A switching control method and device based on reactive power compensation

Abstract

The present invention relates to the technical field of reactive power compensation, and discloses a switching control method and device based on reactive power compensation. The method includes: acquiring 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 corresponding to each capacitor branch according to the capacitance data and power data of each capacitor branch; based on a switching strategy, inputting a first target capacitor branch that meets the capacitor input condition according to the capacity difference and the switching data; when it is detected that the power system meets the cut-off control condition, based on the switching strategy, cutting off a second target capacitor branch that meets the capacitor cut-off condition according to the switching data. It can be seen that implementing the present invention can improve the switching control flexibility and switching control accuracy of capacitors, realize the intelligent equal switching of capacitors, thereby improving the use safety and service life of capacitors.

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] Currently, in the power system, the existing switching strategies usually put multiple capacitor branches into operation according to a preset switching sequence. However, when implementing this switching strategy, it is easy to frequently put the capacitor branches with a higher ranking into operation, while the capacitor branches with a lower ranking are in a non-operating state for a long time. As a result, it is easy to cause the life attenuation rate of the capacitor branches with a higher ranking to be much faster than that of the capacitor branches with a lower ranking, and even easy to cause the capacitor branches with a higher ranking 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 accuracy of capacitors to achieve intelligent equal switching of capacitors, thereby improving the use safety of capacitors 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 accuracy of capacitors, facilitate the realization of intelligent equal switching of capacitors, thereby improving the use safety of capacitors and extending the service life of capacitors.

[0005] To solve the above technical problems, in a first aspect of the present invention, a switching control method based on reactive power compensation is disclosed. 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:

[0006] The reactive power compensation controller acquires 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 duration corresponding to the capacitor branch.

[0007] 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.

[0008] When the reactive power compensation controller detects that the power system meets a 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.

[0009] Based on the determined switching strategy, the reactive power compensation controller performs an input operation on at least one first target capacitor branch among all the capacitor branches that meet the capacitor input conditions corresponding to the 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.

[0010] 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 among all the first target capacitor branches that meet the capacitor cut-off conditions corresponding to the switching strategy based on the switching strategy and according to the switching data corresponding to each capacitor branch.

[0011] A second aspect of the present invention discloses a switching control device based on reactive power compensation. The device includes a reactive power compensation controller, and the reactive power compensation controller is used to control multiple capacitor branches. The reactive power compensation controller includes:

[0012] An acquisition module, configured to acquire the capacitor 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 duration corresponding to the capacitor branch.

[0013] A calculation module, configured 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.

[0014] The calculation module is further configured to calculate the capacity difference corresponding to each capacitor branch according to the capacitor data corresponding to each capacitor branch and the power data when the reactive power compensation controller detects that the power system meets the preset input control conditions.

[0015] A switching control module, configured to perform an input operation on at least one first target capacitor branch among all the capacitor branches that meet the capacitor input conditions corresponding to the switching strategy 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.

[0016] The switching control module is further configured to, when the reactive power compensation controller detects that the power system meets a preset cut-off control condition, perform 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 the first target capacitor branches according to the switching data corresponding to each capacitor branch based on the switching strategy.

[0017] As an alternative implementation, in the second aspect of the present invention, the reactive power compensation controller further includes:

[0018] A first detection module, configured to detect the type of reactive power corresponding to the reactive power currently existing in the power system;

[0019] A first judgment module, configured to judge whether the power system has inductive reactive power and whether the power factor is lower than a first preset factor according to the type of reactive power;

[0020] A determination module, configured to determine that the power system meets a preset input control condition when the first judgment module determines that the power system has the inductive reactive power and the power factor is lower than the first preset factor;

[0021] The determination module is further configured to determine that the power system does not meet a preset input control condition when the first judgment 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;

[0022] And / or,

[0023] The first judgment module is further configured to judge whether the power system has capacitive reactive power and whether the power factor is higher than a second preset factor according to the type of reactive power; wherein, the second preset factor is higher than the first preset factor;

[0024] The determination module is further configured to determine that the power system meets a preset cut-off control condition when the first judgment module determines that the power system has the capacitive reactive power and the power factor is higher than the second preset factor;

[0025] The determination module is further configured to determine that the power system does not meet a preset cut-off control condition when the first judgment module determines that the power system does not have the capacitive reactive power or the power factor is lower than or equal to the second preset factor.

[0026] As an alternative 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:

[0027] Collect the 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;

[0028] Calculate the voltage data and the current data according to the sampling data; the voltage data includes the real part voltage and the imaginary part voltage; the current data includes the real part current and the imaginary part current;

[0029] Calculate the single-phase power data according to the voltage data and the current data; the single-phase power data includes the phase A power data, the phase B power data and the phase C power data;

[0030] Calculate the power data corresponding to the power system according to the single-phase power data.

[0031] As an optional implementation manner, in the second aspect of the present invention, the specific manner in which the switching control module performs an input operation on at least one first target capacitor branch that satisfies the capacitor input condition corresponding to the switching strategy among all the 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 includes:

[0032] Based on a preset sorting algorithm, perform a difference sorting operation on all the capacitor branches according to the capacity difference corresponding to each capacitor branch 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 order serial number corresponding to each capacitor branch;

[0033] Determine the target switching data required by the switching strategy from all the switching data according to the determined switching strategy;

[0034] Perform an input operation on at least one first target capacitor branch that satisfies the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence in sequence according to the switching strategy and the target switching data.

[0035] As an optional implementation manner, 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;

[0036] Among them, the specific manner in which the switching control module sequentially performs an energizing operation on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor energizing condition corresponding to the switching strategy according to the switching strategy and the target switching data includes:

[0037] According to the switching strategy, determine the number of branches to be energized, and screen out the capacitor branch corresponding to the determined number of branches to be energized with the earliest sorting from the capacitor branch sequence as the first target capacitor branch;

[0038] When the switching strategy is the frequency switching strategy or the duration switching strategy, based on the ascending order of the target switching data, determine the first energizing order corresponding to each first target capacitor branch, and perform an energizing operation on each first target capacitor branch based on the first energizing order;

[0039] When the switching strategy is the comprehensive switching strategy, based on the ascending order of the switching frequency, determine the second energizing order corresponding to each first target capacitor branch; or, according to all the switching frequencies and all the energizing durations, determine the comprehensive switching score corresponding to each first target capacitor branch, and based on the ascending order of the comprehensive switching score, determine the second energizing order corresponding to each first target capacitor branch; perform an energizing operation on each first target capacitor branch based on the second energizing order.

[0040] As an optional implementation manner, in the second aspect of the present invention, the energizing duration corresponding to each capacitor branch includes the historical cumulative energizing duration corresponding to the capacitor branch;

[0041] Among them, the specific manner in which the switching control module performs a tripping operation on at least one second target capacitor branch in all the first target capacitor branches that meets the capacitor tripping condition corresponding to the switching strategy according to the switching strategy and the switching data corresponding to each capacitor branch includes:

[0042] According to the switching strategy, determine the number of branches to be tripped;

[0043] When the switching strategy is the frequency switching strategy or the duration switching strategy, based on the descending order of the target switching data, determine the first tripping order corresponding to each first target capacitor branch, and screen out the first target capacitor branch corresponding to the determined number of branches to be tripped with the earliest sorting in the first tripping order from all the first target capacitor branches as the second target capacitor branch, and then perform a tripping operation on each second target capacitor branch based on the first tripping order;

[0044] When the switching strategy is the comprehensive switching strategy, based on the descending order of the switching frequency, determine the second disconnection order corresponding to each first target capacitor branch, and screen out the first target capacitor branch corresponding to the earliest sorting in the second disconnection order and the number of branches to be disconnected from all the first target capacitor branches as the second target capacitor branch, and then perform the disconnection operation on each second target capacitor branch based on the second disconnection order.

