Power dynamic balance multi-source cooperative control device and control method of oil field drilling rig system

Abstract

The application provides a power dynamic balance multi-source cooperative control device and control method of an oilfield drilling rig system, relates to the technical field of multi-source cooperative control, and comprises: a detection unit that detects data of the oilfield drilling rig system in real time; a control unit that determines real-time active power based on the real-time detection data, generates a compensation instruction signal if the real-time active power is greater than a power grid power supply threshold, and otherwise charges a controllable power for an energy storage unit from the power grid while the power grid supplies power to the load; an energy balance unit that compensates for a capacity gap of the power grid through cooperative power supply of the energy storage unit and the generator; and a conversion control unit that regulates generator power, controls smooth and impact-free starting of the generator, and finally outputs stable power. The application performs multi-source linkage on grid power, generators, energy storage and the like, realizes integrated regulation and control, maximizes the use of grid power resources, reduces the proportion of oil and gas resources, fully utilizes new energy and the like to reduce the cost of electricity price, and realizes stable operation and energy efficiency optimization of the oilfield electric drilling rig.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multi-source cooperative control, in particular to a power dynamic balance multi-source cooperative control device and control method of an oilfield drilling rig system. BACKGROUND

[0002] Under the background of global green low-carbon transformation, the oil and gas industry, as a high energy consumption industry, is facing great emission reduction pressure. Due to the large power, load impact, and operation mobility of oilfield drilling rigs and fracturing equipment, the oilfield power grid structure cannot support the normal use of equipment in the oilfield drilling rig system. A large number of diesel generators are used for power supply, resulting in consumption of fossil energy, emission of pollutants such as carbon dioxide, and a series of problems such as high operation cost and maintenance cost.

[0003] The oilfield drilling rig equipment is mainly electric drilling rigs, and its power supply methods mainly include generators and power grids. Two power supplies use interlocking methods, and the power supply method can only be selected from two options. When the power grid is weak and cannot meet the use demand, diesel power supply is used. In the traditional oilfield drilling rig system, due to the relatively weak power grid, power supply mainly depends on diesel generators. This single energy mode not only has large fuel consumption and high operation cost, but also has serious environmental pollution.

[0004] A multi-source cooperative power supply scheme emerges as the times require. For example, the "multi-source oil drilling rig electric control system" disclosed in patent No. CN202410454251.0 uses PLC sequential control to realize grid / generator switching, but the switching delay is greater than or equal to 500 ms, which does not meet the requirement of API Spec 16D standard that the power interruption time of drilling equipment is less than or equal to 30 ms, which will cause power interruption of electrical equipment. Even if a fast switching scheme such as the existing static switching switch is used, the switching time is generally 10 ms to 20 ms, and the phase, amplitude, and other parameters of the dual power sources need to be controlled, which is complex and has low reliability.

[0005] Therefore, the existing oilfield drilling rig system still has the problem that the generator and the power grid cannot be used in parallel. SUMMARY

[0006] In order to solve the above problems, the present application provides a power dynamic balance multi-source cooperative control device and control method of an oilfield drilling rig system, which realizes integrated regulation and control by multi-source linkage of grid power, generators, energy storage, etc., maximizes the use of grid power resources, reduces the proportion of oil and gas resources, fully utilizes new energy to reduce electricity price cost, and realizes stable operation and energy efficiency optimization of the oilfield electric drilling rig.

[0007] According to some embodiments, the present application adopts the following technical scheme:

[0008] The power dynamic balance multi-source cooperative control device of the oilfield drilling rig system, the oilfield drilling rig system comprising a load, a power grid and a generator, the device comprising a detection unit, an energy balance unit, a conversion control unit and a control unit:

[0009] The detection unit is configured to detect the system voltage of the oilfield drilling rig system and the currents on the load side, the device side and the power grid side in real time.

