Micro-grid control method and system for multiple new energy networking based on alternating current bus

Abstract

The invention provides a micro-grid control method and system for multiple new energy networking based on an alternating current bus. The method comprises the following steps: acquiring power supply data of a main power grid and power data of each distributed power supply in real time; determining the power supply state of the main power grid and the operation state of each distributed power supply based on the power supply data of the main power grid and the power data of each distributed power supply; if the power supply state of the main power grid is abnormal, selectively selecting one distributed power supply as a main reference source based on the power data of each distributed power supply; and / or, if the operation state of at least one distributed power supply is a fault, isolating the at least one distributed power supply of which the operation state is the fault, and re-networking the power supply parameters of the other distributed power supplies based on the power data of the distributed power supplies. Automatic networking and independent power supply of each distributed power supply are realized, continuous and stable power supply execution of networking is ensured, and intelligent management of networking is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of microgrid control based on multiple renewable energy networks of an AC bus, and specifically provides a microgrid control method and system based on multiple renewable energy networks of an AC bus. Background Art

[0002] Domestic renewable energy is developing rapidly. In high-penetration renewable energy power generation systems, traditional grid-connected control technologies have been severely challenged, and a wave of research on grid-connected control technologies that are conducive to the stable operation of high-penetration renewable energy power generation has been set off.

[0003] With the widespread use of various renewable energy power systems, renewable energy sources such as wind / solar energy, which are volatile and uncertain, have high requirements for the flexibility of the power system as the main energy supplier.

[0004] Moreover, as the diversity and randomness of user electricity demand gradually increase, the microgrid control method in the existing technology is used to control the networking of various new energy sources, which is prone to unstable power supply. Even when the main power grid fails, the entire network cannot operate, resulting in a low user experience.

[0005] Accordingly, the art needs a new microgrid control solution based on AC busbar-based multi-new energy networking to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects, the present invention is proposed to provide a microgrid control method and system for a microgrid network based on an AC bus for controlling a variety of renewable energy networks, which solves or at least partially solves the technical problem that the microgrid control method in the prior art is used to control a variety of renewable energy networks, which is very prone to unstable power supply, or even when the main power grid fails, the entire network cannot operate, resulting in a low user experience.

[0007] In a first aspect, the present invention provides a microgrid control method for a plurality of new energy networks based on an AC bus, the method being applied to a microgrid control system, the system being connected to a plurality of distributed power sources, the method comprising the following steps: Obtain the power supply data of the main power grid and the power data of each distributed power source in real time; Based on the power supply data of the main power grid and the power data of each distributed power source, determine the power supply status of the main power grid and the operating status of each distributed power source; If the power supply status of the main power grid is abnormal, based on the power data of each distributed power source, selectively select a distributed power source as a main reference source; and / or, If at least one distributed power source is in a faulty operating state, at least one distributed power source in a faulty operating state is isolated, and based on the power data of each distributed power source, the power supply parameters of the remaining distributed power sources are re-networked to ensure continuous and stable power supply.

[0008] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the power supply data of the main grid and the power data of each distributed power source are used to determine the power supply status of the main grid and the operating status of each distributed power source, including: Based on the power supply data of the main power grid, determine whether the main power grid is out of power: If the answer is yes, then it is determined that the power supply status of the main power grid is abnormal; If the judgment is no, then based on the power supply data of the main power grid, determine whether the power supply of the main power grid is stable: If the judgment is yes, then the power supply status of the main power grid is determined to be normal; Otherwise, it is determined that the power supply status of the main power grid is abnormal.

[0009] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the selective selection of a distributed power source as a main reference source based on the power data of each distributed power source includes: The power data of each distributed power source is substituted into the power supply control model, so that the backup main reference source is selectively updated according to the power data of each distributed power source, and the distributed power source corresponding to the latest backup main reference source is used as the main reference source and output.

[0010] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the power data of each distributed power source is substituted into the power supply control model, and one of the distributed power sources is selectively determined as the main reference source and outputted, including: Based on the power data of each distributed power source, the plurality of distributed power sources are preliminarily screened to selectively obtain a plurality of preliminarily screened distributed power sources; Based on the multiple distributed power sources after initial screening, selectively update the backup main reference source; The distributed power source corresponding to the latest backup main reference source is used as the main reference source and output.

[0011] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the multiple distributed power sources are preliminarily screened based on the power data of each distributed power source, and the multiple distributed power sources after the preliminarily screening are selectively obtained, including: If the data of each data type in the power data of the distributed power source meets the preset power supply reference requirements matching the data types, the distributed power source is retained; Otherwise, the distributed power source is eliminated to achieve a preliminary screening of the distributed power sources; and, If the multiple distributed power sources are all eliminated, all distributed power sources are isolated and protected, and the power supply data of the main power grid is obtained in real time; If at least one distributed power source is retained, all the retained distributed power sources are used as the multiple distributed power sources after the initial screening.