[0045] As an optional implementation manner, in the second aspect of the present invention, the input duration corresponding to each capacitor branch further includes the single cumulative input duration of the capacitor branch in the current input operation;

[0046] Wherein, the reactive power compensation controller further includes:

[0047] A second judgment module, configured to, when the switching strategy is the comprehensive switching strategy, for each first target capacitor branch, judge whether the single cumulative input duration of the first target capacitor branch in the current input operation is greater than or equal to a preset duration threshold;

[0048] The switching control module is further configured to, for each first target capacitor branch, when the second judgment module judges that the single cumulative input duration of the first target capacitor branch in the current input operation is greater than or equal to the preset duration threshold, determine the first target capacitor branch as a third target capacitor branch, and perform a forced disconnection operation on the third target capacitor branch;

[0049] A second detection module, configured to detect whether there is a reactive power demand in the power system after the switching control module performs the forced disconnection operation on any third target capacitor branch;

[0050] The switching control module is further configured to, when it is detected that there is the reactive power demand in the power system, screen out at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence, and perform the input operation on each supplementary capacitor branch.

[0051] The third aspect of the present invention discloses another switching control device based on reactive power compensation, and the device includes:

[0052] A memory storing executable program code;

[0053] A processor coupled to the memory;

[0054] The processor calls the executable program code stored in the memory and executes 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.

[0055] The fourth aspect of the present invention discloses a computer storage medium storing computer instructions, which 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 when the computer instructions are called.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] In the present invention, a reactive power compensation controller acquires capacitance data corresponding to each capacitor branch and 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 duration corresponding to the capacitor branch; the reactive power compensation controller calculates 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 a preset input control condition, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the capacitance data and the power data corresponding to each capacitor branch; based on the determined switching strategy, the reactive power compensation controller performs an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy among all capacitor branches 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 a preset cut-off control condition, 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 the first target capacitor branches based on the switching strategy according to the switching data corresponding to each capacitor branch. It can be seen that when the power system is detected to meet the preset input control condition, the reactive power compensation controller can calculate the capacity difference corresponding to each capacitor branch according to the acquired capacitance 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 input duration corresponding to each capacitor branch, perform an input operation on the first target capacitor branch that meets the capacitor input condition. Moreover, when the power system is detected to meet the preset cut-off control condition, the reactive power compensation controller performs a cut-off operation on the second target capacitor branch that meets the capacitor cut-off condition based on the switching strategy and comprehensively considering the switching frequency and / or input duration corresponding to each capacitor branch. By flexibly selecting the switching strategy, the switching data of the capacitors can be flexibly and accurately analyzed, so that the switching requirements and switching sequence of the capacitor branches can be flexibly and accurately determined. Therefore, the flexibility and accuracy of the switching control of the capacitors can be improved, the intelligent equal switching of the capacitors can be realized, the service lives of all capacitors can tend to be average, which is conducive to extending the service life of the capacitors, and is also conducive to improving the use safety of the capacitors, and further conducive to improving the operation safety and operation stability of the power system. Description of the Drawings

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0059] Figure 1 It is a schematic flowchart of a switching control method based on reactive power compensation disclosed in an embodiment of the present invention;

[0060] Figure 2 It is a schematic flowchart of another switching control method based on reactive power compensation disclosed in an embodiment of the present invention;

[0061] Figure 3 It is a schematic structural diagram of a switching control device based on reactive power compensation disclosed in an embodiment of the present invention;

[0062] Figure 4 It is a schematic structural diagram of another switching control device based on reactive power compensation disclosed in an embodiment of the present invention;

[0063] Figure 5 It is a schematic structural diagram of yet another switching control device based on reactive power compensation disclosed in an embodiment of the present invention. Detailed implementation manners

[0064] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0065] The terms "first", "second", etc. in the specification and claims of the present invention and the above accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or terminal that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or terminals.

[0066] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0067] 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 input control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the obtained 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 input duration corresponding to each capacitor branch, performs an input operation on the first target capacitor branch that meets the capacitor input conditions. And when it is detected that the power system meets the preset cut-off control conditions, the reactive power compensation controller based on the switching strategy and comprehensively considering the switching frequency and / or input duration corresponding to each capacitor branch, performs a cut-off operation on the second target capacitor branch that meets the capacitor cut-off conditions. It 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 requirements and switching order of the capacitor branch. Therefore, it can improve the switching control flexibility and switching control accuracy of the capacitor, realize the intelligent equal switching of the capacitor, make the life of all capacitors tend to be average, which is beneficial to extending the service life of the capacitor, and is beneficial to improving the use safety of the capacitor, and further beneficial to improving the operation safety and operation stability of the power system. The following will be described in detail respectively.

[0068] Embodiment 1

[0069] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of a switching control method based on reactive power compensation disclosed in an embodiment of the present invention. Among them, 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. The switching control device can be one of an intelligent terminal, intelligent device, intelligent system, and server in the power system for controlling the switching of capacitor branches. Among them, the server can include a local server or a cloud server, which is not limited in the embodiments of the present invention; this 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 in the embodiments of the present invention; among them, 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 in the embodiments of the present invention. As Figure 1As shown, the switching control method based on reactive power compensation may include the following operations:

[0070] 101. The reactive power compensation controller obtains the capacitance data corresponding to each capacitor branch and the switching data corresponding to each capacitor branch.

[0071] In an embodiment of the present invention, each capacitor branch may include one capacitor. Optionally, each capacitor branch may also include multiple capacitors, which is not limited in the embodiment of the present invention; wherein, the capacitance data corresponding to each capacitor branch may include the reactive power capacity corresponding to the capacitor included 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 duration corresponding to the capacitor branch; wherein, optionally, the switching frequency corresponding to each capacitor branch may include the number of input times of the capacitor branch. Further optionally, it may also include the input frequency of the capacitor branch, which is not limited in the embodiment of the present invention; wherein, optionally, the input duration corresponding to each capacitor branch may include the historical cumulative input duration corresponding to the capacitor branch and / or the single cumulative input duration in the current input operation of the capacitor branch, which is not limited in the embodiment of the present invention.

[0072] 102. The reactive power compensation controller calculates the power data corresponding to the power system based on a preset power algorithm.

[0073] In an embodiment of the present invention, the power data may include the target reactive power required by the power system corresponding to the reactive power compensation controller and the power factor corresponding to the power system, wherein the power factor may be the power factor corresponding to the above target reactive power; wherein, optionally, the power algorithm may be any Fourier transform algorithm. Exemplarily, the power algorithm may be the FFT (Fast Fourier Transform) Fourier transform algorithm (i.e., the fast Fourier transform algorithm), which is not limited in the embodiment of the present invention.

[0074] 103. When the reactive power compensation controller detects that the power system meets a preset input control condition, 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.

[0075] In an embodiment of the present invention, the reactive power compensation controller may obtain the capacity difference corresponding to each capacitor branch by calculating the difference between the target reactive power required by the power system and the reactive power capacity corresponding to the capacitor included in each capacitor branch, which is not limited in the embodiment of the present invention.

[0076] 104. Based on the determined switching strategy, the reactive power compensation controller performs an input operation on at least one first target capacitor branch among all capacitor branches that meet the capacitor input conditions corresponding to the switching strategy according to the capacity difference corresponding to each capacitor branch and the switching data corresponding to each capacitor branch.

