Drilling hybrid energy storage system based on super capacitor and battery

Abstract

The utility model relates to a drilling hybrid energy storage system based on a super capacitor and a battery, and the system is characterized in that the system comprises a first power generation module, a DC bus, an energy storage system, and an inversion unit; the output end of the first power generation module is electrically connected with the direct-current bus through the first incoming circuit breaker and is suitable for transmitting electric energy output by the first power generation module to the direct-current bus; the output end of the direct current bus is electrically connected with the input end of the inversion unit through the first direct current feed cabinet, the second direct current feed cabinet and the direct current wire inlet cabinet; the direct-current bus is electrically connected with the energy storage system through the second incoming circuit breaker, and the energy storage system is suitable for storing redundant electric energy generated by the first power generation module; the energy storage system includes: a supercapacitor; the supercapacitor is electrically connected with the direct-current bus in a bidirectional mode and is suitable for storing electric energy of the direct-current bus when the electric energy of the direct-current bus is sufficient and outputting the electric energy to the direct-current bus when the electric energy of the direct-current bus is insufficient.

Description

Technical Field

[0001] This application relates to the technical field of oil drilling, and particularly to a drilling hybrid energy storage system based on supercapacitors and batteries. Background Art

[0002] In the oil drilling industry, the traditional drilling technology using diesel generators as the main energy source is a mature technology, mainly including: diesel generators, fuel storage and processing, energy management and control, as well as maintenance and repair, etc. Because diesel generators can provide stable and reliable power supply, and have a relatively high energy density, and start quickly and operate simply, and reach the full load operation state soon after starting. Drilling equipment requires a stable power supply to maintain its normal operation, but the power required by drilling equipment is fixed. During the power supply process, the generator will generate excess electric energy. If this part of the electric energy is not stored, it will cause serious energy waste, pollute the environment, and have a negative impact on human health. Summary of the Invention

[0003] In view of this, this application proposes a drilling hybrid energy storage system based on supercapacitors and batteries.

[0004] According to one aspect of this application, there is provided a drilling hybrid energy storage system based on supercapacitors and batteries, characterized by including: a first power generation module, a DC bus, an energy storage system, and an inverter unit;

[0005] The output end of the first power generation module is electrically connected to the DC bus through a first incoming line circuit breaker, and is suitable for delivering the electric energy output by the first power generation module to the DC bus; the output end of the DC bus is respectively electrically connected to the input ends of the inverter unit through a first incoming line switch of the DC feeder cabinet, a second incoming line switch of the DC feeder cabinet, and a third incoming line circuit breaker; the DC bus is electrically connected to the energy storage system through a second incoming line circuit breaker, and the energy storage system is suitable for storing the excess electric energy generated by the first power generation module;

[0006] The energy storage system includes: supercapacitors; the supercapacitors are bidirectionally electrically connected to the DC bus, and are suitable for storing the electric energy of the DC bus when the electric energy of the DC bus is sufficient, and for outputting the electric energy to the DC bus when the electric energy of the DC bus is insufficient;

[0007] The inverter unit includes: more than two first inverters; the input ends of more than two first inverters are all electrically connected to the DC bus; the output ends of more than two first inverters are suitable for being respectively electrically connected to the electrical equipment of the drilling equipment.

[0008] In a possible implementation manner, the first power generation module includes: more than two first generators, and more than two first rectification devices;

[0009] The output terminals of two or more first generators are electrically connected to the input terminals of two or more first rectifying devices respectively; the output terminals of two or more first rectifying devices are all electrically connected to the first incoming line circuit breaker, and the first rectifying device is applicable to convert the alternating current generated by the first generator into direct current and transmit it to the first incoming line circuit breaker.

[0010] In a possible implementation, there are two or more first power generation modules.

[0011] In a possible implementation, it further includes: a first current acquisition device;

[0012] The first current acquisition device is electrically connected to the output terminal of the first power generation module and is applicable to detect the current value output by the first power generation module.

[0013] In a possible implementation, it includes: a second current acquisition device;

[0014] The second current acquisition device is electrically connected between the energy storage system and the second incoming line circuit breaker and is applicable to detect the current value between the energy storage system and the second incoming line circuit breaker.