[0012] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the power supply control model stores a preset backup main reference source database, the preset backup main reference source database stores the distributed power sources corresponding to the backup main reference source and the capacity scores corresponding to the distributed power sources, and the selective updating of the backup main reference source based on the multiple distributed power sources after the initial screening includes: Based on the power data corresponding to the multiple distributed power sources after the initial screening, a capacity score corresponding to each distributed power source after the initial screening is generated; If the capability score corresponding to the distributed power source is higher than the capability score corresponding to the backup main reference source in the preset backup main reference source database, updating the backup main reference source based on the distributed power source and the capability score corresponding to the distributed power source; Otherwise, updating the backup master reference source is not performed.

[0013] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the power data corresponding to the distributed power source also includes the active power and reactive power output by the distributed power source; the power data corresponding to the multiple distributed power sources after the initial screening are used to generate the capacity score corresponding to each distributed power source after the initial screening, including: Based on the data type of the power data corresponding to each distributed power source after the initial screening being the power supply voltage value, determine the voltage deviation value corresponding to each distributed power source after the initial screening; Based on the data type of the power data corresponding to each distributed power source after the initial screening being data of power supply frequency, determine the frequency deviation value corresponding to each distributed power source after the initial screening; Determine the power factor corresponding to each distributed power source after the initial screening based on the active power and reactive power output by the distributed power source in the power data corresponding to each distributed power source after the initial screening; Based on the voltage deviation value, voltage deviation value and power factor corresponding to each distributed power source after the initial screening, a capability score corresponding to each distributed power source after the initial screening is generated.

[0014] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the re-networking of the power supply parameters of the remaining distributed power sources based on the power data of each distributed power source includes: The power data of the remaining distributed power sources are substituted into the power supply control model, so that multiple groups of power supply combination parameters are generated according to the power data of the remaining distributed power sources, and based on the multiple groups of power supply combination parameters, one group of power supply combination parameters is selected for output, wherein the power supply combination parameters include the power supply parameters of each remaining distributed power source.

[0015] In a technical solution of the microgrid control method for multiple new energy networking based on AC bus, the power data of the remaining distributed power sources are substituted into the power supply control model, so that multiple groups of power supply combination parameters are generated according to the power data of the remaining distributed power sources, and a group of power supply combination parameters are selected for output according to the multiple groups of power supply combination parameters, including: Get the latest power supply requirements; Generate multiple groups of power supply combination parameters based on the power data of other distributed power sources and the latest power supply demand; Simulating multiple groups of power supply combination parameters separately to obtain simulated power data of each group of power supply combination parameters; Based on the simulation data of each group of power supply combination parameters, an evaluation score of each group of power supply combination parameters is obtained; A set of power supply combination parameters with the highest evaluation score is selected as the power supply combination parameters and outputted.

[0016] In a second aspect, the present invention provides a microgrid control system, the system being connected to a plurality of distributed power sources, the system comprising a measurement module, a power supply regulation model and a control device, the measurement module comprising at least a power data measurement device and a power measurement device, the power supply regulation model storing a preset backup main reference source database and a preset score comparison table, the control device comprising a processor and a memory, the memory being suitable for storing a plurality of program codes, the program codes being suitable for being loaded and run by the processor to execute the microgrid control method based on a plurality of new energy sources networking based on an AC bus as described in any one of the technical solutions of the above-mentioned technical solution of the microgrid control method based on a plurality of new energy sources networking based on an AC bus.

[0017] The above one or more technical solutions of the present invention have at least one or more of the following beneficial effects: By obtaining the power supply data of the main power grid and the power data of each distributed power source in real time, the power supply status of the main power grid and the operating status of each distributed power source are determined, and real-time monitoring of the status of the main power grid and the power parameters of each distributed power source is realized. When the main power grid is abnormal, a distributed power source is selectively selected as the main reference source according to the power data of each distributed power source, so as to facilitate the continuous power supply of multiple new energy networks when the main power grid is unstable, so as to ensure that when the main power grid is abnormal, the microgrid control system can always operate autonomously to provide a stable reference voltage and frequency for the entire network, and / or, when there is a faulty distributed power source, the faulty distributed power source is isolated, and the remaining distributed power sources are re-networked according to the power data of each distributed power source, so as to realize automatic networking and independent power supply of each distributed power source, so as to ensure that the network performs continuous and stable power supply, thereby realizing intelligent management of the network, avoiding the microgrid control method in the prior art to control multiple new energy networks, which is prone to unstable power supply, and even when the main power grid fails, the entire network cannot operate, resulting in a low user experience. Technical problems.

