used to determine whether the photovoltaic power generation system and the wind power generation system can meet the load requirements. Under certain circumstances, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load of the microgrid; when it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand, the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load; when it is determined that the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system cannot meet the load demand, the target system is controlled to provide energy for the load of the microgrid. It can be seen that this application gives priority to the use of energy corresponding to new energy for the normal operation of the load, ensures the effectiveness of resource utilization, and improves the utilization rate of resources. Further, when the energy corresponding to new energy does not meet the load demand for the normal operation of the load, the fuel power generation system is started to ensure the normal operation of the load. This application ensures the normal operation of the load on the basis of effective utilization of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 Schematic diagram of the structure of the off-grid well site combined heat and power system provided in an embodiment of the present application;

[0038] Figure 2 This is a control flow diagram of an off-grid well site combined heat and power system provided in an embodiment of the present application;

[0039] Figure 3 This is a schematic diagram of the control flow of the hybrid energy storage system provided in an embodiment of the present application;

[0040] Figure 4 is a structural diagram of a hybrid energy storage system provided in an embodiment of the present application;

[0041] Figure 5 A schematic flow chart of a method for combined heat and power generation for an off-grid well site provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] The off-grid well site combined heat and power supply system provided in the embodiment of the present application is as follows: Figure 1 As shown, it includes: a hybrid energy storage system 101, multiple power supply systems 102 and a microgrid controller 103.

[0044] The hybrid energy storage system 101 includes an electric energy storage system 1011 and a thermal oil furnace system 1012 , and the multiple power supply systems 102 include a photovoltaic power generation system 1021 , a wind power generation system 1022 , and a fuel power generation system 1023 .

[0045] Among them, the hybrid energy storage system 101 stores energy through the surplus energy corresponding to the photovoltaic power generation system 1021 and the wind power generation system 1022. The surplus energy is the excess energy when the photovoltaic power generation system 1021 and the wind power generation system 1022 meet the load demand corresponding to the load of the microgrid.

[0046] The hybrid energy storage system 101 and the power supply system 102 are connected to the microgrid via a busbar. The hybrid energy storage system 101 and the power supply system 102 are respectively communicatively connected to the microgrid controller 103 .

[0047] The microgrid controller 103 is used to control the photovoltaic power generation system 1021 and the wind power generation system 1022 to provide energy for the load of the microgrid when it is determined that the photovoltaic power generation system 1021 and the wind power generation system 1022 can meet the load demand corresponding to the load of the microgrid; control the hybrid energy storage system 101, the photovoltaic power generation system 1021 and the wind power generation system 1022 to provide energy for the load when it is determined that the photovoltaic power generation system 1021 and the wind power generation system 1022 cannot meet the load demand; and control the target system to provide energy for the load of the microgrid when it is determined that the hybrid energy storage system 101, the photovoltaic power generation system 1021 and the wind power generation system 1021 cannot meet the load demand.

[0048] The target system includes a photovoltaic power generation system 1021, a wind power generation system 1022, and a fuel oil power generation system 1023, and a hybrid energy storage system 101, the photovoltaic power generation system 1021, the wind power generation system 1022, and the fuel oil power generation system 1023.

[0049] The load is equipment for exploiting energy in a micro-grid corresponding to the well site.

[0050] The load is equipment for exploiting energy in a micro-grid corresponding to the well site. Figure 1 The bus (an alternating current power distribution system) is schematically shown by a thick line.

[0051] Specifically, the photovoltaic power generation system 1021 is composed of photovoltaic components, a combiner box, and photovoltaic converters. The combiner box is connected in parallel with multiple branches of the photovoltaic components, and each branch is composed of multiple photovoltaic components connected in series. The direct current output by each branch of the photovoltaic components is connected to the corresponding photovoltaic converter after being collected in parallel in the combiner box, and is collected into the bus after being converted by the converter.

[0052] The wind power generation system 1022 includes a wind turbine generator and a wind power converter. The wind turbine generator is connected to the bus after being converted by the converter.

[0053] The fuel oil generator of the fuel oil power generation system 1023 outputs alternating current and is directly connected to the bus. The fuel oil generator controller of the fuel oil power generation system 1023 is in communication connection with the micro-grid controller.

[0054] The electric energy storage system 1011 is composed of multiple clusters of energy storage batteries and multiple energy storage converters. Each cluster of batteries is composed of multiple battery modules connected in series, and each module is composed of multiple single batteries connected in series. The series battery cluster is connected to the low-voltage side of the energy storage converter, and the high-voltage side is connected to the bus.

[0055] The function of the heat conducting oil furnace system 1012 is to use the part of the photovoltaic power generation system abandoned during the day and / or the part of the wind power generation system abandoned to heat the heat conducting oil, and then release it when heating is needed. The heat conducting oil furnace system 1012 is composed of a heating furnace, a heat oil circulating pump, a storage tank, a controller, and the like.