[0077] In an embodiment of the present invention, optionally, the switching strategy can be one of a frequency switching strategy, a duration switching strategy, and a comprehensive switching strategy; among them, the frequency switching strategy is a switching strategy that uses the switching frequency as the switching control basis, the duration switching strategy is a switching strategy that uses the input duration as the switching control basis, and the comprehensive switching strategy is a switching strategy that uses the switching frequency and the input duration as the switching control basis. Among them, the input operation is used to control the selected first target capacitor branch to be connected to the power system.

[0078] In an embodiment of the present invention, optionally, the switching strategy can be determined in the following manner:

[0079] Set the switching strategy by the management personnel corresponding to the power system; or,

[0080] Based on the obtained historical switching information corresponding to all capacitor branches, evaluate the life attenuation influence coefficient of each candidate switching strategy for all capacitor branches; among them, the historical switching information includes the historical switching strategy, the capacitor switching situation corresponding to the historical switching strategy, and the capacitor life change situation corresponding to the historical switching strategy; the candidate switching strategies include a frequency switching strategy, a duration switching strategy, and a comprehensive switching strategy;

[0081] Screen out the candidate switching strategy with the smallest life attenuation influence coefficient from all candidate switching strategies as the switching strategy; among them, the smaller the life attenuation influence coefficient is used to indicate that the use of this candidate switching strategy has the smallest influence on the life attenuation rate of the capacitor branch, and the embodiment of the present invention does not make a limit.

[0082] This can improve the determination flexibility and determination accuracy of the switching strategy, is beneficial to further improving the switching control accuracy of the capacitor, thereby further delaying the life attenuation rate of the capacitor, and further beneficial to extending the service life of the capacitor.

[0083] 105. When the reactive power compensation controller detects that the power system meets the preset disconnection control conditions, the reactive power compensation controller performs a disconnection operation on at least one second target capacitor branch among all first target capacitor branches that meet the capacitor disconnection conditions corresponding to the switching strategy based on the switching strategy according to the switching data corresponding to each capacitor branch.

[0084] In an embodiment of the present invention, the disconnection operation is used to control the selected second target capacitor branch to be disconnected from the power system.

[0085] It can be seen that when the method described in the embodiments of the present invention detects that the power system meets the pre-set input control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the obtained 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 input duration corresponding to each capacitor branch, performs an input operation on the first target capacitor branch that meets the capacitor input conditions. And when it is detected that the power system meets the pre-set cut-off control conditions, the reactive power compensation controller performs a cut-off operation on the second target capacitor branch that meets the capacitor cut-off conditions based on the switching strategy and comprehensively considering the switching frequency and / or input duration corresponding to each capacitor branch. It 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 requirements and switching order of the capacitor branch. Therefore, it can improve the switching control flexibility and switching control accuracy of the capacitor, realize the intelligent equal switching of the capacitor, make the life of all capacitors tend to be average, which is beneficial to extending the service life of the capacitor, and is beneficial to improving the use safety of the capacitor, and further beneficial to improving the operation safety and operation stability of the power system.

[0086] In an alternative embodiment, the method may further include the following operations:

[0087] The reactive power compensation controller detects the type of reactive power corresponding to the reactive power currently existing in the power system.

[0088] Optionally, the specific manner for the reactive power compensation controller to detect whether the power system meets the pre-set input control conditions may include:

[0089] The reactive power compensation controller determines whether there is inductive reactive power in the power system and whether the power factor is lower than the first preset factor according to the type of reactive power;

[0090] When the reactive power compensation controller determines that there is inductive reactive power in the power system and the power factor is lower than the first preset factor, the reactive power compensation controller determines that the power system meets the pre-set input control conditions;

[0091] 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 pre-set input control conditions.

[0092] Optionally, the specific manner for the reactive power compensation controller to detect whether the power system meets the pre-set cut-off control conditions may include:

[0093] 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 type of reactive power; wherein, the second preset factor is higher than the first preset factor.

[0094] When the reactive power compensation controller determines that there is capacitive reactive power 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 cut-off control condition.

[0095] 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 cut-off control condition.

[0096] Among them, by way of example, the first preset factor can be 0.9 or other preset values, which are not limited in the embodiments of the present invention.

[0097] Among them, by way of example, the second preset factor can be 0.95 or other preset values, which are not limited in the embodiments of the present invention.

[0098] Optionally, the reactive power compensation controller can detect the type of reactive power 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 situation, circuit impedance data), which is not limited in the embodiments of the present invention.

[0099] It can be seen that in this optional embodiment, when the reactive power compensation controller determines that there is inductive reactive power in the power system and the power factor is lower than the first preset factor, it can determine that the power system meets the input control condition, that is, it determines that capacitors need to be input. Also, when the reactive power compensation controller determines that there is capacitive reactive power in the power system and the power factor is higher than the second preset factor, it can determine that the power system meets the cut-off control condition, that is, it determines that capacitors need to be cut off. It can improve the judgment accuracy of whether the power system meets the input control condition or the cut-off control condition, thereby facilitating improving the reliability of the judgment result on whether capacitors need to be input / cut off, and further facilitating improving the execution reliability of the input operation / cut-off operation, and further facilitating improving the switching control accuracy of the capacitors.

[0100] In another optional embodiment, the reactive power compensation controller calculates the power data corresponding to the power system based on a preset power algorithm, which may include the following operations:

[0101] The reactive power compensation controller collects the sampling data corresponding to the power system; the sampling data includes the number of samples and the sampling instantaneous data corresponding to the number of samples; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current.

[0102] The reactive power compensation controller calculates voltage data and current data based on the sampled data; the voltage data includes real - part voltage and imaginary - part voltage; the current data includes real - part current and imaginary - part current;

[0103] The reactive power compensation controller calculates single - phase power data based on the voltage data and current data; the single - phase power data includes phase - A power data, phase - B power data, and phase - C power data;

[0104] The reactive power compensation controller calculates the power data corresponding to the power system based on the single - phase power data.

[0105] Specifically, the sampled instantaneous voltage may include the single - phase sampled instantaneous voltage corresponding to each single phase, and the sampled instantaneous current may include the single - phase sampled instantaneous current corresponding to each single phase.

[0106] Specifically, the real - part voltage may include the single - phase real - part voltage corresponding to each single phase, the imaginary - part voltage may include the single - phase imaginary - part voltage corresponding to each single phase, the real - part current may include the single - phase real - part current corresponding to each single phase, and the imaginary - part current may include the single - phase imaginary - part current corresponding to each single phase; where each single phase may be one of phase - A, phase - B, and phase - C.

[0107] Optionally, each single - phase power data (i.e., any one of phase - A power data, phase - B power data, and phase - C power data) may 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 may include three - phase active power, three - phase reactive power, three - phase apparent power, and three - phase power factor, where the three - phase reactive power may be used as the target reactive power, and the three - phase power factor may be used as the power factor.

[0108] Optionally, in the specific manner of calculating voltage data and current data by the reactive power compensation controller, for each single phase (i.e., one of phase - A, phase - B, and phase - C), the calculation methods of the single - phase real - part voltage, the single - phase imaginary - part voltage, the single - phase real - part current, and the single - phase imaginary - part current corresponding to this single phase may be specifically as follows:

[0109]

[0110]

[0111]

[0112]

[0113] Where, N is the number of samples, U iis the single-phase sampled instantaneous voltage, U re is the single-phase real part voltage, U im is the single-phase imaginary part voltage, I i is the single-phase sampled instantaneous current, I re is the single-phase real part current, I im is the single-phase imaginary part current.

[0114] And, taking the calculation of the power data of phase A as an example, the method by which the reactive power compensation controller calculates the single-phase power data based on the voltage data and current data can be as follows:

[0115]

[0116]

[0117]

[0118]

[0119] Among them, 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 part voltage of phase A, U ima is the imaginary part voltage of phase A, I rea is the real part current of phase A, I ima is the imaginary part current of phase A.

