Solar power supply device for oil field well site pressure driving equipment

Abstract

The invention provides a solar power supply device for oil field well site pressure driving equipment, which belongs to the technical field of power supply equipment and comprises a photovoltaic power generation system, a storage battery, a solar air Brayton cycle cogeneration system and a photothermal conversion system. Electric energy generated by the photovoltaic power generation system is supplied to the storage battery, the electric control center receives electric energy generated by the storage battery and the solar air Brayton cycle combined heat and power system, and the thermoelectric conversion system is connected with the solar air cycle combined heat and power system to achieve heat exchange and supply the exchanged heat to an oil well. Green energy and sustainable development can be provided, and green production and sustainable development are achieved; diversified supply and efficient utilization of energy are achieved, and the power supply reliability and economical efficiency of oil field fracturing equipment are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply equipment, and relates to a solar power supply device for a pressure drive device in an oilfield well site. Background Art

[0002] For a long time, the electric energy of oilfield fracturing equipment has been mainly supplied by configured generators or grid electric energy. With the remarkable progress made by China in new energy technologies, including technological innovation and application in the fields of solar energy, wind energy, biomass energy, etc. The continuous maturity and popularization of these technologies provide strong support for the application of new energy power supply in oilfield fracturing equipment, and more and more oilfield fracturing equipment begins to adopt new energy power supply methods.

[0003] As a major energy-consuming unit in the ground gathering and transportation system, the existing crude oil heating of the pressure drive device in the oilfield well site mostly uses a heating system with a fuel or gas heating furnace as the core, which not only has low thermal efficiency, but also has a large consumption of oil and gas and high production operation costs. At the same time, the combustion of fossil fuels also brings environmental problems such as carbon dioxide and particulate pollutant emissions.

[0004] More and more oilfields are beginning to explore alternative new energies to reduce dependence on traditional oil and reduce environmental impacts. New energies such as solar energy and wind energy, as clean and renewable energies, are gradually being taken seriously in oilfield production. However, solar energy and wind energy are intermittent and unstable. The change in wind speed will cause the output power of the wind power generation system to fluctuate, which will impact the stable operation of the power grid load.

[0005] The back-injection skid-mounted device of the pressure drive device in the oilfield well site usually requires continuous and stable power supply to ensure its normal operation. The solar power supply system needs to be able to continuously provide sufficient power to meet the operation requirements of the equipment and solve the problem of unstable power supply caused by weather changes. Summary of the Invention

[0006] To solve the technical problems existing in the above background art, on the one hand, the present invention provides a solar power supply device for a pressure drive device in an oilfield well site, including: a photovoltaic power generation system, a storage battery, a solar air Brayton cycle combined heat and power supply system, and a photothermal conversion system; The electric energy generated by the photovoltaic power generation system is supplied to the storage battery. The electric control center receives the electric energy generated by the storage battery and the solar air Brayton cycle combined heat and power supply system. The thermoelectric conversion system is connected to the solar air cycle combined heat and power supply system to achieve heat exchange, and the heat after exchange is supplied to the pressure drive device in the oilfield well site.

[0007] Furthermore, the photovoltaic power generation system includes solar photovoltaic panels that perform photoelectric conversion and use a storage battery to store electrical energy. A solar backplane is installed on the back of the solar photovoltaic panels, and a main heat dissipation plate is fixedly installed at the bottom of the solar backplane. A heat exchange tube is fitted inside the main heat dissipation plate. The flow channel formed by the heat exchange tube in the main heat dissipation plate is used for the transportation of cooling water, and heat is fully absorbed through the counter-flow of the medium in the heat exchange tube. The heat exchange tube that has absorbed heat then transfers the heat for utilization.

[0008] Furthermore, the storage battery uses a lead-acid maintenance-free battery.

[0009] Furthermore, the solar air circulation combined heat and power system includes an energy storage power generation cycle subsystem, a Kalina cycle subsystem, and a heat storage subsystem. The heat storage subsystem includes a waste heat exchanger, a heat storage device, and a heat storage heat exchanger. The heat storage device is connected to the energy storage power generation cycle subsystem through the waste heat exchanger. The working fluid in the energy storage power generation cycle subsystem exchanges heat with the heat storage medium in the heat storage device through the waste heat exchanger so as to heat the heat storage medium with the waste heat of the working fluid in the energy storage power generation cycle subsystem. The heat storage device is connected to the Kalina cycle subsystem through the heat storage heat exchanger. The heat storage medium in the heat storage device exchanges heat with the working fluid in the Kalina cycle subsystem through the heat storage heat exchanger so as to heat the working fluid in the Kalina cycle subsystem with the heat storage medium.

