A reactive power compensation remote monitoring method based on intelligent fusion terminal of transformer area

Abstract

The present application belongs to the field of power equipment, and particularly relates to a reactive power compensation remote monitoring method and system based on a transformer area intelligent fusion terminal; the remote monitoring method is used for realizing remote monitoring and control of the operation state of a reactive power compensation system; and comprises the following processes: 1, system deployment stage: the transformer area intelligent fusion terminal is connected with a reactive power compensation device and a reactive power compensation controller thereof through an RS485 bus interface, and is connected with a data center through power carrier communication or Ethernet; 2, remote measurement and remote signaling stage of reactive power compensation information: the transformer area intelligent fusion terminal reads the operation state information of each device and uploads the same to the data center; 3, remote control and remote adjustment stage of the reactive power compensation state: the data center generates adjustment instructions according to preset target parameters and real-time operation parameters of each reactive power compensation device; and adjustment of the reactive power compensation state of the transformer area is completed. The present application solves the problems of low automation degree, insufficient safety and intelligence level of the traditional reactive power compensation state monitoring method.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of power equipment, and particularly relates to a reactive power compensation remote monitoring method and system based on a transformer area intelligent fusion terminal. BACKGROUND

[0002] Reactive power compensation, full name reactive power compensation, in the power supply system, usually through the reactive power compensation device to improve the power factor of the power grid, reduce the loss of power transformer and transmission line; and to improve the power supply efficiency, improve the power supply environment. Reactive power compensation device is an indispensable device in the power supply system. Reasonable selection of compensation device can maximize the reduction of power grid loss and improve the quality of power grid. On the contrary, if not properly selected or used, it may cause power supply system, voltage fluctuation, harmonic increase and other problems. The power supply system usually needs to monitor the reactive power of the system, and dig the reactive power compensation of the system at the right time. Most of this work needs to be monitored and processed manually; if the management personnel cannot respond in time, it will bring hidden dangers to the stable operation of the power grid, which affects the safety and intelligent level of the power grid. SUMMARY

[0003] In order to solve the problems of low automation degree of reactive power compensation state monitoring method in the existing power supply system, and insufficient safety and intelligent level of power supply system, the application provides a reactive power compensation remote monitoring method and system based on a transformer area intelligent fusion terminal.

[0004] The application adopts the following technical scheme:

[0005] A reactive power compensation remote monitoring method based on a transformer area intelligent fusion terminal, which is used to realize remote monitoring and control of the running state of the reactive power compensation system. The remote monitoring method includes the following processes:

[0006] I. System deployment stage:

[0007] The transformer area intelligent fusion terminal is connected with the reactive power compensation device and its reactive power compensation controller through RS485 bus interface communication. The transformer area intelligent fusion terminal is connected with a central server of a remote data center through power carrier communication or Ethernet. The initialization configuration of the interactive state of the transformer area intelligent fusion terminal and the data center is completed.

[0008] II. Telemetering and telemetering stage of reactive power compensation information:

[0009] The intelligent fusion terminal of the transformer area reads the operation state information of the reactive compensation device after reaching the preset meter reading period, and then obtains the remote measurement data related to the reactive compensation system. The intelligent fusion terminal of the transformer area also reads the state information of the reactive compensation controller, and then obtains the remote signaling data related to the reactive compensation system. The intelligent fusion terminal of the transformer area also uploads the remote measurement data and the remote signaling data to the data center.

[0010] III. Remote control and remote adjustment stage of the reactive compensation state

[0011] The data center calculates the real-time operation parameters of the equipment according to the operation state information of each reactive compensation device and its reactive compensation controller in the transformer area. The transformer area power grid administrator queries the real-time operation parameters of the reactive compensation device in the transformer area through the data center, and issues adjustment instructions to the reactive compensation device according to the difference between the preset target parameters and the real-time operation parameters of each reactive compensation device in the transformer area. The adjustment instructions are transmitted to the reactive compensation controller by the reactive compensation detection APP, and the reactive compensation controller executes the adjustment instructions to complete the remote control and adjustment of the reactive compensation state of the transformer area.

[0012] As a further improvement of the present application, in the initialization configuration process of the interactive state of the intelligent fusion terminal of the transformer area and the data center, the intelligent fusion terminal of the transformer area needs to read the model information in the configuration file and complete the registration in the data center, and complete the initialization of the log file. The data center initializes the intelligent fusion terminal of the transformer area, stores the equipment archives of the intelligent fusion terminal of the transformer area and all the corresponding equipment, and waits to receive the data uploaded by the intelligent fusion terminal of the transformer area. The equipment archives are used to realize data verification in the interactive stage.

