A configuration method and system of a power consumption device of a new energy island flexible direct current transmission and delivery system

Abstract

The application discloses a new energy island flexible direct current transmission system energy consumption device configuration method and system, comprising: obtaining the system rated capacity of the new energy island flexible direct current transmission system and the minimum energy consumption capacity of the energy consumption device, and the proportion value of the minimum energy consumption capacity in the rated capacity; determining the group number of the energy consumption device based on the proportion value; determining the energy consumption capacity of each group of energy consumption devices based on the proportion value and the system rated capacity, so as to configure the energy consumption device based on the group number of the energy consumption device and the energy consumption capacity of each group of energy consumption devices. The application can achieve higher switching precision and efficiently configure the energy consumption device on the basis of keeping the total number of energy consumption devices much lower than the capacity configuration method of the current groups of energy consumption devices, and has important engineering practical value for guaranteeing the safe and stable operation of the power grid.

Description

Technical Field

[0001] This invention relates to the field of power system safety and stability control technology, and more specifically, to a configuration method and system for an energy-consuming device in a new energy islanded flexible direct transmission system. Background Technology

[0002] Flexible DC transmission technology, with its unique advantages of independent decoupling control of active and reactive power, access to passive networks, and no risk of commutation failure, has been increasingly widely applied in large-scale renewable energy transmission projects in deserts, Gobi, and arid regions in recent years. Renewable energy is transmitted via flexible DC transmission technology, and the amount of renewable energy generated is not controlled by the flexible DC transmission system. However, with the continuous increase in the capacity of flexible DC transmission projects, the problem of absorbing transient surplus power after a fault in the flexible DC transmission project has gradually become a major issue in engineering design and operation.

[0003] The issue of surplus power absorption is crucial to the operational safety of the entire flexible DC transmission project. Surplus power that is not adequately absorbed during transient periods will be directly injected into the converter station and stored in the converter station's MMC submodule capacitors. Excessive surplus power will directly threaten the operational safety of the converter station, potentially leading to equipment burnout, project shutdown, and other dangerous accidents. Currently, flexible DC transmission projects mainly absorb transient surplus power by configuring AC and DC energy dissipation devices. However, deploying AC energy dissipation devices at the sending end of the flexible DC system is currently the only feasible solution that can cover all surplus power absorption. Currently, surplus power absorption in projects is achieved by configuring energy dissipation devices with a capacity equal to that of the project. When the power of a single energy dissipation device is too large, the number of devices is small, and the control system complexity is low. However, switching on excessively large capacity energy dissipation devices will have an adverse effect on the weak AC system. Switching on a single small capacity energy dissipation device has a smaller impact on the AC system, but the number of such devices will be very large, which is detrimental to the design and maintenance of the control system. In actual engineering projects, different equipment can be used to absorb transient surplus power, but all of them need to be grouped to achieve precise switching.

[0004] Therefore, a method for configuring energy-consuming devices in a new energy island flexible direct transmission system is needed. Summary of the Invention

[0005] This invention proposes a method and system for configuring energy-consuming devices in a new energy island flexible direct transmission system, in order to solve the problem of how to configure energy-consuming devices in a flexible direct transmission system.

[0006] To address the aforementioned problems, according to one aspect of the present invention, a method for configuring an energy-consuming device in a new energy island flexible direct transmission system is provided, the method comprising:

[0007] Obtain the system rated capacity of the new energy island flexible direct transmission system and the ratio of the minimum energy consumption capacity of the energy-consuming device to the rated capacity;

[0008] The number of energy-consuming devices is determined based on the aforementioned ratio value;

[0009] The energy consumption capacity of each group of energy-consuming devices is determined based on the ratio value and the rated capacity of the system, so as to configure the energy-consuming devices based on the number of groups of energy-consuming devices and the energy consumption capacity of each group of energy-consuming devices.

[0010] Preferably, the energy-consuming device includes: an AC energy-consuming resistor, a DC energy-consuming resistor after rectification, a battery energy storage device, a compressed gas energy storage device, a flywheel energy storage device, a supercapacitor energy storage device, a capacitor bank energy storage device, and a superconducting coil energy storage device.

[0011] Preferably, determining the number of energy-consuming devices based on the ratio value includes:

[0012]

[0013] Where N is the number of energy-consuming devices; m is the ratio value; This indicates rounding up to the nearest integer.

[0014] Preferably, determining the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the system's rated capacity includes:

[0015] S i =2 i-1 ×m×S 总 ,

[0016] Among them, S i The energy consumption capacity of the i-th group of energy-consuming devices; m is the proportional value; S 总 The rated capacity of the system.

