Fracturing well site power supply system, fracturing well site system and fracturing well site power supply method

Abstract

The invention relates to a fracturing well site power supply system, a fracturing well site system and a fracturing well site power supply method.The fracturing well site power supply system comprises multiple sets of power distribution equipment, each power distribution equipment comprises a wire inlet part and a wire outlet part, and each wire outlet part comprises multiple wire outlet switch cabinets with wire outlet circuit breakers; the multiple groups of power generation units are correspondingly and electrically connected with the wire inlet parts of the multiple groups of power distribution equipment; and the multiple sets of electric-driven fracturing equipment are correspondingly and electrically connected with the wire outlet parts of the multiple sets of power distribution equipment, each set of electric-driven fracturing equipment comprises a plurality of electric-driven fracturing equipment bodies, and each electric-driven fracturing equipment body is connected to one wire outlet circuit breaker. The power generation units and the electrically-driven fracturing equipment are grouped respectively, so that the power supply of the electrically-driven fracturing equipment supplied to each well is not limited to one power generation unit, when a certain power generation unit breaks down, other power generation units are not affected, and therefore the power supply task is completed, and well blockage accidents can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas field fracturing, and in particular to a fracturing well site power supply system, a fracturing well site system, and a fracturing well site power supply method. Background Art

[0002] Currently, traditional oilfield fracturing sites use diesel engines to drive plunger pumps for fracturing operations. Due to the advantages of electric motors, such as low cost, low noise, and high power density, the use of electric motors to drive plunger pumps is becoming increasingly mainstream in electric fracturing operations. Using electric motors requires a power source. Existing solutions involve direct connection to the power grid, but this requires a long installation period and high investment. Furthermore, the power required for wellsite operations is high, which cannot meet the short-term high-power loads required during fracturing operations, and the power grid capacity cannot fully meet this demand. Therefore, the use of mobile generators mounted on vehicles to power the motors that drive the plunger pumps has become a new approach at oilfield fracturing wellsites.

[0003] At some smaller well sites, electric fracturing, combining mobile generators and electric fracturing equipment, is used. Compared to traditional diesel generators, these have a higher power density, allowing for smaller well site footprints. They also reduce noise and emissions during operation. However, a single generator set is used for the entire fracturing site. If a single generator set experiences a problem and shuts down, it can cause a power outage at the well site. This can also lead to well plugging during sand addition operations.

[0004] As wellsites expand in size, power demands increase. A single generator set is no longer sufficient for some high-power wellsites. To ensure smooth operations, multiple generator sets are often required to operate in parallel at a fracturing wellsite. In this scenario, if one generator set experiences a problem and shuts down, the load is immediately transferred to the remaining operating units, causing them to overload and shut down, ultimately shutting down all units and ultimately causing a power outage at the wellsite. This can also lead to well plugging during sand addition operations.

[0005] To prevent well plugging during fracturing after a generator outage, fracturing sites now utilize a combination of diesel-driven and electric-driven equipment. If the electric-driven fracturing equipment shuts down due to a power outage, the diesel-driven fracturing system can continue. This method of operation avoids sand plugging caused by a sudden generator outage. While this approach can improve some efficiency, it still offers no significant improvement compared to fully electric-driven well sites, such as the large footprint and excessive noise levels. Furthermore, it still offers limited economic benefits. Summary of the Invention

[0006] Based on this, it is necessary to propose a fracturing well site power supply system that can ensure the reliability of fracturing operations and reduce well site noise. A fracturing well site system and a fracturing well site power supply method are also proposed.

[0007] According to one aspect of the present application, a fracturing well site power supply system includes: multiple groups of power distribution equipment, each power distribution equipment includes an incoming line part and an outgoing line part, and the outgoing line part includes multiple outgoing line switch cabinets each having an outgoing line circuit breaker; multiple groups of power generation units, multiple groups of power generation units are electrically connected to the incoming line parts of multiple groups of power distribution equipment correspondingly; multiple groups of electric-driven fracturing equipment are electrically connected to the outgoing line parts of multiple groups of power distribution equipment correspondingly, each group of electric-driven fracturing equipment includes multiple electric-driven fracturing equipment, and each of the electric-driven fracturing equipment is respectively connected to one of the outgoing line circuit breakers.

[0008] In some embodiments, the system further includes auxiliary equipment; and multiple sets of auxiliary power supplies connected to the automatic transfer switch, and selectively supplying power to the auxiliary equipment through the automatic transfer switch.

[0009] In some embodiments, the incoming lines of multiple groups of the power distribution equipment are connected in parallel via a busbar.

[0010] In some embodiments, the fracturing well site power supply system further includes auxiliary equipment, and an input end of the auxiliary equipment is connected to one of the outgoing line circuit breakers.

[0011] In some embodiments, the fracturing well site power supply system further includes a first control module, which is connected to each of the power generation units. The first control module is configured with a mapping relationship between multiple groups of the power generation units and all outgoing circuit breakers. The first control module is used to: during the fracturing well site operation, monitor and obtain information on unactivated power generation units in the multiple groups of the power generation units, and disconnect the outgoing circuit breakers corresponding to the unactivated power generation units.

