Hybrid power well cementation electric control system architecture

Abstract

The invention discloses a hybrid power well cementation electric control system architecture, which is mounted on a well cementation truck / pry, and comprises a power input module and three parallel power supply accesses: one engine is connected with a generator, and the generator is connected to a direct current bus through a first controllable rectifier; the two power batteries are connected to a direct-current bus through a direct-current feed unit; the third external power grid is connected to the direct current bus through the alternating current feed unit and the second controllable rectifier in sequence; the power output module comprises a DC / AC driver and a DC / DC power supply which are powered by a DC bus, and the DC / AC driver respectively drives a main drive motor and an auxiliary drive motor; and the control module comprises a PLC control system powered by a DC / DC power supply and an EMS management system in communication connection with each component, and the EMS management system regulates and controls the electric energy output proportion of the three power supply paths in real time. Compared with existing diesel-driven well cementation equipment, the diesel-driven well cementation equipment is high in integration level, high in equipment efficiency and high in electric / automatic degree.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil and gas well cementing equipment operation. More particularly, the present application relates to a hybrid power cementing electric control system architecture. BACKGROUND

[0002] In the existing diesel engine driven cementing equipment, the engine drives the cementing pump operation through a gearbox for speed reduction. Since the engine fuel efficiency is low and the mechanical efficiency is low after transmission through the gearbox, the diesel engine output power is wasted seriously, and a larger power engine has to be configured. In addition, a small amount of electric cementing equipment is applied in oilfields, but the power of the existing electric cementing equipment mainly comes from the power grid of the drilling site. However, due to the large power of the motor of the electric cementing equipment, the output current is large, which causes the workers to have a large labor intensity in laying, collecting, connecting and disconnecting wires, and seriously affects the overall work efficiency of the cementing operation. The above problems need to be solved by the present application. SUMMARY

[0003] The purpose of the present application is to provide a hybrid power cementing electric control system architecture, which uses a generator, a power battery and a power grid to form a direct current microgrid to provide power for the main drive and auxiliary drive motors, thereby driving the cementing pump operation. Compared with the existing diesel-driven cementing equipment, the structure is novel, completely overturns the existing diesel-driven cementing structure mode, has high integration, high equipment efficiency and high degree of electrification / automation.

[0004] The technical solution adopted by the present application to solve the technical problem is to provide a hybrid power cementing electric control system architecture, comprising: a power input module comprising three parallel power supply paths: a first power supply path, in which an engine is connected to a generator, and the generator is connected to a direct current bus through a first controllable rectifier; a second power supply path, in which a power battery is connected to the direct current bus through a direct current feeder unit; a third power supply path, in which an external power grid is connected to the direct current bus through an alternating current feeder unit and a second controllable rectifier in sequence; a power output module comprising a plurality of DC / AC drivers and DC / DC power supplies powered by the direct current bus, and a plurality of DC / AC drivers driving a main drive motor and a plurality of auxiliary drive motors, respectively; a control module comprising a PLC control system and an EMS management system, wherein the PLC control system is powered by the DC / DC power supply, and the EMS management system is in communication connection with the engine, the generator, the first controllable rectifier, the second controllable rectifier, the power battery, the DC / AC driver and the PLC control system.

[0005] Preferably, the hybrid cementing electric control system architecture, the engine, the generator, the first controllable rectifier, the power battery, the DC feeder unit, the external power grid, the AC feeder unit, the second controllable rectifier, the DC bus, the DC / AC driver, the main drive motor, the auxiliary drive motor, the DC / DC power supply, the PLC control system and the EMS management system are all integrated and installed on the cementing truck / skid.

[0006] Preferably, the hybrid cementing electric control system architecture, the three power supply paths in the power input module can independently power the power output module or power the power output module in a hybrid power supply mode. When the hybrid power supply mode is adopted, the power output ratio between the power supply paths is adjusted by the EMS management system in real time according to the actual cementing working conditions.

[0007] Preferably, the hybrid cementing electric control system architecture, when the hybrid power supply mode is adopted, the EMS management system executes the following power supply control strategy: Primary power supply stage: cut off the first power supply path and the third power supply path, only supply power to the DC bus through the second power supply path; Secondary power supply stage: according to the load data of the DC / AC driver, when the power supply capacity of the power battery is exceeded, start the first power supply path, control the engine to run in the high efficiency speed interval, and supply power through the generator and the power battery in combination; Tertiary power supply stage: according to the load data of the DC / AC driver, when the combined power supply capacity of the power battery and the generator is exceeded, start the third power supply path, and supply power through the external power grid, the generator and the power battery in combination.

