Intelligent micro-grid control method and system based on modular flexible control

Abstract

The invention discloses an intelligent micro-grid control method and system based on modular flexible control, and the method comprises the following steps: automatically setting parameters by the system based on a micro-grid control state, and configuring the set parameters to a power system, a power grid system, a load system and an energy storage system, according to the invention, the micro-grid is enabled to operate autonomously; the external data of the operation state of the micro-grid are acquired in real time, the external data of the operation state of the micro-grid are processed and analyzed through a control algorithm, and instructions are sent to a power supply system, a power grid system, a load system and an energy storage system according to the calculation result processed and analyzed through the control algorithm. By correspondingly adjusting a power supply system, a power grid system, a load system and an energy storage system, all links of micro-grid control can be integrated in the fastest time, so that safe and reliable operation of the micro-grid is ensured, and grid-connected and off-grid flexible switching with a large power grid can be quickly maintained.

Description

Technical Field

[0001] The present invention relates to the field of microgrid control technology, and in particular to an intelligent microgrid control method and system based on modular flexible control. Background Art

[0002] Under the background of dual carbon, the application scenarios of microgrids are becoming more and more numerous and complex. In order to reduce the impact on the large power grid and the flexible control of the microgrid itself, the flexible and intelligent control of various new energy sources and loads in the microgrid is becoming more and more urgent and necessary. Due to the different characteristics of wind power generation, photovoltaic power generation and diesel power generation, and the large volatility of the load itself, the requirements for intelligent and flexible control of microgrids are becoming more and more urgent and more and more realistic.

[0003] The existing technology has the characteristics of bloated algorithms, long calculation time, and weak scalability. Faced with various microgrid projects, it is often not possible to flexibly combine, resulting in long control time, weak control ability, and unpredictable system failures. In the actual application of microgrid projects, there may be situations where the control command issuance time is extended or even cannot be issued due to bloated algorithms, affecting the operation of the entire system, and even causing difficult-to-estimate property losses. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a smart microgrid control method and system based on modular flexible control to solve the problems raised in the above background technology.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A smart microgrid control method based on modular flexible control, the steps are as follows:

[0008] S1. Based on the microgrid control state, the system automatically sets parameters and configures the set parameters to the power system, grid system, load system and energy storage system, so that the microgrid can operate autonomously;

[0009] S2. During the operation of the microgrid, external data of the operation status of the microgrid is obtained in real time;

[0010] S3, processing and analyzing the external data of the operating status of the microgrid through the control algorithm;

[0011] S4. According to the calculation results after the control algorithm is processed and analyzed, instructions are issued to the power supply system, the power grid system, the load system and the energy storage system to adjust the power supply system, the power grid system, the load system and the energy storage system accordingly.

[0012] As a preferred solution of the intelligent microgrid control method based on modular flexible control described in the present invention, in step S2, the external data of the microgrid operating status acquired in real time includes grid voltage, frequency, PCS operating data, PCS alarm information, BMS operating data, BMS alarm information, fire operation data, dynamic ring data, auxiliary equipment status information, safety switch status data, power supply working status data, and load working status data.

[0013] As a preferred solution of the intelligent microgrid control method based on modular flexible control described in the present invention, in step S4, the instructions issued include: PCS on-grid and off-grid switching, PCS operating power change, PCS automatic charging and discharging, safety switch disconnection, auxiliary equipment operation, safety switch automatic closing, load power change, and power supply power change.

[0014] As a preferred solution of the intelligent microgrid control method based on modular flexible control described in the present invention, in step S4, the control algorithm executes the following steps based on the microgrid control strategy: obtain external data of the operating status of the microgrid, parse and analyze the data in turn, and then perform data calculation, interact with the power system, power grid system, load system and energy storage system according to the results of the data calculation, and issue corresponding control instructions to the power system, power grid system, load system and energy storage system, and the power system, power grid system, load system and energy storage system generate corresponding actions according to the corresponding instructions and then feed back the data to the control algorithm.

[0015] As a preferred solution of the intelligent microgrid control method based on modular flexible control described in the present invention, the control algorithm executes the following control strategy:

[0016] The control algorithm collects the voltage and frequency of the microgrid, and compares the collected voltage and frequency of the microgrid with the preset voltage and frequency of the microgrid. If the collected voltage and frequency of the microgrid are higher than the preset value, the power of the power supply system is controlled to reduce, the energy storage system is controlled to charge automatically, and the load system power is manually increased;

[0017] If the collected voltage and frequency of the microgrid are lower than the preset values, the power of the power supply system is controlled to increase, the energy storage system is controlled to discharge automatically, and the load system power is manually reduced.

[0018] As a preferred solution of the intelligent microgrid control method based on modular flexible control described in the present invention, the specific steps of controlling the power reduction / increase of the power supply system are as follows: the control algorithm sends a control instruction to the power supply system, and the power supply system safety switch automatically opens / closes to realize the power reduction / increase operation of the power supply system.

