Switching control method and device based on reactive power compensation

Abstract

The invention relates to the technical field of reactive power compensation, and discloses a switching control method and device based on reactive power compensation, and the method comprises the steps: obtaining the capacitance data and switching data of each capacitor branch; calculating power data corresponding to the power system based on a power algorithm; when it is detected that the power system meets the input control condition, calculating a capacity difference value corresponding to each capacitor branch according to the capacitance data and the power data of each capacitor branch; based on a switching strategy, according to the capacity difference value and the switching data, a first target capacitor branch meeting a capacitor switching condition is switched; and when it is detected that the power system meets the removal control condition, based on the switching strategy and according to the switching data, removing the second target capacitor branch meeting the capacitor removal condition. Therefore, the switching control flexibility and the switching control accuracy of the capacitor can be improved, the intelligent uniform switching of the capacitor is realized, the use safety of the capacitor is improved, and the service life of the capacitor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of reactive power compensation, and in particular to a switching control method and device based on reactive power compensation. Background Art

[0002] At present, in the power system, the existing switching strategy is usually to put multiple capacitors into operation according to a pre-set switching order. However, the implementation of this switching strategy is prone to the phenomenon that the capacitors with the highest order are often put into operation, while the capacitors with the lowest order are not in operation for a long time, which can easily cause the life of the capacitors with the highest order to decay much faster than that of the capacitors with the lowest order, and even easily cause the capacitors with the highest order to be damaged, posing a safety hazard.

[0003] Therefore, it is particularly important to propose a technical solution that can improve the switching control flexibility and switching control accuracy of capacitors to achieve intelligent capacitor switching, thereby improving the safety of capacitor use and extending the service life of capacitors. Summary of the invention

[0004] The present invention provides a switching control method and device based on reactive power compensation, which can improve the switching control flexibility and switching control accuracy of capacitors, and is conducive to realizing intelligent switching of capacitors, thereby improving the safety of capacitor use and extending the service life of capacitors.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a switching control method based on reactive power compensation, the method is applied to a reactive power compensation controller, and the reactive power compensation controller is used to control multiple capacitor branches, the method includes: The reactive power compensation controller obtains capacitance data corresponding to each of the capacitance branches and switching data corresponding to each of the capacitance branches; the switching data corresponding to each of the capacitance branches includes the switching frequency corresponding to the capacitance branch and the switching time corresponding to the capacitance branch; The reactive power compensation controller calculates power data corresponding to the power system based on a preset power algorithm; the power data includes a target reactive power required by the power system and a power factor corresponding to the power system; When the reactive power compensation controller detects that the power system meets the preset input control condition, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data corresponding to each capacitor branch and the power data; The reactive power compensation controller performs a switching operation on at least one first target capacitor branch that meets the capacitor switching condition corresponding to the switching strategy among all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching strategy is one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; When the reactive power compensation controller detects that the power system meets the preset cut-off control conditions, the reactive power compensation controller performs a cut-off operation on at least one second target capacitor branch that meets the capacitor cut-off conditions corresponding to the cut-off strategy among all the first target capacitor branches based on the cut-off strategy and according to the cut-off data corresponding to each capacitor branch.

[0006] A second aspect of the present invention discloses a switching control device based on reactive power compensation, the device comprising a reactive power compensation controller, and the reactive power compensation controller is used to control multiple capacitor branches, and the reactive power compensation controller comprises: An acquisition module, used to acquire capacitance data corresponding to each of the capacitance branches and switching data corresponding to each of the capacitance branches; the switching data corresponding to each of the capacitance branches includes the switching frequency corresponding to the capacitance branch and the input duration corresponding to the capacitance branch; A calculation module, used to calculate power data corresponding to the power system based on a preset power algorithm; the power data includes a target reactive power required by the power system and a power factor corresponding to the power system; The calculation module is further configured to calculate the capacity difference corresponding to each capacitor branch according to the capacitance data and the power data corresponding to each capacitor branch when the reactive power compensation controller detects that the power system meets the preset input control condition; A switching control module, configured to perform a switching operation on at least one first target capacitor branch that satisfies the capacitor switching condition corresponding to the switching strategy among all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching strategy is one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; The switching control module is also used to perform a switching operation on at least one second target capacitor branch that meets the capacitor cutting condition corresponding to the switching strategy among all the first target capacitor branches based on the switching strategy and according to the switching data corresponding to each of the capacitor branches when the reactive compensation controller detects that the power system meets a preset switching control condition.

[0007] As an optional implementation manner, in the second aspect of the present invention, the reactive power compensation controller further includes: A first detection module is used to detect the reactive power type corresponding to the reactive power currently existing in the power system; A first judgment module is used to judge whether there is inductive reactive power in the power system and whether the power factor is lower than a first preset factor according to the reactive power type; a determination module, configured to determine that the power system meets a preset input control condition when the first determination module determines that the power system has the inductive reactive power and the power factor is lower than the first preset factor; The determination module is further configured to determine that the power system does not meet a preset input control condition when the first determination module determines that the power system does not have the inductive reactive power or the power factor is higher than or equal to the first preset factor; and / or, The first judgment module is further used to judge whether there is capacitive reactive power in the power system and whether the power factor is higher than a second preset factor according to the reactive power type; wherein the second preset factor is higher than the first preset factor; The determination module is further configured to determine that the power system meets a preset removal control condition when the first determination module determines that the capacitive reactive power exists in the power system and the power factor is higher than the second preset factor; The determination module is further used to determine that the power system does not meet the preset removal control condition when the first judgment module determines that the capacitive reactive power does not exist in the power system or the power factor is lower than or equal to the second preset factor.

[0008] As an optional implementation, in the second aspect of the present invention, the specific manner in which the calculation module calculates the power data corresponding to the power system based on a preset power algorithm includes: Collecting sampling data corresponding to the power system; the sampling data includes the sampling quantity and the sampling instantaneous data corresponding to the sampling quantity; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current; Calculate voltage data and current data according to the sampled data; the voltage data includes a real voltage and an imaginary voltage; the current data includes a real current and an imaginary current; Calculate single-phase power data according to the voltage data and the current data; the single-phase power data includes A-phase power data, B-phase power data and C-phase power data; Power data corresponding to the electric power system is calculated according to the single-phase power data.

[0009] As an optional implementation, in the second aspect of the present invention, the switching control module performs a specific manner of switching operation on at least one first target capacitor branch that satisfies the capacitor input condition corresponding to the switching strategy in all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each of the capacitor branches and the switching data corresponding to each of the capacitor branches, including: Based on a preset sorting algorithm, according to the capacity difference corresponding to each of the capacitor branches, a difference sorting operation is performed on all the capacitor branches to obtain a capacitor branch sequence; wherein the capacitor branch sequence sorts all the capacitor branches in ascending order of the capacity difference, and the capacitor branch sequence includes all the capacitor branches and the sequence number corresponding to each of the capacitor branches; According to the determined switching strategy, determining target switching data required by the switching strategy from all the switching data; According to the switching strategy and the target switching data, a switching operation is sequentially performed on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy.

[0010] As an optional implementation, in the second aspect of the present invention, when the switching strategy is the frequency switching strategy, the target switching data includes all the switching frequencies; when the switching strategy is the duration switching strategy, the target switching data includes all the input durations; when the switching strategy is the comprehensive switching strategy, the target switching data includes all the switching frequencies and all the input durations; The specific manner in which the switching control module sequentially performs the switching operation on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy according to the switching strategy and the target switching data includes: According to the switching strategy, determine the number of branches put into operation, and select the capacitor branch with the first order and corresponding to the number of branches put into operation from the capacitor branch sequence as the first target capacitor branch; When the switching strategy is the frequency switching strategy or the duration switching strategy, determining a first switching order corresponding to each of the first target capacitor branches based on the ascending order of the target switching data, and performing a switching operation on each of the first target capacitor branches based on the first switching order; When the switching strategy is the comprehensive switching strategy, based on the ascending order of the switching frequencies, the second input order corresponding to each of the first target capacitor branches is determined; or, based on all the switching frequencies and all the input durations, the comprehensive switching score corresponding to each of the first target capacitor branches is determined, and based on the ascending order of the comprehensive switching scores, the second input order corresponding to each of the first target capacitor branches is determined; based on the second input order, a input operation is performed on each of the first target capacitor branches.