[0012] In some embodiments, the fracturing well site power supply system also includes a first control module and a second control module; the second control module is connected to each of the electric-driven fracturing equipment and the first control module, and the second control module monitors the power information and total power information of each of the electric-driven fracturing equipment in real time and sends it to the first control module; the first control module is connected to each of the power generation units, and the first control module is used to: during the fracturing well site operation, determine and disconnect some outgoing line circuit breakers based on the total output power of the multiple groups of power generation units.

[0013] In some embodiments, the first control module is configured to, when the total output power of the multiple power generation units is less than the total power of the electric-driven fracturing equipment, sequentially disconnect each outgoing circuit breaker until the total output power is no less than the total power.

[0014] In some embodiments, the first control module is configured to: when the total output power of the multiple groups of power generation units is less than the total power of the electric-driven fracturing equipment, the first control module sequentially selects to disconnect an outlet circuit breaker from each power distribution device; when all power distribution devices disconnect an outlet circuit breaker but the total output power is still less than the total power, repeatedly selects to disconnect an outlet circuit breaker from each power distribution device in sequence.

[0015] In some embodiments, the electric-driven fracturing equipment includes an electric motor and a fracturing pump driven by the electric motor; and / or the power generation unit includes at least one of an internal combustion engine generator set, a solar panel, and an energy storage device.

[0016] According to another aspect of the present application, a fracturing well site system includes multiple wells; in the fracturing well site system, the multiple electric-driven fracturing devices in each group of electric-driven fracturing devices are divided into multiple groups to supply different wells respectively.

[0017] According to another aspect of the present application, a method for supplying power to a fracturing well site includes the steps of: connecting multiple groups of power generation units to the incoming lines of multiple groups of power distribution equipment, the outgoing lines of each power distribution equipment including multiple outgoing line switch cabinets each having an outgoing line circuit breaker; electrically connecting multiple groups of electric-driven fracturing equipment to the outgoing lines of the multiple groups of power distribution equipment correspondingly and supplying multiple wells, wherein each group of the electric-driven fracturing equipment includes multiple electric-driven fracturing equipment, each of the electric-driven fracturing equipment is respectively connected to one of the outgoing line circuit breaker, and the multiple electric-driven fracturing equipment in each group of the electric-driven fracturing equipment is supplied to different wells.

[0018] In some embodiments, the method further includes the step of disconnecting the outgoing circuit breaker of the corresponding power distribution equipment according to the opening state of the outlet circuit breaker of the power generation unit.

[0019] In some embodiments, the method further includes the steps of: monitoring and acquiring information of unactivated power generation units in the plurality of groups of power generation units; and disconnecting the outgoing line circuit breakers corresponding to the unactivated power generation units.

[0020] In some embodiments, the method further includes the steps of: obtaining power information and total power information of each of the electric-driven fracturing devices; and determining and disconnecting some outgoing line circuit breakers based on the total output power of the multiple groups of power generation units during fracturing well site operations.

[0021] In some embodiments, during a fracturing well site operation, determining and disconnecting some outgoing line circuit breakers based on the total output power of the multiple groups of power generation units includes: when the total output power of the multiple groups of power generation units is less than the total power of the electric-driven fracturing equipment, disconnecting each outgoing line circuit breaker in sequence until the total output power is not less than the total power; or, when the total output power of the multiple groups of power generation units is less than the total power of the electric-driven fracturing equipment, selecting one outgoing line circuit breaker from each power distribution device in sequence to disconnect; when all power distribution devices disconnect one outgoing line circuit breaker but the total output power is still less than the total power, repeatedly selecting one outgoing line circuit breaker from each power distribution device in sequence to disconnect.

[0022] In this application, by adopting power generation units, electric-driven fracturing equipment, etc. to form a fully electrified well site, the investment in well site equipment is reduced, the economy of fuel use is improved, the well site operation process is optimized, and at the same time the area used in the fracturing well site is reduced, the well site noise is reduced, and pollutant emissions are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the fracturing well site system of Example 1 of the present application.

[0024] Figure 2 This is a schematic diagram of the fracturing well site system of Example 2 of the present application.

[0025] Figure 3 This is a schematic diagram of the fracturing well site system of Example 3 of the present application.

[0026] Figure 4 This is a schematic diagram of the fracturing well site system of Example 4 of the present application.

[0027] Figure 5 Schematic diagram of the flow of the power supply method for a fracturing well site according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 10. Power distribution equipment; 110. Incoming line; 120. Outgoing line; 121. Outgoing line circuit breaker; 130. Busbar 130; 20. Power generation unit; 210. Outlet circuit breaker; 30. Electric fracturing equipment; 310. High-pressure pipeline; 40. Auxiliary equipment; 410. Sand mixing equipment; 420. Low-pressure pipeline; 50. Auxiliary power supply; 510. Automatic transfer switch; 60. Well; 70. Power generation monitoring center; 710. First control module; 720. Ethernet cable; 80. Fracturing monitoring center; 810. Second control module. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] This application proposes a fracturing wellsite power supply system, which is applied to a fracturing wellsite to construct a fracturing wellsite system. The system includes power generation equipment and power consumption equipment. The power generation equipment supplies power to the power consumption equipment. The power generation equipment includes power distribution equipment and power generation units. The power consumption equipment includes at least electrically driven fracturing equipment.

