A transformer capacitor adaptive control method and control device

Abstract

This invention discloses an adaptive control method and device for transformer substation capacitors. The adaptive control device includes a current transformer, a sampling module, a main control module, and an operation module. The current transformer senses the voltage and current of the low-voltage busbar of the transformer. The sampling module is electrically connected to the current transformer and generates voltage and current data. The main control module is electrically connected to the sampling module and calculates and compares the voltage and current data to set the capacitor control mode in the transformer substation. The operation module is electrically connected to the main control module and controls the switching of multiple capacitors in the capacitor bank within the transformer substation based on the capacitor control mode derived by the main control module. This invention allows each transformer substation to define different judgment criteria based on its location, calculate its own data locally, immediately obtain its optimal control mode, and immediately execute the switching of capacitors.

Description

Technical Field

[0001] This invention belongs to the technical field of distribution network transformer area equipment control, specifically relating to an adaptive control method and control device for transformer area capacitors. Background Technology

[0002] In new power systems, the increasing number of distributed power sources and new loads connected to the grid has transformed the distribution network from a one-way transmission system to a two-way transmission system. Voltage and power factor, influenced by these distributed power sources and new loads, are no longer exhibiting the low-frequency, small-amplitude fluctuations of the traditional model, but are gradually shifting to high-frequency, large-amplitude fluctuations. This makes the traditional method of fixed current and voltage compensation using capacitors inadequate for adapting to the changing grid structure. Therefore, it is necessary to adjust the number and structure of capacitors under different operating conditions. A distribution area can be understood as the power supply range of a transformer, typically including the low-voltage output of the transformer, the low-voltage busbar, various loads connected to the low-voltage busbar, and multiple capacitors used for capacitor compensation on the low-voltage side. These capacitors are usually integrated into a capacitor bank, with each capacitor assigned a relay to connect or disconnect the low-voltage busbar. Distribution areas are categorized into three types: commercial, industrial, and residential. These three types of distribution areas have different requirements for capacitor switching.

[0003] In existing technologies, the distribution area remotely controls the input and output of capacitors through a data center. Currently, there are multiple remote communication methods between the distribution area's capacitor bank and the data center. After remote communication, the data center calculates the appropriate capacitor combination and then remotely issues action commands to switch capacitors to ensure the operation of the distribution area.

[0004] However, with the surge in the number of power devices, if the traditional model is still adopted, where the data center is responsible for calculations and issuing instructions, and the power devices are responsible for execution, significant delays will inevitably occur due to the time required for data processing and the latency of remote communication. This makes it difficult to promptly change the capacitor switching status. Furthermore, if multiple distribution areas share a single data center, the capacitor switching of all distribution areas will also go out of control when the data center fails. On the other hand, existing technologies not only struggle to obtain sufficiently detailed data for a specific distribution area, but also make it difficult to adaptively optimize for changes in the power consumption patterns of that area. Summary of the Invention

[0005] In order to overcome one or more defects and deficiencies in the existing technology, the first objective of the present invention is to provide a transformer area capacitor adaptive control device, and the second objective is to provide a transformer area capacitor adaptive control method, which is used to obtain different configuration modes of the transformer area by defining different judgment criteria based on the transformer area positioning.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] An adaptive control device for transformer substation capacitors includes a current transformer, a sampling module, a main control module, a data storage module, and an operation module.

[0008] The instrument transformer is installed on the output busbar of the transformer in the distribution area on the low-voltage side, and is used to sense the voltage and current of the transformer's low-voltage busbar within a set time period.

[0009] The sampling module is electrically connected to the current transformer. The sampling module is used to sample the voltage and current sensed by the current transformer to form voltage data and current data.

[0010] The main control module is electrically connected to the sampling module and is used to calculate and compare voltage and current data. Then, based on the calculation and comparison results of the voltage and current data, the capacitor control mode in the transformer area is set.

[0011] The operation module is electrically connected to the main control module. The operation module is used to control the switching of multiple capacitors in the capacitor cabinet in the control area according to the capacitor control mode obtained by the main control module.

[0012] The data storage module is electrically connected to the main control module. The data storage module is used to store voltage and current data within a set time period.

[0013] The sampling module, main control module, data storage module, and operation module are all located near the capacitor bank in the distribution area.

