Frequency regulation and control method and device, equipment and storage medium

Abstract

The invention relates to a frequency regulation and control method and device, equipment and a storage medium. According to the invention, when the frequency change occurs in a certain area, other areas except the disturbance area are notified of the frequency change in time, and the frequencies of other areas are regulated and controlled before the frequency change reaches other areas, so that the deviation between the frequencies of other areas and the frequency of the disturbance area is in a certain range. The method can enable other areas to timely sense the frequency change, greatly reduces the influence of the frequency change on the frequencies of other areas, accurately regulates and controls the frequencies of other areas based on the power adjustment amount, and maintains the frequency stability of each area of the power system and the whole power system.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power grid control, and in particular to a frequency control method, device, equipment and storage medium. Background Art

[0002] In the operation and maintenance of modern power systems, ensuring the stability and safety of the system is a crucial task, and load frequency control (LFC) can maintain the frequency of the power system within a predetermined range to cope with the challenges brought by load changes.

[0003] However, the existing load frequency control strategy ignores the wave propagation effect of frequency changes in multi-region systems, resulting in time delays in frequency responses in different regions. When a disturbance region with large frequency changes appears in multiple regions, the frequency changes in the disturbance region will propagate to other regions, and the power adjustment equipment in other regions outside the disturbance region is difficult to perceive the frequency changes in time. The power adjustment is performed only after the frequency changes occur, causing the frequency of other regions to be disturbed, affecting the frequency stability of other regions. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a frequency control method, device, equipment and storage medium.

[0005] A first aspect of the present disclosure provides a frequency control method, comprising:

[0006] Obtain the frequency of each area in the power system;

[0007] Calculate the deviation between the frequency of each area and the standard frequency;

[0008] Determine an area where the deviation is greater than a first preset threshold as a disturbance area;

[0009] For each target region outside the disturbance region, calculating a target deviation between the frequency of the target region and the frequency of the disturbance region;

[0010] When the target deviation is greater than a second preset threshold, obtaining a total power optimization coefficient corresponding to the target area;

[0011] Determine the power adjustment amount of the target area based on the target deviation and the total power optimization coefficient;

[0012] The power adjustment device in the target area is controlled to output a target power corresponding to the power adjustment amount, so as to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within a second preset threshold based on the target power.

[0013] A second aspect of the present disclosure provides a frequency control device, comprising:

[0014] A first acquisition module is used to acquire the frequency of each area in the power system;

[0015] A first calculation module, used for calculating the deviation between the frequency of each area and the standard frequency;

[0016] A first determination module, configured to determine a region where the deviation is greater than a first preset threshold as a disturbance region;

[0017] A second calculation module is used to calculate, for each target area outside the disturbance area, a target deviation between the frequency of the target area and the frequency of the disturbance area;

[0018] A second acquisition module, used for acquiring a total power optimization coefficient corresponding to the target area when the target deviation is greater than a second preset threshold;

[0019] A second determination module is used to determine the power adjustment amount of the target area based on the target deviation and the total power optimization coefficient;

[0020] The control module is used to control the power adjustment device of the target area to output a target power corresponding to the power adjustment amount, so as to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within a second preset threshold based on the target power.

[0021] A third aspect of the present disclosure provides a computer device, including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the frequency control method of the first aspect can be implemented.

[0022] A fourth aspect of the present disclosure provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the frequency control method of the first aspect can be implemented.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0024] The present disclosure obtains the frequency of each area in the power system; calculates the deviation between the frequency of each area and the standard frequency; determines the area with a deviation greater than a first preset threshold as a disturbance area; for each target area outside the disturbance area, calculates the target deviation between the frequency of the target area and the frequency of the disturbance area; when the target deviation is greater than the second preset threshold, obtains the total power optimization coefficient corresponding to the target area; determines the power adjustment amount of the target area based on the target deviation and the total power optimization coefficient; controls the target power corresponding to the power adjustment amount of the power adjustment device of the target area to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within the second preset threshold based on the target power. The present disclosure can promptly notify other areas outside the disturbance area of ​​the frequency change when a frequency change occurs in a certain area, and regulate the frequency of other areas before the frequency change reaches other areas, so that the deviation between the frequency of other areas and the frequency of the disturbance area is within a certain range, so that other areas can perceive the frequency change in time, greatly reduce the impact of the frequency change on the frequency of other areas, accurately regulate the frequency of other areas based on the power adjustment amount, and maintain the stability of the frequency of each area of ​​the power system and the entire power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 is a flow chart of a frequency control method provided by an embodiment of the present disclosure;