[0010] Furthermore, the solar thermal conversion system includes a solar PVT component array, which is electrically connected to the solar air circulation combined heat and power system. The solar air circulation combined heat and power system is respectively electrically connected to an ultra-low temperature air source auxiliary device and a solar heat exchange unit. The solar heat exchange unit is respectively connected to a heating, water supply water tank, and hot water supply tank through water pipes. The solar heat exchange unit is also connected to the solar PVT component array through a heat exchange pipe. A circulating medium is provided in the heat exchange pipe, realizing the rational utilization of solar energy and electrical energy under different weather conditions, maximizing the utilization of solar energy as much as possible, and meeting the needs of building heating and domestic heating, etc.

[0011] The beneficial effects of the present invention are: The present invention provides a solar power supply device for a pressure drive device in an oilfield well site, including: a photovoltaic power generation system, a storage battery, a solar air Brayton cycle combined heat and power supply system, and a photothermal conversion system; the electric energy generated by the photovoltaic power generation system is supplied to the storage battery, the electric control center receives the electric energy generated by the storage battery and the solar air Brayton cycle combined heat and power supply system, and the thermoelectric conversion system is connected to the solar air cycle combined heat and power supply system to achieve heat exchange, and the heat after exchange is supplied to the oil well, which can provide green energy and sustainable development. As a clean and renewable energy source, solar energy combined with oilfield fracturing equipment helps to reduce carbon emissions and achieve green production and sustainable development. It constructs a complementary power supply with generator power supply and grid power supply. Through reasonable energy configuration and dispatching strategies, it realizes diversified energy supply and efficient utilization, and improves the power supply reliability and economy of oilfield fracturing equipment. The operating state and performance parameters of the solar power supply system are monitored in real time. Once abnormalities or faults are found, the system can automatically perform fault diagnosis and early warning, notify the management personnel in time and take corresponding measures to avoid the expansion of faults or serious consequences.

[0012] Advantages of additional aspects of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The schematic diagrams of the specification forming a part of the present invention are used to provide a further understanding of the present invention. The schematic 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.

[0014] Figure 1 is a schematic structural diagram of a solar power supply device for a pressure drive device in an oilfield well site according to the present invention; Figure 2 is a schematic diagram of the test process of the present invention; Wherein: 1. Photovoltaic power generation system; 2. Storage battery; 3. Solar air cycle combined heat and power supply system; 4. Photothermal conversion system; 5. Energy storage unit; 6. Pressure drive device in oilfield well site; 7. Heat storage subsystem; 8. Solar backplane; 9. Waste heat heat exchanger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this embodiment have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational terms determined for the convenience of describing the structural relationships of various components or elements of the present invention and do not specifically refer to any component or element in the present invention and should not be construed as a limitation to the present invention.

[0019] In the present invention, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in the field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances and should not be construed as a limitation to the present invention.

[0020] Embodiment 1, as Figure 1 - Figure 2 shown, this embodiment provides a solar power supply device for an oilfield well site pressure drive device, including: a photovoltaic power generation system 1, a storage battery 2, a solar air circulation combined heat and power supply system 3, and a photo-thermal conversion system 4; The electric energy generated by the photovoltaic power generation system is supplied to the energy storage unit 5. The energy storage unit 5 uses a storage battery. The electric control center receives the electric energy generated by the storage battery and the solar air Brayton cycle combined heat and power supply system. The thermoelectric conversion system is connected to the solar air circulation combined heat and power supply system to achieve heat exchange, and the exchanged heat is supplied to the oilfield well site pressure drive device 6.

[0021] In view of the actual operation situation of the oilfield, based on the Xihe energy meteorological big data platform, a multi-energy complementary model of the power lumped system and the thermal lumped system is established. The power lumped system includes a photovoltaic power generation system, a wind power generation system, a solar air Brayton cycle power generation system, and a storage battery, and the state grid operates in coordination. Reduce the dependence of the oilfield operation area on non-green electricity in the state grid; the thermal lumped system includes a photo-thermal conversion system and a solar air circulation heat conversion system, and the heating furnace supplements the heat supply. The solar air Brayton cycle power generation system and the solar air circulation heat conversion system are collectively referred to as the solar air circulation combined heat and power supply system.

