CN117318056A - Virtual power plant participation auxiliary service regulation and control method and device based on interconnected micro-grid - Google Patents
Virtual power plant participation auxiliary service regulation and control method and device based on interconnected micro-grid Download PDFInfo
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Abstract
A method and a device for regulating and controlling auxiliary services of virtual power plants based on interconnected micro-grids are provided, wherein the method comprises the following steps: taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration, and taking the minimum total running cost of the day before as a target, establishing a day before scheduling model of the virtual power plant to obtain time-sharing reference electricity consumption and adjustable capacity of the virtual power plant; the power grid transmits an adjusting signal to the virtual power plant according to the real-time running condition, and the virtual power plant distributes the adjusting signal to the micro-power grid with the aim of minimizing the total real-time electricity consumption cost; based on the distributed adjusting signals, the micro-grid establishes a real-time energy rolling optimization model with the aim of predicting the minimum total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in the time domain, and an optimal scheduling scheme of the distributed generator set and the energy storage system is obtained. The invention can obviously improve the energy benefit of the micro-grid and meet the real-time regulation requirement of the grid.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a virtual power plant participation auxiliary service regulation and control method and device based on an interconnected micro-grid.
Background
The micro-grid is an effective means for promoting the large-scale access of distributed new energy and realizing the reliable supply of various energy forms for loads. However, the uncertainty of new energy generation in a single micro grid increases its running cost, and there is insufficient capacity to provide auxiliary services to the grid to gain economic benefit. A plurality of interconnected micro-grids form a virtual power plant, auxiliary services are provided for the power system through dynamic aggregation and optimization coordination, and the reliability and energy benefit of the micro-grids can be remarkably improved.
The existing research mainly considers that a plurality of micro-grids perform centralized energy management and participate in an electric energy market through forming a virtual power plant, and omits the virtual power plant based on the interconnected micro-grids to provide quick and flexible auxiliary services for a power system. In the future, the requirement of the power system on flexible adjustment resources is continuously increased towards the dual uncertainties of new energy output on the source side and electricity demand on the charge side. Therefore, it is necessary to consider that the virtual power plant composed of interconnected micro-grids provides flexible regulation capability for the grid by participating in the auxiliary service market, and obtain economic benefits.
Disclosure of Invention
The invention aims to overcome the defects and problems in the prior art, and provides a method and a device for regulating and controlling the participation auxiliary service of a virtual power plant based on an interconnected micro-grid, which aim to solve the problem that the conventional method for optimizing the energy of the virtual power plant based on the interconnected micro-grid omits to provide auxiliary service for the grid.
In order to achieve the above object, the technical solution of the present invention is: a virtual power plant participation auxiliary service regulation and control method based on an interconnected micro-grid comprises the following steps:
taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration, and taking the minimum total running cost of the day before as a target, establishing a day before scheduling model of the virtual power plant to obtain time-sharing reference electricity consumption and adjustable capacity of the virtual power plant;
the power grid transmits an adjusting signal to the virtual power plant according to the real-time running condition, and the virtual power plant distributes the adjusting signal to the micro-power grid with the aim of minimizing the total real-time electricity consumption cost;
based on the distributed adjusting signals, the micro-grid establishes a real-time energy rolling optimization model with the aim of predicting the minimum total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in the time domain, and an optimal scheduling scheme of the distributed generator set and the energy storage system is obtained.
The objective function of the virtual power plant day-ahead scheduling model is as follows:
；
in the method, in the process of the invention,for period->Price of virtual power plant purchasing electricity from the grid; />For period->Reference electricity consumption of the virtual power plant; />And->Respectively representing the total number of distributed generator sets and energy storage systems in the virtual power plant; />Is->The distributed generator sets are in time slot->Is not limited by the operating cost of (a); />Is->Total call amount of each energy storage system operation day;is a cost factor for energy storage systems.
The operation characteristics of the distributed generator set are as follows:
；
；
in the method, in the process of the invention,、/>and->Is->The power generation cost coefficients of the distributed generator sets; />Is->The distributed generator sets are in time slot->Is a power generation system; />And->Respectively +.>And the upper limit and the lower limit of the power generation power of the distributed generator sets.
