CN113131461A - Distributed energy grid connection method and device based on block chain - Google Patents
Distributed energy grid connection method and device based on block chain Download PDFInfo
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Abstract
The invention is suitable for the technical field of energy Internet and provides a distributed energy grid-connected method and a distributed energy grid-connected device based on a block chain, wherein the method comprises the following steps: the virtual power plant participates in the calculation tasks of the new blocks to the distributed energy according to the calculation requirements of the optimal scheduling plan solving algorithm, and the rated forced grid-connected capacity issued by the virtual power plant is used as corresponding virtual currency excitation; the distributed energy source optimizes a grid-connection strategy based on the resulting virtual currency incentive exchange mandatory grid-connection capacity. The method and the device realize the organic linkage of the coordination control means of the virtual power plant and the independent grid-connection behavior of the distributed energy, and realize the high penetration, high freedom, high frequency and high speed grid connection of the distributed energy on the basis of ensuring the safe and reliable operation of the electric power system.
Description
Technical Field
The invention belongs to the technical field of energy Internet, and particularly relates to a distributed energy grid-connected method and device based on a block chain.
Background
Virtual Power Plants (VPPs) aggregate diversified Distributed Energy Resources (DER) to perform coordinated control and scheduling so as to meet the electric energy demand of a power system. Under the electric power market environment, the energy internet takes distributed energy as main primary energy, and under the drive of real-time electricity price, the grid-connected behavior of the distributed energy is highly permeable and highly free. Under the situation, the virtual power plant not only needs to meet the demand that massive distributed energy resources participate in the electric power market for profit in real time, but also needs to effectively control the grid-connected behavior of the distributed energy resources to ensure that the electric power system can safely and reliably run, and obviously, the virtual power plant has certain difficulty in coordination.
Disclosure of Invention
The embodiment of the invention provides a distributed energy grid-connected method and device based on a block chain, and aims to solve the problem of how to efficiently coordinate virtual power plants under the condition that massive distributed energy participates in a power market in real time and benefits each other.
First aspect
The invention provides a distributed energy grid-connected method based on a block chain, which comprises the following steps: the virtual power plant participates in the calculation tasks of the new blocks to the distributed energy according to the calculation requirements of the optimal scheduling plan solving algorithm, and the rated forced grid-connected capacity issued by the virtual power plant is used as corresponding virtual currency excitation; the distributed energy source optimizes a grid-connection strategy based on the resulting virtual currency incentive exchange mandatory grid-connection capacity.
In some embodiments, the distributed energy resource includes a small-scale distributed energy resource and a large-scale distributed energy resource.
In some embodiments, where the distributed energy resource is a small scale distributed energy resource, the optimizing a grid-tie strategy based on the resulting virtual currency incentive exchange mandatory grid-tie capacity comprises: the small-scale distributed energy source determines the grid-connected capacity in the grid-connected reference electricity price period according to the grid-connected reference electricity price and the energy of the energy storage equipment of the micro-grid in the current region; and signing a grid-connected agent contract according to the grid-connected capacity and the regional micro-grid, and settling according to an optimal scheduling plan issued by the virtual power plant according to the proportion of the small-scale distributed energy sources contributing to the virtual currency excitation.
In some embodiments, where the distributed energy resource is a large-scale distributed energy resource, the optimizing a grid-tie strategy based on the resulting virtual currency incentive exchange enforcement grid-tie capacity includes: the large-scale distributed energy is converted into mandatory grid-connected capacity through the obtained virtual currency incentive; the virtual power plant ensures that the large-scale distributed energy forced grid connection requirement is met, and the transaction electricity price of the forced grid connection capacity is the actual cost electricity price of the virtual power plant during the grid reference electricity price.
In some embodiments, where the distributed energy resource is a large-scale distributed energy resource, the optimizing a grid-tie strategy based on the resulting virtual currency incentive exchange enforcement grid-tie capacity includes: the large-scale distributed energy provides a price output bidding curve; and the virtual power plant determines the grid-connected capacity and the electricity price of the large-scale distributed energy based on the price output bidding curve.