[0010] The control unit is configured to determine the real-time active power of the oilfield drilling rig system based on the real-time detection data of the detection unit, generate a compensation instruction signal based on the capacity gap and send the compensation instruction signal to the energy balance unit if the real-time active power is greater than a preset power grid power supply threshold, or use the power grid to supply power to the load while controllably charging the energy storage unit inside the energy balance unit with power from the power grid if the real-time active power is not greater than the preset power grid power supply threshold.

[0011] The energy balance unit is configured to compensate for the capacity gap of the power grid by the cooperative power supply of the energy storage unit and the generator according to the compensation instruction signal, and the energy provided by the energy storage unit linearly exits and the generator linearly intervenes in the cooperative power supply process.

[0012] The conversion control unit is configured to regulate the power of the generator, control the generator to start smoothly without impact and finally output stable power in the process of the linear intervention of the generator.

[0013] According to some embodiments, the present application adopts the following technical solutions:

[0014] The control method of the power dynamic balance multi-source cooperative control device of the oilfield drilling rig system comprises the following steps:

[0015] Real-time detection of the system voltage of the oilfield drilling rig system and the currents on the load side, the device side and the power grid side.

[0016] Determination of the real-time active power of the oilfield drilling rig system based on the real-time detection data of the detection unit, generation of a compensation instruction signal based on the capacity gap and sending of the compensation instruction signal to the energy balance unit if the real-time active power is greater than a preset power grid power supply threshold, or controllable charging of the energy storage unit inside the energy balance unit with power from the power grid while using the power grid to supply power to the load if the real-time active power is not greater than the preset power grid power supply threshold.

[0017] Compensation for the capacity gap of the power grid by the cooperative power supply of the energy storage unit and the generator according to the compensation instruction signal, and linear exit of the energy provided by the energy storage unit and linear intervention of the generator in the cooperative power supply process.

[0018] In the process of the linear intervention of the generator, the power of the generator is regulated, the generator is controlled to start smoothly without impact and finally stable power is output.

[0019] According to some embodiments, the present application adopts the following technical solutions:

[0020] A computer program product includes a computer program that, when executed by a processor, implements a power dynamic balance multi-source collaborative control device for the oilfield drilling rig system.

[0021] According to some embodiments, the present invention adopts the following technical solution:

[0022] A non-transitory computer-readable storage medium is provided for storing computer instructions, which, when executed by a processor, enable a power dynamic balance multi-source collaborative control device for an oilfield drilling rig system.

[0023] According to some embodiments, the present invention adopts the following technical solution:

[0024] An electronic device includes a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to implement the power dynamic balance multi-source collaborative control device of the oilfield drilling rig system.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1) This invention provides a multi-source collaborative control device and control method for dynamic power balance of oilfield drilling rig system, which performs deep linkage regulation of grid power, generator and energy storage, and solves the problem of generator and grid not being able to be used in parallel through electrical decoupling.

[0027] 2) Through energy flow monitoring and analysis technology and multi-scale energy flow optimal coordination strategy, the contradiction between high transient power demand and stable continuous energy supply in impact load scenarios is specifically addressed, so as to maximize the use of grid resources, balance the stable output of generator power, and help achieve optimized allocation and efficient utilization of electrical energy.

[0028] 3) By adopting a power distribution control algorithm during energy conversion, the generator starts smoothly without impact, and the output power is smooth without large fluctuations, thereby improving the energy conversion efficiency. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a power supply connection diagram for the oilfield drilling rig system in Example 1;

[0031] Figure 2 This is a structural diagram of the device in Example 1;

[0032] Figure 3 This is a diagram of the converter system in Example 1;

[0033] Figure 4 This is a control display and communication diagram for the power dynamic balance multi-source collaborative control device in Example 2;

[0034] Figure 5 This is the execution priority logic diagram of the power dynamic balancing multi-source collaborative control device in Example 2;

[0035] Figure 6 This is the algorithm control logic diagram of the power dynamic balance multi-source collaborative control device in Example 2;

[0036] Figure 7 This is a diagram showing the power distribution effect during energy conversion of the power dynamic balance multi-source collaborative control device in Example 2. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] Example 1

[0041] One embodiment of the present invention provides a power dynamic balance multi-source collaborative control device for an oilfield drilling rig system. The oilfield drilling rig system includes a load, a power grid, and a generator. The device includes a detection unit, an energy balance unit, a conversion control unit, and a control unit.

