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

Abstract

The application relates to a fracturing well site power supply system, a fracturing well site system and a fracturing well site power supply method, which comprise: multiple groups of power distribution equipment, each group of power distribution equipment comprising an incoming line part and an outgoing line part, the outgoing line part comprising multiple outgoing line switch cabinets each having an outgoing line circuit breaker; multiple groups of power generation units, the multiple groups of power generation units being electrically connected to the incoming line parts of the multiple groups of power distribution equipment in correspondence; and multiple groups of electrically-driven fracturing equipment, the multiple groups of electrically-driven fracturing equipment being electrically connected to the outgoing line parts of the multiple groups of power distribution equipment in correspondence, each group of the electrically-driven fracturing equipment comprising multiple electrically-driven fracturing devices, and each electrically-driven fracturing device being connected to one outgoing line circuit breaker. By grouping the power generation units and the electrically-driven fracturing devices respectively, the power supply sources of the electrically-driven fracturing devices of each well are not limited to one power generation unit, so that when a certain power generation unit fails, other power generation units are not affected, thereby completing the power supply task while avoiding causing well plugging accidents.

Description

Technical Field

[0001] This application relates to the technical field of oil and gas field fracturing, and in particular to a power supply system for fracturing well sites, a fracturing well site system, and a power supply method for fracturing well sites. Background Technology

[0002] Currently, traditional oilfield fracturing operations use diesel engines to drive plunger pumps. Due to the advantages of electric motors, such as low cost, low noise, and high power density, electric fracturing using electric motors to drive plunger pumps is gradually becoming the mainstream method. However, using electric motors requires a power source. Existing solutions include direct connection to the power grid, but grid installation is time-consuming and costly; furthermore, the power required for well site operations is large and cannot meet the short-term high-power load demands during fracturing operations, as the power grid capacity is insufficient. Therefore, utilizing vehicle-mounted mobile generator sets to provide power to the electric motors driving the plunger pumps at oilfield fracturing well sites has become a new approach.

[0003] In some smaller well sites, electric fracturing operations are carried out using a combination of mobile generator sets and electrically driven fracturing equipment. Compared to traditional diesel generator sets, this method has a higher power density, resulting in a smaller well site layout area. It also reduces noise and emissions during operation. The entire fracturing well site uses a single generator set; if this generator set malfunctions and shuts down, it will cause a power outage at the well site. If the fracturing operation is in the sand-addition phase, it can also lead to well blockage.

[0004] As well sites grow larger and their power demands increase, a single generator set may not be sufficient to meet the operational needs of some high-power well sites. To ensure smooth operations, multiple generator sets often need to be used in parallel at the fracturing well site. In this situation, if one generator set malfunctions and shuts down, the load will immediately shift to other operating generators, causing them to overload and eventually shut down, resulting in a complete power outage at the well site. If the fracturing operation is in the sand-addition phase, this could also lead to well blockage.

[0005] To prevent well blockage during fracturing operations due to generator power outages, fracturing sites now utilize a combination of diesel-driven and electric-driven equipment. When the electric-driven fracturing equipment shuts down due to a power outage, the diesel-driven fracturing can continue. This method avoids sand blockage accidents caused by sudden generator power failures. While this improves efficiency to some extent, it doesn't significantly reduce the footprint and noise levels of fully electric fracturing sites, and its economic advantages haven't been maximized. Summary of the Invention

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

[0007] According to one aspect of this application, a power supply system for a fracturing well site includes: multiple sets of power distribution equipment, each power distribution equipment including an incoming line section and an outgoing line section, the outgoing line section including multiple outgoing switch cabinets, each having an outgoing circuit breaker; multiple sets of power generation units, the multiple sets of power generation units being electrically connected to the incoming line sections of the multiple sets of power distribution equipment; and multiple sets of electrically driven fracturing equipment, electrically connected to the outgoing line sections of the multiple sets of power distribution equipment, each set of electrically driven fracturing equipment including multiple electrically driven fracturing devices, each of the electrically driven fracturing devices being connected to one of the outgoing circuit breakers.