The operation characteristics of the energy storage system are as follows:
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；
；
；
；
in the method, in the process of the invention,is->The energy storage system is at the time interval->Is a state of charge of (2); />Is->Initial states of charge of the energy storage systems; />Is->The energy storage system is at the time interval->Is used for the charge and discharge power of the battery,indicating charging->Indicating discharge; />The charge and discharge cost coefficients of the energy storage system; />Is the charge and discharge power; />For period->Is a time interval of (2); />Is the capacity of the energy storage system; />Andrespectively +.>Upper and lower limits of charge and discharge power of the energy storage systems; />And->Respectively +.>And the upper and lower limits of the charge states of the energy storage systems.
The time-sharing reference electricity consumption and the adjustable capacity of the virtual power plant are respectively as follows:
；
；
in the method, in the process of the invention,for virtual power plant in period->Is used for the total electricity load of the electric car; />Predicting the generated power of the photovoltaic system; />Is adjustable capacity; />Maximum virtual power plant for all appliances onAnd (5) using an electric load.
The power grid sends an adjusting signal to the virtual power plant according to the real-time operation condition, wherein the adjusting signal comprises the following steps:
；
in the method, in the process of the invention,for time->A dimensionless adjustment signal;
the optimization model for distributing the adjusting signals to the micro-grid by the virtual power plant with the aim of minimizing the real-time total electricity consumption cost is as follows:
；
；
in the method, in the process of the invention,the number of interconnected micro-grids in the virtual power plant; />Is->The individual micro-grids are at time->The allocated regulated power; />Is->The individual micro-grids are at time->Is a unit electricity cost of (a).
Said firstThe individual micro-grids are at time->Cost per unit of electricity->The method comprises the following steps:
；
；
in the method, in the process of the invention,a fixed price for a single micro grid to purchase electricity from the grid; />Unit cost for self-generation of a single microgrid; />Is->The individual micro-grids are at time->Is used for the electric load of the (a); />For the moment of timeIs a ratio of supply to demand of (a).
The objective function of the real-time energy rolling optimization model of the micro-grid is as follows:
；
in the method, in the process of the invention,is the step length in the prediction time domain; />Checking a cost coefficient for adjusting the deviation; />For the moment of timeIs adjusted for deviation; />And->Respectively +.>The number of distributed generator sets and energy storage systems in the micro-grid; />For micro-grid->The individual distributed generator sets are at the moment +.>Is a power generation cost of the (a); />For the whole prediction time domain +.>The use of the individual energy storage systems;
time of dayDeviation of regulation of->The method comprises the following steps:
；
in the method, in the process of the invention,is->First->Generating power of the distributed generator set;is->Charging and discharging power of the energy storage systems; />Predicting the output of the photovoltaic system;is an electrical load.
Constraint conditions of the micro-grid real-time energy rolling optimization model comprise generation power constraint, climbing constraint and charge-discharge power constraint and state-of-charge constraint of the energy storage system of the distributed generator set.
A virtual power plant participation auxiliary service regulation device based on an interconnected micro-grid, the device being applied to the method, the device comprising:
the virtual power plant day-ahead scheduling model building module is used for building a virtual power plant day-ahead scheduling model by taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration and taking the minimum day-ahead total running cost as a target to obtain time-sharing reference electricity consumption and adjustable capacity of the virtual power plant;
the micro-grid distribution regulation signal acquisition module is used for the power grid to distribute regulation signals to the virtual power plant according to the real-time operation condition, and the virtual power plant distributes the regulation signals to the micro-grid with the aim of minimizing the real-time total electricity consumption cost;
the optimal scheduling scheme acquisition module is used for establishing a real-time energy rolling optimization model of the micro-grid to obtain an optimal scheduling scheme of the distributed generator set and the energy storage system based on the distributed adjusting signals and aiming at minimizing the total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in a prediction time domain.
Compared with the prior art, the invention has the beneficial effects that:
according to the method and the device for regulating and controlling the participation auxiliary service of the virtual power plant based on the interconnected micro-grids, the energy benefit of the whole virtual power plant formed by a plurality of interconnected micro-grids can be improved through daily and real-time two-stage optimization regulation and control, meanwhile, flexible and rapid-response auxiliary service can be provided for the grids, and compared with the prior art, the whole optimization regulation and control method is more perfect, reasonable and close to reality. Therefore, the invention not only can obviously improve the energy benefit of the micro-grid, but also can meet the real-time regulation requirement of the grid.
Drawings
FIG. 1 is a flow chart of a method for regulating and controlling participation auxiliary services of a virtual power plant based on an interconnected micro-grid.