[0008] Preferably, the hybrid cementing electric control system architecture, when the cementing truck / skid stops working, the EMS management system executes the following charging control strategy: When the external power grid is available, convert the three-phase alternating current of the external power grid into direct current through the second controllable rectifier, transmit it to the DC feeder unit through the DC bus, and charge the power battery; When the external power grid is not available, convert the three-phase alternating current generated by the generator into direct current through the first controllable rectifier, transmit it to the DC feeder unit through the DC bus, and charge the power battery.

[0009] Preferably, the hybrid cementing electric control system architecture, the DC / AC driver is an industrial-grade driver or a new energy vehicle-grade driver, which converts the direct current power of the DC bus into frequency-adjustable alternating current to drive the main drive motor and the auxiliary drive motor; The main drive motor is an industrial-grade motor or a new energy vehicle-grade motor, which is used to directly drive the cementing pump.

[0010] Preferably, the hybrid power cementing electric control system architecture, the DC / DC power supply converts the DC power supply of the DC bus into a DC 24V power supply to provide a DC power supply for the PLC control system.

[0011] Preferably, the hybrid power cementing electric control system architecture, the PLC control system receives control instructions issued by the EMS management system based on the DC bus voltage parameter and the load data of the DC / AC driver, controls the on-off of each power supply path in the power input module according to the instructions, and collects the on-off state signals of each power supply path in real time and feeds back to the EMS management system through the communication network.

[0012] The present application at least includes the following beneficial effects: 1. The engine, power battery and external power grid are combined into a DC microgrid, which can be independently powered or hybrid powered.

[0013] 2. The EMS management system coordinates and manages the power output of the engine, power battery and external power grid, so that the power battery is preferentially powered and the engine operates in the high efficiency zone, thereby improving the efficiency. 3. When the cementing truck / wagon is not working, the second controllable rectifier converts the three-phase alternating current of the external power grid into direct current to charge the power battery.

[0014] 4. When there is no external power grid, the first controllable rectifier can also convert the three-phase alternating current generated by the generator into direct current to charge the power battery.

[0015] 5. The engine, generator, first controllable rectifier, second controllable rectifier, power battery, DC feeder unit, AC feeder unit, DC bus, DC / AC driver, main drive motor, auxiliary drive motor, DC / DC power supply, PLC control system and EMS management system are integrated and designed with the cementing truck / wagon, the overall structure is compact and the integration degree is high.

[0016] Other advantages, objects and features of the present application will be partly embodied in the following description, and partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the hybrid power cementing electric control system architecture of the present application; Explanation of reference signs: 1, engine, 2, generator, 3, first controllable rectifier, 4, power battery, 5, DC feeder unit, 6, external power grid, 7, AC feeder unit, 8, second controllable rectifier, 9, DC bus, 10, DC / AC driver, 11, main drive motor, 12, auxiliary drive motor, 13, DC / DC power supply, 14, PLC control system, 15, EMS management system, 16, cementing truck / skid. DETAILED DESCRIPTION

[0018] The present application will be described in detail below with reference to the drawings. Those skilled in the art will be able to implement the present application based on these descriptions. Before the present application is described in detail with reference to the drawings, it is particularly important to note that the technical solutions and technical features provided in each part of the present application, including the following description, can be combined with each other without conflict.

[0019] In addition, the embodiments of the present application involved in the following description are generally only embodiments of a part of the present application, not all embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor should be within the scope of protection of the present application.