[0014] Preferably, it also includes a human-computer interaction module;

[0015] The human-machine interaction module is electrically connected to the main control module. The human-machine interaction module serves as the display and operation interface between maintenance personnel and the main control module.

[0016] Preferably, the transformer is a voltage transformer and a current transformer;

[0017] The voltage transformer and current transformer are electrically connected to the sampling module.

[0018] Preferably, based on the calculation and comparison results of voltage and current data, the capacitor control mode in the transformer substation is set, including:

[0019] Based on the power consumption type of the transformer area, set the corresponding allowable voltage range and / or allowable range of average voltage and / or threshold of average load rate and / or allowable range of average power factor; the power consumption type of the transformer area includes commercial transformer area, industrial transformer area, and residential transformer area.

[0020] Based on voltage and current data, calculate the voltage and / or average voltage and / or average load rate and / or average power factor of the three-phase line of the transformer low-voltage bus. Then compare the voltage and / or average voltage and / or average load rate and / or average power factor of the three-phase line with the set voltage allowable range and / or average voltage allowable range and / or average load rate threshold and / or average power factor allowable range. Then set the capacitor control mode according to the comparison result.

[0021] Capacitor control mode is used to generate instructions for the operation module to operate multiple capacitor switching combinations.

[0022] Furthermore, the data storage module is also used to store load rate and power factor data.

[0023] An adaptive control method for transformer substation capacitors, comprising the adaptive control device for transformer substation capacitors as described above, includes the following steps:

[0024] The voltage and current of the low-voltage busbar in the transformer substation are collected at several set time points using an instrument transformer. The sampling module then generates voltage and current data corresponding to the set time points and transmits the voltage and current data to the data storage module. At the same time, the power consumption type of the transformer substation is set in the main control module. The total duration formed by the set time points is recorded as the set duration.

[0025] Within the main control module, based on voltage and current data at several set time points, the power factor, load rate, and voltage corresponding to each time point are calculated, and the power factor, load rate, and voltage at all time points are respectively formed into a power factor array, a load rate array, and a voltage array.

[0026] Within the main control module, the average power factor of the power factor array, the average load rate of the load rate array, and the average voltage of the voltage array are calculated respectively within a set time period. Then, the set voltage allowable range and / or the voltage average allowable range and / or the load rate average threshold and / or the power factor average allowable range are compared with the voltage, voltage average, load rate average, and power factor average. Based on the comparison results, the capacitor control mode is determined.

[0027] Based on the capacitor control mode and the power consumption type of the transformer area, the main control module sends corresponding instructions to the transformer area capacitor cabinet. The capacitor cabinet then performs corresponding capacitor switching actions according to the instructions, forming the corresponding combination of capacitors connected to the low-voltage bus.

[0028] Preferably, the duration is set to the period of the past 72 hours for the transformer area, starting from the current time.

[0029] Several time points are set as 15-minute intervals within a set duration.

[0030] Preferably, the capacitor control modes include voltage priority mode and reactive power priority mode;

[0031] In voltage priority mode, when the voltage and / or average voltage of any phase in the three-phase line of the low-voltage bus of the transformer substation is outside the set voltage allowable range and / or average voltage allowable range of the corresponding transformer substation power consumption type, the voltage is adjusted to the set voltage operating range of the corresponding transformer substation power consumption type by adjusting the switching of multiple capacitors.

[0032] The reactive power priority mode is as follows: in the three-phase line of the low-voltage bus of the transformer area, when the average power factor of any phase is outside the allowable range of the set average power factor of the corresponding transformer area power consumption type, the power factor is adjusted to the set power factor operating range of the corresponding transformer area power consumption type by adjusting the switching of multiple capacitors.

[0033] Furthermore, in the three-phase line of the low-voltage busbar in the distribution area, each phase line is equipped with its own power factor array, load rate array, and voltage array;

[0034] The load factor array consists of the load factors at the points in time when the power factor is lower than a set power factor threshold.

[0035] Furthermore, when the average voltage of one phase of the low-voltage bus is outside the allowable range of the average voltage, it is in voltage priority mode.

[0036] When the voltage array of one phase line in the low-voltage bus has eight consecutive time points where the voltage is outside the set voltage allowable range, it is in voltage priority mode.

[0037] If the average power factor of one phase of the low-voltage bus is outside the allowable range of the average power factor, and the average load rate of this phase is greater than the average load rate threshold, then it is in reactive power priority mode; otherwise, it is in voltage priority mode.

