A power transmission control method and device, electronic equipment and storage medium

Abstract

Embodiments of the present application provide a power transmission control method and device, electronic equipment and storage medium, when the micro-grid is connected to the grid, first, periodically obtain the power output value and power absorption value of the energy storage device; then input multiple power output values and multiple power absorption values into a fitting model for processing to obtain power output fitting values and power absorption fitting values; the fitting model is constructed based on the ridge regression method; finally, according to the power output fitting value and the power absorption fitting value, it is judged whether the power transmission process of the energy storage device is smooth; if the power transmission process is not smooth, adjust the transmission power of the energy storage device, thereby avoiding the problem that the system is unstable and the power quality is affected due to the intermittency and randomness of renewable energy generation, the random switching of load and the process of micro-source grid connection, which is conducive to avoiding voltage and frequency fluctuations and ensuring stable operation of the system.

Description

Technical Field

[0001] This invention relates to the field of computer technology, and in particular to a power transmission control method, a power transmission control device, an electronic device, and a computer-readable storage medium. Background Technology

[0002] A microgrid is a small, modular, and distributed energy supply network based on distributed generation technology. It consists of small power plants located near distributed energy sources or users, combined with end-user power quality management systems and energy cascade utilization technologies. Microgrids typically operate in both off-grid and grid-connected modes. They can seamlessly switch between these two modes.

[0003] However, in microgrids, the intermittency and randomness of renewable energy generation such as wind power or photovoltaic power, the random switching of loads, and the process of micro-source grid connection can have a significant impact on the stable operation of the system and power quality, causing problems such as voltage and frequency fluctuations and even system instability. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention are proposed to provide a power transmission control method, a power transmission control device, an electronic device, and a computer-readable storage medium that overcome or at least partially solve the above problems.

[0005] To address the aforementioned problems, this invention discloses a power transmission control method applied to an energy storage control system in a microgrid. The energy storage control system controls the power transmission of energy storage devices. The method includes:

[0006] During grid-connected operation of the microgrid, the power output and power absorption values ​​of the energy storage device are periodically acquired.

[0007] Multiple power output values ​​and multiple power absorption values ​​are input into the fitting model for processing to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method.

[0008] Based on the power output fitting value and the power absorption fitting value, determine whether the power transmission process of the energy storage device is smooth;

[0009] If the power transmission process is not smooth, the transmission power of the energy storage device is adjusted.

[0010] Optionally, determining whether the power transmission process of the energy storage device is smooth based on the power output fitting value and the power absorption fitting value includes:

[0011] Calculate the difference between the power absorption fitted value and the power output fitted value;

[0012] The ratio of the difference to the power absorption fitting value is compared with a preset fitting threshold, and the power transmission process of the energy storage device is judged to be smooth based on the comparison result.

[0013] Optionally, comparing the ratio of the difference to the power absorption fitted value with a preset fitting threshold, and determining whether the power transmission process of the energy storage device is smooth based on the comparison result, includes:

[0014] Determine whether the ratio of the difference to the power absorption fitted value is not less than a preset fitting threshold;

[0015] If the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold, then the power transmission process of the energy storage device is not smooth.

[0016] If the ratio of the difference to the power absorption fitting value is less than a preset fitting threshold, then the power transmission process of the energy storage device is smooth.

[0017] Optionally, the energy storage device is connected to both the public power grid and the power generation equipment in the microgrid. The step of adjusting the transmission power of the energy storage device if the power transmission process is not smooth includes:

[0018] If the power transmission process is not smooth, the power absorbed by the energy storage device from the power generation device and the power absorbed by the energy storage device from the public power grid are adjusted.

[0019] Optionally, the energy storage control system is connected to the microgrid management system, and adjusting the transmission power of the energy storage device includes:

[0020] Receive power dispatch instructions sent by the microgrid management system;

[0021] Based on the power scheduling command, the transmission power of the energy storage device is adjusted.

[0022] Optionally, the energy storage device is connected to the public power grid, and adjusting the transmission power of the energy storage device based on the power dispatch command includes:

[0023] Based on the power scheduling command, determine the reference value of the filter capacitor voltage;

[0024] Based on the reference value of the filter capacitor voltage, the voltage amplitude and phase angle of the filter capacitor are adjusted to regulate the active and reactive power transmitted by the energy storage device.