[0018] In the technical solution for implementing the present invention, in the model processing, the power data of each distributed power source is used to preliminarily screen the multiple distributed power sources, and the multiple distributed power sources after the preliminary screening are selectively obtained. Then, according to the multiple distributed power sources after the preliminary screening, respective capability scores are generated, and then according to the capability score of each distributed power source, the backup main reference source is selectively updated, and the latest backup main reference source is used as the main reference source and output, so as to realize timely updating and confirmation of the main reference source, and ensure that the power data of the selected main reference source meets the preset power supply reference requirements and has the highest capability score, thereby ensuring the management and control capability of the main reference source over the remaining distributed power sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which: Figure 1 It is a flowchart of main steps of a microgrid control method based on multiple new energy networking of an AC bus according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the main structural block diagram of a microgrid control system according to an embodiment of the present invention.

[0020] The reference numerals are as follows: 200: microgrid control system; 201: control device; 2011: processor; 2012: memory; 2013: program code; 202: measurement module; 2021: power data measurement device; 2022: power measurement device; 203: power supply regulation model; 2031: backup main reference source database; 2032: score comparison table. DETAILED DESCRIPTION

[0021] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] In the description of the present invention, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, and memories, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-temporary computer-readable storage media include any suitable medium that can store program codes, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, and the like. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B", and may include only A, only B, or A and B. The singular terms "one" and "the" may also include plural forms.

[0023] See attached Figure 1 , Figure 1 1 is a flow chart of the main steps of a microgrid control method based on multiple new energy networks of an AC bus according to an embodiment of the present invention. Figure 1 As shown, the microgrid control method for multiple new energy networking based on AC bus in an embodiment of the present invention is applied to a microgrid control system, the system is connected to multiple distributed power sources, and the method mainly includes the following steps S101-step S103.

[0024] Step S101: acquiring power supply data of the main power grid and power data of each distributed power source in real time; Specifically, in some embodiments, the plurality of distributed power sources include a variety of renewable energy power generation sources such as solar energy, wind energy, and biomass energy.

[0025] Step S102: determining the power supply status of the main grid and the operating status of each distributed power source based on the power supply data of the main grid and the power data of each distributed power source; Specifically, in some embodiments, determining the power supply status of the main power grid and the operating status of each distributed power source based on the power supply data of the main power grid and the power data of each distributed power source includes: Based on the power supply data of the main power grid, determine whether the main power grid is out of power: If the answer is yes, then it is determined that the power supply status of the main power grid is abnormal; If the judgment is no, then based on the power supply data of the main power grid, determine whether the power supply of the main power grid is stable: If the judgment is yes, then the power supply status of the main power grid is determined to be normal; Otherwise, it is determined that the power supply status of the main power grid is abnormal.

[0026] Specifically, in some embodiments, judging whether there is a power outage in the main power grid based on the power supply data of the main power grid includes: If, in the power supply data of the main power grid, each data in the power supply data is within a preset power-off reference range corresponding to each data type, it is determined that there is a power outage in the main power grid; Otherwise, it is determined that there is no power outage in the main power grid.

[0027] The data types of the various data in the power supply data include at least the waveforms of the power supply voltage value, the power supply current value, the power supply frequency and the power supply phase; The preset power-off reference range corresponding to the supply voltage value may be 40V, the preset power-off reference range corresponding to the supply current value may be 5A, and the preset power-off reference range corresponding to the supply frequency may be 50HZ. The settings of the preset power-off reference ranges corresponding to various data types here are only exemplary descriptions. In actual tests, those skilled in the art can set them according to actual needs, which will not be repeated here.

[0028] Specifically, in some embodiments, judging whether the power supply of the main power grid is stable based on the power supply data of the main power grid includes: Based on the power supply data of the main power grid, obtaining a difference between data of each data type of the main power grid and a preset power supply threshold corresponding to the data type; If the difference between any item of the power supply data of the main power grid and the preset power supply threshold corresponding to the data type reaches a preset power supply difference threshold, it is determined that the power supply of the main power grid is unstable; Otherwise, it is determined that the power supply of the main power grid is stable.

[0029] Among them, the preset power supply threshold is set by the management personnel, the preset power supply difference threshold corresponding to the data type of power supply voltage value can be 20V, the preset power supply difference threshold corresponding to the data type of power supply current value can be 6A, the preset power supply difference threshold corresponding to the data type of power supply frequency can be 50HZ, and the preset power supply difference threshold corresponding to the data type of the number of power supply phases can be 1. The settings of the preset power supply thresholds corresponding to each data type here are only exemplary descriptions. In actual tests, technical personnel in this field can set them according to actual needs, which will not be repeated here.

[0030] In the above embodiment, the power supply data of the main power grid is used to determine the power supply status of the main power grid and whether the power supply is stable, thereby ensuring the stable power supply of various new energy networks, thereby providing guarantee for the stability of the synchronous and coordinated power supply of various new energy networks, and improving the management capability of various new energy networks.

