Method for sensing state of network construction type new energy power generation system and related device

Abstract

The invention relates to a network construction type new energy power generation system state sensing method and a related device, and belongs to the technical field of electric power systems.The network construction type new energy power generation system state sensing method comprises the steps that operation state data of power generation equipment in a network construction type new energy power generation system are acquired, determining the operation state of the power generation equipment based on the operation state data; on the basis of the operation state of the power generation equipment and in combination with disturbance information of a station in the network construction type new energy power generation system, the voltage frequency supporting capacity of the station is calculated; and determining the power grid supporting capability of a cluster in combination with the operation state of the power generation equipment, the voltage frequency supporting capability of the station and the correlation between the station and the cluster in the network-forming type new energy power generation system. According to the method, the problems that networking new energy equipment information is difficult to acquire and the equipment is not guaranteed are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular, to a method for state perception of a grid-forming new energy power generation system and related devices. Background Art

[0002] China is rich in wind and light resources. As of the end of August 2024, the installed capacity of new energy power generation in China (including wind power generation, solar power generation, and biomass power generation) was 1.27 billion kilowatts, accounting for 40.7% of the total installed power generation capacity. Compared with the static operation mechanism of traditional power grids with clear dominant variables, the high proportion of new energy with characteristics such as low inertia and random output reduces the anti-disturbance ability and regulation ability of the power grid. The structural contradiction between power sources seriously affects system stability and the accommodation and transmission of new energy. Grid-forming new energy power generation equipment has the ability of active networking and voltage and frequency support, which can improve the stability of the power system for large-scale new energy grid connection. Therefore, it has great development potential in large new energy bases.

[0003] While the grid-forming new energy power generation system has great development potential, it faces environments such as extremely cold, extremely hot, and strong wind and sand. It needs to be frequently regulated to withstand higher transient overvoltage stresses, and it is prone to problems such as accelerated aging of key components, increased probability of equipment failure, and sudden increase in cluster scheduling pressure. When applied on a large scale, it is easy to have difficulties in real-time obtaining the health status of new energy power generation equipment in grid-forming conditions, affecting the operation and maintenance of the power system, reducing the safety of equipment, and being difficult to accurately evaluate the grid support ability of new energy clusters, making it difficult to meet the intelligent regulation requirements of grid-forming new energy clusters and restricting the development of new energy.

[0004] It can be seen that there are problems in the existing technology that it is difficult to obtain the equipment status of the grid-forming new energy power generation system in real time and it is difficult to accurately evaluate the grid support ability of the new energy cluster grid. Summary of the Invention

[0005] In view of this, it is necessary to provide a method for state perception of a grid-forming new energy power generation system and related devices to solve the problems in the existing technology that it is difficult to obtain the equipment status of the grid-forming new energy power generation system in real time and it is difficult to accurately evaluate the grid support ability of the new energy cluster grid.

[0006] To solve the above problems, the present invention provides a method for state perception of a grid-forming new energy power generation system, including: Obtain the operation status data of the power generation equipment in the grid-forming new energy power generation system, and determine the operation status of the power generation equipment based on the operation status data; Based on the operation status of the power generation equipment, combined with the disturbance information of the substation in the grid-forming new energy power generation system, calculate the voltage and frequency support ability of the substation; Determine the grid support capacity of the cluster by combining the operating status of the power generation equipment, the voltage and frequency support capacity of the substation, and the correlation between the substation and the cluster in the network-forming new energy power generation system.

[0007] In a possible implementation, obtain the operating status data of the power generation equipment in the network-forming new energy power generation system, including: Determine the measurement points of the operating status data of the power generation equipment in the network-forming new energy power generation system, and synchronously measure the operating status data of each measurement point based on the Beidou high-precision timing signal; Obtain the frequency and rate of change of frequency of the power generation equipment based on the time-synchronized sampling technology.

[0008] In a possible implementation, the operating status data includes the generated voltage and generated current of the power generation equipment. Determining the operating status of the power generation equipment based on the operating status data includes: Calculate the actual generated power of the power generation equipment based on the generated voltage and generated current; Obtain the theoretical generated power of the power generation equipment, and calculate the power reserve margin of the power generation equipment based on the theoretical generated power and the actual generated power.