[0025] Optionally, the step of periodically acquiring the power output and power absorption values ​​of the energy storage device during grid-connected operation of the microgrid includes:

[0026] When the microgrid is connected to the grid, the power output value and power absorption value of the energy storage device are acquired according to a preset acquisition cycle.

[0027] This invention also discloses a power transmission control device applied to an energy storage control system in a microgrid. The energy storage control system is used to control the power transmission of energy storage devices. The device includes:

[0028] The acquisition module is used to periodically acquire the power output value and power absorption value of the energy storage device when the microgrid is connected to the grid.

[0029] The processing module is used to input multiple power output values ​​and multiple power absorption values ​​into the fitting model for processing, so as to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method.

[0030] The judgment module is used to determine whether the power transmission process of the energy storage device is smooth based on the power output fitting value and the power absorption fitting value.

[0031] An adjustment module is used to adjust the transmission power of the energy storage device if the power transmission process is not smooth.

[0032] Optionally, the determination module includes:

[0033] The difference calculation submodule is used to calculate the difference between the power absorption fitted value and the power output fitted value;

[0034] The comparison submodule is used to compare the ratio of the difference to the power absorption fitting value with a preset fitting threshold, and to determine whether the power transmission process of the energy storage device is smooth based on the comparison result.

[0035] Optionally, the comparison submodule includes:

[0036] A fitting threshold determination unit is used to determine whether the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold.

[0037] The non-smoothness judgment unit is used to determine that the power transmission process of the energy storage device is non-smooth if the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold.

[0038] The smoothing judgment unit is used to smooth the power transmission process of the energy storage device if the ratio of the difference to the power absorption fitting value is less than a preset fitting threshold.

[0039] Optionally, the energy storage device is connected to both the public power grid and the power generation equipment in the microgrid, and the regulation module includes:

[0040] A power regulation submodule is used to adjust the power absorbed by the energy storage device from the power generation device and the power absorbed by the energy storage device from the public power grid if the power transmission process is not smooth.

[0041] Optionally, the energy storage control system is connected to the microgrid management system, and the regulation module includes:

[0042] The dispatch instruction receiving submodule is used to receive power dispatch instructions sent by the microgrid management system;

[0043] The transmission power regulation submodule is used to regulate the transmission power of the energy storage device based on the power scheduling command.

[0044] Optionally, the energy storage device is connected to the public power grid, and the transmission power regulation submodule includes:

[0045] A reference value determination unit is used to determine a reference value for the filter capacitor voltage based on the power scheduling command.

[0046] The voltage amplitude adjustment unit is used to adjust the voltage amplitude and phase angle of the filter capacitor according to the voltage reference value of the filter capacitor, so as to adjust the active power and reactive power transmitted by the energy storage device.

[0047] Optionally, the acquisition module includes:

[0048] The preset period acquisition submodule is used to acquire the power output value and power absorption value of the energy storage device according to the preset acquisition period when the microgrid is connected to the grid.

[0049] This invention also discloses an electronic device, including: a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the power transfer control method as described above.

[0050] This invention also discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the power transfer control method described above.

[0051] The embodiments of the present invention have the following advantages:

[0052] In this embodiment of the invention, during microgrid grid-connected operation, the energy storage control system first periodically acquires the power output and power absorption values ​​of the energy storage device. Then, it inputs multiple power output and power absorption values ​​into a fitting model constructed based on ridge regression for processing, obtaining power output fitting values ​​and power absorption fitting values. Finally, based on the power output and power absorption fitting values, it determines whether the power transmission process of the energy storage device is smooth. If the power transmission process is not smooth, the transmission power of the energy storage device is adjusted. This embodiment of the invention, by inputting the power output and power absorption values ​​into a fitting model constructed based on ridge regression to obtain power output and power absorption fitting values, and adjusting the transmission power of the energy storage device when it determines that the power transmission process is not smooth, avoids system instability and power quality issues caused by the intermittency and randomness of renewable energy generation, random load switching, and microgrid connection processes. This helps to avoid voltage and frequency fluctuations and ensures stable system operation. Attached Figure Description

