Monitoring system for virtual power plant facing power grid

Abstract

The invention discloses a power grid-oriented virtual power plant monitoring system, and relates to the technical field of power grid-oriented virtual power plant monitoring systems, and the technical scheme is characterized in that the system comprises a centralized control module, a transmission module and an alarm module; the centralized control module is electrically connected with the transmission module and the alarm module. The transmission module is electrically connected with the alarm module. And the centralized control module comprises a data monitoring module and a wireless communication module, and the centralized control module is used for operating the power plant operation equipment and carrying out analogue simulation and operation on the power plant operation equipment. The power grid-oriented monitoring system for the virtual power plant has the effects that when the power grid-oriented monitoring system is used, the operation state of energy storage equipment in the virtual power plant can be adjusted in real time according to the generated difference value, and when the preset power supply amount of the virtual power plant is different from the actual power supply amount, the energy storage equipment can be adjusted, so that the power grid-oriented monitoring system is more convenient to use. Therefore, the capacity demand for the energy storage equipment is reduced, and the cost output of the virtual power plant is reduced to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of virtual power plant monitoring, and more specifically, to a monitoring system for a virtual power plant oriented to a power grid. Background Art

[0002] A virtual power plant is a power coordination management system that uses advanced information and communication technologies and software systems to achieve aggregation and coordinated optimization of DERs such as DG, energy storage systems, controllable loads, and electric vehicles, so that it can participate in the electricity market and power grid operation as a special power plant. The core of the concept of a virtual power plant can be summarized as "communication" and "aggregation". The key technologies of virtual power plants mainly include coordinated control technology, smart metering technology, and information and communication technology. The most attractive function of a virtual power plant is that it can aggregate DERs to participate in the operation of the electricity market and ancillary service market, and provide management and ancillary services for distribution and transmission networks.

[0003] Since the power grid requires power plants to maintain a continuous and stable power supply, the actual power consumption may differ from the predicted power consumption, which in turn leads to differences between the actual power consumption of the virtual power plant and the predicted power consumption.

[0004] Therefore, in order to narrow the gap between actual power supply and predicted power consumption, existing virtual power plants usually use higher-capacity energy storage devices for virtual power plants, which in turn leads to the problem of high operating costs of virtual power plants. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a monitoring system for a virtual power plant for a power grid.

[0006] To achieve the above object, the present invention provides the following technical solution, including: a centralized control module, a transmission module and an alarm module; the centralized control module is electrically connected to the transmission module and the alarm module respectively, and the transmission module is electrically connected to the alarm module; Centralized control module: The centralized control module includes a data monitoring module and a wireless communication module. The centralized control module is used to operate the power plant operating equipment, simulate and operate the power plant operating equipment, and then feed back the obtained simulation data of the virtual power plant operating equipment to the data monitoring module. Then the data monitoring module formulates the monitoring target according to the feedback data, and feeds back the monitoring target indication to the wireless communication module, and finally feeds back the data to the transmission module through the wireless communication module; The power plant operator is the person who monitors the real-time operation environment of the virtual power plant throughout the day. The centralized control module is used to determine whether there are power plant operators who monitor the real-time operation environment of the virtual power plant throughout the day. At the same time, the centralized control module is also used to determine that the person who currently monitors the real-time operation environment of the virtual power plant throughout the day is the power plant operator, not other personnel, so as to effectively prevent other personnel from misoperating the virtual power plant.

[0007] The monitoring module also has dynamic processing and monitoring functions. It performs statistical analysis on the collected power plant data to obtain the power plant operation status, and uses the graphical interface and display media to display various data and equipment in the power plant statically and dynamically, and monitors and displays the working status of all equipment in the monitoring system in real time, so that the monitoring personnel and related management personnel can monitor the power plant operation status and system operation status at any time, and realize comprehensive monitoring of the power plant; The monitoring module is also used for automatic data backup and system recovery. It can automatically back up important data in real time. Once the system is damaged, it can restore system operation as soon as possible. It can also automatically test the system's normal operation, including the channel connection status with various monitoring sub-centers, and automatically display and print diagnostic reports when abnormal conditions are detected.