[0011] As an optional implementation, in the second aspect of the present invention, the input duration corresponding to each of the capacitor branches includes the historical accumulated input duration corresponding to the capacitor branch; The specific manner in which the switching control module performs a removal operation on at least one second target capacitor branch that meets the capacitor removal condition corresponding to the switching strategy in all the first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch includes: According to the switching strategy, determining the number of branches to be cut off; When the switching strategy is the frequency switching strategy or the duration switching strategy, determining a first removal order corresponding to each of the first target capacitor branches based on the descending order of the target switching data, and selecting the first target capacitor branch that is first sorted based on the first removal order and corresponds to the number of branch removals from all the first target capacitor branches as the second target capacitor branch, and then performing a removal operation on each of the second target capacitor branches based on the first removal order; When the switching strategy is the comprehensive switching strategy, the second removal order corresponding to each of the first target capacitor branches is determined based on the descending order of the switching frequency, and the first target capacitor branch that is ranked first in the second removal order and corresponds to the number of branch removals is selected from all the first target capacitor branches as the second target capacitor branch, and then based on the second removal order, a removal operation is performed on each of the second target capacitor branches.

[0012] As an optional implementation, in the second aspect of the present invention, the input duration corresponding to each of the capacitor branches also includes a single cumulative input duration of the capacitor branch in the current input operation; Wherein, the reactive power compensation controller further includes: A second judgment module is used for judging, for each of the first target capacitor branches, whether the single cumulative input time of the first target capacitor branch in the current input operation is greater than or equal to a preset time threshold when the switching strategy is the comprehensive switching strategy; The switching control module is further configured to, for each of the first target capacitor branches, determine the first target capacitor branch as a third target capacitor branch, and perform a forced removal operation on the third target capacitor branch when the second judgment module determines that the single cumulative input time of the first target capacitor branch in the current input operation is greater than or equal to the preset time threshold; A second detection module is used to detect whether there is a reactive power demand in the power system after the switching control module performs the forced removal operation on any of the third target capacitor branches; The switching control module is also used to select at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence according to the reactive power demand when it is detected that the power system has the reactive power demand, and perform the switching operation on each of the supplementary capacitor branches.

[0013] The third aspect of the present invention discloses another switching control device based on reactive power compensation, the device comprising: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute part or all of the steps of the switching control method based on reactive power compensation disclosed in the first aspect of the present invention.

[0014] The fourth aspect of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute part or all of the steps of the switching control method based on reactive power compensation disclosed in the first aspect of the present invention.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the reactive power compensation controller obtains the capacitance data corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching data corresponding to each capacitor branch includes the switching frequency corresponding to the capacitor branch and the input time corresponding to the capacitor branch; the reactive power compensation controller calculates the power data corresponding to the power system based on a preset power algorithm; the power data includes the target reactive power required by the power system and the power factor corresponding to the power system; when the reactive power compensation controller detects that the power system meets the preset input control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data and power data corresponding to each capacitor branch; the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data and power data corresponding to each capacitor branch; The compensation controller performs a switching operation on at least one first target capacitor branch that meets the capacitor switching conditions corresponding to the switching strategy among all capacitor branches based on the determined switching strategy, according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching strategy is one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; when the reactive power compensation controller detects that the power system meets the preset removal control conditions, the reactive power compensation controller performs a removal operation on at least one second target capacitor branch that meets the capacitor removal conditions corresponding to the switching strategy among all first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch. It can be seen that the implementation of the present invention can detect that the power system meets the preset input control conditions. The reactive compensation controller calculates the capacity difference corresponding to each capacitor branch according to the acquired capacitor data and the calculated target reactive power and power factor, and then based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch, performs the input operation on the first target capacitor branch that meets the capacitor input condition, and, when it is detected that the power system meets the preset removal control conditions, the reactive compensation controller performs the removal operation on the second target capacitor branch that meets the capacitor removal condition based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch. By flexibly selecting the switching strategy, the switching data of the capacitor can be flexibly and accurately analyzed, thereby flexibly and accurately determining the switching demand and switching order of the capacitor branch, thereby improving the switching control flexibility and switching control accuracy of the capacitor, and realizing the intelligent equalization of the capacitor, so that the life of all capacitors tends to be averaged, which is conducive to extending the service life of the capacitor, and is conducive to improving the safety of the use of the capacitor, and is conducive to improving the operation safety and operation stability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a flow chart of a switching control method based on reactive power compensation disclosed in an embodiment of the present invention; Figure 2 It is a flow chart of another switching control method based on reactive power compensation disclosed in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a switching control device based on reactive power compensation disclosed in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of another switching control device based on reactive power compensation disclosed in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of another switching control device based on reactive power compensation disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The present invention discloses a switching control method and device based on reactive power compensation. When it is detected that the power system meets the preset switching control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the acquired capacitor data and the calculated target reactive power and power factor, and then based on the switching strategy and comprehensively considering the switching frequency and / or the switching time corresponding to each capacitor branch, performs the switching operation on the first target capacitor branch that meets the capacitor switching conditions, and when it is detected that the power system meets the preset switching control conditions, the reactive power compensation controller performs the switching operation on the first target capacitor branch that meets the capacitor switching conditions based on the switching strategy and comprehensively considering the switching frequency and / or the switching time corresponding to each capacitor branch. The switching frequency and / or input time corresponding to the capacitor branch, and the removal operation of the second target capacitor branch that meets the capacitor removal conditions can be performed. By flexibly selecting the switching strategy, the switching data of the capacitor can be flexibly and accurately analyzed, so as to flexibly and accurately determine the switching demand and switching order of the capacitor branch. Therefore, the switching control flexibility and switching control accuracy of the capacitor can be improved, and the intelligent and balanced switching of the capacitor can be realized, so that the life of all capacitors tends to be average, which is beneficial to extend the service life of the capacitor, and is beneficial to improve the safety of the use of the capacitor, and is beneficial to improve the operation safety and stability of the power system. The following is a detailed description.

[0022] Embodiment 1 See also Figure 1 , Figure 1 is a flow chart of a switching control method based on reactive power compensation disclosed in an embodiment of the present invention. Figure 1 The described switching control method based on reactive power compensation can be applied to a switching control device based on reactive power compensation, and the switching control device can be applied to one of the smart terminals, smart devices, smart systems and servers for controlling the switching of capacitor branches in the power system, wherein the server may include a local server or a cloud server, which is not limited by the embodiment of the present invention; the method can also be applied to a reactive power compensation controller, and the reactive power compensation controller can be used to control multiple capacitor branches, which is not limited by the embodiment of the present invention; wherein, optionally, the reactive power compensation controller can be applied to the power system, and further optionally, the reactive power compensation controller can also be included in the switching control device, which is not limited by the embodiment of the present invention. Figure 1 As shown, the switching control method based on reactive power compensation may include the following operations: 101. A reactive power compensation controller obtains capacitance data corresponding to each capacitance branch and switching data corresponding to each capacitance branch.

[0023] In an embodiment of the present invention, each capacitor branch may include a capacitor, and optionally, each capacitor branch may also include multiple capacitors, which is not limited by the embodiment of the present invention; wherein, the capacitance data corresponding to each capacitor branch may include the reactive capacity corresponding to the capacitor contained in the capacitor branch, and the switching data corresponding to each capacitor branch may include the switching frequency corresponding to the capacitor branch and the input time corresponding to the capacitor branch; wherein, optionally, the switching frequency corresponding to each capacitor branch may include the number of times the capacitor branch is put into operation, and further optionally, may also include the input frequency of the capacitor branch, which is not limited by the embodiment of the present invention; wherein, optionally, the input time corresponding to each capacitor branch may include the historical cumulative input time corresponding to the capacitor branch and / or the single cumulative input time of the capacitor branch in the current input operation, which is not limited by the embodiment of the present invention.

[0024] 102. The reactive power compensation controller calculates the power data corresponding to the power system based on a pre-set power algorithm.

[0025] In an embodiment of the present invention, power data may include the target reactive power required by the power system corresponding to the reactive compensation controller and the power factor corresponding to the power system, wherein the power factor may be the power factor corresponding to the above-mentioned target reactive power; wherein, optionally, the power algorithm may be any Fourier transform algorithm, exemplarily, the power algorithm may be an FFT (Fast Fourier Transform) Fourier transform algorithm (also known as a fast Fourier transform algorithm), which is not limited in the embodiment of the present invention.

[0026] 103. When the reactive power compensation controller detects that the power system meets the preset input control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data and power data corresponding to each capacitor branch.