[0053] Figure 1 This is a flowchart illustrating the steps of a power transmission control method provided in an embodiment of the present invention;

[0054] Figure 2 This is a flowchart of another power transmission control method provided in an embodiment of the present invention;

[0055] Figure 3 This is a structural block diagram of a power transmission control device provided in an embodiment of the present invention. Detailed Implementation

[0056] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] Microgrids typically operate in two modes: off-grid and grid-connected. To ensure the reliability of power supply to critical loads within the microgrid, for microgrids using energy storage as the grid power source, the energy storage management system needs to switch between these two modes based on actual conditions. In terms of control methods, this is mainly reflected in the energy storage PCS (process control systems) switching from the PQ control mode during grid-connected operation to the V / f control mode during off-grid operation, and from the V / f control mode during off-grid operation to the PQ control mode during grid-connected operation, so that other distributed power sources and loads within the microgrid can continue to operate.

[0058] Microgrids can operate off-grid, on-grid, and seamlessly switch between these two modes. However, in microgrids, the intermittent and random nature of renewable energy generation such as wind or solar power, random load switching, and the connection of micro-sources to the grid can significantly impact system stability and power quality, causing voltage and frequency fluctuations and even system instability. Furthermore, most micro-sources in microgrids are based on inverters or small-capacity asynchronous generators, resulting in low system inertia and insufficient damping. They lack the disturbance immunity of traditional power grids and cannot address the system instability and power quality issues caused by the intermittent and random nature of renewable energy generation, random load switching, and the connection of micro-sources to the grid.

[0059] One of the core concepts of this invention is that by inputting the power output value and power absorption value into a fitting model constructed based on the ridge regression method, the power output fitting value and power absorption fitting value are obtained. When it is determined that the power transmission process is not smooth, the transmission power of the energy storage device is adjusted, thereby avoiding the problems of system instability and power quality being affected by the intermittency and randomness of renewable energy power generation, random load switching, and micro-source grid connection. This helps to avoid voltage and frequency fluctuations and ensure the stable operation of the system.

[0060] Reference Figure 1 The diagram illustrates a flowchart of a power transmission control method according to an embodiment of the present invention. The method is applied to an energy storage control system in a microgrid, and the energy storage control system is used to control the power transmission of energy storage devices. Specifically, it may include the following steps:

[0061] Step 101: When the microgrid is connected to the grid, the power output value and power absorption value of the energy storage device are periodically acquired.

[0062] The power transmission control method of this invention can be applied to the energy storage control system in a microgrid. This energy storage control system can be used to control the power transmission of energy storage devices. When the microgrid is connected to the grid, the energy storage control system can input the power output value and the power absorption value into a fitting model constructed based on the ridge regression method for processing, obtain the power output fitting value and the power absorption fitting value, and determine whether the power transmission process of the energy storage device is smooth. This allows for real-time monitoring of the power transmission process of the energy storage device, and when the power transmission process is not smooth, the transmission power of the energy storage device can be adjusted, which helps to ensure the stable operation of the system.

[0063] When a microgrid is connected to the grid, it can exchange power through electrical connections with other grids. The energy storage control system can periodically acquire the power output and power absorption values ​​of the energy storage devices to determine whether the power transmission process of the energy storage devices is smooth.

[0064] In this embodiment of the invention, since microgrids may cause system instability during grid-connected operation, monitoring the power transmission process of energy storage devices and adjusting their transmission power helps ensure stable system operation. It should be noted that the above is merely an example of the invention. In specific implementations, monitoring the power transmission process of energy storage devices and adjusting their transmission power can also be implemented in other scenarios prone to system instability, such as random load switching and power generation using solar or wind energy, to ensure stable system operation.

[0065] Step 102: Input multiple power output values ​​and multiple power absorption values ​​into the fitting model for processing to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method.

[0066] The energy storage control system periodically acquires the power output and power absorption values ​​of the energy storage device, recording multiple power output and power absorption values. These multiple power output values ​​are then input into a fitting model for fitting to obtain a power output fitted value, which represents the model's predicted power output value of the energy storage device in the next cycle. Similarly, multiple power absorption values ​​are input into the fitting model for fitting to obtain a power absorption fitted value, which also represents the model's predicted power absorption value of the energy storage device in the next cycle.