[0008] Transmission module: The transmission module also includes an energy management module and a data acquisition module. The transmission module is used to generate data from the operating status of the power plant, and determine whether to generate alarm information based on the data results, and finally feed back the determination data to the energy management module and the data management module; Alarm module: used to determine whether the generated alarm information is valid, such as effectively alarming the power plant operating equipment and operating personnel.

[0009] Preferably, the centralized control module further includes a control module and a processing module, wherein the control module is used to retrieve a pre-generated electronic map and obtain power supply data, power consumption data and power storage data, and then generate a plurality of power control strategies corresponding to different areas on the electronic map according to the power supply data, power consumption data and power storage data, and the extraction module is used to perform network topology simplification processing on the area including the energy storage power station on the electronic map to obtain a plurality of network topological structures corresponding to the plurality of energy storage power stations; Retrieving a pre-generated electronic map, and obtaining power supply data, power consumption data and power storage data, and then generating multiple power control strategies corresponding to different areas on the electronic map based on the power supply data, power consumption data and power storage data; performing network topology simplification processing on the area including the energy storage power station on the electronic map to obtain multiple network topological structures corresponding to the multiple energy storage power stations; using a preset clustering algorithm, based on the multiple network topological structures, clustering the multiple energy storage power stations to obtain multiple clusters; according to a preset energy storage power station extraction method, extracting a first energy storage power station from each cluster, and performing comprehensive monitoring processing on each first energy storage power station to obtain multiple first parameter sets; The electronic map records information related to the virtual power plant, such as information about the energy storage power station (including location), information about power equipment, etc., which is the basis for the virtual power plant to formulate power control strategies. The power control strategy of the present application can be generated in any feasible way. Its essence lies in performing appropriate power control according to the power supply, power consumption and storage capacity. For example, the power control strategy can be generated based on the principle of smooth transition of power consumption as much as possible, which will not be repeated here. In addition, the power control strategy of the present application is refined into different areas, and these areas include energy storage power stations. Therefore, what is generated are multiple power control strategies for different areas on the electronic map. Depending on the granularity, each power control strategy may include only one energy storage power station, and preferably only one energy storage power station; The network topology simplification process can be implemented in any feasible way to facilitate the subsequent clustering calculation and the overall division of the energy storage power station. Different types of energy storage power stations and energy storage power stations of different sizes will be reflected in the network topology structure after the network topology simplification process.

[0010] Preferably, the transmission module also includes a background processor and a console, a human proximity sensor is installed on the bottom side of the console, and a face recognition module is installed on the top side of the console, the human proximity sensor and the face recognition module are electrically connected to the console respectively, and the human proximity sensor, the face recognition module, the console and the real-time simulation module are electrically connected to the background processor respectively.

[0011] Preferably, the background processor also includes a clustering module, which is used to extract a first energy storage module and a second energy storage module from each cluster according to a preset power plant extraction method and perform comprehensive monitoring processing on each energy storage module to obtain multiple parameter sets.

[0012] Preferably, the similarity value between the first power control strategy and the second power control strategy is calculated according to a preset similarity calculation method, and it is determined whether the similarity value is greater than a preset similarity threshold; The preset clustering algorithm can be any feasible algorithm, such as K-value clustering, Gaussian model clustering, graph group detection clustering, etc. In the obtained multiple clusters, the energy storage power stations in the same cluster will have the same or similar network topology. For energy storage power stations, if they have the same or similar network topology, they are likely to be required to execute the same or similar power control strategy and they are likely to have the same or similar parameters.

[0013] Preferably, the time is used as the independent variable, the estimated active output value of the energy storage power station is used as the dependent variable, a first function corresponding to the first power control strategy is established, and a second function corresponding to the second power control strategy is established: Use the following formula: t1 = arg min(J(t)) , and Calculate the first point set t1; wherein q1, q2, q3 are all parameters preset to be greater than 0, and q3 is greater than the sum of q1 and q2, K(t) is the first function, and L(t) is the second function; Since the second parameter set is composed of only a few parameters, it is not possible to reflect the operating state of the second energy storage power station with this alone. Therefore, the first parameter set is required, and the special matching value calculation formula in this application is used to measure the matching state between the second parameter set and the first parameter set, thereby indirectly determining the operating state of the second energy storage power station. It should be noted that this analysis method is an indirect analysis, and there are still some situations where the matching value is low, but the second energy storage power station still meets the corresponding power control strategy in a way different from the parameter set of the first energy storage power station. However, the existence of this situation does not violate the original intention of this application, because this application only requires finding some or even most of the second energy storage power stations that can be non-comprehensively monitored. For the above situation, it can still be solved by continuing comprehensive monitoring. Therefore, for the overall composition of some or even most of the energy storage power stations, the resource consumption is relatively small.

