Hybrid power well cementation control method

Abstract

The invention discloses a hybrid power well cementation control method which comprises the following steps: detecting working states of each power input end, a direct current bus and each load driving end through an EMS management system, and adjusting an electric energy control strategy of a hybrid power well cementation electric control system according to the working states, including a power battery priority control strategy; according to the hybrid power supply control strategy, when the total load data of each load driving end exceeds the discharge capacity of the power battery, a hybrid power supply mode is selected according to the magnitude of the discharge capacity exceeding the load data; according to the charging control strategy, a generator or an external power grid is controlled to charge the power battery. The optimal control method is designed on the basis of a hardware platform of a hybrid power well cementation electric control system with three power supply inputs of a generator, a power battery and an external power grid, so that the three power supplies can better coordinate to work, the working efficiency and the stability under a multi-power-source driving architecture are improved, and the requirements of energy conservation and environmental protection are met.

Description

TECHNICAL FIELD

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

[0002] In cementing operation, mechanical transmission or electric drive is generally used to drive the cementing equipment to work. The mechanical transmission generally drives the cementing pump to work through a diesel engine after speed reduction through a gearbox, but due to low fuel efficiency of the engine and low mechanical efficiency after transmission through the gearbox, the output power of the diesel engine is wasted seriously, so a larger power engine has to be configured, which has problems of low energy utilization efficiency and high cost. The electric drive generally provides power for the operation of the cementing equipment by connecting to the drilling site power grid, but the motor of the electrically driven cementing equipment has large power and large output current, which has problems of high labor intensity of workers in the mode of pure power grid power supply, such as wire laying, wire winding, wire connection and wire disconnection, and low overall work efficiency of the cementing operation, and is easily affected by external environment such as power grid fluctuation, so the operation stability of the cementing equipment is insufficient.

[0003] In view of the above problems, the technical personnel consider designing a hybrid power driving system with multiple power sources, but the switching and control between different power sources are difficult in actual application. Under the condition that the hardware platform has been built, how to design a more optimal control method to make the multiple power sources work better is a problem to be solved by the present application. SUMMARY

[0004] The purpose of the present application is to provide a hybrid power cementing control method, which designs an optimal control method on the basis of the hardware platform of a hybrid power cementing electric control system with three power sources of generator, power battery and external power grid, so that the three power sources can work better, the work efficiency and stability under the driving architecture of multiple power sources are improved, and the energy saving and environmental protection requirements are met.

[0005] In order to achieve these objects and other advantages according to the present application, a hybrid power cementing control method is provided, which is controlled based on a hybrid power cementing electric control system, the hybrid power cementing electric control system collects electric energy of each power input end in a direct current bus and distributes it to each load driving end, each power input end is correspondingly provided with a power source, which respectively includes a power battery, a generator and an external power grid, and each load driving end is correspondingly provided with a load; the hybrid power cementing control method includes detecting the working states of each power input end, the direct current bus and each load driving end through an EMS management system, and adjusting the electric energy control strategy of the hybrid power cementing electric control system based thereon, which includes: The power battery priority control strategy comprises: when no voltage is detected at the DC bus, the power battery is preferentially controlled to output DC power and establish voltage on the DC bus. The hybrid power supply control strategy comprises: when the total load data of each load driving end exceeds the discharge capacity of the power battery, a hybrid power supply mode of the generator and the power battery is selected according to the size of the load data exceeding the discharge capacity, or a hybrid power supply mode of the generator, the power battery and the external power grid is selected. The charging control strategy comprises: when it is detected that each load is in an inoperative state and the remaining power of the power battery is lower than a set charging control threshold, the generator or the external power grid is controlled to charge the power battery.

[0006] Preferably, in the hybrid power cementing control method, when the hybrid power supply control strategy is adopted, a voltage following control strategy is simultaneously performed, which comprises: controlling each AC power input end currently in an operative state to perform voltage following on the DC bus and dynamically supplement current according to real-time load data.

[0007] Preferably, in the hybrid power cementing control method, in the hybrid power supply control strategy, when the load data does not exceed the common power supply capacity of the power battery and the generator, the hybrid power supply mode of the generator and the power battery is selected; when the load data exceeds the common power supply capacity of the power battery and the generator, the hybrid power supply mode of the generator, the power battery and the external power grid is selected.