[0056] As described above, all the converters and controllers are connected to the micro-grid controller through the communication bus. The controller continuously adjusts the operation of the micro-grid according to the real-time data collected by the electric heating combined power supply system.

[0057] In the entire micro-grid, the main power supply is the photovoltaic power generation system 1021 and the wind power generation system 1022, which meets the power demand of the well site. The diesel generator set (the fuel oil power generation system 1023) serves as a backup power supply to improve the reliability of the power supply of the well site and achieve the purpose of multi-energy complementation. The hybrid energy storage system 101 serves as an adjustment unit to compensate for the instability of the main power supply through reasonable charging and discharging adjustment, and also takes into account the functions of power supply and heating.

[0058] The off-grid well site electric-thermal combined supply system provided by the embodiment of the present application comprises a hybrid energy storage system, a plurality of power supply systems and a micro-grid controller. The hybrid energy storage system comprises an electric energy storage system and a heat conducting oil furnace system. The plurality of power supply systems comprise a photovoltaic power generation system, a wind power generation system and a fuel oil power generation system. The hybrid energy storage system stores energy through the corresponding residual energy of the photovoltaic power generation system and the wind power generation system. The residual energy is the excess energy when the photovoltaic power generation system and the wind power generation system meet the load demand of the load of the micro-grid. It can be seen that the present application stores energy in the hybrid energy storage system by using the residual energy, avoids the waste of energy and improves the utilization rate of energy. The micro-grid controller is used to control the photovoltaic power generation system and the wind power generation system to provide energy for the load of the micro-grid when it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand. The hybrid energy storage system, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load when it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand. The target system is controlled to provide energy for the load of the micro-grid when it is determined that the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system cannot meet the load demand. It can be seen that the present application preferentially uses the energy corresponding to the new energy to supply the normal operation of the load, ensures the effectiveness of resource utilization, improves the utilization rate of resources, and then starts the fuel oil power generation system when the energy corresponding to the new energy cannot meet the load demand of the normal operation of the load, thereby ensuring the normal operation of the load. The present application realizes the normal operation of the load on the basis of effective utilization of energy.

[0059] In one specific embodiment, the micro-grid controller 103 is used to start the electric energy storage system 101 to supply power to the micro-grid and start the photovoltaic power generation system 1021 and the wind power generation system 1022 when the electric-thermal combined supply system is started. The residual capacity of the electric energy storage system 1011 is obtained. The output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 is adjusted based on the residual capacity and the load demand.

[0060] The residual capacity is obtained based on the battery capacity of the electric energy storage system 1011 and the heat storage temperature of the heat conducting oil system 1012.

[0061] Specifically, when the combined heat and power generation system is started, the converter of the electric energy storage system 1011 in the hybrid energy storage system 101 is pre-controlled to close, so that the battery in the electric energy storage system 1011 serves as the main power source. At this time, the bus voltage is established. Next, the photovoltaic converter and the wind power converter are started, and the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 are determined based on the remaining capacity of the hybrid energy storage system 101. If the remaining capacity is less than the second preset capacity, the output of the photovoltaic converter and the wind power converter is fully released so that the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 is equal to the required power. If the remaining capacity is greater than or equal to the first preset capacity, the output power of the photovoltaic converter and the wind power converter is limited, and the hybrid energy storage system 101 is used to assist the photovoltaic power generation system 1021 and the wind power generation system 1022 in providing energy to the load.

[0062] Among them, the specific limit value (or the ratio of the output power of the hybrid energy storage system 101, the photovoltaic power generation system 1021 and the wind power generation system 1022) can be set by the user according to his or her actual needs, and this application does not impose any restrictions.

[0063] In one specific embodiment, the load demand includes power demand. The microgrid controller 103 is configured to obtain operating parameters of each operating system in the combined heat and power generation system, energy supply parameters of each non-operating system, power demand, and the current operating mode of the combined heat and power generation system; and adjust the operating mode of the combined heat and power generation system or the operating status of each system in the combined heat and power generation system based on the operating parameters, functional parameters, power demand, and current operating mode.

[0064] Among them, operating parameters include: output power, voltage, frequency, etc.

[0065] Among them, the energy supply parameters include: the energy supply parameters include: the remaining capacity of the hybrid energy storage system.

[0066] In a specific embodiment, the microgrid controller 103 is used to obtain the first output power corresponding to the photovoltaic power generation system 1021, the second output power and the remaining capacity of the wind power generation system 1022 when it is determined that the current operating mode is the first operating mode and the operating systems are the photovoltaic power generation system 1021 and the wind power generation system 1022; and control the operating status of the photovoltaic power generation system 1021, the wind power generation system 1022 and the hybrid energy storage system 101 based on the first output power, the second output power, the remaining capacity and the load power.

[0067] The systems corresponding to the first operating mode include: a photovoltaic power generation system 1021 , a wind power generation system 1022 and a hybrid energy storage system 101 .

