Method, device and system for supplying power to well site of oil field and computer equipment

Abstract

The invention discloses a method, device and system for supplying power to a well site of an oil field and computer equipment. The method comprises the following steps: receiving an output current of at least one power generation device; determining the current type of the output current of the at least one power generation device; under the condition that the at least one power generation device comprises the first power generation device, the output current of the first power generation device is connected to a direct current bus of a well site of the target oil field, and the output current of the first power generation device is direct current; under the condition that the at least one power generation device comprises a second power generation device, the output current of the second power generation device is converted into direct current and then connected to the direct current bus, and the output current of the second power generation device is alternating current; and converting direct current output by the direct current bus into alternating current to supply power to target equipment. The technical problems of serious harmonic pollution and high system energy consumption caused by mainly adopting alternating current for power supply transmission are solved.

Description

Technical Field

[0001] The present invention relates to the field of surface engineering construction in oil and gas fields, and in particular to a method, a device, a system and a computer device for supplying power to a well site in an oil field. Background Art

[0002] At present, most oil fields adopt the "one transformer for multiple wells" power supply mode, in which the "one transformer for multiple wells" power supply mode refers to the power supply mode of branching the power supply line of a substation to multiple wellheads. This power supply mode has the following characteristics: 1) Each pumping unit is equipped with a wellhead control cabinet and a remote terminal unit, and the well site is equipped with a main distribution box, a well site remote terminal unit and a communication box, etc. The number of equipment is large and the equipment is installed in an open-air and scattered manner, which is not conducive to the centralized management of large well groups; 2) The power factor of the pumping unit is low. At present, the reactive power compensation of the well site is achieved by setting a centralized reactive power compensation device on the low-voltage side of the column transformer; 3) Due to the large apparent power of the pumping unit, the transformer capacity is also relatively large during the power distribution design; 4) The wellhead control cabinet of the pumping unit generates odd harmonics during operation, which has a certain impact on the power grid; 5) The pumping unit will have reverse power generation energy when it descends. The "one transformer for multiple wells" power supply mode cannot fully utilize the reverse power generation and energy feedback of the pumping unit, which is not conducive to energy saving.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a method, device, system and computer equipment for supplying power to a well site of an oil field, so as to at least solve the technical problems of serious harmonic pollution and high system energy consumption caused by mainly using alternating current for power transmission.

[0005] According to one aspect of an embodiment of the present invention, a method for supplying power to a well site of an oil field is provided, comprising: receiving an output current of at least one power generation device; determining a current type of the output current of at least one power generation device, wherein the current type comprises direct current and alternating current; when at least one power generation device comprises a first power generation device, connecting the output current of the first power generation device to a DC bus of a well site of a target oil field, wherein the output current of the first power generation device is direct current; when at least one power generation device comprises a second power generation device, converting the output current of the second power generation device to direct current and then connecting it to the DC bus, wherein the output current of the second power generation device is alternating current; converting the direct current outputted from the DC bus to alternating current to supply power to a target device, wherein the target device is a device related to oil production in the well site of the target oil field.

[0006] Optionally, connecting the output current of the first power generation device to the DC bus of the well site of the target oil field includes: obtaining the power demand of the target device; adjusting the output current of the first power generation device according to the power demand; and connecting the adjusted output current of the first power generation device to the DC bus.

[0007] Optionally, the output current of the first power generation device is adjusted according to the power demand, including: when the output current of the first power generation device meets the power demand, adjusting the first power generation device to output current at a constant voltage; and / or, when the output current of the first power generation device does not meet the power demand, adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output.

[0008] Optionally, in the case where at least one power generation device includes a first power generation device and a second power generation device, the output current of the second power generation device is converted into direct current and then connected to the DC bus, including: adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output, and connecting the adjusted output current of the first power generation device to the DC bus; obtaining the power demand of the target device; adjusting the output current of the second power generation device according to the adjusted output current and power demand of the first power generation device; and converting the adjusted output current of the second power generation device into direct current and then connecting to the DC bus.

[0009] Optionally, the output current of the second power generation device is adjusted according to the adjusted output current of the first power generation device and the power demand, including: when the adjusted output current of the first power generation device does not meet the power demand, adjusting the current output by the second power generation device so that the sum of the adjusted output current of the first power generation device and the adjusted output current of the second power generation device meets the power demand; and / or, when the adjusted output current of the first power generation device meets the power demand, disconnecting the second power generation device from the DC bus.

[0010] Optionally, when the adjusted output current of the first power generation device meets the power demand, it also includes: connecting the first power generation device and the second power generation device; converting the current in the adjusted output current of the first power generation device that exceeds the power demand into alternating current, and transmitting it to the second power generation device.

[0011] Optionally, it also includes: receiving reverse power generation energy generated by the target device, wherein the reverse power generation energy is electrical energy converted from kinetic energy when the target device is working; and inputting the reverse power generation energy into a DC bus.