[0014] Preferably, the alarm module is installed on the console, and the alarm module is electrically connected to the console and the background processor respectively; Power plant operators need to monitor the operating status of various professional equipment in the power plant in real time in front of the control console all day long. However, the personnel in front of the control console must be professional power plant operators. The human proximity sensor installed on the bottom side of the control console is used to determine whether there is a person in front of the control console. At the same time, the face recognition module installed on the top side of the control console is used to determine whether the person in front of the control console is a professional power plant operator. It should be noted that the professional power plant operator in front of the control console can perform face recognition in advance when the control console is used, store the face information of the professional power plant operator, and compare the face information of the person in front of the control console recognized in real time by the face recognition module with the pre-stored face information of the professional power plant operator to determine whether the person in front of the current control console is a professional power plant operator; Furthermore, the background processor also performs the following operations: Generate a distributed power supply control instruction table according to the power supply information of each distributed power supply and the predicted power curve; Generating a controllable load control instruction table according to a control instruction set and an operation time period of each controllable load, wherein the control instruction set is generated according to an operation combination of the controllable load; Generate second control information according to the distributed power supply control instruction table and the controllable load control instruction table; Sending the second control information to the energy node controller, wherein the energy node controller controls the operation status of the distributed power source and the controllable load in each time period according to the second control information, and after the energy node receives the first control information, replaces the control parameters of the second control information in the corresponding time period according to the control parameters corresponding to the first control information; Furthermore, the background processor may be used to debug the operation control program of the virtual power plant and perform the following operations: receiving weather forecast data and power supply information within a preset time interval for each distributed power source; Generating a predicted power curve for each distributed power source according to the meteorological forecast data and power source information within a preset time interval of each distributed power source; Superimposing the predicted power curves of the distributed power sources to obtain a predicted power generation curve within a preset time interval; Superimposing the predicted power curves of the distributed power sources to obtain a predicted power generation curve; receiving operating parameters of each controllable load; Generating an operation combination of each controllable load according to the operation parameters of each controllable load, wherein the operation combination includes the number of operations, the single operation duration, and the single predicted power consumption; Generate a predicted power generation amount in each time period according to the predicted power generation curve; Determine the operation time period of each operation combination according to the predicted power generation in each time period and the single predicted power consumption of each operation combination; A predicted power consumption curve within a preset time interval is generated according to the single predicted power consumption of each operation combination and the operation time period.

[0015] Preferably, the transmission module further comprises a simulation module, wherein the simulation module comprises: a boiler side simulation module, a turbine side simulation module, a generator side simulation module, a recording module and a data storage module; The boiler-side simulation module is connected to the control and display module via a connecting line, and is used to simulate and operate the operating equipment on the boiler side of the power plant, and feed back the simulation data of the operating equipment on the boiler side of the power plant to the control and display module; The steam turbine side simulation module is connected to the control display module through a connecting line, and is used to simulate and operate the operating equipment on the steam turbine side of the power plant, and feed back the simulation data of the operating equipment on the steam turbine side of the power plant to the control display module; The generator side simulation module is connected to the control display module through a connecting line, and is used to simulate and operate the operating equipment on the generator side of the power plant, and feed back the simulation data of the operating equipment on the generator side of the power plant to the control display module; The recording module is connected to the control and display module via a connecting line, and is used to record the operation data of the power plant operator and feed the operation data back to the control and display module.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. A monitoring system for a virtual power plant for a power grid. When in use, this solution can adjust the operating status of the energy storage equipment in the virtual power plant in real time according to the difference generated. When there is a difference between the preset power supply of the virtual power plant and the actual power supply, the energy storage equipment can be adjusted, thereby reducing the capacity demand for the energy storage equipment and reducing the cost output of the virtual power plant to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a module display diagram of a monitoring system for a virtual power plant for a power grid according to the present invention. DETAILED DESCRIPTION

[0018] Reference Figure 1 The present invention further describes an embodiment of a monitoring system for a virtual power plant for a power grid.