[0008] Preferably, in the hybrid power cementing control method, in the charging control strategy, after it is detected that each load is in an inoperative state and the remaining power of the power battery is lower than a set charging control threshold, an external power grid signal is further detected, when the external power grid signal exists, the power supply of the external power grid is preferentially turned on to charge the power battery; when no external power grid signal is detected, the generator is controlled to charge the power battery.

[0009] Preferably, in the hybrid power cementing control method, in the charging control strategy, the charging control threshold is 20% of the total power of the power battery.

[0010] Preferably, in the hybrid power cementing control method, DC feeding units and AC feeding units are respectively arranged in the power input ends corresponding to the power battery and the external power grid, rectifiers are arranged in the power input ends corresponding to the generator and the external power grid, a control module of the hybrid power cementing electric control system is electrically connected with each power source, each load, each feeding unit and each rectifier, and an EMS management system is electrically connected with the control module, each power source, each load driving end, each rectifier and the DC bus.

[0011] The present application at least comprises the following beneficial effects: 1、The EMS management system detects the working state of different nodes of the hybrid power cementing electric control system, and adjusts the electric energy control strategy of the hybrid power cementing electric control system based on the same, coordinates and manages the electric energy output of the engine, the power battery and the external power grid, preferentially provides electric energy by the power battery, and selects the power supply of the generator and the external power grid to be connected according to the real-time load condition of the load end to perform hybrid power supply, thereby effectively optimizing the power supply control strategy under the multi-power source driving architecture, enabling the three power sources to work better in coordination, ensuring the power supply stability and the working efficiency of the cementing equipment, greatly improving the energy utilization efficiency, and being beneficial to meeting the energy saving and environmental protection requirements. 2、The voltage following control strategy is executed in the hybrid power supply mode, the generator and the external power grid dynamically supplement the current according to the real-time load size, and the engine is enabled to work in the high efficiency zone during operation, and the system working efficiency and stability are further improved. 3、When the remaining power of the power battery is insufficient, the power battery charging function can be realized by controlling the generator or connecting the external power grid, and the problems of time delay and the like caused by insufficient power of the power battery during the operation time are avoided.

[0012] Other advantages, objects and features of the present application will be partly embodied by the following description, and will be partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 A framework structure diagram of a hybrid power cementing electric control system of an embodiment of the present application; Fig. 2 A schematic diagram of the power battery preferential control strategy executed in the above embodiment; Fig. 3 A schematic diagram of the generator and power battery hybrid power supply control strategy executed in the above embodiment; Fig. 4 A schematic diagram of the generator, power battery and external power grid hybrid power supply control strategy executed in the above embodiment; Fig. 5 A schematic diagram of the generator charging control strategy executed in the above embodiment; Fig. 6 A schematic diagram of the external power grid charging control strategy executed in the above embodiment.

[0014] Explanation of reference signs: 1. Engine; 2. Generator; 3. First rectifier; 4. Power battery; 5. DC feeder unit; 6. External power grid; 7. AC feeder unit; 8. Second rectifier; 9. DC bus; 10. First DC / AC driver; 11. Second DC / AC driver; 12. Third DC / AC driver; 13. Fourth DC / AC driver; 14. Main drive motor; 15. First auxiliary drive motor; 16. Second auxiliary drive motor; 17. Third auxiliary drive motor; 18. DC / DC power supply; 19. PLC controller; 20. EMS management system; 21. Cementing skid. DETAILED DESCRIPTION

[0015] The application will be further described in details below with reference to the drawings, so that those skilled in the art can implement the application according to the description and the drawings.