[0012] According to another aspect of an embodiment of the present invention, there is also provided a device for supplying power to a well site of an oil field, comprising: a receiving module for receiving an output current of at least one power generation device; a determining module for determining a current type of the output current of at least one power generation device, wherein the current type comprises direct current and alternating current; a first access module for, when at least one power generation device comprises a first power generation device, connecting the output current of the first power generation device to a DC bus of a well site of a target oil field, wherein the output current of the first power generation device is direct current; a second access module for, when at least one power generation device comprises a second power generation device, converting the output current of the second power generation device into direct current and then connecting it to the DC bus, wherein the output current of the second power generation device is alternating current; and a power supply module for converting the direct current outputted from the DC bus into alternating current to supply power to a target device, wherein the target device is a device related to oil production in the well site of the target oil field.

[0013] According to another aspect of an embodiment of the present invention, a system for supplying power to a well site of an oil field is also provided, comprising: an AC power grid, for outputting AC power to supply power to a target device, wherein the target device is equipment related to oil production in the well site of the target oil field; a photovoltaic power generation unit, for outputting DC power to supply power to the target device; a bidirectional grid-connected converter, connected to the AC power grid, for adjusting the output current of the AC power grid, and for converting the output current of the AC power grid into DC power; a photovoltaic interface converter, connected to the photovoltaic power generation unit, for adjusting the output current of the photovoltaic power generation unit; a DC bus, connected to the bidirectional grid-connected converter and the photovoltaic interface converter, for transmitting the output current of the photovoltaic power generation unit, and / or the output current of the AC power grid converted into DC power; a load frequency converter, connected to the DC bus and the target device, for converting the DC power transmitted by the DC bus into AC power for input into the target device.

[0014] Optionally, in the case that the well site of the target oil field includes a plurality of target devices, it includes: a plurality of load frequency converters, and the plurality of load frequency converters correspond one-to-one to the plurality of target devices.

[0015] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any one of the above-mentioned methods for supplying power to a well site in an oil field.

[0016] According to another aspect of an embodiment of the present invention, a computer device is provided. The computer device includes a processor, and the processor is used to run a program. When the program is run, any one of the above methods for supplying power to a well site in an oil field is executed.

[0017] In an embodiment of the present invention, a DC transmission power supply method is adopted, by receiving the output current of at least one power generation device; determining the current type of the output current of at least one power generation device, wherein the current type includes direct current and alternating current; in the case where at least one power generation device includes a first power generation device, connecting the output current of the first power generation device to the DC bus of the well site of the target oil field, wherein the output current of the first power generation device is direct current; in the case where at least one power generation device includes a second power generation device, converting the output current of the second power generation device into direct current and then connecting it to the DC bus, wherein the output current of the second power generation device is alternating current; converting the direct current outputted by the DC bus into alternating current to power the target device, wherein the target device is an oil production-related device in the well site of the target oil field, thereby achieving the purpose of mainly using direct current for power transmission. Since direct current transmission does not have harmonic pollution and the system energy consumption is small, the technical effect of improving the power quality and transmission power efficiency is achieved, thereby solving the technical problems of serious harmonic pollution and high system energy consumption caused by mainly using alternating current for power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A hardware structure block diagram of a computer terminal for implementing a method for supplying power to a well site of an oil field is shown;

[0020] Figure 2 is a flow chart of a method for supplying power to a well site in an oil field according to an embodiment of the present invention;

[0021] Figure 3 is a structural block diagram of a device for supplying power to a well site of an oil field according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a system for supplying power to a well site of an oil field according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of a system for supplying power to a well site of an oil field according to an optional embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of a working mode of a system for supplying power to a well site of an oil field according to an optional embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of another working mode of a system for supplying power to a well site of an oil field according to an optional embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] According to an embodiment of the present invention, a method embodiment for supplying power to a well site in an oil field is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0029] The method embodiment provided in the first embodiment of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 1 The hardware structure block diagram of a computer terminal for implementing a method for supplying power to a well site in an oil field is shown. Figure 1 As shown, the computer terminal 10 may include one or more (102a, 102b, ..., 102n are used to illustrate) processors (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0030] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer terminal 10. As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0031] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the method for supplying power to the well site of the oil field in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, the method for supplying power to the well site of the oil field of the above-mentioned application program is realized. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer terminal 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0032] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer terminal 10 .

[0033] One or more wells will be dug in the oil field, and equipment such as pumping units will be installed at the wellheads to carry out oilfield exploitation. This is called a well site in the oil field. Pumping units will also be equipped with wellhead control cabinets, communication boxes and other oil production-related equipment to improve the efficiency of oilfield exploitation. In the related art, the oil production-related equipment is generally connected to the AC power grid, and the AC power in the AC power grid is sent to the oil production-related equipment through transmission lines without the need for AC / DC conversion in between. Since the well site of an oil field is generally far away from a power station, the transmission of AC power in the transmission lines will cause serious harmonic pollution and high transmission energy consumption. In order to solve the problems in the related art, the present invention provides a method for supplying power to a well site in an oil field. Figure 2 FIG. 1 is a flow chart of a method for supplying power to a well site in an oil field according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0034] Step S201: receiving output current of at least one power generation device.