[0015] In a possible implementation, it further includes: a PCS power cabinet, a second power generation module and an AC bus;

[0016] The first output terminal of the second power generation module is electrically connected to the AC bus through a switch cabinet; the AC bus is electrically connected to external devices, and the second power generation module is applicable to supply power to external devices;

[0017] The DC bus is electrically connected to the power input terminal of the PCS power cabinet. The PCS power cabinet is applicable to store the electric energy transmitted by the DC bus. The power output terminal of the PCS power cabinet is electrically connected to the AC bus through a switch cabinet and is applicable to transmit electric energy to the AC bus.

[0018] In a possible implementation, the second output terminal of the second power generation module is electrically connected to the power input terminal of the PCS power cabinet, and the PCS power cabinet is applicable to store the electric energy transmitted by the second power generation module.

[0019] In a possible implementation, the second power generation module includes: a second generator, a second rectifying device and a second inverter;

[0020] The power output terminal of the second generator is electrically connected to the input terminal of the second rectifying device, and the output terminal of the second rectifying device is electrically connected to the power input terminal of the PCS power cabinet and the input terminal of the second inverter;

[0021] The output terminal of the second inverter is electrically connected to the input terminal of the switch cabinet.

[0022] In a possible implementation, it further includes: a first transformer and a second transformer;

[0023] The power output terminal of the PCS power cabinet is electrically connected to the input terminal of the switch cabinet through the first transformer, and the output terminal of the second inverter is electrically connected to the input terminal of the switch cabinet through the second transformer.

[0024] Beneficial effects: The remaining power generated by the first power generation module will be delivered to the energy storage system through the second incoming line circuit breaker for charging, avoiding serious loss of excess electric energy, improving the utilization efficiency of electricity, being beneficial to environmental protection and resource conservation. At the same time, when the generator suddenly loses power, the energy storage system discharges to supply power to the electrical equipment of the drilling rig, enabling it to continue normal drilling operations and avoiding the occurrence of sticking accidents, thereby prolonging the service life of the drilling rig.

[0025] Other features and aspects of the present application will become clear from the following detailed description of the exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings included in and constituting a part of the specification, together with the specification, illustrate the exemplary embodiments, features, and aspects of the present application and are used to explain the principles of the present application.

[0027] Figure 1 The main structure diagram of the drilling hybrid energy storage system based on supercapacitor and battery showing the embodiments of the present application;

[0028] Figure 2 The partial circuit diagram of the drilling hybrid energy storage system based on supercapacitor and battery showing the embodiments of the present application;

[0029] Figure 3 Showing Figure 2 the control loop circuit diagram;

[0030] Figure 4 The electrical detection circuit diagram of the drilling hybrid energy storage system based on supercapacitor and battery showing the embodiments;

[0031] Figure 5 The electrical detection circuit diagram of the drilling hybrid energy storage system based on supercapacitor and battery showing the embodiments;

[0032] Figure 6 Showing Figure 3 the partial enlarged view;

[0033] Figure 7 Showing Figure 3 the partial enlarged view;

[0034] Figure 8 Showing Figure 1 the partial enlarged view;

[0035] Figure 9 ShowingFigure 1 Partial enlarged view of;

[0036] Figure 10 Shows Figure 1 Partial enlarged view of. Detailed implementation manners

[0037] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0038] Among them, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0040] The special word "exemplary" here means "serving as an example, an embodiment or an illustration". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments.