[0027] In an embodiment of the present invention, the reactive power compensation controller can obtain the capacity difference corresponding to each capacitor branch by calculating the difference between the target reactive power required by the above-mentioned power system and the reactive capacity corresponding to the capacitor included in each capacitor branch, which is not limited in the embodiment of the present invention.

[0028] 104. The reactive power compensation controller performs a switching operation on at least one first target capacitor branch that meets the capacitor switching condition corresponding to the switching strategy among all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch.

[0029] In the embodiment of the present invention, the switching strategy can be one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; wherein the frequency switching strategy is a switching strategy that uses the switching frequency as a switching control basis, the duration switching strategy is a switching strategy that uses the input duration as a switching control basis, and the comprehensive switching strategy is a switching strategy that uses the switching frequency and the input duration as a switching control basis. The input operation is used to control the selected first target capacitor branch to access the power system.

[0030] In the embodiment of the present invention, optionally, the switching strategy can be determined by the following method: The switching strategy is set by the corresponding management personnel of the power system; or, Based on the historical switching information corresponding to all capacitor branches, the influence coefficient of each candidate switching strategy on the life attenuation of all capacitor branches is evaluated; wherein the historical switching information includes the historical switching strategy, the capacitor switching situation corresponding to the historical switching strategy, and the change of the capacitor life corresponding to the historical switching strategy; the candidate switching strategies include the frequency switching strategy, the duration switching strategy and the comprehensive switching strategy; A candidate switching strategy with the smallest life decay influence coefficient is selected from all candidate switching strategies as the switching strategy; wherein, a smaller life decay influence coefficient is used to indicate that the candidate switching strategy has the smallest impact on the life decay rate of the capacitor branch, which is not limited in the embodiment of the present invention.

[0031] This can improve the flexibility and accuracy of determining the switching strategy, which is beneficial to further improve the switching control accuracy of the capacitor, thereby further delaying the life attenuation rate of the capacitor, and further helping to extend the service life of the capacitor.

[0032] 105. When the reactive power compensation controller detects that the power system meets the preset cut-off control conditions, the reactive power compensation controller performs a cut-off operation on at least one second target capacitor branch that meets the capacitor cut-off condition corresponding to the switching strategy among all first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch.

[0033] In the embodiment of the present invention, the removal operation is used to control the selected second target capacitor branch to be disconnected from the power system.

[0034] It can be seen that the method described in the embodiment of the present invention can be implemented when it is detected that the power system meets the preset input control conditions. The reactive compensation controller calculates the capacity difference corresponding to each capacitor branch according to the acquired capacitor data and the calculated target reactive power and power factor, and then based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch, performs the input operation on the first target capacitor branch that meets the capacitor input condition, and, when it is detected that the power system meets the preset removal control conditions, the reactive compensation controller performs the removal operation on the second target capacitor branch that meets the capacitor removal condition based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch, and can flexibly select the switching strategy, flexibly and accurately analyze the switching data of the capacitor, so as to flexibly and accurately determine the switching demand and switching order of the capacitor branch, so as to improve the switching control flexibility and switching control accuracy of the capacitor, and realize the intelligent equalization of the capacitor, so that the life of all capacitors tends to be average, which is conducive to extending the service life of the capacitor, and is conducive to improving the safety of the use of the capacitor, and is conducive to improving the operation safety and operation stability of the power system.

[0035] In an optional embodiment, the method may further include the following operations: The reactive power compensation controller detects the reactive power type corresponding to the reactive power currently existing in the power system.

[0036] Optionally, the specific method for the reactive power compensation controller to detect whether the power system meets the preset input control conditions may include: The reactive power compensation controller determines whether there is inductive reactive power in the power system and whether the power factor is lower than a first preset factor according to the reactive power type; When the reactive power compensation controller determines that the power system has inductive reactive power and the power factor is lower than the first preset factor, the reactive power compensation controller determines that the power system meets the preset input control condition; When the reactive power compensation controller determines that there is no inductive reactive power in the power system or the power factor is higher than or equal to the first preset factor, the reactive power compensation controller determines that the power system does not meet the preset input control condition.

[0037] Optionally, the specific method for the reactive power compensation controller to detect whether the power system meets the preset removal control condition may include: The reactive power compensation controller determines whether there is capacitive reactive power in the power system and whether the power factor is higher than a second preset factor according to the reactive power type; wherein the second preset factor is higher than the first preset factor; When the reactive power compensation controller determines that capacitive reactive power exists in the power system and the power factor is higher than a second preset factor, the reactive power compensation controller determines that the power system meets a preset removal control condition; When the reactive power compensation controller determines that there is no capacitive reactive power in the power system or the power factor is lower than or equal to the second preset factor, the reactive power compensation controller determines that the power system does not meet the preset removal control condition.

[0038] Exemplarily, the first preset factor may be 0.9, or may be other preset values, which is not limited in the embodiment of the present invention.

[0039] Exemplarily, the second preset factor may be 0.95, or may be other preset values, which is not limited in the embodiment of the present invention.

[0040] Optionally, the reactive power compensation controller may detect the reactive power type corresponding to the reactive power currently existing in the power system based on power data or circuit data of the power system (such as circuit response conditions, circuit impedance data), which is not limited in the embodiments of the present invention.

[0041] It can be seen that this optional embodiment can determine that the power system meets the input control conditions, that is, it determines that the capacitor needs to be put into operation when the reactive power compensation controller determines that the power system has inductive reactive power and the power factor is lower than the first preset factor. It can also determine that the power system meets the removal control conditions, that is, it determines that the capacitor needs to be removed when the reactive power compensation controller determines that the power system has capacitive reactive power and the power factor is higher than the second preset factor. This can improve the accuracy of the judgment of whether the power system meets the input control conditions or the removal control conditions, thereby helping to improve the reliability of the judgment results on whether the capacitor needs to be put into / cut off, and further help to improve the execution reliability of the input operation / removal operation, and further help to further improve the accuracy of the capacitor's switching control.

[0042] In yet another optional embodiment, the reactive power compensation controller calculates power data corresponding to the power system based on a preset power algorithm, which may include the following operations: The reactive power compensation controller collects sampling data corresponding to the power system; the sampling data includes the sampling quantity and the sampling instantaneous data corresponding to the sampling quantity; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current; The reactive power compensation controller calculates voltage data and current data according to the sampled data; the voltage data includes real voltage and imaginary voltage; the current data includes real current and imaginary current; The reactive power compensation controller calculates single-phase power data according to the voltage data and the current data; the single-phase power data includes A-phase power data, B-phase power data and C-phase power data; The reactive power compensation controller calculates the power data corresponding to the power system according to the single-phase power data.

[0043] Specifically, the sampled instantaneous voltage may include a single-phase sampled instantaneous voltage corresponding to each single phase, and the sampled instantaneous current may include a single-phase sampled instantaneous current corresponding to each single phase.

[0044] Specifically, the real voltage may include the single-phase real voltage corresponding to each single phase, the imaginary voltage may include the single-phase imaginary voltage corresponding to each single phase, the real current may include the single-phase real current corresponding to each single phase, and the imaginary current may include the single-phase imaginary current corresponding to each single phase; wherein each single phase may be one of phase A, phase B and phase C.

[0045] Among them, optionally, each single-phase power data (that is, any one of the A-phase power data, the B-phase power data and the C-phase power data) can respectively include single-phase active power, single-phase reactive power, single-phase apparent power and single-phase power factor; further optionally, the power data corresponding to the power system can include three-phase active power, three-phase reactive power, three-phase apparent power and three-phase power factor, among which the three-phase reactive power can be used as the target reactive power, and the three-phase power factor can be used as the power factor.

[0046] Optionally, in the specific manner in which the reactive power compensation controller calculates the voltage data and the current data according to the sampled data, for each single-phase (i.e., one of phase A, phase B, and phase C), the calculation method of the single-phase real voltage corresponding to the single phase, the single-phase imaginary voltage corresponding to the single phase, the single-phase real current corresponding to the single phase, and the single-phase imaginary current corresponding to the single phase may be specifically as follows:

[0047]

[0048]

[0049]

[0050] in, N is the number of samples, U i is the single-phase sampling instantaneous voltage, U re is the single-phase real voltage, U im is the single-phase imaginary voltage, I i is the single-phase sampling instantaneous current, I re is the single-phase real current, I imis the single-phase imaginary current.