[0035] In this step, the power generation equipment is a device that provides electric energy for the oil production equipment in the well field of the target oil field, that is, a device that supplies power to the well field of the target oil field. Specifically, it can be a thermal power plant, a photovoltaic power plant, a hydroelectric power plant, etc. There is no restriction on the number and type of power generation equipment here, which can be one device or multiple devices. The current output by the power generation equipment can be alternating current or direct current.

[0036] Step S202: determining the current type of the output current of at least one power generation device, wherein the current type includes direct current and alternating current.

[0037] In this step, since there may be multiple power generation equipment, if the currents output by the multiple power generation equipment are not of the same type, then two separate transmission lines need to be set up to supply power to the well sites of the target oil fields respectively. In addition, different current types require different transmission methods. For example, when the power generation equipment outputs direct current, since the oil production-related equipment can only be driven by alternating current, the direct current needs to be converted into alternating current and then transmitted to the oil production-related equipment. Therefore, it is necessary to determine the type of output current of the power generation equipment in advance and then process them separately. Specifically, the current type of the output current can be determined by checking the relevant instructions of the power generation equipment.

[0038] Step S203: when the at least one power generation device includes a first power generation device, connecting the output current of the first power generation device to a DC bus of a well site of the target oil field, wherein the output current of the first power generation device is direct current.

[0039] In this step, the first power generation device may be a power generation device that outputs direct current, specifically a photovoltaic power generation device. When the at least one power generation device includes the first power generation device, because the first power generation device outputs direct current, it is not necessary to convert the current type and directly connect to the DC bus of the well site of the target oil field. The DC bus can transmit the DC power to the well site of the target oil field to power the oil production related equipment.

[0040] Step S204: when at least one power generation device includes a second power generation device, convert the output current of the second power generation device into direct current and then connect it to the direct current bus, wherein the output current of the second power generation device is alternating current.

[0041] In this step, the second power generation equipment can be a power generation equipment that outputs alternating current, specifically a thermal power plant or an alternating current power grid. When at least one power generation equipment includes the first power generation equipment, since the DC bus transmits direct current, a converter is required to convert the current output by the second power generation equipment into direct current, which is then input into the DC bus. Specifically, the alternating current can be input into the AC side of the converter, the converter uses a filter circuit to filter the input alternating current, and then uses a rectifier circuit to convert the alternating current into direct current. Among them, the rectifier circuit is usually a bridge rectifier circuit, which converts the positive and negative half cycles of the alternating current into forward and reverse direct current, respectively. Then, a direct current regulation circuit is used to stably regulate the output direct current to ensure the stability and quality of the output direct current.

[0042] Step S205, converting the DC power output by the DC bus into AC power to power the target device, wherein the target device is equipment related to oil production in a well site of the target oil field.

[0043] In this step, since the oil production related equipment can only be driven by AC power, it is necessary to convert DC power into AC power and then transmit it to the oil production related equipment. At this time, a load frequency converter can be selected to convert the DC power output by the DC bus into AC power. Multiple load frequency converters can be set up, corresponding to multiple target devices one by one, and DC power is transmitted to the load frequency converters corresponding to each target device. The load frequency converter converts DC power into AC power for use by the target device; a load frequency converter can also be set up to convert DC power into AC power and then distribute it to each target device. Among them, the target device can be an oil pump or other equipment related to oil production.

[0044] Since in the scheme provided by the present invention, when powering the target device, the DC bus is mainly used to transmit DC power, and DC power does not cause harmonic pollution and has low energy consumption, the above steps achieve the technical effect of improving power quality and power efficiency, thereby solving the technical problems of serious harmonic pollution and high system energy consumption caused by the main use of AC power transmission. It should be noted that in the related technology, distributed photovoltaic power generation and grid-connected technology can be used to power the oil field. Specifically, after the DC power generated by the solar cell module is inverted into AC power by the inverter, it is connected to the grid through the low-voltage side of the 10 / 0.4kV transformer in the well site, and the load side is uniformly absorbed. However, this power supply method is incapable of introducing distributed power sources. The main reason is that the frequency and phase of the grid power supply and the distributed power supply must be completely consistent, which puts forward higher requirements for the grid-connected control technology of the distributed power supply. Since in the scheme provided by the present invention, the AC power is converted into DC power and then connected to the grid with the DC power output by other power supplies, it is not necessary to make the grid power supply and the distributed power supply completely consistent in frequency and phase. Therefore, compared with the related technology, the present invention has lower requirements for grid-connected control technology and a wider range of application.

[0045] As an optional embodiment, connecting the output current of the first power generation device to the DC bus of the well site of the target oil field can include the following steps: obtaining the power demand of the target device; adjusting the output current of the first power generation device according to the power demand; and connecting the adjusted output current of the first power generation device to the DC bus.

[0046] Optionally, the power demand of the target device can be obtained, and the output current of the first power generation device can be adjusted according to the power demand of the target device, thereby adjusting the electric energy delivered to the target device to improve the power utilization efficiency. Specifically, when the power demand of the target device is relatively small, the first power generation device can be adjusted to deliver less electric energy to the target device to reduce the waste of electric energy; when the power demand of the target device is relatively large, the first power generation device can be adjusted to deliver more electric energy to the target device to prevent the target device from failing to work properly. Specifically, an electric energy monitoring device can be selected to monitor the power consumption of the target device to obtain the actual power demand of the target device. According to the actual power demand of the target device obtained, the output current of the first power generation device is controlled by a converter.