[0042] The detection unit is used to detect the system voltage of the oilfield drilling rig system and the current on the load side, equipment side and power grid side in real time;

[0043] The control unit is used to determine the real-time active power of the oilfield drilling rig system based on the real-time detection data of the detection unit. If the real-time active power is greater than the preset power grid supply threshold, a compensation command signal is generated based on the capacity gap and sent to the energy balance unit. Otherwise, while the power grid supplies power to the load, the power grid charges the energy storage unit inside the energy balance unit with controllable power.

[0044] The energy balancing unit is used to compensate for the capacity gap in the power grid by coordinating the power supply of the energy storage unit and the generator according to the compensation command signal. During the coordinating power supply process, the energy provided by the energy storage unit is linearly withdrawn, and the generator is linearly engaged.

[0045] The conversion control unit is used to regulate the generator power during the linear engagement process of the generator, control the generator to start smoothly without shock, and ultimately output stable power.

[0046] As one embodiment, the power dynamic balance multi-source collaborative control device for the oilfield drilling rig system of the present invention integrates grid power, generators, energy storage, etc., to achieve unified control, maximize the utilization of grid power resources, reduce the proportion of oil and gas resources, and make full use of new energy sources to reduce electricity costs, thereby achieving stable operation and energy efficiency optimization of the oilfield electric drilling rig. The specific implementation process is as follows:

[0047] like Figure 1 As shown, the oilfield drilling rig system consists of loads, a dual-power interlocked power grid, and a generator. The loads include mud pumps, winches, and top drives. The dual-power interlock means the oilfield drilling rig system can be powered by either the power grid or the generator, with the two power supplies electrically interlocked via a circuit breaker. Power cannot be supplied to the drilling rig equipment simultaneously via parallel AC connection of the generator and the power grid. A power consumption assessment is conducted before drilling operations, and the power supply method is selected based on the assessment results. When the power grid capacity meets the power requirements of the drilling operation cycle, the power grid supply method is used; when the power grid capacity cannot meet the power requirements of the drilling operation cycle, the generator supply method is used.

[0048] like Figure 2 As shown, the power dynamic balance multi-source collaborative control device includes a detection unit, a control unit, an energy balance unit, a conversion control unit, and a human-machine interaction unit.

[0049] Under the premise of dual power supply interlock between the power grid and the generator, the energy balance unit of the device is connected in parallel to the AC600V power grid system through the first circuit breaker QF1, and the conversion control unit is connected to the generator system through the second circuit breaker QF2. The energy balance unit and the conversion control unit are interconnected by DC through a DC conversion switch.

[0050] The detection unit performs real-time monitoring of the load side, device side, and grid side. Based on the detected load current and system voltage, the control unit calculates power fluctuations and, according to a pre-set grid power supply threshold and load capacity gap, provides power capacity to the load. The control unit controls the generator's power supply capacity, and by adjusting the power matching between the energy storage unit and the generator, stable generator output is achieved, generator fluctuations are reduced, the generator operates at a higher efficiency, and the generator's fuel-to-electricity ratio (g / kWh) is lowered. The following is a description of each unit:

[0051] 1. Detection Unit

[0052] The detection unit DS includes three sets of external AC detection CT1~CT3, a system voltage detection APT, one DC voltage detection DPT (supercapacitor / energy storage battery), and one DC current detection DCT (charge / discharge).

[0053] (1) The real-time operating current of the load is accurately detected by the current transformer CT1 on the load side. By capturing the current change value in real time, the collected current value and the system voltage value are filtered, amplified and converted to ensure the accuracy and stability of the data, and then transmitted to the control unit MC.

