Driving method, device and system and oil field equipment

Abstract

The invention relates to a driving method, device and system and oil field equipment, and the method comprises the steps: obtaining the current electric quantity of a storage battery under the condition that the current torque demand of a driving pump meets a hybrid driving condition, then determining a target driving strategy based on the current torque demand and the current electric quantity, and according to the obtained target driving strategy, determining the current electric quantity of the storage battery; and the driving pump is driven to act. The corresponding target driving strategy is determined and executed according to the torque requirement and the current electric quantity of the storage battery, and the flexibility of the driving mode of the driving pump is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of equipment control, and particularly to a driving method, device, system, and oilfield equipment. Background Art

[0002] With the development of oilfield construction technology, many oilfield equipment with different engineering capabilities have emerged, such as cementing equipment, sand mixing equipment, and fracturing equipment on the oilfield. These oilfield equipment all use a driving pump as the output terminal of the equipment.

[0003] However, traditional oilfield equipment often uses a single type of energy to supply power to the driving pump, lacking flexibility. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a driving method, device, system, and oilfield equipment that can improve the flexibility of the driving mode of the driving pump.

[0005] In a first aspect, this application provides a driving method applied to a driving system; the driving system includes an engine, a motor, a battery, and a driving pump; the driving pump is respectively connected to the engine and the motor, and the motor is connected to the battery; the method includes:

[0006] When the current torque demand of the driving pump meets the hybrid driving condition, obtain the current power of the battery;

[0007] Based on the current torque demand and the current power, determine the target driving strategy;

[0008] According to the target driving strategy, drive the driving pump to act;

[0009] Among them, the target driving strategy is used to indicate the working mode of the engine and / or the motor to match the current torque demand of the driving pump.

[0010] In one embodiment, the method further includes:

[0011] When the current torque demand does not meet the hybrid driving condition, then indicate the engine or the motor to enter the working state to drive the driving pump to act.

[0012] In one embodiment, when the current torque demand does not meet the hybrid driving condition, then indicating the engine or the motor to enter the working state includes:

[0013] If the current torque demand is greater than the first power demand threshold, and it is determined that the current torque demand does not meet the hybrid driving condition, then indicate the engine to transmit the output power to the driving pump through the transfer case;

[0014] Among them, the transfer case is connected to the engine through the first transmission device and to the driving pump through the second transmission device.

[0015] In one embodiment, when the current torque demand does not meet the hybrid drive condition, it is indicated that the engine or the motor enters the working state, including:

[0016] If the current torque demand is less than the second power demand threshold, and it is determined that the current torque demand does not meet the hybrid drive condition, then it is indicated that the battery outputs electric energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold;

[0017] Wherein, the motor control circuit includes a busbar cabinet, an inverter and a frequency converter; the frequency converter is electrically connected to the inverter, the motor and the generator respectively; the inverter is connected to the battery through the busbar cabinet; the generator is electrically connected to the inverter; the motor is connected to the drive pump through a third transmission device, and the generator is connected to the transfer case through a fourth transmission device.

[0018] In one embodiment, based on the current torque demand and the current battery level, a target drive strategy is determined, including:

[0019] When the current torque demand falls within the first hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, the target drive strategy is determined as the engine transmits a part of the output power to the drive pump through the transfer case via a second transmission device;

[0020] When the current torque demand falls within the second hybrid torque demand range and it is determined according to the current battery level that the battery is not in a power-fed state, the target drive strategy is determined as the engine transmits the output power to the drive pump through the first transmission device, the transfer case and the second transmission device, and the battery outputs electric energy to the motor through the motor control circuit so that the motor transmits the output power to the drive pump through the third transmission device;

[0021] Wherein, the upper limit value of the first hybrid torque demand range is less than the lower limit value of the second hybrid torque demand range.

[0022] In one embodiment, the method further includes:

[0023] When the current torque demand falls within the first hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, it is indicated that the engine transmits another part of the output power to the generator through the transfer case so that the generator charges the battery through the inverter and the busbar cabinet.

[0024] In one embodiment, based on the current torque demand and the current battery level, a target drive strategy is determined, including:

[0025] When the current torque demand falls within the third hybrid torque demand range and it is determined according to the current battery level that the battery is not in a power-fed state, the target driving strategy is determined as the engine transmitting the output power to the generator through the transfer case, and the battery outputting electrical energy to the motor through the motor control circuit to jointly drive the drive pump;

[0026] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, the target driving strategy is determined as the battery outputting electrical energy to the motor through the motor control circuit to drive the drive pump;

[0027] Wherein, the upper limit value of the fourth hybrid torque demand range is less than the lower limit value of the third hybrid torque demand range.

[0028] In one embodiment, the method further includes:

[0029] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, it is instructed that the engine transmits the output power to the generator through the first transmission device and the transfer case, so that the generator charges the battery through the inverter and the busbar cabinet.

[0030] In one embodiment, determining the target driving strategy based on the current torque demand and the current battery level includes:

[0031] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a severely power-fed state, the target driving strategy is determined as the engine transmitting the output power to the generator through the first transmission device and the transfer case, and a part of the generated power of the generator is processed by the frequency converter and then output to the motor to drive the drive pump.

[0032] In one embodiment, the method further includes:

[0033] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a severely power-fed state, another part of the generated power of the generator charges the battery through the inverter and the busbar cabinet.