[0047] As an optional embodiment, adjusting the output current of the first power generation device according to electricity demand may include the following steps: when the output current of the first power generation device meets the electricity demand, adjusting the first power generation device to output current at a constant voltage; and / or, when the output current of the first power generation device does not meet the electricity demand, adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output.

[0048] Optionally, taking the first power generation equipment as a photovoltaic power generation equipment, the electric energy generated by the first power generation equipment will change with the actual situation, so it may sometimes fail to meet the electricity demand, and sometimes meet the electricity demand. Therefore, it is necessary to be able to adjust at any time according to the relationship between the power generation situation and the electricity demand to improve the utilization efficiency of the electricity.

[0049] When the output current of the first power generation device meets the power demand, the output current of the first power generation device is adjusted by the converter so that the current is output at a constant voltage. The duty cycle signal can be adjusted by the converter to control the output voltage of the first power generation device. When the output voltage is higher than the set constant voltage value, the converter will reduce the duty cycle and reduce the output voltage; when the output voltage is lower than the set constant voltage value, the converter will increase the duty cycle and increase the output voltage, thereby achieving constant voltage output of the first power generation device.

[0050] When the output current of the first power generation device does not meet the power demand, the converter adjusts the current so that all the electric energy generated by the first power generation device is output, that is, the first power generation device outputs the current at the maximum power. The converter can use a maximum power point tracking algorithm to adjust the current to achieve maximum power output.

[0051] The output current of the first power generation device can be adjusted only when the output current of the first power generation device meets the power demand, or the output current of the first power generation device can be adjusted only when the output current of the first power generation device does not meet the power demand. Preferably, the above two methods can be combined to adjust the current in different situations.

[0052] As an optional embodiment, in the case where at least one power generation device includes a first power generation device and a second power generation device, the output current of the second power generation device is converted into direct current and then connected to a DC bus, including: adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output, and connecting the adjusted output current of the first power generation device to the DC bus; obtaining the power demand of the target device; adjusting the output current of the second power generation device according to the adjusted output current and power demand of the first power generation device; and converting the adjusted output current of the second power generation device into direct current and then connecting to the DC bus.

[0053] Optionally, taking the first power generation device as a photovoltaic power generation device and the second power generation device as an AC power grid as an example, because the photovoltaic power generation device is greatly affected by the environment, which will cause the voltage connected to the DC bus to be unstable, the second power generation device can be adjusted according to the power generation situation of the first power generation device and the actual power demand, so as to achieve the effect of balancing the DC bus voltage and improving the stability of the system. When the power generation device includes both the first power generation device and the second power generation device, that is, when the AC power grid and the photovoltaic power generation device simultaneously supply power to the well site of the target oil field, regardless of whether the output current of the first power generation device meets the power demand, the output current of the first power generation device is adjusted to the maximum power output, so that all the electric energy generated by the first power generation device is output. According to the actual power demand, the output current of the second power generation device can be adjusted by a converter, and the adjusted output current can be converted into direct current and then connected to the DC bus.

[0054] As an optional embodiment, the output current of the second power generation device is adjusted according to the adjusted output current of the first power generation device and the power demand, including: when the adjusted output current of the first power generation device does not meet the power demand, adjusting the current output by the second power generation device so that the sum of the adjusted output current of the first power generation device and the adjusted output current of the second power generation device meets the power demand; and / or, when the adjusted output current of the first power generation device meets the power demand, disconnecting the second power generation device from the DC bus.

[0055] Optionally, when the current output by the first power generation device does not meet the power demand, the first power generation device and the second power generation device can be used together to power the target device. The direct current output by the first power generation device is connected to the direct current bus after being adjusted by the current converter, and the alternating current output by the second power generation device is converted into direct current by the converter and connected to the direct current bus, so that the sum of all currents connected to the direct current bus meets the power demand. Among them, the first power generation device may not output current, and only the second power generation device is used to power the target device. In this case, it is necessary to control the current output by the second power generation device to meet the power demand of the target device. When the current output by the first power generation device meets the power demand, the second power generation device is not required to power the target device, that is, the connection between the second power generation device and the direct current bus is disconnected. The connection between the second power generation device and the direct current bus can be disconnected only when the output current of the first power generation device meets the power demand, or the current output by the second power generation device can be adjusted only when the output current of the first power generation device does not meet the power demand, so that the sum of the adjusted output current of the first power generation device and the adjusted output current of the second power generation device meets the power demand. Preferably, the current in different situations can be adjusted in combination with the above two methods.

[0056] As an optional embodiment, when the adjusted output current of the first power generation device meets the power demand, it also includes: connecting the first power generation device and the second power generation device; converting the current in the adjusted output current of the first power generation device that exceeds the power demand into alternating current, and transmitting it to the second power generation device.

