AC / DC energy consumption device coordination device and power control method thereof

Abstract

The present invention discloses an AC / DC energy consumption device coordination and cooperation device and a power control method thereof, the method comprising: real-time monitoring of the DC line voltage in the AC / DC energy consumption device coordination and cooperation system; when it is detected that a fault occurs in the receiving end system connected to the onshore converter station, the AC bus voltage decreases and the DC line voltage increases, and the surplus power required to be consumed by the AC energy consumption device and the DC energy consumption device is calculated; when it is detected that the DC line voltage in the AC / DC energy consumption device coordination and cooperation system is greater than a voltage threshold and the surplus power is less than a power threshold, the DC energy consumption device is put into use; when it is detected that the DC line voltage in the AC / DC energy consumption device coordination and cooperation system is greater than a voltage threshold and the surplus power is greater than a power threshold, the AC energy consumption device and the DC energy consumption device are put into use simultaneously. The method can cope with the DC overvoltage problem caused by AC system faults in offshore converter stations and onshore converter stations, and can quickly absorb the surplus power.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and in particular to an AC / DC energy consumption device coordination device and a power control method thereof. Background Art

[0002] Compared to onshore wind power, offshore wind power offers unique advantages, including stable wind energy resources, no land occupation, and favorable absorption conditions. China's offshore wind energy resources are extremely abundant, and the conditions for developing offshore wind power are relatively favorable. Developing China's offshore wind power industry is a top priority. At the same time, factors such as supply chain capacity, grid connection method, and low-voltage ride-through capability directly influence the scale and speed of offshore wind power development. Currently, offshore wind power grid connection methods are primarily divided into two categories: high-voltage AC transmission and high-voltage DC transmission. High-voltage DC transmission utilizes flexible DC transmission technology based on voltage source converters. Flexible DC transmission technology effectively isolates the wind farm's internal AC system from the external large power grid, minimizing the negative impact of offshore wind power's high randomness, high intermittency, and high volatility on the main grid, greatly improving the safety and stability of offshore wind power grid connection.

[0003] After an onshore AC fault occurs, the active power delivery capacity of the onshore converter station of the flexible DC system decreases. Because the offshore wind farm cannot fully deliver its power, a large amount of surplus power appears in the DC system, causing the converter station submodule voltage and inter-electrode DC voltage to rise rapidly. This can trigger overvoltage protection in just a few milliseconds, causing the system to shut down. Existing control strategies include using energy-dissipating resistors, operating wind turbines at reduced power, or using the flexible DC transmission system's rapid regulation capabilities to adjust the AC bus voltage amplitude at the offshore sending-end converter station. However, single control strategies often have limited capabilities. For example, while using energy-dissipating resistors can effectively dissipate excess power, they have high resistance requirements, making them uneconomical. The need for fast response speed also increases the investment cost of energy-dissipating resistors. Operating wind turbines at reduced power can also achieve some power balance, but the response speed is too slow. Using the flexible DC system to control AC voltage has a fast response speed, but it essentially exploits the low voltage ride-through capability of offshore wind turbines. It is not very effective for severe faults and can easily cause wind turbines to disconnect from the grid. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the present invention proposes a coordination and cooperation device for AC and DC energy consumption devices, which can cope with the DC overvoltage problem caused by AC system failures in offshore converter stations and onshore converter stations, and can quickly absorb surplus power. In particular, for bipolar flexible DC transmission systems, when a monopolar line fails and needs to exit operation, the energy consumption device can quickly absorb excess power and maintain normal and stable transmission of active power.

[0006] The second aspect of the present invention is to propose a power control method based on an AC / DC energy consumption device coordination device.

[0007] A third aspect of the present invention provides a computer device.

[0008] A fourth aspect of the present invention provides a storage medium.

[0009] To achieve the above objectives, the present invention provides, in one aspect, a coordinated device for AC and DC energy consuming devices, comprising:

[0010] A voltage monitoring module for real-time monitoring of the DC line voltage in the AC / DC energy consumption device coordination system; wherein the AC / DC energy consumption device coordination system includes a wind farm, AC energy consumption devices, an offshore converter station, a DC energy consumption device, a receiving system, and an onshore converter station;

[0011] a surplus power calculation module, configured to calculate the surplus power required to be consumed by the AC energy consumption device and the DC energy consumption device when it is detected that a fault occurs in the receiving system connected to the onshore converter station, resulting in a decrease in the AC bus voltage and an increase in the DC line voltage;

[0012] The first energy consumption device application module is configured to put the DC energy consumption device into use when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than a voltage threshold and the surplus power is less than a power threshold;

[0013] The second energy consumption device application module is used to put the AC energy consumption device and the DC energy consumption device into use simultaneously when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is greater than the power threshold.