[0034] In a second aspect, the present application provides a driving device, which is applied to a driving system; the driving system includes an engine, a motor, a battery, and a drive pump; the drive pump is respectively connected to the engine and the motor, and the motor is connected to the battery; the device includes:

[0035] A battery level information acquisition module, configured to acquire the current battery level when the current torque demand of the drive pump meets the hybrid driving condition;

[0036] A strategy determination module, configured to determine a target driving strategy based on the current torque demand and the current battery level;

[0037] A strategy execution module for driving a drive pump according to a target-driven strategy.

[0038] The target-driven strategy is used to indicate the working mode of the engine and / or the motor to match the current torque demand of the drive pump.

[0039] In a third aspect, the present application provides a drive system, which includes an engine, a motor, a battery, a drive pump, and a controller.

[0040] The drive pump is respectively connected to the engine and the motor; the motor is connected to the battery; the controller is respectively connected to the engine, the motor, the battery, and the drive pump.

[0041] The controller is configured to execute the steps of the drive method according to any one of the above method embodiments.

[0042] In one embodiment, the system further includes a transfer case, a first transmission device, a second transmission device, a third transmission device, a fourth transmission device, a generator, and a motor control circuit; the motor control circuit includes an inverter, a converter, and a busbar cabinet.

[0043] The transfer case is connected to the engine through the first transmission device and to the drive pump through the second transmission device; the inverter is electrically connected to the converter, the motor, and the generator respectively; the converter is connected to the battery through the busbar cabinet; the generator is electrically connected to the converter; the motor is connected to the drive pump through the third transmission device, and the generator is connected to the transfer case through the fourth transmission device.

[0044] In a fourth aspect, the present application provides an oilfield device, which includes the drive system in the above system embodiment.

[0045] In the above drive method, device, system, and oilfield device, when the current torque demand of the drive pump meets the hybrid drive condition, the current power of the battery is obtained, and then based on the current torque demand and the current power, a target-driven strategy is determined, and the drive pump is driven to act according to the target-driven strategy. By determining and executing the corresponding target-driven strategy according to the torque demand and the current power of the battery, the present application effectively improves the flexibility of the drive mode of the drive pump. Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 The application environment diagram of the driving method in one embodiment;

[0048] Figure 2 The flow schematic diagram of the driving method in one embodiment;

[0049] Figure 3 The flow schematic diagram of determining the target driving strategy in one embodiment;

[0050] Figure 4 The flow schematic diagram of determining the target driving strategy in another embodiment;

[0051] Figure 5 The structural block diagram of the driving device in one embodiment;

[0052] Figure 6 The structural block diagram of the driving system in one embodiment. Detailed implementation manners

[0053] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] With the development of oilfield construction technology, many oilfield equipment with different engineering capabilities have emerged, such as cementing equipment, sand mixing equipment and fracturing equipment in the oilfield. For example, the application of fracturing equipment in oilfield equipment is the main measure for increasing oil and gas production in oil and gas fields.

[0055] Limited by problems such as construction cost and environmental pollution, electric equipment has been gradually adopted to provide power for on-site oilfield construction at present, that is, electric drive fracturing construction operations. For example, for the above-mentioned fracturing equipment, the fracturing system of the fracturing equipment can be connected to the power grid and powered by the power grid; or corresponding power generation equipment can be installed on site to power the fracturing system through the power generation equipment.

[0056] At present, gas turbines are generally used to drive generator sets for power generation in the electric drive construction operations of oilfield equipment. However, there are still the following problems with this electric drive method:

[0057] ① Gas turbines usually need to be equipped with black start equipment (such as diesel engines, etc.) for starting the generator. If there are multiple generators, multiple black start equipment need to be equipped simultaneously, resulting in equipment redundancy.

[0058] ② In the power supply mode of gas turbine generator sets, there are limitations on the power generation power. For example, during high-temperature operations, the power generation capacity of gas turbines decreases, and there may be an overload risk for the power generation equipment.

[0059] ③ The electrical load of oilfield construction operations fluctuates greatly. If there is little need for electricity during the intermediate intermittent stage, the generator set needs to run idling, resulting in waste of fuel. Otherwise, it is necessary to frequently start and stop some or all of the generator sets according to the processes of oilfield construction operations, leading to high operating costs and easily reducing the service life of the generator sets.

[0060] ④ When using a gas turbine as a power source to drive oilfield equipment, due to changes in working conditions, there will be load fluctuations. The load fluctuations cause the operating state of the gas turbine not to always be in the area of economic operation, resulting in energy waste.

[0061] The driving method provided by the embodiments of the present application can be applied to, for example, Figure 1 the application environment shown. Among them, the driving system 10 includes an engine 104, a motor 106, a storage battery 108, and a driving pump 102; the driving pump 102 is respectively connected to the engine 104 and the motor 106, and the motor 106 is connected to the storage battery 108. It can be understood that the engine 104 and the driving pump 102, as well as the motor 106 and the driving pump 102, can be connected through a transmission device or a transmission system; the connection between the motor 106 and the storage battery 108 is an electrical connection relationship.

[0062] In an exemplary embodiment, as Figure 2 shown, a driving method is provided. Taking the driving system 10 in Figure 1 as an example for illustration, it includes the following steps 202 to step 206. Among them:

[0063] Step S202, when the current torque demand of the driving pump meets the hybrid driving condition, obtain the current power of the storage battery.

[0064] Among them, when the hybrid driving condition is met, it means that the driving system can currently operate using a hybrid power source.

[0065] Optionally, the hybrid driving condition can be to meet a demand interval for the torque demand; when the driving system 10 operates within this torque demand interval, it is determined that the hybrid driving condition is met, and the driving system 10 can be operated using a hybrid power source; when the driving system 10 operates outside this torque demand interval, the driving system 10 is operated using a single power source.