[0028] Figure 2 is a flow chart of a method for determining a total power optimization coefficient provided by an embodiment of the present disclosure;

[0029] Figure 3 is a flow chart of a power adjustment method provided by an embodiment of the present disclosure;

[0030] Figure 4 is a flow chart of a control mode switching method provided by an embodiment of the present disclosure;

[0031] Figure 5 is a structural schematic diagram of a frequency control device provided by an embodiment of the present disclosure;

[0032] Figure 6It is a structural diagram of a computer device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0035] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0036] 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 sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0038] The frequency control method provided by the embodiment of the present disclosure can be executed by a computer device, which can be understood as any device with processing and computing capabilities. The device can include but is not limited to mobile terminals such as smart phones, laptops, tablet computers (PADs), etc., and fixed electronic devices such as digital TVs and desktop computers.

[0039] In order to better understand the inventive concept of the embodiments of the present disclosure, the technical solutions of the embodiments of the present disclosure are described below in conjunction with exemplary embodiments.

[0040] Figure 1 is a flow chart of a frequency control method provided by an embodiment of the present disclosure. The method can be executed by a computer device, which can be understood as any device with computing functions and processing capabilities. Figure 1 As shown, the frequency control method provided in this embodiment includes the following steps:

[0041] Step 110: Obtain the frequency of each area in the power system.

[0042] In the embodiment of the present disclosure, the power system may include multiple areas, each of which includes a generator and a battery energy storage system (BESS).

[0043] Computer equipment can obtain the frequency of each area within the power system.

[0044] In some embodiments, obtaining the frequency of each area in the power system may include steps 1101-1103:

[0045] Step 1101: For each region, obtain the voltage of each key node in the region.

[0046] In the disclosed embodiment, a region may include multiple key nodes, such as substations, power adjustment equipment, load centers, etc. These nodes are interconnected through power lines to jointly maintain the power supply and grid stability of the entire region. A phasor measurement unit (PMU) may be arranged at each key node in the region. The phasor measurement unit may collect the voltage and current of the key nodes.

[0047] For each area, the computer device can obtain the voltage of each key node in the area through the phasor measurement unit.

[0048] Step 1102: For each key node in the region, calculate the frequency value of the key node based on the voltage of the key node.

[0049] In the disclosed embodiment, for each key node in the region, the computer device may extract a voltage phase angle from the voltage of the key node, and calculate the frequency value of the key node according to the time change rate of the voltage phase angle.

[0050] Specifically, it can be calculated by formula (1):

[0051]

[0052] Among them, V y(t) represents the voltage of the key node y, and t represents time.

[0053] Step 1103: Calculate the weighted average of the frequency values ​​of all key nodes in the region to obtain the frequency of the region.

[0054] In the disclosed embodiment, the computer device may obtain the weight value corresponding to the frequency value of each key node in the region, and then calculate the weighted average of the frequency values ​​of all key nodes in the region to obtain the frequency of the region.

[0055] Step 120: Calculate the deviation between the frequency of each area and the standard frequency.

[0056] In the embodiment of the present disclosure, the computer device can calculate the deviation between the frequency of each area in the power system and the standard frequency.

[0057] Step 130: Determine the area where the deviation is greater than the first preset threshold as a disturbance area.

[0058] In the embodiment of the present disclosure, if the deviation between the frequency of an area and the standard frequency is greater than a first preset threshold, the computer device may determine the area as a disturbance area.

[0059] The first preset threshold can be set as needed and is not limited here.

[0060] Step 140: For each target area outside the disturbance area, calculate a target deviation between the frequency of the target area and the frequency of the disturbance area.

[0061] Step 150: When the target deviation is greater than a second preset threshold, obtain a total power optimization coefficient corresponding to the target area.

[0062] In an embodiment of the present disclosure, when a target deviation between the frequency of the target area and the frequency of the disturbance area is less than or equal to a second preset threshold, the computer device can determine that the target area is an area where frequency control is not required; when a target deviation between the frequency of the target area and the frequency of the disturbance area is greater than the second preset threshold, the computer device can determine that the target area is an area where frequency control is required, and then obtain the total power optimization coefficient corresponding to the target area.

[0063] The second preset threshold can be set as needed and is not limited here.

[0064] Step 160: Multiply the target deviation by the total power optimization coefficient to obtain the power adjustment amount of the target area.

