Wide-area coordinated operation method and device of electric power system

Abstract

The invention relates to the technical field of electric power system operation control, in particular to a wide-area coordinated operation method of an electric power system. The embodiment of the invention provides a wide-area coordinated operation method of an electric power system. The method comprises the following steps: collecting real-time generating capacity of the electric power system; acquiring the real-time power consumption demand quantity of the power system load; and judging whether an electricity utilization gap exists or not according to the generating capacity and the electricity utilization demand quantity, if yes, collecting the gap electric quantity of the electricity utilization gap, and utilizing the energy storage module to release electric energy to make up the gap electric quantity, and if not, storing the over-generated electric quantity to the energy storage module. The embodiment of the invention provides a wide-area coordinated operation method of a power system, which can coordinate the generating capacity of a power grid according to the demand quantity of a load end through coordinated control.

Description

Technical Field

[0001] The present invention relates to the technical field of power system operation control, and in particular to a method and device for wide-area coordinated operation of a power system. Background Art

[0002] At present, with the construction of new energy power plants in my country, the proportion of electricity provided by new energy in the total electricity is gradually increasing. Finally, new energy and traditional energy are integrated into the power grid to supply electricity to the load side of the power grid. However, the power generation of new energy is unstable and cannot be well matched with the demand of the load side. Summary of the invention

[0003] The embodiments of the present invention provide a method, device, electronic device and storage medium for wide-area coordinated operation of an electric power system, which can coordinate the power generation of a power grid according to the demand of a load end through coordinated control.

[0004] In a first aspect, an embodiment of the present invention provides a method for wide-area coordinated operation of a power system, comprising: Collect the real-time power generation of the power system; Collect the real-time power demand of the power system load; It is determined whether there is a power gap based on the power generation and the power demand. If so, the power gap electricity is collected and the energy storage module is used to release electric energy to make up for the power gap. If there is no power gap, the over-generated electricity is stored in the energy storage module.

[0005] In one possible design, it also includes: Collect meteorological data to predict the power generation of new energy power plants and obtain predicted power generation; According to the historical power consumption, the load power consumption is predicted to obtain the predicted power demand; Determining a predicted electricity gap according to the predicted power generation and the predicted power demand; wherein the predicted power generation and the predicted power demand are predicted values ​​within the same future preset time period; The predicted power gap is compared with the power currently stored in the energy storage module. When the predicted power gap is greater than the power currently stored in the energy storage module, the amount of power to be compensated for the predicted power gap and the power currently stored in the energy storage module is determined, and the power generation of the traditional power plant is adjusted according to the amount to be compensated and the future preset time period.

[0006] In a possible design, the meteorological data is collected to predict the power generation of the new energy power plant to obtain the predicted power generation, including: Collect meteorological data to predict the power generation of new energy power plants and obtain the predicted power generation of new energy; According to the power generation efficiency of the current traditional power plants, the predicted power generation of the traditional power plants is predicted; The predicted power generation of the new energy source and the predicted power generation of the traditional power plant are summed to obtain the predicted power generation.

[0007] In a possible design, adjusting the power generation of the traditional power plant according to the amount of electricity to be compensated and the future preset time period includes: The power generation increment per unit time is determined according to the amount of electricity to be compensated and the future preset time period, and the power generation of the traditional power plant is regulated by the power generation growth efficiency of increasing the power generation increment per unit time.

[0008] In a possible design, the collecting of meteorological data to predict the power generation of a new energy power plant to obtain the predicted power generation of new energy includes: Collect historical meteorological data, extract feature vectors from the meteorological data, normalize the feature vectors obtained from different types of meteorological data, train a neural network based on the normalized data, optimize the data output by the neural network based on historical power generation data, and obtain a power generation model after the training is completed; The predicted power generation of new energy is output according to the predicted meteorological data and the power generation model.

[0009] In a possible design, the load power consumption is predicted based on the historical power consumption to obtain the predicted power demand, including: Collecting the annual historical electricity consumption in different years and the same period of the future preset time period; The predicted electricity demand is obtained based on the annual historical electricity consumption forecast.