[0068] Specifically, different operation modes correspond to different mode marks, and the current operation mode is determined by determining the mode mark corresponding to the current time.

[0069] Specifically, the system corresponding to the first operation mode includes the photovoltaic power generation system 1021, the wind power generation system 1022 and the hybrid energy storage system 101, but in the first operation mode, the photovoltaic power generation system 1021, the wind power generation system 1022 and the hybrid energy storage system 101 do not necessarily provide energy for the load.

[0070] In one specific embodiment, the micro-grid controller 103 is configured to, in a case where the sum of the first output power and the second output power is greater than the load power and the remaining capacity is greater than or equal to the first preset capacity, adjust the first output power so that the first output power after adjustment and the second output power are equal to the load power. In a case where the sum of the first output power and the second output power is greater than the load power and the remaining capacity is less than the first preset capacity, the remaining energy is used to provide energy for the hybrid energy storage system. In a case where the first output power and the second output power are less than the load power, the hybrid energy storage system 101, the photovoltaic power generation system 1021 and the wind power generation system 1022 are controlled to provide energy for the load.

[0071] Specifically, in a case where the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 meets the load demand of the load and there is energy remaining, the hybrid energy storage system 101 is controlled to enter a charging state (i.e., the remaining energy is used to provide energy for the hybrid energy storage system 101, so that the hybrid energy storage system 101 stores energy, specifically by charging the battery of the electric energy storage system 1011 and heating the heat conducting oil of the heat conducting oil furnace system 1012 to store energy).

[0072] In a case where the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 is exactly equal to the load demand of the load, the photovoltaic power generation system 1021 and the wind power generation system 1022 are used to provide energy for the load.

[0073] In a case where the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 is less than the load power, the hybrid energy storage system 101 is controlled to perform discharging operation and / or heat dissipation operation to assist the photovoltaic power generation system 1021 and the wind power generation system 1022 to provide energy for the load.

[0074] In one specific embodiment, the micro-grid controller 103 is configured to, in a case where it is determined that the current operation mode is the first operation mode and the system being operated is the hybrid energy storage system 101, the photovoltaic power generation system 1021 and the wind power generation system 1022, acquire the remaining capacity of the hybrid energy storage system 101; and in a case where it is determined that the remaining capacity is less than the second preset capacity, adjust the current operation mode to the second operation mode.

[0075] The first preset capacity is greater than the second preset capacity.

[0076] Among them, the systems corresponding to the second operating module include: photovoltaic power generation system 1021, wind power generation system 1022, hybrid energy storage system 101 and fuel power generation system 1023.

[0077] Specifically, when the output power of photovoltaic power generation system 1021 and wind power generation system 1022 is less than the required power, hybrid energy storage system 101 will be used to assist photovoltaic power generation system 1021 and wind power generation system 1022 in providing energy to the load. During this process, photovoltaic power generation system 1021 and wind power generation system 1022 may not provide energy to hybrid energy storage system 101, so the energy stored in hybrid energy storage system 101 will gradually decrease. Therefore, it is necessary to monitor the remaining capacity of hybrid energy storage system 101 in real time; if it is determined that the remaining capacity is less than the second preset capacity, the current operating mode is adjusted to the second operating mode.

[0078] Of course, in the above process, if the third output power of the hybrid energy storage system 101 is greater than or equal to the required power, or the sum of the third output power of the hybrid energy storage system 101 and the first output power or the second output power is greater than or equal to the required power, the hybrid energy storage system 101 can also be used to provide energy to the load, or the hybrid energy storage system 101 and the photovoltaic power generation system 1021 or the wind power generation system 1022 can be used to provide energy to the load. In this case, the system that does not provide energy to the load can provide energy to the hybrid energy storage system 101.

[0079] Specifically, if the remaining capacity is determined to be less than the second preset capacity, the hybrid energy storage system 101 may no longer be able to provide energy to the load, or if it can, it can only provide a small amount of energy. Furthermore, since the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 is less than the required power at this time, the fuel power generation system needs to be activated to ensure normal operation of the load.

[0080] In a specific embodiment, the microgrid controller 103 is used to obtain the remaining capacity of the hybrid energy storage system 101 and the power sum of the first output power and the second output power in real time when the current operating mode is the second operating mode; and adjust the current operating mode to the first operating mode when it is determined that the remaining capacity is greater than or equal to the first preset capacity and / or the power sum is greater than or equal to the load power.

[0081] Specifically, the present application shuts down the fuel power generation system 1023 (i.e., adjusts the current operating mode to the first operating mode) when the photovoltaic power generation system 1021 and the wind power generation system 1022 can meet the full load demand, or the hybrid energy storage system 101, the photovoltaic power generation system 1021 and the wind power generation system 1022 can meet the responsible demand.

[0082] In a specific embodiment, the microgrid controller 103 is further configured to determine whether the microgrid corresponding to the combined heat and power generation system is stable, and if the microgrid is determined to be unstable, adjust the stability of the microgrid by controlling the hybrid energy storage system 101 .