FIG. 2 is a schematic diagram of a virtual power plant framework based on interconnected micro-grids in an embodiment of the invention.
Fig. 3 is a block diagram of a device for controlling a virtual power plant participation auxiliary service based on an interconnected micro-grid.
Fig. 4 is a block diagram of a virtual power plant participation auxiliary service regulation device based on an interconnected micro-grid.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1, a method for controlling participation auxiliary services of a virtual power plant based on an interconnected micro-grid includes:
s1, taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration, and establishing a daily scheduling model of the virtual power plant by taking the minimum daily total running cost as a target to obtain the time-sharing reference electricity consumption and the adjustable capacity of the virtual power plant.
Referring to fig. 2, a plurality of interconnected micro-grids form a virtual power plant to provide auxiliary services for the power grid, wherein each micro-grid comprises a distributed generator set, a photovoltaic system, an energy storage system and a load, the virtual power plant performs daily optimization scheduling of all controllable resources with the minimum total running cost as a target, and an objective function of a scheduling model is as follows:
；
in the method, in the process of the invention,for period->Price of virtual power plant purchasing electricity from the grid; />For period->Reference electricity consumption of the virtual power plant; />And->Respectively representing the total number of distributed generator sets and energy storage systems in the virtual power plant; />Is->The distributed generator sets are in time slot->Is not limited by the operating cost of (a); />Is->Total call amount of each energy storage system operation day;is a cost factor for energy storage systems.
The operation characteristics of the distributed generator set are as follows:
；
；
in the method, in the process of the invention,、/>and->Is->The power generation cost coefficients of the distributed generator sets; />Is->The distributed generator sets are in time slot->Is a power generation system; />And->Respectively +.>And the upper limit and the lower limit of the power generation power of the distributed generator sets.
Total time-sharing power generation power of all photovoltaic systems in virtual power plant by adopting cyclic neural network modelAnd predicting, wherein a prediction model is as follows:
。
the operating characteristics of the energy storage system are:
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in the method, in the process of the invention,is->Personal storeThe energy system is at the%>Is a state of charge of (2); />Is->Initial states of charge of the energy storage systems; />Is->The energy storage system is at the time interval->Is used for the charge and discharge power of the battery,indicating charging->Indicating discharge; />The charge and discharge cost coefficients of the energy storage system; />Is the charge and discharge power; />For period->Is a time interval of (2); />Is the capacity of the energy storage system; />Andrespectively +.>Upper and lower limits of charge and discharge power of the energy storage systems; />And->Respectively +.>And the upper and lower limits of the charge states of the energy storage systems.
Time-sharing reference electricity consumption of virtual power plant obtained by power balanceThe method comprises the following steps:
；
in the method, in the process of the invention,for virtual power plant in period->Is used for the total electricity load of the electric car; />Is->The distributed generator sets are in time slot->Is a power generation system; />Is->The energy storage systems are inPeriod->Charging and discharging power of (2); />And predicting the generated power of the photovoltaic system.
According to time-sharing reference electricity consumptionThe virtual power plant adjusts the capacity upwards toDown regulating capacity to +.>The virtual power plant is then in period->The adjustment capacity of (2) is:
；
in the method, in the process of the invention,is adjustable capacity; />And (5) the maximum electricity load of the virtual power plant when all the electric appliances are started.
According to the day-ahead optimal scheduling result, the virtual power plant reports the time-sharing reference electricity consumption to the power gridAnd regulating capacity->。
S2, the power grid transmits an adjusting signal to the virtual power plant according to the real-time operation condition, and the virtual power plant distributes the adjusting signal to the micro-power grid with the aim of minimizing the total real-time electricity consumption cost.
In real-time operation, the power grid sends an adjusting signal to the virtual power plant every 5 minutes for a period of timeThe adjustment signal of (2) is:
；
in the method, in the process of the invention,for time->A dimensionless adjustment signal;
the virtual power plant then splits the regulation signal to each micro-grid, ifThe regulated power allocated to the individual micro-grids is +.>The electric load is +.>Supply/demand ratio->The method comprises the following steps:
；
in general, the micro-grid uses internal power generation resources to supply power at lower cost than purchasing power from the grid according to the supply-demand ratioFirst->The unit electricity price of each micro-grid is as follows:
；
in the method, in the process of the invention,a fixed price for a single micro grid to purchase electricity from the grid; />Unit cost for self-generation of electricity for a single microgrid. In particular, when->When (I)>The regulating power of the micro-grid is 0, and the electricity cost is +.>The method comprises the steps of carrying out a first treatment on the surface of the When (when)When (I)>The electric loads of the micro-grid are all +.>Providing; when (when)When the power is regulated to be larger than the power load, the redundant electric quantity is charged and balanced by the energy storage system.