Second aspect of the invention
The invention provides a distributed energy grid-connected device based on a block chain, which comprises: the block chain task issuing module is configured to be used for the virtual power plant to participate in issuing new block calculation tasks to the distributed energy sources according to calculation requirements of an optimal scheduling plan solving algorithm, and the rated forced grid-connected capacity issued by the virtual power plant is used as corresponding virtual currency excitation; a grid-tie optimization module configured to optimize a grid-tie strategy for the distributed energy resource based on the resulting virtual currency incentive exchange enforcement grid-tie capacity.
In some embodiments, the distributed energy resource includes a small-scale distributed energy resource and a large-scale distributed energy resource.
In some embodiments, when the distributed energy source is a small-scale distributed energy source, the grid-tie optimization module includes: the grid-connected capacity determining unit is configured to determine the grid-connected capacity in the grid-connected reference electricity price period according to the grid-connected reference electricity price and the energy of the energy storage equipment of the micro-grid in the current region by the small-scale distributed energy sources; and the grid-connected agent unit is configured to sign a grid-connected agent contract with the regional micro-grid according to the grid-connected capacity, and settle accounts according to the optimal scheduling plan issued by the virtual power plant in the proportion of the small-scale distributed energy source contribution virtual currency excitation.
In some embodiments, the grid tie optimization module comprises: a grid capacity conversion unit configured to convert the large-scale distributed energy source into a mandatory grid capacity with the obtained virtual currency incentive; and the forced grid-connection unit is configured to ensure that the virtual power plant meets the large-scale distributed energy forced grid-connection requirement, and the trading electricity price of the forced grid-connection capacity is the actual cost electricity price of the virtual power plant during the grid reference electricity price.
In some embodiments, when the distributed energy source is a large-scale distributed energy source, the grid-connected optimization module includes: a bidding curve issuing unit configured to issue a price contribution bidding curve for the large-scale distributed energy; and the bidding grid-connected unit is configured to determine the grid-connected capacity and the electricity price of the large-scale distributed energy source by the virtual power plant based on the price output bidding curve.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: according to the distributed energy grid-connected method based on the block chain, the coordination control means of the virtual power plant and the independent grid-connected behavior of the distributed energy can be organically linked through the block chain excitation mechanism, and high penetration, high freedom, high frequency and high speed grid connection of the distributed energy is achieved on the basis of ensuring safe and reliable operation of a power system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows a flowchart of a block chain-based distributed energy grid connection method provided by the present application.
Fig. 2 shows a flowchart of an embodiment of step S102 in the embodiment shown in fig. 1.
Fig. 3 shows a flowchart of another embodiment of step S102 in the embodiment shown in fig. 1 described above.
Fig. 4 shows a flowchart of a further embodiment of step S102 in the embodiment shown in fig. 1 described above.
Fig. 5 is a schematic structural diagram illustrating an embodiment of a block chain-based distributed energy grid connection device provided in the present application.
Fig. 6 is a schematic structural diagram of an embodiment of the grid-connected optimization module in the embodiment shown in fig. 5.
Fig. 7 is a schematic structural diagram of another embodiment of the grid-connected optimization module in the embodiment shown in fig. 5.
Fig. 8 is a schematic structural diagram of another embodiment of the grid-connected optimization module in the embodiment shown in fig. 5.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Method embodiment
Referring to fig. 1, a flowchart of a block chain-based distributed energy grid connection method provided by the present application is shown, and as shown in fig. 1, the block chain-based distributed energy grid connection method includes the following steps:
s101, the virtual power plant participates in issuing a calculation task of a new block to the distributed energy according to the calculation requirement of an optimal scheduling plan solving algorithm, and rated forced grid-connected capacity issued by the virtual power plant is used as corresponding virtual currency excitation;
and S102, optimizing a grid-connected strategy by the distributed energy source based on the obtained virtual currency incentive exchange mandatory grid-connected capacity.
Specifically, the distributed energy source includes a small-scale distributed energy source and a large-scale distributed energy source. The method comprises the following steps that small-scale distributed energy in a region governed by a virtual power plant is subjected to geographic position as constraint, and a regional micro-grid is formed through a power electronic technology to participate in grid connection in a unified manner; for large-scale distributed energy in the area governed by the virtual power plant, coordination control and grid connection are mainly carried out through the virtual power plant. Generally, the regional micro-grid can also be used as a large-scale distributed energy source, and is coordinated and controlled by a virtual power plant together with the large-scale distributed energy source.