[0022] The photovoltaic power generation system includes solar photovoltaic panels. The solar photovoltaic panels perform photovoltaic conversion and use a storage battery to store electric energy. A solar backplane 8 is installed on the back of the solar photovoltaic panel. A main heat dissipation plate is fixedly installed at the bottom of the solar backplane 8. A heat exchange tube is embedded in the main heat dissipation plate. The flow channel formed by the heat exchange tube in the main heat dissipation plate is used for the transportation of cooling water source, and the heat is fully absorbed through the counter-directional circulation with the medium in the heat exchange tube. The heat exchange tube that has absorbed heat then conducts heat transfer for utilization. It is applicable to use under high temperature, solving the problem that solar energy cannot be effectively and fully utilized at high temperature, which is beneficial to improving the utilization rate of solar energy; by collecting the operation parameters and environmental parameters of the solar photovoltaic panel through built-in sensors for prediction and calculation, and adjusting the power of the heat exchange tube when exceeding the set threshold, so as to improve the photovoltaic conversion efficiency of the solar photovoltaic panel, and providing a warning for maintenance when the equipment fails.

[0023] Specifically, the operation collection module and the external environment module are used to collect the internal operation parameters and external environment parameters of the solar photovoltaic panel, forming an operation data group and real-time environment data. The positioning module marks the relevant monitored data and the position information of the photovoltaic cells, forming a positioning data group. The verification module processes the operation data group and the real-time environment data group to form a first data set and a second data set. The data processing module establishes an overspeed operation model of the solar photovoltaic panel for prediction and calculation, obtaining: an operation anomaly index Yxzs, and matching it with the preset operation anomaly threshold Y of the operation evaluation module to obtain an anomaly level measure response plan. Finally, the feedback execution module performs specific execution, integrates with the positioning data set, forms a feedback notification, achieving automatic detection and recording of the vacancy inspection period of the solar photovoltaic panel array.

[0024] The storage battery uses a lead-acid maintenance-free battery. The lead-acid battery is composed of positive and negative plates, separators, a case, electrolyte, terminal posts, etc. Its discharge chemical reaction depends on the active substances of the positive and negative plates under the action of the electrolyte. Among them, the grid of the plate. The traditional storage battery is made of lead-antimony alloy, and the maintenance-free battery is made of lead-calcium alloy. The former uses antimony and the latter uses calcium, which is the fundamental difference between the two. Different materials will produce different phenomena: during use, the liquid reduction phenomenon will occur. The antimony on the grid will contaminate the spongy pure lead on the negative plate, weakening the back electromotive force in the storage battery after full charge, causing excessive decomposition of water, and a large amount of oxygen and hydrogen escape from the positive and negative plates respectively, reducing the electrolyte. Replacing antimony with calcium can change the back electromotive force of the storage battery after full charge, reduce the overcharge current, and reduce the gasification speed of the liquid, thereby reducing the loss of the electrolyte.

[0025] The solar air circulation combined heat and power supply system includes an energy storage power generation cycle subsystem, a Kalina cycle subsystem, and a heat storage subsystem. The heat storage subsystem 7 includes a waste heat heat exchanger 9, a heat storage device, and a heat storage heat exchanger. The heat storage device is connected to the energy storage power generation cycle subsystem through the waste heat heat exchanger 9. The working fluid in the energy storage power generation cycle subsystem exchanges heat with the heat storage medium in the heat storage device through the waste heat heat exchanger so as to heat the heat storage medium by the waste heat of the working fluid in the energy storage power generation cycle subsystem. The heat storage device is connected to the Kalina cycle subsystem through the heat storage heat exchanger. The heat storage medium in the heat storage device exchanges heat with the working fluid in the Kalina cycle subsystem through the heat storage heat exchanger so as to heat the working fluid in the Kalina cycle subsystem by the heat storage medium.

[0026] The solar thermal conversion system includes a solar PVT component array, which is electrically connected to the solar air circulation combined heat and power supply system. The solar air circulation combined heat and power supply system is respectively electrically connected to an ultra-low temperature air source auxiliary device and a solar heat exchange unit. The solar heat exchange unit is respectively connected to a heating water tank, a water supply tank, and a hot water supply tank through water pipelines. The solar heat exchange unit is also connected to the solar PVT component array through a heat exchange pipeline. A circulating medium is provided in the heat exchange pipeline, realizing the rational utilization of solar energy and electric energy under different weather conditions, maximizing the utilization of solar energy as much as possible, and meeting the needs of building heating and domestic heating, etc.

[0027] (1) Technical research and demand analysis: Study the current situation of solar power supply technology, and analyze the specific requirements and equipment parameters of the oilfield reinjection skid-mounted device.