[0066] Optionally, the hybrid driving condition can also be to meet a power threshold interval for the current power of the storage battery 108; when the driving system 10 operates within this power threshold interval, it is determined that the hybrid driving condition is met, and the driving system 10 can be operated using a hybrid power source; when the driving system 10 operates outside this power threshold interval, the driving system 10 is operated using a single power source.

[0067] Optionally, the hybrid drive condition can also be to meet a preset hybrid torque demand range and a preset hybrid power threshold range; when the drive system 10 operates within this hybrid torque demand range and hybrid power threshold range, it is determined to meet the hybrid drive condition, and the drive system 10 is operated through the hybrid power source; when the drive system 10 operates outside this torque demand range, the drive system 10 is operated through a single power source.

[0068] It can be understood that the setting method of the above hybrid drive condition is not limited to the implementation methods already mentioned in the above embodiments, as long as the drive system 10 can operate through the hybrid power source when meeting the hybrid drive condition, and the embodiments of the present application do not specifically limit the hybrid drive condition.

[0069] In some examples, the drive system 10 can also include a battery 108 power monitor for monitoring the current power of the battery 108. Exemplarily, the method further includes: collecting the current power of the battery 108 through the battery 108 power monitor.

[0070] In some examples, the drive system 10 can also include a drive pump 102 torque monitor for monitoring the torque of the drive pump 102. Optionally, the drive pump 102 can include a piston pump, a centrifugal pump, etc.

[0071] Specifically, when the current torque demand of the drive pump 102 meets the hybrid drive condition, the current power of the battery 108 can be obtained through the battery 108 power monitor.

[0072] Step S204, determine the target drive strategy based on the current torque demand and the current power.

[0073] Among them, the target drive strategy is used to indicate the working modes of the engine and / or the motor to match the current torque demand of the drive pump.

[0074] Exemplarily, the current torque demand matches the current load condition of the drive pump 102. Optionally, the load demand of the drive pump 102 under the current working condition can be compared with the current output power of the system, and the current torque demand can be obtained according to the result of the comparison calculation.

[0075] Specifically, according to the current torque demand of the drive pump 102 and the current power of the battery 108, determine the target drive strategy that needs to be executed currently.

[0076] Step S204, drive the drive pump to act according to the target drive strategy.

[0077] Among them, when the target drive strategy is executed, it can indicate the engine and / or the motor to output power to meet the torque demand of the drive pump in the current system.

[0078] Specifically, after determining the target driving strategy of the current system, by executing the target driving strategy, the engine 104 and / or the motor 106 can be controlled to output power, so as to meet the torque requirement of driving the pump 102 of the current system.

[0079] In the above driving method, when the current torque requirement of the driving pump meets the hybrid driving condition, the current power of the storage battery is obtained, and then based on the current torque requirement and the current power, a target driving strategy is determined and executed, and according to the target driving strategy, the driving pump is driven to act. By determining the corresponding target driving strategy according to the torque requirement and the current power of the storage battery, the flexibility of the driving mode of the driving pump is effectively improved in this application.

[0080] In one embodiment, the method further includes:

[0081] When the current torque requirement does not meet the hybrid driving condition, the engine or the motor is instructed to enter the working state to drive the driving pump to act.

[0082] Wherein, when the hybrid driving condition is not met, it means that the driving system 10 can currently be operated by a single power source.

[0083] Optionally, the hybrid driving condition can be to meet a demand interval for the torque requirement; when the driving system 10 operates outside this torque requirement interval, it is determined that the hybrid driving condition is not met, and the driving system 10 can be operated by a single power source.

[0084] Optionally, the hybrid driving condition can also be to meet a power threshold interval for the current power of the storage battery 108; when the driving system 10 operates outside this power threshold interval, it is determined that the hybrid driving condition is not met, and the driving system 10 can be operated by a single power source.

[0085] Optionally, the hybrid driving condition can also be to meet a preset hybrid torque requirement interval and a preset hybrid power threshold interval; when the driving system 10 operates outside the state of this hybrid torque requirement interval and hybrid power threshold interval, it is determined that the hybrid driving condition is not met, and the driving system 10 can be operated by a single power source. It can be understood that the single power source in the above embodiments can be the engine 104 or the motor 106 in the driving system 10.

[0086] It can be understood that the setting method of the above hybrid driving condition is not limited to the implementation methods already mentioned in the above embodiments, as long as the driving system 10 can be operated by a single power source when the hybrid driving condition is not met. The embodiments of this application do not specifically limit the hybrid driving condition.

[0087] Specifically, when the current torque demand of the driving pump 102 does not meet the hybrid driving condition, the engine 104 or the motor 106 is instructed to enter the working state as a single power source to drive the driving pump 102 of the system 10 to perform actions.

[0088] In one embodiment, when the current torque demand does not meet the hybrid driving condition, instructing the engine or the motor to enter the working state includes:

[0089] If the current torque demand is greater than the first power demand threshold, it is determined that the current torque demand does not meet the hybrid driving condition, and the engine is instructed to transmit the output power to the driving pump through the transfer case;

[0090] Wherein, the transfer case is connected to the engine through the first transmission device and to the driving pump through the second transmission device.

[0091] Exemplarily, the first power demand threshold can be set in a state where the driving pump 102 of the driving system 10 requires a large torque, such as when the plunger pump of the fracturing equipment has a large load. When the current torque demand of the driving pump 102 is greater than the first power demand threshold, it indicates that the driving pump 102 currently has a large torque demand. At this time, the engine 104 can be used to stably output a large torque to the driving pump 102 through the transfer case and the transmission device.