At the moment of timeThe optimal model for the virtual power plant to distribute the regulating signals to the micro-grid with the aim of minimizing the real-time total electricity cost is as follows:
；
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in the method, in the process of the invention,the number of interconnected micro-grids in the virtual power plant; />Is->The individual micro-grids are at time->The allocated regulated power; />Is->The individual micro-grids are at time->Is a unit electricity cost of (a).
First, theThe individual micro-grids are at time->Cost per unit of electricity->The method comprises the following steps:
；
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in the method, in the process of the invention,is->The individual micro-grids are at time->Is used for the electric load of the (a);for time->Is a ratio of supply to demand of (a).
And S3, based on the distributed adjusting signals, the micro-grid is built with the aim of predicting the minimum total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in the time domain, and an optimal scheduling scheme of the distributed generator set and the energy storage system is obtained by building a real-time energy rolling optimization model of the micro-grid.
Micro-grid at timeReceiving a real-time control signal for the allocation of a virtual power plant>Then, an autoregressive moving average model is adopted to estimate the distributed regulating signals in the prediction time domain and the power generation of the photovoltaic system, and then real-time rolling optimization is carried out, namely +.>The individual micro-grids are at time->The objective function of the real-time energy rolling optimization model is as follows:
；
in the method, in the process of the invention,is the step length in the prediction time domain; />Checking a cost coefficient for adjusting the deviation; />For the moment of timeIs adjusted for deviation; />And->Respectively +.>The number of distributed generator sets and energy storage systems in the micro-grid; />For micro-grid->The individual distributed generator sets are at the moment +.>Is a power generation cost of the (a); />For the whole prediction time domain +.>The use of the individual energy storage systems;
time of dayDeviation of regulation of->The method comprises the following steps:
；
in the method, in the process of the invention,is->First->Generating power of the distributed generator set;is->Charging and discharging power of the energy storage systems; />Predicting the output of the photovoltaic system;is an electrical load.
Constraint conditions of the real-time energy rolling optimization model of the micro-grid comprise generation power constraint, climbing constraint and charge-discharge power constraint and state-of-charge constraint of the energy storage system of the distributed generator set.
First, theFirst->The operation and constraint modeling of the individual energy storage systems in the whole prediction domain is as follows:
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in the method, in the process of the invention,is->First->The individual energy storage systems are at the moment->Is a state of charge of (2);the initial state of charge at the current moment; />Is the capacity of the energy storage system;and->Respectively +.>First->Upper and lower limits of charge and discharge power of the energy storage systems;and->Respectively +.>Upper and lower limits of the states of charge of the energy storage systems.
First, theFirst->The individual distributed generator sets are at the moment +.>The power generation cost and the operation constraint of (a) are as follows:
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in the method, in the process of the invention,and->Is->First->Upper and lower limits of the power generated by the distributed generator sets; />For each ofThe period maximum uphill and downhill climbing capability is a percentage of the maximum minimum power.
Referring to fig. 3, the invention further provides a device for regulating and controlling the auxiliary service of the virtual power plant participation based on the interconnection micro-grid, which is applied to the method for regulating and controlling the auxiliary service of the virtual power plant participation based on the interconnection micro-grid, and the device comprises the following steps:
the virtual power plant day-ahead scheduling model building module is used for building a virtual power plant day-ahead scheduling model by taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration and taking the minimum day-ahead total running cost as a target to obtain time-sharing reference electricity consumption and adjustable capacity of the virtual power plant;
the micro-grid distribution regulation signal acquisition module is used for the power grid to distribute regulation signals to the virtual power plant according to the real-time operation condition, and the virtual power plant distributes the regulation signals to the micro-grid with the aim of minimizing the real-time total electricity consumption cost;
the optimal scheduling scheme acquisition module is used for establishing a real-time energy rolling optimization model of the micro-grid to obtain an optimal scheduling scheme of the distributed generator set and the energy storage system based on the distributed adjusting signals and aiming at minimizing the total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in a prediction time domain.