[0051] And, taking the calculation of phase A power data as an example, the reactive power compensation controller calculates the single-phase power data according to the voltage data and current data, which can be expressed as follows:

[0052]

[0053]

[0054]

[0055] in, P a is the active power of phase A, Q a is the reactive power of phase A, S a is the apparent power of phase A, cosα a is the power factor of phase A, U rea is the real voltage of phase A, U ima is the imaginary voltage of phase A, I rea is the real current of phase A, I ima is the imaginary current of phase A.

[0056] Optionally, the reactive power compensation controller can calculate the power data corresponding to the power system according to the single-phase power data as follows:

[0057]

[0058]

[0059]

[0060] in, P a is the active power of phase A, P b is the active power of phase B, P c is the active power of phase C, P 3 is the three-phase active power, Q a is the reactive power of phase A, Q b is the reactive power of phase B, Q c is the reactive power of phase C,Q 3 is the three-phase reactive power, S is the three-phase apparent power, cosα 3 is the three-phase power factor.

[0061] In this way, through the above calculation formula, more accurate voltage data, current data, single-phase power data and power data corresponding to the power system can be calculated, which is beneficial to improve the calculation efficiency and accuracy of power data, and further beneficial to improve the accuracy of determining the input control conditions / removal control conditions and improve the calculation accuracy of the capacity difference of each subsequent capacitor branch.

[0062] It can be seen that this optional embodiment can collect the sampling data corresponding to the power system, calculate the real data and imaginary data of the voltage and current, and thus calculate the single-phase power data based on the voltage data and current data, and then integrate all the single-phase power data to calculate the power data of the power system. This can improve the accuracy of the analysis of the sampled instantaneous data, thereby improving the calculation accuracy of the real and imaginary parts of the voltage and current data, and improving the calculation accuracy and efficiency of the target reactive power and power factor required by the power system, which is beneficial to improving the calculation accuracy of the capacity difference of each subsequent capacitor branch.

[0063] Embodiment 2 See also Figure 2 , Figure 2 is a flow chart of a switching control method based on reactive power compensation disclosed in an embodiment of the present invention. Figure 2 The described switching control method based on reactive power compensation can be applied to a switching control device based on reactive power compensation, and the switching control device can be applied to one of the smart terminals, smart devices, smart systems and servers for controlling the switching of capacitor branches in the power system, wherein the server may include a local server or a cloud server, which is not limited by the embodiment of the present invention; the method can also be applied to a reactive power compensation controller, and the reactive power compensation controller can be used to control multiple capacitor branches, which is not limited by the embodiment of the present invention; wherein, optionally, the reactive power compensation controller can be applied to the power system, and further optionally, the reactive power compensation controller can also be included in the switching control device, which is not limited by the embodiment of the present invention. Figure 2 As shown, the switching control method based on reactive power compensation may include the following operations: 201. A reactive power compensation controller obtains capacitance data corresponding to each capacitance branch and switching data corresponding to each capacitance branch.

[0064] In the embodiment of the present invention, the switching data corresponding to each capacitor branch includes the switching frequency corresponding to the capacitor branch and the switching time corresponding to the capacitor branch.

[0065] 202. The reactive power compensation controller calculates power data corresponding to the power system based on a pre-set power algorithm.

[0066] In the embodiment of the present invention, the power data includes the target reactive power required by the power system and the power factor corresponding to the power system.

[0067] 203. When the reactive power compensation controller detects that the power system meets the preset input control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data and power data corresponding to each capacitor branch.

[0068] 204. The reactive power compensation controller performs a difference sorting operation on all capacitor branches based on a preset sorting algorithm according to the capacity difference corresponding to each capacitor branch, to obtain a capacitor branch sequence.

[0069] In an embodiment of the present invention, the capacitor branch sequence sorts all capacitor branches in ascending order of capacity difference, and the capacitor branch sequence includes all capacitor branches and the sequence number corresponding to each capacitor branch; wherein, exemplarily, in the capacitor branch sequence, the first capacitor branch (that is, the capacitor branch with the smallest sequence number) corresponds to the smallest capacity difference, and the last capacitor branch (that is, the capacitor branch with the largest sequence number) corresponds to the largest capacity difference. Optionally, the above sorting algorithm can be a bubbling algorithm or other types of sorting algorithms, which are not limited in the embodiment of the present invention.

[0070] 205. The reactive power compensation controller determines target switching data required by the switching strategy from all switching data according to the determined switching strategy.

[0071] In the embodiment of the present invention, the switching strategy may be one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy.

[0072] 206. The reactive power compensation controller sequentially performs switching operations on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy according to the switching strategy and the target switching data.

[0073] 207. When the reactive power compensation controller detects that the power system meets the preset cut-off control conditions, the reactive power compensation controller performs a cut-off operation on at least one second target capacitor branch that meets the capacitor cut-off condition corresponding to the switching strategy among all first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch.

[0074] In the embodiment of the present invention, for other detailed descriptions of steps 201 to 203 and step 207, please refer to the detailed descriptions of steps 101 to 103 and step 105 in the first embodiment, which will not be repeated in the embodiment of the present invention.

[0075] It can be seen that the method described in the embodiment of the present invention can be implemented when it is detected that the power system meets the preset input control conditions. The reactive compensation controller calculates the capacity difference corresponding to each capacitor branch according to the acquired capacitor data and the calculated target reactive power and power factor, and then based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch, performs the input operation on the first target capacitor branch that meets the capacitor input condition, and, when it is detected that the power system meets the preset removal control conditions, the reactive compensation controller performs the removal operation on the second target capacitor branch that meets the capacitor removal condition based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch, and can flexibly select the switching strategy, flexibly and accurately analyze the switching data of the capacitor, so as to flexibly and accurately determine the switching demand and switching order of the capacitor branch, so as to improve the switching control flexibility and switching control accuracy of the capacitor, and realize the intelligent equalization of the capacitor, so that the life of all capacitors tends to be average, which is conducive to extending the service life of the capacitor, and is conducive to improving the safety of the use of the capacitor, and is conducive to improving the operation safety and operation stability of the power system. In addition, the capacity difference of each capacitor branch can be sorted in ascending order through the reactive compensation controller to obtain a capacitor branch sequence, and then the target switching data required for analysis of the switching strategy is determined according to the switching strategy, and then the first target capacitor branch in the capacitor branch sequence that meets the capacitor input condition corresponding to the switching strategy is sequentially put into use. It is possible to first label the capacitor branches according to the capacity difference, and then sequentially put the capacitor branches into use based on the switching order required by different switching strategies. While improving the labeling efficiency and labeling orderliness of the capacitor branches, it is possible to improve the accuracy and flexibility of determining the order of capacitor branch input, which is beneficial to improving the accuracy of capacitor branch input control, and further beneficial to improving the accuracy of capacitor equalization.

[0076] In an optional embodiment, when the switching strategy is a frequency switching strategy, the target switching data includes all switching frequencies; when the switching strategy is a duration switching strategy, the target switching data includes all input durations; when the switching strategy is a comprehensive switching strategy, the target switching data includes all switching frequencies and all input durations; The reactive power compensation controller sequentially performs switching operations on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching conditions corresponding to the switching strategy according to the switching strategy and the target switching data, which may include the following operations: The reactive power compensation controller determines the number of branches put into operation according to the switching strategy, and selects the capacitor branch with the first order and corresponding number of branches put into operation from the capacitor branch sequence as the first target capacitor branch; When the switching strategy is a frequency switching strategy or a duration switching strategy, the reactive power compensation controller determines a first input order corresponding to each first target capacitor branch based on the ascending order of the target switching data, and performs a input operation on each first target capacitor branch based on the first input order; When the switching strategy is a comprehensive switching strategy, the reactive power compensation controller determines the second switching order corresponding to each first target capacitor branch based on the ascending order of switching frequencies; or, the reactive power compensation controller determines the comprehensive switching score corresponding to each first target capacitor branch according to all switching frequencies and all switching durations, and determines the second switching order corresponding to each first target capacitor branch based on the ascending order of the comprehensive switching scores; based on the second switching order, performs the switching operation on each first target capacitor branch.

[0077] Exemplarily, when it is determined that the number of branches put into operation is 2, two capacitor branches with sequence numbers 1 and 2 are selected from the capacitor branch sequence as the first target capacitor branch, which is not limited in the embodiment of the present invention.

[0078] Among them, exemplarily, when the switching strategy is a frequency switching strategy, the reactive power compensation controller determines the input order corresponding to each first target capacitor branch based on the ascending order of the switching frequency, and inputs the first target capacitor branch in sequence, that is, the first target capacitor branch with the least switching frequency is first put into operation, and the embodiment of the present invention is not limited to this.