[0009] In a possible implementation, based on the operating status of the power generation equipment, combine the disturbance information of the substation in the network-forming new energy power generation system to calculate the voltage and frequency support capacity of the substation, including: Obtain the disturbance response information after the substation in the network-forming new energy power generation system is disturbed. The disturbance includes power change and / or frequency change; Calculate the voltage and frequency support equivalent parameters based on the disturbance response information; Calculate the voltage and frequency support capacity of the substation based on the voltage and frequency support equivalent parameters and the multi-dimensional time series data related to the voltage and frequency support capacity of the substation.

[0010] In a possible implementation, the voltage and frequency support equivalent parameters include equivalent power increment , , equivalent inertia , equivalent elastic coefficient and equivalent droop coefficient , , where , and respectively represent the reduction amount of the unbalanced power of the system, the suppression degree of the rate of change of frequency, and the response power coefficient of the system frequency deviation during the support process of the substation, , , are voltage response characterization parameters.

[0011] In a possible implementation manner, calculating equivalent parameters of voltage and frequency support for a power station based on disturbance response information includes: Based on a mathematical model with an inertia constant in a continuous-time system, constructing a transfer function model in the discrete domain, and calculating an equivalent inertia coefficient and an equivalent elastic coefficient by combining the function model and a preset parameter matrix, where the calculation formula is:

[0012] Wherein, is the difference between the generation frequency and the synchronous frequency, is the voltage difference, i is the measurement time, is the time constant.

[0013] In a possible implementation manner, determining the grid support ability of a cluster by combining the operating state of power generation equipment, the voltage and frequency support ability of a power station, and the correlation between the power station and the cluster in a network-forming new energy power generation system includes: Constructing a graph model of the cluster based on the operating state of power generation equipment and the cluster topology relationship in the network-forming new energy power generation system; Taking the operating state data, the graph model, and the cluster topology relationship as the input of a preset graph spatio-temporal network to obtain the grid support ability of the cluster.

[0014] The present invention also provides a state perception device for a network-forming new energy power generation system, including: An equipment perception module, configured to obtain the operating state data of power generation equipment in the network-forming new energy power generation system and determine the operating state of the power generation equipment based on the operating state data; A power station perception module, configured to calculate the voltage and frequency support ability of the power station based on the operating state of the power generation equipment and in combination with the disturbance information of the power station in the network-forming new energy power generation system; A cluster perception module, configured to determine the grid support ability of the cluster by combining the operating state of the power generation equipment, the voltage and frequency support ability of the power station, and the correlation between the power station and the cluster in the network-forming new energy power generation system.

[0015] The present invention also provides an electronic device, including a memory and a processor, wherein, The memory is used to store a program; The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps in the state perception method of the network-forming new energy power generation system in any of the above embodiments.

[0016] The present invention also provides a computer-readable storage medium for storing computer-readable programs or instructions, and when the programs or instructions are executed by a processor, the steps in the state perception method of the network-forming new energy power generation system in any of the above embodiments can be implemented.