[0083] In a specific embodiment, the microgrid controller 103 is further used to obtain the operating parameters of each system running in the combined heat and power system and the operating parameters of the load; compare the consistency of the operating parameters with the preset operating parameters, and the consistency of the operating parameters with the preset operating parameters; determine that the microgrid is unstable when any one or more of the inconsistency between the operating parameters and the preset operating parameters and the inconsistency between the operating parameters and the preset operating parameters are established; and control the hybrid energy storage system to perform charging and discharging operations based on a first parameter difference between the operating parameters and the preset operating parameters, and / or a second parameter difference between the operating parameters and the preset operating parameters, so as to adjust the stability of the microgrid.

[0084] In a specific embodiment, the microgrid controller 103 is also used to control the electric energy storage system 1011 to perform charging and discharging operations, and / or control the thermal oil furnace system 1012 to enter an external heat release state, so as to adjust the stability of the microgrid and the normal operation of the load.

[0085] Specifically, microgrid controller 103 calculates the imbalance between the power supply and the required power within the microgrid in real time and adjusts operating conditions and modes, such as voltage and frequency, based on real-time operating parameters. The energy storage converter in hybrid energy storage system 101, in addition to operating the energy storage system 1011, is also responsible for the stability control of the entire microgrid, namely, frequency and voltage control.

[0086] Below, the present invention is specifically described through a specific embodiment:

[0087] When the output power of photovoltaic power generation system 1021 and wind power generation system 1022 is sufficient, the system operates in the first operating mode, with the photovoltaic converter and wind power converter operating in maximum power tracking output mode, and the output power can meet the power demand of the load. If there is any surplus, the hybrid energy storage system 101 is controlled to enter the charging state, wherein the electric energy storage system 1011 charges the battery and the thermal oil boiler system 1012 enters the heat storage mode. If the corresponding output power of the photovoltaic converter and wind power converter remains after the hybrid energy storage system 101 is fully charged, in order to maintain the power balance within the grid, the photovoltaic converter is controlled to the power limiting mode.

[0088] If the output power of the photovoltaic power generation system 1021 and the wind power generation system 1022 does not meet the load power demand, in order to maintain the power balance in the microgrid, the microgrid controller 103 adjusts the hybrid energy storage system 101 to discharge energy to the outside, wherein the battery discharges to the outside and the thermal oil furnace system supplies heat to the outside, thereby meeting the power and heat demand. When the remaining capacity of the hybrid energy storage system 101 is less than the second preset capacity, if the power in the microgrid is still unbalanced, the combined heat and power supply system switches to the second operating mode, and the diesel generator set (fuel power generation system 1023) is started to output power to the outside to make up for the power gap. When the photovoltaic power generation system 1021 and the wind power generation system 1022 are restored to cover the normal load power supply, or when the remaining capacity of the hybrid energy storage system 101 is greater than the first preset capacity, the microgrid controller will switch the combined heat and power supply system to the first operating mode.

[0089] When the system operation switches to the second operating mode, it is first determined whether the conditions for switching to the first operating mode are met. If the switching conditions are not met, the diesel generator set is started, and then the output power of the diesel engine is set according to the power gap. If the remaining capacity of the hybrid energy storage system 101 reaches the lower limit value (the second preset capacity), the output power of the diesel engine is set to follow the load. If the lower limit value is not reached, the diesel engine is set to run at minimum power.

[0090] The control logic for switching from the second operating mode to the first operating mode is as follows: monitoring whether the remaining capacity of the hybrid energy storage system 101 reaches an upper limit value (a first preset capacity), or whether the first output power or the second output power is greater than the load power for a period of time, the system stops the diesel engine and automatically switches to the first operating mode.

[0091] Next, through Figure 2 The following is a schematic description of this application:

[0092] Step 201 : When it is determined that the remaining capacity of the hybrid energy storage system is greater than a first preset capacity, and the sum of the first output power and the second output power is greater than or equal to the required power, controlling the combined heat and power system to operate in a first operating mode.

[0093] Step 202, when it is determined that the power sum of the first output power and the second output power is less than the required power and the remaining capacity is less than the second preset capacity, control to increase the fourth output power of the fuel power generation system so that the power sum of the first output power, the second output power and the fourth output power is equal to the required power.

[0094] Step 203: When it is determined that the power sum of the first output power and the second output power is less than the required power and the remaining capacity is greater than or equal to the second preset capacity, control the reduction of the fourth output power of the fuel power generation system so that the power sum of the first output power, the second output power, the third output power and the fourth output power is equal to the required power.

[0095] This application targets oil and gas production sites in remote, off-grid areas with power and heating needs. It utilizes photovoltaic and wind power systems as primary power sources, with diesel generators as backup. A hybrid energy storage system is also implemented to provide timely charging and discharging of energy, avoiding wind and solar curtailment.