[0079] Among them, exemplarily, when the switching strategy is a time switching strategy, the reactive power compensation controller determines the switching order corresponding to each first target capacitor branch based on the ascending order of the switching time (such as: historical cumulative switching time), and switches the first target capacitor branches in sequence, that is, the switching operation is performed on the first target capacitor branch with the shortest switching time first, and the embodiments of the present invention are not limited to this.

[0080] Wherein, illustratively, when the switching strategy is a comprehensive switching strategy, the reactive power compensation controller can determine the order of input corresponding to each first target capacitor branch based on the ascending order of switching frequency, and input the first target capacitor branch in sequence, that is, first perform the input operation on the first target capacitor branch with the least switching frequency; or it can be based on the ascending order of the comprehensive switching score, first perform the input operation on the first target capacitor branch with the lowest comprehensive switching score, which is not limited in the embodiment of the present invention. Wherein, the lower the comprehensive switching score, the slower the life decay rate of the capacitor branch and / or the longer the remaining service life of the capacitor branch.

[0081] It can be seen that this optional embodiment enables the reactive compensation controller to select the capacitor branch with the first order and the determined number of branches to be put into operation from the capacitor branch sequence as the first target capacitor branch, and when the switching strategy is a frequency switching strategy or a duration switching strategy, based on the ascending order of the target switching data, determine the first input order corresponding to each first target capacitor branch, and put each first target capacitor branch into operation in turn. It can also determine the second input order corresponding to each first target capacitor branch based on the ascending order of the switching frequency when the switching strategy is a comprehensive switching strategy; or, determine the corresponding second input order according to the comprehensive switching score of each first target capacitor branch determined by all switching frequencies and all input durations, and then put each first target capacitor branch into operation in turn based on the second input order. Different methods for determining the input order can be selected based on different switching strategies, which can further improve the flexibility and accuracy of determining the input order of the capacitor branch, thereby facilitating further improving the accuracy of the input control of the capacitor branch.

[0082] In this optional embodiment, optionally, the reactive power compensation controller determines the comprehensive switching score corresponding to each first target capacitor branch according to all switching frequencies and all switching durations, which may include the following operations: The reactive power compensation controller obtains the frequency calculation coefficient and the duration calculation coefficient; For each first target capacitor branch, the reactive power compensation controller calculates a frequency score corresponding to the first target capacitor branch according to a switching frequency and a frequency calculation coefficient corresponding to the first target capacitor branch; For each first target capacitor branch, the reactive power compensation controller calculates a duration score corresponding to the first target capacitor branch according to the input duration and the duration calculation coefficient corresponding to the first target capacitor branch; For each first target capacitor branch, the reactive power compensation controller calculates a comprehensive switching score corresponding to the first target capacitor branch according to the frequency score and the duration score.

[0083] Optionally, the sum of the frequency score and the duration score may be calculated as the comprehensive switching score corresponding to each first target capacitor branch.

[0084] It can be seen that this optional embodiment can also calculate the frequency score and duration score for each first target capacitor branch respectively when the switching strategy is a comprehensive switching strategy, and then comprehensively analyze to obtain the comprehensive switching score of the first target capacitor branch, thereby improving the evaluation accuracy of the comprehensive switching score of each capacitor branch under the comprehensive switching strategy, which is beneficial to improving the accuracy of determining the second input order, and further beneficial to further improving the accuracy of the input control of the capacitor branch.

[0085] In this optional embodiment, optionally, for each first target capacitor branch, the method may further include the following operations: Detecting whether there is abnormal switching information corresponding to the first target capacitor branch in the acquired historical switching information; wherein the abnormal switching information is used to indicate that the first target capacitor branch has an abnormality / fault in the historical switching process; When abnormal switching information corresponding to the first target capacitor branch is detected in the historical switching information, the abnormality score corresponding to the first target capacitor branch is determined according to the abnormal switching information; wherein, the higher the abnormality score, the higher the possibility that the first target capacitor branch currently has an abnormal situation.

[0086] Optionally, for each first target capacitor branch, calculating the comprehensive switching score corresponding to the first target capacitor branch according to the frequency score and the duration score may include the following operations: When there is an abnormal score corresponding to the first target capacitor branch, the sum of the frequency score, the duration score and the abnormal score is calculated as the comprehensive switching score corresponding to the first target capacitor branch.

[0087] It can be seen that this optional embodiment can also evaluate the abnormality score of the first target capacitor branch by detecting the abnormal switching information of the first target capacitor branch when the switching strategy is a comprehensive switching strategy, thereby comprehensively evaluating the comprehensive switching score of the first target capacitor branch by comprehensively considering the frequency score, duration frequency score and abnormality score. It can improve the scoring flexibility and comprehensiveness of the capacitor branch through more diversified scoring dimensions, which is conducive to further improving the evaluation accuracy of the comprehensive switching score, and further conducive to improving the accuracy of determining the second input order.

[0088] In this optional embodiment, optionally, the investment duration corresponding to each capacitor branch includes the historical accumulated investment duration corresponding to the capacitor branch; The reactive power compensation controller performs a removal operation on at least one second target capacitor branch that meets the capacitor removal condition corresponding to the switching strategy among all first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch, which may include the following operations: The reactive power compensation controller determines the number of branch cuts according to the switching strategy; When the switching strategy is a frequency switching strategy or a duration switching strategy, the reactive power compensation controller determines the first removal order corresponding to each first target capacitor branch based on the descending order of the target switching data, and selects the first target capacitor branch that is ranked first in the first removal order and corresponds to the number of branch removals from all the first target capacitor branches as the second target capacitor branch, and then performs a removal operation on each second target capacitor branch based on the first removal order; When the switching strategy is a comprehensive switching strategy, the reactive compensation controller determines the second cutting order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and selects the first target capacitor branch that is ranked first in the second cutting order and corresponds to the number of branch cuttings from all the first target capacitor branches as the second target capacitor branch, and then performs the cutting operation on each second target capacitor branch based on the second cutting order.

[0089] Among them, illustratively, taking the number of branch cuts as 2 as an example, when the switching strategy is a frequency switching strategy, the reactive compensation controller determines the cutting order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and uses the first two first target capacitor branches as the second target capacitor branches and cuts them off in sequence, that is, the second target capacitor branch with the largest switching frequency is first cut off, and the embodiment of the present invention is not limited. Exemplarily, when the switching strategy is a duration switching strategy, the reactive compensation controller determines the cutting order corresponding to each first target capacitor branch based on the descending order of the input duration, and uses the first two first target capacitor branches as the second target capacitor branches and cuts them off in sequence, that is, the second target capacitor branch with the longest input duration is first cut off, and the embodiment of the present invention is not limited. Exemplarily, when the switching strategy is a comprehensive switching strategy, the reactive power compensation controller can determine the excision order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and use the first two first target capacitor branches as the second target capacitor branches and cut them off in sequence, that is, first perform the excision operation on the second target capacitor branch with the highest switching frequency, which is not limited to the embodiments of the present invention.

[0090] It can be seen that this optional embodiment can also determine the first excision order of each first target capacitor branch based on the descending order of the switching frequency / the switching time when the switching strategy is a frequency switching strategy or a duration switching strategy, and screen and cut off the second target capacitor branch in sequence, and then cut off the second target capacitor branch in sequence when the switching strategy is a comprehensive switching strategy. It can also determine the second excision order corresponding to each first target capacitor branch based on the descending order of the switching frequency when the switching strategy is a frequency switching strategy or a duration switching strategy, and screen and cut off the second target capacitor branch in sequence, and then cut off each second target capacitor branch in sequence. Different excision order determination methods can be selected based on different switching strategies, which can further improve the flexibility and accuracy of determining the excision order of the capacitor branch, thereby facilitating further improving the excision control accuracy of the capacitor branch, improving the accuracy of the equalization control of the capacitor, and further facilitating extending the service life of the capacitor.

[0091] In this optional embodiment, optionally, the input duration corresponding to each capacitor branch also includes a single cumulative input duration of the capacitor branch in the current input operation; The method may further include the following operations: When the switching strategy is a comprehensive switching strategy, for each first target capacitor branch, the reactive power compensation controller determines whether the single cumulative switching time of the first target capacitor branch in the current switching operation is greater than or equal to a preset time threshold; For each first target capacitor branch, when the reactive power compensation controller determines that the single cumulative input time of the first target capacitor branch in the current input operation is greater than or equal to the preset time threshold, the reactive power compensation controller determines the first target capacitor branch as the third target capacitor branch, and performs a forced removal operation on the third target capacitor branch; After the reactive power compensation controller performs a forced removal operation on any third target capacitor branch, the reactive power compensation controller detects whether there is reactive power demand in the power system; When the reactive power compensation controller detects that there is reactive power demand in the power system, the reactive power compensation controller selects at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence according to the reactive power demand, and performs a start-up operation on each supplementary capacitor branch.