[0065] Step 170: Control the power adjustment device in the target area to output a target power corresponding to the power adjustment amount, so as to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within a second preset threshold based on the target power.

[0066] In the embodiment of the present disclosure, the computer device can determine the target power corresponding to the power adjustment amount output by the power adjustment device of the target area. After the target area receives the target power, the frequency of the target area changes immediately. At this time, based on the target power, the target deviation between the frequency of the target area and the frequency of the disturbance area will be adjusted to within the second preset threshold, that is, the target deviation is less than or equal to the second preset threshold.

[0067] The embodiment of the present disclosure obtains the frequency of each area in the power system; calculates the deviation between the frequency of each area and the standard frequency; determines the area with a deviation greater than the first preset threshold as the disturbance area; for each target area outside the disturbance area, calculates the target deviation between the frequency of the target area and the frequency of the disturbance area; when the target deviation is greater than the second preset threshold, obtains the total power optimization coefficient corresponding to the target area; determines the power adjustment amount of the target area based on the target deviation and the total power optimization coefficient; controls the target power corresponding to the power adjustment amount of the power adjustment device of the target area to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within the second preset threshold based on the target power. The present disclosure can notify other areas outside the disturbance area of ​​the frequency change in a timely manner when a frequency change occurs in a certain area, and regulate the frequency of other areas before the frequency change reaches other areas, so that the deviation between the frequency of other areas and the frequency of the disturbance area is within a certain range, so that other areas can perceive the frequency change in time, greatly reduce the impact of the frequency change on the frequency of other areas, accurately regulate the frequency of other areas based on the power adjustment amount, and maintain the stability of the frequency of each area of ​​the power system and the entire power system.

[0068] In some embodiments of the present disclosure, to obtain the total power optimization coefficient corresponding to the target area, the computer device may execute Figure 2 A flow chart of a method for determining the total power optimization coefficient is provided, such as Figure 2 As shown, the method for determining the total power optimization coefficient provided in this embodiment may include the following steps:

[0069] Step 210: Obtain a response time constant of a power adjustment device in the current target area, a transmission delay time constant of a tie line from the target area to the disturbance area, and a maximum output power of the power adjustment device in the target area.

[0070] In the disclosed embodiment, the response time constant of the power regulating device describes the time required for the power regulating device (such as a generator set or an energy storage system) to respond to the frequency deviation instruction and reach a new steady-state power output. It reflects the dynamic response capability and speed of the power regulating device in frequency regulation. It can generally be obtained through parameters provided by the power regulating device manufacturer.

[0071] The transmission delay time constant of the interconnection line from the target area to the disturbance area can compensate for the frequency variation caused by the propagation delay caused by the wave propagation effect. In this way, even in areas with long physical distances, the impact of frequency disturbances can be mitigated by adjusting the control strategy in advance, thereby improving the system response speed and stability.

[0072] The maximum output power of the power adjustment device in the target area can be understood as the maximum output power that the generator and the battery energy storage system in the target area can currently provide.

[0073] In the disclosed embodiment, the computer device can obtain the response time constant of the power adjustment device in the current target area, the transmission delay time constant of the interconnection line from the target area to the disturbance area, and the maximum output power of the power adjustment device in the target area.

[0074] Step 220: Determine the total power optimization coefficient corresponding to the target area based on the mapping relationship between at least one parameter among the response time constant, the interconnection line transmission delay time constant, and the maximum output power and the power optimization coefficient.

[0075] In the embodiment of the present disclosure, a first mapping relationship between a response time constant of a power adjustment device and a power optimization coefficient, a second mapping relationship between a transmission delay time constant of a communication line and a power optimization coefficient, and a third mapping relationship between a maximum output power of the power adjustment device and the power optimization coefficient are pre-stored in a computer device.

[0076] The computer device can determine the total power optimization coefficient corresponding to the target area based on the mapping relationship between at least one of the following parameters: the response time constant of the power adjustment device in the target area, the transmission delay time constant of the communication line from the target area to the disturbance area, and the maximum output power of the power adjustment device in the target area and the power optimization coefficient.

[0077] In some embodiments, based on the mapping relationship between at least one parameter among the response time constant, the tie line transmission delay time constant, and the maximum output power and the power optimization coefficient, determining the total power optimization coefficient corresponding to the target area may include steps 2201-2203:

[0078] Step 2201: Determine a first power optimization sub-coefficient corresponding to a response time constant of a power adjustment device in a target area based on a first mapping relationship between a response time constant and a power optimization coefficient, wherein the first mapping relationship includes a negative correlation between the response time constant and the power optimization coefficient.