[0017] The beneficial effects of the present invention are as follows: The method for state perception of a network-forming new energy power generation system provided by the present invention can determine the operating state of power generation equipment by obtaining the operating state data of the power generation equipment in the network-forming new energy power generation system. Combining the disturbance information of the substation in the network-forming new energy power generation system, calculate the voltage and frequency support ability of the substation, and then combine the correlation between the substation and the cluster in the network-forming new energy power generation system to determine the grid support ability of the cluster. It provides an online monitoring method and a unified perception system for equipment, substations, and clusters, integrates multi-level and multi-dimensional data of the network-forming new energy power generation system, obtains the transmission relationship of energy and information between equipment status and system operation, solves the problems of difficult information acquisition and lack of guarantee for network-forming new energy equipment, meets the requirements of intelligent regulation, and improves the stability of the network-forming new energy power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic flowchart of a method for state perception of a network-forming new energy power generation system provided by an embodiment of the present invention; Figure 2 It is a schematic flowchart of an implementation manner of S101 provided by an embodiment of the present invention; Figure 3 It is a schematic flowchart of a method for calculating power reserve margin provided by an embodiment of the present invention; Figure 4 It is a schematic flowchart of an implementation manner of S102 provided by an embodiment of the present invention; Figure 5 It is a schematic flowchart of an implementation manner of S103 provided by an embodiment of the present invention; Figure 6 It is a schematic structural diagram of a network-forming new energy power generation system provided by an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a perception device for a network-forming new energy power generation system provided by an embodiment of the present invention; Figure 8 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0021] In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0022] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The occurrence of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] A specific embodiment of the present invention, as Figure 1 shown, discloses a method for state perception of a network-forming new energy power generation system, including: S101, obtaining the operation state data of the power generation equipment in the network-forming new energy power generation system, and determining the operation state of the power generation equipment based on the operation state data; S102, calculating the voltage and frequency support capability of the substation based on the operation state of the power generation equipment and combining the disturbance information of the substation in the network-forming new energy power generation system; S103, determining the power grid support capability of the cluster by combining the operation state of the power generation equipment, the voltage and frequency support capability of the substation, and the correlation between the substation and the cluster in the network-forming new energy power generation system.

[0024] In the embodiments of the present invention, the network-forming new energy power generation system includes multiple cluster power grids. Each cluster power grid includes multiple substations, and each substation includes multiple power generation equipment. For different power generation equipment, different operation state data needs to be obtained. For example, in a wind farm, the wind turbines, converters, and box-type transformers are mainly monitored, and the output voltage and current of the generator, the output voltage and current of the wind turbine converter, and the voltage and current at the grid connection point are selected as the operation state data. The operation state of the photovoltaic array, busbar trunking unit, and inverter in a photovoltaic power station is monitored, and parameters such as the output voltage and current of the photovoltaic array, the voltage and current after inversion, and the voltage and current at the grid connection point are collected as the operation state data. Of course, the operation state data of each power generation equipment in the network-forming new energy power generation system not only includes the data mentioned above, but any other data related to the power generation system should belong to the operation state data, and the present invention does not limit this.

[0025] Further, based on the operation status data of each power generation device, the operation status of each power generation device can be determined. The operation status of the power generation device includes, but is not limited to, whether the power generation device is operating normally, power generation power, power generation frequency, etc. Based on the operation status of the power generation device and the disturbance information of the substation in the grid-connected new energy power generation system, the voltage and frequency support ability of the substation is determined. The disturbance information includes the response data of the substation after being subjected to external interference, which will be described in detail later in the present invention. Further, combining the operation status of the power generation device, the voltage and frequency support ability of the substation, and the correlation between the substation and the cluster in the grid-connected new energy power generation system, the grid support ability of the cluster is determined.

[0026] The state perception method of the grid-connected new energy power generation system provided by the present invention can determine the operation status of the power generation device by obtaining the operation status data of the power generation device in the grid-connected new energy power generation system. Combining the disturbance information of the substation in the grid-connected new energy power generation system, calculate the voltage and frequency support ability of the substation, and then combine the correlation between the substation and the cluster in the grid-connected new energy power generation system to determine the grid support ability of the cluster. It provides an online monitoring method and a unified perception system for equipment, substations and clusters, integrates multi-level and multi-dimensional data of the grid-connected new energy power generation system, obtains the transmission relationship of energy and information between equipment status and system operation, solves the problems of difficult information acquisition and lack of guarantee for grid-connected new energy equipment, meets the requirements of intelligent regulation, and improves the stability of the grid-connected new energy power generation system.

[0027] As a possible implementation manner of the present invention, in this implementation manner, as Figure 2 shown, obtaining the operation status data of the power generation device in the grid-connected new energy power generation system includes: S201, determining the measurement points of the operation status data of the power generation device in the grid-connected new energy power generation system, and synchronously measuring the operation status data of each measurement point based on the Beidou high-precision timing signal; S202, obtaining the frequency and frequency change rate of the power generation device based on the time synchronization sampling technology.

