CN112711845A - Virtual power plant response resource scheduling method and device based on communication network reliability - Google Patents
Virtual power plant response resource scheduling method and device based on communication network reliability Download PDFInfo
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Abstract
The invention discloses a method and a device for scheduling response resources of a virtual power plant based on the reliability of a communication network, wherein the method comprises the following steps: acquiring information of a power network and a communication network of a virtual power plant to be analyzed; establishing a communication network element fault model according to the change process of the operation state of the communication network element in the scheduling period; establishing an information transmission packet loss model according to a data packet transmission mechanism; representing the route as an authorized undirected graph, taking an information element as a node and a communication path as an edge, and establishing a route forwarding fault model; establishing an information transmission delay model according to the time of the data packet arriving at an information master station; based on the four models, Monte Carlo simulation is carried out under various operation scenes by utilizing the communication network information of the virtual power plant to be analyzed, the response resource regulation and control effects of the virtual power plant to be analyzed under different scenes are calculated, and the optimal resource scheduling mode is determined according to the regulation and control effects. The method has important reference significance for realizing more accurate, reliable and predictable response effect of the virtual power plant.
Description
Technical Field
The invention relates to the technical field of power system response resource scheduling, in particular to a virtual power plant response resource scheduling method and device based on communication network reliability.
Background
The virtual power plant is a virtual public facility which provides consumer-oriented electric energy service by using emerging technology, and different types of distributed energy sources such as a distributed power supply, an energy storage system, a controllable load and an electric vehicle are aggregated by advanced control, metering, communication and other technologies, and the coordinated optimization operation of a plurality of distributed energy sources is realized by a higher-level software framework, so that the reasonable optimization configuration and utilization of resources in the electric power system are realized.
The virtual power plant needs to realize the optimal configuration of power resources by means of a communication network, and although the information system provides real-time data for the scheduling strategy of the virtual power plant, the failure of the information system also affects the economy and feasibility of the resource scheduling strategy of the virtual power plant. In the prior art, most response scheduling strategies of virtual power plants are modeled and simulated, a communication network is assumed to be ideal and perfect, and the influence of the reliability of the communication network on the resource scheduling effect is not considered. Therefore, an analysis method capable of quantifying the influence of the reliability of the communication network on the response resource scheduling strategy of the virtual power plant is needed to be designed so as to achieve a more accurate, reliable and predictable response effect, and the method has important significance on the economic and reliable operation of the virtual power plant.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, one purpose of the invention is to provide a virtual power plant response resource scheduling method based on communication network reliability, which is characterized in that the method calculates the actual response capacity and economic benefit of a virtual power plant after the communication network is considered to be invalid/failed by simulating the operation process of the communication network, so as to obtain the sensitivity analysis of the response effect of the virtual power plant on the communication network reliability, identify the weak links of the communication network and further change the regulation and control mode of response resources.
The invention also aims to provide a virtual power plant response resource scheduling device based on the reliability of the communication network.
In order to achieve the above object, an embodiment of the present invention provides a method for scheduling response resources of a virtual power plant based on reliability of a communication network, including:
acquiring information of a power network and a communication network of a virtual power plant to be analyzed;
establishing a communication network element fault model according to the change process of the operation state of the communication network element in the scheduling period;
establishing an information transmission packet loss model according to a data packet transmission mechanism;
representing the route as an authorized undirected graph, taking an information element as a node and a communication path as an edge, and establishing a route forwarding fault model;
establishing an information transmission delay model according to the time of the data packet arriving at an information master station;
and carrying out Monte Carlo simulation under various operation scenes by utilizing the communication network information of the virtual power plant to be analyzed based on the communication network element fault model, the information transmission packet loss model, the route forwarding fault model and the information transmission delay model, calculating response resource regulation and control effects of the virtual power plant to be analyzed under different scenes, and determining an optimal resource scheduling mode according to the regulation and control effects.
According to the virtual power plant response resource scheduling method based on the communication network reliability, the operation process of the communication network is simulated, the actual response capacity and the economic benefit of the virtual power plant after the failure/fault of the communication network is considered are calculated, the sensitivity analysis of the response effect of the virtual power plant on the communication network reliability is obtained, the weak link of the communication network is identified, and the regulation and control mode of response resources is further changed. The method has important reference significance for realizing more accurate, reliable and predictable response effect of the virtual power plant.
In addition, the virtual power plant response resource scheduling method based on the reliability of the communication network according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present invention, the power grid and communication grid information of the virtual power plant to be analyzed includes: the method comprises the steps of distributed resource power generation cost, user energy demand of a demand side, a topological graph of communication network element connection, the type and the position of communication network element equipment and a communication network operation protocol.