[0008] In some embodiments, auxiliary devices are also included; and multiple auxiliary power supplies are connected to an automatic transfer switch and selectively supply power to the auxiliary devices via the automatic transfer switch.

[0009] In some embodiments, the incoming lines of multiple sets 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, the input of which is connected to one of the outgoing circuit breakers.

[0011] In some embodiments, the power supply system for the fracturing well site 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 sets of the power generation units and all outgoing circuit breakers. The first control module is used to: monitor and obtain information on the power generation units that are not in use among the multiple sets of power generation units during the fracturing well site operation, and disconnect the outgoing circuit breaker corresponding to the power generation unit that is not in use.

[0012] In some embodiments, the power supply system for the fracturing well site further includes a first control module and a second control module; the second control module is connected to each of the electrically 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 electrically driven fracturing devices in real time and sends them 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: determine and disconnect some outgoing circuit breakers based on the total output power of the multiple power generation units during the fracturing well site operation.

[0013] In some embodiments, the first control module is configured to: sequentially disconnect each outgoing circuit breaker until the total output power is not less than the total power when the total output power of the multiple sets of power generation units is less than the total power of the electric fracturing equipment.

[0014] 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 fracturing equipment, the first control module sequentially selects and disconnects one outgoing circuit breaker from each power distribution device; when all power distribution devices disconnect one outgoing circuit breaker but the total output power is still less than the total power, the first control module repeatedly selects and disconnects one outgoing circuit breaker from each power distribution device.

[0015] In some embodiments, the electrically driven fracturing equipment includes an electric motor, 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 this application, a fracturing well site system includes multiple wells; in the fracturing well site system, multiple electrically driven fracturing devices in each group of electrically driven fracturing devices are divided into multiple subgroups for supplying different wells respectively.

[0017] According to another aspect of this application, a method for supplying power to a fracturing well site includes the steps of: connecting multiple sets of power generation units to the incoming lines of multiple sets of power distribution equipment, each power distribution equipment having multiple outgoing switch cabinets with outgoing circuit breakers; electrically connecting multiple sets of electrically driven fracturing equipment to the outgoing lines of the multiple sets of power distribution equipment and supplying power to multiple wells, wherein each set of electrically driven fracturing equipment includes multiple electrically driven fracturing devices, each of the electrically driven fracturing devices is connected to one of the outgoing circuit breakers, and the multiple electrically driven fracturing devices in each set of electrically driven fracturing equipment supply 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 open state of the outgoing circuit breaker of the power generation unit.

[0019] In some embodiments, the method further includes the steps of: monitoring and acquiring information on unactivated power generation units in multiple sets of power generation units; and disconnecting the outgoing circuit breaker corresponding to the unactivated power generation unit.

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

[0021] In some embodiments, during fracturing well site operations, determining and disconnecting some outgoing circuit breakers based on the total output power of the multiple sets of power generation units includes: when the total output power of the multiple sets of power generation units is less than the total power of the electrically driven fracturing equipment, sequentially disconnecting each outgoing circuit breaker until the total output power is not less than the total power; or, when the total output power of the multiple sets of power generation units is less than the total power of the electrically driven fracturing equipment, sequentially selecting and disconnecting one outgoing circuit breaker from each power distribution device; when all power distribution devices have disconnected one outgoing circuit breaker but the total output power is still less than the total power, repeatedly selecting and disconnecting one outgoing circuit breaker from each power distribution device.

[0022] In this application, a fully electrified well site is formed by adopting power generation units, electric fracturing equipment, etc., which reduces the investment in well site equipment, improves the economy of fuel use, optimizes the well site operation process, and at the same time reduces the area used by the fracturing well site, reduces well site noise, and reduces pollutant emissions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the fracturing well site system according to Embodiment 1 of this application.

[0024] Figure 2 This is a schematic diagram of the fracturing well site system according to Embodiment 2 of this application.

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

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

[0027] Figure 5 This is a schematic flowchart of the power supply method for fracturing well sites according to an embodiment of this application.