[0017] According to another aspect of the present invention, a configuration system for an energy-consuming device in a new energy island flexible direct transmission system is provided, the method comprising:

[0018] The data acquisition unit is used to acquire the rated capacity of the new energy island flexible direct transmission system and the ratio of the minimum energy consumption capacity of the energy-consuming device to the rated capacity.

[0019] A group number determination unit is used to determine the number of energy-consuming devices based on the ratio value;

[0020] An energy consumption capacity determination unit is used to determine the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the rated capacity of the system, so as to configure the energy-consuming devices based on the number of groups of energy-consuming devices and the energy consumption capacity of each group of energy-consuming devices.

[0021] Preferably, the energy-consuming device includes: an AC energy-consuming resistor, a DC energy-consuming resistor after rectification, a battery energy storage device, a compressed gas energy storage device, a flywheel energy storage device, a supercapacitor energy storage device, a capacitor bank energy storage device, and a superconducting coil energy storage device.

[0022] Preferably, the group number determining unit determines the number of energy-consuming devices based on the ratio value, including:

[0023]

[0024] Where N is the number of energy-consuming devices; m is the ratio value; This indicates rounding up to the nearest integer.

[0025] Preferably, the energy consumption capacity determining unit determines the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the system rated capacity, including:

[0026] S i =2 i-1 ×m×S 总 ,

[0027] Among them, S i The energy consumption capacity of the i-th group of energy-consuming devices; m is the proportional value; S 总 The rated capacity of the system.

[0028] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the steps in a method for configuring an energy-consuming device in a new energy island flexible direct transmission system.

[0029] According to another aspect of the present invention, the present invention provides an electronic device, comprising:

[0030] The aforementioned computer-readable storage medium; and

[0031] One or more processors for executing a program in the computer-readable storage medium.

[0032] This invention provides a method and system for configuring energy-consuming devices in a renewable energy islanded flexible direct transmission system. The method includes: obtaining the system's rated capacity and the ratio of the minimum energy consumption capacity of each energy-consuming device to the rated capacity of the renewable energy islanded flexible direct transmission system; determining the number of groups of energy-consuming devices based on the ratio; determining the energy consumption capacity of each group of energy-consuming devices based on the ratio and the system's rated capacity; and configuring the energy-consuming devices based on the number of groups and the energy consumption capacity of each group. This invention achieves higher switching accuracy and efficient configuration of energy-consuming devices while maintaining a significantly lower total number of energy-consuming devices compared to current methods that configure each group of energy-consuming devices with equal capacity. This has significant practical engineering value for ensuring the safe and stable operation of the power grid. Attached Figure Description

[0033] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0034] Figure 1 A flowchart of a method for configuring energy-consuming devices in a new energy island flexible direct transmission system according to an embodiment of the present invention;

[0035] Figure 2 This is a topology diagram of a flexible-vertical system according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the configuration system 300 of the energy-consuming device of the new energy island flexible direct transmission system according to an embodiment of the present invention. Detailed Implementation

[0037] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0038] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0039] Figure 1 This is a flowchart of a method for configuring energy-consuming devices in a new energy island flexible direct transmission system according to an embodiment of the present invention. Figure 1As shown, the configuration method for energy-consuming devices in a new energy islanded flexible direct transmission system provided by this invention can achieve higher switching accuracy and efficiently configure energy-consuming devices while maintaining a total number of energy-consuming devices that is far lower than the current method of configuring energy-consuming devices with equal capacity in each group. This has significant engineering practical value for ensuring the safe and stable operation of the power grid. The configuration method 100 for energy-consuming devices in a new energy islanded flexible direct transmission system provided by this invention begins at step 101. In step 101, the system rated capacity of the new energy islanded flexible direct transmission system and the ratio of the minimum energy consumption capacity of the energy-consuming device to the rated capacity are obtained.

[0040] Preferably, the energy-consuming device includes: an AC energy-consuming resistor, a DC energy-consuming resistor after rectification, a battery energy storage device, a compressed gas energy storage device, a flywheel energy storage device, a supercapacitor energy storage device, a capacitor bank energy storage device, and a superconducting coil energy storage device.

[0041] In step 102, the number of energy-consuming devices is determined based on the ratio value.

[0042] Preferably, determining the number of energy-consuming devices based on the ratio value includes:

[0043]

[0044] Where N is the number of energy-consuming devices; m is the ratio value; This indicates rounding up to the nearest integer.