[0038] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0039] This invention is applicable to transformer substations with a certain degree of autonomous decision-making capability. Without the need for a data center, it enables local autonomous switching of capacitors within the substation, avoiding the delays associated with remote communication with a data center, the excessive time consumption of large data center computing tasks, and the inability to guarantee automatic switching of local substation capacitors in the event of a data center failure. This invention is also suitable for substations equipped with distributed power sources or new types of loads, ensuring the normal operation of various devices connected to the substation. By combining different capacitor control modes with the substation's power consumption type, it meets the substation's need for rapid local capacitor response control, achieving the effect of adjusting voltage and reactive power fluctuations. Attached Figure Description

[0040] Figure 1 This is a system structure block diagram of an adaptive control device for transformer area capacitors according to the present invention;

[0041] Figure 2 This is a flowchart illustrating an adaptive control method for transformer area capacitors according to the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0043] Example 1

[0044] like Figure 1 As shown, an adaptive control device for transformer area capacitors in this embodiment includes a main control module, a sampling module, an operation module, a data storage module, a voltage transformer, a current transformer, and a human-machine interaction module.

[0045] The adaptive control device for transformer substation capacitors in this embodiment preferably controls the substations connected to a transformer via a 10kV high-voltage busbar. The high-voltage side of the transformer is connected to a 10kV high-voltage busbar, and the low-voltage side is connected to a 380V low-voltage busbar. Various loads and capacitor banks are connected to the 380V low-voltage busbar. Each capacitor bank contains N capacitors, from capacitor 1 to capacitor N, and each capacitor is controlled, allowing for various combinations of connections to the 380V low-voltage busbar. In this embodiment, the connection or disconnection of the capacitors is preferably achieved by controlling relays connected in series with the capacitors.

[0046] Voltage transformers and current transformers are installed at the input end of the 380V low-voltage busbar of the transformer. Each of the three phase lines on the 380V low-voltage busbar is connected to a voltage transformer and a current transformer, respectively. The voltage transformers and current transformers are used to transform the voltage and current of each phase line, thereby obtaining the corresponding voltage and current signals. Each voltage transformer and each current transformer is electrically connected to the sampling module, transmitting the voltage and current signals to the sampling module.

[0047] The sampling module is used to sample voltage and current signals to form voltage and current data according to a set duration and several set time points. In this embodiment, the set duration is preferably 72 hours from the current time point in the transformer area, and the set time points are 15 minutes apart within the 72 hours, that is, several set time points are included within the set duration.

[0048] The main control module is electrically connected to the sampling module, operation module, data storage module, and human-machine interaction module. As the core of the entire device's data processing and control, the main control module receives voltage and current data from the sampling module. Based on this data, it calculates the voltage of each phase of the 380V low-voltage bus at all set time points, as well as the average voltage, average power factor, and average load rate over a set period. It then compares these values ​​with the set allowable voltage range, allowable range for the average voltage, the threshold for the average load rate, and the allowable range for the average power factor, respectively. Taking into account whether the power consumption type of the transformer area is commercial, industrial, or residential, it sets the capacitor control mode for the on / off switching of multiple capacitors in the capacitor bank.

[0049] Capacitor control modes include voltage priority mode and reactive power priority mode;

[0050] In voltage priority mode, when the voltage or average voltage of any phase in the three-phase line of the low-voltage bus of the transformer substation is outside the set voltage allowable range or average voltage allowable range of the corresponding transformer substation power consumption type, the voltage is adjusted to the set voltage operating range of the corresponding transformer substation power consumption type by adjusting the switching of multiple capacitors.

[0051] The reactive power priority mode is as follows: in the three-phase line of the low-voltage bus of the transformer area, when the average power factor of any phase is outside the allowable range of the set average power factor of the corresponding transformer area power consumption type, the power factor is adjusted to the set power factor operating range of the corresponding transformer area power consumption type by adjusting the switching of multiple capacitors.

[0052] When the average voltage of one phase line in the low-voltage bus is outside the allowable range of the average voltage, it is in voltage priority mode; when the voltage array of one phase line in the low-voltage bus has eight consecutive time points where the voltage is outside the allowable range of the average voltage, it is in voltage priority mode; when the average power factor of one phase line in the low-voltage bus is outside the allowable range of the average power factor, and the average load rate of this phase line is greater than the average load rate threshold, it is in reactive power priority mode; otherwise, it is in voltage priority mode.