[0092] Optionally, the engine 104 of the above driving system 10 can be driven by fuel or gas. It can be understood that the engine 104 can save more fuel when operating at a high speed.

[0093] Specifically, when the current torque demand is greater than the first power demand threshold, it can be determined that the current torque demand does not meet the hybrid driving condition, and the driving system 10 needs to output a large torque. At this time, the engine 104 can be instructed to transmit the output power to the driving pump 102 through the transfer case, so as to meet the current torque demand of the driving pump 102 and save fuel.

[0094] In order to make the purpose, technical solution and advantages of the present application clearer, the following further details the technical solution of the present application in combination with the Figure 3 shown driving system 10 and embodiments. It should be understood that the driving system shown here is only one possible implementation. Figure 3 shown driving system is only one possible implementation.

[0095] In one embodiment, when the current torque demand does not meet the hybrid driving condition, instructing the engine or the motor to enter the working state includes the following steps:

[0096] If the current torque demand is less than the second power demand threshold and it is determined that the current torque demand does not meet the hybrid drive condition, then it is indicated that the battery outputs electrical energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold.

[0097] Wherein, the motor control circuit includes a busbar cabinet 110, a converter 112 and an inverter 114; the inverter 114 is electrically connected to the converter 112, the motor 106 and the generator 116 respectively; the converter 112 is connected to the battery 108 through the busbar cabinet 110; the generator 116 is electrically connected to the converter 112; the motor 106 is connected to the drive pump 102 through a third transmission device 122, and the generator 116 is connected to the power take-off box 126 through a fourth transmission device 124.

[0098] It can be understood that when the battery 108 discharges, the busbar cabinet 110 can collect the discharge currents of multiple batteries 108 onto a main circuit; when the battery 108 charges, the busbar cabinet 110 can distribute the main circuit current to each battery 108.

[0099] Optionally, the converter 112 may include a rectifier and an inverter. It can be understood that when the battery 108 discharges, the direct current can be converted into alternating current through the above-mentioned inverter; when the battery 108 charges, the alternating current can be converted into direct current through the above-mentioned rectifier. In this way, the variable current processing requirements of the motor 106, the generator 116 and the battery 108 can be met.

[0100] It can be understood that the above-mentioned inverter 114 can be used to control the running speed of the motor 106 of the drive system. The above-mentioned inverter 114 can adjust the rotational speed, torque and output power of the motor 106 by changing the input voltage and current frequency, so that it can operate in the best state, realizing the function of energy saving and consumption reduction.

[0101] Exemplarily, the second power demand threshold can be set in a state where the drive pump 102 of the drive system only requires a small torque. When the current torque demand of the drive pump 102 is less than the first power demand threshold, it means that only a small torque needs to be output to the drive pump 102. At this time, it can be indicated that the battery 108 uses the stored electrical energy to drive the motor 106 to operate to meet the current torque demand of the drive pump 102.

[0102] Specifically, the electric energy output by the storage battery 108 of the drive system is converged by the busbar cabinet 110 and then subjected to current conversion processing by the current converter 112, and then transmitted to the frequency converter 114 of the control circuit of the motor 106. After being processed by the frequency converter 114, the output electric energy is transmitted to the motor 106 of the drive system. The motor 106 then converts the electric energy output by the storage battery 108 into mechanical energy, and transmits the output power to the drive pump 102 through the third transmission device 122, thereby realizing the operation of the drive pump 102. It can be understood that compared with meeting the torque requirement of the drive pump 102 by outputting torque through the engine 104, in this embodiment, the torque requirement of the drive pump 102 is completely met by the motor 106 of the drive system 10, which can realize faster and more sensitive adjustment of torque output, so as to quickly respond to and meet the torque requirement, and there will be no slipping and turning phenomenon.

[0103] In some possible implementations, when the drive pump 102 decelerates or stops, the remaining kinetic energy of the motor can be recovered to drive the generator 116 to charge the storage battery 108. By the above method, the energy utilization rate of the system is improved, making the drive system more energy-saving and more environmentally friendly.

[0104] In one embodiment, as Figure 4 shown, based on the current torque requirement and the current power level, a target drive strategy is determined, including the following steps S402 to step S404. Among them:

[0105] Step S402, when the current torque requirement falls within the first hybrid torque requirement range and it is determined according to the current power level that the storage battery is in a power-fed state, the target drive strategy is determined as the engine transmitting a part of the output power to the drive pump through the transfer case via the second transmission device.

[0106] Among them, when the current torque requirement falls within the first hybrid torque requirement range, it can indicate that the drive pump of the drive system has a medium-level torque requirement at this time.

[0107] Specifically, when the torque requirement of the drive pump 102 is medium and the storage battery 108 is in a power-fed state or a severely power-fed state at this time, the engine 104 of the drive system generates power and transmits the power to the transfer case 126 of the drive system through the transmission device. The transfer case 126 will transmit a part of the power output by the engine 104 to the generator 116 through the transmission device for power generation operation, and the other part of the power output by the engine 104 will be transmitted to the drive pump 102 to meet the torque requirement of the drive pump 102. In the above working mode, the drive system can meet the torque requirement for the current drive pump 102 to work through a part of the power of the engine 104.

[0108] Step S404, when the current torque demand falls within the second hybrid torque demand range and it is determined according to the current battery power that the battery is not in a power-fed state, the target drive strategy is determined as follows: the engine transmits the output power to the drive pump through the first transmission device, the transfer case, and the second transmission device, and the battery outputs electrical energy to the motor through the motor control circuit, so that the motor transmits the output power to the drive pump through the third transmission device.

