Oilfield microgrid operation control method and device

Abstract

The application discloses an oil field micro-grid operation control method and device, which can be used in the technical field of micro-grid control, and comprises the following steps: collecting operation data of a target power generation unit of an oil field micro-grid, calculating the output power of the target power generation unit according to the operation data of the target power generation unit of the micro-grid, calculating the net load power of the micro-grid according to the output power of the target power generation unit, obtaining the state of charge of energy storage of the micro-grid, comparing the size relationship between the net load power and the maximum discharge power of the energy storage, determining the working condition of the micro-grid according to the state of charge and the comparison result, and distributing the output of each unit in the micro-grid according to the working condition of the micro-grid. The application can reduce the influence of wind and light power generation volatility on the oil field load and improve the operation stability of the micro-grid.

Description

Technical Field

[0001] This invention relates to the field of microgrid control technology, and in particular to a method and device for operating and controlling oilfield microgrids. Background Technology

[0002] This section is intended to provide background or context for embodiments of the present invention. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0003] With the increasing number of new energy power plants in oilfield areas, a multi-energy utilization system has been formed, integrating new energy sources such as wind and solar power with conventional energy sources such as oil and gas. Research on coordinated operation and control methods for energy resources is crucial for achieving energy interconnection in oilfields, given the increase in new energy power plants.

[0004] With the construction of new power plants such as wind and solar power generation and the development of micro-source power operation and control technology, microgrids are attracting increasing attention in the power industry. However, output fluctuations of distributed power plants and other external interferences directly affect the stability of microgrids. Most power sources in microgrids are distributed power sources and energy storage devices connected by power electronic devices. Traditional microgrid control relies solely on power source control, making it difficult to guarantee operational stability. From a power consumption perspective, loads, as terminal equipment of the power system, have frequency characteristics opposite to those of gas turbines and various power sources. If flexible and controllable loads participate in frequency regulation, it will be more beneficial to the operational stability of microgrids. However, most controllable loads are subject to tiered regulation and cannot achieve stepless smooth regulation. Currently, there are no corresponding smooth regulation strategies for loads that can participate in flexible regulation.

[0005] From an energy perspective, the diversity of power sources in oilfield microgrids, along with their flexible network structure and operation, promotes the coupling of electricity, heat, oil, gas, and other energy sources, with electricity and heat being the most widely utilized. As microgrids continue to be built, the coupling between electricity and heat will further increase. While current energy control primarily focuses on optimizing energy application scheduling, and although a multi-energy supply pattern has been established in oilfields, the coordinated control technology between electricity and other energy sources still requires further research. Summary of the Invention

[0006] This invention provides a method for operating and controlling an oilfield microgrid, which aims to achieve smooth regulation of the microgrid and improve its operational stability. The method includes:

[0007] Collect operational data of the target power generation unit in the oilfield microgrid, and calculate the output power of the target power generation unit based on the operational data of the target power generation unit in the microgrid;

[0008] Calculate the net load power of the microgrid based on the output power of the target power generation unit;

[0009] Obtain the state of charge (SOC) of the microgrid energy storage, compare the net load power with the maximum discharge power of the energy storage, and determine the microgrid operating conditions based on the SOC and the comparison results.

[0010] The output of each unit in the microgrid is allocated according to the microgrid's operating conditions.

[0011] This invention also provides an oilfield microgrid operation control device to achieve smooth microgrid regulation and improve microgrid operation stability. The device includes:

[0012] The output power calculation module is used to collect the operating data of the target power generation unit of the oilfield microgrid and calculate the output power of the target power generation unit based on the operating data of the target power generation unit of the microgrid.

[0013] The net load power calculation module is used to calculate the microgrid net load power based on the output power of the target power generation unit.

[0014] The operating condition determination module is used to obtain the state of charge of the microgrid energy storage, compare the net load power with the maximum discharge power of the energy storage, and determine the microgrid operating condition based on the state of charge and the comparison results.

[0015] The microgrid control module is used to allocate the power output of each unit in the microgrid according to the microgrid's operating conditions.