[0019] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] A monitoring system for a virtual power plant for a power grid, comprising: a centralized control module, a transmission module and an alarm module; the centralized control module is electrically connected to the transmission module and the alarm module respectively, and the transmission module is electrically connected to the alarm module; Centralized control module: The centralized control module includes a data monitoring module and a wireless communication module. The centralized control module is used to operate the power plant operating equipment, simulate and operate the power plant operating equipment, and then feed back the obtained simulation data of the virtual power plant operating equipment to the data monitoring module. Then the data monitoring module formulates the monitoring target according to the feedback data, and feeds back the monitoring target indication to the wireless communication module, and finally feeds back the data to the transmission module through the wireless communication module; Transmission module: The transmission module also includes an energy management module and a data acquisition module. The transmission module is used to generate data from the operating status of the power plant, and determine whether to generate alarm information based on the data results, and finally feed back the determination data to the energy management module and the data management module; Alarm module: used to determine whether the generated alarm information is valid, such as effectively alarming the power plant operating equipment and operating personnel.

[0022] The centralized control module also includes a control module and a processing module. The control module is used to call a pre-generated electronic map and obtain power supply data, power consumption data and power storage data, and then generate multiple power control strategies corresponding to different areas on the electronic map based on the power supply data, power consumption data and power storage data. The extraction module is used to perform network topology simplification processing on the area including the energy storage power station on the electronic map to obtain multiple network topology structures corresponding to multiple energy storage power stations.

[0023] The transmission module also includes a background processor and a console, a human proximity sensor is installed on the bottom side of the console, and a face recognition module is installed on the top side of the console, the human proximity sensor and the face recognition module are electrically connected to the console respectively, and the human proximity sensor, the face recognition module, the console and the real-time simulation module are electrically connected to the background processor respectively.

[0024] The background processor also includes a clustering module, which is used to extract a first energy storage module and a second energy storage module from each cluster according to a preset power plant extraction method and perform comprehensive monitoring processing on each energy storage module to obtain multiple parameter sets.

[0025] The similarity value between the first power control strategy and the second power control strategy is calculated according to a preset similarity calculation method, and it is determined whether the similarity value is greater than a preset similarity threshold.

[0026] The monitoring system for a virtual power plant for a power grid according to claim 1 is characterized in that, taking time as an independent variable and the estimated active output value of the energy storage power station as a dependent variable, a first function corresponding to a first power control strategy is established, and a second function corresponding to a second power control strategy is established: Use the following formula: t1 = arg min (J (t)), and The first point set t1 is calculated; wherein q1, q2, and q3 are all parameters preset to be greater than 0, and q3 is greater than the sum of q1 and q2, K(t) is the first function, and L(t) is the second function.

[0027] The alarm module is installed on the console, and the alarm module is electrically connected to the console and the background processor respectively.

[0028] The transmission module also includes a simulation module, wherein the simulation module includes: a boiler side simulation module, a turbine side simulation module, a generator side simulation module, a recording module and a data storage module; The boiler-side simulation module is connected to the control and display module via a connecting line, and is used to simulate and operate the operating equipment on the boiler side of the power plant, and feed back the simulation data of the operating equipment on the boiler side of the power plant to the control and display module; The steam turbine side simulation module is connected to the control display module through a connecting line, and is used to simulate and operate the operating equipment on the steam turbine side of the power plant, and feed back the simulation data of the operating equipment on the steam turbine side of the power plant to the control display module; The generator side simulation module is connected to the control display module through a connecting line, and is used to simulate and operate the operating equipment on the generator side of the power plant, and feed back the simulation data of the operating equipment on the generator side of the power plant to the control display module; The recording module is connected to the control and display module via a connecting line, and is used to record the operation data of the power plant operator and feed the operation data back to the control and display module.