[0109] Wherein, the upper limit value of the first hybrid torque demand range is less than the lower limit value of the second hybrid torque demand range.

[0110] It can be understood that when the current torque demand falls within the second hybrid torque demand range, it can indicate that the drive pump 102 of the drive system has a relatively large torque demand at this time.

[0111] Specifically, when the drive pump 102 of the drive system has a relatively large torque demand and the current battery 108 has sufficient power, the power received by the drive pump 102 at this time can come from two paths: "engine 104 → first transmission device 118 → transfer case 126 → second transmission device 120 → drive pump 102", and "battery 108 → busbar cabinet 110 → converter 112 → frequency converter 114 → motor 106 → third transmission device 122 → drive pump 102". In this way, a greater torque can be output to the drive pump 102 of the drive system to better meet the torque demand of the drive pump 102 under the current high-load condition.

[0112] In one embodiment, the method further includes:

[0113] When the current torque demand falls within the first hybrid torque demand range and it is determined according to the current battery power that the battery is in a power-fed state, it is indicated that the engine transmits another part of the output power to the generator through the transfer case, so that the generator charges the battery through the converter and the busbar cabinet.

[0114] Wherein, when the current torque demand falls within the first hybrid torque demand range, it can indicate that the drive pump 102 of the drive system has a medium torque demand at this time.

[0115] Specifically, when the torque demand of the driving pump 102 is medium and the battery 108 is in a power-fed state or a severely power-fed state at this time, the power generated by the engine 104 of the drive system can be transmitted to the transfer case 126 of the drive system through the transmission. The transfer case 126 will further transmit a part of the power output by the engine 104 to the generator 116 through the transmission for power generation operations. The generated power of the generator 116 can be transmitted to the battery 108 through the converter 112 and the busbar cabinet 110 of the system for power storage; another part of the power output by the engine 104 will be transmitted to the driving pump 102 to meet the torque demand of the driving pump 102. In the above working mode, the drive system 10 can not only meet the torque demand for the current operation of the driving pump 102, but also charge the battery 108 at the same time.

[0116] In one embodiment, as Figure 5 shown, based on the current torque demand and the current power, a target drive strategy is determined, including the following steps S502 to S504. Among them:

[0117] Step S502: When the current torque demand falls within the third hybrid torque demand range and it is determined according to the current power that the battery 108 is in a non-power-fed state, the target drive strategy is determined as the engine transmitting the output power to the generator through the transfer case, and the battery outputting electrical energy to the motor through the motor control circuit to jointly drive the driving pump to work.

[0118] Among them, when the current torque demand falls within the third hybrid torque demand range, it can indicate that the driving pump of the drive system has a medium degree of torque demand (power demand) at this time. Optionally, the third hybrid torque demand range can be set to the same torque demand range as the first hybrid torque demand range.

[0119] Specifically, the engine 104 of the drive system works to generate power, and transmits the power to the transfer case 126 through the transmission. The transfer case 126 transmits the power to the generator 116 through the transmission, so that the generator 116 works to generate electrical energy; if the power required by the driving pump 102 is medium and the battery 108 has sufficient power at this time, on the one hand, the generated power of the generator 116 is transmitted to the motor 106 after frequency conversion processing by the frequency converter 114; at the same time, the electrical energy stored in the battery 108 is transmitted to the motor 106 after being processed by the busbar cabinet 110, the converter 112, and the frequency converter 114. That is, the electrical energy received by the motor 106 at this time comes from the generator 116 and the battery 108. The motor 106 then converts the received electrical energy into mechanical energy and transmits the output power to the driving pump 102 through the transmission to meet the torque demand of the driving pump 102.

[0120] Step S504: When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a power-fed state based on the current battery level, the target driving strategy is determined as the battery outputs electrical energy to the motor through the motor control circuit to drive the drive pump.

[0121] Among them, the upper limit value of the fourth hybrid torque demand range is less than the lower limit value of the third hybrid torque demand range.

[0122] Exemplarily, when the current torque demand falls within the fourth hybrid torque demand range, it can indicate that the drive pump of the drive system has a relatively small torque demand at this time.

[0123] Specifically, when the power required by the drive pump 102 is low and the battery 108 of the drive system is currently in a power-fed state, the remaining power of the battery 108 can be used to drive the motor 106 to meet the current relatively small torque demand of the drive pump 102. It can be understood that using the output power of the motor 106 to meet the relatively small torque demand can adjust the torque output faster and respond more flexibly to changes in torque demand.

[0124] In one embodiment, the method further includes:

[0125] When the current torque demand falls within the fourth hybrid torque demand range and the battery is determined to be in a power-fed state based on the current battery level, it is indicated that the engine transmits the output power to the generator through the first transmission device and the transfer case, so that the generator charges the battery through the converter and the busbar cabinet.

[0126] Among them, when the current torque demand falls within the fourth hybrid torque demand range, it can indicate that the drive pump of the drive system has a relatively small torque demand at this time.

[0127] Specifically, when the power required by the drive pump 102 is low and the battery 108 of the drive system is currently in a power-fed state, the electrical energy generated by the generator 116 of the drive system is output to the battery 108 through the converter 112 and the busbar cabinet 110 for charging the battery 108. At this time, the electrical energy required by the motor 106 is provided by the battery 108. It can be understood that the electrical energy of the battery 108 consumed by the motor 106 at this time is less than the electrical energy for charging the battery 108 by the generator 116. In this way, it is possible to both meet the relatively small torque demand of the drive pump 102 and charge the battery 108, so that it is not necessary to allocate a separate charging time for the battery 108 of the drive system, improving the working efficiency of the drive system.