Further, in an embodiment of the present invention, in the communication network element fault model, both the fault time and the repair time of the setting element are in accordance with an exponential distribution.
Further, in an embodiment of the present invention, the information transmission packet loss model includes an error rate model and a retransmission model, and generates a random number, if the random number is within an error rate range of the error rate model, the data packet is lost, a retransmission mechanism in the retransmission model is triggered, the data packet is retransmitted, and if the retransmission number reaches a preset number, the data packet is lost, and the corresponding data transmission is invalid.
Further, in an embodiment of the present invention, in the route forwarding fault model, a route path from an information node corresponding to a distributed resource to a virtual power plant information master station is found through a Bellman-ford algorithm, and if an element fault route path does not exist and information cannot reach the master station, corresponding data transmission is invalid.
Further, in an embodiment of the present invention, in the information transmission delay model, according to the requirement of the virtual power plant service on information transmission delay, if a data packet does not reach the information master station within a specified delay requirement and exceeds the validity period of the data information, the data packet is regarded as invalid data.
Further, in an embodiment of the present invention, a regulation manner with the largest difference between response resources and a failure-free condition is used as the optimal resource scheduling manner.
In order to achieve the above object, an embodiment of another aspect of the present invention provides a virtual power plant response resource scheduling device based on communication network reliability, including:
the acquisition module is used for acquiring information of a power network and a communication network of the virtual power plant to be analyzed;
the first establishing module is used for establishing a communication network element fault model according to the change process of the operation state of the communication network element in the dispatching cycle;
the second establishing module is used for establishing an information transmission packet loss model according to a data packet transmission mechanism;
a third establishing module, configured to represent the route as an authorized undirected graph, where the information elements are nodes and the communication path is an edge, and establish a route forwarding fault model;
the fourth establishing module is used for establishing an information transmission delay model according to the time of the data packet arriving at the information master station;
and the scheduling module is used for carrying out Monte Carlo simulation under various operation scenes by utilizing the communication network information of the virtual power plant to be analyzed based on the communication network element fault model, the information transmission packet loss model, the route forwarding fault model and the information transmission delay model, calculating response resource regulation and control effects of the virtual power plant to be analyzed under different scenes, and determining an optimal resource scheduling mode according to the regulation and control effects.
According to the virtual power plant response resource scheduling device based on the communication network reliability, the operation process of the communication network is simulated, the actual response capability and the economic benefit of the virtual power plant after the failure/fault of the communication network is considered are calculated, the sensitivity analysis of the response effect of the virtual power plant on the communication network reliability is obtained, the weak link of the communication network is identified, and the regulation and control mode of response resources is further changed. The method has important reference significance for realizing more accurate, reliable and predictable response effect of the virtual power plant.
In addition, the virtual power plant response resource scheduling device based on the reliability of the communication network according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present invention, the power grid and communication grid information of the virtual power plant to be analyzed includes: distributed resource power generation cost, user energy demand of demand side, topological graph of communication network element connection, communication network element equipment type and position and communication network operation protocol
Further, in an embodiment of the present invention, a regulation manner with the largest difference between response resources and a failure-free condition is used as the optimal resource scheduling manner.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a virtual power plant response resource scheduling method based on communication network reliability according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a virtual power plant response resource scheduling device based on communication network reliability according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a virtual power plant response resource scheduling method and device based on communication network reliability according to an embodiment of the invention with reference to the accompanying drawings.
First, a virtual power plant response resource scheduling method based on communication network reliability according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a flow chart of a virtual power plant response resource scheduling method based on communication network reliability according to an embodiment of the invention.
As shown in fig. 1, the virtual power plant response resource scheduling method based on the reliability of the communication network includes the following steps:
and step S1, acquiring the information of the power grid and the communication network of the virtual power plant to be analyzed.
Further, the information of the power grid and the communication network of the virtual power plant to be analyzed includes: the method comprises the steps of distributed resource power generation cost, user energy demand of a demand side, a topological graph of communication network element connection, the type and the position of communication network element equipment and a communication network operation protocol.
And step S2, establishing a communication network element fault model according to the change process of the operation state of the communication network element in the scheduling period.
Further, the communication network element fault model simulates the change process of the operation state of the communication network element in the whole scheduling period, and if the fault time and the repair time of a certain element both accord with exponential distribution, random numbers corresponding to the exponential distribution are generated, and the time sequence of the operation state (fault-normal) of the element is obtained.
And step S3, establishing an information transmission packet loss model according to a data packet transmission mechanism.