[0016] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described oilfield microgrid operation control method.

[0017] This invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described oilfield microgrid operation control method.

[0018] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described oilfield microgrid operation control method.

[0019] In this embodiment of the invention, operational data of the target power generation unit of the oilfield microgrid is collected, and the output power of the target power generation unit is calculated based on the operational data. The net load power of the microgrid is then calculated based on the output power of the target power generation unit. The state of charge (SBC) of the microgrid energy storage is obtained, and the relationship between the net load power and the maximum discharge power of the energy storage is compared. Based on the SBC and the comparison results, the microgrid operating condition is determined. The output of each unit in the microgrid is then allocated according to the microgrid operating condition. In this way, by obtaining the microgrid's net load and SBC to determine the microgrid operating condition, and then allocating processing power to each unit in the microgrid according to different operating conditions, smooth microgrid regulation is achieved, effectively improving the operational stability of the microgrid. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a flowchart of the oilfield microgrid operation control method provided in the embodiments of the present invention;

[0022] Figure 2 This is a schematic diagram of the operating conditions of an oilfield microgrid provided in an embodiment of the present invention;

[0023] Figure 3 This is a topology diagram of an oilfield microgrid system provided in an embodiment of the present invention;

[0024] Figure 4 This is a diagram illustrating an example of operating condition 1 provided in this embodiment of the invention.

[0025] Figure 5 This is a diagram illustrating an example of operating condition 2 provided in this embodiment of the invention.

[0026] Figure 6 This is an example diagram of operating condition 3 provided in the embodiments of the present invention;

[0027] Figure 7 This is an example diagram of operating condition 4 provided in the embodiments of the present invention;

[0028] Figure 8 This is a diagram illustrating an example of operating condition 5 provided in this embodiment of the invention.

[0029] Figure 9 This is a schematic diagram of the oilfield microgrid operation control device provided in an embodiment of the present invention;

[0030] Figure 10This is a structural block diagram of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0032] In this document, the term "and / or" merely describes a relationship, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0033] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0034] Currently, research on the operation strategies of independent wind-solar-gas-storage microgrids can be broadly categorized into two types based on the priority of tracking net load (net load refers to the difference between the load demand and the output power of wind and solar power): Type 1: Gas turbines prioritize tracking net load, with energy storage primarily used for regulating system power balance. This type of operation strategy requires a smaller energy storage capacity, mainly due to the high cost of energy storage. It also necessitates the simultaneous deployment of larger-capacity gas turbines, resulting in relatively higher emissions. Type 2: Energy storage prioritizes tracking net load while minimizing gas turbine power generation, thus improving the utilization rate of renewable energy and reducing environmental pollution. With decreasing energy storage prices and increasingly stringent environmental requirements, Type 2 operation strategies are gradually becoming the mainstream.

[0035] Existing technologies, based on the analysis of the economics of gas turbine and energy storage power generation, have formulated power operation strategies for microgrids. With optimizing the overall cost of the microgrid as the objective function, the design of the operation strategy emphasizes environmental protection requirements, with limiting gas turbine operation being one of the core considerations. Based on the analysis of the power operation characteristics of gas turbines and energy storage, 24 microgrid operation modes are summarized through combination screening of gas turbine and energy storage operation modes. Combined with engineering practice, the operation strategy problem of capacity optimization configuration for independent microgrids is reviewed and summarized, ultimately identifying 6 typical modes. The design of the operation strategy is closer to engineering practice in detail, adding a lower limit for energy storage charging and discharging power. It can be seen that research on the operation strategy problem of microgrid capacity optimization configuration shows a trend of considering more factors and becoming closer to engineering practice.