[0067] Ridge regression is a biased estimation regression method used for collinear data analysis. Essentially, it's a modified least squares estimation method that sacrifices the unbiasedness of least squares, resulting in more realistic and reliable regression coefficients at the cost of some information loss and reduced accuracy. In this embodiment of the invention, by constructing a fitting model using ridge regression and processing the power output and power fitting values, more realistic and reliable power absorption and power output fitting values ​​can be obtained. This allows for monitoring the smoothness of the power transmission process of energy storage devices based on realistic and reliable data.

[0068] Step 103: Based on the power output fitting value and the power absorption fitting value, determine whether the power transmission process of the energy storage device is smooth.

[0069] The power transfer process of an energy storage device can be either a process where the energy storage device receives power from power generation equipment in other power grids or microgrids and outputs that power to loads in the microgrid, or a process where the energy storage device receives power from power generation equipment and outputs that power to loads in the microgrid and other power grids. Those skilled in the art should understand that the above power transfer process is merely an example of the present invention. In specific implementations, all power transfer processes can be monitored to adjust the transmitted power when the power transfer process is not smooth.

[0070] In this embodiment of the invention, after obtaining the power output fitting value and the power absorption fitting value through the model constructed based on the ridge regression method, the smoothness of the power transmission process of the energy storage device can be determined based on the fitting value.

[0071] Step 104: If the power transmission process is not smooth, adjust the transmission power of the energy storage device.

[0072] When it is determined that the power transmission process of the energy storage device is not smooth based on the power output fitting value and the power absorption fitting value, the transmission power of the energy storage device can be adjusted to ensure the stable operation of the system.

[0073] In this embodiment of the invention, during microgrid grid-connected operation, the energy storage control system first periodically acquires the power output and power absorption values ​​of the energy storage device. Then, it inputs multiple power output and power absorption values ​​into a fitting model constructed based on ridge regression for processing, obtaining power output fitting values ​​and power absorption fitting values. Finally, based on the power output and power absorption fitting values, it determines whether the power transmission process of the energy storage device is smooth. If the power transmission process is not smooth, the transmission power of the energy storage device is adjusted. This embodiment of the invention, by inputting the power output and power absorption values ​​into a fitting model constructed based on ridge regression to obtain power output and power absorption fitting values, and adjusting the transmission power of the energy storage device when it determines that the power transmission process is not smooth, avoids system instability and power quality issues caused by the intermittency and randomness of renewable energy generation, random load switching, and microgrid connection processes. This helps to avoid voltage and frequency fluctuations and ensures stable system operation.

[0074] Reference Figure 2 The diagram illustrates a flowchart of another power transmission control method provided by an embodiment of the present invention. The method is applied to an energy storage control system in a microgrid, and the energy storage control system is used to control the power transmission of energy storage devices. Specifically, it may include the following steps:

[0075] Step 201: When the microgrid is connected to the grid, the power output value and power absorption value of the energy storage device are periodically acquired.

[0076] The power transmission control method of this invention can be applied to the energy storage control system in a microgrid. This energy storage control system can be used to control the power transmission of energy storage devices. When the microgrid is connected to the grid, the energy storage control system can input the power output value and the power absorption value into a fitting model constructed based on the ridge regression method for processing, obtain the power output fitting value and the power absorption fitting value, and determine whether the power transmission process of the energy storage device is smooth. This allows for real-time monitoring of the power transmission process of the energy storage device, and when the power transmission process is not smooth, the transmission power of the energy storage device can be adjusted, which helps to ensure the stable operation of the system.

[0077] When a microgrid is connected to the grid, it can exchange power through electrical connections with other grids. The energy storage control system can periodically acquire the power output and power absorption values ​​of the energy storage devices to determine whether the power transmission process of the energy storage devices is smooth.

[0078] In this embodiment of the invention, since microgrids may cause system instability during grid-connected operation, monitoring the power transmission process of energy storage devices and adjusting their transmission power helps ensure stable system operation. It should be noted that the above is merely an example of the invention. In specific implementations, monitoring the power transmission process of energy storage devices and adjusting their transmission power can also be implemented in other scenarios prone to system instability, such as random load switching and power generation using solar or wind energy, to ensure stable system operation.