[0016] It should be noted that, in the following embodiments, the experimental methods are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the application, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0017] As shown in Figs. 1-6 The application provides a hybrid power cementing control method, which is controlled based on a hybrid power cementing electric control system, the hybrid power cementing electric control system collects electric energy of each power input end in a DC bus 9 and distributes the electric energy to each load driving end, a power source is correspondingly arranged in each power input end, which respectively includes a power battery 4, a generator 2 and an external power grid 6, and a load is correspondingly arranged in each load driving end; the hybrid power cementing control method includes detecting working states of the each power input end, the DC bus and the each load driving end by an EMS management system 20, and adjusting an electric energy control strategy of the hybrid power cementing electric control system based on the working states, which includes: a power battery priority control strategy, which includes: when no voltage is detected at the DC bus, preferentially controlling the power battery to output DC electric energy and establishing voltage on the DC bus; a hybrid power supply control strategy, which includes: when total load data of each load driving end exceeds discharge capacity of the power battery, selecting a generator and power battery hybrid power supply mode or a generator, power battery and external power grid hybrid power supply mode according to the size of the load data exceeding the discharge capacity; The charging control strategy comprises: when it is detected that each load is in an inoperative state and the remaining power of the power battery is lower than a set charging control threshold, controlling the generator or the external power grid to charge the power battery.

[0018] In the technical solution, the hybrid power cementing electric control system has three power sources (power supplies), the power battery, the generator and the external power grid, which supply power to each load through the corresponding power input end via a DC bus. The power input ends are connected in parallel on one side of the DC bus, and the load driving ends are connected in parallel on the other side of the DC bus. The power battery, as the most stable, efficient and environmentally friendly power source, can independently provide power for the operation of the cementing pump. Therefore, in the power control strategy, when the load size at the load end does not exceed the power supply capacity of the power battery, the power input end where the power battery is located is preferentially selected for independent power supply; as the load gradually increases and exceeds the power supply capacity of the power battery, the power input ends where the generator and the external power grid are located can be sequentially connected, so that they are mixed with the power battery to supply power, to meet the current load demand. At this time, the EMS management system adjusts and controls the power output of the generator, the power battery and the external power grid according to real-time load data. When the generator and the power battery are selected for mixed power supply, the generator and power battery mixed power supply control strategy is executed; when the generator, the power battery and the external power grid are selected for mixed power supply, the generator, the power battery and the external power grid mixed power supply control strategy is executed. In addition, when it is detected that the remaining power of the power battery is lower than the set charging control threshold, the power battery can be charged by the generator or the external power grid during the period when each load is in an inoperative state (the cementing equipment is stopped). When the generator is selected to charge the power battery, the generator charging control strategy is executed; when the external power grid is selected to charge the power battery, the external power grid charging control strategy is executed. Thus, the power battery can be fully charged during non-working time, avoiding problems such as delay of construction period caused by insufficient power of the power battery during normal operation time. The above charging process does not require additional wiring, and the automatic switching of the charging mode can be realized directly by using the original hybrid power cementing electric control system architecture, improving the intelligent and automatic control degree of the hybrid power system.

[0019] In another technical solution, the mixed power cementing control method, when the mixed power supply control strategy is adopted, a voltage following control strategy is simultaneously executed, which comprises: controlling the voltage following of the direct current bus by the AC power input terminals currently in working state, and dynamically supplementing the current according to real-time load data. Wherein, the generator and the external power grid supply AC power, and the corresponding two power input terminals are AC power input terminals. When the generator and power battery mixed power supply control strategy is executed, on the basis of maintaining the power supply of the power input terminal where the power battery is located, the engine is automatically started to drive the generator to generate power, and the voltage following of the power input terminal where the generator is located is controlled according to the direct current bus voltage. At this time, the power input terminal where the generator is located only outputs current, which is used to supplement the bus energy to meet the load demand of the cementing equipment. When the generator, power battery and external power grid mixed power supply control strategy is executed, on the basis of maintaining the power supply of the power input terminal where the power battery is located, the engine is automatically started to drive the generator to generate power and the power input terminal where the external power grid is located is connected, and the voltage following of the power input terminals where the generator and the external power grid are located is controlled according to the direct current bus voltage. At this time, the power input terminals where the generator and the external power grid are located only output current, which is used to supplement the bus energy to meet the load demand of the cementing equipment.

[0020] The voltage following control strategy makes the AC power input terminal not actively set / control the direct current bus voltage, but takes the actual voltage at the direct current bus as a reference signal, adaptively outputs current according to the real-time load size (load data) to share the power demand of the load end, which has fast response speed and is beneficial to reduce the complexity of the control strategy in the mixed power supply mode, while maintaining the stability of the bus voltage and realizing efficient dynamic balance of energy.