[0096] The hybrid energy storage system implemented in this application, comprising an electric energy storage system and a thermal oil boiler system, improves energy efficiency and increases energy storage diversity. Furthermore, the diesel generator set is used only as a backup power source, reducing its frequency of use, thereby lowering carbon emissions, reducing the diesel generator set operation and maintenance workload, and reducing noise pollution.

[0097] In addition, the hybrid energy storage system 101 may further include a hybrid energy storage controller, and communicate with the microgrid controller through the hybrid energy storage controller.

[0098] Specifically, the electric energy storage system includes: at least one battery cluster and at least one energy storage converter, one battery cluster corresponds to one energy storage converter; the battery cluster and the energy storage converter are integrated through an AC bus.

[0099] Each battery cluster includes at least one battery, and each battery is connected in series to form a battery cluster.

[0100] Specifically, the battery cluster and the energy storage converter adopt a unit wiring method. The number of battery clusters and energy storage converters and the amount of energy stored in the battery cluster can be set by the user according to their actual needs, and this application does not impose any restrictions.

[0101] Specifically, the battery cluster is connected to the low-voltage side of the energy storage converter, the high-voltage side of which is connected to one end of the DC bus, and the other end of the DC bus is connected to the energy supply system. The energy storage converter is bidirectional and can realize charging and discharging functions.

[0102] Specifically, a thermal oil boiler system primarily consists of a thermal oil storage tank, an electric heater, and a heat exchanger. The main process flow involves the following: When heat storage is needed, the electric heater heats the thermal oil in the storage tank and stores it to maintain its heat. When heat release is required, the heated thermal oil flows through a pipeline and then through a heat exchanger to heat an external medium.

[0103] Specifically, the energy storage converter is connected to a hybrid energy storage controller, which is configured to control the charging and discharging of batteries in the battery cluster by controlling the energy storage converter.

[0104] Specifically, the electric energy storage system and the thermal oil furnace system are connected via an electric heater-type power supply, which is used to power the electric heater of the thermal oil furnace system.

[0105] Specifically, the DC power from the energy supply system can be used to directly power the electric heater to heat the thermal oil in the thermal oil storage tank. Alternatively, the DC power from the energy supply system can be used to power the electric heater power supply. When heat energy is needed, the electric heater power supply can be used to power the electric heater to heat the thermal oil in the thermal oil storage tank.

[0106] Specifically, the hybrid energy storage controller is also used to obtain the load type, control the electric energy storage system to perform charging and discharging operations, and / or control the thermal oil furnace system to enter an external heat release state when it is determined that the microgrid operation is unstable.

[0107] This application determines the load type based on the purpose of the load. For example, if the load needs to receive thermal energy, its load type is a thermal load. If the load needs to receive electrical energy, its load type is an electrical load. If the load can receive both thermal energy and electrical energy, its load type is a comprehensive load.

[0108] When the load type is a thermal load, the thermal oil furnace system is controlled to enter a state of external heat release based on the stability demand parameters and the load demand parameters; when the load type is an electrical load, the electric energy storage system is controlled to perform charging and discharging operations based on the stability demand parameters and the load demand parameters; when the load type is a comprehensive load, the electric energy storage system is controlled to perform charging and discharging operations, and / or the thermal oil furnace system is controlled to enter a state of external heat release.

[0109] Specifically, the hybrid energy storage controller is used to determine whether the hybrid energy storage system is in a charging state. If it is determined that the hybrid energy storage system is in a charging state, the controller charges the electric energy storage system and stores heat in the thermal oil boiler system based on the remaining energy. If it is determined that the hybrid energy storage system is not in a charging state, the controller controls the operating status of the electric energy storage system and the thermal oil boiler system based on the remaining capacity of the hybrid energy storage system.

[0110] The state of the hybrid energy storage system when the energy supply system transmits energy to the hybrid energy storage system is defined as a charging state.

[0111] Specifically, the energy supply system is connected to the electric energy storage system and the hybrid energy storage system via a DC bus. The DC bus transmits the surplus energy to the electric energy storage system for charging and to the thermal oil boiler system.

[0112] Specifically, the hybrid energy storage controller is used to charge the electric energy storage system and store heat in the thermal oil furnace system based on the remaining energy when it is determined that the hybrid energy storage system is in a charging state and the remaining capacity is less than a first preset capacity; and to control the hybrid energy storage system to be in a floating charge state when it is determined that the hybrid energy storage system is in a charging state and the remaining capacity is greater than or equal to the first preset capacity.

[0113] The hybrid energy storage controller is configured to, when it is determined that the hybrid energy storage system is not in a charging state, determine the relationship between the remaining capacity and a second preset capacity; when it is determined that the remaining capacity is greater than the second preset capacity, control the electric energy storage system to discharge and / or release heat to the thermal oil boiler system; and when it is determined that the remaining capacity is less than or equal to the second preset capacity, control the electric energy storage system and the thermal oil boiler system to stop supplying energy and enter a standby state.