[0057] Optionally, when the current output by the first power generation device meets the power demand, the current in the output current of the adjusted first power generation device that exceeds the power demand can be converted into alternating current, which can achieve the effect of saving costs and improving system flexibility. Specifically, the current generated by the first power generation device that exceeds the power demand passes through the converter, and an inverter circuit can be used to convert direct current into alternating current. Among them, the inverter circuit usually uses an inverter bridge circuit to convert direct current into alternating current with the same frequency and phase as the power grid, and uses a filter circuit to filter the alternating current output by the inverter to remove harmonics and noise, and then the alternating current output by the inverter is connected to the second power generation device, and the converted alternating current is transmitted to the second power generation device.

[0058] As an optional embodiment, it also includes: receiving the reverse power generation energy generated by the target device, wherein the reverse power generation energy is the electrical energy converted from kinetic energy when the target device is working; and inputting the reverse power generation energy into the DC bus.

[0059] Optionally, the target device may include an oil pump, which uses a power source to drive the pump rod to move up and down during operation, pumping the underground crude oil from the bottom of the well to the surface. When the pump rod moves downward, the gravity exerted on the pump rod releases potential energy. The released potential energy is converted into mechanical energy through a mechanical conversion device. The mechanical energy is then converted into electrical energy through a generator. The generated electrical energy can be converted into direct current through a load frequency converter, connected to a DC bus, and redistributed to each target device.

[0060] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0061] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method for supplying power to the well site of an oil field according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence or in other words, the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of various embodiments of the present invention.

[0062] According to an embodiment of the present invention, there is also provided a device for supplying power to a well site in an oil field for implementing the above method for supplying power to a well site in an oil field. Figure 3 is a structural block diagram of a device for supplying power to a well site in an oil field according to an embodiment of the present invention, such as Figure 3 As shown, the device for supplying power to the well site of the oil field includes: a receiving module 31, a determining module 32, a first access module 33, a second access module 34 and a power supply module 35. The device for supplying power to the well site of the oil field is described below.

[0063] The receiving module 31 is used to receive the output current of at least one power generation device.

[0064] The determination module 32 is connected to the receiving module 31 and is used to determine the current type of the output current of at least one power generation device, wherein the current type includes direct current and alternating current.

[0065] The first access module 33 is connected to the determination module 32, and is used to connect the output current of the first power generation device to the DC bus of the well site of the target oil field when at least one power generation device includes the first power generation device, wherein the output current of the first power generation device is DC.

[0066] The second access module 34 is connected to the determination module 32, and is used for converting the output current of the second power generation device into direct current and then accessing the direct current bus when at least one power generation device includes a second power generation device, wherein the output current of the second power generation device is alternating current.

[0067] The power supply module 35 is connected to the first access module 33 and / or the second access module 34, and is used to convert the DC power output by the DC bus into AC power to power the target device, wherein the target device is the equipment related to oil production in the well site of the target oil field.

[0068] It should be noted that the receiving module 31, the determining module 32, the first access module 33, the second access module 34 and the power supply module 35 correspond to steps S201 to S205 in the embodiment, and the examples and application scenarios implemented by the multiple modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiment. It should be noted that the above modules as part of the device can be run in the computer terminal 10 provided in the embodiment.

[0069] According to an embodiment of the present invention, a system for supplying power to a well site in an oil field is provided for implementing the above method for supplying power to a well site in an oil field. Figure 4 Schematic diagram of a system for supplying power to a well site in an oil field according to an embodiment of the present invention. Figure 4 As shown, the system for supplying power to the well site of the oil field includes: an AC power grid 41, a photovoltaic power generation unit 42, a two-wire current inverter 43, a photovoltaic interface converter 44, a DC bus 45, and a load frequency converter 46. The system for supplying power to the well site of the oil field is described below.

[0070] The AC power grid 41 is used to output AC power to supply power to target equipment, wherein the target equipment is equipment related to oil production in a well site of a target oil field.

[0071] The photovoltaic power generation unit 42 is used to output direct current to supply power to the target device.

[0072] The bidirectional grid-connected converter 43 is connected to the AC grid 41 and is used to adjust the output current of the AC grid and to convert the output current of the AC grid into direct current.

[0073] The photovoltaic interface converter 44 is connected to the photovoltaic power generation unit 42 and is used to adjust the output current of the photovoltaic power generation unit.

[0074] The DC bus 45 is connected to the bidirectional grid-connected converter 43 and the photovoltaic interface converter 44, and is used to transmit the output current of the photovoltaic power generation unit and / or the output current of the AC power grid converted into DC power.

[0075] The load frequency converter 46 is connected to the DC bus 45 and the target device, and is used to convert the DC power transmitted by the DC bus into AC power and input it into the target device.

[0076] Optionally, the system further comprises: when the well site of the target oil field comprises a plurality of target devices, it comprises: a plurality of load frequency converters, and the plurality of load frequency converters correspond one-to-one to the plurality of target devices.