[0031] Step S103: If the power supply state of the main power grid is abnormal, based on the power data of each distributed power source, selectively select a distributed power source as a main reference source; and / or, If at least one distributed power source is in a faulty operating state, at least one distributed power source in a faulty operating state is isolated, and based on the power data of each distributed power source, the power supply parameters of the remaining distributed power sources are re-networked to ensure continuous and stable power supply.

[0032] Specifically, in some embodiments, selectively selecting a distributed power source as a main reference source based on power data of each distributed power source includes: The power data of each distributed power source is substituted into the power supply control model, so that the backup main reference source is selectively updated according to the power data of each distributed power source, and the distributed power source corresponding to the latest backup main reference source is used as the main reference source and output.

[0033] Specifically, in some embodiments, substituting the power data of each distributed power source into the power supply control model, selectively determining one of the distributed power sources as the main reference source and outputting it includes: Based on the power data of each distributed power source, the plurality of distributed power sources are preliminarily screened to selectively obtain a plurality of preliminarily screened distributed power sources; Based on the multiple distributed power sources after initial screening, selectively update the backup main reference source; The distributed power source corresponding to the latest backup main reference source is used as the main reference source and output.

[0034] Specifically, in some embodiments, the plurality of distributed power sources are preliminarily screened to obtain a plurality of preliminarily screened distributed power sources, or all distributed power sources are isolated and protected.

[0035] Specifically, in some embodiments, the preliminarily screening the plurality of distributed power sources based on the power data of each distributed power source, and selectively obtaining the preliminarily screened plurality of distributed power sources includes: If the data of each data type in the power data of the distributed power source meets the preset power supply reference requirements matching the data types, the distributed power source is retained; Otherwise, the distributed power source is eliminated to achieve a preliminary screening of the distributed power sources; and, If the multiple distributed power sources are all eliminated, all distributed power sources are isolated and protected, and the power supply data of the main power grid is obtained in real time; If at least one distributed power source is retained, all the retained distributed power sources are used as the multiple distributed power sources after the initial screening.

[0036] Specifically, each data type in the power data corresponds one-to-one to each data type in the power supply data; Wherein, if the waveform of the power supply phase in the power data of the distributed power source is consistent with the waveform of the power supply phase in the preset power supply reference requirement, the distributed power source is retained; Among them, the preset power supply reference requirements matching each data type can be set by the management personnel or according to the user's needs. The preset power supply reference requirement matching the supply voltage value can be 220V, the preset power supply reference requirement matching the supply current value can be 2.5A, and the preset power supply reference requirement matching the power supply frequency can be 50HZ. The settings of the preset power supply reference requirements matching each data type here are only exemplary descriptions. In actual tests, those skilled in the art can set them according to actual needs, which will not be repeated here.

[0037] Specifically, in some embodiments, after isolating and protecting all distributed power sources and acquiring power supply data of the main power grid in real time, the method further includes: Based on the power supply data of the main power grid reacquired in real time, it is determined that the power supply state of the main power grid is normal, and then the power data of each distributed power source is reacquired; Based on the re-acquired power data of each distributed power source, the power supply parameters of the remaining distributed power sources are selectively networked to ensure continuous and stable power supply.

[0038] Specifically, in some embodiments, a preset backup main reference source database is stored in the power supply control model, and the preset backup main reference source database stores the distributed power sources corresponding to the backup main reference source and the capacity scores corresponding to the distributed power sources. The selective updating of the backup main reference source based on the multiple distributed power sources after the initial screening includes: Based on the power data corresponding to the multiple distributed power sources after the initial screening, a capacity score corresponding to each distributed power source after the initial screening is generated; If the capability score corresponding to the distributed power source is higher than the capability score corresponding to the backup main reference source in the preset backup main reference source database, updating the backup main reference source based on the distributed power source and the capability score corresponding to the distributed power source; Otherwise, updating the backup master reference source is not performed.

[0039] Specifically, in some embodiments, after the distributed power source corresponding to the latest backup main reference source is used as the main reference source and outputted, the method further includes: Based on the latest master reference source, the power supply parameters of the remaining distributed power sources are re-networked to ensure continuous and stable power supply.

[0040] Specifically, in some embodiments, the power data corresponding to the distributed power source also includes active power and reactive power output by the distributed power source; the power data corresponding to the plurality of distributed power sources after the initial screening, generating the capacity score corresponding to each distributed power source after the initial screening includes: Based on the data type of the power data corresponding to each distributed power source after the initial screening being the power supply voltage value, determine the voltage deviation value corresponding to each distributed power source after the initial screening; Based on the data type of the power data corresponding to each distributed power source after the initial screening being data of power supply frequency, determine the frequency deviation value corresponding to each distributed power source after the initial screening; Determine the power factor corresponding to each distributed power source after the initial screening based on the active power and reactive power output by the distributed power source in the power data corresponding to each distributed power source after the initial screening; Based on the voltage deviation value, voltage deviation value and power factor corresponding to each distributed power source after the initial screening, a capability score corresponding to each distributed power source after the initial screening is generated.