[0036] In this application, on the one hand, by adopting generator sets, electric-driven fracturing equipment, etc. to form a fully electrified well site, the investment in well site equipment is reduced, the economy of fuel use is improved, the well site operation process is optimized, and at the same time the area used in the fracturing well site is reduced, the well site noise is reduced, and pollutant emissions are reduced.

[0037] On the other hand, when full-voltage fracturing operations are carried out, in order to avoid the shutdown of all generator sets during the fracturing operation and the resulting well blockage accidents, the power generation units and electric-driven fracturing equipment are grouped separately. When a power generation unit fails, it does not affect other power generation units. In this way, the power supply task can be completed while avoiding well blockage accidents.

[0038] The fracturing well site power supply system and the fracturing well site system provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0039] Example 1

[0040] Embodiment 1 provides a fracturing well site power supply system and a fracturing well site system constructed based on the fracturing well site power supply system.

[0041] refer to Figure 1 The fracturing well site power supply system provided in the first embodiment includes: a plurality of power distribution equipment 10, each power distribution equipment 10 includes an incoming line portion 110 and an outgoing line portion 120, and the outgoing line portion 120 includes a plurality of outgoing line switch cabinets each having an outgoing line circuit breaker 121; a plurality of power generation units 20, the plurality of power generation units 20 are electrically connected to the incoming line portions 110 of the plurality of power distribution equipment 10; a plurality of electric-driven fracturing equipment 30, which are electrically connected to the outgoing line portions 120 of the plurality of power distribution equipment 10, each group of electric-driven fracturing equipment 30 includes a plurality of electric-driven fracturing equipment 30, and each electric-driven fracturing equipment 30 is respectively connected to one of the outgoing line circuit breakers 121 (see Figure 2 ).

[0042] Unless otherwise specified, in this application, when referring to multiple groups or a plurality, it means that the quantity is at least two. Multiple groups refers to two or more groups, and a plurality refers to two or more.

[0043] The power distribution unit 10 (power distribution unit) is used to supply the power of the power generation unit 20 to the electric drive fracturing equipment 30. Figure 1 As shown, the incoming portion 110 of each power distribution device 10 includes multiple incoming switchgear cabinets, each of which has an incoming circuit breaker. The multiple incoming circuit breakers of the incoming portion 110 of each power distribution device 10 are sequentially numbered CB1 to x, and may also be referred to as the first incoming circuit breaker, the second incoming circuit breaker, ..., the Xth incoming circuit breaker. The outgoing portion 120 includes multiple outgoing switchgear cabinets, each of which includes an outgoing circuit breaker 121. The multiple outgoing circuit breakers 121 of the outgoing portion 120 of each power distribution device 10 are sequentially numbered CB1 to y, and may also be referred to as the first outgoing circuit breaker, the second outgoing circuit breaker, ..., the Yth outgoing circuit breaker.

[0044] The power generation unit 20 can be of any appropriate type, and the embodiments of the present application do not specifically limit this. The power generation unit 20 includes, for example, at least one of an internal combustion engine generator set, a solar power generation panel, and an energy storage device. Optionally, the types of the power generation units 20 in each group are different. Each group of power generation units 20 includes at least one power generation source. At least one power generation source is connected in parallel or in parallel. In addition, the power generation unit 20 can be a combination of one or more forms such as vehicle-mounted, movable skid-mounted, semi-trailer-mounted, etc., and the embodiments of the present application do not specifically limit this.

[0045] The electric-driven fracturing device 30 is configured, for example, to pressurize low-pressure fracturing fluid and deliver it to the formation below the well 60. For example, the electric-driven fracturing device 30 may include an electric motor and a fracturing pump. The electric-driven fracturing device 30 may be skid-mounted, vehicle-mounted, or semi-trailer-mounted. The electric motor may be controlled by a frequency converter. The frequency converter may include a frequency converter that is connected to and controls the electric motor on the electric-driven fracturing device 30. The frequency converter may also be skid-mounted, vehicle-mounted, or semi-trailer-mounted. The fracturing pump may be, for example, a plunger pump.

[0046] The electric fracturing equipment 30 may also include a lubrication device. The lubrication device may include, for example, an electric motor, a lubrication pump, a lubrication oil tank, and a radiator. The lubrication pump delivers lubricating oil from the lubrication oil tank to the radiator for heat dissipation, and then delivers the lubricating oil after heat dissipation to the fracturing pump.

[0047] In addition, if Figure 1As shown, the fracturing well site power supply system also includes auxiliary equipment 40. The auxiliary equipment 40 can supply power to all the electric-driven fracturing equipment 30. The auxiliary equipment 40 includes, for example, a sand mixing device 410, which supplies power to all the electric-driven fracturing equipment 30 through a low-pressure pipeline 420.