[0079] In the embodiment of the present disclosure, the first mapping relationship may include that the response time constant of the power adjustment device is negatively correlated with the power optimization coefficient, and the smaller the response time constant is, the larger the corresponding power optimization coefficient is.

[0080] Specifically, the first power optimization sub-coefficient k1 corresponding to the response time constant of the power adjustment device in the target area can be determined by formula (2):

[0081]

[0082] Among them, T response represents a response time constant of a power regulating device in the target area;

[0083] a is a proportional factor. The value of a usually depends on the base power of the power system in the target area, the target frequency regulation intensity and the regulation target. For example, when you want to achieve a stronger response capability in frequency regulation, you can set a larger value. The value of a can also be calibrated according to the characteristics and power level of the power system, as well as actual operating experience and historical data, to ensure that the frequency regulation strategy can meet the dynamic response requirements of the power system.

[0084] b is an exponential factor that can be used to represent the response time constant T of the first power optimization sub-coefficient. response The larger the value of b, the more sensitive the first power optimization sub-coefficient is to the change of the response time constant. The smaller the value of b, the less sensitive the first power optimization sub-coefficient is to the change of the response time constant.

[0085] Step 2202: Based on a second mapping relationship between the tie line transmission delay time constant and the power optimization coefficient, determine a second power optimization sub-coefficient corresponding to the tie line transmission delay time constant from the target area to the disturbance area, wherein the second mapping relationship includes a positive correlation between the tie line transmission delay time constant and the power optimization coefficient.

[0086] In the embodiment of the present disclosure, the second mapping relationship may include that the transmission delay time constant of the tie line from the target area to the disturbance area is positively correlated with the power optimization coefficient. The longer the transmission delay time constant of the tie line is, the larger the corresponding power optimization coefficient is.

[0087] Specifically, the second power optimization sub-coefficient k2 corresponding to the transmission delay time constant of the tie line from the target area to the disturbance area can be determined by formula (3):

[0088]

[0089] Among them, T line It indicates the transmission delay time constant of the tie line from the target area to the disturbance area, which is usually related to the length of the tie line, the electrical characteristics of the conductor (such as resistance, inductance) and the load condition;

[0090] c is a proportional factor used to adjust the size of the second power optimization sub-coefficient k2. The value of c is usually set according to the control objectives of the power system and actual operating experience. It can also be calibrated through historical data and simulation analysis to ensure that the frequency control effect remains stable under different interconnection line transmission characteristics.

[0091] d is an exponential factor used to represent the sensitivity of the second power optimization sub-coefficient k2 to the tie line transmission delay time constant. The larger the value of d, the more sensitive the second power optimization sub-coefficient k2 is to the tie line transmission delay time constant, and the smaller the value of d, the less sensitive the second power optimization sub-coefficient k2 is to the tie line transmission delay time constant.

[0092] Step 2203: Based on a third mapping relationship between the maximum output power and the power optimization coefficient, determine a third power optimization sub-coefficient corresponding to the maximum output power of the power adjustment device in the target area, wherein the third mapping relationship includes a logarithmic relationship between the maximum output power and the power optimization coefficient.

[0093] In the embodiment of the present disclosure, the third mapping relationship may include a logarithmic relationship between the maximum output power of the power adjustment device and the power optimization coefficient.

[0094] Specifically, the third power optimization sub-coefficient k3 corresponding to the maximum output power of the power adjustment device in the target area can be determined by formula (4):

[0095] k3=elog(P max +f) (4)

[0096] Among them, P max Indicates the maximum output power of the power adjustment equipment in the target area;

[0097] f is an offset (or translation) used to adjust the maximum output power, which can ensure that the third power optimization sub-coefficient k3 is controlled to maintain rationality and stability under different maximum output powers. When the value of f is large, it means that even when the maximum output power is small, the third power optimization sub-coefficient k3 can still maintain a large value, thereby increasing the regulation intensity; when the value of f is small, it means that the power system is more sensitive to small changes in the maximum output power, thereby improving the response to small power regulation capabilities.

[0098] Step 2204: perform weighted summation on at least one of the first power optimization sub-coefficient, the second power optimization sub-coefficient, and the third power optimization sub-coefficient to obtain a total power optimization coefficient corresponding to the target area.