[0021] In another technical solution, the mixed power cementing control method, in the mixed power supply control strategy (assuming that the current load data has exceeded the power supply capacity of the power battery), when the load data does not exceed the common power supply capacity of the power battery and the generator, the generator and power battery mixed power supply mode is selected; when the load data exceeds the common power supply capacity of the power battery and the generator, the generator, power battery and external power grid mixed power supply mode is selected. Specifically, when evaluating whether the load data exceeds the common power supply capacity of the power source currently in working state, the relative size of the real-time total load power and the (rated) output power of the power source can be mainly used for judgment, and the relative size of the total load current and the (rated) output current of the power source can also be used for auxiliary judgment.

[0022] In another technical solution, the mixed power cementing control method, in the charging control strategy, after detecting that each load is in the non-working state and the residual power of the power battery is lower than the set charging control threshold, the external power grid signal is further detected, when the external power grid signal exists, the power supply of the external power grid is connected to charge the power battery; when the external power grid signal is not detected, the generator is controlled to charge the power battery.

[0023] Specifically, in the charging control strategy, the charging needs to be performed when each load is not in the working state (the cementing equipment is stopped), and when the external power grid signal can be detected, the external power grid charging control strategy is preferentially adopted to connect the power supply of the external power grid to charge the power battery. Here, detecting the external power grid signal includes detecting whether the external power grid is in the power-on state and whether the grid voltage (amplitude, frequency, stability, etc.) meets the standard, so as to avoid problems such as power-off of the external power grid after being connected, voltage parameters not meeting the power supply requirements, and the like, which affect the normal work of the mixed power system. When there is no power grid, such as when the external power grid is in the power-off state or the voltage parameters do not meet the standard, the generator charging control strategy can also be executed to charge the power battery.

[0024] In another technical solution, the mixed power cementing control method, in the charging control strategy, the charging control threshold is 20% of the total power of the power battery.

[0025] In another technical solution, the mixed power cementing control method, the power input end corresponding to the power battery and the external power grid is respectively provided with a direct-current feeding unit and an alternating-current feeding unit, the power input end corresponding to the generator and the external power grid is provided with a rectifier, the control module of the mixed power cementing electric control system is electrically connected with each power source, each load, each feeding unit, and each rectifier, and the EMS management system is electrically connected with the control module, each power source, each load driving end, each rectifier, and the direct-current bus.

[0026] In the above technical solution, the generator is driven by an engine to generate electricity. Controlling the engine's start and stop controls the power supply to the corresponding power input terminal. Each power input terminal, including the power battery and the external power grid, has a feeder unit to control the connection between the corresponding power input terminal and the DC bus. The power output from the generator and the external power grid needs to be converted to DC by rectifiers before supplying power to the DC bus / power battery. A PLC controller can be used as the control module. The EMS management system is a software system mounted on the control host. The PLC controller can be integrated into the control host to achieve bidirectional information transmission between the control module and the EMS management system. The connection between the control module and each power source, load, feeder unit, and rectifier is for transmitting control commands to each device. The connection between the EMS management system and each power source, load drive terminal, rectifier, and DC bus is a unidirectional detection signal line. Detection devices (voltage sensors, isolation amplifiers, or built-in integrated voltage monitoring ICs, etc.) can be set at the device under test. Each detection device is connected to the control host through a signal line, and the detected voltage, current, and other signals are transmitted to the EMS management system for integration, analysis, and processing. After the analysis yields the corresponding control strategy, the control module sends control commands to the corresponding devices to achieve regulation of the overall system's operating status.

[0027] Example 1 This will be illustrated using a specific application of a hybrid power cementing electrical control system as an example, such as... Figs. 1-6 As shown, the electronic control system includes: engine 1, generator 2, first rectifier 3, power battery 4, DC power supply unit 5, external power grid 6, AC power supply unit 7, second rectifier 8, DC bus 9, four DC / AC drivers 10-13, main drive motor 14, three auxiliary drive motors 15-17, DC / DC power supply 18, PLC controller 19, and EMS management system 20. The entire electronic control system is installed inside the cementing skid 21.