[0048] The auxiliary equipment 40 also includes, for example, a fluid mixing and supply device and a sand supply device. In some cases, the fracturing fluid injected into the well 60 is a sand-carrying fluid, which is suspended in the fracturing fluid by mixing water, sand, and chemical additives. For example, clean water and chemical additives can be mixed in the fluid mixing and supply device to form a mixed liquid. The mixed liquid in the fluid mixing and supply device and the sand in the sand supply device are then mixed together in the sand mixing device to form the sand-carrying fracturing fluid required for the operation. The sand mixing device 410 delivers the resulting low-pressure fracturing fluid to the fluid inlet of the electric fracturing device 30. The electric fracturing device 30 pressurizes the low-pressure fracturing fluid and then delivers it to the high-pressure pipeline 310.

[0049] In this embodiment, the fracturing well site system further includes a power generation monitoring center 70 and a fracturing monitoring center 80 , which are used to monitor the working status of each power generation unit 20 and the working status of each electric-driven fracturing equipment 30 , respectively.

[0050] In the present application, multiple groups of power generation units 20 can be divided into groups A, B...N, and multiple groups of electric-driven fracturing equipment 30 can be divided into groups a, b...n; multiple groups of power distribution equipment 10 can be divided into groups (1), (2)...(X), and multiple wells 60 can be divided into well I, well II...well X. Specifically, taking the example of the power generation units 20 being divided into groups A and B and the electric-driven fracturing equipment 30 being divided into groups a and b, the working principle of the fracturing well field power supply system of the embodiment of the present application is described in detail.

[0051] The power generation unit 20 of group A is connected to the multiple incoming circuit breakers CB1~x of the (1) group power distribution equipment 10, and the multiple outgoing circuit breakers 121 (CB1~y) of the (1) group power distribution equipment 10 are connected to each electric-driven fracturing device 30 in group a of electric-driven fracturing devices 30. Similarly, the power generation unit 20 of group B is connected to the multiple incoming circuit breakers CB1~x of the (2) group power distribution equipment 10, and the multiple outgoing circuit breakers 121 (CB1~y) of the (2) group power distribution equipment 10 are connected to each electric-driven fracturing device 30 in group b of electric-driven fracturing devices 30.

[0052] For example, there are two wells 60, namely Well I and Well II. In group a, some of the electric fracturing equipment 30 is supplied to Well I, and the remaining is supplied to Well II. In group b, some of the electric fracturing equipment 30 is supplied to Well I, and the remaining is supplied to Well II.

[0053] Specifically, the number of electric-driven fracturing devices 30 in group a is, for example, 4. The number of electric-driven fracturing devices 30 in group b is, for example, 4. Of the 4 electric-driven fracturing devices 30 in group a, 2 electric-driven fracturing devices 30 supply well I, and the other 2 electric-driven fracturing devices 30 supply well II. Of the 4 electric-driven fracturing devices 30 in group b, 2 electric-driven fracturing devices 30 supply well I, and the other 2 electric-driven fracturing devices 30 supply well II.

[0054] For Wells I and II: Well I 60 is equipped with four electrically driven fracturing devices 30, and these four electrically driven fracturing devices 30 are powered by Group A power generation units 20 and Group B power generation units 20. Well II is equipped with four electrically driven fracturing devices 30, and these four electrically driven fracturing devices 30 are also powered by Group A power generation units 20 and Group B power generation units 20. This way, if Group A power generation units 20 or Group B power generation units 20 malfunction and shut down, both Wells I and II will still have a group of power generation units 20 providing power, preventing well blockage.

[0055] In the present application, by grouping the power generation units 20 and the electric-driven fracturing equipment 30, the electric-driven fracturing equipment 30 is divided into two or more groups of independent equipment that operate independently. The regional division allows the power supply of the electric-driven fracturing equipment 30 to each well 60 to be not limited to one power generation unit 20, but the independent power supply of each power generation equipment does not interfere with each other. When any power generation unit 20 fails, it does not affect other power generation units 20, thereby completing the power supply task while avoiding well blockage accidents. When the power generation units 20 and the electric-driven fracturing equipment 30 are divided into two or more groups, the principles are similar, and so on and so forth, and will not be repeated here.

[0056] Furthermore, multiple sets of auxiliary power supplies 50 are connected to the automatic transfer switch 510, and selectively supply power to the auxiliary equipment 40 simultaneously through the automatic transfer switch 510. The multiple sets of auxiliary power supplies 50 supply power to the auxiliary equipment 40 shared by each electric-driven fracturing equipment 30 through the automatic transfer switch 510.

[0057] For example, the automatic transfer switch 510 connects two auxiliary power supplies 50, group A and group B. When the auxiliary power supply 50 of group A fails, it immediately switches to the auxiliary power supply 50 of group B that has not failed, so that the auxiliary equipment 4040 can be quickly restored.

[0058] The fracturing well site system of this embodiment includes the above-mentioned fracturing well site power supply system and multiple wells 60. The multiple electric-driven fracturing devices 30 in each group are divided into multiple groups to supply different wells 60 respectively.