[0041] Specifically, in some embodiments, the voltage deviation value corresponding to each distributed power source after the initial screening is obtained by the following formula:

[0042] in, is the voltage deviation value corresponding to the distributed power source after initial screening, is a data value of a data type of supply voltage value in the power data of the distributed power source, It is a voltage value corresponding to a preset power supply reference requirement that matches the power supply voltage value.

[0043] Specifically, in some embodiments, the frequency deviation value corresponding to each distributed power source after the initial screening is obtained by the following formula:

[0044] in, is the frequency deviation value corresponding to the distributed power source after initial screening, The data value of the data type of the power data of the distributed power source is the power supply frequency, It is a frequency value corresponding to a preset power supply reference requirement that matches the power supply frequency.

[0045] Specifically, in some embodiments, the power factor corresponding to each distributed power source after the initial screening is obtained by the following formula:

[0046] in, is the power factor corresponding to the distributed power source after initial screening, is the active power output by the distributed power source, is the reactive power output by the distributed power source.

[0047] Specifically, in some embodiments, a preset score comparison table is also stored in the power supply control model, and the preset score comparison table includes multiple data types, multiple score numbers corresponding to each data type, and the value of each data type corresponding to each score number. The voltage deviation value, voltage deviation value and power factor corresponding to each distributed power source after the initial screening are generated to generate the capability score corresponding to each distributed power source after the initial screening, including: Based on the preset score comparison table, the voltage deviation value, voltage deviation value and power factor corresponding to each distributed power source after the initial screening, the score number of each data type corresponding to each distributed power source after the initial screening is obtained; Based on the score numbers of each data type corresponding to each distributed power source after the initial screening, a capability score corresponding to each distributed power source after the initial screening is generated.

[0048] Specifically, in some embodiments, the capability score corresponding to each distributed power source after the initial screening is obtained by the following formula: The capability score corresponding to the distributed power source after the initial screening = the sum of (the score number of each data type corresponding to the distributed power source * the preset weight coefficient corresponding to each data type).

[0049] In the above embodiment, in the model processing, the multiple distributed power sources are preliminarily screened through the power data of each distributed power source, and the multiple distributed power sources after the preliminary screening are selectively obtained. Then, according to the multiple distributed power sources after the preliminary screening, respective capability scores are generated, and then according to the capability score of each distributed power source, the backup main reference source is selectively updated, and the latest backup main reference source is used as the main reference source and output, so as to realize timely updating and confirmation of the main reference source, and ensure that the power data of the selected main reference source meets the preset power supply reference requirements and has the highest capability score, thereby ensuring the management and control capabilities of the main reference source over the remaining distributed power sources.

[0050] Specifically, in some embodiments, re-networking the power supply parameters of the remaining distributed power sources based on the power data of each distributed power source includes: The power data of the remaining distributed power sources are substituted into the power supply control model, so that multiple groups of power supply combination parameters are generated according to the power data of the remaining distributed power sources, and based on the multiple groups of power supply combination parameters, one group of power supply combination parameters is selected for output, wherein the power supply combination parameters include the power supply parameters of each remaining distributed power source.

[0051] Specifically, in some embodiments, the power data of the remaining distributed power sources are substituted into the power supply control model, so that multiple groups of power supply combination parameters are generated according to the power data of the remaining distributed power sources, and a group of power supply combination parameters are selected and output according to the multiple groups of power supply combination parameters, including: Get the latest power supply requirements; Generate multiple groups of power supply combination parameters based on the power data of other distributed power sources and the latest power supply demand; Simulating multiple groups of power supply combination parameters separately to obtain simulated power data of each group of power supply combination parameters; Based on the simulation data of each group of power supply combination parameters, an evaluation score of each group of power supply combination parameters is obtained; A set of power supply combination parameters with the highest evaluation score is selected as the power supply combination parameters and outputted.

[0052] In the above embodiment, by obtaining the latest power supply demand and combining it with the power data of the remaining distributed power sources, multiple groups of power supply combination parameters are generated and simulated, and based on the simulation results, the score of each group of power supply combination parameters is evaluated, and the group with the highest score is selected as the power supply combination parameters, thereby realizing the re-networking of multiple distributed power sources to ensure the stable power supply of multiple new energy networks.

[0053] Specifically, in some embodiments, the method for generating multiple sets of power supply combination parameters can adopt a trained neural network model or a trained machine learning model. The selection of the method for generating multiple sets of power supply combination parameters here is only an exemplary description. In actual testing, technical personnel in this field can make a selection according to actual needs, as long as multiple sets of power supply combination parameters can be generated according to the power data of the remaining distributed power sources and the latest power supply requirements, it will not be repeated here.