[0028] In the embodiment of the present invention, for different power generation devices, the measurement points of their operation status data are different. For example, the different measurement points of different power generation devices in the foregoing embodiments, the operation status data is obtained by installing measurement devices at the different measurement points, such as characteristic quantities such as power generation device power change, grid connection point frequency, frequency deviation, etc., to monitor the disturbances and noises occurring in the power grid and provide reliable electrical data for the substation layer. Among them, the Beidou high-precision timing signal can be used between the measurement devices to realize synchronous measurement of each measurement point, and a fine measurement method of frequency signal is formed according to the time synchronization sampling technology to obtain the frequency and frequency change rate.

[0029] The present invention sets different operating state data measurement points for different power generation devices, and combines synchronous measurement methods to synchronously measure the operating state data of different power generation devices to ensure data accuracy.

[0030] As a possible implementation manner of the present invention, in this implementation manner, as Figure 3 shown, the operating state data includes the power generation voltage and power generation current of the power generation device. Determining the operating state of the power generation device based on the operating state data includes: S301, calculating the actual power generation power of the power generation device based on the power generation voltage and power generation current; S302, obtaining the theoretical power generation power of the power generation device, and calculating the power reserve margin of the power generation device based on the theoretical power generation power and the actual power generation power.

[0031] In the embodiments of the present invention, there are multiple ways to calculate the actual power generation power of the power generation device and obtain the theoretical power generation power of the power generation device. For example, it can be obtained based on the power supply nameplate or the ideal resource-power generation power mapping relationship of the power generation unit is obtained by fitting the measured data. It is also possible to restore the resource meteorological information measured by devices such as the field light meter, the wind measurement tower, and the nacelle anemometer to the theoretical power. The present invention does not limit this.

[0032] Furthermore, the power reserve margin of the power generation device can be calculated through a formula. The calculation formula is as follows:

[0033] Wherein, and respectively represent the reserve margins of active power and reactive power, and respectively represent the maximum active power and reactive power at the current i moment, and represent the active power and reactive power generated at the current i moment.

[0034] The embodiments of the present invention can calculate the power generation power and the power reserve margin of the field station in the grid-forming new energy power generation system through the operating state data obtained in the foregoing embodiments.

[0035] As a possible implementation manner of the present invention, in this implementation manner, as Figure 4 shown, based on the operating state of the power generation device, combined with the disturbance information of the field station in the grid-forming new energy power generation system, calculate the voltage and frequency support ability of the field station, including: S401, obtaining the disturbance response information after the disturbance occurs at the field station in the grid-forming new energy power generation system, where the disturbance includes power change and / or frequency change; S402. Calculate the equivalent parameters of the voltage and frequency support of the power station based on the disturbance response information; S403. Calculate the voltage and frequency support capabilities of the power station based on the equivalent parameters of the voltage and frequency support and the multi-dimensional time-series data related to the voltage and frequency support capabilities of the power station.

[0036] In the embodiment of the present invention, during the use of the network-forming new energy power generation system, it will be subject to different degrees of interference, such as environmental changes, sandstorms, temperature changes, etc. The results brought about by these disturbance factors are that the power generation power and frequency of the network-forming new energy power generation system will be disturbed, and the frequency and power response characteristics after the disturbance occurs can be measured, and the equivalent parameters of the voltage and frequency support of the power station can be calculated. Specifically, the equivalent parameters of the voltage and frequency support include the equivalent power increment , , the equivalent inertia , the equivalent elastic coefficient and the equivalent droop coefficient , . Among them, , and respectively represent the reduction of the unbalanced power of the system during the support process of the power station, the degree of suppression of the frequency change rate, and the response power coefficient of the system frequency deviation. , , are voltage response characterization parameters.

[0037] Further, the multi-dimensional time-series data parameters such as the active and reactive power reserve margins, power increments, adjustable power boundaries, executable control parameter limits, equivalent inertia evaluation results, damping coefficients, equivalent reactive elastic coefficients, short-circuit ratios, and frequency change rates related to the voltage and frequency support capabilities of the new energy power station are used as data input quantities, and the high-order correlation representation coefficient matrix is solved to obtain the evaluation index of the voltage and frequency support capabilities of the new energy power station.