[0114] Specifically, through Figure 3 The control process of the hybrid energy storage controller is schematically described as follows:

[0115] Step 301 , determining whether the hybrid energy storage system is in a charging state, if so, executing step 302 , otherwise executing step 305 .

[0116] Step 302: Use the remaining energy to charge the battery of the electric energy storage system and energize the electric heater of the thermal oil furnace system to heat the thermal oil for thermal energy storage.

[0117] Step 303 , determining whether the remaining capacity is less than the first preset capacity, if so, executing step 302 , otherwise executing step 304 .

[0118] Step 304: Control the hybrid energy storage system to be in a floating charge state.

[0119] Step 305 , determining whether the remaining capacity is greater than a second preset capacity, if so, executing step 306 , otherwise, executing step 307 .

[0120] Step 306: Control the electric energy storage system to discharge and / or release heat to the thermal oil furnace system.

[0121] Step 307: Control the electric energy storage system and the thermal oil furnace system to stop supplying energy and enter a standby state.

[0122] Specifically, the hybrid energy storage controller is also used to control the electric energy storage system and the thermal oil furnace system to be in a charging state or a floating charging state when it is determined that the microgrid is stable.

[0123] Moreover, at this time, the battery cluster and energy storage converter combination can realize automatic charging and discharging operations according to the remaining power of its own battery.

[0124] Next, through Figure 4 The hybrid energy storage system of this application is specifically illustrated:

[0125] The thermal oil furnace system is illustrated as including a thermal oil storage tank 401 , an electric heater 402 , an electric heater power supply 403 and a heat exchanger 404 .

[0126] Take the energy storage system including the energy storage converter 405 and the battery cluster 406 as an example. Figure 4 In the figure, two groups of energy storage converters 405 and battery clusters 406 are used as an example for illustration, which is only for illustration and is not intended to limit the scope of protection of the present application.

[0127] The DC bus 407 is illustrated by a thick line.

[0128] In addition, the energy storage converter 405 is connected to the battery cluster 406 via an on / off switch 408 , the energy storage converter 406 is connected to the DC bus 407 via an on / off switch 408 , and the electric heater power supply 409 is connected to the DC bus 407 via an on / off switch 408 .

[0129] The hybrid energy storage controller is connected to each energy storage converter 405 (in Figure 4 For the sake of clarity in the drawings, only one energy storage converter 405 is shown as a connection diagram), the hybrid energy storage controller is connected to the electric heater 402 , and the hybrid energy storage controller is connected to the heat exchanger 404 .

[0130] In addition, the DC bus 407 is connected to the energy supply system via a circuit breaker, and the hybrid energy storage controller is connected to the circuit breaker, and connection or disconnection with the energy supply system is achieved by controlling the on and off of the circuit breaker.

[0131] This application addresses the existing problems of poor stability and energy utilization in microgrids powered by renewable energy, improving their stability and energy utilization. It can also simultaneously meet both heating and power supply needs, achieving peak load regulation and grid stabilization. The output of both electrical and thermal energy can meet the needs of multiple scenarios.

[0132] This application utilizes surplus energy to improve energy utilization, storing it as both electrical and thermal energy, and increasing storage diversity. Furthermore, by leveraging the characteristics of electrical and thermal energy, performance complementarity is achieved. For example, batteries are suitable for fast-response scenarios but have a short energy storage time, while thermal oil boilers have a longer energy storage time. By leveraging their respective characteristics, the hybrid energy storage system achieves an optimal balance between power output, response speed, and energy storage capacity.

[0133] In addition, hybrid energy storage systems can optimize work distribution and reduce dependence on single energy storage components. In particular, they can reduce the number of battery charge and discharge cycles and significantly increase battery life.

[0134] The present application also provides an off-grid well site combined heat and power supply method, which is applied to the off-grid well site combined heat and power supply system described in any of the above embodiments. The repetitive parts will not be repeated. Figure 5 As shown, the method includes:

[0135] Step 501 : When it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load of the microgrid.

[0136] Step 502 : When it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand, the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system are controlled to provide energy for the load.

[0137] Step 503 : When it is determined that the hybrid energy storage system, the photovoltaic power generation system, and the wind power generation system cannot meet the load demand, the target system is controlled to provide energy for the load of the microgrid.

[0138] Among them, the target systems include: photovoltaic power generation system, wind power generation system and fuel power generation system, as well as hybrid energy storage system, photovoltaic power generation system, wind power generation system and fuel power generation system.

[0139] The load is a device used for extracting energy in a microgrid corresponding to the well site.

[0140] In a specific embodiment, when it is determined that the current operating mode is the first operating mode and the systems in operation are a photovoltaic power generation system and a wind power generation system, the first output power corresponding to the photovoltaic power generation system, the second output power and the remaining capacity of the wind power generation system are obtained; based on the first output power, the second output power, the remaining capacity and the load power, the operating status of the photovoltaic power generation system, the wind power generation system and the hybrid energy storage system are controlled.