[0077] A specific embodiment of the present invention is provided below:

[0078] Figure 5Schematic diagram of a system for supplying power to a well site in an oil field according to an optional embodiment of the present invention. Figure 5 As shown, a photovoltaic power generation unit is used as the first power generation device, an AC power grid is used as the second power generation device, a bidirectional grid-connected converter is provided in conjunction with the AC power grid, a photovoltaic interface converter is provided in conjunction with the photovoltaic power generation unit, and each pumping unit has its own corresponding load frequency conversion controller. The specific working mode of the system for powering a well site in an oil field provided by an optional embodiment of the present invention is described below:

[0079] (1) When photovoltaic power generation meets electricity demand, the photovoltaic power generation unit is adjusted to output current at maximum power through the photovoltaic interface converter. At this time, the current output by the photovoltaic power generation unit that exceeds the electricity demand is converted into AC power through the bidirectional grid-connected converter and transmitted to the AC power grid.

[0080] (2) Figure 6 The figure is a schematic diagram of a working mode of a system for supplying power to an oil well site according to an optional embodiment of the present invention, wherein the working mode in which the photovoltaic power generation equipment and the AC power grid are used together to supply power to the oil pump when the photovoltaic power generation equipment cannot meet the power demand is shown. Figure 6 As shown in the figure, when photovoltaic power generation does not meet the power demand, the photovoltaic power generation unit is adjusted to output at maximum power through the photovoltaic interface converter. At this time, the current output by the AC grid is converted into DC power by the bidirectional grid-connected converter to supplement the part of the power demand that photovoltaic power generation does not meet. At night, the photovoltaic power generation unit stops working and does not output current. At this time, the current output by the AC grid is converted into DC power by the bidirectional grid-connected converter to power the oil pump.

[0081] When only photovoltaic power generation units are used as power generation equipment:

[0082] (1) When photovoltaic power generation meets electricity demand, the photovoltaic power generation unit is adjusted to output current at a constant voltage through the photovoltaic interface converter.

[0083] (2) Figure 7 1 is a schematic diagram of another working mode of a system for supplying power to a well site of an oil field according to an optional embodiment of the present invention, wherein the working mode is shown when only photovoltaic power generation equipment is used as power generation equipment and cannot meet the power demand. Figure 7 As shown, when photovoltaic power generation cannot meet the electricity demand, the photovoltaic power generation unit is adjusted to output current at maximum power through the photovoltaic interface converter. At this time, general loads must be cut off and only important loads are retained. While maintaining the oil well production as much as possible, the damage caused by power outages to the oil wells is minimized.

[0084] In an optional specific embodiment, the system for supplying power to the well site of the oil field can be divided into three control levels: a power converter control layer, a bus power control layer, and a load power control layer. Among them, the power converter control layer includes a photovoltaic interface converter, a bidirectional grid-connected converter, and a load frequency converter. The current output by the photovoltaic power generation unit and the AC power grid and the current input to the target device are adjusted by adjusting the duty cycle, phase shift angle, or switching frequency of each converter. The bus power control layer mainly controls the transmission direction of the current by using a bidirectional grid-connected controller to stabilize the bus voltage. When the current output by the photovoltaic power generation unit meets the power demand, the current exceeding the load demand is controlled to flow to the AC power grid; when the current output by the photovoltaic power generation unit does not meet the power demand, the current output by the AC power grid is controlled to flow to the target device. The load power balancing layer controls the target device. Because the pumping unit has the characteristic of periodic power fluctuation, the arbitrary superposition of multiple periodic fluctuation loads may produce large power fluctuations, which may cause problems such as increased losses, increased equipment damage rate, and system instability. The target device is controlled through the controller of the target device, and the corresponding voltage or current is output to control the speed and direction of the motor. On the basis of not changing the original cycle of the target device, the power curve of the target device is controlled to avoid the phenomenon of load power peak plus peak and trough plus trough, thereby improving the stability of the system and reducing the power loss of the system.

[0085] An embodiment of the present invention may provide a computer device. Optionally, in this embodiment, the computer device may be located in at least one network device among multiple network devices of a computer network. The computer device includes a memory and a processor.

[0086] Among them, the memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the method and device for supplying power to the well site of the oil field in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, that is, realizing the above-mentioned method for supplying power to the well site of the oil field. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0087] The processor can call the information and application stored in the memory through the transmission device to perform the following steps: receiving the output current of at least one power generation device; determining the current type of the output current of at least one power generation device, wherein the current type includes direct current and alternating current; when at least one power generation device includes a first power generation device, connecting the output current of the first power generation device to the DC bus of the well site of the target oil field, wherein the output current of the first power generation device is direct current; when at least one power generation device includes a second power generation device, converting the output current of the second power generation device into direct current and then connecting it to the DC bus, wherein the output current of the second power generation device is alternating current; converting the direct current output from the DC bus into alternating current to power the target device, wherein the target device is oil production-related equipment in the well site of the target oil field.

[0088] Optionally, the processor may also execute program code for the following steps: connecting the output current of the first power generation device to the DC bus of the well site of the target oil field, including: obtaining the power demand of the target device; adjusting the output current of the first power generation device according to the power demand; and connecting the adjusted output current of the first power generation device to the DC bus.

[0089] Optionally, the processor may also execute program code for the following steps: adjusting the output current of the first power generation device according to power demand, including: when the output current of the first power generation device meets the power demand, adjusting the output current of the first power generation device to a constant voltage; and / or, when the output current of the first power generation device does not meet the power demand, adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output.