[0128] In one embodiment, determining the target driving strategy based on the current torque demand and the current battery level includes the following steps:

[0129] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a severely discharged state, the target drive strategy is determined as the engine transmitting the output power to the generator through the first transmission and the transfer case, and the generator outputting a part of the generated power to the motor after being processed by the frequency converter to drive the drive pump.

[0130] Among them, when the current torque demand falls within the fourth hybrid torque demand range, it can indicate that the drive pump of the drive system has a relatively small torque demand at this time.

[0131] Specifically, when the power required by the drive pump 102 is low and the battery 108 is in a severely discharged state, a part of the electrical energy generated by the generator 116 of the drive system is transmitted to the motor 106 after frequency conversion processing to drive the motor 106 to output power, so as to meet the relatively small torque demand of the drive pump 102. It can be understood that the electrical energy required by the motor 106 at this time is completely provided by the generator 116.

[0132] In one embodiment, the method further includes:

[0133] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a severely discharged state, the generator charges the battery with another part of the generated power through the inverter and the busbar cabinet.

[0134] Among them, when the current torque demand falls within the fourth hybrid torque demand range, it can indicate that the drive pump of the drive system has a relatively small torque demand at this time.

[0135] Specifically, when the power required by the drive pump 102 is low and the battery 108 is in a severely discharged state, a part of the electrical energy generated by the generator 116 of the drive system is transmitted to the motor 106 after frequency conversion processing to drive the motor 106 to output power, so as to meet the relatively small torque demand of the drive pump 102; another part of the electrical energy generated by the generator 116 is transmitted to the battery 108 through the inverter 112 and the busbar cabinet 110 for charging the battery 108. It can be understood that the electrical energy required by the motor 106 at this time is completely provided by the generator 116. Meanwhile, the generator 116 is also used to charge the severely discharged battery 108.

[0136] The hybrid drive mode of the present application has the characteristics of energy conservation and environmental protection, can improve the utilization rate of system energy (such as natural gas, diesel, etc.), has the function of peak shaving and valley filling, can enable the generator to avoid operating under low load conditions, and enable the engine to work under the most fuel-saving and most economical working conditions. Secondly, the drive system of the present application adapts to a wide range of power demands, can achieve economic operation in each demand interval, and has strong applicability. In addition, the present application can also meet the needs of customers for small-scale oilfield operations, can maximize the utilization rate of fuel, and reduce operating costs.

[0137] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown in the direction of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps or stages in other steps.

[0138] Based on the same inventive concept, the embodiments of the present application also provide a drive device for implementing the above-mentioned drive method. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the drive device provided below can refer to the limitations on the drive method in the above text, and will not be repeated here.

[0139] In an exemplary embodiment, as Figure 6 shown, a drive device 600 is provided, which is applied to a drive system; the drive system includes an engine, a motor, a storage battery, and a drive pump; the drive pump is respectively connected to the engine and the motor, and the motor is connected to the storage battery; the device 600 includes:

[0140] A power quantity information acquisition module 602, configured to acquire the current power quantity of the storage battery when the current torque demand of the drive pump meets the hybrid drive condition;

[0141] A strategy determination module 604, configured to determine a target drive strategy based on the current torque demand and the current power quantity;

[0142] A strategy execution module 606, configured to drive the drive pump to act according to the target drive strategy; wherein, the target drive strategy is used to indicate the working mode of the engine and / or the motor to match the current torque demand of the drive pump.

[0143] In one embodiment, the device 600 further includes:

[0144] A non-hybrid working module, configured to, when the current torque demand does not meet the hybrid driving condition, instruct the engine or the motor to enter the working state to drive the driving pump to operate.

[0145] In one embodiment, the non-hybrid working module is further configured to:

[0146] If the current torque demand is greater than the first power demand threshold and it is determined that the current torque demand does not meet the hybrid driving condition, instruct the engine to transmit the output power to the driving pump through the transfer case;

[0147] Wherein, the transfer case is connected to the engine through a first transmission device and to the driving pump through a second transmission device.

[0148] In one embodiment, the non-hybrid working module is further configured to:

[0149] If the current torque demand is less than the second power demand threshold and it is determined that the current torque demand does not meet the hybrid driving condition, instruct the battery to output electrical energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold;

[0150] Wherein, the motor control circuit includes a busbar cabinet, an inverter and a frequency converter; the frequency converter is electrically connected to the inverter, the motor and the generator respectively; the inverter is connected to the battery through the busbar cabinet; the generator is electrically connected to the inverter; the motor is connected to the driving pump through a third transmission device, and the generator is connected to the transfer case through a fourth transmission device.

[0151] In one embodiment, the policy determination module 604 is further configured to:

[0152] When the current torque demand falls within the first hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, determine the target driving policy as the engine transmitting a part of the output power to the driving pump through the transfer case and the second transmission device;

[0153] When the current torque demand falls within the second hybrid torque demand range and it is determined according to the current battery level that the battery is not in a power-fed state, determine the target driving policy as the engine transmitting the output power to the driving pump through the first transmission device, the transfer case and the second transmission device, and the battery outputting electrical energy to the motor through the motor control circuit so that the motor transmits the output power to the driving pump through the third transmission device;

[0154] Wherein, the upper limit value of the first hybrid torque demand range is less than the lower limit value of the second hybrid torque demand range.