[0010] In one possible design, it also includes: Setting a plurality of different future preset time periods to respectively predict the predicted power generation and the predicted power demand, to obtain a plurality of the predicted power generation and the predicted power demand; When multiple amounts of electricity to be compensated are obtained, the predicted power generation and the predicted electricity demand in the future preset time period closest to the current time are selected, the amount of electricity to be compensated is calculated, and the power generation of the traditional power plant is adjusted according to the amount of electricity to be compensated.

[0011] In a second aspect, an embodiment of the present invention further provides a wide-area coordinated operation device of a power system, which is used to implement any of the above methods, and the device includes: The first unit is used to collect the real-time power generation of the power system; The second unit is used to collect the real-time power demand of the power system load; The third unit is used to determine whether there is a power gap based on the power generation and the power demand. If so, the power gap electricity is collected and the energy storage module is used to release electric energy to make up for the power gap. If there is no power gap, the over-generated electricity is stored in the energy storage module.

[0012] In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method described in any embodiment of this specification is implemented.

[0013] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, enables the computer to execute the method described in any embodiment of this specification.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In this embodiment, the power generation of the new energy power plant is unstable, and the point demand of the load is also unstable. In order to coordinate the supply and demand relationship between the two, the control system is used to perform wide-area coordination according to the actual situation. Specifically, if the power generation of all power plants is greater than the power demand, the excess electricity will be stored in the energy storage module. If the power generation of all power plants is less than the power demand, the excess electricity stored in the energy storage module will be released to the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a flow chart of a method for wide-area coordinated operation of a power system provided by one embodiment of the present invention; Figure 2 is a hardware architecture diagram of an electronic device provided by an embodiment of the present invention; Figure 3 It is a structural diagram of a wide-area coordinated operation device of a power system provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] The specific implementation of the above concept is described below.

[0019] Please refer to Figure 1 , an embodiment of the present invention provides a wide-area coordinated operation method of a power system, comprising: Collect the real-time power generation of the power system; Collect the real-time power demand of the power system load; Determine whether there is a power gap based on power generation and power demand. If so, collect the power gap and use the energy storage module to release power to make up for the gap. If there is no power gap, store the excess power in the energy storage module.

[0020] In this embodiment, the power generation of the new energy power plant is unstable, and the point demand of the load is also unstable. In order to coordinate the supply and demand relationship between the two, the control system is used to perform wide-area coordination according to the actual situation. Specifically, if the power generation of all power plants is greater than the power demand, the excess electricity will be stored in the energy storage module. If the power generation of all power plants is less than the power demand, the excess electricity stored in the energy storage module will be released to the power grid.

[0021] In this embodiment, the energy storage module can be a water storage device and an air compression device. The water storage device is connected to a generator. The generator pumps water into the water storage device located at a high place to convert electrical energy into gravitational potential energy for storage. The water storage device is connected to a water turbine to convert gravitational potential energy into electrical energy for release in the form of water flow. The air compression device includes a compression chamber and a hydraulic chamber. The hydraulic chamber and the compression chamber are connected by a piston seal sliding connection. The hydraulic chamber is connected to the bottom of the water storage device. The air in the compression chamber is compressed by water pressure. The compression chamber is connected to an airflow power generation device to generate electricity through high-pressure airflow.

[0022] Select the water storage device to generate electricity and / or the air compression device to generate electricity according to the size of the power gap. When the power gap is greater than a first preset value, both the water storage device and the air compression device are selected to generate electricity. When the power gap is less than the first preset value and greater than a second preset value, the air compression device is selected to generate electricity. When the power gap is less than the second preset value, close the connecting channel between the hydraulic warehouse and the water storage device, select the water storage device to generate electricity, and wait until excess electricity is used to pump water to the water storage device so that the water level in the water storage device returns to the water level when the connecting channel is closed, and then open the connecting channel.