[0036] Based on this, embodiments of the present invention provide an operation control method for oilfield microgrids, such as... Figure 1 As shown, it includes:

[0037] Step 101: Collect the operating data of the target power generation unit of the oilfield microgrid, and calculate the output power of the target power generation unit based on the operating data of the target power generation unit of the microgrid;

[0038] Step 102: Calculate the net load power of the microgrid based on the output power of the target power generation unit;

[0039] Step 103: Obtain the state of charge of the microgrid energy storage, compare the net load power with the maximum discharge power of the energy storage, and determine the microgrid operating condition based on the state of charge and the comparison results;

[0040] Step 104: Allocate the power output of each unit in the microgrid according to the microgrid operating conditions.

[0041] This invention proposes an oilfield microgrid operation control method. Taking a typical oilfield microgrid comprising wind power, photovoltaics, gas turbines, energy storage, and loads as the research object, it addresses the stable operation control problem of oilfield microgrids with multiple independent units including renewable energy, energy storage, gas turbines, and loads. By classifying and summarizing the operating conditions of the oilfield microgrid, five operating conditions are categorized based on the state of charge (SOC) of the energy storage batteries and the net load power. Based on these five operating conditions, a coordinated operation control method for oilfield microgrids under various different conditions is proposed. The following section describes the construction of an oilfield microgrid simulation model incorporating wind, solar, gas, and energy storage using an electromagnetic transient simulation software platform. Simulation verification of the proposed coordinated control method for wind-solar-gas-energy-storage oilfield microgrid is conducted. The results show that the microgrid can operate stably under the proposed control strategy, demonstrating good practical engineering application value.

[0042] In one embodiment, the target power generation unit of the microgrid includes wind turbines and photovoltaics.

[0043] In one embodiment, collecting operational data of a target power generation unit in an oilfield microgrid and calculating the output power of the target power generation unit based on the operational data includes:

[0044] Collect wind speed and irradiance data for the area where the oilfield microgrid is located;

[0045] The output power of the wind turbine is calculated based on wind speed, and the output power of the photovoltaic system is calculated based on irradiance.

[0046] In practice, the output power P of the fan is calculated based on wind speed and irradiance. WT and photovoltaic output power P PV。

[0047] In one embodiment, calculating the net load power of the microgrid based on the output power of the target power generation unit includes:

[0048] Collect the total load power of the microgrid;

[0049] Calculate the net load power of the microgrid based on the total load power of the microgrid, the output power of the wind turbine, and the output power of the photovoltaic system.

[0050] In practical implementation, the net load ΔP is calculated. L =P L -P WT -P PV .

[0051] In one embodiment, the relationship between net load power and maximum energy storage discharge power is compared, and the microgrid operating condition is determined based on the state of charge and the comparison results, including:

[0052] Determine the level corresponding to the state of charge; different levels correspond to different ranges of states of charge.

[0053] Determine whether the net load power is less than the maximum discharge power of the energy storage;

[0054] The microgrid operating condition is determined based on the judgment results and the corresponding level of the state of charge.

[0055] In specific implementation, based on the net load ΔP L The operating conditions of the oilfield microgrid are determined by the State of Charge (SOC) of the energy storage.

[0056] In one embodiment, the microgrid operating condition is determined based on the judgment result and the level corresponding to the state of charge, including:

[0057] When the state of charge is at level one and the net load power is less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines and photovoltaics operate at maximum power, the energy storage does not operate, and the gas turbine tracks the load power.

[0058] When the state of charge is at level 2 and the net load power is less than the maximum discharge power of the energy storage, the microgrid operates at the maximum power of the wind turbine and photovoltaic system, while the energy storage and gas turbine track the net load power together.

[0059] When the state of charge is at level three and the net load power is less than the maximum discharge power of the energy storage, the wind turbine and photovoltaic power of the microgrid will operate at maximum power, the gas turbine will not start, and the energy storage will track the net load power.

[0060] When the state of charge is at level one and the net load power is not less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbine, photovoltaic and gas turbine operate at maximum power and the energy storage tracks the load power.

[0061] When the state of charge is at level 2 and the net load power is not less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines, photovoltaics, energy storage and gas turbines all operate at maximum power, and some loads are cut off;

[0062] When the state of charge is at level three and the net power is not less than the maximum discharge power of the energy storage, the microgrid operates with wind turbines, photovoltaics, energy storage, and gas turbines all running at maximum power, and some loads are cut off.