[0054] (2) The current compensated by the device in real time (i.e. the current compensated to the load by the power dynamic balance multi-source co-control device) is detected by the current transformer CT2 on the device side. The current value collected is also processed by the signal and fed back to the control unit MC.

[0055] (3) The current of the power grid is detected by the current transformer CT3 on the power grid side. The current value collected is also processed by the signal and fed back to the control unit MC for comparison with the set active power threshold. The control unit MC performs real-time analysis and parameter adjustment on the received data to realize the closed-loop precise adjustment of the system in order to optimize the performance and efficiency of the device.

[0056] (4) System voltage detection APT: Based on the three-phase voltage of the voltage acquisition system, the high voltage 600V is converted into a low voltage signal level through the voltage detection circuit and then processed as the system voltage.

[0057] (5) DC voltage detection DPT detects the DC bus voltage. The high voltage DC voltage is converted into a low voltage signal level through transformer isolation and processed by the detection circuit, and then used as the DC voltage.

[0058] (6) The DC current is detected by Hall current DCT, and the collected current value and DC voltage value are processed and transmitted to the control unit MC for regulating the generator power and managing the energy storage unit.

[0059] 2. Control Unit

[0060] The system receives data signals transmitted from the detection unit (i.e., the three-phase current signal transmitted by CT1 and the voltage signal transmitted by APT), calculates the real-time active power, reactive power, and harmonic power, and makes decisions based on a preset algorithm to control the actions of each actuator (i.e., the energy balance unit and the conversion control unit). It employs instantaneous power compensation technology to achieve precise compensation for load power fluctuations, improve response speed, and solve the problem of rapid tracking of instantaneous power fluctuations.

[0061] By controlling the energy balance unit to rapidly adjust the system's power, fast and controllable energy interaction is achieved. The control algorithm, which combines active power balance and power quality management, enables active power interaction while comprehensively managing power quality issues such as reactive power, harmonics, and three-phase imbalance. This addresses the impact of numerous frequency converters and impact devices in drilling systems on the power grid's power quality and improves the safety of electricity use.

[0062] When the grid power supply capacity is insufficient, the generator power is regulated by the control conversion control unit. The power distribution control algorithm during energy conversion is adopted, and the multi-scale energy conversion control strategy is used to achieve seamless switching between different conversion devices, control the diesel generator to start smoothly without impact, and ensure smooth output power without large fluctuations, thereby improving the power conversion efficiency.

[0063] Specifically, by collecting key parameters such as the remaining power of the energy block, output voltage and current, diesel generator speed, and oil pressure in real time, and combining them with historical operating data and equipment models, the power demand and mechanical stress during the diesel generator startup process can be accurately predicted. Startup energy is provided to the diesel generator in a slow, incremental manner to avoid sudden high-power surges. Integrated control is achieved, linking the power grid, diesel generator, and energy storage systems to realize intelligent interconnection, maximizing grid power utilization, balancing stable diesel generator power output, and achieving the optimal economic operating mode.

[0064] 3. Energy Balance Unit

[0065] like Figure 3 As shown, the energy balance unit consists of a bidirectional converter and an energy storage unit. The AC side is connected in parallel with the power grid system through the first circuit breaker QF1. The circuit breaker has a fast response capability to ensure the safe and stable operation of the system. After passing through reactor L1-1, the circuit breakers QF11-1 to QF16-1 and AC contactors KM11-1 to KM16-1 are connected to the AC / DC converter. The converter is composed of high-power IGBT power electronic devices with a 1700V 600A three-level architecture. These devices are characterized by high efficiency and low loss. They are connected in parallel with multiple groups in a 5+1 redundancy configuration. Each group has a rated power of 400kVA, achieving a rated power of 2000kVA and a redundancy of 400kVA, ensuring that the other groups can still operate normally when any group of devices fails.

[0066] Each converter in the energy balance unit has a control unit. It receives commands from the control unit via fiber optic communication to achieve rapid bidirectional energy regulation, namely the charging and discharging of the energy storage unit. The DC side of the converter outputs through the built-in fuse and is then connected in parallel with the positive and negative buses to the energy storage unit. The fuse melts quickly in case of overload or short circuit, protecting the entire circuit from damage.