[0041] In addition, for better explaining the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, elements and circuits well-known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0042] Figure 1 Shows the main structure diagram of the drilling hybrid energy storage system based on supercapacitor and battery according to the embodiment of the present application; As Figure 1As shown, a drilling hybrid energy storage system based on supercapacitors and batteries includes: a first power generation module 100, a DC bus 300, an energy storage system 400, and an inverter unit; the output end of the first power generation module 100 is electrically connected to the DC bus 300 through a first incoming line circuit breaker ACB1, which is suitable for delivering the electric energy output by the first power generation module 100 to the DC bus 300; the output end of the DC bus 300 is electrically connected to the input end of the inverter unit through a first incoming line switch 600 of the DC power supply cabinet, a second incoming line switch 610 of the DC power supply cabinet, and a third incoming line circuit breaker 500 respectively; the DC bus 300 is electrically connected to the energy storage system 400 through a second incoming line circuit breaker ACB2, and the energy storage system 400 is suitable for storing the redundant electric energy generated by the first power generation module 100; the energy storage system 400 includes: supercapacitors; the supercapacitors are bidirectionally electrically connected to the DC bus 300; the inverter unit includes: two or more first inverters 700; the input ends of the two or more first inverters 700 are all electrically connected to the DC bus 300; the output ends of the two or more first inverters 700 are suitable for being electrically connected to the electrical equipment of the drilling equipment respectively.

[0043] Here, it should be noted that the first power generation module 100 is suitable for providing power for the electrical equipment of the drilling equipment. The DC bus 300 serves as a connection bridge between various electrical appliances and can achieve power grid connection. It can not only receive the electric energy generated by the first power generation module 100, distribute the electric energy to the electrical equipment of the drilling equipment, but also transmit the electric energy to the energy storage system 400, enabling the energy storage system 400 to store the excess electricity. The first incoming line circuit breaker ACB1 is suitable for controlling the connection on and off between the first power generation module 100 and the DC bus 300. The first incoming line switch 600 of the DC power distribution cabinet and the second incoming line switch 610 of the DC power distribution cabinet serve as connection bridges between the DC bus 300 and the inverter unit and are suitable for supplying power to the mud pump motor. The third incoming line circuit breaker 500 serves as a connection bridge between the DC bus 300 and the inverter unit and is suitable for supplying power to the rotary table motor and the drawworks motor. The second incoming line circuit breaker ACB2 is suitable for controlling the connection on and off between the DC bus 300 and the energy storage system 400. The energy storage system 400 uses supercapacitors, and the supercapacitors are used to store electric energy; the supercapacitors make up for the gap in performance between batteries and capacitors, comparable to the energy density of batteries and the power density comparable to capacitors. As a new type of green energy storage device, it has characteristics such as high power density, long cycle life, environmental friendliness, and fast charge and discharge speed. Under normal conditions, the first power generation module 100 generates DC600V direct current, which is transmitted to the DC bus 300 through the first incoming line circuit breaker ACB1 as DC600V direct current. The DC600V direct current is output as AC600V voltage through the inverter of the inverter unit, and the AC600V voltage is then transmitted to the electrical equipment of the drilling equipment (such as the drawworks, mud pump, rotary table, etc.) to work. At the same time, the remaining power generated by the first power generation module 100 will be transmitted to the energy storage system 400 through the second incoming line circuit breaker ACB2 for charging, avoiding serious loss of excess electric energy, improving the utilization efficiency of electricity, and being beneficial to environmental protection and resource conservation. At the same time, when the first power generation module 100 suddenly loses power, the energy storage system 400 discharges to supply power to the electrical equipment of the drilling equipment, enabling it to continue normal drilling operations and avoiding the occurrence of sticking accidents, so as to extend the service life of the drilling equipment.

[0044] Preferably, the supercapacitor is composed of 4 groups of 300KW, DC600V capacitor modules connected in parallel.

[0045] In a possible implementation, the first power generation module 100 includes: more than two first generators 110, and more than two first rectifying devices 120; the output ends of the more than two first generators 110 are respectively electrically connected to the input ends of the more than two first rectifying devices 120; the output ends of the more than two first rectifying devices 120 are all electrically connected to the first incoming line circuit breaker ACB1, and the first rectifying device 120 is adapted to convert the alternating current generated by the first generator 110 into direct current and transmit it to the first incoming line circuit breaker ACB1. As Figure 1 shown, each first generator 110 is equipped with a first rectifying device 120. The first generator 110 is adapted to output AC420V alternating current, and the first rectifying device 120 is adapted to convert the AC420V alternating current into DC600V direct current. The output ends of all the first rectifying devices 120 are connected in parallel and then electrically connected to the first incoming line circuit breaker ACB1.