[0092] Among them, optionally, the above operation can be performed at any time after any first target capacitor branch is put into use; the above operation can also be performed at any time after it is detected that the power system meets the preset cut-off control conditions; the above operation can also be performed at any time after the cut-off operation is performed on the second target capacitor branch, and the embodiments of the present invention are not limited thereto.

[0093] Among them, optionally, the preset time threshold may be a set value pre-set by a management personnel, or may be an empirical value determined based on the capacitor switching situation corresponding to the historical switching strategy, which is not limited in the embodiment of the present invention.

[0094] It can be seen that this optional embodiment can also forcibly cut off the first target capacitor branch when the switching strategy is a comprehensive switching strategy. If the single cumulative input time of any first target capacitor branch of the reactive compensation controller exceeds the preset time threshold, the first target capacitor branch can be forcibly cut off. This can more effectively and accurately control the input time of the capacitor branch and avoid long-term operation of the capacitor branch, thereby further improving the switching control accuracy of the capacitor branch, which is beneficial to further improve the service life of the capacitor; and, if it is detected that there is still reactive power demand after forced switching, other capacitors can be additionally put into use, so as to further improve the accuracy of the equalization control of the capacitor branch while meeting the reactive power demand of the power system.

[0095] Embodiment 3 See also Figure 3 , Figure 3 1 is a schematic diagram of a switching control device based on reactive power compensation disclosed in an embodiment of the present invention. Figure 3The switching control device based on reactive power compensation described can be applied to one of the intelligent terminals, intelligent devices, intelligent systems and servers for controlling the switching of capacitor branches in the power system, wherein the server may include a local server or a cloud server, which is not limited in the embodiment of the present invention; further, the device may include a reactive power compensation controller, which is not limited in the embodiment of the present invention. Figure 3 As shown, the device includes a reactive power compensation controller 30, and the reactive power compensation controller is used to control multiple capacitor branches. The reactive power compensation controller 30 may include: The acquisition module 301 is used to acquire capacitance data corresponding to each capacitance branch and switching data corresponding to each capacitance branch; the switching data corresponding to each capacitance branch includes the switching frequency corresponding to the capacitance branch and the input time corresponding to the capacitance branch; The calculation module 302 is used to calculate the power data corresponding to the power system based on a preset power algorithm; the power data includes the target reactive power required by the power system and the power factor corresponding to the power system; The calculation module 302 is further used to calculate the capacity difference corresponding to each capacitor branch according to the capacitance data and power data corresponding to each capacitor branch when the reactive power compensation controller detects that the power system meets the preset input control condition; The switching control module 303 is used to perform a switching operation on at least one first target capacitor branch that meets the capacitor switching condition corresponding to the switching strategy among all capacitor branches based on the determined switching strategy, according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching strategy is one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; The switching control module 303 is also used to perform a switching operation on at least one second target capacitor branch that meets the capacitor cutting condition corresponding to the switching strategy among all first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch when the reactive power compensation controller detects that the power system meets the preset cutting control condition.

[0096] It can be seen that the device described in the embodiment of the present invention can detect that the power system meets the preset input control conditions. The reactive compensation controller calculates the capacity difference corresponding to each capacitor branch based on the acquired capacitor data and the calculated target reactive power and power factor, and then based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch, performs the input operation on the first target capacitor branch that meets the capacitor input condition, and, when it is detected that the power system meets the preset removal control conditions, the reactive compensation controller performs the removal operation on the second target capacitor branch that meets the capacitor removal condition based on the switching strategy and comprehensively considers the switching frequency and / or input duration corresponding to each capacitor branch. The switching strategy can be flexibly selected to flexibly and accurately analyze the switching data of the capacitor, thereby flexibly and accurately determining the switching demand and switching order of the capacitor branch, thereby improving the switching control flexibility and switching control accuracy of the capacitor, and realizing the intelligent equalization of the capacitor, so that the life of all capacitors tends to be averaged, which is beneficial to extending the service life of the capacitor, and is beneficial to improving the safety of the use of the capacitor, and is beneficial to improving the operation safety and operation stability of the power system.

[0097] In an optional embodiment, if Figure 4 As shown, the reactive power compensation controller 30 may further include: The first detection module 304 is used to detect the reactive power type corresponding to the reactive power currently existing in the power system; A first judgment module 305 is used to judge whether there is inductive reactive power in the power system and whether the power factor is lower than a first preset factor according to the reactive power type; The determination module 306 is used to determine that the power system meets the preset input control condition when the first determination module 305 determines that the power system has inductive reactive power and the power factor is lower than the first preset factor; The determination module 306 is further configured to determine that the power system does not meet a preset input control condition when the first determination module 305 determines that there is no inductive reactive power in the power system or the power factor is higher than or equal to a first preset factor; and / or, The first judgment module 305 is further used to judge whether there is capacitive reactive power in the power system and whether the power factor is higher than a second preset factor according to the reactive power type; wherein the second preset factor is higher than the first preset factor; The determination module 306 is further configured to determine that the power system meets a preset removal control condition when the first determination module 305 determines that there is capacitive reactive power in the power system and the power factor is higher than a second preset factor; The determination module 306 is further configured to determine that the power system does not meet a preset removal control condition when the first determination module 305 determines that there is no capacitive reactive power in the power system or the power factor is lower than or equal to a second preset factor.

[0098] It can be seen that the device described in the implementation of this optional embodiment can determine that the power system meets the input control conditions, that is, it determines that the capacitor needs to be put into operation when the reactive compensation controller determines that the power system has inductive reactive power and the power factor is lower than the first preset factor. It can also determine that the power system meets the removal control conditions, that is, it determines that the capacitor needs to be removed when the reactive compensation controller determines that the power system has capacitive reactive power and the power factor is higher than the second preset factor. This can improve the accuracy of the judgment of whether the power system meets the input control conditions or the removal control conditions, thereby helping to improve the reliability of the judgment result on whether the capacitor needs to be put into / cut off, and further help to improve the execution reliability of the input operation / removal operation, and further help to further improve the accuracy of the capacitor's switching control.

[0099] In this optional embodiment, optionally, the specific manner in which the calculation module 302 calculates the power data corresponding to the power system based on a preset power algorithm may include: Collecting sampling data corresponding to the power system; the sampling data includes the sampling quantity and the sampling instantaneous data corresponding to the sampling quantity; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current; Calculate voltage data and current data according to the sampled data; the voltage data includes real voltage and imaginary voltage; the current data includes real current and imaginary current; Calculate single-phase power data according to voltage data and current data; single-phase power data includes A-phase power data, B-phase power data and C-phase power data; Based on the single-phase power data, calculate the power data corresponding to the power system.

[0100] It can be seen that the device described in the implementation of this optional embodiment can also collect the sampling data corresponding to the power system, calculate the real data and imaginary data of the voltage and current, and thus calculate the single-phase power data based on the voltage data and current data, and then integrate all the single-phase power data to calculate the power data of the power system. This can improve the accuracy of the analysis of the sampled instantaneous data, thereby improving the calculation accuracy of the real and imaginary parts of the voltage and current data, and improving the calculation accuracy and efficiency of the target reactive power and power factor required by the power system, which is beneficial to improving the calculation accuracy of the capacity difference of each subsequent capacitor branch.

[0101] In another optional embodiment, the switching control module 303 performs a specific manner of performing a switching operation on at least one first target capacitor branch that satisfies the capacitor switching condition corresponding to the switching strategy in all capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch, which may include: Based on a preset sorting algorithm, according to the capacity difference corresponding to each capacitor branch, a difference sorting operation is performed on all capacitor branches to obtain a capacitor branch sequence; wherein the capacitor branch sequence sorts all capacitor branches in ascending order of capacity difference, and the capacitor branch sequence includes all capacitor branches and the sequence number corresponding to each capacitor branch; According to the determined switching strategy, target switching data required by the switching strategy is determined from all switching data; According to the switching strategy and the target switching data, a switching operation is sequentially performed on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy.