[0038] As a possible implementation manner of the present invention, in this implementation manner, calculating the equivalent parameters of the voltage and frequency support of the power station based on the disturbance response information includes: Based on the mathematical model with the inertia constant in the continuous-time system, a transfer function model in the discrete domain is constructed, and the equivalent inertia coefficient and the equivalent elastic coefficient are calculated by combining the function model and the preset parameter matrix. The calculation formula is:

[0039] Among them, is the difference between the power generation frequency and the synchronous frequency, is the voltage difference, i is the measurement time, is the time constant.

[0040] The present invention calculates the theoretical power generation power and the actual output power of the power generation equipment in the substation, and uses the voltage-frequency equivalent support parameter to characterize the support ability of the power generation equipment in the substation, so as to obtain the underlying response situation of the grid-connected new energy, and meet the active perception requirements of the differences and consistencies of various types of units.

[0041] As a possible implementation manner of the present invention, in this implementation manner, as Figure 5 shown, combining the operating state of the power generation equipment, the voltage-frequency support ability of the substation, and the correlation between the substation and the cluster in the grid-connected new energy power generation system, determine the grid support ability of the cluster, including: S501, constructing a graph model of the cluster based on the operating state of the power generation equipment and the cluster topology relationship in the grid-connected new energy power generation system; S502, taking the operating state data, the graph model, and the cluster topology relationship as the input of the preset graph spatio-temporal network to obtain the grid support ability of the cluster.

[0042] In the embodiment of the present invention, as Figure 6 shown, when calculating the grid support ability of the cluster, the correlation equation of the power generation equipment state in the cluster system can be determined first based on the electrical connection relationship and the system operation constraint relationship of the grid-connected new energy power generation system. Based on physical and data information such as wide-band multi-modal signal measurement nodes, topological structures, and power generation equipment states, a graph model that associates multi-level multi-modal measurement nodes, cluster topologies, and equipment state information is established. Combining multi-dimensional time-series data such as measured resource meteorological information and dynamic electrical parameters, a graph spatio-temporal network with the measured characteristic parameters-cluster topology-graph model as the input and the cluster support ability characterization as the output relationship is established, and pre-training of the graph spatio-temporal network based on self-supervised learning is carried out. Among them, the cluster support ability is mainly the distribution of voltage-frequency support equivalent parameters of each substation in the cluster. Further, according to the monitored different characteristic disturbance sources, output variables, and noise interference conditions, optimize the model parameters, and combine the resource meteorological prediction data to complete the training of the graph spatio-temporal network model, and output the evaluation results of the grid support ability of the cluster in the grid-connected new energy power generation system, including the real-time calculation results of the voltage-frequency support equivalent parameters and the long-term distribution prediction results, so as to realize the evaluation of the grid support ability of the new energy cluster in multiple scales of time and space.

[0043] Based on the active sensing technology of station equipment, the present invention establishes a regional networked new energy cluster support sensing model considering spatio-temporal distribution characteristics. From multiple perspectives such as measurement nodes, cluster topology, and equipment status information, combined with multiple inputs such as voltage, current, frequency, and environmental parameters, it realizes the evaluation of the power parameter support capabilities of new energy cluster devices under multi-scale space-time, provides assistance for multi-level value stream sensing, proposes energy flow, information flow, and value stream sensing methods, and studies multi-level information processing methods from equipment to cluster, enabling the operation monitoring, equipment management, and value extraction of power system networked new energy in a wide-area environment, and providing assistance for the development of new energy and the promotion of grid intelligence.

[0044] In order to better implement the state sensing method of the networked new energy power generation system in the embodiments of the present invention, correspondingly, based on the state sensing method of the networked new energy power generation system, as Figure 6 shown, the embodiments of the present invention also provide a state sensing device for a networked new energy power generation system. The state sensing device 700 for a networked new energy power generation system includes: An equipment sensing module 701, configured to obtain the operation status data of power generation equipment in the networked new energy power generation system, and determine the operation status of the power generation equipment based on the operation status data; A station sensing module 702, configured to calculate the voltage and frequency support capabilities of the station based on the operation status of the power generation equipment and in combination with the disturbance information of the station in the networked new energy power generation system; A cluster sensing module 703, configured to determine the grid support capabilities of the cluster in combination with the operation status of the power generation equipment, the voltage and frequency support capabilities of the station, and the correlation between the station and the cluster in the networked new energy power generation system.