[0046] Furthermore, the first power generation module 100 further includes: more than two switch and copper bars 130. The output ends of the more than two first rectifying devices 120 are respectively electrically connected to the more than two switch and copper bars 130 through switches, and the copper bar 130 is electrically connected to the first incoming line circuit breaker ACB1. The copper bar 130, as a connection bridge between the first power generation module 100 and the first incoming line circuit breaker ACB1, has excellent electrical conductivity, can effectively conduct current and is corrosion-resistant, and is suitable for long-term use.

[0047] Preferably, the first power generation module 100 is provided with four first generators 110, four first rectifying devices 120, and four switches. The four first generators 110 are electrically connected to the four first rectifying devices 120 in a one-to-one correspondence.

[0048] In a possible implementation, more than two first power generation modules 100 are provided. It should be noted that in order to ensure sufficient power supply to the electrical equipment, the number of the first power generation modules 100 can be adjusted according to the number and type of the electrical equipment. Preferably, as Figure 1 shown, two first power generation modules 100 are provided. One of the first power generation modules 100 is electrically connected to the DC bus 300 through the first incoming line circuit breaker ACB1, and the other first power generation module 100 is electrically connected to the DC bus 300 through the fourth incoming line circuit breaker 200.

[0049] It should be noted that the first incoming line circuit breaker ACB1 and the second incoming line circuit breaker ACB2 are integrated in the same DC incoming line cabinet +D-A1; the fourth incoming line circuit breaker 200 and the third incoming line circuit breaker 500 are integrated in the same DC incoming line cabinet +D-A2. The power input ends of the DC incoming line cabinet +D-A1 and the DC incoming line cabinet +D-A2 are connected to the DC24V control power supply through the rectifier UY1 and to the DC±15V control power supply through the rectifier UY2. The first incoming line switch 600 and the second incoming line switch 610 of the DC power distribution cabinet are both integrated in the DC power distribution cabinet +D-A91.

[0050] In a possible implementation manner, it further includes: a first current acquisition device 131; as Figure 2 shown, the first current acquisition device 131 is electrically connected to the output end of the first power generation module 100 and is suitable for detecting the current value output by the first power generation module 100.

[0051] In a possible implementation manner, it further includes: a second current acquisition device 411; as Figure 2 shown, the second current acquisition device 411 is electrically connected between the energy storage system 400 and the second incoming line circuit breaker ACB2 and is suitable for detecting the current value between the super capacitor and the second incoming line circuit breaker ACB2. It should be noted that both the first current acquisition device 131 and the second current acquisition device 411 adopt Hall current sensors.

[0052] As Figure 3As shown in the figure, it further includes: the closing and opening control circuit of the first power generation module; the closing and opening control circuit of the first power generation module is divided into three circuits with interlocks. The first circuit 210 is provided with a self-locking control relay KM11 for the closing circuit. The second circuit 220 is the circuit with the closing coil XF. The third circuit 230 is the circuit with the under-voltage release coil MN. The working principle is as follows: The opening button SB12 of the first circuit 210 and the first incoming line circuit breaker ACB1 are in a closed state. After the closing button SB11 is pressed, the self-locking control relay KM11 is energized, and then the first circuit 210 operates automatically. If the circuit breaker completes energy storage and then the SB11 button is pressed, the first incoming line circuit breaker ACB1 automatically stores energy and closes. XF is the closing coil, and when there is AC220V voltage at both ends of the coil, the coil operates. For the third circuit 230: when the voltage in the circuit is in an under-voltage state, the under-voltage release coil MN disconnects, and the first incoming line circuit breaker ACB1 automatically opens. The normally open contact K of the generator circuit breaker on the third circuit 230 is an external signal, and the contact closes after the first power generation module is powered on; the normally open contact S3 of the external circuit breaker on the third circuit 230 closes after being energized; the emergency stop signal K3 of the first power generation module 100 on the third circuit 230 remains normally closed. When the emergency stop is pressed, the normally closed contact disconnects, thus realizing the opening of the first incoming line circuit breaker ACB1 and disconnecting between the first power generation module 100 and the DC bus 300.