[0059] Example 2

[0060] like Figure 2As shown, the second embodiment is further improved on the basis of the first embodiment. Specifically, in the second embodiment, the incoming line parts 110 of each power distribution device 10 are connected in parallel through the busbar 130. In this way, each power distribution device 10 is connected to the power generation unit 20 of groups A, B...N. Multiple groups of power generation units 20 are connected in parallel to supply power. In this embodiment, the outlet circuit breaker 210 ( Figure 2 The CB in the figure is connected to the incoming circuit breaker of each power distribution device 10. The auxiliary equipment 40, such as the sand mixing equipment, can be connected to one of the outgoing circuit breakers 121 of any power distribution device 10.

[0061] Exemplary:

[0062] The auxiliary equipment 40 is connected to CB1 (the first outlet circuit breaker) of the (1) group power distribution equipment 10. If a fault occurs in the power generation unit 20 of the group A, the outlet circuit breaker 210 of the power generation unit 20 of the group A is opened. At this time, the opening state of the outlet circuit breaker 210 of the power generation unit 20 of the group A can disconnect CB2~y of the (1) group power distribution equipment 10 connected to the part a electric drive equipment, that is, disconnect the second outlet circuit breaker 121, the third outlet circuit breaker 121...the Yth outlet circuit breaker 121 of the (1) group power distribution equipment 10, thereby disconnecting the part a electric drive fracturing equipment 3010. The opening state of the outlet circuit breaker 210 of each power generation unit 20 can be monitored by the power generation monitoring center 70.

[0063] If a fault occurs in the power generation unit 20 of group B, the outlet circuit breaker 210 of the power generation unit 20 of group B is opened. At this time, the outlet circuit breaker CB2~y of the (2) group of power distribution equipment 10 connected to the electric drive equipment of part B can be disconnected through the open state of the outlet circuit breaker 210 of the power generation unit 20 of group B, that is, the second outlet circuit breaker, the third outlet circuit breaker...the Yth outlet circuit breaker of the (2) group of power distribution equipment 10 are disconnected, thereby disconnecting the electric drive fracturing equipment 30 of part B. If a fault occurs in the power generation unit 20 of group N, the same applies.

[0064] It should be pointed out that in this embodiment, each group of power generation units 20 realizes parallel power supply. Therefore, taking the failure of group A power generation unit 20 as an example, at this time, the outgoing line circuit breaker CB2~y of group (2) power distribution equipment 10 can also be disconnected, so as to disconnect part b of the electric-driven fracturing equipment 30.

[0065] In the above manner, when a group of power generation units 20 fails, the outgoing line circuit breaker 121 of the power distribution equipment 10 can be controlled to be disconnected, thereby achieving load shedding.

[0066] In this embodiment, the power interface of the auxiliary device 40 can be connected to an outgoing circuit breaker 121 of any power distribution device 10. A failure in any generator set will not disconnect the power supply to the auxiliary device 40, and the auxiliary device 40 will always be powered. Furthermore, the power supply method for the auxiliary device 40 in this embodiment can be the same as that in the first embodiment, namely, using the auxiliary power supply 50 of the first embodiment.

[0067] Example 3

[0068] like Figure 3 As shown, the third embodiment is obtained by further improving the second embodiment. Specifically, the difference between the third embodiment and the second embodiment is:

[0069] In the third embodiment, a first control module 710 is further included. The first control module 710 is connected to each power generation unit 20 and is configured with a mapping relationship between multiple groups of power generation units 20 and all outgoing line circuit breakers 121. During the fracturing well site operation, the first control module 710 obtains information about the inactive power generation units 20 in the multiple groups of power generation units 20 and disconnects the outgoing line circuit breakers 121 corresponding to the inactive power generation units 20.

[0070] The first control module 710 is specifically disposed in the power generation monitoring center 70. The first control module 710 is connected to each power distribution device 10 and power generation unit 20 via wired or wireless communication. Optionally, the first control module 710 is connected to each power distribution device 10 and power generation unit 20 via an Ethernet cable 720. Optionally, the power supply method for the auxiliary device 40 is the same as that in the second embodiment and will not be further described. The activation status information of the power generation unit 20 can be obtained by monitoring the status of its outlet circuit breaker 210.

[0071] In this embodiment, each power generation unit 20 is pre-grouped based on its maximum power and the power consumption of the electric-driven fracturing equipment 30, and a mapping relationship is established. Specifically, the controller pre-assigns groups A, B, and N of power generation units 20 to match the corresponding outgoing circuit breakers 121 of the power distribution equipment 10. Generally, the maximum output power of each power generation unit 20 varies, and each power generation unit 20 is matched with a different number of electric-driven fracturing equipment 30 of corresponding power. The circuit breaker signals of each power generation unit 20 can be arbitrarily grouped across the outgoing circuit breakers 121 of the power distribution equipment 10.