[0028] Figure label:

[0029] 10. Power distribution equipment; 110. Incoming line section; 120. Outgoing line section; 121. Outgoing circuit breaker; 130. Busbar; 20. Power generation unit; 210. Outgoing circuit breaker; 30. Electrically driven 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 Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] This application proposes a power supply system for fracturing well sites, applied to construct such a system. The system includes generator-end equipment and power-consuming equipment, with the generator-end equipment supplying power to the power-consuming equipment. The generator-end equipment includes power distribution equipment and generator units. The power-consuming equipment includes at least electrically driven fracturing equipment.

[0036] In this application, on the one hand, by adopting generator sets, electric fracturing equipment and other components 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 the area of ​​fracturing well site is reduced, well site noise is reduced, and pollutant emissions are reduced.

[0037] On the other hand, when adopting full-voltage fracturing operations, in order to avoid well blockage accidents caused by the complete shutdown of the generator set during the fracturing operation, the power generation unit and the electric drive fracturing equipment are grouped separately. This way, if a power generation unit fails, it will not affect other power generation units, thereby completing the power supply task while avoiding well blockage accidents.

[0038] The following is a detailed description of the power supply system and fracturing well site system provided in the embodiments of this application, with reference to the accompanying drawings.

[0039] Example 1

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

[0041] refer to Figure 1 The power supply system for fracturing well sites provided in Embodiment 1 includes: multiple sets of power distribution equipment 10, each power distribution equipment 10 including an incoming line section 110 and an outgoing line section 120, the outgoing line section 120 including multiple outgoing switch cabinets, each having an outgoing circuit breaker 121; multiple sets of power generation units 20, the multiple sets of power generation units 20 being electrically connected to the incoming line sections 110 of the multiple sets of power distribution equipment 10; and multiple sets of electrically driven fracturing equipment 30, which are electrically connected to the outgoing line sections 120 of the multiple sets of power distribution equipment 10, each set of electrically driven fracturing equipment 30 including multiple electrically driven fracturing equipment 30, each electrically driven fracturing equipment 30 being connected to one of the aforementioned outgoing circuit breakers 121 (see...). Figure 2 ).

[0042] Unless otherwise specified, when this application involves multiple groups or multiple items, the quantity refers to at least two. Multiple groups refer to two or more types, and multiple items refer to two or more items.

[0043] The power distribution unit 10 is used to supply electrical energy from the power generation unit 20 to the electrically driven fracturing equipment 30. For example... Figure 1 As shown, each power distribution device 10's incoming line section 110 includes multiple incoming switch cabinets, each incoming switch cabinet having one incoming circuit breaker. The multiple incoming circuit breakers of each power distribution device 10's incoming line section 110 are sequentially numbered CB1~x, and can also be referred to as the first incoming circuit breaker, the second incoming circuit breaker, ..., the Xth incoming circuit breaker. The outgoing line section 120 includes multiple outgoing switch cabinets, each outgoing switch cabinet including one outgoing circuit breaker 121. The multiple outgoing circuit breakers 121 of each power distribution device 10's outgoing line section 120 are sequentially numbered CB1~y, or can 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 have any suitable type, and this application embodiment does not specifically limit it. The power generation unit 20 includes, for example, at least one of an internal combustion engine generator set, a solar panel, and an energy storage device. Optionally, the types of each group of power generation units 20 are different. Each group of power generation units 20 includes at least one power source. The at least one power source is connected in parallel or arranged in parallel. Furthermore, the power generation unit 20 can adopt one or more forms such as vehicle-mounted, mobile skid-mounted, semi-trailer-mounted, etc., and this application embodiment does not specifically limit it.

[0045] The electrically driven fracturing unit 30 is configured, for example, to pressurize low-pressure fracturing fluid and deliver it to the formation below well 60. For example, the electrically driven fracturing unit 30 may include an electric motor and a fracturing pump, and the electrically driven fracturing unit 30 may be in a skid-mounted, vehicle-mounted, or semi-trailer loading configuration. The electric motor can be controlled by a frequency converter. The frequency converter may include a frequency converter used to connect to and control the electric motor on the electrically driven fracturing unit 30. The frequency converter may also be in a skid-mounted, vehicle-mounted, or semi-trailer loading configuration. The fracturing pump is, for example, a plunger pump.