[0120] Optionally, the method by which the reactive power compensation controller calculates the corresponding power data of the power system based on the single-phase power data can be as follows:

[0121]

[0122]

[0123]

[0124]

[0125] Among them, P ais 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.

[0126] In this way, through the above calculation formulas, 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 improving the calculation efficiency and accuracy of power data, and further beneficial to improving the determination accuracy of input control conditions / cut-off control conditions and the calculation accuracy of the capacity difference of each subsequent capacitor branch.

[0127] It can be seen that the optional embodiment can collect the sampling data corresponding to the power system, calculate the real part data and imaginary part data of voltage and current, and thus calculate the single-phase power data based on the voltage data and current data, and then calculate the power data of the power system by integrating all single-phase power data. It can improve the analysis accuracy of sampling instantaneous data, thereby improving the calculation accuracy of the real part and imaginary part of voltage and current data, improving the calculation accuracy and efficiency of the target reactive power and power factor required by the power system, and further beneficial to improving the calculation accuracy of the capacity difference of each subsequent capacitor branch.

[0128] Embodiment 2

[0129] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of a switching control method based on reactive power compensation disclosed in an embodiment of the present invention. Among them, Figure 2The described switching control method based on reactive power compensation can be applied to a switching control device based on reactive power compensation. The switching control device can be one of an intelligent terminal, an intelligent device, an intelligent system, and a server in a power system for controlling the switching of capacitor branches. Among them, the server can include a local server or a cloud server, which is not limited in the embodiments of the present invention; this 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 in the embodiments of the present invention; among them, optionally, the reactive power compensation controller can be applied to a power system, and further optionally, the reactive power compensation controller can also be included in the switching control device, which is not limited in the embodiments of the present invention. As Figure 2 shown, the switching control method based on reactive power compensation can include the following operations:

[0130] 201. The reactive power compensation controller acquires the capacitance data corresponding to each capacitor branch and the switching data corresponding to each capacitor branch.

[0131] In the embodiments of the present invention, the switching data corresponding to each capacitor branch includes the switching frequency corresponding to the capacitor branch and the input duration corresponding to the capacitor branch.

[0132] 202. The reactive power compensation controller calculates the power data corresponding to the power system based on a preset power algorithm.

[0133] In the embodiments 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.

[0134] 203. 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 and the power data corresponding to each capacitor branch.

[0135] 204. The reactive power compensation controller performs a difference sorting operation on all capacitor branches according to the capacity difference corresponding to each capacitor branch based on a preset sorting algorithm to obtain a capacitor branch sequence.

[0136] In the embodiments of the present invention, the capacitor branch sequence sorts all capacitor branches in ascending order of the capacity difference, and the capacitor branch sequence includes all capacitor branches and the order number corresponding to each capacitor branch; among them, exemplarily, in the capacitor branch sequence, the capacitor branch with the earliest sorting (i.e., the capacitor branch with the smallest order number) corresponds to the smallest capacity difference, and the capacitor branch with the last sorting (i.e., the capacitor branch with the largest order number) corresponds to the largest capacity difference. Among them, optionally, the above sorting algorithm can be a bubble algorithm or other types of sorting algorithms, which is not limited in the embodiments of the present invention.

[0137] 205. 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.

[0138] In the embodiments of the present invention, the switching strategy can be one of a frequency switching strategy, a duration switching strategy, and a comprehensive switching strategy.

[0139] 206. The reactive power compensation controller sequentially performs an input operation on at least one first target capacitor branch in the capacitor branch sequence that satisfies the capacitor input condition corresponding to the switching strategy according to the switching strategy and the target switching data.

[0140] 207. When the reactive power compensation controller detects that the power system meets the preset cut-off control condition, the reactive power compensation controller performs a cut-off operation on at least one second target capacitor branch that satisfies the capacitor cut-off 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 capacitor branch.

[0141] In the embodiments of the present invention, for other detailed descriptions of steps 201 - 203 and step 207, please refer to the detailed descriptions of steps 101 - 103 and step 105 in Embodiment 1, and the embodiments of the present invention will not be elaborated herein.

[0142] It can be seen that when the method described in the embodiments of the present invention detects that the power system meets the pre-set input control conditions, the reactive power compensation controller calculates the capacity difference corresponding to each capacitor branch according to the obtained 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 input duration corresponding to each capacitor branch, performs an input operation on the first target capacitor branch that meets the capacitor input conditions. And when it is detected that the power system meets the pre-set cut-off control conditions, the reactive power compensation controller, based on the switching strategy and comprehensively considering the switching frequency and / or input duration corresponding to each capacitor branch, performs a cut-off operation on the second target capacitor branch that meets the capacitor cut-off conditions. It can flexibly select the switching strategy, flexibly and accurately analyze the switching data of the capacitors, so as to flexibly and accurately determine the switching requirements and switching order of the capacitor branches. Therefore, it can improve the switching control flexibility and switching control accuracy of the capacitors, realize the intelligent equal switching of the capacitors, make the service lives of all capacitors tend to be average, and further help to extend the service life of the capacitors and improve the use safety of the capacitors, and further help to improve the operation safety and operation stability of the power system. In addition, it can also sort the capacity differences of each capacitor branch in ascending order through the reactive power compensation controller to obtain a capacitor branch sequence, and then determine the target switching data required for the switching strategy according to the switching strategy, and then sequentially input the first target capacitor branch that meets the capacitor input conditions corresponding to the switching strategy in the capacitor branch sequence, which can realize numbering the capacitor branches by the capacity difference first, and then inputting the capacitor branches in sequence according to the switching order required by different switching strategies, which can improve the numbering efficiency and numbering orderliness of the capacitor branches while improving the determination accuracy and determination flexibility of the input order of the capacitor branches, thus helping to improve the input control accuracy of the capacitor branches and further helping to improve the equal switching accuracy of the capacitors.

[0143] In an alternative 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;

[0144] Among them, the reactive power compensation controller sequentially performs an input operation on at least one first target capacitor branch that meets the capacitor input conditions corresponding to the switching strategy in the capacitor branch sequence according to the switching strategy and the target switching data, which may include the following operations:

[0145] The reactive power compensation controller determines the number of branches to be input according to the switching strategy, and screens out the capacitor branch corresponding to the number of branches to be input with the earliest sorting from the capacitor branch sequence as the first target capacitor branch;

[0146] When the switching strategy is the frequency switching strategy or the duration switching strategy, the reactive power compensation controller determines the first switching order corresponding to each first target capacitor branch based on the ascending order of the target switching data, and performs the switching-in operation on each first target capacitor branch based on the first switching order;

[0147] When the switching strategy is the 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 the switching frequency; alternatively, the reactive power compensation controller determines the comprehensive switching score corresponding to each first target capacitor branch according to all the switching frequencies and all the switching durations, and determines the second switching order corresponding to each first target capacitor branch based on the ascending order of the comprehensive switching score; and performs the switching-in operation on each first target capacitor branch based on the second switching order.

[0148] Among them, by way of example, when it is determined that the number of branches to be switched in is 2, two capacitor branches with order numbers 1 and 2 are selected from the capacitor branch sequence as the first target capacitor branches, which is not limited in the embodiments of the present invention.

[0149] Among them, by way of example, when the switching strategy is the frequency 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 frequency, and sequentially switches in the first target capacitor branches, that is, first performs the switching-in operation on the first target capacitor branch with the least switching frequency, which is not limited in the embodiments of the present invention.

[0150] Among them, by way of example, when the switching strategy is the duration 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 duration (such as: historical cumulative switching duration), and sequentially switches in the first target capacitor branches, that is, first performs the switching-in operation on the first target capacitor branch with the shortest switching duration, which is not limited in the embodiments of the present invention.