[0072] For example, assuming that the power of the power generation unit 20 of group A is smaller than the power of the power generation unit 20 of group B, the power generation unit 20 of group B can be interlocked with more outgoing line circuit breakers 121. Assume that the auxiliary equipment 40 is connected to CB1 of the (1) group distribution equipment 10, that is, connected to the first outgoing line circuit breaker of the (1) group distribution equipment 10. At this time, the power generation unit 20 of group A can be pre-set to interlock with CB2~3 of the outgoing line part 120 of the (1) group distribution equipment 10, that is, interlock with the second and third outgoing line circuit breakers of the (1) group distribution equipment 10. The B group power generation unit 20 interlocks the outgoing circuit breakers CB4~y of the (1) group power distribution equipment 10, that is, interlocks the fourth outgoing circuit breaker to the yth outgoing circuit breaker of the (1) group power distribution equipment 10, and at the same time interlocks the outgoing circuit breakers CB4~y of the (2) group power distribution equipment 10 and the outgoing circuit breakers CB1~2 of the (X) group power distribution equipment 10; the N generator group interlocks the outgoing circuit breakers CB4~y of the (2) group power distribution equipment 10.

[0073] In this embodiment, if a power generation unit 20 fails, the controller automatically disconnects the corresponding outgoing line circuit breaker 121 according to pre-set grouping settings, thereby shedding the load. This ensures that if one or more power generation units 20 fail, the load of the subsequently connected electric-driven fracturing equipment 30 will not be transferred to the remaining healthy power generation units 20, ensuring that well operations can continue without causing well blockage.

[0074] Example 4

[0075] like Figure 4 As shown, the fourth embodiment is obtained by further improving the second embodiment. Specifically, the difference between the fourth embodiment and the third embodiment is:

[0076] The fracturing wellsite power supply system includes both a first control module 710 and a second control module 810. The second control module 810 is connected to each electrically driven fracturing device 30 and the first control module 710 via wired or wireless communication. The second control module 810 monitors the power and total power information of each electrically driven fracturing device 30 in real time and transmits it to the first control module 710. The first control module 710 is connected to each power generation unit 20 and is used to determine and disconnect a portion of the outgoing line circuit breakers 121 based on the total output power of multiple power generation units 20 during fracturing wellsite operations.

[0077] The second control module 810 is provided in the fracturing monitoring center 80 . The second control module 810 reads the real-time power of all the electric-driven fracturing equipment 30 , accumulates the total power, and sends the data to the first control module 710 .

[0078] Similar to the second and third embodiments, the auxiliary device 40 in this embodiment can be connected to one of the outgoing circuit breakers 121 of any power distribution device 10. No matter which generator set fails, the power supply to the auxiliary device 40 will not be disconnected, and the auxiliary device 40 will always be powered.

[0079] Each power distribution device 10 can be connected to each group of electric-driven fracturing equipment 30 in an interval connection manner, that is, (1) group power distribution equipment 10 is connected to group a electric-driven fracturing equipment 30, (2) group power distribution equipment 10 is connected to group b electric-driven fracturing equipment 30, and so on.

[0080] When a power generation unit 20 fails, the first control module 710 automatically calculates the maximum output power capacity of the remaining power generation units 20 and compares it with the total power sent from the second control module 810 to determine how many outgoing line circuit breakers 121 need to be disconnected, thereby ensuring that the load end power does not exceed the maximum output power of the remaining power generation units 20.

[0081] In some embodiments, the first control module 710 is configured to, when the total output power of the multiple power generation units 20 is less than the total power of the electric-driven fracturing equipment 30, sequentially disconnect the outgoing circuit breakers 121 until the total output power is no less than the total power. Specifically, the controller is pre-configured with the order of the outgoing circuit breakers 121, automatically disconnecting each outgoing circuit breaker 121 according to the order from smallest to largest.

[0082] This ensures that when one or more power generation units 20 fail, the load of the subsequent electric-driven fracturing equipment 30 will not be transferred to the remaining fault-free power generation units 20, ensuring that the well site continues to operate without causing well blockage.

[0083] Exemplary, reference Figure 4 , assuming that the auxiliary equipment 40 is connected to CB1 of the (1) group of distribution equipment 10, that is, connected to the first outgoing line circuit breaker of the (1) group of distribution equipment 10. Each distribution equipment 10 has 10 outgoing line circuit breakers 121, the power of each electric fracturing equipment 30 is 2MW, and the output power of the power generation unit 20 of group A is 30MW. When a fault occurs in the power generation unit 20 of group A, the first control module 710 needs to disconnect 15 outgoing line circuit breakers 121 according to the calculation, and then the first control module 710 automatically disconnects CB2~10 of the (1) group of distribution equipment 10 and disconnects CB1~6 of the (2) group of distribution equipment 10.

[0084] In this embodiment, the first control module 710 sequentially disconnects each outgoing circuit breaker 121 until the total output power is not less than the total power. Of course, the first control module 710 can disconnect the outgoing circuit breaker 121 according to other algorithm rules.

[0085] For example, the first control module 710 selects to disconnect an outgoing circuit breaker 121 from each power distribution device 10 in turn. When all power distribution devices 10 disconnect an outgoing circuit breaker 121 but the total output power is still less than the total power, it repeats to select to disconnect an outgoing circuit breaker 121 from each power distribution device 10 in turn.

[0086] In this way, after one or more power generation units 20 fail, it can be ensured that as many power distribution devices 10 as possible are put into use at the same time, so that each well 60 can have some electric fracturing equipment 30 to supply the well 60 normally.