[0090] Optionally, the processor may also execute program code for the following steps: in a case where at least one power generation device includes a first power generation device and a second power generation device, the output current of the second power generation device is converted into direct current and then connected to a direct current bus, including: adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output, and connecting the adjusted output current of the first power generation device to the direct current bus; obtaining the power demand of the target device; adjusting the output current of the second power generation device according to the adjusted output current and power demand of the first power generation device; and converting the adjusted output current of the second power generation device into direct current and then connecting to the direct current bus.

[0091] Optionally, the processor may also execute program code for the following steps: adjusting the output current of the second power generation device according to the adjusted output current of the first power generation device and the power demand, including: when the adjusted output current of the first power generation device does not meet the power demand, adjusting the current output by the second power generation device so that the sum of the adjusted output current of the first power generation device and the adjusted output current of the second power generation device meets the power demand; and / or, when the adjusted output current of the first power generation device meets the power demand, disconnecting the second power generation device from the DC bus.

[0092] Optionally, the processor may also execute program code for the following steps: when the adjusted output current of the first power generation device meets the power demand, it also includes: connecting the first power generation device and the second power generation device; converting the current in the adjusted output current of the first power generation device that exceeds the power demand into alternating current, and transmitting it to the second power generation device.

[0093] Optionally, the processor may also execute the program code of the following steps: including: receiving the reverse power generation energy generated by the target device, wherein the reverse power generation energy is the electrical energy converted from the kinetic energy when the target device is working; and inputting the reverse power generation energy into the DC bus.

[0094] By adopting the embodiment of the present invention, a scheme for supplying power to a well site of an oil field is provided. The output current of at least one power generation device is received; the current type of the output current of at least one power generation device is determined, wherein the current type includes direct current and alternating current; when at least one power generation device includes a first power generation device, the output current of the first power generation device is connected to the DC bus of the well site of the target oil field, wherein the output current of the first power generation device is direct current; when at least one power generation device includes a second power generation device, the output current of the second power generation device is converted into direct current and then connected to the DC bus, wherein the output current of the second power generation device is alternating current; the direct current outputted by the DC bus is converted into alternating current to supply power to the target device, wherein the target device is the equipment related to oil production in the well site of the target oil field, thereby achieving the purpose of no harmonic pollution and reducing system energy consumption, thereby achieving the technical effect of improving power quality and power efficiency, and further solving the technical problems of serious harmonic pollution and high system energy consumption caused by mainly using alternating current for power transmission.

[0095] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a non-volatile storage medium, and the storage medium may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0096] The embodiment of the present invention further provides a non-volatile storage medium. Optionally, in this embodiment, the non-volatile storage medium can be used to store the program code executed by the method for supplying power to a well site in an oil field provided by the embodiment.

[0097] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0098] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: receiving an output current of at least one power generation device; determining a current type of the output current of at least one power generation device, wherein the current type includes direct current and alternating current; when at least one power generation device includes a first power generation device, connecting the output current of the first power generation device to a DC bus of a well site of a target oil field, wherein the output current of the first power generation device is direct current; when at least one power generation device includes a second power generation device, converting the output current of the second power generation device into direct current and connecting it to the DC bus, wherein the output current of the second power generation device is alternating current; converting the direct current output from the DC bus into alternating current to power a target device, wherein the target device is oil production-related equipment in the well site of the target oil field.

[0099] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: connecting the output current of the first power generation device to the DC bus of the well site of the target oil field, including: obtaining the power demand of the target device; adjusting the output current of the first power generation device according to the power demand; and connecting the adjusted output current of the first power generation device to the DC bus.

[0100] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: adjusting the output current of the first power generation device according to power demand, including: when the output current of the first power generation device meets the power demand, adjusting the first power generation device to output current at a constant voltage; and / or, when the output current of the first power generation device does not meet the power demand, adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output.

[0101] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: in a case where at least one power generation device includes a first power generation device and a second power generation device, the output current of the second power generation device is converted into direct current and then connected to a DC bus, including: adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output, and connecting the adjusted output current of the first power generation device to the DC bus; obtaining the power demand of the target device; adjusting the output current of the second power generation device according to the adjusted output current and power demand of the first power generation device; and converting the adjusted output current of the second power generation device into direct current and then connecting to the DC bus.

[0102] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: adjusting the output current of the second power generation device according to the adjusted output current of the first power generation device and the power demand, including: when the adjusted output current of the first power generation device does not meet the power demand, adjusting the current output by the second power generation device so that the sum of the adjusted output current of the first power generation device and the adjusted output current of the second power generation device meets the power demand; and / or, when the adjusted output current of the first power generation device meets the power demand, disconnecting the second power generation device from the DC bus.

[0103] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: when the adjusted output current of the first power generation device meets the power demand, it also includes: connecting the first power generation device and the second power generation device; converting the current in the adjusted output current of the first power generation device that exceeds the power demand into alternating current, and transmitting it to the second power generation device.

[0104] Optionally, in this embodiment, the non-volatile storage medium is configured to store program codes for executing the following steps: also including: receiving the reverse power generation energy generated by the target device, wherein the reverse power generation energy is the electrical energy converted from kinetic energy when the target device is working; and inputting the reverse power generation energy into the DC bus.