[0053] It further includes: the closing and opening control circuit of the energy storage system, as Figure 3 shown in the figure, the closing and opening control circuit of the energy storage system is divided into three circuits with interlocks. Similarly, the second circuit 520 is the circuit with the closing coil XF, and the third circuit 530 is the circuit with the under-voltage release coil MN. The opening button SB22 of the first circuit 510 and the second incoming line circuit breaker ACB2 are in a closed state. After the closing button SB21 is pressed, the self-locking control relay KM21 is energized, and then the first circuit 510 operates automatically. The closing coil of the second circuit 520 automatically stores energy and closes after the circuit breaker completes automatic energy storage. The normally open contact K of the circuit breaker of the energy storage system on the third circuit 530 is an external signal, and it closes after being energized; the emergency stop signal K3 of the energy storage system 400 on the third circuit 530 remains normally closed. When the emergency stop is pressed, the normally closed contact disconnects, thus realizing the opening of the second incoming line circuit breaker ACB2.

[0054] as Figure 6As shown in the figure, the closing and opening control circuit of the first power generation module is provided with a controller; the controller is electrically connected to the first incoming line circuit breaker ACB1, and its main function is to realize the intelligent control and protection of the first incoming line circuit breaker ACB1. It conducts real-time monitoring and management of the circuit by integrating functions such as measurement, monitoring, control, communication, and protection. The intelligent controller can automatically detect abnormal conditions in the circuit, such as overload, short circuit, undervoltage, etc., and automatically cut off the circuit when necessary to protect the safety of the line and equipment. In addition, it can also improve the sensitivity and accuracy of the tripping output by optimizing the protection algorithm, effectively avoiding misoperation or delayed operation, and ensuring the stable operation of the system. Similarly, the closing and opening control circuit of the energy storage system is also provided with a controller; the controller is electrically connected to the second incoming line circuit breaker ACB2.

[0055] As Figure 6 shown in the figure, the closing and opening control circuit of the first power generation module is provided with a storage motor (MCH), and the storage motor (MCH) is electrically connected to the first incoming line circuit breaker ACB1. It is applicable that after the first incoming line circuit breaker ACB1 trips, the storage motor (MCH) can automatically store energy for the closing operation of the first incoming line circuit breaker ACB1, ensuring that the first incoming line circuit breaker ACB1 can complete the closing action quickly and accurately. Similarly, the closing and opening control circuit of the energy storage system is also provided with a storage motor (MCH), and the storage motor (MCH) is electrically connected to the second incoming line circuit breaker ACB2.

[0056] In a possible implementation manner, as Figure 7 shown in the figure, it further includes: a DC power distribution cabinet + D - A91; the first incoming line switch 600 and the second incoming line switch 610 of the DC power distribution cabinet are both integrated in the DC power distribution cabinet + D - A91, and their function is to control the mud pump motor. The power input end of the DC power distribution cabinet + D - A91 is connected to the DC24V power supply through the rectifier UY1 and to the DC±15V power supply through the rectifier UY2.

[0057] In a possible implementation manner, as Figure 7 shown in the figure, it further includes: a PCS power supply cabinet + D - A94 (i.e., the PCS power supply cabinet 810); its function is the storage and conversion of energy. The power input end of the PCS power supply cabinet 810 is connected to the DC24V power supply through the rectifier UY1 and to the DC±15V power supply through the rectifier UY2.

[0058] In a possible implementation manner, as Figure 7 shown in the figure, it further includes: a drilling feed cabinet + D - A52; its function is to control the drilling pressure feed, tripping, casing running, handling downhole complex situations, and assisting in lifting heavy objects, etc. The power input end of the drilling feed cabinet + D - A52 is connected to the DC24V power supply through the rectifier UY1 and to the DC±15V power supply through the rectifier UY2, and the output end of the drilling feed cabinet + D - A52 is electrically connected to the drilling feed motor 715.