[0087] refer to Figure 5 An embodiment of the present application provides a method for powering a fracturing well site, comprising the steps of:

[0088] S100 , connecting multiple groups of power generation units 20 to the incoming line parts 110 of multiple groups of power distribution equipment 10 , respectively. The outgoing line part 120 of each power distribution equipment 10 includes multiple outgoing line switch cabinets each having an outgoing line circuit breaker 121 .

[0089] S200. Electrically connect multiple groups of electric-driven fracturing equipment 30 to the outlet parts 120 of multiple groups of distribution equipment 10 accordingly and supply multiple wells 60, wherein each group of the electric-driven fracturing equipment 30 includes multiple electric-driven fracturing equipment 30, and each electric-driven fracturing equipment 30 is respectively connected to an outlet circuit breaker 121, and the multiple electric-driven fracturing equipment 30 in each group of electric-driven fracturing equipment 30 supply different wells 60.

[0090] refer to Figure 1 By grouping the power generation units 20 and the electric-driven fracturing equipment 30, the electric-driven fracturing equipment 30 is divided into two or more groups of independent equipment that operate independently. The regional division allows the power supply for the electric-driven fracturing equipment 30 of each well 60 to be not limited to one power generation unit 20. However, the independent power supply of each power generation equipment does not interfere with each other. When any power generation unit 20 fails, it will not affect other power generation units 20. Therefore, while completing the power supply task, it can also avoid well blockage accidents.

[0091] refer to Figure 2 In some embodiments, the method further includes the following steps: S300 , disconnecting the corresponding outgoing circuit breaker 121 of the power distribution equipment 10 according to the opening state of the outlet circuit breaker 210 of the power generation unit 20 .

[0092] In this embodiment, when a power generation unit 20 fails, the outlet circuit breaker 210 of that power generation unit 20 is disconnected, and the operator can disconnect the corresponding outgoing circuit breaker 121 of the power distribution device 10. If the outgoing circuit breaker 121 of the corresponding power distribution device 10 is not connected to the auxiliary device 40, all outgoing circuit breakers 121 of the power distribution device 10 are disconnected. If a certain outgoing circuit breaker 121 of the corresponding power distribution device 10 is connected to the auxiliary device 40, the other outgoing circuit breakers 121 of the power distribution device 10 are disconnected.

[0093] refer to Figure 3 In some embodiments, the method further comprises the steps of:

[0094] S400 , monitoring and acquiring information of unactivated power generation units 20 in the plurality of groups of power generation units 20 .

[0095] S500 : Disconnect the outgoing line circuit breaker 121 corresponding to the disabled power generation unit 20 .

[0096] Specifically, in this embodiment, the first control module 710 of the power generation unit 20 monitoring center can obtain information about inactive power generation units 20 (i.e., information about faulty power generation units 20). Specifically, the fault can be determined by the trip status of the outlet circuit breaker 210 of the power generation unit 20. The first control module 710 then disconnects the outlet circuit breaker 121 corresponding to the faulty power generation unit 20.

[0097] refer to Figure 4 In some embodiments, the method further comprises the steps of:

[0098] S600: Obtain power information and total power information of each of the electric-driven fracturing devices 30.

[0099] S700 , during a fracturing well site operation, determining and disconnecting some outgoing line breakers 121 based on the total output power of the multiple groups of power generation units 20 .

[0100] Furthermore, step S700 includes:

[0101] S710: When the total output power of the multiple power generation units 20 is less than the total power of the electric-driven fracturing equipment 30, disconnect each outgoing circuit breaker 121 in sequence until the total output power is no less than the total power. Specifically, the first control module 710 disconnects each outgoing circuit breaker 121 in sequence until the total output power is no less than the total power.

[0102] Alternatively, step S700 includes:

[0103] S720 : When the total output power of the multiple power generation units 20 is less than the total power of the electric-driven fracturing equipment 30 , disconnect one outgoing circuit breaker 121 from each power distribution equipment 10 in turn.

[0104] S730 : When all the power distribution devices 10 have disconnected one outgoing circuit breaker 121 but the total output power is still less than the total power, repeatedly disconnect one outgoing circuit breaker 121 from each power distribution device 10 in sequence.

[0105] In this embodiment, when a power generation unit 20 fails, the first control module 710 automatically calculates the maximum output power capacity of the remaining power generation units 20, compares it with the total power sent from the second control module 810, and determines how many outgoing line circuit breakers 121 need to be disconnected, thereby ensuring that the load-end power does not exceed the maximum output power of the remaining power generation units 20. This ensures that if one or more power generation units 20 fail, the subsequent load of the electric-driven fracturing equipment 30 will not be transferred to the remaining healthy power generation units 20, ensuring that operations at the well site can continue without causing well blockage.

[0106] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A fracturing well site power supply system, characterized in that: include: Multiple groups of power distribution equipment, each power distribution equipment includes an incoming line portion and an outgoing line portion, and the outgoing line portion includes a plurality of outgoing line switch cabinets each having an outgoing line circuit breaker; A plurality of groups of power generation units, wherein the plurality of groups of power generation units are electrically connected to the plurality of groups of incoming line parts of the power distribution equipment; Multiple groups of electric-driven fracturing equipment are electrically connected to the outgoing line parts of multiple groups of power distribution equipment. Each group of the electric-driven fracturing equipment includes multiple electric-driven fracturing equipment, and each of the electric-driven fracturing equipment is respectively connected to one of the outgoing line circuit breakers.