[0014] In addition, the AC / DC energy consumption device coordination device according to the above embodiment of the present invention may also have the following additional technical features:

[0015] Furthermore, in one embodiment of the present invention, the DC line voltage is Ud, the voltage threshold is 1.1Ud, and the power threshold is 0.5P N .

[0016] Furthermore, in one embodiment of the present invention, the energy consumption capacity of any one of the AC energy consumption device and the DC energy consumption device adopts 0.5P N Configuration, where P N The total active power output by the wind farm in the system is coordinated with the AC and DC energy consumption devices.

[0017] Furthermore, in one embodiment of the present invention, the device further includes a surplus power absorption module, configured to:

[0018] When the flexible DC power transmission system in the AC / DC energy consumption device coordination system is in a bipolar connection form and a unipolar line fault is detected, the AC energy consumption device is quickly put into use, the flexible DC power transmission system is switched to a unipolar operation mode, and the active power of the AC / DC energy consumption device coordination system is 0.5PN;

[0019] When an AC system failure occurs in the offshore converter station, the DC side voltage of the wind turbine converter in the wind farm is detected to rise to a threshold voltage, and the AC energy consumption device is quickly put into use to absorb surplus power.

[0020] To achieve the above-mentioned object, the present invention further proposes a power control method based on an AC / DC energy consumption device coordination device, comprising:

[0021] Real-time monitoring of DC line voltage in the coordination system of AC and DC energy consuming devices;

[0022] When it is detected that a fault occurs in the receiving system connected to the onshore converter station, the AC bus voltage decreases and the DC line voltage increases, and the surplus power required to be consumed by the AC energy consumption device and the DC energy consumption device is calculated;

[0023] When it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is less than the power threshold, the DC energy consumption device is put into use;

[0024] When it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is greater than the power threshold, the AC energy consumption device and the DC energy consumption device are put into use simultaneously.

[0025] A third aspect of the present invention provides a computer device comprising a processor and a memory; wherein the processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the power control method.

[0026] A fourth aspect of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the power control method as described above when executed by a processor.

[0027] The AC / DC energy consumption device coordination device, power control method, computer equipment and storage medium of the embodiment of the present invention can deal with the DC overvoltage problem caused by AC system failure in offshore converter stations and onshore converter stations, and can quickly absorb surplus power. In particular, for a bipolar flexible direct current transmission system, when a single-pole line fails and needs to be shut down, the energy consumption device can quickly absorb the excess power and maintain normal and stable transmission of active power.N The capacity requirements are greatly reduced, and the requirements for device tolerance and investment costs are greatly reduced.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0030] Figure 1 Schematic diagram of the structure of the AC / DC energy consumption device coordination device according to an embodiment of the present invention;

[0031] Figure 2 A structural diagram of a coordination system for AC and DC energy consuming devices according to an embodiment of the present invention;

[0032] Figure 3 Flowchart of a power control method based on an AC / DC energy consumption device coordination device according to an embodiment of the present invention;

[0033] Figure 4 A computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0036] The following describes an AC / DC energy consumption device coordination device, a power control method, a computer device, and a storage medium according to embodiments of the present invention with reference to the accompanying drawings.

[0037] Figure 1 It is a structural diagram of the AC / DC energy consumption device coordination device according to an embodiment of the present invention.

[0038] like Figure 1As shown, the AC / DC energy consumption device coordination device 10 includes a voltage detection module 100, a surplus power calculation module 200, a first energy consumption device application module 300 and a second energy consumption device application module 400.

[0039] The voltage detection module 100 is used to monitor the DC line voltage in the AC / DC energy consumption device coordination system in real time; wherein the AC / DC energy consumption device coordination system includes AC energy consumption devices, offshore converter stations, DC energy consumption devices, receiving end systems, and onshore converter stations;

[0040] The surplus power calculation module 200 is used to calculate the surplus power that needs to be consumed by the AC energy consumption device and the DC energy consumption device when it is detected that a fault occurs in the receiving system connected to the onshore converter station, resulting in a decrease in the AC bus voltage and an increase in the DC line voltage;

[0041] The first energy consumption device application module 300 is configured to put the DC energy consumption device into use when it is detected that the DC line voltage in the AC / DC energy consumption device coordination system is greater than a voltage threshold and the surplus power is less than a power threshold;

[0042] The second energy consumption device application module 400 is used to simultaneously put the AC energy consumption device and the DC energy consumption device into use when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is greater than the power threshold.