[0063] In practice, the State of Charge (SOC) is first determined, and then the net load power is compared with the maximum discharge power of the energy storage.

[0064] When the SOC is between 80% and 100% (Level 3), determine whether the net load power is less than the maximum energy storage discharge power P. BES，Max If yes, proceed to condition 3; otherwise, proceed to condition 4.

[0065] When the SOC is between 0% and 20% (Level 1), determine whether the net load power is less than the maximum energy storage discharge power P. BES，Max If yes, proceed to condition 1; otherwise, proceed to condition 5.

[0066] When the SOC is between 20% and 80% (Level 2), determine whether the net load power is less than the maximum energy storage discharge power P. BES，Max If yes, proceed to operating condition 2; otherwise, proceed to operating condition 4.

[0067] In one embodiment, allocating the power output of each unit in the microgrid according to the microgrid's operating conditions includes:

[0068] According to the microgrid operating conditions, the output power of each unit of the microgrid is adjusted in a preset manner. The microgrid units include: wind turbines, photovoltaics, energy storage, and gas turbines.

[0069] In practice, the output of wind power, photovoltaic power, energy storage, and gas turbines is allocated according to different operating conditions. The specific allocation of wind power, photovoltaic power, energy storage, and gas turbine output according to different operating conditions is as follows: Figure 2 As shown.

[0070] In one embodiment, after distributing the output of each unit in the microgrid according to the microgrid operating conditions, it further includes:

[0071] After re-collecting the operation data of the target power generation unit of the oilfield microgrid and the state of charge of the microgrid energy storage, update the microgrid net load power and the state of charge;

[0072] Based on the updated microgrid net load power and the state of charge, determine the microgrid operating conditions and distribute the output of each unit in the microgrid.

[0073] In specific implementation, recalculate the net load power according to the output of each unit of wind, light, gas, and storage, update the SOC, and prepare for the next cycle.

[0074] For example, Figure 3 is a topological schematic diagram of a wind-light-gas-storage microgrid, which is verified on a simulation platform. The main parameters of the simulation experiment are shown in Table 1.

[0075] Table 1 Main parameters of the simulation experiment

[0076] parameter Value Fan capacity 10MW Fan voltage level 690V Wind power transformer T1 turns ratio 0.69 / 35kV Photovoltaic capacity 20MW Photovoltaic voltage level 800V Photovoltaic transformer T3 turns ratio 0.8 / 35kV Energy storage capacity 30MW Energy storage voltage level 690V Energy storage transformer T2 turns ratio 0.69 / 35kV Gas turbine capacity 2*15MW Gas turbine voltage level 10kV Gas turbine transformer T5 turns ratio 10 / 35kV Electrical load 14MW Load voltage level 35kV <![CDATA[The maximum discharge power P of energy storage BES，Max > 30MW

[0077] Refer to Figure 4 , the current total load is 14 MW, the SOC of the energy storage battery is between 0 and 20%, the measured wind speed is 10 m / s, and the irradiance is 250 W / m2. At this time, the active power outputs of the wind turbine and the photovoltaic are approximately 6 MW and 5 MW respectively. The system net load ΔPL = PL - PWT - PPV = 14 - 6 - 5 = 3 MW < PBES, Max. From Figure 4 it can be obtained that the oilfield microgrid is in the operating state of condition 1. At this time, both the wind turbine and the photovoltaic are operating at maximum power, the energy storage does not output power, and the gas turbine starts to track the load, and the output of the gas turbine is 3 MW.

[0078] Refer to Figure 5 , the current total load is 14 MW, the SOC of the energy storage battery is between 20% and 80%, the measured wind speed is 7 m / s, and the irradiance is approximately 0. At this time, the active power outputs of the wind turbine and the photovoltaic are approximately 2 MW and 0 MW respectively. The system net load ΔPL = PL - PWT - PPV = 14 - 2 - 0 = 12 MW < PBES, Max. From Figure 5 it can be obtained that the oilfield microgrid is in the operating state of condition 2. At this time, both the wind turbine and the photovoltaic are operating at maximum power, the energy storage and the gas turbine jointly track the net load, the output of the gas turbine is 7.5 MW, and the output of the energy storage is 4 MW.