[0046] The electrically driven fracturing unit 30 may also include a lubrication system. The lubrication system includes, for example, an electric motor, a lubrication pump, a lubrication oil tank, and a radiator. The lubrication pump delivers the lubrication oil from the lubrication oil tank to the radiator for cooling, and then delivers the lubrication oil cooled by the radiator to the fracturing pump.

[0047] In addition, such as Figure 1As shown, the power supply system for the fracturing well site also includes auxiliary equipment 40. Auxiliary equipment 40 can supply power to all electrically driven fracturing equipment 30. Auxiliary equipment 40 includes, for example, sand mixing equipment 410, which supplies power to all electrically driven fracturing equipment 30 via low-pressure pipeline 420.

[0048] Auxiliary equipment 40 may also include, for example, a mixing and supplying fluid device and a sand supply device. In some cases, the fracturing fluid injected into the well 60 is a sand-carrying fluid, which is produced by mixing water, sand, and chemical additives to suspend the sand particles in the fracturing fluid. For example, water and chemical additives can be mixed in the mixing and supplying fluid device to form a mixed fluid. The mixed fluid in the mixing and supplying fluid 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 formed low-pressure fracturing fluid to the inlet of the electrically driven fracturing device 30, which pressurizes the low-pressure fracturing fluid and delivers it to the high-pressure pipeline 310.

[0049] In this embodiment, the fracturing well site system also 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 fracturing device 30, respectively.

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

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

[0052] For example, there are two wells 60, namely well I and well II. Part of the electric fracturing equipment 30 in group a supplies well I, and the remainder supplies well II. Part of the electric fracturing equipment 30 in group b supplies well I, and the remainder supplies well II.

[0053] Specifically, the number of electrically driven fracturing units 30 in group a is, for example, four. The number of electrically driven fracturing units 30 in group b is, for example, four. Of the four electrically driven fracturing units 30 in group a, two supply well I and the other two supply well II. Of the four electrically driven fracturing units 30 in group b, two supply well I and the other two supply well II.

[0054] For Well I and Well II: Well I is equipped with four electrically driven fracturing units 30, and the power supply for these four units includes Group A power generation unit 20 and Group B power generation unit 20. Well II is also equipped with four electrically driven fracturing units 30, and the power supply for these four units also includes Group A power generation unit 20 and Group B power generation unit 20. Thus, if either Group A power generation unit 20 or Group B power generation unit 20 fails and shuts down, both Well I and Well II will still have one power generation unit 20 supplying power, preventing well blockage accidents.

[0055] In this application, by grouping the power generation unit 20 and the electric fracturing equipment 30, and dividing the electric fracturing equipment 30 into two or more independently operating groups, the power supply to the electric fracturing equipment 30 of each well 60 is not limited to a single power generation unit 20. However, each power generation unit supplies power independently without interference. If one power generation unit 20 fails, it will not affect the other power generation units 20. This not only completes the power supply task but also avoids well blockage accidents. When the power generation unit 20 and the electric fracturing equipment 30 are divided into two or more groups, the principle is similar, and so on, without further explanation.

[0056] Furthermore, multiple auxiliary power supplies 50 are connected to an automatic transfer switch 510, and the automatic transfer switch 510 simultaneously supplies power to the auxiliary equipment 40. The multiple auxiliary power supplies 50 supply power to the auxiliary equipment 40 shared by each electrically driven fracturing unit 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 auxiliary power supply 50 of group A fails, it immediately switches to auxiliary power supply 50 of group B, which is not faulty, so as to realize the rapid recovery of auxiliary equipment 4040.

[0058] The fracturing well site system of this embodiment includes the fracturing well site power supply system described above, and multiple wells 60. Each group of electrically driven fracturing equipment 30 is divided into multiple subgroups to supply power to different wells 60.

[0059] Example 2

[0060] like Figure 2As shown, Embodiment Two is a further improvement upon Embodiment One. Specifically, in Embodiment Two, the incoming lines 110 of each power distribution device 10 are connected in parallel via busbar 130. Thus, each power distribution device 10 is connected to a power generation unit 20 of groups A, B...N. Multiple groups of power generation units 20 supply power in parallel. In this embodiment, the output circuit breaker 210 of the power generation unit 20 can be utilized ( Figure 2 The CB in the circuit is connected to the incoming circuit breaker of each power distribution device 10. The auxiliary device 40, such as a sand mixing device, can be connected to one of the outgoing circuit breakers 121 of any power distribution device 10.