[0023] In some embodiments of the present invention, it further includes: Collect meteorological data to predict the power generation of new energy power plants and obtain predicted power generation; According to the historical power consumption, the load power consumption is predicted to obtain the predicted power demand; The predicted electricity gap is determined based on the predicted power generation and the predicted power demand; wherein the predicted power generation and the predicted power demand are predicted values ​​within the same future preset period; The predicted power gap is compared with the power currently stored in the energy storage module. When the predicted power gap is greater than the power currently stored in the energy storage module, the amount of power to be compensated for the predicted power gap and the power currently stored in the energy storage module is determined, and the power generation of the traditional power plant is adjusted according to the amount to be compensated and the future preset time period.

[0024] In this embodiment, in order to make the power system more stable and prevent the situation where the electricity stored in the energy storage module cannot supply the electricity gap, the power generation and demand are predicted to obtain the predicted power generation and the predicted electricity demand, and the predicted electricity consumption gap is obtained based on the two. It is determined whether the stored electric energy can fill the predicted electricity consumption gap based on the predicted electricity consumption gap and the current energy storage capacity of the energy storage module. If it cannot be filled, the amount of electricity to be compensated is calculated, and the power generation efficiency of the traditional power plant is adjusted according to the amount of electricity to be compensated, so as to increase the power generation increment of the traditional power plant in the future preset time period is greater than or equal to the amount of electricity to be compensated.

[0025] It should be noted that the same future preset time period means that the predicted power generation and the predicted electricity demand are both predicted values ​​for the next 24 hours or the next 48 hours. Of course, it can also be a prediction for a longer or shorter time period.

[0026] In the present invention, when regulating the power generation of a traditional power plant, if the rotor of the generator rotates too fast, it will cause the rotor to vibrate, which will affect the service life of the equipment and have an adverse effect on the frequency modulation of the power plant. Therefore, a heating device is provided on the bearing of the rotor of the generator, and the heating device can be a resistance heating device attached to the bearing. The vibration information of the rotor can be collected in real time, and a vibration sensor can be used to collect it, and it is determined whether to turn on the heating device based on the vibration information. Specifically, when the vibration frequency of the rotor is close to the resonance frequency, the heating device is turned on to heat the lubricating oil in the bearing, so that the viscosity of the lubricating oil becomes smaller, the system state at the rotor is changed, and then the resonance frequency is changed to prevent it from resonating. Since only the viscosity of the lubricating oil is reduced, the lubricating oil still has a certain lubricating effect, and will not significantly change the rotation speed of the rotor. At the same time, the lubricating oil still has a protective effect and will not cause obvious wear of the parts. In addition, when the amplitude of the rotor reaches a certain preset amplitude, the heating device can also be used to heat the lubricating oil in the bearing. The lubricating oil with reduced viscosity increases the friction, slightly preventing the rotation of the rotor, and at the same time stops providing power to the engine to generate electricity, so that it can slowly decelerate while maintaining a certain speed to prevent the rotor amplitude from being too large. At the same time, the power of other generators is increased to balance the power generation. It should be noted that a cooling device, such as a water cooling or air cooling device, can be set to cool the bearing after the rotor resumes stable rotation.

[0027] In some embodiments of the present invention, meteorological data is collected to predict the power generation of a new energy power plant to obtain the predicted power generation, including: Collect meteorological data to predict the power generation of new energy power plants and obtain the predicted power generation of new energy; According to the power generation efficiency of the current traditional power plants, the predicted power generation of the traditional power plants is predicted; The predicted power generation of new energy and traditional power plants is summed to get the predicted power generation.

[0028] In some embodiments of the present invention, adjusting the power generation of a traditional power plant according to the amount of electricity to be compensated and a future preset time period includes: The power generation increment per unit time is determined according to the amount of electricity to be compensated and the preset time period in the future, and the power generation of the traditional power plant is regulated by the power generation growth efficiency of the power generation increment per unit time.

[0029] In this embodiment, uniformly improving the power generation efficiency of traditional power plants can make the power system more stable.