[0079] Refer to Figure 6, the current total load is 14 MW, the measured wind speed is 8 m / s, the irradiance is about 250 W / m2, and the SOC of the energy storage battery is between 80% and 100%. At this time, the active power outputs of the wind turbine and the photovoltaic are about 4.5 MW and 5 MW respectively, and the system net load ΔPL = PL - PWT - PPV = 14 - 4.5 - 5 = 4.5 MW < PBES, Max. From Figure 6 It can be obtained that the oilfield microgrid is in the operating state of condition 3. At this time, both the wind turbine and the photovoltaic are operating at maximum power. Considering economy, the gas turbine does not start, and the energy storage tracks the net load. At this time, the energy storage outputs 4 MW.

[0080] Refer to Figure 7 , the current total load is 45 MW, the SOC of the energy storage battery is between 20% and 100%, the measured wind speed is 7 m / s, and the irradiance is about 0. At this time, the active power outputs of the wind turbine and the photovoltaic are about 2 MW and 0 MW respectively, and the system net load ΔPL = PL - PWT - PPV = 45 - 2 - 0 = 43 MW > PBES, Max. From Figure 7 It can be obtained that the oilfield microgrid is in the operating state of condition 4. At this time, the wind turbine, the photovoltaic, the energy storage, and the gas turbine are all operating at maximum power. The energy storage outputs 30 MW and the gas turbine outputs 8 MW of active power. In order to ensure the system power balance, the redundant active load is cut off at this time.

[0081] Refer to Figure 8 , the current total load is 43 MW, the SOC of the energy storage battery is between 0 and 20%, the measured wind speed is 7 m / s, and the irradiance is about 100 W / m2. At this time, the total active power output of the wind turbine and the photovoltaic is about 4 MW, and the system net load ΔPL = PL - PWT - PPV = 43 - 4 = 39 MW > PBES, Max. From Figure 8 It can be obtained that the oilfield microgrid is in the operating state of condition 5. At this time, the wind turbine, the photovoltaic, and the gas turbine are all operating at maximum power. The gas turbine outputs about 9 MW of active power, and the energy storage tracks the net load and outputs 30 MW of active power.

[0082] In the embodiment of the present invention, an oilfield microgrid operation control device is further provided, as described in the following embodiments. Since the principle of the device to solve the problem is similar to the oilfield microgrid operation control method, the implementation of the device can refer to the implementation of the oilfield microgrid operation control method, and the repeated parts will not be described again.

[0083] Figure 9 is a schematic diagram of the oilfield microgrid operation control device provided in the embodiment of the present invention, as Figure 9 shown. The device includes:

[0084] An output power calculation module 901, configured to collect the operation data of the target power generation unit of the oilfield microgrid, and calculate the output power of the target power generation unit according to the operation data of the target power generation unit of the microgrid;

[0085] Net load power calculation module 902 is used to calculate the net load power of the microgrid based on the output power of the target power generation unit;

[0086] The operating condition determination module 903 is used to obtain the state of charge of the microgrid energy storage, compare the net load power with the maximum discharge power of the energy storage, and determine the microgrid operating condition based on the state of charge and the comparison results.

[0087] The microgrid control module 904 is used to allocate the power output of each unit in the microgrid according to the microgrid operating conditions.

[0088] In one embodiment, the target power generation unit of the microgrid includes wind turbines and photovoltaics.

[0089] In one embodiment, the output power calculation module 901 is specifically used for:

[0090] Collect wind speed and irradiance data for the area where the oilfield microgrid is located;

[0091] Calculate the wind turbine output power based on wind speed, and calculate the photovoltaic output power based on irradiance.