[0054] Specifically, in some embodiments, the simulation technology for separately simulating multiple groups of power supply combination parameters can adopt the simulation technology in the prior art. The selection of simulation technology here is only an exemplary description. In actual testing, technical personnel in this field can make a selection according to actual needs. As long as it is possible to simulate multiple groups of power supply combination parameters separately and obtain simulation data for each group of power supply combination parameters, it will not be repeated here.

[0055] Specifically, in some embodiments, the simulated power data includes simulated power combination data of multiple distributed power sources, wherein the simulated combination data corresponds one-to-one to multiple data types of power data of the distributed power sources, and the simulation data based on each group of power supply combination parameters to obtain the evaluation score of each group of power supply combination parameters includes: Based on the simulation data of each group of power supply combination parameters, a simulation capability score corresponding to each distributed power source in each group of power supply combination parameters is obtained; Based on the simulation capability score corresponding to each distributed power source in each set of power supply combination parameters, the average simulation capability score corresponding to each set of power supply combination parameters is determined, and the average simulation capability score corresponding to each set of power supply combination parameters is used as the evaluation score of each set of power supply combination parameters.

[0056] Specifically, in some embodiments, the method for obtaining the simulation capability score corresponding to each distributed power source in each set of power supply combination parameters is consistent with the method for obtaining the capability score corresponding to each distributed power source after the initial screening, which will not be repeated here.

[0057] Specifically, in some embodiments, the average simulation capability score corresponding to each group of power supply combination parameters is obtained by the following formula: The average simulation capability score corresponding to the power supply combination parameter=the sum of the simulation capability scores corresponding to each distributed power source corresponding to the power supply combination parameter / the number of distributed power sources corresponding to the power supply combination parameter.

[0058] Specifically, the power supply requirement includes data of various data types, and the data types in the power supply requirement correspond one-to-one with the data types in the power data and the data types of the data in the power supply data.

[0059] Specifically, in some embodiments, the method further includes: If the power supply status of the main power grid is normal, it is determined whether the operating status of each distributed power source is a fault.

[0060] Specifically, in some embodiments, the method further includes: If the power supply status of the main grid returns to normal, the current main reference source is connected to the main grid for grid-connected operation.

[0061] Specifically, in some embodiments, the method further includes: If the operating status of any distributed power source that was in a faulty state returns to normal, the power supply parameters of the remaining distributed power sources are re-networked based on the latest main reference source or main power grid, so that the microgrid control system can provide complete power supply capabilities.

[0062] In the above embodiment, by re-networking the remaining distributed power sources when the distributed power sources return to normal, the microgrid control method realizes automatic networking and independent power supply of each distributed power source to ensure that the network maintains continuous and stable power supply.

[0063] Based on the above steps S101 to S103, the power supply status of the main grid and the operating status of each distributed power source are determined by obtaining the power supply data of the main grid and the power data of each distributed power source in real time, so as to realize real-time monitoring of the status of the main grid and the power parameters of each distributed power source. When the main grid is abnormal, a distributed power source is selectively selected as the main reference source according to the power data of each distributed power source, so as to facilitate the continuous power supply of multiple new energy networks when the main grid is unstable, so as to ensure that when the main grid is abnormal, the microgrid control system can always operate autonomously to provide a stable reference voltage and frequency for the entire network, and / or, when there is a faulty distributed power source, the faulty distributed power source is isolated, and the remaining distributed power sources are re-networked according to the power data of each distributed power source, so as to realize automatic networking and independent power supply of each distributed power source, so as to ensure that the network performs continuous and stable power supply, thereby realizing intelligent management of the network, avoiding the microgrid control method in the prior art to control multiple new energy networks, which is very prone to unstable power supply, and even when the main grid fails, the entire network cannot operate, resulting in a low user experience. Technical problems.

[0064] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effects of the present invention, different steps do not have to be performed in such an order, and they can be performed simultaneously (in parallel) or in other orders. These changes are within the scope of protection of the present invention.

[0065] Furthermore, the present invention also provides a microgrid control system.

[0066] See attached Figure 2 , Figure 2 FIG. 1 is a main structural block diagram of a microgrid control system according to an embodiment of the present invention. Figure 2 As shown, the microgrid control system 200 in the embodiment of the present invention is connected to multiple distributed power sources, and the system mainly includes a measurement module 202, a power supply control model 203 and a control device 201, wherein the measurement module 202 at least includes a power data measurement device 2021 and a power measurement device 2022, and the power supply control model 203 stores a preset backup main reference source database 2031 and a preset score comparison table 2032, and the control device 201 includes a processor 2011 and a memory 2012, and the memory 2012 can be configured to store a program code 2013 for executing a microgrid control method for multiple new energy networks based on an AC bus according to the above method embodiment, and the processor 2011 can be configured to execute the program code 2013 in the memory 2012, and the program code 2013 includes but is not limited to executing a microgrid control method for multiple new energy networks based on an AC bus according to the above method embodiment. For ease of explanation, only the part related to the embodiment of the present invention is shown, and for specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The control device 201 may be a control device 201 device including various electronic devices.