[0045] The state sensing device 700 for the networked new energy power generation system provided in the above embodiments can implement the technical solutions described in the embodiments of the state sensing method of the networked new energy power generation system. The specific implementation principles of the above modules or units can be referred to the corresponding content in the embodiments of the state sensing method of the networked new energy power generation system, which will not be elaborated here.

[0046] As Figure 8 shown, the present invention also correspondingly provides an electronic device 800. The electronic device 800 includes a processor 801, a memory 802, and a display 803. Figure 8 Only some components of the electronic device 800 are shown, but it should be understood that it is not required to implement all the shown components, and more or fewer components can be alternatively implemented.

[0047] In some embodiments, the processor 801 may be a central processing unit (CPU), a microprocessor, or other data processing chips, which are used to run the program code stored in the memory 802 or process data, such as the method for state perception of the networked new energy power generation system in the present invention.

[0048] In some embodiments, the processor 801 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, the processor 801 may be local or remote. In some embodiments, the processor 801 may be implemented on a cloud platform. In some embodiments, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination of the above.

[0049] In some embodiments, the memory 802 may be an internal storage unit of the electronic device 800, such as the hard disk or memory of the electronic device 800. In some other embodiments, the memory 802 may also be an external storage device of the electronic device 800, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the electronic device 800.

[0050] Furthermore, the memory 802 may also include both the internal storage unit and the external storage device of the electronic device 800. The memory 802 is used to store the application software installed on the electronic device 800 and various types of data.

[0051] In some embodiments, the display 803 may be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (organic light-emitting diode) toucher, etc. The display 803 is used to display the information of the electronic device 800 and to display a visual user interface. The components 801-803 of the electronic device 800 communicate with each other through a system bus.

[0052] In some embodiments, when the processor 801 executes the program for state perception of the networked new energy power generation system in the memory 802, the following steps may be implemented: Obtain the operation state data of the power generation equipment in the networked new energy power generation system, and determine the operation state of the power generation equipment based on the operation state data; Based on the operation state of the power generation equipment, combine the disturbance information of the substation in the networked new energy power generation system, and calculate the voltage frequency support ability of the substation; Determine the grid support capacity of the cluster in combination with the operating status of the power generation equipment, the voltage and frequency support capacity of the substation, and the correlation between the substation and the cluster in the network-forming new energy power generation system.

[0053] It should be understood that when the processor 801 executes the network-forming new energy power generation system status perception program in the memory 802, in addition to the above functions, other functions can also be realized. For specific details, please refer to the description of the corresponding method embodiments above.

[0054] Furthermore, the embodiments of the present invention do not specifically limit the type of the mentioned electronic device 800. The electronic device 800 can be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of the portable electronic device include, but are not limited to, portable electronic devices equipped with IOS, android, microsoft, or other operating systems. The above-mentioned portable electronic devices can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (such as a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 800 can also be a non-portable electronic device, but a desktop computer with a touch-sensitive surface (such as a touch panel).

[0055] Correspondingly, the embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium is used to store computer-readable programs or instructions. When the programs or instructions are executed by the processor, the steps or functions in the network-forming new energy power generation system status perception method provided by the above-mentioned method embodiments can be realized.

[0056] Those skilled in the art can understand that all or part of the processes of realizing the above method embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. Among them, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory, or a random access memory, etc.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for state perception of a network-constructing new energy power generation system, characterized in that Including: Obtain the operation status data of the power generation equipment in the network-forming new energy power generation system, and determine the operation status of the power generation equipment based on the operation status data; Calculate the voltage and frequency support ability of the substation based on the operation status of the power generation equipment and the disturbance information of the substation in the network-forming new energy power generation system; Determine the grid support ability of the cluster by combining the operation status of the power generation equipment, the voltage and frequency support ability of the substation, and the correlation between the substation and the cluster in the network-forming new energy power generation system.