[0151] Among them, by way of example, when the switching strategy is the comprehensive switching strategy, the reactive power compensation controller may determine the switching order corresponding to each first target capacitor branch based on the ascending order of the switching frequency, and sequentially switch in the first target capacitor branches, that is, first perform the switching-in operation on the first target capacitor branch with the least switching frequency; or may first perform the switching-in operation on the first target capacitor branch with the lowest comprehensive switching score based on the ascending order of the comprehensive switching score, which is not limited in the embodiments of the present invention. Among them, the lower the comprehensive switching score, the slower the life attenuation rate of the capacitor branch and / or the longer the remaining service life of the capacitor branch.

[0152] It can be seen that in this alternative embodiment, the reactive power compensation controller can screen out the capacitor branch corresponding to the earliest sorted and determined number of branches to be 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, based on the ascending order of the target switching data, the first input order corresponding to each first target capacitor branch is determined, and each first target capacitor branch is put into operation in sequence. When the switching strategy is the comprehensive switching strategy, based on the ascending order of the switching frequency, the second input order corresponding to each first target capacitor branch is determined; alternatively, according to the comprehensive switching score of each first target capacitor branch determined by all switching frequencies and all input durations, the corresponding second input order is determined, and then each first target capacitor branch is put into operation in sequence based on the second input order. Different input order determination methods can be selected based on different switching strategies, which can further improve the flexibility and accuracy of determining the input order of capacitor branches, thereby facilitating further improvement of the input control accuracy of capacitor branches.

[0153] In this alternative 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 input durations, which may include the following operations:

[0154] The reactive power compensation controller obtains the frequency calculation coefficient and the duration calculation coefficient;

[0155] For each first target capacitor branch, the reactive power compensation controller calculates the frequency score corresponding to the first target capacitor branch according to the switching frequency and the frequency calculation coefficient corresponding to the first target capacitor branch;

[0156] For each first target capacitor branch, the reactive power compensation controller calculates the 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;

[0157] For each first target capacitor branch, the reactive power compensation controller calculates the comprehensive switching score corresponding to the first target capacitor branch according to the above frequency score and the above duration score.

[0158] Optionally, the sum of the frequency score and the duration score can be calculated as the comprehensive switching score corresponding to each first target capacitor branch.

[0159] It can be seen that in this alternative embodiment, when the switching strategy is the comprehensive switching strategy, for each first target capacitor branch, the frequency score and the duration score can be calculated respectively, and then the comprehensive switching score of the first target capacitor branch can be obtained through comprehensive analysis, so as to improve the evaluation accuracy of the comprehensive switching score for each capacitor branch under the comprehensive switching strategy, thereby facilitating the improvement of the determination accuracy of the second input order, and further facilitating the improvement of the input control accuracy of capacitor branches.

[0160] In this optional embodiment, optionally, for each first target capacitor branch, the method may further include the following operations:

[0161] Detect 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 there is an abnormality / fault in the historical switching process of the first target capacitor branch;

[0162] When it is detected that there is abnormal switching information corresponding to the first target capacitor branch in the historical switching information, determine an abnormal score corresponding to the first target capacitor branch according to the above abnormal switching information; wherein, the higher the abnormal score, the higher the possibility that the first target capacitor branch currently has an abnormal situation.

[0163] Optionally, for each first target capacitor branch, calculating a comprehensive switching score corresponding to the first target capacitor branch according to the above frequency score and the above duration score may include the following operations:

[0164] When there is an abnormal score corresponding to the first target capacitor branch, calculate the sum of the frequency score, the duration score and the abnormal score as the comprehensive switching score corresponding to the first target capacitor branch.

[0165] It can be seen that in this optional embodiment, when the switching strategy is a comprehensive switching strategy, it is also possible to detect the abnormal switching information of the first target capacitor branch, evaluate the abnormal score of the first target capacitor branch, and thus comprehensively evaluate the comprehensive switching score of the first target capacitor branch based on the frequency score, the duration score and the abnormal score, which can improve the flexibility and comprehensiveness of the scoring for the capacitor branch through more diverse scoring dimensions, thereby facilitating further improving the evaluation accuracy of the comprehensive switching score, and further facilitating improving the determination accuracy of the second input order.

[0166] In this optional embodiment, optionally, the input duration corresponding to each capacitor branch includes the historical cumulative input duration corresponding to the capacitor branch;

[0167] Among them, the reactive power compensation controller performs a cut-off operation on at least one second target capacitor branch that satisfies the capacitor cut-off 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 capacitor branch, which may include the following operations:

[0168] The reactive power compensation controller determines the number of branches to be cut off according to the switching strategy;

[0169] When the switching strategy is the frequency switching strategy or the duration switching strategy, the reactive power compensation controller determines the first disconnection order corresponding to each first target capacitor branch based on the descending order of the target switching data, and screens out the first target capacitor branch corresponding to the largest number of branches to be disconnected and with the earliest order in the first disconnection order from all the first target capacitor branches as the second target capacitor branch, and then performs the disconnection operation on each second target capacitor branch based on the first disconnection order;

[0170] When the switching strategy is the comprehensive switching strategy, the reactive power compensation controller determines the second disconnection order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and screens out the first target capacitor branch corresponding to the largest number of branches to be disconnected and with the earliest order in the second disconnection order from all the first target capacitor branches as the second target capacitor branch, and then performs the disconnection operation on each second target capacitor branch based on the second disconnection order.

[0171] Exemplarily, taking the number of branches to be disconnected as 2 as an example, when the switching strategy is the frequency switching strategy, the reactive power compensation controller determines the disconnection order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and takes the first 2 first target capacitor branches as the second target capacitor branches and disconnects them in sequence, that is, first performs the disconnection operation on the second target capacitor branch with the highest switching frequency. The embodiments of the present invention are not limited thereto. Exemplarily, when the switching strategy is the duration switching strategy, the reactive power compensation controller determines the disconnection order corresponding to each first target capacitor branch based on the descending order of the input duration, and takes the first 2 first target capacitor branches as the second target capacitor branches and disconnects them in sequence, that is, first performs the disconnection operation on the second target capacitor branch with the longest input duration. The embodiments of the present invention are not limited thereto. Exemplarily, when the switching strategy is the comprehensive switching strategy, the reactive power compensation controller may determine the disconnection order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and take the first 2 first target capacitor branches as the second target capacitor branches and disconnect them in sequence, that is, first performs the disconnection operation on the second target capacitor branch with the highest switching frequency. The embodiments of the present invention are not limited thereto.

[0172] It can be seen that in this alternative embodiment, when the switching strategy is the frequency switching strategy or the duration switching strategy, the reactive power compensation controller respectively determines the first disconnection order of each first target capacitor branch based on the descending order of the switching frequency / input duration, and screens and disconnects the second target capacitor branches in sequence, and then disconnects the second target capacitor branches in sequence. When the switching strategy is the comprehensive switching strategy, it determines the second disconnection order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and screens and disconnects the second target capacitor branches in sequence, and then disconnects each second target capacitor branch in sequence. It can select different disconnection order determination methods based on different switching strategies, which can further improve the flexibility and accuracy of determining the disconnection order of the capacitor branches, thereby facilitating further improvement of the disconnection control accuracy of the capacitor branches, improving the average switching control accuracy of the capacitors, and further extending the service life of the capacitors.