[0043] Furthermore, the device 10 further includes a surplus power absorption module, which is used to:

[0044] When the flexible DC transmission system in the AC / DC energy consumption device coordination system is in bipolar connection form and a unipolar line fault is detected, the AC energy consumption device is quickly put into use, and the flexible DC transmission system switches to unipolar operation mode. The active power of the AC / DC energy consumption device coordination system is 0.5PN.

[0045] When the AC system of the offshore converter station fails, the DC side voltage of the wind turbine converter in the wind farm is detected to rise to the threshold voltage, and the AC energy consumption device is quickly put into use to absorb the surplus power.

[0046] As an embodiment of the present invention, the AC / DC energy consumption device coordination system is as follows Figure 2 As shown, it includes wind farms, AC energy consumption devices, offshore converter stations, DC energy consumption devices, receiving end systems and onshore converter stations. Specifically, the offshore wind power transmission system adopts dual configuration of AC energy consumption devices and DC energy consumption devices, in a coordinated mode. The AC side of the offshore transmission system is equipped with AC energy consumption devices, and the DC side of the onshore converter station is equipped with DC energy consumption devices. The energy consumption capacity of both is 0.5P N Configuration (P N=The total active power generated by the wind farm). Real-time monitoring of the DC line voltage Ud. When a fault occurs in the AC system at the receiving end of the onshore converter station, the AC bus voltage decreases, causing the DC line voltage to rise. The surplus power required to be consumed by the energy-consuming device is calculated. When the DC line voltage is monitored to be greater than 1.1Ud and the surplus power is less than 0.5P N , DC energy consumption device is put into use; when the DC line voltage is monitored to be greater than 1.1Ud and the surplus power is greater than 0.5P N , the AC energy consumption device and the DC energy consumption device are put into operation at the same time.

[0047] Furthermore, when the flexible DC system is in a bipolar wiring form, when a unipolar line fault is detected, the AC energy consumption device is quickly put into operation and the system switches to a unipolar operation mode to maintain stable system operation and the system active power transmission is stabilized at 0.5PN.

[0048] Furthermore, when a fault occurs in the AC system of the offshore converter station, the voltage on the DC side of the wind turbine converter is detected to rise to the limit, and the AC energy consumption device is quickly put into operation to absorb the surplus power, providing sufficient time for the control response of the wind turbine pitch angle and other controls.

[0049] The AC / DC energy consumption device coordination device according to the embodiment of the present invention can cope with the DC overvoltage problem caused by AC system failure in offshore converter stations and onshore converter stations, and can quickly absorb surplus power. In particular, for bipolar flexible DC transmission systems, when a single-pole line fails and needs to be shut down, the energy consumption device can quickly absorb the excess power and maintain normal and stable transmission of active power. N The capacity requirements are greatly reduced, and the requirements for device tolerance and investment costs are greatly reduced.

[0050] Examples, such as Figure 3 As shown, this embodiment also provides a power control method based on the AC / DC energy consumption device coordination device, the method comprising:

[0051] S1, real-time monitoring of the DC line voltage in the coordination system of AC and DC energy consuming devices;

[0052] S2, when it is detected that a fault occurs in the receiving system connected to the onshore converter station, the AC bus voltage decreases and the DC line voltage increases, and the surplus power required to be consumed by the AC energy consumption device and the DC energy consumption device is calculated;

[0053] S3, when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is less than the power threshold, the DC energy consumption device is put into use;

[0054] S4, when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold, and the surplus power is greater than the power threshold, the AC energy consumption device and the DC energy consumption device are put into use at the same time.

[0055] Furthermore, the DC line voltage is Ud, the voltage threshold is 1.1Ud, and the power threshold is 0.5P N .

[0056] Furthermore, the energy consumption capacity of any device in the AC energy consumption device and the DC energy consumption device adopts 0.5P N Configuration, where P N The total active power output by the wind farm in the system is coordinated with the AC and DC energy consumption devices.

[0057] Furthermore, when the flexible DC transmission system in the AC / DC energy consumption device coordination system is in a bipolar connection form and a unipolar line fault is detected, the AC energy consumption device is quickly put into use, and the flexible DC transmission system switches to a unipolar operation mode. The active power of the AC / DC energy consumption device coordination system is 0.5PN.