[0061] For example:

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

[0063] If the B group power generation unit 20 malfunctions, the output circuit breaker 210 of the B group power generation unit 20 will trip. At this time, through the tripped state of the output circuit breaker 210 of the B group power generation unit 20, the outgoing circuit breakers CB2~y of the (2) group power distribution equipment 10 connected to the B part electric drive equipment can be disconnected, that is, the second outgoing circuit breaker, the third outgoing circuit breaker... the Yth outgoing circuit breaker of the (2) group power distribution equipment 10 can be disconnected, thereby disconnecting the B part electric drive fracturing equipment 30. If the N group power generation unit 20 malfunctions, the same logic applies.

[0064] It should be noted that in this embodiment, each group of power generation units 20 is connected in parallel to supply power. Therefore, taking the failure of group A power generation unit 20 as an example, the outgoing circuit breaker CB2~y of group (2) power distribution equipment 10 can be disconnected, thereby disconnecting part b of the electric fracturing equipment 30.

[0065] In this way, when a fault occurs in a certain group of power generation units 20, the outgoing circuit breaker 121 of the power distribution equipment 10 can be controlled to disconnect, thereby achieving load shedding.

[0066] In this embodiment, the power interface of the auxiliary device 40 can be connected to any outgoing circuit breaker 121 of any power distribution device 10. The power supply to the auxiliary device 40 will not be interrupted regardless of a fault in any generator set, ensuring that the auxiliary device 40 remains powered. Alternatively, the power supply method for the auxiliary device 40 in this embodiment can be the same as in Embodiment 1, i.e., it can be powered using the auxiliary power supply 50 mode of Embodiment 1.

[0067] Example 3

[0068] like Figure 3 As shown, Example 3 is a further improvement upon Example 2. Specifically, the difference between Example 3 and Example 2 is as follows:

[0069] In Embodiment 3, a first control module 710 is further included. The first control module 710 is connected to each power generation unit 20. The first control module 710 is configured with a mapping relationship between multiple sets of power generation units 20 and all outgoing circuit breakers 121. During the fracturing well site operation, the first control module 710 acquires information on the power generation units 20 that are not in use among the multiple sets of power generation units 20, and disconnects the outgoing circuit breaker 121 corresponding to the power generation unit 20 that is not in use.

[0070] The first control module 710 is specifically located in the power generation monitoring center 70. The first control module 710 communicates with each power distribution device 10 and power generation unit 20 via wired or wireless means. Optionally, the first control module 710 communicates with each power distribution device 10 and power generation unit 20 via an Ethernet cable 720. Optionally, the power supply method of the auxiliary equipment 40 is the same as in Embodiment 2, and will not be described again. The activation status information of the power generation unit 20 can be obtained by monitoring the status of its output circuit breaker 210.

[0071] In this embodiment, the generator units 20 are pre-grouped according to their maximum power and the power consumption of the electric fracturing equipment 30, and a mapping relationship is established. Specifically, the controller pre-assigns groups A, B, ... N of the generator units 20 to the corresponding outgoing circuit breakers 121 of the power distribution equipment 10. Generally, the maximum output power of each generator unit 20 is different, and the number of electric fracturing equipment 30s corresponding to the power of each generator unit 20 is also different. The circuit breaker signals of each generator unit 20 can be arbitrarily grouped across the power distribution equipment 10 to the outgoing circuit breakers 121 of the power distribution equipment 10.

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

[0073] In this embodiment, if a power generation unit 20 malfunctions, the controller automatically disconnects the corresponding outgoing circuit breaker 121 according to the pre-set grouping settings to shed the load. This ensures that if one or more power generation units 20 malfunction, the load of the subsequently connected electric fracturing equipment 30 will not be transferred to other remaining fault-free power generation units 20, ensuring that well site operations can continue and preventing well blockage.