Specifically, the error rate model and the retransmission model correspond to the channel quality level of the communication type. And generating a random number, if the random number is in the range of the error rate, losing the information packet, triggering retransmission, and if the transmission is not successful after the maximum retransmission times is reached, losing the data packet and transmitting the corresponding data inefficiently.
And step S4, representing the route as an authorized undirected graph, wherein the information elements are nodes, the communication path is an edge, and establishing a route forwarding fault model.
Specifically, a route is expressed as an authorized undirected graph, an information element is used as a node, a communication path is used as an edge, a route path from the information node corresponding to the distributed resource to the virtual power plant information master station is found through a Bellman-ford algorithm, if the route path does not exist due to element faults, information cannot reach the master station, and corresponding data transmission is invalid.
And step S5, establishing an information transmission delay model according to the arrival time of the data packet at the information master station.
Further, considering the requirement of the virtual power plant service on information transmission delay, if the data packet does not reach the information master station within the specified time delay requirement and exceeds the validity period of the data information, the data packet is regarded as invalid data.
And step S6, carrying out Monte Carlo simulation under various operation scenes by utilizing the communication network information of the virtual power plant to be analyzed based on the communication network element fault model, the information transmission packet loss model, the route forwarding fault model and the information transmission delay model, calculating response resource regulation and control effects of the virtual power plant to be analyzed under different scenes, and determining an optimal resource scheduling mode according to the regulation and control effects.
Specifically, the four models are considered, simulation is carried out under various operation scenes through Monte Carlo simulation, response resource regulation and control effects of the virtual power plant under different scenes are calculated, and weak links of the communication network are identified. And taking the regulation and control mode with the maximum difference between the response resource and the fault-free condition as a final resource scheduling mode.
According to the virtual power plant response resource scheduling method based on the communication network reliability, disclosed by the embodiment of the invention, a route forwarding fault model, an information transmission delay model and Monte Carlo simulation are established through information collection and establishment of an element fault model and an information transmission packet loss model. Therefore, by simulating the operation process of the communication network, the actual response capability and the economic benefit of the virtual power plant after the failure/fault of the communication network is considered are calculated, the sensitivity analysis of the response effect of the virtual power plant on the reliability of the communication network is obtained, the weak link of the communication network is identified, and the regulation and control mode for changing the response resource is further realized. The method has important reference significance for realizing more accurate, reliable and predictable response effect of the virtual power plant.
The virtual power plant response resource scheduling device based on the reliability of the communication network, which is provided by the embodiment of the invention, is described next with reference to the attached drawings.
FIG. 2 is a schematic structural diagram of a virtual power plant response resource scheduling device based on communication network reliability according to an embodiment of the present invention.
As shown in fig. 2, the virtual plant response resource scheduling device based on the reliability of the communication network includes: an acquisition module 201, a first establishment module 202, a second establishment module 203, a third establishment module 204, a fourth establishment module 205, and a scheduling module 206.
The obtaining module 201 is configured to obtain information of a power grid and a communication network of the virtual power plant to be analyzed.
A first establishing module 202, configured to establish a communication network element fault model according to a change process of an operating state of a communication network element in a scheduling period.
The second establishing module 203 is configured to establish an information transmission packet loss model according to a data packet transmission mechanism.
And a third establishing module 204, configured to represent the route as an authorized undirected graph, where the information element is a node, and the communication path is an edge, and establish a route forwarding fault model.
A fourth establishing module 205, configured to establish an information transmission delay model according to the time when the data packet arrives at the information master station.
And the scheduling module 206 is configured to perform monte carlo simulation in multiple operation scenes by using the communication network information of the virtual power plant to be analyzed based on the communication network element fault model, the information transmission packet loss model, the route forwarding fault model and the information transmission delay model, calculate response resource regulation and control effects of the virtual power plant to be analyzed in different scenes, and determine an optimal resource scheduling mode according to the regulation and control effects.
Further, in one embodiment of the present invention, the power grid and communication grid information of the virtual power plant to be analyzed includes: the method comprises the steps of distributed resource power generation cost, user energy demand of a demand side, a topological graph of communication network element connection, the type and the position of communication network element equipment and a communication network operation protocol.
Further, in an embodiment of the present invention, a regulation and control method that has the largest difference between response resources and a fault-free condition is used as an optimal resource scheduling method.
It should be noted that the foregoing explanation of the method embodiment is also applicable to the apparatus of this embodiment, and is not repeated herein.