[0045] In step 103, the energy consumption capacity of each group of energy-consuming devices is determined based on the ratio value and the rated capacity of the system, so as to configure the energy-consuming devices based on the number of groups of energy-consuming devices and the energy consumption capacity of each group of energy-consuming devices.

[0046] Preferably, determining the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the system's rated capacity includes:

[0047] S i =2 i-1 ×m×S 总 ,

[0048] Among them, S i The energy consumption capacity of the i-th group of energy-consuming devices; m is the proportional value; S 总 The rated capacity of the system.

[0049] Combination Figure 2 As shown, in this invention, the capacity of each group of energy-consuming devices is designed according to a preset ratio. The ratio is designed according to the weight of each bit of the binary number from low to high during the conversion from binary to decimal in a digital circuit. For any i-th group of energy-consuming devices, its energy consumption capacity is denoted as S. iThe rated capacity of the flexible DC system is denoted as S. 总 Let N be the number of energy-consuming devices. Then, the energy consumption capacity of each group of energy-consuming devices must satisfy the following formula:

[0050] S1: S2: S3: ...:S N = 1:2:4:...:2 N-1 (1)

[0051]

[0052] Based on the principle of proportional configuration between the energy-consuming device capacity and the system capacity, under this grouping principle, the minimum group capacity S1 accounts for the system's rated capacity as follows: Where N depends on the proportion of the minimum energy-consuming device capacity to the system's rated capacity required by the project. During the design phase, energy-consuming devices can be arranged and combined in advance according to the actual power demands of each group. Different combinations represent different energy consumption power. Under this configuration ratio, the input energy consumption power can be flexibly adjusted through power electronic switch combinations. Let the input energy consumption capacity be S. input for:

[0053] S input =k×S1 (3)

[0054] Where S1 is the energy consumption capacity of the first group of energy-consuming devices; the value range of k is... This allows for tiered regulation of energy consumption, achieving refined energy consumption through small-grouping.

[0055] When the project requires the energy consumption capacity S1 of the first group of energy-consuming devices to account for the rated capacity S of the flexible DC system 总 When the ratio is m, the value of m ranges from [0.0001-1]. The smaller the value of m, the more precise the energy consumption adjustment, but the number of energy consumption groups that need to be installed will also increase accordingly. At this time, the following relationship exists:

[0056]

[0057] Therefore, the energy consumption capacity S1 of the smallest energy-consuming device (i.e., the energy consumption capacity of the first group of energy-consuming devices) is:

[0058] S1=m×S 总 (5)

[0059] At this point, the number of groups N can be determined as:

[0060]

[0061] The energy consumption capacity of the i-th group of energy-consuming devices is:

[0062] S i =2 i-1 ×m×S总 (7)

[0063] In this invention, when N in equation (6) is equal to the minimum energy-consuming device capacity S1 given in the engineering project, which is a percentage of the rated capacity S of the flexible DC system... 总 When the ratio value of m cannot be taken as an integer, N is rounded up, and the energy consumption capacity of each group of energy-consuming devices is determined according to formula (7).

[0064] In this invention, the energy-consuming devices include: an AC energy-consuming resistor, a DC energy-consuming resistor after rectification, a battery energy storage device, a compressed gas energy storage device, a flywheel energy storage device, a supercapacitor energy storage device, a capacitor bank energy storage device, and a superconducting coil energy storage device. These can be configured according to the actual needs of the project.

[0065] The method of the present invention can efficiently and accurately calculate the number of energy-consuming devices to be installed and the energy-consuming capacity of each group after given the rated capacity of the flexible DC engineering system and the ratio of the minimum energy-consuming capacity to the rated capacity of the system. This improves the efficiency of determining the capacity of energy-consuming devices and improves the switching accuracy of energy-consuming devices based on the same number of energy-consuming devices.

[0066] Figure 3 This is a schematic diagram of the configuration system 300 of the energy-consuming device in the new energy island flexible direct transmission system according to an embodiment of the present invention. Figure 3 As shown, the configuration system 300 for the energy consumption device of the new energy island flexible direct transmission system provided in this embodiment of the invention includes: a data acquisition unit 301, a group number determination unit 302, and an energy consumption capacity determination unit 303.

[0067] Preferably, the data acquisition unit 301 is used to acquire the rated capacity of the new energy island flexible direct transmission system and the ratio of the minimum energy consumption capacity of the energy-consuming device to the rated capacity.

[0068] Preferably, the energy-consuming device includes: an AC energy-consuming resistor, a DC energy-consuming resistor after rectification, a battery energy storage device, a compressed gas energy storage device, a flywheel energy storage device, a supercapacitor energy storage device, a capacitor bank energy storage device, and a superconducting coil energy storage device.