[0053] The operation module is used to generate control commands based on the capacitor control mode of the main control module, and transmit the control commands to the capacitor cabinet to realize the on / off control of each capacitor.

[0054] The data storage module is used to store voltage data, current data, and the average voltage, average power factor, and average load rate calculated by the main control module, and is controlled to perform read and write operations with the main control module.

[0055] The human-computer interaction module serves as the display and operation interface between maintenance personnel and the main control module, enabling manual operation of reading or writing data.

[0056] Compared with the prior art, the adaptive control device for transformer area capacitors in this embodiment has the following advantages:

[0057] This embodiment is applicable to transformer substations with a certain degree of autonomous decision-making requirements. Without the need for a data center, it enables the local substation to autonomously switch capacitors, avoiding the problems of delays in remote communication with the data center, excessive computing tasks in the data center, and the inability to guarantee automatic switching of local transformer substation capacitors due to data center failures.

[0058] Example 2

[0059] like Figure 2 As shown in the figure, an adaptive control method for transformer area capacitors in this embodiment includes the following steps:

[0060] S1. Using voltage transformers and current transformers, the voltage and current of the three-phase lines (phase A, phase B, and phase C) of the 380V low-voltage bus in the transformer substation are collected at several set time points within a set time period. The sampling module then generates voltage and current data corresponding to the several set time points and transmits the voltage and current data to the data storage module. At the same time, the power consumption type of the transformer substation is set in the main control module.

[0061] The total duration formed by several set time points is recorded as the set duration; in this embodiment, the set duration is preferably the time period of the past 72 hours from the current time point of the station area, and several set time points are each 15 minutes within the set duration as a time point;

[0062] S2. Within the main control module, based on voltage and current data at several set time points, calculate the power factor of each of the three phases in the 380V low-voltage bus at each time point. Load factor (η) A η B η C ), voltage (U) A U B U C The power factor, load factor, and voltage at all time points are then used to create separate power factor arrays. Load factor array (Dlη) A 、Dlη B 、Dlη C Voltage array (DU) A DU B DU C Meanwhile, the main control module sets the allowable voltage range, the allowable average voltage range, the average load rate threshold, and the allowable average power factor range; the main control module also sets the voltage operating range and power factor operating range corresponding to different power consumption types of different distribution areas.

[0063] In this embodiment, the preferred power consumption types of the transformer substations are divided into commercial transformer substations, industrial transformer substations, and residential transformer substations. The specific power consumption type of the transformer substation is determined by the composition of its load.

[0064] In this embodiment, the preferred voltage operating range for commercial transformer substations is [210V, 233V], and the preferred power factor operating range is [0.85, 1]. The preferred voltage operating range for industrial transformer substations is [205V, 235V], and the preferred power factor operating range is [0.8, 1]. The preferred voltage operating range for residential transformer substations is [215V, 230V], and the preferred power factor operating range is [0.9, 1].

[0065] The power factor allowable range is used to filter the set time point corresponding to the low power factor of each phase in the three-phase line of the 380V low-voltage bus.

[0066] In the three-phase lines of the 380V low-voltage busbar in the transformer substation, each phase line is equipped with its own power factor array, load rate array, and voltage array. In this embodiment, the load rate array is further preferably composed of the load rate corresponding to the time point when the power factor is lower than a set power factor threshold; wherein, the set power factor threshold is the lower limit of the allowable range of the average power factor, and in this embodiment, the set power factor threshold is preferably 0.8.

[0067] In this embodiment, the preferred allowable range for the average voltage is [198V, 235V], the allowable range for the average power factor is [0.8, 1], and the threshold for the average load rate is 35%. The allowable voltage range is set according to the voltage operating range set for different types of power consumption areas. The numerical range of the voltage operating range is included in the numerical range of the allowable voltage range, and the error between the allowable voltage range and the upper and lower limits of the voltage operating range is controlled at a low level.

[0068] S3. Within the main control module, calculate the average power factor of the power factor array within the set time period. The average load factor of the load factor array (lη) Aavr lη Bavr lη Cavr ), the average voltage of the voltage array (U) Aavr U Bavr U Cavr );

[0069] S4. Compare the set power factor average allowable range, load rate average threshold, voltage average allowable range, and voltage allowable range with the power factor average, load rate average, voltage average, and voltage values ​​respectively.