[0059] In a possible implementation, it further includes: a DC bus voltage detection device, which is applicable to detect the voltage of the DC bus 300. The DC bus voltage detection device includes: a voltmeter P1, a safety isolator U2, and a safety isolator U5; all three are connected to the 24V power supply voltage. As Figure 4 shown, the 3 / 1 point of the safety isolator U2 is electrically connected to the DC bus 300 for collecting the voltage of the DC bus 300, converting it into 4 - 20mA and then outputting it to the 5 / 6 point of the safety isolator U2. The 5 / 6 point of the safety isolator U2 is electrically connected to the 2 / 1 point of the safety isolator U5. The 7 / 8 point of the safety isolator U5 is electrically connected to the 2 / 11 point of the voltmeter P1 to transmit the detection signal to the voltmeter P1 for display. At the same time, the 5 / 6 point of the safety isolator U5 is electrically connected to the touch screen X2, and the touch screen X2 displays the voltage data of the DC bus 300.

[0060] In a possible implementation, it further includes: a first power generation module voltage detection device, which is applicable to detect the output voltage of the first power generation module 100. The first power generation module voltage detection device includes: a voltmeter P2, a safety isolator U3, and a safety isolator U6; all three are connected to the 24V power supply voltage. The safety isolator U3 is electrically connected to the bus bar 130 at the power output end of the first power generation module 100 for collecting the voltage output by the first power generation module 100. The 5 / 6 point of the safety isolator U3 is electrically connected to the 2 / 1 point of the safety isolator U6. The 7 / 8 point of the safety isolator U6 is electrically connected to the 2 / 11 point of the voltmeter P2 to transmit the detection signal to the voltmeter P2 for display. At the same time, the 5 / 6 point of the safety isolator U6 is electrically connected to the touch screen X2, and the touch screen X2 displays the voltage data of the first power generation module 100.

[0061] In a possible implementation, it further includes: an energy storage system voltage detection device; the energy storage system voltage detection device is applicable to detect the input and output voltage of the energy storage system 400. The energy storage system voltage detection device includes: a voltmeter P3, a safety isolator U4, and a safety isolator U7; all three are connected to the 24V power supply voltage. The safety isolator U4 is electrically connected to the bus bar 410 at the input end of the supercapacitor for collecting the voltage input by the supercapacitor. The safety isolator U4 is electrically connected to the safety isolator U7, and the safety isolator U7 is electrically connected to the voltmeter P3 to transmit the detection signal to the voltmeter P3 for display. The safety isolator U7 is also electrically connected to the touch screen X2, and the touch screen X2 displays the voltage data of the energy storage system 400.

[0062] In a possible implementation, it further includes: a first incoming line breaker indicator light H1 and a second incoming line breaker indicator light H2; the first incoming line breaker indicator light H1 is electrically connected to the first incoming line breaker ACB1, and when the first incoming line breaker ACB1 is closed, the first incoming line breaker indicator light H1 is lit. The second incoming line breaker indicator light H2 is electrically connected to the second incoming line breaker ACB2, and when the second incoming line breaker ACB2 is closed, the second incoming line breaker indicator light H2 is lit.

[0063] In a possible implementation, it further includes: a PCS power cabinet 810, a second power generation module 800, and an AC bus 890; the first output terminal of the second power generation module 800 is electrically connected to the AC bus 890 through a switch cabinet 880; the AC bus 890 is electrically connected to external devices, and the second power generation module 800 is suitable for supplying power to external devices (400V electrical equipment and living areas). The DC bus 300 is electrically connected to the power input terminal of the PCS power cabinet 810, the PCS power cabinet 810 is suitable for storing the electrical energy transmitted by the DC bus 300, and the power output terminal of the PCS power cabinet 810 is electrically connected to the AC bus 890 through the switch cabinet 880, and is suitable for transmitting electrical energy to the AC bus 890. As Figure 1 shown, the second power generation module 800 is suitable for providing AC400V alternating current to the switch cabinet 880, and the switch cabinet 880 transmits the AC400V alternating current to the AC bus 890; the PCS power cabinet 810 is suitable for storing the electrical energy transmitted by the DC bus 300 and can transmit electrical energy to the AC bus 890, and the AC bus 890 aggregates the electrical energy generated by the second power generation module 800 and the electrical energy generated by the PCS power cabinet 810.