[0067] The energy storage unit uses supercapacitors as energy storage elements. Supercapacitors have advantages such as high power density, long lifespan, and fast charging and discharging. A multi-cluster parallel structure is employed to further improve the speed and efficiency of energy conversion and absorption. Simultaneously, the energy storage system can be connected to the bus side for long-term energy support or for peak shaving and valley filling, minimizing electricity costs. The winch's DC side is connected, and the potential energy from winch braking is recovered through the internal energy storage unit. When the energy storage unit cannot absorb the energy, it is fed back to the AC power distribution system through the converter of the control device.

[0068] 4. Conversion control unit

[0069] Composed of unidirectional converters, which also employ high-power IGBT power electronic devices and are of the same specifications as the converters in the energy balance unit, multiple sets are connected in parallel with N+1 redundancy to ensure that other sets can still operate normally if any set of devices fails. Each converter in the conversion control unit has a control unit that receives commands from the control system unit via fiber optic communication to achieve rapid unidirectional energy regulation.

[0070] The AC side is connected to the generator through the second circuit breaker QF2, and the DC side is connected in parallel with the energy balance unit through a fuse. It receives the adjustment command from the control unit, converts the AC power of the generator into DC power, performs unidirectional power adjustment, and avoids the generator being subjected to reverse power surges.

[0071] Figure 4 To control and display the communication diagram, the power dynamic balance multi-source collaborative control device adopts a master-slave control mode. The control unit communicates with the converter via a fiber optic extension board. Control commands are transmitted quickly and with strong anti-interference capabilities through fiber optic transmission between the control unit, the fiber optic extension board, and the converter. The control unit communicates bidirectionally with the human-machine interface unit via RS485. The grid power supply threshold is set through the human-machine interface unit and sent to the master controller. The master controller then uses the set threshold to implement optimal energy flow coordination strategies for power dynamic balance. Communication with the energy storage unit is achieved via CAN / RS485, collecting parameters such as voltage, temperature, and charge of the supercapacitor. An RS485 / GPRS interface is provided for backend or remote monitoring.

[0072] As one implementation method, a remote monitoring system is added. Through communication with the control unit, the system monitors the real-time operating status of each unit, predicts potential faults through data analysis, and issues timely warnings to ensure stable system operation. Simultaneously, the monitoring system has remote control capabilities, wirelessly interconnecting with local devices via a 5G network platform to remotely monitor real-time data on device operation and control data commands, facilitating overall management. It also features remote start / stop functions, allowing for remote power cut-off in emergencies to prevent escalation of accidents.

[0073] Example 2

[0074] One embodiment of the present invention provides a control method for a power dynamic balance multi-source collaborative control device for an oilfield drilling rig system, comprising:

[0075] Real-time monitoring of system voltage, load side, equipment side, and grid side current of oilfield drilling rig system;

[0076] Based on the real-time detection data of the detection unit, the real-time active power of the oilfield drilling rig system is determined. If the real-time active power is greater than the preset power grid supply threshold, a compensation command signal is generated based on the capacity gap. Otherwise, while the power grid supplies power to the load, the power grid also charges the energy storage unit inside the energy balance unit with controllable power.

[0077] According to the compensation command signal, the capacity gap of the power grid is compensated by the coordinated power supply of energy storage units and generators. During the coordinated power supply process, the energy provided by the energy storage units is linearly withdrawn, and the generators are linearly engaged.

[0078] During the linear intervention process of the generator, the generator power is adjusted to ensure a smooth and shock-free generator start-up, ultimately resulting in a stable power output.

[0079] Furthermore, the coordinated power supply of the energy storage unit and the generator specifically includes:

[0080] When the load fluctuation power exceeds the grid power supply threshold, the internal energy storage unit is controlled to provide short-term energy support to the load.