[0079] In an optional embodiment, step 201 may include: when the microgrid is running in grid-connected mode, acquiring the power output value and power absorption value of the energy storage device according to a preset acquisition cycle.

[0080] The preset acquisition period can be set to 1 hour. For example, the power output value and power absorption value of the energy storage device can be acquired at 1:00, at 2:00, and at 3:00. By acquiring data according to the preset period, multiple power output values ​​and multiple power absorption values ​​can be obtained regularly.

[0081] Step 202: Input multiple power output values ​​and multiple power absorption values ​​into the fitting model for processing to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method.

[0082] The energy storage control system periodically acquires the power output and power absorption values ​​of the energy storage device, recording multiple power output and power absorption values. These multiple power output values ​​are then input into a fitting model for fitting to obtain a power output fitted value, which represents the model's predicted power output value of the energy storage device in the next cycle. Similarly, multiple power absorption values ​​are input into the fitting model for fitting to obtain a power absorption fitted value, which also represents the model's predicted power absorption value of the energy storage device in the next cycle.

[0083] Ridge regression is a biased estimation regression method used for collinear data analysis. Essentially, it's a modified least squares estimation method that sacrifices the unbiasedness of least squares, resulting in more realistic and reliable regression coefficients at the cost of some information loss and reduced accuracy. In this embodiment of the invention, by constructing a fitting model using ridge regression and processing the power output and power fitting values, more realistic and reliable power absorption and power output fitting values ​​can be obtained. This allows for monitoring the smoothness of the power transmission process of energy storage devices based on realistic and reliable data.

[0084] Step 203: Calculate the difference between the power absorption fitted value and the power output fitted value.

[0085] In this embodiment of the invention, since the power output and power absorption of the energy storage device need to be kept in balance, by calculating the difference between the power absorption fitting value and the power output fitting value, the ratio of the difference to the power absorption fitting value can be used to determine whether the power output and power absorption of the energy storage device are in balance, that is, to determine whether the power transmission process of the energy storage device is smooth.

[0086] Step 204: Compare the ratio of the difference to the power absorption fitting value with a preset fitting threshold, and determine whether the power transmission process of the energy storage device is smooth based on the comparison result.

[0087] The power transfer process of an energy storage device can be either a process where the energy storage device receives power from power generation equipment in other power grids or microgrids and outputs that power to loads in the microgrid, or a process where the energy storage device receives power from power generation equipment and outputs that power to loads in the microgrid and other power grids. Those skilled in the art should understand that the above power transfer process is merely an example of the present invention. In specific implementations, all power transfer processes can be monitored to adjust the transmitted power when the power transfer process is not smooth.

[0088] In this embodiment of the invention, after obtaining the power output fitting value and the power absorption fitting value through the model constructed based on the ridge regression method, the difference between the fitting values ​​and the ratio of the power absorption fitting value can be compared with the preset fitting value to determine whether the power transmission process of the energy storage device is smooth.

[0089] In an optional embodiment, step 204 may include the following sub-steps S11-S13:

[0090] Sub-step S11: Determine whether the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold.

[0091] In sub-step S12, if the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold, then the power transmission process of the energy storage device is not smooth.

[0092] In sub-step S13, if the ratio of the difference to the power absorption fitting value is less than a preset fitting threshold, then the power transmission process of the energy storage device is smooth.

[0093] After calculating the difference between the power absorption fitted value and the power output fitted value, the ratio of this difference to the power absorption fitted value can be further calculated. This ratio can be used to characterize the stability of the power transmission process of the energy storage device. The smaller the ratio, the more stable the power transmission process; the larger the ratio, the more unstable the power transmission process. After calculating the ratio, it can be determined whether the ratio is not less than a preset fitting threshold. If the ratio is not less than the preset fitting threshold, the power transmission process of the energy storage device is not smooth; if the ratio is less than the preset fitting threshold, the power transmission process of the energy storage device is smooth. For example, the preset fitting threshold can be set to 10%. It should be noted that those skilled in the art can set other values ​​for the preset fitting threshold according to actual needs in practical applications, and this invention does not impose any limitations on this.