[0173] In this alternative embodiment, optionally, the input duration corresponding to each capacitor branch further includes the single cumulative input duration of the capacitor branch in the current input operation;

[0174] Wherein, the method may further include the following operations:

[0175] When the switching strategy is the comprehensive switching strategy, for each first target capacitor branch, the reactive power compensation controller determines whether the single cumulative input duration of the first target capacitor branch in the current input operation is greater than or equal to a preset duration threshold;

[0176] For each first target capacitor branch, when the reactive power compensation controller determines that the single cumulative input duration of the first target capacitor branch in the current input operation is greater than or equal to the preset duration threshold, the reactive power compensation controller determines the first target capacitor branch as the third target capacitor branch and performs a forced disconnection operation on the third target capacitor branch;

[0177] After the reactive power compensation controller performs a forced disconnection operation on any third target capacitor branch, the reactive power compensation controller detects whether there is a reactive power demand in the power system;

[0178] When the reactive power compensation controller detects that there is a reactive power demand in the power system, the reactive power compensation controller screens at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence and performs an input operation on each supplementary capacitor branch.

[0179] Optionally, the above operations may be performed at any time after any first target capacitor branch is inserted; may also be performed at any time after it is detected that the power system meets a preset cut-off control condition; or may also be performed at any time after a cut-off operation is performed on a second target capacitor branch. The embodiments of the present invention do not make any limitations in this regard.

[0180] Optionally, the preset duration threshold may be a set value preset by a management staff, or may be an empirical value determined based on the capacitor switching situation corresponding to a historical switching strategy. The embodiments of the present invention do not make any limitations in this regard.

[0181] It can be seen that in this optional embodiment, when the switching strategy is a comprehensive switching strategy, if the single cumulative insertion duration of any first target capacitor branch by the reactive power compensation controller exceeds the preset duration threshold, the first target capacitor branch will be forcibly cut off, which can more effectively and accurately control the insertion duration of the capacitor branch, avoid the long-term operation of the capacitor branch, thereby further improving the switching control accuracy of the capacitor branch, and further facilitating the improvement of the service life of the capacitor; and, after forced switching, if it is detected that there is still a reactive power demand, other capacitors will be additionally inserted, so that while meeting the reactive power demand of the power system, the average insertion control accuracy of the capacitor branch can be further improved.

[0182] Embodiment III

[0183] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a switching control device based on reactive power compensation disclosed in the embodiments of the present invention. Among them, Figure 3 The described switching control device based on reactive power compensation may be applied to one of an intelligent terminal, an intelligent device, an intelligent system, and a server in a power system for controlling the switching of capacitor branches. Among them, the server may include a local server or a cloud server. The embodiments of the present invention do not make any limitations in this regard; further, the device may include a reactive power compensation controller. The embodiments of the present invention do not make any limitations in this regard. As Figure 3 shown, the device includes a reactive power compensation controller 30, and the reactive power compensation controller is used to control a plurality of capacitor branches. The reactive power compensation controller 30 may include:

[0184] An acquisition module 301, configured to acquire capacitor data corresponding to each capacitor branch and 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 insertion duration corresponding to the capacitor branch;

[0185] A calculation module 302, configured to calculate 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;

[0186] The calculation module 302 is further configured to calculate the capacity difference corresponding to each capacitor branch according to the capacitor 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.

[0187] The switching control module 303 is configured to perform an input operation on at least one first target capacitor branch that meets the capacitor input 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.

[0188] The switching control module 303 is further configured to perform 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 the first target capacitor branches based on the switching strategy according to the switching data corresponding to each capacitor branch when the reactive power compensation controller detects that the power system meets the preset cut-off control condition.

[0189] It can be seen that when the device described in the embodiment of the present invention is implemented and it is detected 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 obtained 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 input duration corresponding to each capacitor branch, performs an 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 cut-off control condition, the reactive power compensation controller performs a cut-off operation on the second target capacitor branch that meets the capacitor cut-off condition based on the switching strategy and comprehensively considering the switching frequency and / or input duration corresponding to each capacitor branch. It 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 requirements and switching order of the capacitor branch. Therefore, it can improve the switching control flexibility and switching control accuracy of the capacitor, realize the intelligent equal switching of the capacitor, make the life of all capacitors tend to be average, and further is beneficial to extending the service life of the capacitor, and is beneficial to improving the use safety of the capacitor, and further is beneficial to improving the operation safety and operation stability of the power system.

[0190] In an alternative embodiment, as Figure 4 shown, the reactive power compensation controller 30 may further include:

[0191] The first detection module 304 is configured to detect the type of reactive power corresponding to the reactive power currently existing in the power system.

[0192] The first judgment module 305 is configured to determine 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 type of reactive power;

[0193] The determination module 306 is configured to determine that the power system meets the preset input control condition when the first judgment module 305 determines that there is inductive reactive power in the power system and the power factor is lower than the first preset factor;

[0194] The determination module 306 is further configured to determine that the power system does not meet the preset input control condition when the first judgment module 305 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;

[0195] and / or

[0196] The first judgment module 305 is further configured to determine 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 type of reactive power; wherein, the second preset factor is higher than the first preset factor;

[0197] The determination module 306 is further configured to determine that the power system meets the preset cut-off control condition when the first judgment module 305 determines that there is capacitive reactive power in the power system and the power factor is higher than the second preset factor;

[0198] The determination module 306 is further configured to determine that the power system does not meet the preset cut-off control condition when the first judgment module 305 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.

[0199] It can be seen that the device described in this alternative embodiment can determine that the power system meets the input control condition when the reactive power compensation controller determines that there is inductive reactive power in the power system and the power factor is lower than the first preset factor, that is, it determines that capacitors need to be put into operation. It can also determine that the power system meets the cut-off control condition when the reactive power compensation controller determines that there is capacitive reactive power in the power system and the power factor is higher than the second preset factor, that is, it determines that capacitors need to be cut off. It can improve the accuracy of judging whether the power system meets the input control condition or the cut-off control condition, which is conducive to improving the reliability of the judgment result on whether capacitors need to be put into operation / cut off, and further conducive to improving the execution reliability of the input operation / cut-off operation, and further conducive to improving the switching control accuracy of the capacitors.

[0200] In this alternative 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:

[0201] Collect the sampling data corresponding to the power system; the sampling data includes the number of samples and the sampling instantaneous data corresponding to the number of samples; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current;

[0202] According to the sampling data, calculate the voltage data and the current data; the voltage data includes the real part voltage and the imaginary part voltage; the current data includes the real part current and the imaginary part current;

[0203] According to the voltage data and the current data, calculate the single-phase power data; the single-phase power data includes the phase A power data, the phase B power data, and the phase C power data;

[0204] According to the single-phase power data, calculate the power data corresponding to the power system.

[0205] It can be seen that the device described in implementing this optional embodiment can also collect the sampling data corresponding to the power system, calculate the real part data and the imaginary part data of the voltage and the current, thereby calculate the single-phase power data based on the voltage data and the current data, and then comprehensively calculate the power data of the power system based on all the single-phase power data, which can improve the analysis accuracy of the sampling instantaneous data, thereby improve the calculation accuracy of the real part and the imaginary part of the voltage and current data, improve the calculation accuracy and calculation efficiency of the target reactive power and the power factor required by the power system, and further facilitate improving the calculation accuracy of the capacity difference of each subsequent capacitor branch.

[0206] In another optional embodiment, the specific manner in which the switching control module 303 performs an input operation on at least one first target capacitor branch that satisfies the capacitor input 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 may include:

[0207] Based on a pre-set sorting algorithm, perform a difference sorting operation on all capacitor branches according to the capacity difference corresponding to each capacitor branch to obtain a capacitor branch sequence; wherein, the capacitor branch sequence sorts all capacitor branches in ascending order of the capacity difference, and the capacitor branch sequence includes all capacitor branches and the sequence number corresponding to each capacitor branch;

[0208] According to the determined switching strategy, determine the target switching data required by the switching strategy from all the switching data;

[0209] According to the switching strategy and the target switching data, sequentially perform an input operation on at least one first target capacitor branch that satisfies the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence.