According to the virtual power plant response resource scheduling device based on the reliability of the communication network, which is provided by the embodiment of the invention, a component fault model is established, an information transmission packet loss model is established, a route forwarding fault model is established, an information transmission delay model is established, and Monte Carlo simulation is carried out. Therefore, by simulating the operation process of the communication network, the actual response capability and the economic benefit of the virtual power plant after the failure/fault of the communication network is considered are calculated, the sensitivity analysis of the response effect of the virtual power plant on the reliability of the communication network is obtained, the weak link of the communication network is identified, and the regulation and control mode for changing the response resource is further realized. The method has important reference significance for realizing more accurate, reliable and predictable response effect of the virtual power plant.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A virtual power plant response resource scheduling method based on communication network reliability is characterized by comprising the following steps:
acquiring information of a power network and a communication network of a virtual power plant to be analyzed;
establishing a communication network element fault model according to the change process of the operation state of the communication network element in the scheduling period;
establishing an information transmission packet loss model according to a data packet transmission mechanism;
representing the route as an authorized undirected graph, taking an information element as a node and a communication path as an edge, and establishing a route forwarding fault model;
establishing an information transmission delay model according to the time of the data packet arriving at an information master station;
and carrying out Monte Carlo simulation under various operation scenes by utilizing the communication network information of the virtual power plant to be analyzed based on the communication network element fault model, the information transmission packet loss model, the route forwarding fault model and the information transmission delay model, calculating response resource regulation and control effects of the virtual power plant to be analyzed under different scenes, and determining an optimal resource scheduling mode according to the regulation and control effects.
2. The method of claim 1, wherein the power grid and communication grid information of the virtual power plant to be analyzed comprises: the method comprises the steps of distributed resource power generation cost, user energy demand of a demand side, a topological graph of communication network element connection, the type and the position of communication network element equipment and a communication network operation protocol.
3. The method of claim 1, wherein in the communication network element failure model, the failure time and the repair time of a set element are both exponentially distributed.
4. The method according to claim 1, wherein the information transmission packet loss model includes an error rate model and a retransmission model, and generates a random number, if the random number is within an error rate range of the error rate model, the data packet is lost, a retransmission mechanism in the retransmission model is triggered, the data packet is retransmitted, and if the retransmission number reaches a preset number, the transmission is still unsuccessful, the data packet is lost, and the corresponding data transmission is invalid.
5. The method according to claim 1, wherein in the route forwarding fault model, a route path from an information node corresponding to the distributed resource to a virtual power plant information main station is found through a Bellman-ford algorithm, and if the element fault route path does not exist and the information cannot reach the main station, corresponding data transmission is invalid.
6. The method of claim 1, wherein in the information transmission delay model, according to the requirement of the virtual power plant service on information transmission delay, if the data packet does not reach the information main station within a specified delay requirement and exceeds the validity period of the data information, the data packet is regarded as invalid data.
7. The method according to claim 1, wherein the optimal resource scheduling mode is the regulation mode with the largest difference between response resource and no fault.
8. The utility model provides a virtual power plant response resource scheduling device based on communication network reliability which characterized in that includes:
the acquisition module is used for acquiring information of a power network and a communication network of the virtual power plant to be analyzed;
the first establishing module is used for establishing a communication network element fault model according to the change process of the operation state of the communication network element in the dispatching cycle;
the second establishing module is used for establishing an information transmission packet loss model according to a data packet transmission mechanism;
a third establishing module, configured to represent the route as an authorized undirected graph, where the information elements are nodes and the communication path is an edge, and establish a route forwarding fault model;
the fourth establishing module is used for establishing an information transmission delay model according to the time of the data packet arriving at the information master station;
and the scheduling module is used for carrying out Monte Carlo simulation under various operation scenes by utilizing the communication network information of the virtual power plant to be analyzed based on the communication network element fault model, the information transmission packet loss model, the route forwarding fault model and the information transmission delay model, calculating response resource regulation and control effects of the virtual power plant to be analyzed under different scenes, and determining an optimal resource scheduling mode according to the regulation and control effects.
9. The apparatus of claim 8, wherein the power grid and communication grid information of the virtual power plant to be analyzed comprises: the method comprises the steps of distributed resource power generation cost, user energy demand of a demand side, a topological graph of communication network element connection, the type and the position of communication network element equipment and a communication network operation protocol.
10. The apparatus of claim 8, wherein the optimal resource scheduling mode is the regulation mode with the largest difference between response resource and no fault.
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| CN113507141B (en) * | 2021-07-08 | 2024-04-09 | 国网上海市电力公司 | Virtual power plant equivalent closed-loop control method, system, electronic equipment and storage medium |
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