[0094] Step 205: If the power transmission process is not smooth, adjust the transmission power of the energy storage device.

[0095] In this embodiment of the invention, when it is determined that the power transmission process of the energy storage device is not smooth based on the power output fitting value and the power absorption fitting value, the transmission power of the energy storage device can be adjusted to ensure the stable operation of the system.

[0096] In an optional embodiment, the energy storage device can be connected to the public power grid and the power generation device in the microgrid, respectively. Step 205 may include: if the power transmission process is not smooth, adjusting the power absorbed by the energy storage device from the power generation device and the power absorbed by the energy storage device from the public power grid.

[0097] Energy storage devices can be connected to power generation devices in both the public grid and the microgrid. When the power transmission process of the energy storage device involves receiving power from the power generation devices in the public grid and the microgrid and transmitting the power output to the load in the microgrid, if it is determined that this power transmission process is not smooth, the power absorbed by the energy storage device from the power generation devices and the power absorbed by the energy storage device from the public grid can be adjusted.

[0098] In this embodiment of the invention, the uneven power transmission process is usually due to factors that cause system instability. For example, when some loads in a microgrid are not connected to the microgrid, if the energy storage device continues to input excessive power and then outputs that power to the loads accordingly, it can easily lead to system instability. Therefore, the power absorbed by the energy storage device can be adjusted to ensure system stability. It should be noted that the above-mentioned adjustment of the power absorbed by the energy storage device is merely an example of the present invention. In specific implementations, adjustments can be made based on different power transmission processes. The present invention does not impose limitations here. For example, in the power transmission process where the energy storage device receives power output from the generator and outputs that power to the loads in the microgrid and other power grids, only the power absorbed by the energy storage device from the generator can be adjusted.

[0099] In an optional embodiment, the energy storage control system is connected to the microgrid management system, and the step of adjusting the transmission power of the energy storage device in step 205 may include the following sub-steps S21-S22:

[0100] Sub-step S21: Receive power dispatch instructions sent by the microgrid management system.

[0101] Sub-step S22: Adjust the transmission power of the energy storage device based on the power scheduling command.

[0102] In this embodiment of the invention, when it is determined that the power transmission process of the energy storage device is not smooth, the energy storage control system can receive a power dispatching command sent by the microgrid management system, and then adjust the transmission power of the energy storage device based on the power dispatching command to adjust the transmission power to the power indicated by the power dispatching command.

[0103] In an optional embodiment, the energy storage device may be connected to the public power grid, and sub-step S22 may include the following sub-steps S221-S222:

[0104] Sub-step S221: Determine the reference value of the filter capacitor voltage based on the power scheduling command.

[0105] Sub-step S222: Based on the reference value of the filter capacitor voltage, adjust the voltage amplitude and phase angle of the filter capacitor to adjust the active power and reactive power transmitted by the energy storage device.

[0106] In this embodiment of the invention, after receiving the power dispatch instruction sent by the microgrid management system, the reference value of the filter capacitor voltage can be determined based on the power dispatch instruction, and the voltage amplitude and phase angle of the filter capacitor can be adjusted based on the reference value of the filter capacitor voltage, thereby adjusting the active power and reactive power transmitted by the energy storage device.

[0107] In this embodiment of the invention, during microgrid grid-connected operation, the energy storage control system first periodically acquires the power output and power absorption values ​​of the energy storage device. Then, it inputs multiple power output and power absorption values ​​into a fitting model constructed based on ridge regression for processing, obtaining power output fitting values ​​and power absorption fitting values. Finally, based on the power output and power absorption fitting values, it determines whether the power transmission process of the energy storage device is smooth. If the power transmission process is not smooth, the transmission power of the energy storage device is adjusted. This embodiment of the invention, by inputting the power output and power absorption values ​​into a fitting model constructed based on ridge regression to obtain power output and power absorption fitting values, and adjusting the transmission power of the energy storage device when it determines that the power transmission process is not smooth, avoids system instability and power quality issues caused by the intermittency and randomness of renewable energy generation, random load switching, and microgrid connection processes. This helps to avoid voltage and frequency fluctuations and ensures stable system operation.