[0064] In a possible implementation, the output terminal of the switch cabinet 880 is electrically connected to the input terminal of the MCC cabinet 891 through the AC bus 890, and the output terminal of the MCC cabinet 891 is electrically connected to an oil pump motor and a water pump motor. The MCC cabinet 891 is used to control the remote and local stop of small motors such as motor oil pumps and water pumps; at the same time, the MCC cabinet 891 is also equipped with a soft starter to avoid starting the motor with large current.

[0065] In a possible implementation, the second output terminal of the second power generation module 800 is electrically connected to the power input terminal of the PCS power cabinet 810, and the PCS power cabinet 810 is suitable for storing the electrical energy transmitted by the second power generation module 800; here, it should be noted that the PCS power cabinet 810 can not only store the redundant electrical energy on the DC bus 300 but also store the redundant electrical energy generated by the second power generation module 800, so as to maximize energy conservation.

[0066] Further, the second power generation module 800 includes: a second generator 820, a second rectifying device 830, and a second inverter 840; a power output terminal of the second generator 820 is electrically connected to an input terminal of the second rectifying device 830, an output terminal of the second rectifying device 830 is electrically connected to a power input terminal of the PCS power cabinet 810 and an input terminal of the second inverter 840; the second rectifying device 830 is adapted to convert alternating current generated by the second generator 820 into direct current and then transmit it to the PCS power cabinet 810 and the second inverter 840; an output terminal of the second inverter 840 is electrically connected to an input terminal of the switch cabinet 880, and the second inverter 840 is adapted to convert the direct current into alternating current again and then transmit it to the switch cabinet 880, and the switch cabinet 880 then transmits the alternating current to the AC bus 890.

[0067] In a possible implementation manner, it further includes: a first transformer 870 and a second transformer 850; a power output terminal of the PCS power cabinet 810 is electrically connected to an input terminal of the switch cabinet 880 through the first transformer 870, and an output terminal of the second inverter 840 is electrically connected to an input terminal of the switch cabinet 880 through the second transformer 850.

[0068] In a possible implementation manner, a second output terminal of the second power generation module 800 is electrically connected to a power input terminal of the PCS power cabinet 810 through a copper bar; an output terminal of the second transformer 850 is electrically connected to an input terminal of the switch cabinet 880 through a copper bar 860.

[0069] In a possible implementation manner, the DC bus 300 is electrically connected to an input terminal of a first incoming line switch 600 of the DC power distribution cabinet, a second incoming line switch 610 of the DC power distribution cabinet, and a third incoming line circuit breaker 500; an output terminal of the first incoming line switch 600 of the DC power distribution cabinet is simultaneously electrically connected to input terminals of four first inverters 700 of the inverter unit, an output terminal of the second incoming line switch 610 of the DC power distribution cabinet is simultaneously electrically connected to input terminals of four first inverters 700 of the inverter unit, and an output terminal of the third incoming line circuit breaker 500 is simultaneously electrically connected to input terminals of six first inverters 700 of the inverter unit. That is, Figure 1As shown, the inverter unit is provided with a total of 14 first inverters 700, and the output terminals of the 14 first inverters 700 are adapted to be electrically connected to the electrical equipment of the drilling equipment respectively. Further, the output terminal of the first incoming line switch 600 of the DC power supply cabinet is electrically connected to the 1# mud pump A motor 701, the 1# mud pump B motor 702, the 1# mud pump C motor 703, and the 1# mud pump D motor 704 in sequence through four first inverters 700; the output terminal of the second incoming line switch 610 of the DC power supply cabinet is electrically connected to the 2# mud pump A motor 705, the 2# mud pump B motor 706, the 2# mud pump C motor 707, and the 2# mud pump D motor 708 in sequence through four first inverters 700; the output terminal of the third incoming line circuit breaker 500 is electrically connected to the winch A motor 709, the winch A motor 711, the winch B motor 712 (for driving the drilling rig to complete the drilling and hoisting operation), the rotary table motor 713 (for drilling operation), and the braking resistor 714 in sequence through six first inverters 700. The braking resistor 714 is used for rapid braking and consuming the excess energy of the motor.