[0019] A system of a smart microgrid control method based on modular flexible control, comprising:

[0020] The parameter configuration unit is configured to: based on the control state of the microgrid, the system automatically sets parameters, and configures the set parameters to the power system, the grid system, the load system and the energy storage system, so that the microgrid can operate autonomously;

[0021] The data acquisition unit is configured to: acquire external data of the operation status of the microgrid in real time during the operation of the microgrid;

[0022] The data processing unit is configured to: process and analyze the external data of the operating status of the microgrid through a control algorithm;

[0023] The instruction issuing unit is configured to issue instructions to the power supply system, the power grid system, the load system and the energy storage system according to the calculation results after the control algorithm is processed and analyzed, and adjust the power supply system, the power grid system, the load system and the energy storage system accordingly.

[0024] As a preferred solution of the intelligent microgrid control system based on modular flexible control described in the present invention, the data processing unit includes a data parsing module, a data analysis module, a data calculation module, a data interaction module and a data feedback module.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the control algorithm provided by the present invention has modular programming, can be quickly combined according to the scale of different types of microgrids, has powerful computing power, saves algorithms, and minimizes computing time. The program runs smoothly, and the database is highly portable and easy to modify. The reliability is high and the system maintainability is good. The present invention can integrate various links of microgrid control in the fastest time through computing power integration and algorithm advantages, thereby ensuring the safe and reliable operation of the microgrid, and can quickly maintain flexible switching between grid connection and off-grid with the large grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1 This is a flow chart of a smart microgrid control method based on modular flexible control according to the present invention;

[0028] Figure 2 A flow chart of a control algorithm of a smart microgrid control method based on modular flexible control according to the present invention;

[0029] Figure 3 A schematic diagram of the control algorithm provided by the present invention corresponding to the collection of external data of the operating status of the microgrid and the instructions issued;

[0030] Figure 4 Flow chart of the control strategy of the control algorithm of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] First, if Figure 1 As shown, the present invention provides a smart microgrid control method based on modular flexible control, and the specific steps are as follows:

[0035] S1. Based on the microgrid control state, the system automatically sets parameters and configures the set parameters to the power system, grid system, load system and energy storage system, so that the microgrid can operate autonomously;

[0036] S2. During the operation of the microgrid, external data of the microgrid's operating status is obtained in real time, such as Figure 3 As shown, the external data of the microgrid's operating status obtained in real time include grid voltage, frequency, PCS operating data, PCS alarm information, BMS operating data, BMS alarm information, fire operation data, dynamic ring data, auxiliary equipment status information, safety switch status data, power supply working status data, load working status data, and the instructions issued include: PCS on-grid and off-grid switching, PCS operating power change, PCS automatic charging and discharging, safety switch disconnection, auxiliary equipment operation, safety switch automatic closing, load power change, and power supply power change.

[0037] S3, processing and analyzing the external data of the operating status of the microgrid through the control algorithm;

[0038] S4, according to the calculation results after the control algorithm processing and analysis, send instructions to the power system, power grid system, load system and energy storage system, and adjust the power system, power grid system, load system and energy storage system accordingly, such as Figure 2 As shown, the control algorithm performs the following steps based on the microgrid control strategy: obtain the external data of the operating status of the microgrid, parse and analyze the data in turn, and then perform data calculation, interact with the power system, power grid system, load system and energy storage system according to the results of the data calculation, and issue corresponding control instructions to the power system, power grid system, load system and energy storage system. After the power system, power grid system, load system and energy storage system generate corresponding actions according to the corresponding instructions, the data are fed back to the control algorithm. More specifically, as shown in FIG. Figure 4 As shown, the control algorithm implements the following control strategy:

[0039] The control algorithm collects the voltage and frequency of the microgrid, and compares the collected voltage and frequency of the microgrid with the preset voltage and frequency of the microgrid. If the collected voltage and frequency of the microgrid are higher than the preset value, the power of the power system is controlled to be reduced, the energy storage system is controlled to be automatically charged, and the load system power is manually increased. If the collected voltage and frequency of the microgrid are lower than the preset value, the power of the power system is controlled to be increased, the energy storage system is controlled to be automatically discharged, and the load system power is manually reduced. The specific steps of controlling the power reduction / increase of the power of the power system are as follows: the control algorithm sends a control instruction to the power system, and the power system safety switch automatically opens / closes to realize the power reduction / increase operation of the power system.

[0040] In order to realize the above-mentioned intelligent microgrid control method based on modular flexible control, the present invention also provides a system of the intelligent microgrid control method based on modular flexible control, which includes:

[0041] The parameter configuration unit is configured to: based on the control state of the microgrid, the system automatically sets parameters, and configures the set parameters to the power system, the grid system, the load system and the energy storage system, so that the microgrid can operate autonomously;

[0042] The data acquisition unit is configured to: acquire external data of the operation status of the microgrid in real time during the operation of the microgrid;

[0043] The data processing unit is configured to: process and analyze the external data of the operating status of the microgrid through the control algorithm, wherein the data processing unit includes a data parsing module, a data analysis module, a data calculation module, a data interaction module and a data feedback module, so as to issue instructions to the power supply system, the power grid system, the load system and the energy storage system according to the calculation results after the control algorithm processing and analysis, and correspondingly adjust the power supply system, the power grid system, the load system and the energy storage system.