[0070] If the average voltage of a certain phase in a 380V low-voltage bus (U) Aavr and / or U Bavr and / or U Cavr If the voltage is outside the allowable range of average voltage [198V, 235V], then the capacitor control mode of step S5 is executed;

[0071] If a certain phase voltage array (DU) in a 380V low-voltage bus is A and / or DU B and / or DU C If the voltage at eight consecutive set time points is outside the voltage allowable range for the corresponding power consumption type of the transformer area, then the capacitor control mode in step S5 will be executed.

[0072] If the average power factor of a certain phase in a 380V low-voltage bus is ( and / or and / or The average power factor is outside the allowable range [0.8, 1], and the average load factor of this phase (lη) is outside the allowable range [0.8, 1]. Aavr and / or lη Bavr and / or lη Cavr If the load rate is greater than the average threshold of 35%, then proceed to step S6; otherwise, proceed to step S5.

[0073] S5. The main control module sets the capacitor control mode to voltage priority mode, and adjusts the voltage by setting multiple capacitors in the capacitor bank of the 380V low-voltage busbar to be on / off according to the power consumption type of the transformer area. The set multiple capacitor on / off combinations are used to adjust the voltage of the 380V low-voltage busbar, thereby stabilizing the voltage within the voltage operating range of commercial transformer area [210V, 233V], or industrial transformer area [205V, 235V], or residential transformer area [215V, 230V]. Then, step S7 is executed.

[0074] S6. The main control module sets the capacitor control mode to reactive power priority mode, and adjusts the power by setting multiple capacitors in the capacitor bank of the 380V low-voltage bus to be on / off according to the power consumption type of the transformer area. The set multiple capacitor on / off combinations are used to adjust the power of the 380V low-voltage bus, thereby stabilizing the power factor in the power factor operating range of commercial transformer area [0.85,1], or industrial transformer area [0.8,1], or residential transformer area [0.9,1].

[0075] S7. Based on the on / off combination of multiple capacitors set in step S5 or step S6, the main control module controls the operation module to send the corresponding capacitor switching command to the capacitor cabinet in the transformer area. The capacitor cabinet performs the corresponding capacitor switching action according to the capacitor switching command, so that the corresponding capacitor is connected to or disconnected from the 380V low-voltage bus, forming the corresponding combination of capacitors connected to the 380V low-voltage bus, thereby realizing the adjustment of the voltage or power factor of the transformer area.

[0076] Compared with the prior art, the adaptive control method for transformer area capacitors in this embodiment has the following advantages:

[0077] This embodiment is applicable to transformer substations equipped with distributed power sources or new types of loads. It can ensure the normal operation of various devices connected to this substation. By combining different capacitor control modes with the power consumption type of the substation, it meets the needs of the substation for local capacitor fast response control and achieves the effect of adjusting voltage and reactive power fluctuations.

