A method for coordinated control of energy between grids

Abstract

The present invention discloses a method for coordinated control of energy between grids. In order to overcome the problem that the energy control method in the existing power grid is difficult to achieve complete energy distribution in the power grid; the present invention adopts a divergent and orderly control method to evenly and quickly distribute the energy in the power grid between grids, achieve complete energy distribution between grids, and prevent uneven energy distribution in the power grid.

Description

Technical Field

[0001] The present invention relates to the field of energy regulation, and in particular to a method for coordinated control of energy between grids. Background Art

[0002] The existing power grid is full of various forms of new energy and clean energy, including solar energy, wind energy, fuel cells, electric vehicles, etc. These energy sources are collectively referred to as distributed energy. When a large number of distributed energy sources are integrated into the power grid, the complexity of the grid structure, energy form, power flow, information exchange and control methods will be greatly increased. Therefore, how to intelligently manage various distributed energy sources is the key technology to realize smart grid.

[0003] For example, a "system and method for controlling microgrids" disclosed in Chinese patent documents, with publication number CN101207284A, includes a patent that better realizes the control and management of microgrids by large power grids through connecting line controllers. However, the control method lacks optimization analysis of the operation of the entire network and a fast calculation method; and the control method does not consider the correction of erroneous instructions, which may cause system instability. This connecting line controller is difficult to achieve real-time control due to network delays or blockages, and cannot achieve comprehensive regulation of energy in the power grid, making it difficult to achieve the goal of stable operation of the power grid. Summary of the invention

[0004] The present invention mainly solves the problem that the energy regulation method in the existing power grid is difficult to achieve complete energy distribution in the power grid; it provides a method for coordinated energy control between grids, which adopts a divergent and orderly regulation method to evenly and quickly distribute the energy in the power grid between grids, thereby achieving complete energy distribution between grids and preventing uneven energy distribution in the power grid.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0006] The present invention includes S1: dividing grid areas, establishing a topological structure between grids, and establishing an internal structure of the grid; S2: setting energy transmission constraints according to the topological structure between grids and the internal structure of the grid, and establishing a constraint mechanism; S3: coordinating energy according to the constraint mechanism and completely distributing energy; by dividing multiple microgrids in the same grid area, it is convenient to provide a basic transmission order during energy transmission; in addition, the method sets constraint signals and adjustment mechanisms both within the grid and between grids, which can accelerate the rate of energy transmission through a divergent transmission method and achieve uniform distribution of energy.

[0007] Preferably, the S1.1: internal structure of the grid includes several microgrids and a main base station, and the microgrids are evenly distributed along the main base station to form the internal structure of the grid; each microgrid is provided with a storage facility and a base station, and the storage facility exchanges energy with the virtual energy storage provided in the main base station, and the main base station is also provided with an information exchange module, and the information exchange module exchanges information with the base station of the microgrid.

[0008] Preferably, S1.2: a single grid is connected to several grids through a main base station, and the grids are evenly arranged to form a topological structure between grids; information and energy are exchanged between grids through the main base station; the number of microgrids in each grid is limited, and the microgrids are arranged around the main base station in the grid, which can facilitate the uniform distribution of energy to the microgrids in the same grid area; and the uniform arrangement between grids can also provide a certain orderliness for energy transmission. During energy transmission, each grid receives energy and transmits the energy to the adjacent grid through signals in a certain order, providing the divergence of energy transmission.

[0009] Preferably, the S2.1: establishing a constraint mechanism for the internal structure of the grid includes the following steps: S2.1.1: the energy transmission constraints include: internal transmission constraint signals, internal transmission numbers and transmission completion signals; S2.1.2: assuming that the internal transmission constraint signal of the total base station in the grid is n, and setting internal transmission numbers for the base stations in all microgrids in the grid, which are labeled [n0,nn] in sequence; S2.1.3: when the energy transmission is not completed, the total base station in the grid sends an internal transmission constraint signal, and the base station sends an internal transmission number. After the energy transmission in the grid is completed, the total base station and the base station in the grid both send transmission completion signals.