[0044] The instruction issuing unit is configured to issue instructions to the power supply system, the power grid system, the load system and the energy storage system according to the calculation results after the control algorithm is processed and analyzed, and adjust the power supply system, the power grid system, the load system and the energy storage system accordingly.

[0045] In summary, this microgrid control algorithm adopts advanced modular programming ideas, and modularizes various control calculation methods, data transmission, and communication. This makes the software very flexible, scalable, and compatible. According to the different specific microgrid projects, the number of monitoring and control units can be different (several power supplies and loads). This control algorithm makes full use of the advantages of powerful computing power and advanced algorithms to quickly and timely issue instructions to subordinate monitoring and control units to ensure the smooth operation of the microgrid, maintain smooth energy exchange, and fast energy coupling and disconnection between microgrids, microgrids, and microgrids and large grids. This microgrid control algorithm has a clear data structure, rapid troubleshooting, rapid data calculation and integration, and powerful computing power.

[0046] The purpose of this invention is to provide a microgrid control calculation method, which adopts a modular approach, has various sub-functions, and can be quickly combined and dispersed according to the project situation to achieve the shortest calculation time, which has a very significant advantage for other

[0047] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A smart microgrid control method based on modular flexible control, characterized in that: Here are the steps: S1. Based on the microgrid control state, the system automatically sets parameters and configures the set parameters to the power system, grid system, load system and energy storage system, so that the microgrid can operate autonomously; S2. During the operation of the microgrid, external data of the operation status of the microgrid is obtained in real time; S3, processing and analyzing the external data of the operating status of the microgrid through the control algorithm; S4. According to the calculation results after the control algorithm is processed and analyzed, instructions are issued to the power supply system, the power grid system, the load system and the energy storage system to adjust the power supply system, the power grid system, the load system and the energy storage system accordingly.

2. According to claim 1, a smart microgrid control method based on modular flexible control is characterized in that: In step S2, the external data of the microgrid's operating status acquired in real time include grid voltage, frequency, PCS operating data, PCS alarm information, BMS operating data, BMS alarm information, fire operation data, dynamic ring data, auxiliary equipment status information, safety switch status data, power supply working status data, and load working status data.

3. The intelligent microgrid control method based on modular flexible control according to claim 1 is characterized in that: In step S4, the instructions issued include: PCS on-grid switching, PCS operating power change, PCS automatic charging and discharging, safety switch disconnection, auxiliary equipment operation, safety switch automatic closing, load power change, and power supply power change.

4. The intelligent microgrid control method based on modular flexible control according to claim 1 is characterized in that: In step S4, the control algorithm executes the following steps based on the microgrid control strategy: obtains external data on the operating status of the microgrid, parses and analyzes the data in turn, and then performs data calculation; interacts with the power system, the power grid system, the load system, and the energy storage system according to the results of the data calculation; issues corresponding control instructions to the power system, the power grid system, the load system, and the energy storage system; the power system, the power grid system, the load system, and the energy storage system generate corresponding actions according to the corresponding instructions and then feed the data back to the control algorithm.

5. The intelligent microgrid control method based on modular flexible control according to claim 1 is characterized in that: The control algorithm implements the following control strategy: The control algorithm collects the voltage and frequency of the microgrid, and compares the collected voltage and frequency of the microgrid with the preset voltage and frequency of the microgrid. If the collected voltage and frequency of the microgrid are higher than the preset value, the power of the power supply system is controlled to reduce, the energy storage system is controlled to charge automatically, and the load system power is manually increased; If the collected voltage and frequency of the microgrid are lower than the preset values, the power of the power supply system is controlled to increase, the energy storage system is controlled to discharge automatically, and the load system power is manually reduced.

6. The intelligent microgrid control method based on modular flexible control according to claim 5 is characterized in that: The specific steps of controlling the power reduction / increase of the power supply system are as follows: the control algorithm sends a control instruction to the power supply system, and the power supply system safety switch automatically opens / closes to realize the power reduction / increase operation of the power supply system.

7. A system for implementing a smart microgrid control method based on modular flexible control as claimed in any one of claims 1 to 6, comprising: The parameter configuration unit is configured to: based on the control state of the microgrid, the system automatically sets parameters, and configures the set parameters to the power system, the grid system, the load system and the energy storage system, so that the microgrid can operate autonomously; The data acquisition unit is configured to: acquire external data of the operation status of the microgrid in real time during the operation of the microgrid; The data processing unit is configured to: process and analyze the external data of the operating status of the microgrid through a control algorithm; The instruction issuing unit is configured to issue instructions to the power supply system, the power grid system, the load system and the energy storage system according to the calculation results after the control algorithm is processed and analyzed, and adjust the power supply system, the power grid system, the load system and the energy storage system accordingly.

8. The intelligent microgrid control system based on modular flexible control according to claim 1 is characterized in that: The data processing unit includes a data parsing module, a data analysis module, a data calculation module, a data interaction module and a data feedback module.

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