[0078] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An adaptive control method for transformer area capacitors, characterized in that, It is equipped with an adaptive control device for transformer area capacitors, including a current transformer, a sampling module, a main control module, a data storage module, and an operation module; The current transformer is installed on the output bus of the transformer in the distribution area on the low-voltage side, and is used to sense the voltage and current of the transformer's low-voltage bus within a set time period. The sampling module is electrically connected to the current transformer. The sampling module is used to sample the voltage and current sensed by the current transformer to form voltage data and current data. The main control module is electrically connected to the sampling module and is used to calculate and compare the voltage and current data. Then, based on the calculation and comparison results of the voltage and current data, the capacitor control mode in the transformer area is set. The operation module is electrically connected to the main control module. The operation module is used to control the switching of multiple capacitors in the capacitor cabinet in the control area according to the capacitor control mode obtained by the main control module. The data storage module is electrically connected to the main control module, and the data storage module is used to store voltage data and current data within a set time period; The sampling module, main control module, data storage module, and operation module are all located near the capacitor bank in the distribution area; The steps include the following: The voltage and current of the low-voltage busbar in the transformer substation are collected at several set time points using a current transformer. The sampling module then generates voltage and current data corresponding to the set time points and transmits the voltage and current data to the data storage module. At the same time, the power consumption type of the transformer substation is set in the main control module. The total duration formed by the set time points is recorded as the set duration. Within the main control module, based on voltage and current data at several set time points, the power factor, load rate, and voltage corresponding to each time point are calculated, and the power factor, load rate, and voltage at all time points are respectively formed into a power factor array, a load rate array, and a voltage array. Within the main control module, the average power factor of the power factor array, the average load rate of the load rate array, and the average voltage of the voltage array are calculated within a set time period. Then, the set voltage allowable range and / or the voltage average allowable range and / or the load rate average threshold and / or the power factor average allowable range are compared with the voltage, voltage average, load rate average, and power factor average. Based on the comparison results, the capacitor control mode is determined. Based on the capacitor control mode and the power consumption type of the transformer area, the main control module controls the operation module to send corresponding instructions to the transformer area capacitor cabinet. The capacitor cabinet then performs corresponding capacitor switching actions according to the instructions, forming the corresponding combination of capacitors connected to the low-voltage bus. Capacitor control modes include voltage priority mode and reactive power priority mode; The voltage priority mode is as follows: in the three-phase line of the low-voltage bus of the transformer area, when the voltage and / or the average voltage of any phase is outside the set voltage allowable range and / or the average voltage allowable range of the corresponding transformer area power consumption type, the voltage is adjusted to the set voltage operating range of the corresponding transformer area power consumption type by adjusting the switching of multiple capacitors. The reactive power priority mode is as follows: in the three-phase line of the low-voltage bus of the transformer substation, when the average power factor of any phase is outside the allowable range of the set average power factor for the corresponding transformer substation power consumption type, the power factor is adjusted to the set power factor operating range for the corresponding transformer substation power consumption type by adjusting the switching of multiple capacitors.

2. The adaptive control method for transformer area capacitors according to claim 1, characterized in that, The set duration is the time period within the past 72 hours from the current time in the station area; Several time points are set as 15-minute intervals within a set duration.

3. The adaptive control method for transformer area capacitors according to claim 1, characterized in that, In the three-phase line of the low-voltage busbar in the transformer area, each phase line is equipped with its own power factor array, load rate array, and voltage array; The load factor array consists of the load factors at the points in time when the power factor is lower than a set power factor threshold.

4. The adaptive control method for transformer area capacitors according to claim 3, characterized in that, When the average voltage of one phase of a line in the low-voltage bus is outside the allowable range of average voltage, it is in voltage priority mode. When the voltage array of one phase line in the low-voltage bus has eight consecutive time points where the voltage is outside the set voltage allowable range, it is in voltage priority mode. If the average power factor of one phase of the low-voltage bus is outside the allowable range of the average power factor, and the average load rate of this phase is greater than the average load rate threshold, then it is in reactive power priority mode; otherwise, it is in voltage priority mode.

5. The adaptive control method for transformer area capacitors according to claim 1, characterized in that, The adaptive control device for transformer area capacitors also includes a human-machine interaction module; The human-computer interaction module is electrically connected to the main control module, and serves as the display and operation interface between maintenance personnel and the main control module.

6. The adaptive control method for transformer area capacitors according to claim 1, characterized in that, Instrument transformers include voltage transformers and current transformers; The voltage transformer and current transformer are electrically connected to the sampling module.

7. The adaptive control method for transformer area capacitors according to claim 1, characterized in that, Based on the calculation and comparison results of voltage and current data, the capacitor control mode in the transformer substation is set, including: Based on the power consumption type of the transformer area, set corresponding allowable voltage ranges and / or allowable ranges for average voltage and / or thresholds for average load rate and / or allowable ranges for average power factor; the power consumption type of the transformer area includes commercial transformer areas, industrial transformer areas, and residential transformer areas. Based on voltage and current data, calculate the voltage and / or average voltage and / or average load rate and / or average power factor of the three-phase line of the transformer low-voltage bus. Then, compare the voltage and / or average voltage and / or average load rate and / or average power factor of the three-phase line with the set voltage allowable range and / or average voltage allowable range and / or average load rate threshold and / or average power factor allowable range. Then, set the capacitor control mode according to the comparison result. The capacitor control mode is used to generate instructions for the operation module to operate multiple capacitor switching combinations.

8. The adaptive control method for transformer area capacitors according to claim 1, characterized in that, The data storage module is also used to store load rate and power factor data.

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