[0010] Preferably, the S2.2: establishing a constraint mechanism between grids includes the following steps: S2.2.1: the energy transmission constraint also includes an external transmission constraint signal and an external transmission number; S2.2.2: setting an external transmission constraint signal N for the grid's main base station, and setting an external transmission number for the main base station of each grid, which are marked as [N1, Nn] in sequence; S2.2.3: when the energy transmission between grids is not completed, the main base station of the grid sends an external transmission constraint signal and an external transmission number. After the energy transmission between grids is completed, the main base station of the grid sends a transmission completion signal.

[0011] Preferably, the S3.1: energy transmission within the grid includes the following steps: S3.1.1: when energy distribution starts, energy is transmitted to the main base station of any grid, the main base station sends an internal transmission constraint signal n to the base stations of the microgrid within the grid in turn, the base stations transmit the internal transmission numbers back to the main base station in turn, the main base station transmits energy to the storage facilities inside the microgrid in turn according to the internal transmission number sequence [n0,nn], and the base station after completing the energy transmission sends a transmission completion signal to the main base station; S3.1.2: after all base stations in the grid send the transmission completion signal, energy is transmitted to the virtual energy storage of the main base station.

[0012] Preferably, the S3.2: energy transmission between grids includes the following steps: S3.2.1: after the main base station of each grid completes the energy transmission of the virtual energy storage, the main base station sends a transmission completion signal and an external transmission constraint signal N to the main base stations of all directly connected adjacent grids; S3.2.2: the main base stations of adjacent grids transmit back the external transmission numbers of their own main base stations, and transmit energy in sequence according to the steps described in S3.1 in the order of the external transmission numbers [N1, Nn]. After completing the energy transmission of one grid, the main base station of the grid sends a transmission completion signal to the main base stations of the adjacent grids.

[0013] Preferably, the S3.3: repeat step S3.2, and transmit energy to all grids in the topology structure in turn according to the mechanism of transmitting energy from grid to adjacent grid, skipping the grid that sends the transmission completion signal, to complete the complete distribution of energy.

[0014] The beneficial effects of the present invention are:

[0015] 1. The inter-grid energy coordination control method of the present invention effectively realizes the uniform and reasonable distribution of energy in the power grid by establishing energy regulation constraint mechanisms within the grid and between grids, and can prevent the problem of a single grid or microgrid being unable to allocate energy in the power grid.

[0016] 2. The inter-grid energy coordination control method of the present invention transmits energy in a divergent manner so that it is quickly transmitted in a meshed manner in the power grid, and establishes a complete constraint mechanism during the energy transmission process, which can effectively distinguish between grids that have allocated energy and grids that have not allocated energy, greatly improving the energy transmission efficiency in the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an inter-grid energy coordination control method of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0019] Example:

[0020] A method for coordinated control of energy between grids in this embodiment is as follows: Figure 1 As shown, the following steps are included:

[0021] Divide the grid area, establish the topological structure between grids, and establish the internal structure of the grid

[0022] (1) The internal structure of the grid includes a number of microgrids and a main base station. The microgrids are evenly distributed along the main base station to form the internal structure of the grid. Each microgrid is equipped with a storage facility and a base station. The storage facility exchanges energy with the virtual energy storage provided in the main base station. The main base station is also equipped with an information exchange module, which exchanges information with the base station of the microgrid.

[0023] (2) A single grid is connected to several grids through a main base station. The grids are evenly arranged to form a topological structure between grids. Information and energy are exchanged between grids through the main base station.