[0069] Preferably, the group number determination unit 302 is used to determine the number of energy-consuming devices based on the ratio value.

[0070] Preferably, the group number determining unit 302 determines the number of energy-consuming devices based on the ratio value, including:

[0071]

[0072] Where N is the number of energy-consuming devices; m is the ratio value; This indicates rounding up to the nearest integer.

[0073] Preferably, the energy consumption capacity determination unit 303 is used to determine the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the rated capacity of the system, so as to configure the energy-consuming devices based on the number of groups of energy-consuming devices and the energy consumption capacity of each group of energy-consuming devices.

[0074] Preferably, the energy consumption capacity determining unit 303 determines the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the system rated capacity, including:

[0075] S i =2 i-1 ×m×S 总 ,

[0076] Among them, S i The energy consumption capacity of the i-th group of energy-consuming devices; m is the proportional value; S 总 The rated capacity of the system.

[0077] The configuration system 300 for the energy-consuming device of the new energy island flexible direct transmission system in this embodiment corresponds to the configuration method 100 for the energy-consuming device of the new energy island flexible direct transmission system in another embodiment of this invention, and will not be described again here.

[0078] Based on another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the steps in a method for configuring an energy-consuming device in a new energy island flexible direct transmission system.

[0079] According to another aspect of the present invention, the present invention provides an electronic device, comprising:

[0080] The aforementioned computer-readable storage medium; and

[0081] One or more processors for executing a program in the computer-readable storage medium.

[0082] The invention has been described with reference to a few embodiments. However, as will be known to those skilled in the art, and as defined in the appended claims, other embodiments besides those disclosed above fall equivalently within the scope of the invention.

[0083] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

[0084] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0085] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0086] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0087] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for configuring energy-consuming devices in a new energy islanded flexible direct transmission system, characterized in that, The method includes: Obtain the system rated capacity of the new energy island flexible direct transmission system and the ratio of the minimum energy consumption capacity of the energy-consuming device to the rated capacity; The number of energy-consuming devices is determined based on the aforementioned ratio value; Based on the ratio value and the system rated capacity, the energy consumption capacity of each group of energy-consuming devices is determined, so as to configure the energy-consuming devices based on the number of groups of energy-consuming devices and the energy consumption capacity of each group of energy-consuming devices. The step of determining the number of energy-consuming devices based on the ratio value includes: ， Where N is the number of energy-consuming devices; m is the ratio value; Indicates rounding up; The step of determining the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the system's rated capacity includes: ， in, is the energy consumption capacity of the i-th group of energy-consuming devices; m is the proportional value; The rated capacity of the system.

2. The method according to claim 1, characterized in that, The energy-consuming devices include: AC energy-consuming resistors, DC energy-consuming resistors after rectification equipment, battery energy storage devices, compressed gas energy storage devices, flywheel energy storage devices, supercapacitor energy storage devices, capacitor bank energy storage devices, and superconducting coil energy storage devices.

3. A configuration system for an energy-consuming device in a new energy islanded flexible direct transmission system, characterized in that, The system includes: The data acquisition unit is used to acquire the rated capacity of the new energy island flexible direct transmission system and the ratio of the minimum energy consumption capacity of the energy-consuming device to the rated capacity. A group number determination unit is used to determine the number of energy-consuming devices based on the ratio value; An energy consumption capacity determination unit is used to determine the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the rated capacity of the system, so as to configure the energy-consuming devices based on the number of groups of energy-consuming devices and the energy consumption capacity of each group of energy-consuming devices. The group number determination unit determines the number of energy-consuming devices based on the ratio value, including: ， Where N is the number of energy-consuming devices; m is the ratio value; Indicates rounding up; The energy consumption capacity determination unit determines the energy consumption capacity of each group of energy-consuming devices based on the ratio value and the system's rated capacity, including: ， in, is the energy consumption capacity of the i-th group of energy-consuming devices; m is the proportional value; The rated capacity of the system.

4. The system according to claim 3, characterized in that, The energy-consuming devices include: AC energy-consuming resistors, DC energy-consuming resistors after rectification equipment, battery energy storage devices, compressed gas energy storage devices, flywheel energy storage devices, supercapacitor energy storage devices, capacitor bank energy storage devices, and superconducting coil energy storage devices.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1-2.

6. An electronic device, characterized in that, include: The computer-readable storage medium as described in claim 5; as well as One or more processors for executing a program in the computer-readable storage medium.

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