Referring to fig. 4, the invention further provides a virtual power plant participation auxiliary service regulation device based on the interconnected micro-grid, which comprises a memory and a processor;
the memory is used for storing computer program codes and transmitting the computer program codes to the processor;
the processor is used for executing the virtual power plant participation auxiliary service regulation method based on the interconnection micro-grid according to the instructions in the computer program code.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with a computer program, and the computer program realizes the method for regulating and controlling the participation of the virtual power plant in the auxiliary service based on the interconnection micro-grid when being executed by the processor.
In general, the computer instructions to implement the methods of the present invention may be carried in any combination of one or more computer-readable storage media. The non-transitory computer-readable storage medium may include any computer-readable medium, except the signal itself in temporary propagation.
The computer readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAn), a read-only memory (ROn), an erasable programmable read-only memory (EKROn or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROn), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer program code for carrying out operations of the present invention may be written in one or more programming languages, or combinations thereof, including an object oriented programming language such as Java, snalltalk, C ++ and conventional procedural programming languages, such as the "C" language or similar programming languages, particularly Kython languages suitable for neural network computing and TensorFlow, kyTorch-based platform frameworks may be used. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any number of types of networks, including a Local Area Network (LAN) or a Wide Area Network (WAN), or be connected to an external computer (for example, through the Internet using an Internet service provider).
The above devices and non-transitory computer readable storage medium may refer to a specific description of a method for controlling the participation of a virtual power plant in auxiliary services based on an interconnected micro-grid, and the beneficial effects thereof will not be described herein.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. The utility model provides a virtual power plant participation auxiliary service regulation and control method based on interconnection micro-grid, which is characterized by comprising the following steps:
taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration, and taking the minimum total running cost of the day before as a target, establishing a day before scheduling model of the virtual power plant to obtain time-sharing reference electricity consumption and adjustable capacity of the virtual power plant;
the power grid transmits an adjusting signal to the virtual power plant according to the real-time running condition, and the virtual power plant distributes the adjusting signal to the micro-power grid with the aim of minimizing the total real-time electricity consumption cost;
based on the distributed adjusting signals, the micro-grid establishes a real-time energy rolling optimization model to obtain an optimal scheduling scheme of the distributed generator set and the energy storage system, wherein the objective of minimizing the total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in the prediction time domain is to establish the micro-grid;
the objective function of the real-time energy rolling optimization model of the micro-grid is as follows:
；
in the method, in the process of the invention,is the step length in the prediction time domain; />Checking a cost coefficient for adjusting the deviation; />For time->Is adjusted for deviation; />And->Respectively +.>The number of distributed generator sets and energy storage systems in the micro-grid;for micro-grid->The individual distributed generator sets are at the moment +.>Is a power generation cost of the (a); />Is a cost coefficient of the energy storage system; />For the whole prediction time domain +.>The use of the individual energy storage systems;
time of dayDeviation of regulation of->The method comprises the following steps:
；
in the method, in the process of the invention,is->First->Generating power of the distributed generator set;is->Charging and discharging power of the energy storage systems; />Predicting the output of the photovoltaic system;is->The individual micro-grids are at time->The allocated regulated power; />Is an electrical load.
2. The method for regulating and controlling the participation assistance services of the virtual power plant based on the interconnected micro-grid according to claim 1, wherein an objective function of a daily scheduling model of the virtual power plant is as follows:
；
in the method, in the process of the invention,for period->Price of virtual power plant purchasing electricity from the grid; />For period->Reference electricity consumption of the virtual power plant; />And->Respectively representing the total number of distributed generator sets and energy storage systems in the virtual power plant; />Is the firstThe distributed generator sets are in time slot->Is not limited by the operating cost of (a); />Is->Total call amount of each energy storage system operation day; />Is a cost factor for energy storage systems.
3. The method for regulating and controlling the participation auxiliary service of the virtual power plant based on the interconnected micro-grid according to claim 1, wherein the operation characteristics of the distributed generator set are as follows:
；
；
in the method, in the process of the invention,is->The distributed generator sets are in time slot->Is not limited by the operating cost of (a); />、/>And->Is->The power generation cost coefficients of the distributed generator sets; />Is->The distributed generator sets are in time slot->Is a power generation system;and->Respectively +.>And the upper limit and the lower limit of the power generation power of the distributed generator sets.