[0155] In one embodiment, the device 600 further includes:

[0156] A first charging module, configured to, when the current torque demand falls within the first hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, instruct the engine to transmit another part of the output power to the generator through the transfer case, so that the generator charges the battery through the inverter and the busbar cabinet.

[0157] In one embodiment, the policy determination module 604 is further configured to:

[0158] When the current torque demand falls within the third hybrid torque demand range and it is determined according to the current battery level that the battery is not in a power-fed state, determine the target driving policy as the engine transmitting the output power to the generator through the transfer case, and the battery outputting electrical energy to the motor through the motor control circuit to jointly drive the drive pump to work;

[0159] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, determine the target driving policy as the battery outputting electrical energy to the motor through the motor control circuit to drive the drive pump to work;

[0160] Wherein, the upper limit value of the fourth hybrid torque demand range is less than the lower limit value of the third hybrid torque demand range.

[0161] In one embodiment, the device 600 further includes:

[0162] A second charging module, configured to, when the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a power-fed state, instruct the engine to transmit the output power to the generator through the first transmission device and the transfer case, so that the generator charges the battery through the inverter and the busbar cabinet.

[0163] In one embodiment, the policy determination module 604 is further configured to:

[0164] When the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a severely power-fed state, determine the target driving policy as the engine transmitting the output power to the generator through the first transmission device and the transfer case, and the generator processing a part of the generated power through the frequency converter and then outputting it to the motor to drive the drive pump to work.

[0165] In one embodiment, the device 600 further includes:

[0166] A third charging module, configured to, when the current torque demand falls within the fourth hybrid torque demand range and it is determined according to the current battery level that the battery is in a severely power-fed state, the generator charging the battery through the inverter and the busbar cabinet with another part of the generated power.

[0167] Each module in the above driving device can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0168] In an exemplary embodiment, as Figure 3 shown, the present application provides a driving system 10, which includes an engine 104, a motor 106, a storage battery 108, a driving pump 102, and a controller (not shown in the figure);

[0169] The driving pump 102 is respectively connected to the engine 104 and the motor 106; the motor 106 is connected to the storage battery 108; the controller is respectively connected to the engine 104, the motor 106, the storage battery 108, and the driving pump 102;

[0170] The controller is used to execute the steps of the driving method in any one of the above method embodiments.

[0171] In one of the embodiments, the system 10 further includes a transfer case 126, a first transmission device 118, a second transmission device 120, a third transmission device 122, a fourth transmission device 124, a generator 116, and a motor 106 control circuit; the motor 106 control circuit includes an inverter 114, a converter 112, and a busbar cabinet 110;

[0172] The transfer case 126 is connected to the engine 104 through the first transmission device 118 and to the driving pump 102 through the second transmission device 120; the inverter 114 is electrically connected to the converter 112, the motor 106, and the generator 116 respectively; the converter 112 is connected to the storage battery 108 through the busbar cabinet 110; the generator 116 is electrically connected to the converter 112; the motor 106 is connected to the driving pump 102 through the third transmission device 122, and the generator 116 is connected to the transfer case 126 through the fourth transmission device 124.

[0173] The present application provides an oilfield device, which includes the driving system 10 in the above system embodiment.

[0174] In some examples, the oilfield device may further include the following auxiliary systems:

[0175] Lubrication system: It can be used to provide lubricating oil for the working engine, generator, motor, transfer case, and transmission device.

[0176] Intake system: The engine needs air to burn fuel, and the intake system can be used to filter and silencer this part of the air and then supply it to the engine.

[0177] Exhaust system: It can be used to discharge the high-temperature smoke after engine combustion after silencing treatment.

[0178] Cabin: The entire drive system can be placed in the cabin, which can be used to block rain and sound insulation.

[0179] Ventilation system: can be used to ventilate and cool the cabin.

[0180] Fire protection system: It can be fire extinguishing modules distributed in various locations of the drive system; further, fire extinguishing medium can be replenished to various fire extinguishing modules through pipelines.

[0181] Optionally, the above-mentioned drive system can be arranged in a dual-vehicle configuration. For example, the battery or the engine can be arranged in the first transport vehicle, and the drive pump can be arranged in the second transport vehicle. It can be understood that the dual-vehicle configuration also has other possible implementation forms, as long as the drive system can achieve the function of meeting the torque requirement of the drive pump, and the present application does not specifically limit the dual-vehicle configuration.

[0182] Optionally, the first transport tool or the second transport tool may be a chassis vehicle, a ship or the like. The drive system is configured as a mobile system, which is convenient for rapid transfer and resumption of work in an oilfield working environment.

[0183] Those skilled in the art will understand that Figure 3 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the drive system to which the scheme of the present application is applied. The specific drive system may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0184] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0185] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0186] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0187] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in this application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., without limitation.

[0188] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered to be within the scope recorded in this application.

[0189] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A driving method, characterized in that: Applied to a drive system; the drive system comprises an engine, a motor, a battery and a drive pump; the drive pump is connected to the engine and the motor respectively, and the motor is connected to the battery; the method comprises: When the current torque demand of the driving pump meets the hybrid driving condition, obtaining the current power of the battery; Determining a target driving strategy based on the current torque demand and the current power; According to the target driving strategy, driving the driving pump to operate; The target driving strategy is used to indicate the working mode of the engine and / or the motor to match the current torque demand of the driving pump.

2. The method according to claim 1, characterized in that The method further comprises: When the current torque demand does not meet the hybrid driving condition, the engine or the motor is instructed to enter a working state to drive the driving pump to operate.