In some exemplary embodiments, referring specifically to fig. 2, a flowchart of an embodiment of step S102 in the embodiment shown in fig. 1 is shown.
As shown in fig. 2, when the distributed energy is a small-scale distributed energy, in the step S102, the optimizing a grid-connection policy by the distributed energy based on the obtained virtual currency incentive exchange mandatory grid-connection capacity may specifically include the following steps:
s201, the small-scale distributed energy source determines the grid-connected capacity in the grid-connected reference electricity price period according to the grid-connected reference electricity price and the energy of the energy storage equipment of the micro-grid in the current region.
Specifically, the real-time electricity price period released by the electric power market is T, and the electricity price updating interval is delta T. Before the moment of issuing the real-time electricity price, the electric power market issues a real-time electricity price sequence, wherein the grid-connected reference electricity price in the next delta t time period is the cost electricity price when no distributed energy is connected in the area, and each distributed energy source makes a corresponding grid-connected strategy according to the grid-connected reference electricity price.
Because the small-scale distributed energy can form the regional micro-grid through the power technology to improve the management efficiency, the grid-connected capacity can be determined according to the energy of the energy storage device of the current regional micro-grid within the grid reference electricity price updating interval period.
And S202, signing a grid-connected agent contract according to the grid-connected capacity and the regional micro-grid, and settling according to an optimal scheduling plan issued by the virtual power plant according to the proportion of the small-scale distributed energy sources contributing to the virtual currency excitation.
Specifically, the small-scale distributed energy resources deliver the grid-connected capacity strategy to the regional microgrid for execution in a proxy mode, and can be agreed as follows: the grid-connected capacity of the regional micro-grid at the moment before the real-time electricity price sequence is released after the upper limit of the grid-connected capacity of the small-scale distributed energy is reached, the grid-connected strategy of the regional micro-grid is approved, and settlement is carried out according to the optimal scheduling plan released by the virtual power plant and the proportion of contribution of the small-scale distributed energy to virtual currency excitation.
By the aid of the method and the device, free and efficient optimization of grid-connected operation of small-scale distributed energy can be achieved.
In some exemplary embodiments, referring specifically to fig. 3, a flowchart of an embodiment of step S102 in the embodiment shown in fig. 1 is shown.
As shown in fig. 3, when the distributed energy is a large-scale distributed energy, in the step S102, the optimizing a grid-connection policy by the distributed energy based on the obtained virtual currency incentive exchange mandatory grid-connection capacity may specifically include the following steps:
s301, the large-scale distributed energy sources are converted into mandatory grid capacity through the obtained virtual currency incentive.
In particular, the large-scale distributed energy source may include the regional microgrid described above.
Additionally, when converting the grid-tied capacity based on the resulting virtual currency incentive, the accounting rights for the blockchain include accounting rights for the virtual currency incentive transaction data and the blocktechnology data. The transaction data accounting refers to the transaction data generated by exchanging forced grid-connected capacity from large-scale distributed energy sources to a virtual power plant by virtual currency excitation before distributed computing starts, and recording the transaction data into a block chain by the virtual power plant; and the block technical data accounting means that after distributed computing is started, technical data generated in the consensus process of the new block is found and is recorded into a block chain by the virtual power plant to serve as an excitation distribution basis of the block.
S302, the virtual power plant ensures that the large-scale distributed energy forced grid connection requirement is met, and the transaction electricity price of the forced grid connection capacity is the actual cost electricity price of the virtual power plant during the grid reference electricity price.
The scheme of the embodiment allows forced synchronization through virtual currency excitation, so that the value of an excitation mechanism is fully exerted.
In some exemplary embodiments, referring specifically to fig. 4, a flowchart of an embodiment of step S102 in the embodiment shown in fig. 1 is shown.
As shown in fig. 4, when the distributed energy is a large-scale distributed energy, in step S102, the optimizing a grid-connection policy by the distributed energy based on the obtained virtual currency incentive exchange mandatory grid-connection capacity may specifically include the steps of:
s401, the large-scale distributed energy sources propose a price output bidding curve;
s402, the virtual power plant determines grid-connected capacity and electricity price of the large-scale distributed energy source based on the price output bidding curve.