[0092] In one embodiment, the net load power calculation module 902 is specifically used for:

[0093] Collect the total load power of the microgrid;

[0094] Calculate the net load power of the microgrid based on the total load power of the microgrid, the output power of the wind turbine, and the output power of the photovoltaic system.

[0095] In one embodiment, the operating condition determination module 903 is specifically used for:

[0096] Determine the level corresponding to the state of charge; different levels correspond to different ranges of states of charge.

[0097] Determine whether the net load power is less than the maximum discharge power of the energy storage;

[0098] The microgrid operating condition is determined based on the judgment results and the corresponding level of the state of charge.

[0099] In one embodiment, the operating condition determination module 903 is specifically used for:

[0100] When the state of charge is at level one and the net load power is less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines and photovoltaics operate at maximum power, the energy storage does not operate, and the gas turbine tracks the load power.

[0101] When the state of charge is at level 2 and the net load power is less than the maximum discharge power of the energy storage, the microgrid operates at the maximum power of the wind turbine and photovoltaic system, while the energy storage and gas turbine track the net load power together.

[0102] When the state of charge is at level three and the net load power is less than the maximum discharge power of the energy storage, the wind turbine and photovoltaic power of the microgrid will operate at maximum power, the gas turbine will not start, and the energy storage will track the net load power.

[0103] When the state of charge is at level one and the net load power is not less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbine, photovoltaic and gas turbine operate at maximum power and the energy storage tracks the load power.

[0104] When the state of charge is at level 2 and the net load power is not less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines, photovoltaics, energy storage and gas turbines all operate at maximum power, and some loads are cut off;

[0105] When the state of charge is at level three and the net power is not less than the maximum discharge power of the energy storage, the microgrid operates with wind turbines, photovoltaics, energy storage, and gas turbines all running at maximum power, and some loads are cut off.

[0106] In one embodiment, the microgrid control module 904 is specifically used for:

[0107] According to the microgrid operating conditions, the output power of each unit of the microgrid is adjusted in a preset manner. The microgrid units include: wind turbines, photovoltaics, energy storage, and gas turbines.

[0108] In one embodiment, an update module is further included, specifically for:

[0109] After re-collecting the operating data of the target power generation unit of the oilfield microgrid and the state of charge of the microgrid energy storage, the net load power and state of charge of the microgrid are updated.

[0110] Based on the updated net load power and state of charge of the microgrid, the operating conditions of the microgrid are determined, and the output of each unit in the microgrid is allocated.

[0111] Based on the aforementioned inventive concept, such as Figure 10 As shown, the present invention also proposes a computer device 1000, including a memory 1010, a processor 1020, and a computer program 1030 stored in the memory 1010 and executable on the processor 1020. When the processor 1020 executes the computer program 1030, it implements the aforementioned oilfield microgrid operation control method.

[0112] This invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-described oilfield microgrid operation control method.

[0113] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described oilfield microgrid operation control method.

[0114] In summary, in this embodiment of the invention, operational data of the target power generation unit of the oilfield microgrid is collected; the output power of the target power generation unit is calculated based on the operational data; the net load of the microgrid is calculated based on the output power of the target power generation unit; the state of charge (SBC) of the microgrid energy storage is obtained; the relationship between the net load and the maximum discharge power of the energy storage is compared; and the microgrid operating condition is determined based on the SBC and the comparison results; the output of each unit in the microgrid is allocated according to the microgrid operating condition. Thus, by obtaining the microgrid's net load and SBC to determine the microgrid operating condition, and then allocating processing power to each unit in the microgrid according to different microgrid operating conditions, smooth regulation of the microgrid is achieved, effectively improving the operational stability of the microgrid.

[0115] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0116] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0117] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0118] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0119] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for operation control of an oilfield microgrid, characterized in that, include: Collect operational data of the target power generation unit in the oilfield microgrid, and calculate the output power of the target power generation unit based on the operational data of the target power generation unit in the microgrid; Calculate the net load power of the microgrid based on the output power of the target power generation unit; Obtain the state of charge (SOC) of the microgrid energy storage, compare the net load power with the maximum discharge power of the energy storage, and determine the microgrid operating conditions based on the SOC and the comparison results. The output of each unit in the microgrid is allocated according to the microgrid's operating conditions.