[0070] In a possible implementation manner, it further includes: a third inverter 710, the input terminal of the third inverter 710 is electrically connected to the DC bus 300, and the output terminal of the third inverter 710 is electrically connected to the feed drilling motor 715.

[0071] In a possible implementation manner, it further includes: a touch screen 720 and an industrial control computer 730; both the touch screen 720 and the industrial control computer 730 are electrically connected to the 14 first inverters 700 and the third inverter 710. The touch screen 720 is used to display the working states or working data of the 14 first inverters 700 and the third inverter 710, and the industrial control computer 730 performs data recording.

[0072] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.

Claims

1. A drilling hybrid energy storage system based on supercapacitors and batteries, characterized in that, Including: A first power generation module, a DC bus, an energy storage system and an inverter unit; The output end of the first power generation module is electrically connected to the DC bus through a first incoming line breaker, and is suitable for delivering the electric energy output by the first power generation module to the DC bus; the output end of the DC bus is electrically connected to the input end of the inverter unit through a first incoming line switch of the DC feeder cabinet, a second incoming line switch of the DC feeder cabinet, and a third incoming line breaker respectively; the DC bus is electrically connected to the energy storage system through a second incoming line breaker, and the energy storage system is suitable for storing the surplus electric energy generated by the first power generation module; The energy storage system includes: a super capacitor; the super capacitor is bidirectionally electrically connected to the DC bus, and is suitable for storing the electric energy of the DC bus when the electric energy of the DC bus is sufficient, and is suitable for outputting electric energy to the DC bus when the electric energy of the DC bus is insufficient; The inverter unit includes: more than two first inverters; the input ends of more than two first inverters are all electrically connected to the DC bus; the output ends of more than two first inverters are suitable for being electrically connected to the electrical equipment of the drilling equipment respectively.

2. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 1, wherein The first power generation module includes: more than two first generators, more than two first rectification devices; The output ends of more than two first generators are electrically connected to the input ends of more than two first rectification devices respectively; the output ends of more than two first rectification devices are all electrically connected to the first incoming line breaker, and the first rectification device is suitable for converting the alternating current generated by the first generator into direct current and delivering it to the first incoming line breaker.

3. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 2, wherein There are more than two first power generation modules.

4. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 1, characterized in that, It also includes: A first current acquisition device; The first current acquisition device is electrically connected to the output end of the first power generation module and is suitable for detecting the current value output by the first power generation module.

5. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 1, characterized in that Including: A second current acquisition device; The second current acquisition device is electrically connected between the energy storage system and the second incoming line breaker and is suitable for detecting the current value between the energy storage system and the second incoming line breaker.

6. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 1, characterized in that, It also includes: A PCS power cabinet, a second power generation module and an AC bus; The first output end of the second power generation module is electrically connected to the AC bus through a switch cabinet; the AC bus is suitable for being electrically connected to external equipment to supply power to the external equipment; The DC bus is electrically connected to the power input end of the PCS power cabinet, the PCS power cabinet is suitable for storing the electric energy delivered by the DC bus, and the power output end of the PCS power cabinet is electrically connected to the AC bus through the switch cabinet and is suitable for delivering electric energy to the AC bus.

7. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 6, wherein The second output end of the second power generation module is electrically connected to the power input end of the PCS power cabinet, and the PCS power cabinet is suitable for storing the electric energy delivered by the second power generation module.

8. The hybrid energy storage system for drilling based on supercapacitors and batteries according to claim 7, characterized in that, The second power generation module includes: a second generator, a second rectification device and a second inverter; The power output terminal of the second generator is electrically connected to the input terminal of the second rectifying device, and the output terminal of the second rectifying device is electrically connected to the power input terminal of the PCS power cabinet and the input terminal of the second inverter; The output terminal of the second inverter is electrically connected to the input terminal of the switch cabinet.

9. The drilling hybrid energy storage system based on supercapacitors and batteries according to claim 8, wherein, It further includes: A first transformer and a second transformer; The power output terminal of the PCS power cabinet is electrically connected to the input terminal of the switch cabinet through the first transformer, and the output terminal of the second inverter is electrically connected to the input terminal of the switch cabinet through the second transformer.

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