[0210] It can be seen that the device described in the optional embodiment can sort the capacity differences of each capacitor branch in ascending order through a reactive power compensation controller to obtain a capacitor branch sequence, and then determine the target switching data to be analyzed for the switching strategy according to the switching strategy. Then, the first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence is sequentially input. It can first label the capacitor branches according to the capacity difference, and then input the capacitor branches in sequence according to the switching order required by different switching strategies, which can improve the labeling efficiency and labeling orderliness of the capacitor branches while improving the determination accuracy and determination flexibility of the input order of the capacitor branches, thus facilitating the improvement of the input control accuracy of the capacitor branches and further facilitating the improvement of the average input accuracy of the capacitors.

[0211] 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;

[0212] Among them, the specific manner in which the switching control module 303 sequentially performs input operations on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence according to the switching strategy and the target switching data may include:

[0213] According to the switching strategy, determine the number of branches to be input, and screen out the capacitor branch corresponding to the number of branches to be input with the earliest sorting from the capacitor branch sequence as the first target capacitor branch;

[0214] When the switching strategy is a frequency switching strategy or a duration switching strategy, determine the first input order corresponding to each first target capacitor branch based on the ascending order of the target switching data, and perform input operations on each first target capacitor branch based on the first input order;

[0215] When the switching strategy is a comprehensive switching strategy, determine the second input order corresponding to each first target capacitor branch based on the ascending order of the switching frequency; or, determine the comprehensive switching score corresponding to each first target capacitor branch according to all switching frequencies and all input durations, and determine the second input order corresponding to each first target capacitor branch based on the ascending order of the comprehensive switching score; perform input operations on each first target capacitor branch based on the second input order.

[0216] It can be seen that the device described in implementing this optional embodiment can also screen out the capacitor branch corresponding to the earliest sorted and determined branch input quantity from the capacitor branch sequence as the first target capacitor branch by the reactive power compensation controller. When the switching strategy is the frequency switching strategy or the 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 input each first target capacitor branch in turn. When the switching strategy is the comprehensive switching strategy, based on the ascending order of the switching frequency, determine the second input order corresponding to each first target capacitor branch; 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 input each first target capacitor branch in turn based on the second input order. It 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 capacitor branches, thus facilitating further improving the input control accuracy of capacitor branches.

[0217] In this optional embodiment, optionally, the input duration corresponding to each capacitor branch includes the historical cumulative input duration corresponding to this capacitor branch;

[0218] Among them, the specific manner in which the switching control module 303 performs a cutting 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 includes:

[0219] Determine the branch cutting quantity according to the switching strategy;

[0220] When the switching strategy is the frequency switching strategy or the duration switching strategy, based on the descending order of the target switching data, determine the first cutting order corresponding to each first target capacitor branch, and screen out the first target capacitor branch corresponding to the earliest sorted and branch cutting quantity in the first cutting order from all first target capacitor branches as the second target capacitor branch, and then perform a cutting operation on each second target capacitor branch based on the first cutting order;

[0221] When the switching strategy is the comprehensive switching strategy, based on the descending order of the switching frequency, determine the second cutting order corresponding to each first target capacitor branch, and screen out the first target capacitor branch corresponding to the earliest sorted and branch cutting quantity in the second cutting order from all first target capacitor branches as the second target capacitor branch, and then perform a cutting operation on each second target capacitor branch based on the second cutting order.

[0222] It can be seen that when the switching strategy is the frequency switching strategy or the duration switching strategy, the device described in this optional embodiment can also enable the reactive power compensation controller to determine the first disconnection order of each first target capacitor branch based on the descending order of the switching frequency / input duration, respectively, and screen and disconnect the second target capacitor branches in sequence, and then disconnect the second target capacitor branches in sequence. When the switching strategy is the comprehensive switching strategy, it can also determine the second disconnection order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and screen and disconnect the second target capacitor branches in sequence, and then disconnect each second target capacitor branch in sequence. It can select different disconnection order determination methods based on different switching strategies, which can further improve the flexibility and accuracy of determining the disconnection order of the capacitor branches, thereby facilitating further improvement of the disconnection control accuracy of the capacitor branches, improving the average input control accuracy of the capacitors, and further extending the service life of the capacitors.

[0223] In this optional embodiment, optionally, the input duration corresponding to each capacitor branch further includes the single cumulative input duration of the capacitor branch in the current input operation;

[0224] Among them, as Figure 4 shown, the reactive power compensation controller 30 may further include:

[0225] A second judgment module 307, configured to, when the switching strategy is the comprehensive switching strategy, for each first target capacitor branch, judge whether the single cumulative input duration of the first target capacitor branch in the current input operation is greater than or equal to a preset duration threshold;

[0226] The switching control module 303 is further configured to, for each first target capacitor branch, when the second judgment module 307 judges that the single cumulative input duration of the first target capacitor branch in the current input operation is greater than or equal to the preset duration threshold, determine the first target capacitor branch as a third target capacitor branch, and perform a forced disconnection operation on the third target capacitor branch;

[0227] A second detection module 308, configured to detect whether there is a reactive power demand in the power system after the switching control module 303 performs a forced disconnection operation on any third target capacitor branch;

[0228] The switching control module 303 is further configured to, when it is detected that there is a reactive power demand in the power system, screen at least one supplementary capacitor branch that meets the reactive power demand from the capacitor branch sequence, and perform an input operation on each supplementary capacitor branch.

[0229] It can be seen that when the switching strategy is the comprehensive switching strategy, if the single - time cumulative input duration of any first target capacitor branch of the reactive power compensation controller exceeds the preset duration threshold, the device described in the optional embodiment can forcibly cut off the first target capacitor branch, which can more effectively and accurately control the input duration of the capacitor branch, avoid the long - term operation of the capacitor branch, thereby further improving the switching control accuracy of the capacitor branch, and further facilitating the improvement of the service life of the capacitor; and, after forced switching, if it is detected that there is still a reactive power demand, other capacitors can be additionally input, so that while meeting the reactive power demand of the power system, the average input control accuracy of the capacitor branch can be further improved.

[0230] Embodiment 4

[0231] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of another switching control device based on reactive power compensation disclosed in the embodiments of the present invention. As Figure 5 shown, the switching control device based on reactive power compensation may include:

[0232] A memory 401 storing executable program code;

[0233] A processor 402 coupled to the memory 401;

[0234] The processor 402 calls the executable program code stored in the memory 401 and executes 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.

[0235] Embodiment 5

[0236] The embodiments of the present invention disclose a computer storage medium. The computer storage medium stores computer instructions, and 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.

[0237] Embodiment 6

[0238] The embodiments of the present invention disclose a computer program product. The computer program product includes a non - transitory computer - readable storage medium storing a computer program, and the computer program is operable to cause a computer 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.

[0239] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separated. The components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0240] Through the specific descriptions of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium. The storage medium includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc memories, magnetic disk memories, tape memories, or any other computer-readable medium that can be used to carry or store data.