2. The state perception method of the network-constructing new energy power generation system according to claim 1, characterized in that The obtaining of the operation status data of the power generation equipment in the network-forming new energy power generation system includes: Determine the measurement points of the operation status data of the power generation equipment in the network-forming new energy power generation system, and synchronously measure the operation status data of each measurement point based on the Beidou high-precision timing signal; Obtain the frequency and rate of change of frequency of the power generation equipment based on the time-synchronized sampling technology.

3. The method for state perception of a network-forming new energy power generation system according to claim 2, wherein The operation status data includes the generated voltage and generated current of the power generation equipment. The determining of the operation status of the power generation equipment based on the operation status data includes: Calculate the actual generated power of the power generation equipment based on the generated voltage and the generated current; Obtain the theoretical generated power of the power generation equipment, and calculate the power reserve margin of the power generation equipment based on the theoretical generated power and the actual generated power.

4. The state perception method of the network-constructing new energy power generation system according to claim 2, characterized in that The calculating of the voltage and frequency support ability of the substation by combining the operation status of the power generation equipment and the disturbance information of the substation in the network-forming new energy power generation system includes: Obtain the disturbance response information after the substation in the network-forming new energy power generation system is disturbed, where the disturbance includes power change and / or frequency change; Calculate the voltage and frequency support equivalent parameters of the substation based on the disturbance response information; Calculate the voltage and frequency support ability of the substation based on the voltage and frequency support equivalent parameters and the multi-dimensional time series data related to the voltage and frequency support ability of the substation.

5. The state perception method of the network-constructing new energy power generation system according to claim 4, characterized in that, The equivalent parameters for voltage and frequency support include the equivalent active power increment and the equivalent reactive power increment , the equivalent inertia , the equivalent elastic coefficient and the equivalent droop coefficient , , where , and respectively represent the reduction of the unbalanced power in the system during the support process of the power station, the degree of suppression of the frequency change rate, and the response power coefficient of the system frequency deviation. , , are the voltage response characterization parameters.​ 6. The state perception method of the grid-forming new energy power generation system according to claim 5, characterized in that, The calculating of the voltage and frequency support equivalent parameters of the substation based on the disturbance response information includes: Based on the mathematical model with inertia constant in the continuous-time system, construct a transfer function model in the discrete domain, and calculate the equivalent inertia coefficient and equivalent elastic coefficient by combining the function model and the preset parameter matrix, where the calculation formula is: wherein, is the difference between the power generation frequency and the synchronous frequency, is the voltage difference, i is the measurement time, is the time constant.

7. The state perception method of the network-forming new energy power generation system according to claim 4, characterized in that The determining of the grid support ability of the cluster by combining the operation status of the power generation equipment, the voltage and frequency support ability of the substation, and the correlation between the substation and the cluster in the network-forming new energy power generation system includes: Construct a graph model of the cluster based on the operation status of the power generation equipment and the cluster topology relationship in the network-forming new energy power generation system; Use the operation status data, the graph model, and the topology relationship of the cluster as the input of the preset graph spatio-temporal network to obtain the grid support ability of the cluster.

8. A state perception device for a network-forming new energy power generation system, characterized in that, Including: An equipment perception module for obtaining the operation status data of the power generation equipment in the network-forming new energy power generation system and determining the operation status of the power generation equipment based on the operation status data; A substation perception module, configured to calculate the voltage and frequency support capability of the substation based on the operating state of the power generation equipment and in combination with the disturbance information of the substation in the grid-connected new energy power generation system; A cluster perception module, configured to determine the grid support capability of the cluster in combination with the operating state of the power generation equipment, the voltage and frequency support capability of the substation, and the correlation between the substation and the cluster in the grid-connected new energy power generation system.

9. An electronic device, characterized in that, Comprising a memory and a processor, wherein, The memory is configured to store programs; The processor is coupled to the memory and configured to execute the programs stored in the memory to implement the steps in the method for perceiving the state of the grid-connected new energy power generation system according to any one of claims 1 to 7 above.

10. A computer-readable storage medium, characterized in that, For storing computer-readable programs or instructions, which can implement the steps in the method for perceiving the state of the grid-connected new energy power generation system according to any one of claims 1 to 7 above when executed by a processor.

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