[0013] As a further improvement of the present application, when the intelligent fusion terminal of the transformer area uploads data to the data center each time, the data center verifies the uploaded data according to the equipment archives of the equipment uploading the data: when the equipment passes the verification, the data center receives the reported information and archives it, otherwise it does not receive the corresponding reported information.

[0014] As a further improvement of the present application, the characteristic information for completing the verification in the equipment archives includes: model name, port type, address information, device description, manufacturer ID, reporting flag, node ID and product ID.

[0015] As a further improvement of the present application, the telemetry data related to the reactive power compensation system uploaded by the intelligent terminal of the transformer area to the data center includes: system voltage, system current, system active power, system reactive power, system power factor, system total capacitor current, system compensated capacity value, system total number of capacitors, system partial compensation number, system common compensation number, and the address and life of each capacitor in the reactive power compensation device. Among them, the system voltage, system current, system active power, system reactive power, system power factor and system total capacitor current are measured according to each phase in a three-phase power system.

[0016] As a further improvement of the present application, the remote signaling data related to the reactive power compensation system uploaded by the intelligent terminal of the transformer area to the data center includes: overvoltage lockout state flag, undervoltage lockout state flag, voltage harmonic lockout state flag, current harmonic lockout state flag, communication fault state flag, and failure state flag of each capacitor in the reactive power compensation device. Among them, the overvoltage lockout state flag, undervoltage lockout state flag, voltage harmonic lockout state flag, and current harmonic lockout state flag are respectively represented according to three phases. Each state flag is a binary number. In the overvoltage lockout state flag, undervoltage lockout state flag, voltage harmonic lockout state flag, current harmonic lockout state flag and communication fault state flag, "1" indicates that the state occurs, and "0" indicates that the state recovers. In the failure state flag of each capacitor in the reactive power compensation device, "1" indicates that the capacitor is failed, and "0" indicates that the capacitor is normal.

[0017] As a further improvement of the present application, in the intelligent terminal of the transformer area, the generation method of the failure state flag of the capacitor is as follows:

[0018] (1) Obtain the rated current I of the capacitor n , the calculation formula of the rated current I n is as follows:

[0019] I n =C / U n

[0020] Among them, Un is the rated voltage of the capacitor, and C is the capacitance capacity of the capacitor.

[0021] (2) Obtain the actual voltage U of the current power grid, and then determine the corrected rated current I j of the capacitor through the following formula:

[0022] I j =I n ×U / U n

[0023] (3) According to the corrected rated current I j of the capacitor and the actual current I of the power grid, the life L of the capacitor is calculated through the following formula:

[0024] L = I / I j

[0025] (4) judging whether the capacitor life L satisfies 0.8 <= L <= 1.05, if yes, determining that the failure state of the capacitor is normal, otherwise, determining that the failure state of the capacitor is failure.

[0026] As a further improvement of the application, the index items in the preset target parameters of the reactive power compensation device include: target power factor, control delay, overvoltage threshold value, under-voltage threshold value, capacitor over-current limit value, harmonic voltage over-limit value, harmonic current over-limit value, and CT ratio ratio.

[0027] As a further improvement of the application, the reactive power compensation detection APP needs to create a directory and import a configuration file before installation, and the configuration file mainly includes log management, device profile, and model information. The log configuration attributes include: storage directory, file size, file quantity, file name, debugging information, running information, alarm information, error information, process number, and thread number.

[0028] The application also includes a reactive power compensation remote monitoring system based on a transformer area intelligent fusion terminal, which adopts the reactive power compensation remote monitoring method based on the transformer area intelligent fusion terminal as described above, and realizes remote monitoring and control of the operation state of the reactive power compensation system. The reactive power compensation remote monitoring system includes: a transformer area intelligent fusion terminal, a communication module, a data center, and a management end.

[0029] The transformer area intelligent fusion terminal is electrically connected with the reactive power compensation device and the reactive power compensation controller through the RS485 bus interface. The transformer area intelligent fusion terminal is used to collect the operation state information of the reactive power compensation device, and further obtain the telemetering data related to the reactive power compensation system. The transformer area intelligent fusion terminal is also used to read the state information of the reactive power compensation controller, and further obtain the telesignaling data related to the reactive power compensation system. The transformer area intelligent fusion terminal uploads the telemetering data and the telesignaling data to the data center.

[0030] The communication module is used to establish a communication connection between the transformer area intelligent fusion terminal and the central server running a data center through power carrier communication or Ethernet.

[0031] The data center is in communication connection with the transformer area intelligent fusion terminal, and stores the telemetering data and the telesignaling data uploaded by the transformer area intelligent fusion terminal, and further responds to the data query request of the reactive power compensation state. The data center also generates the adjustment instruction of the reactive power compensation device according to the difference between the real-time operation parameters and the preset target parameters of the reactive power compensation device in the transformer area.