[0029] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A monitoring system for a virtual power plant for a power grid, characterized in that: include: Centralized control module, transmission module and alarm module; the centralized control module is electrically connected to the transmission module and the alarm module respectively, and the transmission module is electrically connected to the alarm module; Centralized control module: The centralized control module includes a data monitoring module and a wireless communication module. The centralized control module is used to operate the power plant operating equipment, simulate and operate the power plant operating equipment, and then feed back the obtained simulation data of the virtual power plant operating equipment to the data monitoring module. Then the data monitoring module formulates the monitoring target according to the feedback data, and feeds back the monitoring target indication to the wireless communication module, and finally feeds back the data to the transmission module through the wireless communication module; Transmission module: The transmission module also includes an energy management module and a data acquisition module. The transmission module is used to generate data from the operating status of the power plant, and determine whether to generate alarm information based on the data results, and finally feed back the determination data to the energy management module and the data management module; Alarm module: used to determine whether the generated alarm information is valid, such as effectively alarming the power plant operating equipment and operating personnel.

2. The monitoring system for a virtual power plant for a power grid according to claim 1, characterized in that: The centralized control module also includes a control module and a processing module. The control module is used to call a pre-generated electronic map and obtain power supply data, power consumption data and power storage data, and then generate multiple power control strategies corresponding to different areas on the electronic map based on the power supply data, power consumption data and power storage data. The extraction module is used to perform network topology simplification processing on the area including the energy storage power station on the electronic map to obtain multiple network topology structures corresponding to multiple energy storage power stations.

3. The monitoring system for a virtual power plant for a power grid according to claim 1, characterized in that: The transmission module also includes a background processor and a console, a human proximity sensor is installed on the bottom side of the console, and a face recognition module is installed on the top side of the console, the human proximity sensor and the face recognition module are electrically connected to the console respectively, and the human proximity sensor, the face recognition module, the console and the real-time simulation module are electrically connected to the background processor respectively.

4. The monitoring system for a virtual power plant for a power grid according to claim 3, characterized in that: The background processor also includes a clustering module, which is used to extract a first energy storage module and a second energy storage module from each cluster according to a preset power plant extraction method and perform comprehensive monitoring processing on each energy storage module to obtain multiple parameter sets.

5. The monitoring system for a virtual power plant for a power grid according to claim 1, characterized in that: The similarity value between the first power control strategy and the second power control strategy is calculated according to a preset similarity calculation method, and it is determined whether the similarity value is greater than a preset similarity threshold.

6. The monitoring system for a virtual power plant for a power grid according to claim 1, characterized in that: The monitoring system for a virtual power plant for a power grid according to claim 1 is characterized in that, taking time as an independent variable and the estimated active output value of the energy storage power station as a dependent variable, a first function corresponding to a first power control strategy is established, and a second function corresponding to a second power control strategy is established: Use the following formula: t1 = arg min (J (t)), and The first point set t1 is calculated; wherein q1, q2, and q3 are all parameters preset to be greater than 0, and q3 is greater than the sum of q1 and q2, K(t) is the first function, and L(t) is the second function.

7. The monitoring system for a virtual power plant for a power grid according to claim 1, characterized in that: The alarm module is installed on the console, and the alarm module is electrically connected to the console and the background processor respectively.

8. The monitoring system for a virtual power plant for a power grid according to claim 1, characterized in that: The transmission module also includes a simulation module, wherein the simulation module includes: a boiler side simulation module, a turbine side simulation module, a generator side simulation module, a recording module and a data storage module; The boiler-side simulation module is connected to the control and display module via a connecting line, and is used to simulate and operate the operating equipment on the boiler side of the power plant, and feed back the simulation data of the operating equipment on the boiler side of the power plant to the control and display module; The steam turbine side simulation module is connected to the control display module through a connecting line, and is used to simulate and operate the operating equipment on the steam turbine side of the power plant, and feed back the simulation data of the operating equipment on the steam turbine side of the power plant to the control display module; The generator side simulation module is connected to the control display module through a connecting line, and is used to simulate and operate the operating equipment on the generator side of the power plant, and feed back the simulation data of the operating equipment on the generator side of the power plant to the control display module; The recording module is connected to the control and display module via a connecting line, and is used to record the operation data of the power plant operator and feed the operation data back to the control and display module.

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