[0102] It can be seen that the device described in the implementation of this optional embodiment can sort the capacity difference of each capacitor branch in ascending order through the reactive compensation controller to obtain a capacitor branch sequence, and then determine the target switching data required for analysis of the switching strategy according to the switching strategy, and then sequentially put into the capacitor branch sequence the first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy. It can be achieved that the capacitor branches are first labeled by the capacity difference, and then the capacitor branches are sequentially put into use based on the switching order required by different switching strategies. While improving the labeling efficiency and labeling orderliness of the capacitor branches, the accuracy and flexibility of determining the order of capacitor branch input can be improved, which is beneficial to improving the accuracy of capacitor branch input control, and then it is beneficial to improve the accuracy of capacitor equalization.

[0103] In this optional embodiment, optionally, when the switching strategy is a frequency switching strategy, the target switching data includes all switching frequencies; when the switching strategy is a duration switching strategy, the target switching data includes all input durations; when the switching strategy is a comprehensive switching strategy, the target switching data includes all switching frequencies and all input durations; The specific manner in which the switching control module 303 sequentially performs the switching operation on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy according to the switching strategy and the target switching data may include: According to the switching strategy, the number of branches put into operation is determined, and the capacitor branch with the first order and corresponding number of branches put into operation is selected from the capacitor branch sequence as the first target capacitor branch; When the switching strategy is a frequency switching strategy or a duration switching strategy, determining a first switching order corresponding to each first target capacitor branch based on the ascending order of the target switching data, and performing a switching operation on each first target capacitor branch based on the first switching order; When the switching strategy is a comprehensive switching strategy, the second switching order corresponding to each first target capacitor branch is determined based on the ascending order of switching frequencies; alternatively, the comprehensive switching score corresponding to each first target capacitor branch is determined according to all switching frequencies and all switching durations, and the second switching order corresponding to each first target capacitor branch is determined based on the ascending order of the comprehensive switching scores; based on the second switching order, a switching operation is performed on each first target capacitor branch.

[0104] It can be seen that the device described in the implementation of this optional embodiment can also enable the reactive compensation controller to select the capacitor branch corresponding to the first-ranked and determined branch input number from the capacitor branch sequence as the first target capacitor branch, and when the switching strategy is a frequency switching strategy or a duration switching strategy, based on the ascending order of the target switching data, determine the first input order corresponding to each first target capacitor branch, and put each first target capacitor branch in turn, and can also determine the second input order corresponding to each first target capacitor branch based on the ascending order of the switching frequency when the switching strategy is a comprehensive switching strategy; or, determine the corresponding second input order according to the comprehensive switching score of each first target capacitor branch determined by all switching frequencies and all input durations, and then put each first target capacitor branch in turn based on the second input order, and can select different input order determination methods based on different switching strategies, which can further improve the flexibility and accuracy of determining the input order of the capacitor branch, thereby facilitating further improving the accuracy of the input control of the capacitor branch.

[0105] In this optional embodiment, optionally, the investment duration corresponding to each capacitor branch includes the historical accumulated investment duration corresponding to the capacitor branch; The switching control module 303 performs a specific method of performing a removal operation on at least one second target capacitor branch that meets the capacitor removal condition corresponding to the switching strategy in all first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch, including: Determine the number of branches to be removed based on the switching strategy; When the switching strategy is a frequency switching strategy or a duration switching strategy, a first removal order corresponding to each first target capacitor branch is determined based on the descending order of the target switching data, and a first target capacitor branch that is ranked first in the first removal order and corresponds to the number of branch removals is selected from all the first target capacitor branches as the second target capacitor branch, and then a removal operation is performed on each second target capacitor branch based on the first removal order; When the switching strategy is a comprehensive switching strategy, the second cutting order corresponding to each first target capacitor branch is determined based on the descending order of the switching frequency, and the first target capacitor branch that is ranked first in the second cutting order and corresponds to the number of branch cuttings is selected from all the first target capacitor branches as the second target capacitor branch, and then based on the second cutting order, the cutting operation is performed on each second target capacitor branch.

[0106] It can be seen that the device described in the implementation of this optional embodiment can also be used when the switching strategy is a frequency switching strategy or a duration switching strategy. The reactive compensation controller determines the first excision order of each first target capacitor branch based on the descending order of switching frequency / time, and screens and cuts off the second target capacitor branch in sequence, and then cuts off the second target capacitor branch in sequence. It can also be used when the switching strategy is a comprehensive switching strategy. Based on the descending order of switching frequency, determine the second excision order corresponding to each first target capacitor branch, and screen and cut off the second target capacitor branch in sequence, and then cut off each second target capacitor branch in sequence. Different excision order determination methods can be selected based on different switching strategies, which can further improve the flexibility and accuracy of determining the excision order of the capacitor branch, thereby facilitating further improving the excision control accuracy of the capacitor branch, improving the accuracy of the equalization control of the capacitor, and further facilitating extending the service life of the capacitor.

[0107] In this optional embodiment, optionally, the input duration corresponding to each capacitor branch also includes a single cumulative input duration of the capacitor branch in the current input operation; Among them, Figure 4 As shown, the reactive power compensation controller 30 may further include: The second judgment module 307 is used to judge, for each first target capacitor branch, whether the single cumulative input time of the first target capacitor branch in the current input operation is greater than or equal to a preset time threshold when the switching strategy is a comprehensive switching strategy; The switching control module 303 is further configured to, for each first target capacitor branch, determine the first target capacitor branch as a third target capacitor branch, and perform a forced removal operation on the third target capacitor branch when the second judgment module 307 judges that the single cumulative input time of the first target capacitor branch in the current input operation is greater than or equal to the preset time threshold; A second detection module 308 is used to detect whether there is a reactive power demand in the power system after the switching control module 303 performs a forced removal operation on any third target capacitor branch; The switching control module 303 is also used to select at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence according to the reactive power demand when it is detected that the power system has reactive power demand, and perform switching operation on each supplementary capacitor branch.

[0108] It can be seen that the device described in the implementation of this optional embodiment can also forcibly cut off the first target capacitor branch when the switching strategy is a comprehensive switching strategy. If the single cumulative input time of any first target capacitor branch of the reactive compensation controller exceeds the preset time threshold, the first target capacitor branch can be forcibly cut off. This can more effectively and accurately control the input time of the capacitor branch and avoid long-term operation of the capacitor branch, thereby further improving the switching control accuracy of the capacitor branch, which is beneficial to further improve the service life of the capacitor; and, if it is detected that there is still reactive power demand after forced switching, other capacitors can be additionally put into use, thereby further improving the accuracy of the equalization control of the capacitor branch while meeting the reactive power demand of the power system.

[0109] Embodiment 4 See also Figure 5 , Figure 5 is a structural schematic diagram of another switching control device based on reactive power compensation disclosed in an embodiment of the present invention. Figure 5 As shown, the switching control device based on reactive power compensation may include: A memory 401 storing executable program codes; a processor 402 coupled to the memory 401; The processor 402 calls the executable program code stored in the memory 401 to execute part or all of the steps in the switching control method based on reactive power compensation described in the first embodiment of the present invention or the second embodiment of the present invention.

[0110] Embodiment 5 An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute some or all of the steps in the switching control method based on reactive power compensation described in Embodiment 1 or Embodiment 2 of the present invention.

[0111] Embodiment 6 An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute part or all of the steps in the switching control method based on reactive power compensation described in Example 1 or Example 2.

[0112] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0113] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0114] Finally, it should be noted that the switching control method and device based on reactive power compensation disclosed in the embodiment of the present invention discloses only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A switching control method based on reactive power compensation, characterized in that: The method is applied to a reactive power compensation controller, and the reactive power compensation controller is used to control multiple capacitor branches. The method includes: The reactive power compensation controller obtains capacitance data corresponding to each of the capacitance branches and switching data corresponding to each of the capacitance branches; the switching data corresponding to each of the capacitance branches includes the switching frequency corresponding to the capacitance branch and the switching time corresponding to the capacitance branch; The reactive power compensation controller calculates power data corresponding to the power system based on a preset power algorithm; the power data includes a target reactive power required by the power system and a power factor corresponding to the power system; When the reactive power compensation controller detects that the power system meets the preset input control condition, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data corresponding to each capacitor branch and the power data; The reactive power compensation controller performs a switching operation on at least one first target capacitor branch that meets the capacitor switching condition corresponding to the switching strategy among all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching strategy is one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; When the reactive power compensation controller detects that the power system meets the preset cut-off control conditions, the reactive power compensation controller performs a cut-off operation on at least one second target capacitor branch that meets the capacitor cut-off conditions corresponding to the cut-off strategy among all the first target capacitor branches based on the cut-off strategy and according to the cut-off data corresponding to each capacitor branch.