[0099] In some embodiments, the weighted sum of at least one of the first power optimization sub-coefficient, the second power optimization sub-coefficient, and the third power optimization sub-coefficient to obtain a total power optimization coefficient corresponding to the target area may include S11-S13:

[0100] S11. Obtain a first weight factor corresponding to the first power optimization sub-coefficient, a second weight factor corresponding to the second power optimization sub-coefficient, and a third weight factor corresponding to the maximum output power.

[0101] Among them, the first weight factor, the second weight factor and the third weight factor can be determined based on system analysis and actual operating experience to ensure that the relative importance of each factor in the comprehensive frequency adjustment is reasonably reflected.

[0102] S12, calculating a first product of the first power optimization sub-coefficient and the first weight factor, a second product of the second power optimization sub-coefficient and the second weight factor, and a third product of the third power optimization sub-coefficient and the third weight factor.

[0103] S13. Sum the first product, the second product, and the third product to obtain a total power optimization coefficient corresponding to the target area.

[0104] Specifically, the total power optimization coefficient k corresponding to the target area can be calculated by formula (5):

[0105] k=w1k1+w2k2+w3k3(5)

[0106] Wherein, w1 represents the first weight factor corresponding to the first power optimization sub-coefficient k1;

[0107] w2 represents the second weight factor corresponding to the second power optimization sub-coefficient k2;

[0108] w3 represents the third weight factor corresponding to the third power optimization sub-coefficient k3.

[0109] Therefore, the total power optimization coefficient corresponding to the target area can be determined according to at least one parameter among the response time constant of the power adjustment device in the target area, the transmission delay time constant of the interconnection line from the target area to the disturbance area, and the maximum output power of the power adjustment device in the target area, and the influence of at least one factor among the response time constant of the power adjustment device in the target area, the transmission delay time constant of the interconnection line from the target area to the disturbance area, and the maximum output power of the power adjustment device in the target area on the regional power adjustment, so as to improve the accuracy of the power adjustment amount, and then accurately control the frequency of other areas based on the power adjustment amount to maintain the stability of the frequency of each area of ​​the power system and the entire power system.

[0110] In some embodiments of the present disclosure, the power adjustment device in the target area is controlled to output a target power corresponding to the power adjustment amount, and the computer device may execute Figure 3 A flow chart of a power adjustment method is provided, such as Figure 3 As shown, the power adjustment method provided in this embodiment may include the following steps:

[0111] Step 310, obtaining the maximum power that can be output by the battery energy storage system in the current target area, and when the maximum power is greater than or equal to the power adjustment amount, executing step 320; when the maximum power is less than the power adjustment amount, executing steps 330-350.

[0112] Step 320: When the maximum power is greater than or equal to the power adjustment amount, control the battery energy storage system in the target area to output a target power corresponding to the power adjustment amount.

[0113] In the embodiment of the present disclosure, when the maximum power that the battery energy storage system can output is greater than or equal to the power adjustment amount, it means that the power adjustment amount can be met by the battery energy storage system alone, and the computer device can control the battery energy storage system in the target area to output the target power corresponding to the power adjustment amount.

[0114] Step 330: When the maximum power is less than the power adjustment amount, control the battery energy storage system to output the maximum power.

[0115] In the embodiment of the present disclosure, when the maximum power that the battery energy storage system can output is less than the power adjustment amount, it means that the battery energy storage system alone cannot meet the power adjustment amount, and the computer device can control the battery energy storage system in the target area to output the maximum power.

[0116] Step 340: Calculate the difference between the power adjustment amount and the maximum power to obtain the remaining adjustment power.

[0117] Step 350: Control the generators in the target area to output the remaining adjusted power.

[0118] In this way, the regional battery energy storage system and generator can be coordinated to adjust the regional output power to meet the required power adjustment amount, improve the utilization efficiency of energy storage resources, and then accurately control the frequency of other regions based on the power adjustment amount to maintain the stability of the frequency of each region of the power system and the entire power system.

[0119] In some embodiments of the present disclosure, the power adjustment device in the target area is controlled to output a target power corresponding to the power adjustment amount, so that the target deviation between the frequency of the target area and the frequency of the disturbance area is adjusted to within a second preset threshold based on the target power. Then, the computer device may execute Figure 4 A flowchart of a control mode switching method is provided, such as Figure 4 As shown, the control mode switching method provided in this embodiment may include the following steps:

[0120] Step 410: When the target deviations between the frequencies of the target areas and the frequencies of the disturbance areas are all less than or equal to the second preset threshold, count the durations during which the target deviations are all less than or equal to the second preset threshold.