[0058] When the AC system of the offshore converter station fails, the DC side voltage of the wind turbine converter in the wind farm is detected to rise to the threshold voltage, and the AC energy consumption device is quickly put into use to absorb the surplus power.

[0059] The power control method based on the coordinated cooperation device of AC and DC energy consuming devices according to the embodiment of the present invention can cope with the DC overvoltage problem caused by AC system failure in offshore converter stations and onshore converter stations, and can quickly absorb surplus power. In particular, for bipolar flexible DC transmission systems, when a single-pole line fails and needs to be shut down, the energy consuming device can quickly absorb the excess power and maintain normal and stable transmission of active power. N The capacity requirements are greatly reduced, and the requirements for device tolerance and investment costs are greatly reduced.

[0060] In order to implement the method of the above embodiment, the present invention also provides a computer device, such as Figure 4 As shown, the computer device 600 includes a memory 601 and a processor 602; wherein the processor 602 runs a program corresponding to the executable program code by reading the executable program code stored in the memory 601, so as to implement each step of the method described above.

[0061] In order to implement the above embodiments, the present application further proposes a non-transitory computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the above embodiments is implemented.

[0062] It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device, or component. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wires, optical cables, RF (radio frequency), etc., or any suitable combination thereof.

[0063] The computer-readable medium may be included in the electronic device or may exist independently and not incorporated into the electronic device. The computer-readable medium carries one or more programs. When executed by the electronic device, the one or more programs cause the electronic device to perform the method for determining sediment content in flowing water according to the above embodiment.

[0064] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0067] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0068] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing it in a suitable manner if necessary, and then storing it in a computer memory.

[0069] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0070] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0071] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0072] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A coordinated device for AC and DC energy consumption devices, characterized in that: include: A voltage monitoring module for real-time monitoring of the DC line voltage in the AC / DC energy consumption device coordination system; wherein the AC / DC energy consumption device coordination system includes a wind farm, AC energy consumption devices, an offshore converter station, a DC energy consumption device, a receiving system, and an onshore converter station; a surplus power calculation module, configured to calculate the surplus power required to be consumed by the AC energy consumption device and the DC energy consumption device when it is detected that a fault occurs in the receiving system connected to the onshore converter station, resulting in a decrease in the AC bus voltage and an increase in the DC line voltage; The first energy consumption device application module is configured to put the DC energy consumption device into use when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than a voltage threshold and the surplus power is less than a power threshold; The second energy consumption device application module is configured to simultaneously put the AC energy consumption device and the DC energy consumption device into use when it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than a voltage threshold and the surplus power is greater than a power threshold; The DC line voltage is Ud, the voltage threshold is 1.1Ud, and the power threshold is 0.5P N ; The energy consumption capacity of any one of the AC energy consumption device and the DC energy consumption device adopts 0.5P N Configuration, where P N The total active power output by the wind farm in the system coordinated with the AC and DC energy consumption devices; The device further includes a surplus power absorption module, which is used to: When the flexible direct current transmission system in the AC / DC energy consumption device coordination system is in bipolar connection form and a unipolar line fault is detected, the AC energy consumption device is quickly put into use and the flexible direct current transmission system switches to unipolar operation mode. The active power of the AC / DC energy consumption device coordination system is 0.5P N ; When an AC system failure occurs in the offshore converter station, the DC side voltage of the wind turbine converter in the wind farm is detected to rise to a threshold voltage, and the AC energy consumption device is quickly put into use to absorb surplus power.

2. A power control method based on the AC / DC energy consumption device coordination device according to claim 1, characterized in that: include: Real-time monitoring of DC line voltage in the coordination system of AC and DC energy consuming devices; When it is detected that a fault occurs in the receiving system connected to the onshore converter station, the AC bus voltage decreases and the DC line voltage increases, and the surplus power required to be consumed by the AC energy consumption device and the DC energy consumption device is calculated; When it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is less than the power threshold, the DC energy consumption device is put into use; When it is monitored that the DC line voltage in the AC / DC energy consumption device coordination system is greater than the voltage threshold and the surplus power is greater than the power threshold, the AC energy consumption device and the DC energy consumption device are put into use simultaneously.

3. A computer device, characterized in that: including processor and memory; The processor reads the executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the power control method according to claim 2.

4. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the power control method according to claim 2 is implemented.

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