The embodiment realizes the free bidding principle of large-scale distributed energy, is used for supplementing the grid-connected principle except for the virtual currency excitation, and is an effective grid-connected coordination mechanism if the grid-connected capacity of the virtual currency excitation is still vacant and the bidding grid-connected is carried out.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Product examples
Based on the same inventive concept as the method embodiment, correspondingly, the embodiment also provides a distributed energy grid-connected device based on the block chain.
Referring to fig. 5, a schematic structural diagram of an embodiment of the block chain-based distributed energy grid connection device provided in the present application is shown, and as shown in fig. 5, the block chain-based distributed energy grid connection device 500 includes: the block chain task issuing module 501 is configured to allow the virtual power plant to participate in issuing new block calculation tasks to the distributed energy sources according to calculation requirements of an optimal scheduling plan solving algorithm, and take rated forced grid-connection capacity issued by the virtual power plant as corresponding virtual currency excitation; a grid-tie optimization module 502 configured to optimize a grid-tie strategy based on the resulting virtual currency incentive exchange enforcement grid-tie capacity by the distributed energy resource.
Referring to fig. 6, a schematic structural diagram of an embodiment of the grid-connected optimization module 502 in the embodiment shown in fig. 5 is shown.
As shown in fig. 6, when the distributed energy resource is a small-scale distributed energy resource, the grid-connection optimization module 502 includes: the grid-connected capacity determining unit 601 is configured to determine the grid-connected capacity in the grid-connected reference electricity price period according to the grid-connected reference electricity price and the energy of the energy storage equipment of the micro-grid in the current region by the small-scale distributed energy sources; and a grid-connected agent unit 602 configured to sign a grid-connected agent contract with the regional microgrid according to the grid-connected capacity, and to settle accounts according to an optimal scheduling plan issued by the virtual power plant in a proportion of the small-scale distributed energy sources contributing to the virtual currency excitation.
Referring to fig. 7, a schematic structural diagram of another embodiment of the grid-connected optimization module 502 in the embodiment shown in fig. 5 is shown.
As shown in fig. 7, when the distributed energy is a large-scale distributed energy, the grid-connected optimization module 502 includes: a grid-connected capacity exchange unit 701 configured to exchange the large-scale distributed energy source for mandatory grid-connected capacity with the obtained virtual currency incentive; a grid forcing unit 702 configured to ensure that the virtual power plant satisfies the large-scale distributed energy grid forcing requirement, wherein a trade price of the grid forcing capacity is an actual cost price of the virtual power plant during a grid reference price.
Referring to fig. 8, a schematic structural diagram of another embodiment of the grid-connected optimization module 502 in the embodiment shown in fig. 5 is shown.
As shown in fig. 8, when the distributed energy is a large-scale distributed energy, the grid-connected optimization module 502 includes: a bidding curve issuing unit 801 configured to issue a price contribution bidding curve for the large-scale distributed energy; and a bidding grid-connection unit 802 configured to determine the grid-connection capacity and the electricity price of the large-scale distributed energy source by the virtual power plant based on the price output bidding curve.
Wherein, in each of the above exemplary embodiments, the distributed energy resource includes a small-scale distributed energy resource and a large-scale distributed energy resource.
In summary, the distributed energy grid-connected method based on the block chain can organically link the coordination control means of the virtual power plant and the independent grid-connected behavior of the distributed energy through the block chain excitation mechanism, and realizes high penetration, high freedom, high frequency and high-speed grid connection of the distributed energy on the basis of ensuring safe and reliable operation of the power system.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A distributed energy grid connection method based on a block chain is characterized by comprising the following steps:
the virtual power plant participates in the calculation tasks of the new blocks to the distributed energy according to the calculation requirements of the optimal scheduling plan solving algorithm, and the rated forced grid-connected capacity issued by the virtual power plant is used as corresponding virtual currency excitation;
the distributed energy source optimizes a grid-connection strategy based on the resulting virtual currency incentive exchange mandatory grid-connection capacity.