[0030] In some embodiments of the present invention, meteorological data is collected to predict the power generation of a new energy power plant to obtain the predicted power generation of new energy, including: Collect historical meteorological data, extract feature vectors from meteorological data, normalize feature vectors obtained from different types of meteorological data, train neural networks based on the normalized data, optimize the data output by the neural network based on historical power generation data, and obtain a power generation model after training; Output the predicted power generation of new energy based on the predicted meteorological data and power generation model.

[0031] In some embodiments of the present invention, the meteorological data includes solar radiation intensity, air pollution index, cloud thickness, wind direction change, and wind speed change.

[0032] In some embodiments of the present invention, the load power consumption is predicted based on the historical power consumption to obtain the predicted power demand, including: Collect the annual historical electricity consumption in different years and the same period in the future preset time period; The predicted electricity demand is obtained based on the annual historical electricity consumption forecast.

[0033] In some embodiments of the present invention, it further includes: Setting a plurality of different future preset time periods to respectively predict the predicted power generation and the predicted power demand, to obtain a plurality of predicted power generation and predicted power demand; When multiple amounts of electricity to be compensated are obtained, the predicted power generation and predicted electricity demand in the future preset time period closest to the current time are selected, the amount of electricity to be compensated is calculated, and the power generation of the traditional power plant is adjusted according to the amount of electricity to be compensated.

[0034] In this embodiment, according to setting a plurality of future preset time periods of different lengths, such as the future 1 hour, the future 10 hours or the future 24 hours, a plurality of different lengths of to-be-compensated electricity are calculated (if the electricity of the current energy storage module cannot compensate for the predicted electricity gap), and the power generation of the traditional power plant is adjusted according to the to-be-compensated electricity predicted by the predicted value closest to the current time. For example, the forecast data for the future 1 hour and the forecast data for the future 10 hours both calculate the to-be-compensated electricity, and the adjustment is made according to the to-be-compensated electricity calculated for the future 1 hour. If the to-be-compensated electricity is not calculated for the future 1 hour (that is, the stored electricity of the current energy storage module can compensate for the predicted electricity demand), the forecast data for the future 10 hours and the forecast data for the future 24 hours both calculate the to-be-compensated electricity, and the adjustment is made according to the to-be-compensated electricity calculated for the future 10 hours.

[0035] like Figure 2 , Figure 3 As shown, an embodiment of the present invention provides a wide-area coordinated operation device for a power system. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. From the hardware level, Figure 2As shown, it is a hardware architecture diagram of an electronic device where a wide-area coordinated operation device of a power system provided by an embodiment of the present invention is located, except Figure 2 In addition to the processor, memory, network interface, and non-volatile memory shown, the electronic device in the embodiment may also include other hardware, such as a forwarding chip responsible for processing messages, etc. Taking software implementation as an example, Figure 3 As shown, as a device in a logical sense, the CPU of the electronic device in which it is located reads the corresponding computer program in the non-volatile memory into the memory and runs it. This embodiment provides a wide-area coordinated operation device of a power system, including: The first unit is used to collect the real-time power generation of the power system; The second unit is used to collect the real-time power demand of the power system load; The third unit is used to determine whether there is a power gap based on the power generation and the power demand. If so, the power gap electricity is collected and the energy storage module is used to release electric energy to make up for the power gap. If there is no power gap, the over-generated electricity is stored in the energy storage module.

[0036] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on a wide-area coordinated operation device for a power system. In other embodiments of the present invention, a wide-area coordinated operation device for a power system may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0037] The information interaction, execution process and other contents between the modules in the above-mentioned device are based on the same concept as the embodiment of the method of the present invention. For the specific contents, please refer to the description in the embodiment of the method of the present invention, and no further description is given here.

[0038] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a method for wide-area coordinated operation of a power system in any embodiment of the present invention is implemented.

[0039] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the processor executes a method for wide-area coordinated operation of a power system in any embodiment of the present invention.

[0040] Specifically, a system or device equipped with a storage medium can be provided, on which software program code that implements the functions of any of the above-mentioned embodiments is stored, and a computer (or CPU or MPU) of the system or device can be enabled to read and execute the program code stored in the storage medium.