[0141] Among them, the systems corresponding to the first operating mode include: photovoltaic power generation system, wind power generation system and hybrid energy storage system.

[0142] In a specific embodiment, when it is determined that the power sum of the first output power and the second output power is greater than the load power and the remaining capacity is greater than or equal to the first preset capacity, the first output power is adjusted so that the adjusted first output power and the second output power are equal to the load power; when it is determined that the power sum of the first output power and the second output power is greater than the load power and the remaining capacity is less than the first preset capacity, the remaining energy is used to provide energy to the hybrid energy storage system; when it is determined that the first output power and the second output power are less than the load power, the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system are controlled to provide energy to the load.

[0143] In a specific embodiment, when it is determined that the current operating mode is the first operating mode and the operating systems are a hybrid energy storage system, a photovoltaic power generation system, and a wind power generation system, the remaining capacity is obtained; when it is determined that the remaining capacity is less than the second preset capacity, the current operating mode is adjusted to the second operating mode.

[0144] Among them, the systems corresponding to the second operating module include: photovoltaic power generation system, wind power generation system, hybrid energy storage system and fuel power generation system.

[0145] In a specific embodiment, when it is determined that the current operating mode is the second operating mode, the remaining capacity of the hybrid energy storage system and the power sum of the first output power and the second output power are obtained in real time; when it is determined that the remaining capacity is greater than or equal to the first preset capacity, and / or the power sum is greater than or equal to the load power, the current operating mode is adjusted to the first operating mode.

[0146] In a specific embodiment, when the combined heat and power generation system is started, the electric energy storage system is started to power the microgrid, and the photovoltaic power generation system and the wind power generation system are started; the sub-residual capacity of the electric energy storage system is obtained; and based on the sub-residual capacity and load demand, the output power of the photovoltaic power generation system and the wind power generation system is adjusted.

[0147] In a specific embodiment, the operating parameters of each system in operation in the combined heat and power system and the operating parameters of the load are obtained; the consistency of the operating parameters and the preset operating parameters are compared; if any one or more of the inconsistency between the operating parameters and the preset operating parameters and the inconsistency between the operating parameters and the preset operating parameters are determined to be true, the microgrid is determined to be unstable; and based on a first parameter difference between the operating parameters and the preset operating parameters, and / or a second parameter difference between the operating parameters and the preset operating parameters, the hybrid energy storage system is controlled to perform charging and discharging operations to adjust the stability of the microgrid.

[0148] In a specific embodiment, the electric energy storage system is controlled to perform charging and discharging operations, and / or the thermal oil furnace system is controlled to enter a state of external heat release, so as to adjust the stability of the microgrid and the normal operation of the load.

[0149] Finally, it should be noted that the above are only preferred embodiments of the present application and the present application is not limited to the above embodiments. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present application should be considered to be included in the scope of protection of the present application.