[0024] 2. Set energy transmission constraints based on the topological structure between grids and the internal structure of the grid, and establish a constraint mechanism

[0025] (1) Establishing a constraint mechanism for the internal structure of the grid includes the following steps:

[0026] (1-1) Energy transmission constraints include: internal transmission constraint signal, internal transmission label and transmission completion signal;

[0027] (1-2) Let the internal transmission constraint signal of the total base station in the grid be n, and set internal transmission labels for the base stations in all microgrids in the grid, labeled [n0,nn] in sequence;

[0028] (1-3) When energy transmission is not completed, the main base station in the grid sends an internal transmission constraint signal, and the base station sends an internal transmission number. After the energy transmission in the grid is completed, the main base station and the base station in the grid both send a transmission completion signal.

[0029] (2) Establishing the constraint mechanism between grids includes the following steps:

[0030] (2-1) Energy transmission constraints also include external transmission constraint signals and external transmission labels;

[0031] (2-2) Setting an external transmission constraint signal N for the total base station of the grid, and setting an external transmission label for the total base station of each grid, labeled as [N1, Nn] in sequence;

[0032] (2-3) When the energy transmission between grids is not completed, the main base station of the grid sends an external transmission constraint signal and an external transmission number. After the energy transmission between grids is completed, the main base station of the grid sends a transmission completion signal.

[0033] 3. Coordinate energy according to the constraint mechanism and fully distribute energy

[0034] (1) Energy transmission within the grid includes the following steps:

[0035] (1-1) When energy distribution begins, energy is transmitted to the main base station of any grid. The main base station sends an internal transmission constraint signal n to the base stations of the microgrids in the grid in sequence. The base stations transmit the internal transmission numbers back to the main base station in sequence. The main base station transmits energy to the storage facilities inside the microgrid in sequence according to the internal transmission number sequence [n0,nn]. After completing the energy transmission, the base station sends a transmission completion signal to the main base station.

[0036] (1-2) After all base stations in the grid send transmission completion signals, they start transmitting energy to the virtual energy storage of the main base station.

[0037] (2) Energy transmission between grids includes the following steps:

[0038] (2-1) After the main base station of each grid completes the energy transmission of the virtual energy storage, the main base station sends a transmission completion signal and an external transmission constraint signal N to the main base stations of all directly connected adjacent grids;

[0039] (2-3) The main base stations of adjacent grids transmit back the external transmission numbers of their own main base stations, and transmit energy in the order of the external transmission numbers [N1, Nn] according to the steps described in (1). After completing the energy transmission of one grid, the main base station of the grid sends a transmission completion signal to the main base station of the adjacent grid.

[0040] (3) Repeat step (2) and transfer energy to all grids in the topology in turn according to the mechanism of transmitting energy from one grid to the adjacent grid, skipping the grid that sends the transmission completion signal, and completing the complete distribution of energy.

[0041] It should be understood that the embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A method for coordinated control of energy between grids, characterized in that: include: S1: Divide the grid area, connect several grids around a single grid through a main base station, and the grids are evenly arranged to establish a topological structure between the grids; establish the internal structure of the grid, including several microgrids evenly distributed along the main base station, and each microgrid is equipped with storage facilities and base stations; S2: Energy transmission constraints are set according to the inter-grid topology and the internal structure of the grid, including internal transmission constraint signals, internal transmission labels and transmission completion signals. The internal transmission constraint signal of the total base station in the grid is set to n, and internal transmission labels are set for the base stations in all microgrids in the grid, labeled as [n0,nn] in sequence. Corresponding signals are sent during internal transmission and transmission completion, and a constraint mechanism is established for the internal structure of the grid; for the inter-grid topology, it also includes external transmission constraint signals and external transmission labels. An external transmission constraint signal N is set for the total base station of the grid, and an external transmission label is set for the total base station of each grid, labeled as [N1,Nn] in sequence, and corresponding signals are sent during external transmission and transmission completion; S3: At the beginning of energy distribution, energy is transmitted to the main base station of any grid, and energy is coordinated according to the constraint mechanism. Energy is transmitted within the grid through signal transmission and internal transmission number sequence between the main base station and the microgrid base station. After all base stations in the grid send a transmission completion signal, energy is transmitted to the virtual energy storage of the main base station. After the main base station of each grid completes the energy transmission of the virtual energy storage, it is transmitted in sequence according to the energy transmission steps within the grid through signal transmission and external transmission number sequence between the main base station and the main base station of the directly connected adjacent grid. After completing the energy transmission of one grid, the main base station of the grid sends a transmission completion signal to the main base station of the adjacent grid to completely distribute the energy.