[0241] Finally, it should be noted that the disclosure of a switching control method and device based on reactive power compensation according to the embodiments of the present invention only discloses the preferred embodiments of the present invention, and is only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the 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 a plurality of capacitor branches. The method includes: The reactive power compensation controller acquires 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 duration 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 a 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; Based on the determined switching strategy, the reactive power compensation controller performs an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy among all the capacitor branches 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 a preset cut-off control condition, 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 the first target capacitor branches based on the switching strategy and according to the switching data corresponding to each capacitor branch; Among them, the reactive power compensation controller performs an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy among all the 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, including: The reactive power compensation controller performs a difference sorting operation on all the capacitor branches according to the capacity difference corresponding to each capacitor branch based on a preset sorting algorithm, and obtains 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; 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 an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence according to the switching strategy and the target switching data; Among them, the reactive power compensation controller sequentially performs connection operations on at least one first target capacitor branch in the capacitor branch sequence that meets the capacitor connection conditions corresponding to the switching strategy according to the switching strategy and the target switching data, including: When the switching strategy is the comprehensive switching strategy, the reactive power compensation controller determines the comprehensive switching score corresponding to each first target capacitor branch according to all the switching frequencies and all the connection durations, and determines the second connection order corresponding to each first target capacitor branch based on the ascending order of the comprehensive switching scores; based on the second connection order, connection operations are performed on each first target capacitor branch.

2. The switching control method based on reactive power compensation according to claim 1, wherein The method further includes: The reactive power compensation controller detects the type of reactive power corresponding to the reactive power currently existing in the power system; Among them, the specific manner in which the reactive power compensation controller detects whether the power system meets the preset connection 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 type of reactive power; When the reactive power compensation controller determines that there is inductive reactive power in the power system and the power factor is lower than the first preset factor, the reactive power compensation controller determines that the power system meets the preset connection control conditions; 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 connection control conditions; And, the specific manner in which the reactive power compensation controller detects whether the power system meets the preset disconnection control conditions 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 type of reactive power; where the second preset factor is higher than the first preset factor; When the reactive power compensation controller determines that there is capacitive reactive power 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 disconnection control conditions; 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 disconnection control conditions.

3. The switching control method based on reactive power compensation according to claim 1, wherein The reactive power compensation controller calculates the power data corresponding to the power system based on a preset power algorithm, including: The reactive power compensation controller collects the sampling data corresponding to the power system; the sampling data includes the number of samples and the sampling instantaneous data corresponding to the number of samples; the sampling instantaneous data includes the sampling instantaneous voltage and the sampling instantaneous current; The reactive power compensation controller calculates the voltage data and the current data according to the sampling data; the voltage data includes the real part voltage and the imaginary part voltage; the current data includes the real part current and the imaginary part 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.

4. The switching control method based on reactive power compensation according to any one of claims 1-3, 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; Among them, the reactive power compensation controller sequentially performs input operations on at least one first target capacitor branch in the capacitor branch sequence that satisfies the capacitor input conditions corresponding to the switching strategy according to the switching strategy and the target switching data, and further includes: The reactive power compensation controller determines the number of branches to be input according to the switching strategy, and screens out the capacitor branches corresponding to the number of branches to be input with the earliest sorting from the capacitor branch sequence as the first target capacitor branches; When the switching strategy is the frequency switching strategy or the duration switching strategy, the reactive power compensation controller determines the first input order corresponding to each first target capacitor branch based on the ascending order of the target switching data, and performs input operations on each first target capacitor branch based on the first input order.

5. The switching control method based on reactive power compensation according to claim 4, wherein The input duration corresponding to each capacitor branch includes the historical cumulative input duration corresponding to the capacitor branch; Among them, the reactive power compensation controller performs cut-off operations on at least one second target capacitor branch in all the first target capacitor branches that satisfies the capacitor cut-off conditions corresponding to the switching strategy based on the switching strategy according to the switching data corresponding to each capacitor branch, including: The reactive power compensation controller determines the number of branches to be cut off 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 cut-off order corresponding to each first target capacitor branch based on the descending order of the target switching data, and screens out the first target capacitor branch corresponding to the number of branches to be cut off with the earliest sorting in the first cut-off order from all the first target capacitor branches as the second target capacitor branch, and then performs cut-off operations on each second target capacitor branch based on the first cut-off order; When the switching strategy is the comprehensive switching strategy, the reactive power compensation controller determines the second cut-off order corresponding to each first target capacitor branch based on the descending order of the switching frequency, and screens out the first target capacitor branch corresponding to the number of branches to be cut off with the earliest sorting in the second cut-off order from all the first target capacitor branches as the second target capacitor branch, and then performs cut-off operations on each second target capacitor branch based on the second cut-off order.

6. The switching control method based on reactive power compensation according to claim 5, characterized in that The input duration corresponding to each capacitor branch further includes the single cumulative input duration of the capacitor branch in the current input operation; Among them, the method further includes: 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 - in duration of the first target capacitor branch in the current switching - in operation is greater than or equal to a preset duration threshold; For each of the first target capacitor branches, when the reactive power compensation controller determines that the single - cumulative switching - in duration of the first target capacitor branch in the current switching - in operation is greater than or equal to the preset duration threshold, the reactive power compensation controller determines the first target capacitor branch as a third target capacitor branch and performs a forced disconnection operation on the third target capacitor branch; After the reactive power compensation controller performs the forced disconnection operation on any of the third target capacitor branches, the reactive power compensation controller detects whether there is a reactive power demand in the power system; When the reactive power compensation controller detects that there is the reactive power demand in the power system, the reactive power compensation controller screens out 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 switching - in operation on each of the supplementary capacitor branches.

7. 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. The reactive power compensation controller includes: An acquisition module, configured to acquire the capacitor 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 switching - in duration corresponding to the capacitor branch; A calculation module, configured 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 is further configured to, when the reactive power compensation controller detects that the power system meets a preset switching - in control condition, calculate the capacity difference corresponding to each capacitor branch according to the capacitor data corresponding to each capacitor branch and the power data; A switching control module, configured to perform a switching - in operation on at least one first target capacitor branch that meets the capacitor - switching - in condition corresponding to the switching strategy among all the 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 - based switching strategy, a duration - based switching strategy, and a comprehensive switching strategy; The switching control module is further configured to, when the reactive power compensation controller detects that the power system meets a preset switching - out control condition, perform a switching - out operation on at least one second target capacitor branch that meets the capacitor - switching - out condition corresponding to the switching strategy among all the first target capacitor branches based on the switching strategy according to the switching data corresponding to each capacitor branch. Among them, the specific manner in which the switching control module performs an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy 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, includes: Based on a preset sorting algorithm, perform a difference sorting operation on all capacitor branches according to the capacity difference corresponding to each capacitor branch to obtain a capacitor branch sequence; wherein, the capacitor branch sequence sorts all capacitor branches in ascending order of the capacity difference, and the capacitor branch sequence includes all capacitor branches and the order number corresponding to each capacitor branch; Determine the target switching data required by the switching strategy from all the switching data according to the determined switching strategy; when the switching strategy is the comprehensive switching strategy, the target switching data includes all the switching frequencies and all the input durations; According to the switching strategy and the target switching data, sequentially perform an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence; Among them, the specific manner in which the switching control module sequentially performs an input operation on at least one first target capacitor branch that meets the capacitor input condition corresponding to the switching strategy in the capacitor branch sequence according to the switching strategy and the target switching data, includes: When the switching strategy is the comprehensive switching strategy, determine the comprehensive switching score corresponding to each first target capacitor branch according to all the switching frequencies and all the input durations, and determine the second input order corresponding to each first target capacitor branch based on the ascending order of the comprehensive switching scores; based on the second input order, perform an input operation on each first target capacitor branch.

8. A switching control device based on reactive power compensation, characterized in that, The device includes: A memory storing executable program code; A processor coupled to the memory; The processor calls the executable program code stored in the memory and executes the switching control method based on reactive power compensation according to any one of claims 1-6.

9. A computer storage medium, characterized in that, The computer storage medium stores computer instructions, which are used to execute the switching control method based on reactive power compensation according to any one of claims 1-6 when the computer instructions are called.

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