3. The method according to claim 2, characterized in that When the current torque demand does not meet the hybrid driving condition, instructing the engine or the motor to enter a working state, including: If the current torque demand is greater than a first power demand threshold, it is determined that the current torque demand does not meet the hybrid driving condition, and the engine is instructed to transmit the output power to the driving pump through the transfer case; Wherein, the transfer case is connected to the engine via a first transmission device, and is connected to the drive pump via a second transmission device.

4. The method according to claim 3, characterized in that When the current torque demand does not meet the hybrid driving condition, instructing the engine or the motor to enter a working state includes: If the current torque demand is less than a second power demand threshold, it is determined that the current torque demand does not meet the hybrid driving condition, and the battery is instructed to output electric energy to the motor through the motor control circuit; the second power demand threshold is less than the first power demand threshold; Among them, the motor control circuit includes a junction box, a converter and a frequency converter; the frequency converter is electrically connected to the converter, the motor and the generator respectively; the converter is connected to the battery through the junction box; the generator is electrically connected to the converter; the motor is connected to the drive pump through a third transmission device, and the generator is connected to the transfer case through a fourth transmission device.

5. The method according to claim 4, characterized in that The determining of a target driving strategy based on the current torque demand and the current power includes: When the current torque demand falls within the first hybrid torque demand interval and it is determined according to the current power that the battery is in a feeding state, the target driving strategy is determined as the engine transmitting a portion of the output power through the transfer case to the driving pump through the second transmission device; When the current torque demand falls within the second hybrid torque demand interval, and it is determined according to the current power that the battery is in a non-powered state, the target driving strategy is determined as the engine transmits the output power to the driving pump through the first transmission device, the transfer case and the second transmission device, and the battery outputs electrical energy to the motor through the motor control circuit, so that the motor transmits the output power to the driving pump through the third transmission device; The upper limit of the first hybrid torque demand range is smaller than the lower limit of the second hybrid torque demand range.

6. The method according to claim 5, characterized in that The method further comprises: When the current torque demand falls into the first hybrid torque demand interval and the battery is determined to be in a feeding state based on the current power level, the engine is instructed to transmit another part of the output power to the generator through the transfer case, so that the generator charges the battery through the inverter and the combiner cabinet.

7. The method according to claim 4, characterized in that The determining of a target driving strategy based on the current torque demand and the current power includes: When the current torque demand falls within a third hybrid torque demand interval and it is determined according to the current power that the battery is in a non-powered state, the target driving strategy is determined as the engine transmits output power to the generator through the transfer case and the battery outputs electrical energy to the motor through the motor control circuit, so as to jointly drive the driving pump to work; When the current torque demand falls within a fourth hybrid torque demand interval and it is determined that the battery is in a feeding state according to the current power, a target driving strategy is determined as the battery outputting electrical energy to the motor through the motor control circuit to drive the driving pump to work; The upper limit value of the fourth hybrid torque demand range is smaller than the lower limit value of the third hybrid torque demand range.

8. The method according to claim 7, characterized in that The method further comprises: When the current torque demand falls into the fourth hybrid torque demand interval and the battery is determined to be in a feeding state based on the current power, the engine is instructed to transmit the output power to the generator through the first transmission device and the transfer case, so that the generator charges the battery through the inverter and the combiner cabinet.

9. The method according to claim 7, characterized in that: The determining of a target driving strategy based on the current torque demand and the current power includes: When the current torque demand falls into the fourth hybrid torque demand interval and the battery is determined to be in a severe power feeding state based on the current power level, the target driving strategy is determined as the engine transmits the output power to the generator through the first transmission device and the transfer case, and the generator outputs a portion of the power generated after being processed by the inverter to the motor, so as to drive the drive pump to work.

10. The method according to claim 9, characterized in that The method further comprises: When the current torque demand falls into the fourth hybrid torque demand interval and it is determined that the battery is in a severe power feeding state according to the current power quantity, the generator charges the battery with another part of the power generated through the converter and the combiner cabinet.

11. A driving device, characterized in that: Applicable to a drive system; the drive system comprises an engine, a motor, a battery and a drive pump; the drive pump is connected to the engine and the motor respectively, and the motor is connected to the battery; the device comprises: A power information acquisition module, used for acquiring the current power of the battery when the current torque demand of the driving pump meets the hybrid driving condition; A strategy determination module, configured to determine a target driving strategy based on the current torque demand and the current power; A strategy execution module, used for driving the driving pump to act according to the target driving strategy; The target driving strategy is used to indicate the working mode of the engine and / or the motor to match the current torque demand of the driving pump.

12. A drive system, characterized in that: The drive system includes an engine, a motor, a battery, a drive pump and a controller; The driving pump is connected to the engine and the motor respectively; the motor is connected to the battery; the controller is connected to the engine, the motor, the battery and the driving pump respectively; The controller is used to execute the steps of the driving method according to any one of claims 1 to 8.

13. The system according to claim 11, characterized in that: The system further comprises a transfer case, a first transmission device, a second transmission device, a third transmission device, a fourth transmission device, a generator and a motor control circuit; the motor control circuit comprises a frequency converter, a current converter and a combiner cabinet; The transfer case is connected to the engine through the first transmission device, and is connected to the drive pump through the second transmission device; the frequency converter is electrically connected to the converter, the motor and the generator respectively; the converter is connected to the battery through the combiner cabinet; the generator is electrically connected to the converter; the motor is connected to the drive pump through the third transmission device, and the generator is connected to the transfer case through the fourth transmission device.

14. An oilfield equipment, characterized in that: Comprising a drive system as claimed in claim 12 or 13.

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