[0028] The direct current bus is connected to the input side and the output side of the electric control system respectively, and three power sources exist in the input side: the generator, the power battery and the external power grid. The power input path corresponding to each power source is the power input end. The engine 1 and the first rectifier 3 are arranged at the power input end where the generator 2 is located. The engine 1 is used to drive the generator 2 to operate for power supply, and the first rectifier 3 is used to convert the alternating current from the generator 2 into direct current and then transmit the direct current to the direct current bus 9. The direct current feeding unit 5 is arranged at the power input end where the power battery 4 is located. The direct current feeding unit 5 is used to protect and control the electric energy from the power battery 4 and supply power for the direct current bus 9. The alternating current feeding unit 7 and the second rectifier 8 are arranged at the power input end where the external power grid 6 is located. The alternating current feeding unit 7 is used to protect and control the electric energy from the external power grid 6, and the second rectifier 8 is used to convert the three-phase alternating current processed by the alternating current feeding unit 7 into direct current and then transmit the direct current to the direct current bus 9. The direct current feeding unit and the alternating current feeding unit are selected from conventional feeding unit structures and mainly include feeding switches and the like. The output side is provided with four loads: one main drive motor 14 and three auxiliary drive motors (a first auxiliary drive motor 15, a second auxiliary drive motor 16 and a third auxiliary drive motor 17). Each motor is used to drive the cementing equipment to work. The output circuit corresponding to each load is the load driving end. Each load driving end is provided with a DC / AC driver (a first DC / AC driver 10, a second DC / AC driver 11, a third DC / AC driver 12 and a fourth DC / AC driver 13). The DC / AC driver is used to convert the direct current power of the direct current bus 9 into frequency-adjustable alternating current and supply power for each load (motor). The output side is further provided with a PLC controller 19 which is electrically connected to the direct current bus 9 through a DC / DC power supply 18. The DC / DC power supply 18 converts the high-voltage direct current of the direct current bus 9 into 24V direct current power to supply power for the PLC controller 19. The PLC controller is provided with a control circuit (not shown in the figure) between the PLC controller and each device of the electric control system, so as to accurately control the working state of each device and obtain the working data of each device.

[0029] In the embodiment, the EMS management system 20 monitors the working states of the input-side engine 1, the generator 2, the power battery 4, the external power grid 6, two rectifiers, the DC bus 9, and the output-side loads. The EMS management system and the PLC controller are connected in a bidirectional data transmission mode, that is, the EMS management system can obtain the working state information of each device through the PLC controller, and can send corresponding signals to the PLC control system after integrating data and analyzing specific control strategies, and the PLC control system sends control signals to each device to execute the set control strategies. In the figure, the EMS management system 20 is connected with the AC power feeding unit 7 to detect the external power grid signal, and the EMS management system 20 is connected with the DC / AC driver in each load driving end to detect the working state of the load and the load data through the working state.

[0030] The hybrid cementing control method is controlled based on the hybrid cementing electric control system, and drives the cementing equipment (cementing pump) to work through the following control strategies: Power battery priority control strategy: the EMS management system 20 detects whether the DC bus 9 has voltage, if not, the DC power feeding unit 5 is connected preferentially to enable the power battery 4 to establish voltage on the DC bus 9, and at this time, each DC / AC driver obtains DC power to drive the main drive motor 14 and each auxiliary drive motor 15-17 to run, respectively. Hybrid power supply control strategy + voltage follow-up control strategy: S1, the EMS management system 20 detects whether the DC bus 9 has voltage, if yes, further detects the total load data at the four DC / AC drivers 10-13, when the total load data exceeds the discharge capacity of the power battery 4, the engine 1 drives the generator 2 to generate power, and the first rectifier 3 is controlled according to the DC bus voltage to follow up the voltage and dynamically supplement the current according to the load size, that is, the hybrid power supply control strategy of the generator and the power battery; S2, the total load data at the four DC / AC drivers is continuously detected, when the total load data exceeds the combined power supply capacity of the power battery 4 and the generator 2, the power supply of the power battery and the generator is maintained, the AC power feeding unit 7 is controlled to automatically connect the power supply of the external power grid 6, and the second rectifier 8 is controlled according to the DC bus voltage to follow up the voltage and dynamically supplement the current according to the load size, that is, the hybrid power supply control strategy of the generator, the power battery, and the external power grid; Generator charging control strategy: when the EMS management system 20 detects that the power battery 4 is in an online state, the main drive motor 14 and the auxiliary drive motors 15-17 are in a shutdown state, the remaining power of the power battery 4 is less than 20% of the total power, and there is no external power grid 6 signal, the engine 1 drives the generator 2 to generate power, and the first rectifier 3 is controlled to charge the power battery 4; External power grid charging control strategy: when the EMS management system 20 detects that the power battery 4 is in an online state, the main drive motor 14 and the auxiliary drive motors 15-17 are in a shutdown state, the remaining power of the power battery is less than 20% of the total power, and there is a signal of the external power grid 6, the control system controls the AC power supply unit 7 to automatically connect the power supply of the external power grid 6, and controls the second rectifier 8 to charge the power battery 4.