[0074] Example 4

[0075] like Figure 4 As shown, Example 4 is a further improvement upon Example 2. Specifically, the difference between Example 4 and Example 3 is as follows:

[0076] The power supply system for the fracturing well site includes a first control module 710 and a second control module 810. The second control module 810 communicates with each electrically driven fracturing device 30 and the first control module 710 via wired or wireless means. The second control module 810 monitors the power information and total power information of each electrically driven fracturing device 30 in real time and sends this information 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 circuit breakers 121 based on the total output power of multiple power generation units 20 during fracturing well site operations.

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

[0078] Similar to embodiments two and three, in this embodiment, the auxiliary device 40 can be connected to one of the outgoing circuit breakers 121 of any power distribution device 10. The power supply to the auxiliary device 40 will not be interrupted regardless of a fault in any generator set, and the auxiliary device 40 will always remain powered.

[0079] Each power distribution device 10 can be connected to each group of electric fracturing equipment 30 in an interval connection manner, that is, (1) the power distribution device 10 is connected to the group a electric fracturing equipment 30, (2) the power distribution device 10 is connected to the group b electric 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 circuit breakers 121 need to be disconnected, thereby ensuring that the load 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 used to: sequentially disconnect each outgoing circuit breaker 121 until the total output power is not less than the total power when the total output power of the multiple sets of power generation units 20 is less than the total power of the electric fracturing equipment 30. That is, the controller is pre-configured with the sorting relationship of each outgoing circuit breaker 121, so that each outgoing circuit breaker is automatically disconnected according to the sequence number from smallest to largest.

[0082] This ensures that if one or more power generation units 20 fail, the load of the subsequent electrically driven fracturing equipment 30 will not be transferred to other remaining fault-free power generation units 20, thus ensuring that well site operations can continue and preventing well blockage.

[0083] For example, refer to Figure 4 Assume that auxiliary equipment 40 is connected to CB1 of group (1) power distribution equipment 10, that is, connected to the first outgoing circuit breaker of group (1) power distribution equipment 10. Each power distribution equipment 10 has 10 outgoing circuit breakers 121, each electric fracturing equipment 30 has a power of 2MW, and the output power of group A power generation unit 20 is 30MW. When group A power generation unit 20 fails, the first control module 710 needs to disconnect 15 outgoing circuit breakers 121 according to calculation. Then the first control module 710 automatically disconnects CB2~10 of group (1) power distribution equipment 10 and disconnects CB1~6 of group (2) power 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 breakers 121 according to other algorithm rules.

[0085] For example, the first control module 710 sequentially selects and disconnects one outgoing circuit breaker 121 from each of the power distribution equipment 10. When all the power distribution equipment 10 disconnects one outgoing circuit breaker 121 but the total output power is still less than the total power, the system repeats the process of sequentially selecting and disconnecting one outgoing circuit breaker 121 from each of the power distribution equipment 10.

[0086] In this way, if one or more power generation units 20 fail, as many power distribution equipment 10s as possible can be put into use at the same time, so that each well 60 can have some electrically driven fracturing equipment 30 supplying the well 60 normally.

[0087] refer to Figure 5 One embodiment of this application proposes a method for power supply in a fracturing well site, comprising the following steps:

[0088] S100, connect multiple sets of power generation units 20 to the incoming line section 110 of multiple sets of power distribution equipment 10 respectively, and the outgoing line section 120 of each power distribution equipment 10 includes multiple outgoing switch cabinets, each with an outgoing circuit breaker 121.

[0089] S200, Multiple sets of electrically driven fracturing equipment 30 are electrically connected to the output terminals 120 of multiple sets of power distribution equipment 10 and supplied to multiple wells 60, wherein each set of electrically driven fracturing equipment 30 includes multiple electrically driven fracturing equipment 30, each electrically driven fracturing equipment 30 is connected to an output circuit breaker 121, and the multiple electrically driven fracturing equipment 30 in each set of electrically driven fracturing equipment 30 supplies to different wells 60.