[0108] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0109] Reference Figure 3 This diagram illustrates a structural block diagram of a power transmission control device provided by an embodiment of the present invention, applied to an energy storage control system in a microgrid. The energy storage control system is used to control the power transmission of energy storage devices, and the device may specifically include the following modules:

[0110] The acquisition module 301 is used to periodically acquire the power output value and power absorption value of the energy storage device when the microgrid is connected to the grid.

[0111] Processing module 302 is used to input multiple power output values ​​and multiple power absorption values ​​into the fitting model for processing, so as to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method.

[0112] The judgment module 303 is used to determine whether the power transmission process of the energy storage device is smooth based on the power output fitting value and the power absorption fitting value.

[0113] The adjustment module 304 is used to adjust the transmission power of the energy storage device if the power transmission process is not smooth.

[0114] In one optional embodiment, the determining module includes:

[0115] The difference calculation submodule is used to calculate the difference between the power absorption fitted value and the power output fitted value;

[0116] The comparison submodule is used to compare the ratio of the difference to the power absorption fitting value with a preset fitting threshold, and to determine whether the power transmission process of the energy storage device is smooth based on the comparison result.

[0117] In one optional embodiment, the comparison submodule includes:

[0118] A fitting threshold determination unit is used to determine whether the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold.

[0119] The non-smoothness judgment unit is used to determine that the power transmission process of the energy storage device is non-smooth if the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold.

[0120] The smoothing judgment unit is used to smooth the power transmission process of the energy storage device if the ratio of the difference to the power absorption fitting value is less than a preset fitting threshold.

[0121] In one optional embodiment, the energy storage device is connected to both the public power grid and the power generation equipment in the microgrid, and the regulation module includes:

[0122] A power regulation submodule is used to adjust the power absorbed by the energy storage device from the power generation device and the power absorbed by the energy storage device from the public power grid if the power transmission process is not smooth.

[0123] In one optional embodiment, the energy storage control system is connected to the microgrid management system, and the regulation module includes:

[0124] The dispatch instruction receiving submodule is used to receive power dispatch instructions sent by the microgrid management system;

[0125] The transmission power regulation submodule is used to regulate the transmission power of the energy storage device based on the power scheduling command.

[0126] In one optional embodiment, the energy storage device is connected to the public power grid, and the transmission power regulation submodule includes:

[0127] A reference value determination unit is used to determine a reference value for the filter capacitor voltage based on the power scheduling command.

[0128] The voltage amplitude adjustment unit is used to adjust the voltage amplitude and phase angle of the filter capacitor according to the voltage reference value of the filter capacitor, so as to adjust the active power and reactive power transmitted by the energy storage device.

[0129] In one optional embodiment, the acquisition module includes:

[0130] The preset period acquisition submodule is used to acquire the power output value and power absorption value of the energy storage device according to the preset acquisition period when the microgrid is connected to the grid.

[0131] In this embodiment of the invention, during microgrid grid-connected operation, the energy storage control system first periodically acquires the power output and power absorption values ​​of the energy storage device. Then, it inputs multiple power output and power absorption values ​​into a fitting model constructed based on ridge regression for processing, obtaining power output fitting values ​​and power absorption fitting values. Finally, based on the power output and power absorption fitting values, it determines whether the power transmission process of the energy storage device is smooth. If the power transmission process is not smooth, the transmission power of the energy storage device is adjusted. This embodiment of the invention, by inputting the power output and power absorption values ​​into a fitting model constructed based on ridge regression to obtain power output and power absorption fitting values, and adjusting the transmission power of the energy storage device when it determines that the power transmission process is not smooth, avoids system instability and power quality issues caused by the intermittency and randomness of renewable energy generation, random load switching, and microgrid connection processes. This helps to avoid voltage and frequency fluctuations and ensures stable system operation.