2. The block chain-based distributed energy grid connection method according to claim 1, wherein the distributed energy includes small-scale distributed energy and large-scale distributed energy.
3. The block chain-based distributed energy grid connection method according to claim 2, wherein when the distributed energy is small-scale distributed energy, the optimizing the grid connection strategy by the distributed energy based on the obtained virtual currency incentive exchange mandatory grid connection capacity comprises:
the small-scale distributed energy source determines the grid-connected capacity in the grid-connected reference electricity price period according to the grid-connected reference electricity price and the energy of the energy storage equipment of the micro-grid in the current region;
and signing a grid-connected agent contract according to the grid-connected capacity and the regional micro-grid, and settling according to an optimal scheduling plan issued by the virtual power plant according to the proportion of the small-scale distributed energy sources contributing to the virtual currency excitation.
4. The block chain-based distributed energy grid connection method according to claim 2, wherein when the distributed energy is large-scale distributed energy, the optimizing the grid connection strategy by the distributed energy based on the obtained virtual currency incentive exchange mandatory grid connection capacity comprises:
the large-scale distributed energy is converted into mandatory grid-connected capacity through the obtained virtual currency incentive;
the virtual power plant ensures that the large-scale distributed energy forced grid connection requirement is met, and the transaction electricity price of the forced grid connection capacity is the actual cost electricity price of the virtual power plant during the grid reference electricity price.
5. The block chain-based distributed energy grid connection method according to claim 2, wherein when the distributed energy is large-scale distributed energy, the optimizing the grid connection strategy by the distributed energy based on the obtained virtual currency incentive exchange mandatory grid connection capacity comprises:
the large-scale distributed energy provides a price output bidding curve;
and the virtual power plant determines the grid-connected capacity and the electricity price of the large-scale distributed energy based on the price output bidding curve.
6. The utility model provides a distributed energy is incorporated into power networks device based on block chain which characterized in that includes:
the block chain task issuing module is configured to be used for the virtual power plant to participate in issuing new block calculation tasks to the distributed energy sources according to calculation requirements of an optimal scheduling plan solving algorithm, and the rated forced grid-connected capacity issued by the virtual power plant is used as corresponding virtual currency excitation;
a grid-tie optimization module configured to optimize a grid-tie strategy for the distributed energy resource based on the resulting virtual currency incentive exchange enforcement grid-tie capacity.
7. The block chain-based distributed energy grid connection apparatus according to claim 6, wherein the distributed energy includes small-scale distributed energy and large-scale distributed energy.
8. The block chain-based distributed energy grid connection device according to claim 7, wherein when the distributed energy is small-scale distributed energy, the grid connection optimization module includes:
the grid-connected capacity determining unit is configured to determine the grid-connected capacity in the grid-connected reference electricity price period according to the grid-connected reference electricity price and the energy of the energy storage equipment of the micro-grid in the current region by the small-scale distributed energy sources;
and the grid-connected agent unit is configured to sign a grid-connected agent contract with the regional micro-grid according to the grid-connected capacity, and settle accounts according to the optimal scheduling plan issued by the virtual power plant in the proportion of the small-scale distributed energy source contribution virtual currency excitation.
9. The block chain-based distributed energy grid connection method according to claim 7, wherein when the distributed energy is large-scale distributed energy, the grid connection optimization module includes:
a grid capacity conversion unit configured to convert the large-scale distributed energy source into a mandatory grid capacity with the obtained virtual currency incentive;
and the forced grid-connection unit is configured to ensure that the virtual power plant meets the large-scale distributed energy forced grid-connection requirement, and the trading electricity price of the forced grid-connection capacity is the actual cost electricity price of the virtual power plant during the grid reference electricity price.
10. The block chain-based distributed energy grid connection method according to claim 7, wherein when the distributed energy is large-scale distributed energy, the grid connection optimization module includes:
a bidding curve issuing unit configured to issue a price contribution bidding curve for the large-scale distributed energy;
and the bidding grid-connected unit is configured to determine the grid-connected capacity and the electricity price of the large-scale distributed energy source by the virtual power plant based on the price output bidding curve.
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| CN104935007A (en) * | 2015-06-16 | 2015-09-23 | 国网天津市电力公司 | Control method for gird-connected operation of distributed power supply |
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