[0090] refer to Figure 1 By grouping the power generation unit 20 and the electric fracturing equipment 30 into groups, and dividing the electric fracturing equipment 30 into two or more independent groups of equipment that operate independently, the power supply to the electric fracturing equipment 30 of each well 60 is not limited to one power generation unit 20. However, each power generation device supplies power independently without interfering with each other. If any power generation unit 20 fails, it will not affect other power generation units 20. Thus, 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 step of: S300, disconnecting the outgoing circuit breaker 121 of the corresponding power distribution equipment 10 according to the open state of the outgoing circuit breaker 210 of the power generation unit 20.

[0092] In this embodiment, when a power generation unit 20 malfunctions, the output 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 equipment 10. When the corresponding outgoing circuit breaker 121 of the power distribution equipment 10 is not connected to the auxiliary equipment 40, all outgoing circuit breakers 121 of the power distribution equipment 10 are disconnected. When one outgoing circuit breaker 121 of the corresponding power distribution equipment 10 is connected to the auxiliary equipment 40, the other outgoing circuit breakers 121 on the power distribution equipment 10 are disconnected.

[0093] refer to Figure 3 In some embodiments, the following steps are also included:

[0094] S400: Monitor and acquire information on power generation units 20 that are not in use among multiple groups of power generation units 20.

[0095] S500, disconnect the outgoing circuit breaker 121 corresponding to the unactivated power generation unit 20.

[0096] Specifically, in this embodiment, the first control module 710 of the monitoring center of the power generation unit 20 can obtain information about power generation units 20 that are not in use (i.e., information about power generation units 20 that have malfunctioned). Specifically, the tripping status of the output circuit breaker 210 of the power generation unit 20 can be used to determine whether a fault has occurred. Then, the first control module 710 disconnects the output circuit breaker 121 corresponding to the power generation unit 20 that has malfunctioned.

[0097] refer to Figure 4 In some embodiments, the following steps are also included:

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

[0099] S700. During fracturing well site operations, based on the total output power of the multiple sets of power generation units 20, determine and disconnect some outgoing circuit breakers 121.

[0100] Further, step S700 includes:

[0101] S710, when the total output power of the multiple sets of power generation units 20 is less than the total power of the electric fracturing equipment 30, the outgoing circuit breakers 121 are sequentially disconnected until the total output power is not less than the total power. Specifically, the first control module 710 sequentially disconnects the outgoing circuit breakers 121 until the total output power is not less than the total power.

[0102] Alternatively, step S700 includes:

[0103] S720, when the total output power of the multiple sets of power generation units 20 is less than the total power of the electric fracturing equipment 30, one outgoing circuit breaker 121 is selected and disconnected from each of the power distribution equipment 10 in sequence.

[0104] S730. When all power distribution equipment 10 disconnects one outgoing circuit breaker 121 but the total output power is still less than the total power, the process of repeatedly selecting and disconnecting one outgoing circuit breaker 121 from each power distribution equipment 10 in turn is repeated.

[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 and compares it with the total power sent from the second control module 810 to determine how many outgoing circuit breakers 121 need to be disconnected, thereby ensuring that the load power does not exceed the maximum output power of the remaining power generation units 20. This ensures that after one or more power generation units 20 fail, the load of the subsequent electrically driven fracturing equipment 30 will not be transferred to other remaining fault-free power generation units 20, ensuring that well site operations can continue and preventing well blockage.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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 this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A power supply system for fracturing well sites, characterized in that, include: Multiple sets of power distribution equipment, each power distribution equipment includes an incoming line section and an outgoing line section, the outgoing line section includes multiple outgoing switch cabinets, each with an outgoing line circuit breaker, and the incoming line sections of the multiple sets of power distribution equipment are connected in parallel via a busbar; Multiple sets of power generation units, wherein the multiple sets of power generation units are electrically connected to the incoming lines of the multiple sets of power distribution equipment; Multiple sets of electrically driven fracturing equipment are electrically connected to the outgoing lines of multiple sets of power distribution equipment. Each set of electrically driven fracturing equipment includes multiple electrically driven fracturing devices, and each electrically driven fracturing device is connected to one of the outgoing circuit breakers. The power supply system for the fracturing well site also includes a first control module and a second control module; The second control module is connected to each of the electric fracturing devices and the first control module. The second control module monitors the power information and total power information of each of the electric fracturing devices in real time and sends them to the first control module. The first control module is connected to each of the power generation units. The first control module is used to: determine and disconnect some outgoing circuit breakers based on the total output power of the multiple power generation units during fracturing well site operations; the first control module is used to: when the total output power of the multiple power generation units is less than the total power of the electric fracturing equipment, the first control module sequentially selects and disconnects one outgoing circuit breaker from each power distribution equipment; when all power distribution equipment disconnects one outgoing circuit breaker but the total output power is still less than the total power, the first control module repeatedly selects and disconnects one outgoing circuit breaker from each power distribution equipment.