4. The method for regulating and controlling the participation auxiliary service of a virtual power plant based on an interconnected micro-grid according to claim 1, wherein the operation characteristics of the energy storage system are as follows:
；
；
；
；
；
in the method, in the process of the invention,is->Total call amount of each energy storage system operation day; />Is->The energy storage system is at the time interval->Is a state of charge of (2); />Is->Initial states of charge of the energy storage systems; />Is->The energy storage system is at the time interval->Charging and discharging power, < >>Indicating charging->Indicating discharge; />The charge and discharge cost coefficients of the energy storage system; />Is the charge and discharge power; />For period->Is a time interval of (2); />Is the capacity of the energy storage system; />And->Respectively +.>Upper and lower limits of charge and discharge power of the energy storage systems; />Andrespectively +.>And the upper and lower limits of the charge states of the energy storage systems.
5. The method for regulating and controlling the participation auxiliary service of the virtual power plant based on the interconnected micro-grid according to claim 1, wherein the time-sharing reference electricity consumption and the adjustable capacity of the virtual power plant are respectively as follows:
；
；
in the method, in the process of the invention,for period->Reference electricity consumption of the virtual power plant; />For virtual power plant in period->Is used for the total electricity load of the electric car; />Is->The distributed generator sets are in time slot->Is a power generation system; />Is->The energy storage system is at the time interval->Charging and discharging power of (2); />Predicting the generated power of the photovoltaic system; />And->Respectively representing the total number of distributed generator sets and energy storage systems in the virtual power plant; />Is adjustable capacity; />The maximum electricity load of the virtual power plant when all the electric appliances are started; />Is->And the upper limit of the charge and discharge power of the energy storage system.
6. The method for regulating and controlling the participation auxiliary service of a virtual power plant based on an interconnected micro-grid according to claim 1,
the power grid sends an adjusting signal to the virtual power plant according to the real-time operation condition, wherein the adjusting signal comprises the following steps:
；
in the method, in the process of the invention,for period->Reference electricity consumption of the virtual power plant; />For time->A dimensionless adjustment signal; />Is adjustable capacity;
the optimization model for distributing the adjusting signals to the micro-grid by the virtual power plant with the aim of minimizing the real-time total electricity consumption cost is as follows:
；
；
in the method, in the process of the invention,the number of interconnected micro-grids in the virtual power plant; />Is->The micro-grid is at the momentThe allocated regulated power; />Is->The individual micro-grids are at time->Is a unit electricity cost of (a).
7. The method for regulating and controlling auxiliary services of virtual power plant participation based on interconnected micro-grids according to claim 6, wherein the first step is toThe individual micro-grids are at time->Cost per unit of electricity->The method comprises the following steps:
；
；
in the method, in the process of the invention,a fixed price for a single micro grid to purchase electricity from the grid; />Unit cost for self-generation of a single microgrid;for time->Is a ratio of supply to demand of (a); />Is->The individual micro-grids are at time->Is used for the electric load of the (a).
8. The method for regulating and controlling the participation of a virtual power plant in auxiliary services based on an interconnected micro-grid according to claim 1, wherein the constraint conditions of the real-time energy rolling optimization model of the micro-grid comprise the generation power constraint, the climbing constraint of a distributed generator set and the charge and discharge power constraint and the state of charge constraint of an energy storage system.
9. A virtual power plant participation auxiliary service regulation device based on interconnected micro-grids, characterized in that it is applied to the method according to any one of claims 1-8, said device comprising:
the virtual power plant day-ahead scheduling model building module is used for building a virtual power plant day-ahead scheduling model by taking the running characteristics of the distributed generator set, the photovoltaic system and the energy storage system into consideration and taking the minimum day-ahead total running cost as a target to obtain time-sharing reference electricity consumption and adjustable capacity of the virtual power plant;
the micro-grid distribution regulation signal acquisition module is used for the power grid to distribute regulation signals to the virtual power plant according to the real-time operation condition, and the virtual power plant distributes the regulation signals to the micro-grid with the aim of minimizing the real-time total electricity consumption cost;
the optimal scheduling scheme acquisition module is used for establishing a real-time energy rolling optimization model of the micro-grid to obtain an optimal scheduling scheme of the distributed generator set and the energy storage system based on the distributed adjusting signals and aiming at minimizing the total operation cost including the adjustment deviation assessment cost, the power generation operation cost of the distributed generator set and the operation cost of the energy storage system in a prediction time domain.
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