[0121] Step 420: When the duration is greater than the preset duration threshold, determine that the frequency of the power system to which each target area belongs is in a stable state.

[0122] In the embodiment of the present disclosure, when the duration during which each target deviation is less than or equal to the second preset threshold is greater than the preset duration threshold, the computer device can determine that the frequency of the power system to which each target area belongs is in a stable state.

[0123] The preset duration threshold can be set as needed and is not limited here.

[0124] Step 430: Switch the current frequency control mode of the power system to a preset control mode.

[0125] In the embodiment of the present disclosure, the preset regulation mode may be a primary frequency control PFC mode, or may be other frequency regulation modes, which is not limited here.

[0126] The current frequency control mode is an enhanced control mode. After determining that the frequency of the power system to which each target area belongs is in a stable state, the computer device can switch the current frequency control mode of the power system to a preset control mode.

[0127] Furthermore, the computer equipment smoothly switches the current frequency control mode of the power system to the preset control mode, that is, as time goes by, the impact of the enhanced control mode gradually weakens, and the influence of the preset control mode gradually increases, which can reduce the risk of system oscillations during the frequency control strategy conversion.

[0128] Therefore, after the frequency of the power system to which each target area belongs is in a stable state, the current frequency control mode of the power system can be switched to the preset control mode in time, ensuring that the power system can seamlessly connect to the conventional control strategy after the frequency is restored to stability, thereby improving the flexibility of frequency control.

[0129] Figure 5 is a schematic diagram of the structure of a frequency control device provided by an embodiment of the present disclosure, and the device can be understood as the above-mentioned computer device or a part of the functional modules in the above-mentioned computer device. Figure 5 As shown, the frequency control device 500 includes:

[0130] A first acquisition module 510 is used to acquire the frequency of each area in the power system;

[0131] A first calculation module 520, used for calculating the deviation between the frequency of each area and the standard frequency;

[0132] A first determination module 530, configured to determine a region where the deviation is greater than a first preset threshold as a disturbance region;

[0133] A second calculation module 540 is used to calculate, for each target area outside the disturbance area, a target deviation between the frequency of the target area and the frequency of the disturbance area;

[0134] A second acquisition module 550 is used to acquire a total power optimization coefficient corresponding to the target area when the target deviation is greater than a second preset threshold;

[0135] A second determination module 560, configured to determine a power adjustment amount for the target area based on the target deviation and the total power optimization coefficient;

[0136] The control module 570 is used to control the power adjustment device of the target area to output the target power corresponding to the power adjustment amount, so as to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within the second preset threshold based on the target power.

[0137] Optionally, the first acquisition module includes:

[0138] A first acquisition submodule is used to acquire, for each region, the voltage of each key node in the current region;

[0139] A first calculation submodule, configured to calculate, for each of the key nodes in the region, a frequency value of the key node based on a voltage of the key node;

[0140] The second calculation submodule is used to calculate the weighted average of the frequency values ​​of all key nodes in the region to obtain the frequency of the region.

[0141] Optionally, the second acquisition module includes:

[0142] A second acquisition submodule is used to acquire a response time constant of a power adjustment device in the current target area, a transmission delay time constant of a tie line from the target area to the disturbance area, and a maximum output power of the power adjustment device in the target area;

[0143] The first determination submodule is used to determine the total power optimization coefficient corresponding to the target area based on the mapping relationship between at least one parameter among the response time constant, the interconnection line transmission delay time constant, the maximum output power and the power optimization coefficient.

[0144] Optionally, the first determining submodule includes:

[0145] A first determining unit, configured to determine a first power optimization sub-coefficient corresponding to the response time constant based on a first mapping relationship between the response time constant and the power optimization coefficient, wherein the first mapping relationship includes a negative correlation between the response time constant and the power optimization coefficient;

[0146] A second determining unit, configured to determine a second power optimization sub-coefficient corresponding to the tie line transmission delay time constant based on a second mapping relationship between the tie line transmission delay time constant and the power optimization coefficient, wherein the second mapping relationship includes a positive correlation between the tie line transmission delay time constant and the power optimization coefficient;

[0147] A third determining unit, configured to determine a third power optimization sub-coefficient corresponding to the maximum output power based on a third mapping relationship between the maximum output power and the power optimization coefficient, wherein the third mapping relationship includes a logarithmic relationship between the maximum output power and the power optimization coefficient;

[0148] A summing unit is used to perform weighted summation on at least one of the first power optimization sub-coefficient, the second power optimization sub-coefficient and the third power optimization sub-coefficient to obtain a total power optimization coefficient corresponding to the target area.