2. The method as described in claim 1, characterized in that, The target power generation units for microgrids include wind turbines and photovoltaics.

3. The method as described in claim 2, characterized in that, Collect operational data of the target power generation unit in the oilfield microgrid, and calculate the output power of the target power generation unit based on the operational data, including: Collect wind speed and irradiance data for the area where the oilfield microgrid is located; The output power of the wind turbine is calculated based on wind speed, and the output power of the photovoltaic system is calculated based on irradiance.

4. The method as described in claim 3, characterized in that, The net load power of the microgrid is calculated based on the output power of the target power generation unit, including: Collect the total load power of the microgrid; Calculate the net load power of the microgrid based on the total load power of the microgrid, the output power of the wind turbine, and the output power of the photovoltaic system.

5. The method as described in claim 1, characterized in that, By comparing the net load power with the maximum discharge power of the energy storage, and based on the state of charge and the comparison results, the microgrid operating conditions are determined, including: Determine the level corresponding to the state of charge; different levels correspond to different ranges of states of charge. Determine whether the net load power is less than the maximum discharge power of the energy storage; The microgrid operating condition is determined based on the judgment results and the corresponding level of the state of charge.

6. The method as described in claim 5, characterized in that, Based on the judgment results and the corresponding state of charge level, the microgrid operating conditions are determined, including: When the state of charge is at level one and the net load power is less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines and photovoltaics operate at maximum power, the energy storage does not operate, and the gas turbine tracks the load power. When the state of charge is at level 2 and the net load power is less than the maximum discharge power of the energy storage, the microgrid operates at the maximum power of the wind turbine and photovoltaic power, and the energy storage and gas turbine track the net load power together. When the state of charge is at level three and the net load power is less than the maximum discharge power of the energy storage, the wind turbine and photovoltaic power of the microgrid will operate at maximum power, the gas turbine will not start, and the energy storage will track the net load power. When the state of charge is at level one and the net load power is not less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines, photovoltaics and gas turbines operate at maximum power and the energy storage tracks the load power. When the state of charge is at level 2 and the net load power is not less than the maximum discharge power of the energy storage, the microgrid operating condition is that the wind turbines, photovoltaics, energy storage and gas turbines all operate at maximum power, and some loads are cut off; When the state of charge is at level three and the net power is not less than the maximum discharge power of the energy storage, the microgrid operates with wind turbines, photovoltaics, energy storage, and gas turbines all running at maximum power, and some loads are cut off.

7. The method as described in claim 6, characterized in that, The power output of each unit in the microgrid is allocated according to the microgrid's operating conditions, including: According to the microgrid operating conditions, the output power of each unit of the microgrid is adjusted in a preset manner. The microgrid units include: wind turbines, photovoltaics, energy storage, and gas turbines.

8. The method as described in claim 1, characterized in that, After allocating the power output of each unit in the microgrid according to the microgrid's operating conditions, the following is also included: After re-collecting the operating data of the target power generation unit of the oilfield microgrid and the state of charge of the microgrid energy storage, the net load power and state of charge of the microgrid are updated. Based on the updated net load power and state of charge of the microgrid, the operating conditions of the microgrid are determined, and the output of each unit in the microgrid is allocated.

9. A microgrid operation control device for oil fields, characterized in that, include: The output power calculation module is used to collect the operating data of the target power generation unit of the oilfield microgrid and calculate the output power of the target power generation unit based on the operating data of the target power generation unit of the microgrid. The net load power calculation module is used to calculate the microgrid net load power based on the output power of the target power generation unit. The operating condition determination module is used to obtain the state of charge of the microgrid energy storage, compare the net load power with the maximum discharge power of the energy storage, and determine the microgrid operating condition based on the state of charge and the comparison results. The microgrid control module is used to allocate the power output of each unit in the microgrid according to the microgrid's operating conditions.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 8.

12. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 8.

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