[0132] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0133] This invention also provides an electronic device, comprising:

[0134] It includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, it implements the various processes of the above-described power transfer control method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0135] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the power transmission control method embodiments described above and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0136] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0137] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, embodiments of the present invention can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0138] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0139] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0140] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0141] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0142] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0143] The above provides a detailed description of the power transmission control method, apparatus, electronic device, and storage medium provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A power transmission control method, characterized in that, The method is applied to an energy storage control system in a microgrid, the energy storage control system being used to control the power transmission of energy storage devices, and the method includes: During grid-connected operation of the microgrid, the power output and power absorption values ​​of the energy storage device are periodically acquired. Multiple power output values ​​and multiple power absorption values ​​are input into the fitting model for processing to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method. Based on the power output fitting value and the power absorption fitting value, determine whether the power transmission process of the energy storage device is smooth; If the power transmission process is not smooth, the transmission power of the energy storage device is adjusted. The step of determining whether the power transmission process of the energy storage device is smooth based on the power output fitting value and the power absorption fitting value includes: Calculate the difference between the power absorption fitted value and the power output fitted value; The ratio of the difference to the power absorption fitting value is compared with a preset fitting threshold, and the power transmission process of the energy storage device is judged to be smooth based on the comparison result. The step of comparing the ratio of the difference to the power absorption fitting value with a preset fitting threshold, and determining whether the power transmission process of the energy storage device is smooth based on the comparison result, includes: Determine whether the ratio of the difference to the power absorption fitted value is not less than a preset fitting threshold; If the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold, then the power transmission process of the energy storage device is not smooth. If the ratio of the difference to the power absorption fitting value is less than a preset fitting threshold, then the power transmission process of the energy storage device is smooth.

2. The method according to claim 1, characterized in that, The energy storage device is connected to both the public power grid and the power generation equipment in the microgrid. If the power transmission process is not smooth, adjusting the transmission power of the energy storage device includes: If the power transmission process is not smooth, the power absorbed by the energy storage device from the power generation device and the power absorbed by the energy storage device from the public power grid are adjusted.

3. The method according to claim 1, characterized in that, The energy storage control system is connected to the microgrid management system, and the adjustment of the transmission power of the energy storage device includes: Receive power dispatch instructions sent by the microgrid management system; Based on the power scheduling command, the transmission power of the energy storage device is adjusted.

4. The method according to claim 3, characterized in that, The energy storage device is connected to the public power grid, and the adjustment of the transmission power of the energy storage device based on the power dispatch command includes: Based on the power scheduling command, determine the reference value of the filter capacitor voltage; Based on the reference value of the filter capacitor voltage, the voltage amplitude and phase angle of the filter capacitor are adjusted to regulate the active and reactive power transmitted by the energy storage device.

5. The method according to claim 1, characterized in that, When the microgrid is connected to the grid, the power output and power absorption values ​​of the energy storage device are periodically acquired, including: When the microgrid is connected to the grid, the power output value and power absorption value of the energy storage device are acquired according to a preset acquisition cycle.

6. A power transmission control device, characterized in that, An energy storage control system for use in microgrids, the energy storage control system being used to control the power transmission of energy storage devices, the device comprising: The acquisition module is used to periodically acquire the power output value and power absorption value of the energy storage device when the microgrid is connected to the grid. The processing module is used to input multiple power output values ​​and multiple power absorption values ​​into the fitting model for processing, so as to obtain power output fitting values ​​and power absorption fitting values; the fitting model is constructed based on the ridge regression method. The judgment module is used to determine whether the power transmission process of the energy storage device is smooth based on the power output fitting value and the power absorption fitting value. An adjustment module is used to adjust the transmission power of the energy storage device if the power transmission process is not smooth. The judgment module includes: The difference calculation submodule is used to calculate the difference between the power absorption fitted value and the power output fitted value; The comparison submodule is used to compare the ratio of the difference to the power absorption fitting value with a preset fitting threshold, and to determine whether the power transmission process of the energy storage device is smooth based on the comparison result. The comparison submodule includes: A fitting threshold determination unit is used to determine whether the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold. The non-smoothness judgment unit is used to determine that the power transmission process of the energy storage device is non-smooth if the ratio of the difference to the power absorption fitting value is not less than a preset fitting threshold. The smoothing judgment unit is used to smooth the power transmission process of the energy storage device if the ratio of the difference to the power absorption fitting value is less than a preset fitting threshold.

7. An electronic device, characterized in that, include: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the power transfer control method as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the power transmission control method as described in any one of claims 1 to 5.

Images