[0149] Optionally, the summing unit includes:

[0150] an acquisition subunit, configured to acquire a first weight factor corresponding to the first power optimization sub-coefficient, a second weight factor corresponding to the second power optimization sub-coefficient, and a third weight factor corresponding to the maximum output power;

[0151] a calculation subunit, configured to calculate a first product of the first power optimization sub-coefficient and the first weight factor, a second product of the second power optimization sub-coefficient and the second weight factor, and a third product of the third power optimization sub-coefficient and the third weight factor;

[0152] A summing subunit is used to sum the first product, the second product and the third product to obtain a total power optimization coefficient corresponding to the target area.

[0153] Optionally, the control module includes:

[0154] A third acquisition submodule is used to obtain the maximum power that can be output by the battery energy storage system in the current target area;

[0155] A first control submodule, configured to control the battery energy storage system in the target area to output a target power corresponding to the power adjustment amount when the maximum power is greater than or equal to the power adjustment amount;

[0156] A second control submodule, configured to control the battery energy storage system to output the maximum power when the maximum power is less than the power adjustment amount;

[0157] A third calculation submodule is used to calculate the difference between the power adjustment amount and the maximum power to obtain the remaining adjustment power;

[0158] The third control submodule is used to control the generator in the target area to output the remaining adjusted power.

[0159] Optionally, the frequency control device includes:

[0160] a statistical module, configured to, when the target deviations between the frequency of each target area and the frequency of the disturbance area are all less than or equal to the second preset threshold, count the duration during which each of the target deviations is less than or equal to the second preset threshold;

[0161] A third determination module is used to determine that the power system to which each target area belongs is in a stable state when the duration is greater than a preset duration threshold;

[0162] A switching module is used to switch the current frequency control mode of the power system to a preset control mode.

[0163] The frequency control device provided in the embodiments of the present disclosure can implement the method of any of the above embodiments, and its execution method and beneficial effects are similar, which will not be repeated here.

[0164] The embodiments of the present disclosure also provide a computer device, which includes a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the method of any of the above embodiments can be implemented, and its execution method and beneficial effects are similar and will not be repeated here.

[0165] Figure 6 is a schematic diagram of the structure of a computer device provided by an embodiment of the present disclosure, such as Figure 6 As shown, the computer device 600 may include a processor 610 and a memory 620, wherein the memory 620 stores a computer program 621, and when the computer program 621 is executed by the processor 610, the method provided by any of the above embodiments can be implemented, and its execution method and beneficial effects are similar and will not be repeated here.

[0166] Of course, to simplify, Figure 6 Only some of the components related to the present invention in the computer device 600 are shown, and components such as a bus, an input / output interface, an input device, and an output device are omitted. In addition, according to specific application conditions, the computer device 600 may also include any other appropriate components.

[0167] An embodiment of the present disclosure provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method of any of the above embodiments can be implemented. The execution method and beneficial effects are similar and will not be repeated here.

[0168] The above-mentioned computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0169] The computer program may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the disclosed embodiments, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer device, partially on the user's device, as a separate software package, partially on the user's computer device and partially on a remote computer device, or entirely on a remote computer device or server.

[0170] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0171] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0172] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A frequency control method, characterized in that: include: Obtain the frequency of each area in the power system; Calculating the deviation between the frequency of each of the regions and the standard frequency; Determine the area where the deviation is greater than a first preset threshold as a disturbance area; For each target area outside the disturbance area, calculating a target deviation between a frequency of the target area and a frequency of the disturbance area; When the target deviation is greater than a second preset threshold, obtaining a total power optimization coefficient corresponding to the target area; Determining a power adjustment amount for the target area based on the target deviation and the total power optimization coefficient; The power adjustment device of the target area is controlled to output the target power corresponding to the power adjustment amount, so as to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within the second preset threshold based on the target power.

2. The method according to claim 1, characterized in that The obtaining of the frequency of each area in the power system includes: For each region, obtaining the voltage of each key node in the current region; For each of the key nodes in the region, based on the voltage of the key node, calculating the frequency value of the key node; The weighted average of the frequency values ​​of all key nodes in the region is calculated to obtain the frequency of the region.