[0028] (2) Technical selection and scheme design: According to the results of demand analysis, select a suitable solar power supply technology route; design the overall scheme of the solar power supply system.

[0029] (3) System design and optimization: Design the overall architecture of the solar power supply system, including key components such as solar cell modules, solar controllers, and batteries (groups); optimize the system parameters and configurations according to the specific working environment and requirements of the oilfield reinjection skid-mounted device.

[0030] (4) System integration and testing: Integrate core components such as solar panels, solar controllers, and batteries (groups) into a system to form a complete solar power supply system; conduct comprehensive tests on the power supply system to verify its performance and stability.

[0031] (5) Field application and verification: Apply the solar power supply system to the oilfield reinjection skid-mounted device for testing and application verification; monitor and analyze the operation data of the system to evaluate its performance and effect; make necessary adjustments and optimizations to the system according to the application situation.

[0032] The experimental objective of this project is to verify the feasibility and stability of the solar power supply system applied to the oilfield reinjection water skid-mounted device, and off-line data is used for testing. The experiment is completed by designing and installing the solar power supply system and using necessary testing instruments and equipment. It mainly includes the following parts: (1) System debugging: Simulate the connection of the solar power supply system with the oilfield reinjection water skid-mounted device, and test the power supply equipment to ensure the normal operation of the device.

[0033] (2) Static performance test: Under standard test conditions (such as light intensity, temperature, etc.), test the power output performance of the solar power supply system, including parameters such as voltage, current, and power.

[0034] (3) Dynamic performance test: Use data to simulate the actual working conditions of the reinjection water skid-mounted device, and test the power output performance of the solar power supply system under different loads.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A solar power supply device for oil field well site pressure drive equipment, characterized in that: include: Photovoltaic power generation systems, batteries, solar-air Brayton cycle combined heat and power systems, and photothermal conversion systems; The electricity generated by the photovoltaic power generation system is supplied to the battery, the electric control center receives the electricity generated by the battery and the solar air Brayton cycle cogeneration system, the thermoelectric conversion system is connected to the solar air cycle cogeneration system to realize heat exchange, and the exchanged heat is supplied to the oil field well site pressure drive equipment.

2. The drug interaction prediction method based on multi-source feature enhancement according to claim 1, characterized in that: The photovoltaic power generation system includes solar photovoltaic panels, which perform photoelectric conversion and use batteries to store electrical energy. A solar backboard is installed on the back of the solar photovoltaic panel, and a main heat sink is fixedly installed on the bottom of the solar backboard. Heat exchange tubes are embedded inside the main heat sink. The flow channel formed by the heat exchange tubes in the main heat sink is used for the transportation of cooling water, and the heat is fully absorbed through the counter-flow with the medium in the heat exchange tubes. The heat is then transferred through the heat exchange tubes that absorb the heat for utilization.

3. The drug interaction prediction method based on multi-source feature enhancement according to claim 1, characterized in that: The battery used is lead-acid maintenance-free battery.

4. The drug interaction prediction method based on multi-source feature enhancement according to claim 1, characterized in that: The solar air cycle cogeneration system includes an energy storage power generation cycle subsystem, a Kalina cycle subsystem, and a heat storage subsystem. The heat storage subsystem includes a waste heat exchanger, a heat storage device, and a heat storage heat exchanger. The heat storage device is connected to the energy storage power generation cycle subsystem through the waste heat exchanger. The working fluid in the energy storage power generation cycle subsystem exchanges heat with the heat storage medium in the heat storage device through the waste heat exchanger so as to heat the heat storage medium with the waste heat of the working fluid in the energy storage power generation cycle subsystem. The heat storage device is connected to the Kalina cycle subsystem through the heat storage heat exchanger. The heat storage medium in the heat storage device exchanges heat with the working fluid in the Kalina cycle subsystem through the heat storage heat exchanger so as to heat the working fluid in the Kalina cycle subsystem through the heat storage medium.

5. The drug interaction prediction method based on multi-source feature enhancement according to claim 1, characterized in that: The photothermal conversion system includes a solar PVT component array, which is electrically connected to a solar air circulation cogeneration system. The solar air circulation cogeneration system is electrically connected to ultra-low temperature air source auxiliary equipment and a solar heat exchanger unit respectively. The solar heat exchanger unit is connected to a heating, water supply tank and a hot water supply tank respectively through water pipes. The solar heat exchanger unit is also connected to the solar PVT component array through a heat exchange pipe, and a circulating medium is provided in the heat exchange pipe.

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