2. The fracturing well site power supply system according to claim 1, characterized in that: Also includes: auxiliary equipment; and Multiple groups of auxiliary power supplies are connected to the automatic transfer switch, and power is selectively supplied to the auxiliary equipment through the automatic transfer switch.

3. The fracturing well site power supply system according to claim 1, characterized in that: The incoming lines of multiple groups of the power distribution equipment are connected in parallel via busbars.

4. The fracturing well site power supply system according to claim 3, characterized in that: The fracturing well site power supply system further includes auxiliary equipment, wherein an input end of the auxiliary equipment is connected to one of the outgoing line circuit breakers.

5. The fracturing well site power supply system according to claim 3, characterized in that: The fracturing well site power supply system also includes a first control module, which is connected to each of the power generation units. The first control module is configured with a mapping relationship between multiple groups of the power generation units and all outgoing circuit breakers. The first control module is used to: during the fracturing well site operation, monitor and obtain information about unactivated power generation units in the multiple groups of the power generation units, and disconnect the outgoing circuit breakers corresponding to the unactivated power generation units.

6. The fracturing well site power supply system according to claim 3, characterized in that: The fracturing well site power supply system further includes a first control module and a second control module; The second control module is connected to each of the electric-driven fracturing devices and the first control module, and the second control module monitors the power information and total power information of each of the electric-driven fracturing devices in real time and sends the information to the first control module; The first control module is connected to each of the power generation units, and is used to determine and disconnect some outgoing line breakers based on the total output power of the multiple groups of power generation units during the fracturing well site operation.

7. The fracturing well site power supply system according to claim 6, characterized in that: The first control module is configured to, when the total output power of the multiple power generation units is less than the total power of the electric-driven fracturing equipment, sequentially disconnect the outgoing circuit breakers until the total output power is no less than the total power.

8. The fracturing well site power supply system according to claim 6, characterized in that: The first control module is used to: when the total output power of the multiple groups of power generation units is less than the total power of the electric-driven fracturing equipment, the first control module selects to disconnect an outgoing circuit breaker from each distribution device in turn; when all distribution devices disconnect an outgoing circuit breaker but the total output power is still less than the total power, repeatedly select to disconnect an outgoing circuit breaker from each distribution device in turn.

9. The fracturing well site power supply system according to claim 1, characterized in that: The electric-driven fracturing equipment includes an electric motor and a fracturing pump driven by the electric motor; and / or the power generation unit includes at least one of an internal combustion engine generator set, a solar power generation panel and an energy storage device.

10. A fracturing well site system, characterized in that: multiple wells; The fracturing well site system according to any one of claims 1 to 9, wherein the multiple electric-driven fracturing devices in each group of electric-driven fracturing devices are divided into multiple groups for supplying different wells respectively.

11. A method for powering a fracturing well site, characterized in that: Including steps: Connecting the plurality of power generation units to the incoming line parts of the plurality of power distribution equipment respectively, wherein the outgoing line part of each power distribution equipment includes a plurality of outgoing line switch cabinets each having an outgoing line circuit breaker; Multiple groups of electric-driven fracturing equipment are electrically connected to the outgoing lines of multiple groups of power distribution equipment and supplied to multiple wells, wherein each group of the electric-driven fracturing equipment includes multiple electric-driven fracturing equipment, each of the electric-driven fracturing equipment is respectively connected to one of the outgoing line circuit breakers, and the multiple electric-driven fracturing equipment in each group of the electric-driven fracturing equipment are supplied to different wells.

12. The method for powering a fracturing well site according to claim 11, characterized in that: Also includes the steps: The outgoing circuit breaker of the corresponding power distribution equipment is disconnected according to the opening state of the outlet circuit breaker of the power generation unit.

13. The method for powering a fracturing well site according to claim 11, characterized in that: Also includes the steps: Monitoring and obtaining information of unactivated power generation units in the plurality of groups of power generation units; The outgoing line circuit breaker corresponding to the disabled power generation unit is opened.

14. The method for powering a fracturing well site according to claim 11, wherein: Also includes the steps: Obtaining power information and total power information of each of the electric-driven fracturing devices; During the fracturing well site operation, some outgoing line breakers are determined and disconnected based on the total output power of the multiple groups of power generation units.

15. The method for powering a fracturing well site according to claim 14, characterized in that: During the fracturing well site operation, determining and disconnecting some outgoing line circuit breakers based on the total output power of the multiple groups of power generation units includes: When the total output power of the multiple groups of power generation units is less than the total power of the electric-driven fracturing equipment, disconnecting each outgoing circuit breaker in sequence until the total output power is not less than the total power; or, When the total output power of the multiple groups of power generation units is less than the total power of the electric-driven fracturing equipment, disconnecting one outgoing circuit breaker from each power distribution equipment in turn; When all the power distribution devices have one outgoing circuit breaker disconnected but the total output power is still less than the total power, one outgoing circuit breaker is repeatedly selected from each power distribution device to disconnect in turn.

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