[0081] When the load power demand exceeds the maximum energy that the energy storage unit can provide, the generator power is controlled according to the capacity gap, and the generator supplies power to the load, thereby controlling the power demand of the power grid and stabilizing the AC voltage of the system.

[0082] Furthermore, the linear engagement of the generator employs a power distribution control algorithm during energy conversion, specifically:

[0083] By collecting the remaining power, output voltage and current of the energy storage unit, and the power generation parameters of the generator in real time, and combining historical operation data and the equipment model of the generator, accurately estimate the power demand and mechanical stress state during the generator startup process, and provide startup energy for the generator in a slowly increasing manner to avoid instantaneous high-power impacts.

[0084] Specifically, the control method is to design an optimal coordinated control strategy for multi-scale energy flow according to the power supply and consumption characteristics of the oilfield drilling rig system, interconnect multiple new power systems, suppress system voltage and frequency fluctuations, and improve the stability of the new power system, as Figure 5 shown, specifically as follows:

[0085] According to the maximum power supply capacity S that the power grid can provide for each operation, the device sets the power grid power supply threshold S through the man-machine interaction unit. According to the target requirements of system operation, the set active power threshold is corrected for active power P1 according to 98% of the power grid power supply threshold S; through the current and voltage detected in real time on the load side, the apparent power S2, active power P2, reactive power Q21 and harmonic power Q22 of the load are calculated by the control unit; compare the calculated active power P2 with the corrected active power P1;

[0086] (1) On the premise that the power grid threshold P1 capacity is satisfied, that is, P2 < P, preferentially use the power grid to supply power to the load, and at the same time, the power grid charges the energy storage unit with controllable power to ensure within the power grid power supply threshold P1.

[0087] (2) When the load fluctuation power P2 exceeds the power grid power supply threshold P1, that is, P2 >= P1, control the internal energy storage unit to provide short-term energy support for the load;

[0088] (3) When the load power demand exceeds the maximum energy that the energy storage unit can provide, control the generator power according to the capacity gap, and the generator compensates the capacity gap to control the power demand of the power grid within the threshold P1, so as to stabilize the AC voltage of the system.

[0089] (4) When the load power returns to the threshold P1, the power grid controllably compensates energy for the energy storage unit. When supplementing energy, control the magnitude of the supplementary current to make the power within the threshold P1 range.

[0090] A control algorithm combining active power balance and power quality management is employed to achieve active power interaction while comprehensively addressing power quality issues such as reactive power, harmonics, and three-phase imbalance. This resolves the impact of numerous frequency converters and impact devices in the drilling system on the power grid's power quality, improving power safety. The device prioritizes power quality management for the drilling rig system, eliminating harmonics, reactive power, and three-phase imbalances generated by equipment such as winches, mud pumps, and top drives. This results in energy savings, reduced demand on the power grid's capacity, and improved system power safety and stability.

[0091] The load current and system voltage are detected by CT1. Sampling is performed at 2048 points per power supply cycle using a detection rate of 9.7µs. The instantaneous power value is calculated. Using vector decomposition and instantaneous power extraction methods, the instantaneous power value is decomposed to extract active power P2, reactive power Q21, and harmonic power Q22. The average instantaneous value of reactive power Q21 and harmonic power Q22 is calculated over one cycle, generating a compensation command. A command signal opposite to that of reactive power Q21 and harmonic power Q22 is generated for periodic compensation, eliminating reactive power and harmonic power generated by the load, purifying the power grid, and reducing the apparent power S on the grid side.

[0092] like Figure 6 As shown, the generated reactive and harmonic current command signal is processed by calculation K and compared with the active current value generated by the grid threshold. Simultaneously, the real-time current on the DC side of the Hall current DCT feedback device is processed by K and its output value is compared with the upper side of the hysteresis loop. This value is also compared with the grid voltage sampled by U. SC Together with the adjustment constant 362, the output is calculated using the variable hysteresis formula M to adjust the peak-to-peak value of the hysteresis current. After the system is adjusted by variable hysteresis comparison, the control system is regulated to improve the reliability and accuracy of the control.