[0067] Specifically, in some embodiments, the preset backup master reference source database 2031 stores the distributed power source corresponding to the backup master reference source and the capability score corresponding to the distributed power source; The preset score comparison table 2032 includes multiple data types, multiple score numbers corresponding to each data type, and the value of each data type corresponding to each score number.

[0068] Specifically, in some embodiments, the power data measuring device 2021 can be a variety of sensor devices or different types of measuring devices. The selection of the power data measuring device 2021 is only an exemplary description. In actual testing, technical personnel in this field can make a selection according to actual needs. As long as the power data measuring device 2021 can be used to measure the power supply voltage value, power supply current value, power supply frequency and power supply phase waveform output by the distributed power supply, it will not be repeated here.

[0069] Specifically, in some embodiments, the power data corresponding to the distributed power source also includes active power and reactive power output by the distributed power source measured by the power measurement device 2022 .

[0070] Specifically, in some embodiments, the power measuring device 2022 is used to measure the active power and reactive power output by the distributed power supply. The power measuring device 2022 can be a power analyzer. The selection of the power measuring device 2022 here is only an exemplary description. In actual testing, technical personnel in this field can make a selection according to actual needs. As long as the active power and reactive power output by the distributed power supply can be measured by the power measuring device 2022, it will not be repeated here.

[0071] In one implementation, the description of the specific implementation functions may refer to steps S101 to S103.

[0072] The microgrid control system 200 is used to execute Figure 1 The embodiment of the microgrid control method for networking multiple renewable energy sources based on an AC bus is shown. The technical principles, technical problems solved and technical effects produced by the two are similar. Technical personnel in this technical field can clearly understand that for the convenience and conciseness of description, the specific working process and related instructions of the microgrid control system 200 can refer to the contents described in the embodiment of the microgrid control method for networking multiple renewable energy sources based on an AC bus, which will not be repeated here.

[0073] It is understood by those skilled in the art that the present invention implements all or part of the processes in the method of the above embodiment, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor 2011, the steps of each of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium that can carry the computer program code. It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electric carrier signal and telecommunication signal.

[0074] Further, the microgrid control system 200 of the present invention also includes a computer-readable storage medium. In a computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium can be configured to store a program code 2013 for executing the microgrid control method for a variety of new energy networks based on an AC bus according to the above method embodiment. The program code 2013 can be loaded and run by the processor 211 to implement the above microgrid control method for a variety of new energy networks based on an AC bus. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium can be a memory 2012 device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present invention is a non-temporary computer-readable storage medium.

[0075] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor 2011 itself, or a part of the software, a part of the hardware, or a part of the combination of software and hardware in the processor 2011. Therefore, the number of each module in the figure is only schematic.

[0076] Those skilled in the art will appreciate that the modules in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present invention.

[0077] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A microgrid control method based on multiple new energy networking of AC bus, characterized in that: The method is applied to a microgrid control system, the system being connected to a plurality of distributed power sources, and the method comprises the following steps: Obtain the power supply data of the main power grid and the power data of each distributed power source in real time; Based on the power supply data of the main power grid and the power data of each distributed power source, determine the power supply status of the main power grid and the operating status of each distributed power source; If the power supply status of the main power grid is abnormal, based on the power data of each distributed power source, selectively select a distributed power source as a main reference source; and / or, If at least one distributed power source is in a faulty operating state, at least one distributed power source in a faulty operating state is isolated, and based on the power data of each distributed power source, the power supply parameters of the remaining distributed power sources are re-networked to ensure continuous and stable power supply.

2. The microgrid control method for multiple new energy networks based on AC bus according to claim 1 is characterized in that: The determining of the power supply status of the main power grid and the operating status of each distributed power source based on the power supply data of the main power grid and the power data of each distributed power source includes: Based on the power supply data of the main power grid, determine whether the main power grid is out of power: If the answer is yes, then it is determined that the power supply status of the main power grid is abnormal; If the judgment is no, then based on the power supply data of the main power grid, determine whether the power supply of the main power grid is stable: If the judgment is yes, then the power supply status of the main power grid is determined to be normal; Otherwise, it is determined that the power supply status of the main power grid is abnormal.

3. The microgrid control method for multiple new energy networks based on AC bus according to claim 2 is characterized in that: The selectively selecting a distributed power source as a main reference source based on the power data of each distributed power source includes: The power data of each distributed power source is substituted into the power supply control model, so that the backup main reference source is selectively updated according to the power data of each distributed power source, and the distributed power source corresponding to the latest backup main reference source is used as the main reference source and output.