[0020] The present application will be described in detail below with reference to the drawings. Those skilled in the art will be able to implement the present application based on these descriptions. Before the present application is described in detail with reference to the drawings, it is particularly important to note that the technical solutions and technical features provided in each part of the present application, including the following description, can be combined with each other without conflict. As Figure 1 shown, the present application provides a hybrid power cementing electric control system architecture, comprising: a power input module comprising three parallel power supply paths, having an engine 1, a power battery 4, and an external power grid 6 combined into a DC microgrid, which can be independently powered or mixedly powered: a first power supply path, the engine 1 is connected to the generator 2, and the generator 2 is connected to the DC bus 9 through the first controllable rectifier 3; a second power supply path, the power battery 4 is connected to the DC bus 9 through the DC feeder unit 7; a third power supply path, the external power grid 6 is connected to the DC bus 9 in turn through the AC feeder unit 7 and the second controllable rectifier 8; a power output module comprising a plurality of DC / AC drivers 10 and DC / DC power supplies 13 powered by the DC bus 9, and a plurality of DC / AC drivers 10 driving a main drive motor 11 and a plurality of auxiliary drive motors 12 respectively; The control module includes a PLC control system 14 powered by a DC / DC power supply 13 and an EMS management system 15 in communication with the engine 1, the generator 2, the first controllable rectifier 3, the second controllable rectifier 8, the power battery 4, the DC / AC driver 10, and the PLC control system 14.

[0021] Further, the hybrid power cementing electric control system architecture has the engine 1, the generator 2, the first controllable rectifier 3, the power battery 4, the DC power feeding unit 5, the external power grid 6, the AC power feeding unit 7, the second controllable rectifier 8, the DC bus 9, the DC / AC driver 10, the main drive motor 11, the auxiliary drive motor 12, the DC / DC power supply 13, the PLC control system 14, and the EMS management system 15 all integrated on the cementing truck / skid 16, which has a compact overall structure and a high integration degree.

[0022] Further, the hybrid power cementing electric control system architecture has the three power supply paths in the power input module capable of independently supplying power to the power output module or supplying power to the power output module in a hybrid manner. When the hybrid power supply mode is adopted, the EMS management system 15 adjusts the power output proportion between the power supply paths in real time according to the actual cementing working conditions. Through the EMS management system 15, the engine 1, the power battery 4, and the external power grid 6 are coordinated and managed for power output, so that the power battery 4 is preferentially supplied with power and the engine 1 operates in the high-efficiency zone, thereby improving the efficiency.

[0023] Further, the hybrid power cementing electric control system architecture has the EMS management system 15 executing the following power supply control strategies when the hybrid power supply mode is adopted. The primary power supply stage: the first power supply path and the third power supply path are cut off, and only the second power supply path supplies power to the DC bus 9; The secondary power supply stage: according to the load data of the DC / AC driver 10, when the power supply capacity of the power battery 4 is exceeded, the first power supply path is started, the engine 1 is controlled to operate in the high-efficiency speed range, and the power battery 4 and the generator 2 jointly supply power; The tertiary power supply stage: according to the load data of the DC / AC driver 10, when the combined power supply capacity of the power battery 4 and the generator 2 is exceeded, the third power supply path is started, and the external power grid 6, the generator 2, and the power battery 4 jointly supply power.

[0024] Further, the hybrid power cementing electric control system architecture has the EMS management system 15 executing the following charging control strategies when the cementing truck / skid 16 stops working. When the external power grid 6 is available, the three-phase alternating current of the external power grid 6 is converted into direct current by the second controllable rectifier 8, transmitted to the direct current feeder unit 5 through the direct current bus 9, and charges the power battery 4; When the external power grid 6 is not available, the three-phase alternating current generated by the generator 2 is converted into direct current by the first controllable rectifier 3, transmitted to the direct current feeder unit 5 through the direct current bus 9, and charges the power battery 4.

[0025] Further, the hybrid power cementing electric control system architecture, the DC / AC driver 10 is an industrial grade driver or a new energy vehicle level driver, converts the direct current power supply of the direct current bus 9 into frequency adjustable alternating current to drive the main drive motor 11 and the auxiliary drive motor 12, and the degree of electrification is high. The main drive motor 11 is an industrial motor or a new energy vehicle level motor, which is used to directly drive the cementing pump and improve the equipment efficiency. The auxiliary drive motor 12 can be used to provide power for the auxiliary system and equipment in the cementing operation.

[0026] Further, the hybrid power cementing electric control system architecture, the DC / DC power supply 13 converts the direct current power supply of the direct current bus 9 into DC 24V power supply to provide direct current for the PLC control system 14.