Claims

1. An off-grid well site combined heat and power system, characterized in that: The combined heat and power system includes: a hybrid energy storage system, multiple power supply systems and a microgrid controller; The hybrid energy storage system includes: an electric energy storage system and a thermal oil furnace system; The plurality of power supply systems include: a photovoltaic power generation system, a wind power generation system, and a fuel power generation system; The hybrid energy storage system stores energy through the surplus energy corresponding to the photovoltaic power generation system and the wind power generation system, where the surplus energy is the excess energy when the photovoltaic power generation system and the wind power generation system meet the load demand corresponding to the load of the microgrid; The hybrid energy storage system and the power supply system are connected to the microgrid via a bus, and the hybrid energy storage system and the power supply system are respectively communicatively connected to the microgrid controller; The microgrid controller is configured to, when it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand, control the photovoltaic power generation system and the wind power generation system to provide energy for the load of the microgrid; when it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand, control the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system to provide energy for the load; when it is determined that the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system cannot meet the load demand, control the target system to provide energy for the load of the microgrid; Wherein, the target system includes: the photovoltaic power generation system, the wind power generation system and the fuel power generation system, or the hybrid energy storage system, the photovoltaic power generation system, the wind power generation system and the fuel power generation system; Wherein, the load is a device for extracting energy in a microgrid corresponding to the well site; The thermal oil furnace system includes a thermal oil storage tank, an electric heater, and a heat exchanger. When heat storage is required, the electric heater heats the thermal oil in the storage tank and stores it for insulation. When heat release is required, the heated thermal oil passes through the pipeline and then through the heat exchanger to heat the external medium. When the load type is a thermal load, the thermal oil furnace system is controlled to enter a heat release state based on the stability demand parameter and the load demand parameter; when the load type is an electrical load, the electric energy storage system is controlled to perform charging and discharging operations based on the stability demand parameter and the load demand parameter; when the load type is a comprehensive load, the electric energy storage system is controlled to perform charging and discharging operations, and / or the thermal oil furnace system is controlled to enter a heat release state; The load demand includes: required power; the microgrid controller is configured to obtain operating parameters of each system in operation in the combined heat and power supply system, energy supply parameters of each system not in operation, the required power, and a current operating mode of the combined heat and power supply system; and adjust the operating mode of the combined heat and power supply system or the operating state of each system in the combined heat and power supply system based on the operating parameters, the energy supply parameters, the required power, and the current operating mode. The operating parameters include: output power; the energy supply parameters include: the remaining capacity of the hybrid energy storage system; the microgrid controller is used to obtain the first output power corresponding to the photovoltaic power generation system, the second output power of the wind power generation system and the remaining capacity when it is determined that the current operating mode is the first operating mode and the operating systems are the photovoltaic power generation system and the wind power generation system; based on the first output power, the second output power, the remaining capacity and the load power, control the operating states of the photovoltaic power generation system, the wind power generation system and the hybrid energy storage system; wherein the systems corresponding to the first operating mode include: the photovoltaic power generation system, the wind power generation system and the hybrid energy storage system; The microgrid controller is configured to, when it is determined that the sum of the first output power and the second output power is greater than the load power and the remaining capacity is greater than or equal to a first preset capacity, adjust the first output power so that the adjusted first output power and the second output power are equal to the load power; when it is determined that the sum of the first output power and the second output power is greater than the load power and the remaining capacity is less than the first preset capacity, use the remaining energy to provide energy to the hybrid energy storage system; when it is determined that the first output power and the second output power are less than the load power, control the hybrid energy storage system, the photovoltaic power generation system, and the wind power generation system to provide energy to the load; The microgrid controller is configured to obtain the remaining capacity when it is determined that the current operating mode is the first operating mode and the operating systems are the hybrid energy storage system, the photovoltaic power generation system, and the wind power generation system; and adjust the current operating mode to the second operating mode when it is determined that the remaining capacity is less than a second preset capacity; wherein the systems corresponding to the second operating module include: the photovoltaic power generation system, the wind power generation system, the hybrid energy storage system, and the fuel power generation system.

2. The off-grid well site combined heat and power system according to claim 1, characterized in that: The microgrid controller is configured to, when determining that the current operating mode is the second operating mode, obtain in real time the remaining capacity of the hybrid energy storage system and the power sum of the first output power and the second output power; and adjust the current operating mode to the first operating mode when determining that the remaining capacity is greater than or equal to the first preset capacity and / or the power sum is greater than or equal to the load power.

3. The off-grid well site combined heat and power system according to any one of claims 1-2, characterized in that: The microgrid controller is configured to, when the combined heat and power generation system is started, start the electric energy storage system to power the microgrid, start the photovoltaic power generation system and the wind power generation system; obtain the sub-residual capacity of the electric energy storage system; and adjust the output power of the photovoltaic power generation system and the wind power generation system based on the sub-residual capacity and the load demand.

4. The off-grid well site combined heat and power system according to any one of claims 1-2, characterized in that: The microgrid controller is further configured to obtain operating parameters of each system in operation in the combined heat and power system and operating parameters of the load; compare the consistency of the operating parameters with preset operating parameters, and the consistency of the operating parameters with preset operating parameters; and determine that the microgrid is unstable when any one or more of the following is true: the operating parameters are inconsistent with the preset operating parameters and the operating parameters are inconsistent with the preset operating parameters; Based on a first parameter difference between the operating parameter and the preset operating parameter, and / or a second parameter difference between the operating parameter and the preset operating parameter, the hybrid energy storage system is controlled to perform charging and discharging operations to adjust the stability of the microgrid.

5. The off-grid well site combined heat and power system according to claim 4, characterized in that: The microgrid controller is further used to control the electric energy storage system to perform charging and discharging operations, and / or control the thermal oil furnace system to enter a state of external heat release, so as to adjust the stability of the microgrid and the normal operation of the load.

6. A method for combined heat and power supply at an off-grid well site, characterized in that: The method applied to the off-grid well site combined heat and power system according to any one of claims 1 to 5 comprises: When it is determined that the photovoltaic power generation system and the wind power generation system can meet the load demand, controlling the photovoltaic power generation system and the wind power generation system to provide energy for the load of the microgrid; When it is determined that the photovoltaic power generation system and the wind power generation system cannot meet the load demand, controlling the hybrid energy storage system, the photovoltaic power generation system and the wind power generation system to provide energy for the load; When it is determined that the hybrid energy storage system, the photovoltaic power generation system, and the wind power generation system cannot meet the load demand, controlling the target system to provide energy for the load of the microgrid; Wherein, the target system includes: the photovoltaic power generation system, the wind power generation system and the fuel power generation system, or the hybrid energy storage system, the photovoltaic power generation system, the wind power generation system and the fuel power generation system; The load is a device used for extracting energy in a microgrid corresponding to the well site.

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