[0041] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

[0042] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0043] In addition, it should be clear that the functions of any of the above embodiments can be implemented not only by executing the program code read by the computer, but also by enabling an operating system operating on the computer to complete part or all of the actual operations based on instructions from the program code.

[0044] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above-mentioned embodiments.

[0045] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical factors in the process, method, article or device including the elements.

[0046] A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., various media that can store program codes.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for wide-area coordinated operation of a power system, characterized in that: include: Collect the real-time power generation of the power system; Collect the real-time power demand of the power system load; It is determined whether there is a power gap based on the power generation and the power demand. If so, the power gap electricity is collected and the energy storage module is used to release electric energy to make up for the power gap. If there is no power gap, the over-generated electricity is stored in the energy storage module.

2. The method according to claim 1, characterized in that Also includes: Collect meteorological data to predict the power generation of new energy power plants and obtain predicted power generation; Predict the power consumption of the load based on the historical power consumption to obtain the predicted power demand; Determining a predicted electricity gap according to the predicted power generation and the predicted power demand; wherein the predicted power generation and the predicted power demand are predicted values ​​within the same future preset time period; The predicted power gap is compared with the power currently stored in the energy storage module. When the predicted power gap is greater than the power currently stored in the energy storage module, the amount of power to be compensated for the predicted power gap and the power currently stored in the energy storage module is determined, and the power generation of the traditional power plant is adjusted according to the amount to be compensated and the future preset time period.

3. The method according to claim 2, characterized in that The collecting of meteorological data to predict the power generation of the new energy power plant to obtain the predicted power generation includes: Collect meteorological data to predict the power generation of new energy power plants and obtain the predicted power generation of new energy; According to the power generation efficiency of the current traditional power plants, the predicted power generation of the traditional power plants is predicted; The predicted power generation of the new energy source and the predicted power generation of the traditional power plant are summed to obtain the predicted power generation.

4. The method according to claim 2, characterized in that: The adjusting the power generation of the traditional power plant according to the amount of electricity to be compensated and the future preset time period includes: The power generation increment per unit time is determined according to the amount of electricity to be compensated and the future preset time period, and the power generation of the traditional power plant is regulated by the power generation growth efficiency of increasing the power generation increment per unit time.

5. The method according to claim 3, characterized in that: The collecting of meteorological data to predict the power generation of the new energy power plant to obtain the predicted power generation of the new energy includes: Collect historical meteorological data, extract feature vectors from the meteorological data, normalize the feature vectors obtained from different types of meteorological data, train a neural network based on the normalized data, optimize the data output by the neural network based on historical power generation data, and obtain a power generation model after the training is completed; The predicted power generation of new energy is output according to the predicted meteorological data and the power generation model.

6. The method according to claim 2, characterized in that The method of predicting the load power consumption based on the historical power consumption to obtain the predicted power demand includes: Collecting the annual historical electricity consumption in different years and the same period of the future preset time period; The predicted electricity demand is obtained based on the annual historical electricity consumption forecast.

7. The method according to claim 2, characterized in that Also includes: Setting a plurality of different future preset time periods to respectively predict the predicted power generation and the predicted power demand, to obtain a plurality of the predicted power generation and the predicted power demand; When multiple amounts of electricity to be compensated are obtained, the predicted power generation and the predicted electricity demand in the future preset time period closest to the current time are selected, the amount of electricity to be compensated is calculated, and the power generation of the traditional power plant is adjusted according to the amount of electricity to be compensated.

8. A wide-area coordinated operation device for a power system, characterized in that: For implementing the method according to any one of claims 1 to 7, the device comprises: The first unit is used to collect the real-time power generation of the power system; The second unit is used to collect the real-time power demand of the power system load; The third unit is used to determine whether there is a power gap based on the power generation and the power demand. If so, the power gap electricity is collected and the energy storage module is used to release electric energy to make up for the power gap. If there is no power gap, the over-generated electricity is stored in the energy storage module.

9. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to execute the method according to any one of claims 1 to 7.

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