[0027] Further, the hybrid power cementing electric control system architecture, the PLC control system 14 receives the control instructions issued by the EMS management system 15 based on the voltage parameters of the direct current bus 9 and the load data of the DC / AC driver 10, controls the on-off of each power supply path in the power input module according to the instructions, the PLC control system 14 collects the on-off state signals of each power supply path in real time, and feeds back to the EMS management system 15 through the communication network, so as to ensure that the power supply meets the load requirements of the cementing pump and is stable output, and the degree of automation is high.

[0028] Although the embodiments of the present application have been disclosed as above, they are not limited to the applications listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore, the present application is not limited to specific details and the embodiments shown and described herein, without departing from the general concept defined by the claims and equivalent scope.

Claims

1. A hybrid power cementing electrical control system architecture, characterized in that, include: The power input module includes three parallel power supply paths: The first power supply path connects the engine to the generator, which is connected to the DC bus via a first controllable rectifier. The second power supply path involves connecting the power battery to the DC bus via a DC feeder unit. The third power supply path is that the external power grid is connected to the DC bus in sequence through the AC power supply unit and the second controllable rectifier; The power output module includes multiple DC / AC drivers and a DC / DC power supply powered by a DC bus, wherein the multiple DC / AC drivers drive a main drive motor and multiple auxiliary drive motors respectively; The control module includes a PLC control system and an EMS management system. The PLC control system is powered by a DC / DC power supply, and the EMS management system is communicatively connected to the engine, generator, first controllable rectifier, second controllable rectifier, power battery, DC / AC driver, and PLC control system.

2. The hybrid power cementing electrical control system architecture as described in claim 1, characterized in that, The engine, generator, first controllable rectifier, power battery, DC power supply unit, external power grid, AC power supply unit, second controllable rectifier, DC bus, DC / AC driver, main drive motor, auxiliary drive motor, DC / DC power supply, PLC control system and EMS management system are all integrated and installed on the cementing truck / skid.

3. The hybrid power cementing electrical control system architecture as described in claim 1, characterized in that, The three power supply paths in the power input module can supply power to the power output module independently or in a hybrid power supply manner. When a hybrid power supply method is used, the power output ratio between each power supply path is adjusted in real time by the EMS management system according to the actual cementing conditions.

4. The hybrid power cementing electrical control system architecture as described in claim 3, characterized in that, When a hybrid power supply method is used, the EMS management system executes the following power supply control strategy: Primary power supply stage: The first and third power supply paths are disconnected, and power is supplied to the DC bus only through the second power supply path; Secondary power supply stage: Based on the load data of the DC / AC drive, when the power supply capacity of the power battery is exceeded, the first power supply path is activated, the engine is controlled to run in the high-efficiency speed range, and the generator and power battery work together to supply power. Level 3 power supply stage: Based on the load data of the DC / AC drive, when the combined power supply capacity of the power battery and generator is exceeded, the third power supply path is activated, and power is supplied through the external power grid, generator and power battery.

5. The hybrid power cementing electrical control system architecture as described in claim 1, characterized in that, When the cementing truck / skid stops operating, the EMS management system executes the following charging control strategy: When the external power grid is available, the three-phase AC power from the external power grid is converted into DC power through the second controllable rectifier, and then transmitted to the DC power supply unit via the DC bus to charge the power battery. When the external power grid is unavailable, the three-phase AC power generated by the generator is converted into DC power through the first controllable rectifier and transmitted to the DC power supply unit via the DC bus to charge the power battery.

6. The hybrid power cementing electrical control system architecture as described in claim 1, characterized in that, The DC / AC driver is an industrial-grade driver or a new energy vehicle-grade driver, which converts the DC power supply of the DC bus into frequency-adjustable AC power to drive the main drive motor and the auxiliary drive motor. The main drive motor is an industrial-grade motor or a new energy vehicle-grade motor, used to directly drive the cementing pump.

7. The hybrid power cementing electrical control system architecture as described in claim 1, characterized in that, The DC / DC power supply converts the DC power from the DC bus into a DC 24V power supply to provide DC power to the PLC control system.

8. The hybrid power cementing electrical control system architecture as described in claim 1, characterized in that, The PLC control system receives control commands from the EMS management system based on DC bus voltage parameters and load data from the DC / AC driver. According to the commands, it controls the on / off state of each power supply path in the power input module. The PLC control system collects the on / off status signals of each power supply path in real time and feeds them back to the EMS management system through the communication network.

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