[0105] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0106] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0108] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0109] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0110] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for supplying power to a well site in an oil field, characterized in that: include: receiving an output current of at least one power generation device; determining a current type of an output current of the at least one power generation device, wherein the current type includes direct current and alternating current; In the case where the at least one power generation device includes a first power generation device, connecting the output current of the first power generation device to a DC bus of a well site of a target oil field, wherein the output current of the first power generation device is direct current; In the case where the at least one power generation device includes a second power generation device, the output current of the second power generation device is converted into direct current and then connected to the direct current bus, wherein the output current of the second power generation device is alternating current; The direct current output by the direct current bus is converted into alternating current to power a target device, wherein the target device is a device related to oil production in a well site of the target oil field.

2. The method according to claim 1, characterized in that The step of connecting the output current of the first power generation device to a DC bus of a well site of a target oil field comprises: Obtaining power demand of the target device; According to the power demand, adjusting the output current of the first power generation device; The adjusted output current of the first power generation device is connected to the DC bus.

3. The method according to claim 2, characterized in that The step of adjusting the output current of the first power generation device according to the power demand includes: When the output current of the first power generation device meets the power demand, adjusting the first power generation device to output current at a constant voltage; and / or, When the output current of the first power generation device does not meet the power demand, the output current of the first power generation device is adjusted so that all the electric energy generated by the first power generation device is output.

4. The method according to claim 1, characterized in that: In the case where the at least one power generation device includes the first power generation device and the second power generation device, converting the output current of the second power generation device into direct current and then connecting it to the direct current bus includes: adjusting the output current of the first power generation device so that all the electric energy generated by the first power generation device is output, and connecting the adjusted output current of the first power generation device to the DC bus; Obtaining power demand of the target device; adjusting the output current of the second power generation device according to the adjusted output current of the first power generation device and the power demand; The adjusted output current of the second power generation device is converted into direct current and then connected to the direct current bus.

5. The method according to claim 4, characterized in that Adjusting the output current of the second power generation device according to the adjusted output current of the first power generation device and the power demand includes: When the output current of the adjusted first power generation device does not meet the power demand, adjusting the current output by the second power generation device so that the sum of the output current of the adjusted first power generation device and the output current of the adjusted second power generation device meets the power demand; and / or, When the adjusted output current of the first power generating device meets the power demand, the connection between the second power generating device and the DC bus is disconnected.

6. The method according to claim 5, characterized in that In the case where the adjusted output current of the first power generation device meets the power demand, the method further includes: connecting the first power generation device and the second power generation device; The current in the adjusted output current of the first power generating device that exceeds the power demand is converted into alternating current and transmitted to the second power generating device.

7. The method according to any one of claims 1 to 6, characterized in that: Also includes: Receiving reverse power generation energy generated by the target device, wherein the reverse power generation energy is electrical energy converted from kinetic energy when the target device is working; The reverse power generation energy is input into the DC bus.

8. A device for supplying power to a well site in an oil field, characterized in that: include: A receiving module, used for receiving an output current of at least one power generation device; A determination module, configured to determine a current type of an output current of the at least one power generation device, wherein the current type includes direct current and alternating current; A first access module is used for, when the at least one power generation device includes a first power generation device, connecting the output current of the first power generation device to a DC bus of a well site of a target oil field, wherein the output current of the first power generation device is direct current; A second access module is used for, when the at least one power generation device includes a second power generation device, converting the output current of the second power generation device into direct current and then accessing the direct current bus, wherein the output current of the second power generation device is alternating current; A power supply module is used to convert the direct current output by the direct current bus into alternating current to power a target device, wherein the target device is equipment related to oil production in a well site of the target oil field.

9. A system for supplying power to a well site in an oil field, characterized in that: include: An AC power grid, used to output AC power to supply power to a target device, wherein the target device is a device related to oil production in a well site of a target oil field; A photovoltaic power generation unit, used for outputting direct current to supply power to the target device; a bidirectional grid-connected converter, connected to the AC power grid, for adjusting the output current of the AC power grid and for converting the output current of the AC power grid into direct current; A photovoltaic interface converter, connected to the photovoltaic power generation unit, for adjusting the output current of the photovoltaic power generation unit; A DC bus, connected to the bidirectional grid-connected converter and the photovoltaic interface converter, for transmitting the output current of the photovoltaic power generation unit and / or the output current of the AC power grid converted into DC power; A load frequency converter is connected to the DC bus and the target device, and is used to convert the DC power transmitted by the DC bus into AC power and input it into the target device.

10. The system according to claim 9, characterized in that In the case that the well site of the target oil field includes a plurality of target devices, the plurality of load frequency converters are included, and the plurality of load frequency converters correspond to the plurality of target devices one by one.

11. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute the method for supplying power to a well site in an oil field as claimed in any one of claims 1 to 7.

12. A computer device, characterized in that: include: Memory and processor, The memory stores a computer program; The processor is used to execute the computer program stored in the memory, and when the computer program is run, the processor executes the method for supplying power to a well site in an oil field as claimed in any one of claims 1 to 7.

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