[0031] The hybrid power cementing control method optimizes the control strategy, so that the power battery and the generator can independently provide electric energy for the cementing pump operation, and the engine, the power battery and the external power grid are coordinately managed, the power battery is preferentially powered, the energy utilization efficiency is improved, and the power battery is automatically charged when the engine is stopped. Thus, the automation and intelligent control level under the hybrid power driving system architecture is greatly improved, which is beneficial to realize the green construction target, and has a good application prospect.

[0032] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A hybrid power cementing control method, characterized in that, The control is based on a hybrid power cementing electrical control system, which collects electrical energy from each power input terminal via a DC bus and distributes it to each load drive terminal. Each power input terminal is equipped with a power source, including a power battery, a generator, and an external power grid. Each load drive terminal is equipped with a corresponding load. The hybrid power cementing control method includes detecting the operating status of each power input terminal, the DC bus, and each load drive terminal through an EMS management system, and adjusting the power control strategy of the hybrid power cementing electrical control system based on this status. A power battery priority control strategy includes: when no voltage is detected at the DC bus, prioritizing the power battery to output DC power and establish voltage on the DC bus; The hybrid power supply control strategy includes: when the total load data of each load drive end exceeds the discharge capacity of the power battery, selecting a hybrid power supply mode of generator and power battery, or a hybrid power supply mode of generator, power battery and external power grid, according to the magnitude of the load data exceeding the discharge capacity. The charging control strategy includes: when it is detected that all loads are in an inactive state and the remaining charge of the power battery is lower than a set charging control threshold, controlling the generator or the external power grid to charge the power battery.

2. The hybrid cementing control method as described in claim 1, characterized in that, When the hybrid power supply control strategy is adopted, a voltage following control strategy is also executed, which includes: controlling each AC power input terminal currently in operation to follow the DC bus voltage and dynamically supplementing current according to real-time load data.

3. The hybrid cementing control method as described in claim 1, characterized in that, In the hybrid power supply control strategy, when the load data does not exceed the combined power supply capacity of the power battery and the generator, a hybrid power supply mode of generator and power battery is selected; when the load data exceeds the combined power supply capacity of the power battery and the generator, a hybrid power supply mode of generator, power battery and external power grid is selected.

4. The hybrid cementing control method as described in claim 1, characterized in that, In the charging control strategy, after detecting that all loads are in an inactive state and the remaining power of the power battery is lower than the set charging control threshold, the external power grid signal is further detected. When the external power grid signal is present, the power of the external power grid is connected first to charge the power battery; when the external power grid signal is not detected, the generator is controlled to charge the power battery.

5. The hybrid cementing control method as described in claim 1, characterized in that, In the charging control strategy, the charging control threshold is 20% of the total capacity of the power battery.

6. The hybrid cementing control method as described in claim 1, characterized in that, The power battery and the power input terminal corresponding to the external power grid are respectively equipped with a DC power supply unit and an AC power supply unit. The generator and the power input terminal corresponding to the external power grid are each equipped with a rectifier. The control module of the hybrid cementing electrical control system is electrically connected to each power source, each load, each power supply unit, and each rectifier. The EMS management system is electrically connected to the control module, each power source, each load drive terminal, each rectifier, and the DC bus.

Images