[0093] The calculation is performed using the hysteresis formula (1-(X2 / X3)^2)*((2410000+X1^2) / 2410000). (2410000+X1^2) / 2410000 is related to the saturated inductance, and (1-(X2 / X3)^2) is related to the grid voltage. Here, X1 is the cross-sectional area of ​​the magnetic core, X2 is the length of the magnetic circuit, and X3 is the length of the air gap. When the absolute value of the grid voltage is high, the voltage difference between the grid voltage and the DC bus in the same direction is small, the current rises slowly, and the hysteresis width is reduced. When the absolute value of the grid voltage is low, the voltage difference between the grid voltage and the DC bus in the same direction is large, the current rises quickly, and the hysteresis width is expanded.

[0094] Employing a power distribution control algorithm during energy conversion ensures smooth, shock-free diesel generator startup and consistent, stable power output, improving energy conversion efficiency. A slow-speed, second-level bus regulator controls the bus voltage at DC 1200V, allowing the generator to intervene in bus regulation early, avoiding hard-connection. Energy storage elements further adjust the generator power linearly, effectively mitigating load impacts with excess capacity. Figure 7 As shown, the effective energy is the energy provided by the energy storage element. The difference between the power required by the load and the power grid is provided by the energy storage unit and the generator. When the difference in demand remains unchanged, the energy provided by the energy storage element decreases linearly, and the energy provided by the generator increases linearly, so that the generator can be connected linearly and smoothly.

[0095] The active power is calculated by averaging the real-time values ​​(i.e., the detected voltage and current) over 60 seconds. The calculated result is compared with a set threshold P1 for compensation, balancing the grid capacity and generator output capacity. The device provides transient support, ensuring stable generator operation. The feedforward gain is adjusted via PI control; the feedforward gain decreases when the bus voltage is high and increases when the bus voltage is low. The built-in energy storage unit dynamically adjusts the generator for steady-state regulation, using bus voltage fluctuations to adjust generator power fluctuations and control generator output. When load changes exceed the set grid capacity threshold, the supercapacitor's energy is controlled for regulation. Within the grid capacity range, the generator maintains a relatively constant power output, with power fluctuations supported by the supercapacitor, thus reducing generator fluctuations and lowering the unit oil-to-electricity ratio.

[0096] The power dynamic balance multi-source collaborative control device detects real-time sampled values ​​from the load side, device side, and grid side during operation. Through real-time closed-loop feedback correction, it modifies the command signal of the control system, adjusts the output command value, and achieves adaptive adjustment of the control strategy. This ensures power dynamic balance under different operating conditions and achieves the optimal economic operation mode.

[0097] Example 3

[0098] One embodiment of the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the power dynamic balance multi-source collaborative control device of the oilfield drilling rig system.

[0099] Example 4

[0100] In one embodiment of the present invention, a non-transitory computer-readable storage medium is provided for storing computer instructions. When the computer instructions are executed by a processor, the power dynamic balance multi-source collaborative control device of the oilfield drilling rig system is realized.

[0101] Example 5

[0102] One embodiment of the present invention provides an electronic device, including: a processor, a memory, and a computer program; wherein, the processor is connected to the memory, and the computer program is stored in the memory. When the electronic device is running, the processor executes the computer program stored in the memory, so that the electronic device executes the power dynamic balance multi-source collaborative control device of the oilfield drilling rig system.