3. The method according to claim 1, characterized in that: The obtaining of the total power optimization coefficient corresponding to the target area includes: Obtaining a response time constant of a power adjustment device in the current target area, a transmission delay time constant of a tie line from the target area to the disturbance area, and a maximum output power of the power adjustment device in the target area; Based on the mapping relationship between at least one parameter among the response time constant, the tie line transmission delay time constant, the maximum output power and the power optimization coefficient, the total power optimization coefficient corresponding to the target area is determined.

4. The method according to claim 3, characterized in that The determining of the total power optimization coefficient corresponding to the target area based on the mapping relationship between at least one parameter among the response time constant, the tie line transmission delay time constant, and the maximum output power and the power optimization coefficient comprises: Determining a first power optimization sub-coefficient corresponding to the response time constant based on a first mapping relationship between the response time constant and the power optimization coefficient, wherein the first mapping relationship includes a negative correlation between the response time constant and the power optimization coefficient; Determining a second power optimization sub-coefficient corresponding to the tie line transmission delay time constant based on a second mapping relationship between the tie line transmission delay time constant and the power optimization coefficient, wherein the second mapping relationship includes a positive correlation between the tie line transmission delay time constant and the power optimization coefficient; Determine, based on a third mapping relationship between the maximum output power and the power optimization coefficient, a third power optimization sub-coefficient corresponding to the maximum output power, wherein the third mapping relationship includes a logarithmic relationship between the maximum output power and the power optimization coefficient; A weighted sum is performed on at least one of the first power optimization sub-coefficient, the second power optimization sub-coefficient, and the third power optimization sub-coefficient to obtain a total power optimization coefficient corresponding to the target area.

5. The method according to claim 4, characterized in that The weighted summing of at least one of the first power optimization sub-coefficient, the second power optimization sub-coefficient, and the third power optimization sub-coefficient to obtain a total power optimization coefficient corresponding to the target area includes: Obtaining a first weight factor corresponding to the first power optimization sub-coefficient, a second weight factor corresponding to the second power optimization sub-coefficient, and a third weight factor corresponding to the maximum output power; Calculate a first product of the first power optimization sub-coefficient and the first weight factor, a second product of the second power optimization sub-coefficient and the second weight factor, and a third product of the third power optimization sub-coefficient and the third weight factor; The first product, the second product and the third product are summed to obtain a total power optimization coefficient corresponding to the target area.

6. The method according to claim 1, characterized in that The controlling the power adjustment device of the target area to output the target power corresponding to the power adjustment amount includes: Obtaining the maximum power that can be output by the battery energy storage system in the current target area; When the maximum power is greater than or equal to the power adjustment amount, controlling the battery energy storage system in the target area to output the target power corresponding to the power adjustment amount; When the maximum power is less than the power adjustment amount, controlling the battery energy storage system to output the maximum power; Calculating a difference between the power adjustment amount and the maximum power to obtain a remaining adjustment power; The generator in the target area is controlled to output the remaining adjusted power.

7. The method according to claim 1, characterized in that After controlling the power adjustment device of the target area to output the target power corresponding to the power adjustment amount, the method further includes: When the target deviations between the frequency of each target area and the frequency of the disturbance area are all less than or equal to the second preset threshold, counting the time duration during which each target deviation is less than or equal to the second preset threshold; When the duration is greater than a preset duration threshold, determining that the power system to which each target area belongs is in a stable state; The current frequency control mode of the power system is switched to a preset control mode.

8. A frequency control device, characterized in that: include: A first acquisition module is used to acquire the frequency of each area in the power system; A first calculation module, used for calculating the deviation between the frequency of each area and the standard frequency; A first determination module, configured to determine a region where the deviation is greater than a first preset threshold as a disturbance region; A second calculation module is used to calculate, for each target area outside the disturbance area, a target deviation between the frequency of the target area and the frequency of the disturbance area; A second acquisition module, configured to acquire a total power optimization coefficient corresponding to the target area when the target deviation is greater than a second preset threshold; A second determination module, configured to determine a power adjustment amount for the target area based on the target deviation and the total power optimization coefficient; The control module is used to control the power adjustment device of the target area to output the target power corresponding to the power adjustment amount, so as to adjust the target deviation between the frequency of the target area and the frequency of the disturbance area to within the second preset threshold based on the target power.

9. A computer device, characterized in that: include: A memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the frequency control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the frequency control method according to any one of claims 1 to 7 is implemented.

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