4. The microgrid control method for multiple new energy networks based on AC bus according to claim 3 is characterized in that: Substituting the power data of each distributed power source into the power supply control model, selectively determining one of the distributed power sources as the main reference source and outputting it includes: Based on the power data of each distributed power source, the plurality of distributed power sources are preliminarily screened to selectively obtain a plurality of preliminarily screened distributed power sources; Based on the multiple distributed power sources after initial screening, selectively update the backup main reference source; The distributed power source corresponding to the latest backup main reference source is used as the main reference source and output.

5. The microgrid control method for multiple new energy networks based on AC bus according to claim 4 is characterized in that: The preliminarily screening the plurality of distributed power sources based on the power data of each distributed power source, and selectively obtaining the preliminarily screened plurality of distributed power sources includes: If the data of each data type in the power data of the distributed power source meets the preset power supply reference requirements matching the data types, the distributed power source is retained; Otherwise, the distributed power source is eliminated to achieve a preliminary screening of the distributed power sources; and, If the multiple distributed power sources are all eliminated, all distributed power sources are isolated and protected, and the power supply data of the main power grid is obtained in real time; If at least one distributed power source is retained, all the retained distributed power sources are used as the multiple distributed power sources after the initial screening.

6. The microgrid control method for multiple new energy networks based on AC bus according to claim 5 is characterized in that: The power supply control model stores a preset backup main reference source database, the preset backup main reference source database stores the distributed power sources corresponding to the backup main reference source and the capability scores corresponding to the distributed power sources, and the selective updating of the backup main reference source based on the multiple distributed power sources after the initial screening includes: Based on the power data corresponding to the multiple distributed power sources after the initial screening, a capacity score corresponding to each distributed power source after the initial screening is generated; If the capability score corresponding to the distributed power source is higher than the capability score corresponding to the backup main reference source in the preset backup main reference source database, updating the backup main reference source based on the distributed power source and the capability score corresponding to the distributed power source; Otherwise, updating the backup master reference source is not performed.

7. The microgrid control method for multiple new energy networks based on AC bus according to claim 6 is characterized in that: The power data corresponding to the distributed power source also includes the active power and reactive power output by the distributed power source; the power data corresponding to the plurality of distributed power sources after the initial screening, generating the capacity score corresponding to each distributed power source after the initial screening includes: Based on the data type of the power data corresponding to each distributed power source after the initial screening being the power supply voltage value, determine the voltage deviation value corresponding to each distributed power source after the initial screening; Based on the data type of the power data corresponding to each distributed power source after the initial screening being data of power supply frequency, determine the frequency deviation value corresponding to each distributed power source after the initial screening; Determine the power factor corresponding to each distributed power source after the initial screening based on the active power and reactive power output by the distributed power source in the power data corresponding to each distributed power source after the initial screening; Based on the voltage deviation value, voltage deviation value and power factor corresponding to each distributed power source after the initial screening, a capability score corresponding to each distributed power source after the initial screening is generated.

8. The microgrid control method for multiple new energy networks based on AC bus according to claim 7 is characterized in that: The re-networking of the power supply parameters of the remaining distributed power sources based on the power data of each distributed power source includes: The power data of the remaining distributed power sources are substituted into the power supply control model, so that multiple groups of power supply combination parameters are generated according to the power data of the remaining distributed power sources, and based on the multiple groups of power supply combination parameters, one group of power supply combination parameters is selected for output, wherein the power supply combination parameters include the power supply parameters of each remaining distributed power source.

9. The microgrid control method for multiple new energy networks based on AC bus according to claim 8 is characterized in that: Substituting the power data of the remaining distributed power sources into the power supply control model, so that multiple groups of power supply combination parameters are generated according to the power data of the remaining distributed power sources, and selecting a group of power supply combination parameters for output according to the multiple groups of power supply combination parameters includes: Get the latest power supply requirements; Generate multiple groups of power supply combination parameters based on the power data of other distributed power sources and the latest power supply demand; Simulating multiple groups of power supply combination parameters separately to obtain simulated power data of each group of power supply combination parameters; Based on the simulation data of each group of power supply combination parameters, an evaluation score of each group of power supply combination parameters is obtained; A set of power supply combination parameters with the highest evaluation score is selected as the power supply combination parameters and outputted.

10. A microgrid control system, characterized in that: The system is connected to multiple distributed power sources, and the system includes a measurement module, a power supply regulation model and a control device. The measurement module includes at least a power data measurement device and a power measurement device. The power supply regulation model stores a preset backup main reference source database and a preset score comparison table. The control device includes a processor and a memory. The memory is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the microgrid control method for networking multiple new energy sources based on an AC bus as described in any one of claims 1 to 9.

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