[0103] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0104] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0105] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A power dynamic balance multi-source collaborative control device for an oilfield drilling rig system, wherein the oilfield drilling rig system includes a load, a power grid, and a generator, characterized in that, The device includes a detection unit, an energy balance unit, a conversion control unit, and a control unit. The detection unit is used to detect the system voltage of the oilfield drilling rig system and the current on the load side, equipment side and power grid side in real time; The control unit is used to determine the real-time active power of the oilfield drilling rig system based on the real-time detection data of the detection unit. If the real-time active power is greater than the preset power grid supply threshold, a compensation command signal is generated based on the capacity gap and sent to the energy balance unit. Otherwise, while the power grid supplies power to the load, the power grid charges the energy storage unit inside the energy balance unit with controllable power. The energy balancing unit is used to compensate for the capacity gap in the power grid by coordinating the power supply of the energy storage unit and the generator according to the compensation command signal. During the coordinating power supply process, the energy provided by the energy storage unit is linearly withdrawn, and the generator is linearly engaged. The conversion control unit is used to regulate the generator power during the linear engagement process of the generator, control the generator to start smoothly without shock, and finally output stable power. The energy balance unit also includes a bidirectional converter, the AC side of which is connected in parallel with the power grid through a first circuit breaker, and the DC side of which is connected in parallel with the energy storage unit through a fuse. The conversion control unit is composed of a unidirectional converter. The AC side of the unidirectional converter is connected to the generator through a second circuit breaker, and the DC side is connected in parallel with the energy balance unit through a fuse.

2. The power dynamic balance multi-source collaborative control device for oilfield drilling rig systems as described in claim 1, characterized in that, The energy balance unit is connected to the power grid in parallel through the first circuit breaker, and the conversion control unit is connected to the generator through the second circuit breaker. The energy balance unit and the conversion control unit are interconnected by a DC conversion switch.

3. The power dynamic balance multi-source collaborative control device for oilfield drilling rig systems as described in claim 1, characterized in that, The detection unit includes: The real-time operating current of the load and the system voltage are detected by the current transformer on the load side. The current compensated by the device in real time is detected by the current transformer on the device side. The current in the power grid is detected by a current transformer on the power grid side; The DC-side current is detected using a DCT.

4. The control method of the power dynamic balance multi-source collaborative control device for oilfield drilling rig systems as described in claim 1, characterized in that, include: Real-time monitoring of system voltage, load side, equipment side, and grid side current of oilfield drilling rig system; Based on the real-time detection data of the detection unit, the real-time active power of the oilfield drilling rig system is determined. If the real-time active power is greater than the preset power grid supply threshold, a compensation command signal is generated based on the capacity gap. Otherwise, while the power grid supplies power to the load, the power grid also charges the energy storage unit inside the energy balance unit with controllable power. According to the compensation command signal, the capacity gap of the power grid is compensated by the coordinated power supply of energy storage units and generators. During the coordinated power supply process, the energy provided by the energy storage units is linearly withdrawn, and the generators are linearly engaged. During the linear intervention process of the generator, the generator power is adjusted to ensure a smooth and shock-free generator start-up, ultimately resulting in a stable power output.

5. The control method of the power dynamic balance multi-source collaborative control device for oilfield drilling rig systems as described in claim 4, characterized in that, The coordinated power supply of the energy storage unit and the generator is specifically as follows: When the load fluctuation power exceeds the grid power supply threshold, the internal energy storage unit is controlled to provide short-term energy support to the load. When the load power demand exceeds the maximum energy that the energy storage unit can provide, the generator power is controlled according to the capacity gap, and the generator supplies power to the load, thereby controlling the power demand of the power grid and stabilizing the AC voltage of the system.

6. The control method of the power dynamic balance multi-source collaborative control device for oilfield drilling rig systems as described in claim 4, characterized in that, The linear intervention of the generator employs a power distribution control algorithm during energy conversion, specifically: By collecting the remaining power, output voltage and current of the energy storage unit, and the power generation parameters of the generator in real time, and combining historical operating data and the generator's equipment model, the power demand and mechanical stress state during the generator startup process can be accurately predicted. The generator is provided with startup energy in a slow and incremental manner to avoid instantaneous high power surges.

7. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium is used to store computer instructions, which, when executed by a processor, implement the control method of the power dynamic balance multi-source collaborative control device for an oilfield drilling rig system as described in any one of claims 4-6.

8. An electronic device, characterized in that, include: The device includes a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory to enable the electronic device to perform a control method for implementing the power dynamic balance multi-source collaborative control device of the oilfield drilling rig system as described in any one of claims 4-6.

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