2. The switching control method based on reactive power compensation according to claim 1, characterized in that: The method further comprises: The reactive power compensation controller detects the reactive power type corresponding to the reactive power currently existing in the power system; The specific method in which the reactive power compensation controller detects whether the power system meets the preset input control conditions includes: The reactive power compensation controller determines whether there is inductive reactive power in the power system and whether the power factor is lower than a first preset factor according to the reactive power type; When the reactive power compensation controller determines that the power system has the inductive reactive power and the power factor is lower than the first preset factor, the reactive power compensation controller determines that the power system meets the preset input control condition; When the reactive power compensation controller determines that the power system does not have the inductive reactive power or the power factor is higher than or equal to the first preset factor, the reactive power compensation controller determines that the power system does not meet the preset input control condition; Furthermore, the specific manner in which the reactive power compensation controller detects whether the power system meets the preset removal control condition includes: The reactive power compensation controller determines whether there is capacitive reactive power in the power system and whether the power factor is higher than a second preset factor according to the reactive power type; wherein the second preset factor is higher than the first preset factor; When the reactive power compensation controller determines that the capacitive reactive power exists in the power system and the power factor is higher than the second preset factor, the reactive power compensation controller determines that the power system meets the preset removal control condition; When the reactive power compensation controller determines that the capacitive reactive power does not exist in the power system or the power factor is lower than or equal to the second preset factor, the reactive power compensation controller determines that the power system does not meet the preset removal control condition.

3. The switching control method based on reactive power compensation according to claim 1, characterized in that: The reactive power compensation controller calculates power data corresponding to the power system based on a preset power algorithm, including: The reactive power compensation controller collects sampling data corresponding to the power system; the sampling data includes the sampling quantity and the sampling instantaneous data corresponding to the sampling quantity; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current; The reactive power compensation controller calculates voltage data and current data according to the sampled data; the voltage data includes a real voltage and an imaginary voltage; the current data includes a real current and an imaginary current; The reactive power compensation controller calculates single-phase power data according to the voltage data and the current data; the single-phase power data includes A-phase power data, B-phase power data and C-phase power data; The reactive power compensation controller calculates power data corresponding to the electric power system according to the single-phase power data.

4. The switching control method based on reactive power compensation according to any one of claims 1 to 3, characterized in that: The reactive power compensation controller performs a switching operation on at least one first target capacitor branch that meets the capacitor switching condition corresponding to the switching strategy among all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch, including: The reactive power compensation controller performs a difference sorting operation on all the capacitor branches based on a preset sorting algorithm according to the capacity difference corresponding to each capacitor branch, so as to obtain a capacitor branch sequence; wherein the capacitor branch sequence sorts all the capacitor branches in ascending order of the capacity difference, and the capacitor branch sequence includes all the capacitor branches and the sequence number corresponding to each capacitor branch; The reactive power compensation controller determines the target switching data required by the switching strategy from all the switching data according to the determined switching strategy; The reactive power compensation controller sequentially performs switching operations on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy according to the switching strategy and the target switching data.

5. The switching control method based on reactive power compensation according to claim 4 is characterized in that: When the switching strategy is the frequency switching strategy, the target switching data includes all the switching frequencies; when the switching strategy is the duration switching strategy, the target switching data includes all the input durations; when the switching strategy is the comprehensive switching strategy, the target switching data includes all the switching frequencies and all the input durations; The reactive power compensation controller sequentially performs a switching operation on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor switching condition corresponding to the switching strategy according to the switching strategy and the target switching data, including: The reactive power compensation controller determines the number of branches put into operation according to the switching strategy, and selects the capacitor branch with the first order and corresponding to the number of branches put into operation from the capacitor branch sequence as the first target capacitor branch; When the switching strategy is the frequency switching strategy or the duration switching strategy, the reactive power compensation controller determines a first input order corresponding to each of the first target capacitor branches based on the ascending order of the target switching data, and performs a input operation on each of the first target capacitor branches based on the first input order; When the switching strategy is the comprehensive switching strategy, the reactive compensation controller determines the second switching order corresponding to each of the first target capacitor branches based on the ascending order of the switching frequencies; or, the reactive compensation controller determines the comprehensive switching score corresponding to each of the first target capacitor branches according to all the switching frequencies and all the switching durations, and determines the second switching order corresponding to each of the first target capacitor branches based on the ascending order of the comprehensive switching scores; based on the second switching order, performs a switching operation on each of the first target capacitor branches.

6. The switching control method based on reactive power compensation according to claim 5, characterized in that: The input duration corresponding to each of the capacitor branches includes the historical accumulated input duration corresponding to the capacitor branch; The reactive power compensation controller performs a removal operation on at least one second target capacitor branch that meets the capacitor removal condition corresponding to the switching strategy in all the first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch, including: The reactive power compensation controller determines the number of branch cuts according to the switching strategy; When the switching strategy is the frequency switching strategy or the duration switching strategy, the reactive power compensation controller determines the first removal order corresponding to each of the first target capacitor branches based on the descending order of the target switching data, and selects the first target capacitor branch that is first sorted in the first removal order and corresponds to the number of branch removals from all the first target capacitor branches as the second target capacitor branch, and then performs a removal operation on each of the second target capacitor branches based on the first removal order; When the switching strategy is the comprehensive switching strategy, the reactive compensation controller determines the second cutting order corresponding to each of the first target capacitor branches based on the descending order of the switching frequency, and selects the first target capacitor branch that is ranked first in the second cutting order and corresponds to the number of branch cuttings from all the first target capacitor branches as the second target capacitor branch, and then performs a cutting operation on each of the second target capacitor branches based on the second cutting order.

7. The switching control method based on reactive power compensation according to claim 6, characterized in that: The input duration corresponding to each of the capacitor branches also includes a single cumulative input duration of the capacitor branch in the current input operation; Wherein, the method further comprises: When the switching strategy is the comprehensive switching strategy, for each of the first target capacitor branches, the reactive power compensation controller determines whether the single cumulative switching time of the first target capacitor branch in the current switching operation is greater than or equal to a preset time threshold; For each of the first target capacitor branches, when the reactive power compensation controller determines that the single cumulative input time of the first target capacitor branch in the current input operation is greater than or equal to the preset time threshold, the reactive power compensation controller determines the first target capacitor branch as a third target capacitor branch, and performs a forced removal operation on the third target capacitor branch; After the reactive power compensation controller performs the forced removal operation on any of the third target capacitor branches, the reactive power compensation controller detects whether there is reactive power demand in the power system; When the reactive power compensation controller detects that the power system has the reactive power demand, the reactive power compensation controller selects at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence according to the reactive power demand, and performs the input operation on each of the supplementary capacitor branches.

8. A switching control device based on reactive power compensation, characterized in that: The device includes a reactive power compensation controller, and the reactive power compensation controller is used to control multiple capacitor branches, and the reactive power compensation controller includes: An acquisition module, used to acquire capacitance data corresponding to each of the capacitance branches and switching data corresponding to each of the capacitance branches; the switching data corresponding to each of the capacitance branches includes the switching frequency corresponding to the capacitance branch and the input duration corresponding to the capacitance branch; A calculation module, used to calculate power data corresponding to the power system based on a preset power algorithm; the power data includes a target reactive power required by the power system and a power factor corresponding to the power system; The calculation module is further configured to calculate the capacity difference corresponding to each capacitor branch according to the capacitance data and the power data corresponding to each capacitor branch when the reactive power compensation controller detects that the power system meets the preset input control condition; A switching control module, configured to perform a switching operation on at least one first target capacitor branch that satisfies the capacitor switching condition corresponding to the switching strategy among all the capacitor branches based on the determined switching strategy and according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch; the switching strategy is one of a frequency switching strategy, a duration switching strategy and a comprehensive switching strategy; The switching control module is also used to perform a switching operation on at least one second target capacitor branch that meets the capacitor cutting condition corresponding to the switching strategy among all the first target capacitor branches based on the switching strategy and according to the switching data corresponding to each of the capacitor branches when the reactive compensation controller detects that the power system meets a preset switching control condition.

9. A switching control device based on reactive power compensation, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the switching control method based on reactive power compensation as described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the switching control method based on reactive power compensation as described in any one of claims 1-7.

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