2. The method for coordinated control of energy between grids according to claim 1, characterized in that: S1.1: The internal structure of the grid includes several microgrids and a main base station; the storage facility exchanges energy with the virtual energy storage provided inside the main base station, and the main base station is also provided with an information exchange module, which exchanges information with the base station of the microgrid.

3. The method for coordinated control of energy between grids according to claim 2, characterized in that: S1.2: A single grid is connected to several grids via a main base station, and the grids are evenly arranged to form a topological structure between grids; information and energy are exchanged between grids via the main base station.

4. The method for coordinated control of energy between grids according to claim 1 or 3, characterized in that: S2.1: Establish constraints on the internal structure of the grid The method comprises the following steps: assuming that the internal transmission constraint signal of the total base station in the grid is n, and setting internal transmission numbers for the base stations in all microgrids in the grid, which are labeled [n0,nn] in sequence; S2.1.3: when energy transmission is not completed, the total base station in the grid sends an internal transmission constraint signal, and the base station sends an internal transmission number. After the energy transmission in the grid is completed, the total base station and the base station in the grid both send transmission completion signals.

5. The method for coordinated control of energy between grids according to claim 4, characterized in that: S2.2: Establishing a constraint mechanism for the topological structure between grids includes the following steps: S2.2.1: The energy transmission constraint also includes an external transmission constraint signal and an external transmission number; S2.2.2: Setting an external transmission constraint signal N for the main base station of the grid, and setting an external transmission number for the main base station of each grid, which are labeled [N1, Nn] in sequence; S2.2.3: When the energy transmission between grids is not completed, the main base station of the grid sends an external transmission constraint signal and an external transmission number. After the energy transmission between grids is completed, the main base station of the grid sends a transmission completion signal.

6. The method for coordinated control of energy between grids according to claim 1 or 5, characterized in that: S3.1: Energy transmission within the grid includes the following steps: S3.1.1: When energy distribution begins, energy is transmitted to the main base station of any grid. The main base station sends an internal transmission constraint signal n to the base stations of the microgrid within the grid in turn. The base stations transmit the internal transmission numbers back to the main base station in turn. The main base station transmits energy to the storage facilities within the microgrid in turn according to the internal transmission number sequence [n0,nn]. After completing the energy transmission, the base station sends a transmission completion signal to the main base station; S3.1.2: After all base stations in the grid send the transmission completion signal, energy is transmitted to the virtual energy storage of the main base station.

7. The method for coordinated control of energy between grids according to claim 6, characterized in that: S3.2: The energy transmission between grids includes the following steps: S3.2.1: After the main base station of each grid completes the energy transmission of the virtual energy storage, the main base station sends a transmission completion signal and an external transmission constraint signal N to the main base stations of all directly connected adjacent grids; S3.2.2: The main base stations of adjacent grids transmit back the external transmission numbers of their own main base stations, and transmit energy in the order of the external transmission numbers [N1, Nn] in accordance with the steps described in S3.

1. After completing the energy transmission of one grid, the main base station of the grid sends a transmission completion signal to the main base stations of the adjacent grids.

8. The method for coordinated control of energy between grids according to claim 7, characterized in that: S3.3: Repeat step S3.2, and transmit energy to all grids in the topology structure in turn according to the mechanism of transmitting energy from a grid to an adjacent grid, skipping the grid that sends a transmission completion signal, and completing the complete distribution of energy.

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