2. The power supply system for fracturing well sites according to claim 1, characterized in that, Also includes: Auxiliary equipment; and Multiple auxiliary power supplies are connected to an automatic transfer switch, and the automatic transfer switch selectively supplies power to the auxiliary equipment.

3. The power supply system for fracturing well sites according to claim 1, characterized in that, The power supply system for the fracturing well site also includes auxiliary equipment, the input end of which is connected to one of the outgoing circuit breakers.

4. The power supply system for fracturing well sites according to claim 1, characterized in that, The power supply system for the fracturing well site also includes a first control module. The first control module is connected to each of the power generation units. The first control module is configured with a mapping relationship between multiple sets of the power generation units and all outgoing circuit breakers. The first control module is used to: monitor and obtain information on the power generation units that are not in use among the multiple sets of power generation units during the fracturing well site operation, and disconnect the outgoing circuit breaker corresponding to the power generation unit that is not in use.

5. The power supply system for fracturing well sites according to claim 1, characterized in that, The electric fracturing equipment includes an electric motor, 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.

6. A fracturing well site system, characterized in that, Multiple wells; In any one of claims 1-5, the fracturing well site system comprises multiple electrically driven fracturing devices in each group of electrically driven fracturing devices, which are divided into multiple subgroups for supplying different wells.

7. A method for power supply to a fracturing well site, characterized in that, The power supply system applied to the fracturing well site as described in claim 1 includes the following steps: Multiple sets of power generation units are connected to the incoming lines of multiple sets of power distribution equipment, and the outgoing lines of each power distribution equipment include multiple outgoing switch cabinets, each with an outgoing circuit breaker. Multiple sets of electrically driven fracturing equipment are electrically connected to the output terminals of multiple sets of power distribution equipment and supplied to multiple wells. Each set of electrically driven fracturing equipment includes multiple electrically driven fracturing devices, and each of the electrically driven fracturing devices is connected to an output circuit breaker. The multiple electrically driven fracturing devices in each set of electrically driven fracturing equipment supply different wells.

8. The power supply method for fracturing well sites according to claim 7, characterized in that, It also includes the following steps: The outgoing circuit breaker of the corresponding power distribution equipment is disconnected according to the open state of the outgoing circuit breaker of the power generation unit.

9. The power supply method for fracturing well sites according to claim 7, characterized in that, It also includes the following steps: Monitor and acquire information on unactivated power generation units in multiple groups of power generation units; Disconnect the outgoing circuit breaker corresponding to the inactive power generation unit.

10. The power supply method for fracturing well sites according to claim 7, characterized in that, It also includes the following steps: Obtain the power information and total power information of each of the electrically driven fracturing devices; During fracturing operations at the well site, some outgoing circuit breakers are determined and disconnected based on the total output power of the multiple sets of power generation units.

11. The power supply method for fracturing well sites according to claim 10, characterized in that, During fracturing well site operations, based on the total output power of the multiple power generation units, some outgoing circuit breakers are determined and disconnected, including: When the total output power of the multiple sets of power generation units is less than the total power of the electric fracturing equipment, the outgoing circuit breakers are disconnected in sequence until the total output power is not less than the total power. or, When the total output power of the multiple power generation units is less than the total power of the electric fracturing equipment, one outgoing circuit breaker is selected and disconnected from each power distribution equipment in turn; If all power distribution equipment disconnects one outgoing circuit breaker but the total output power is still less than the total power, then repeatedly select one outgoing circuit breaker from each power distribution equipment to disconnect in turn.

Images