[0032] The management end runs a reactive power compensation detection application program; a management personnel logs in the reactive power compensation detection application program running in the management end, and then accesses the data stored in the data center and related to the reactive power compensation device, inquires the operation parameters and capacitor life of the reactive power compensation device, and issues adjustment instructions to the reactive power compensation device.

[0033] The technical scheme provided by the application has the following beneficial effects:

[0034] In the reactive power compensation remote monitoring method and system based on the transformer area intelligent fusion terminal, the data and instructions are exchanged between the reactive power compensation device and the remote data center through the transformer area intelligent fusion terminal, so that the full-automatic monitoring and full-process dynamic adjustment of the power grid reactive power compensation process are realized, the power factor of the power grid is improved, and the operation quality of the power grid is improved.

[0035] The method provided by the application can not only acquire the operation of the power grid and the reactive power compensation device in real time, but also has the function of evaluating the life of each capacitor in the reactive power compensation device, so that the safety risk of the equipment can be found and treated in time, and the stable operation of the equipment and the power grid can be effectively ensured. DETAILED DESCRIPTION

[0036] The accompanying drawings are included to provide a further understanding of the application and constitute a part of the specification, which together with the embodiments of the application, are used to explain the application and do not constitute a limitation on the application. In the drawings:

[0037] Figure 1 The step flow chart of the reactive power compensation remote monitoring method based on the transformer area intelligent fusion terminal provided in the embodiment 1 of the application.

[0038] Figure 2 The judgment method of the capacitor failure state used in the embodiment 1 of the application.

[0039] Figure 3 The step flow chart of the process that the transformer area intelligent fusion terminal reads the system operation state information and uploads to the data center in the embodiment 1 of the application.

[0040] Figure 4 The topological structure diagram of the reactive power compensation remote monitoring system based on the transformer area intelligent fusion terminal provided in the embodiment 2 of the application.

[0041] Figure 5 The product picture of the reactive power compensation device used in the reactive power compensation remote monitoring system based on the transformer area intelligent fusion terminal of the embodiment 2 of the application.

[0042] Figure 6Product picture of the reactive power compensation controller used in the reactive power compensation remote monitoring system based on the intelligent fusion terminal of the transformer area in embodiment 2 of the present application. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0044] Embodiment 1

[0045] The present embodiment provides a reactive power compensation remote monitoring method based on an intelligent fusion terminal of a transformer area, which is used to realize remote monitoring and control of the operation state of a reactive power compensation system. As shown in Figure 1 , the remote monitoring method includes the following processes:

[0046] I. System deployment phase:

[0047] The intelligent fusion terminal of the transformer area and the reactive power compensation device and its reactive power compensation controller are connected in communication through an RS485 bus interface. The intelligent fusion terminal of the transformer area and the central server of a remote data center are connected in communication through power carrier communication or Ethernet. And the initialization configuration of the interactive state of the intelligent fusion terminal of the transformer area and the data center is completed.

[0048] II. Telemetering and telesignaling phase of reactive power compensation information:

[0049] After the intelligent fusion terminal of the transformer area reaches a preset meter reading cycle, the operation state information of the reactive power compensation device is read, and then the telemetering data related to the reactive power compensation system is obtained. And the state information of the reactive power compensation controller is read, and then the telesignaling data related to the reactive power compensation system is obtained. The intelligent fusion terminal of the transformer area also uploads the telemetering data and the telesignaling data to the data center.

[0050] In the present embodiment, when the intelligent fusion terminal of the transformer area uploads data to the data center each time, the data center checks the uploaded data according to the equipment profile of the equipment uploading the data: when the equipment passes the check, the data center receives the reported information and archives it, otherwise, the corresponding reported information is not received.

[0051] The characteristic information used to complete the check in the equipment profile includes: model name, port type, address information, equipment description, manufacturer ID, reporting flag, node ID and product ID.

[0052] In this embodiment, the telemetry data related to the reactive power compensation system uploaded by the intelligent fusion terminal of the transformer area to the data center includes: system voltage, system current, system active power, system reactive power, system power factor, system total capacitor current, system compensated capacity value, system total number of capacitors, system partial compensation number, system common compensation number, and the address and life of each capacitor in the reactive power compensation device.

[0053] Among them, the system voltage, system current, system active power, system reactive power, system power factor and system total capacitor current are measured according to each phase in the three-phase power system. In turn, it includes: A-phase voltage, B-phase voltage, C-phase voltage, A-phase current, B-phase current, C-phase current, A-phase active power, B-phase active power, C-phase active power, A-phase reactive power, B-phase reactive power, C-phase reactive power, A-phase power factor, B-phase power factor, C-phase power factor, A-phase total capacitor current, B-phase total capacitor current, C-phase total capacitor current.

[0054] In this embodiment, the telemetering data related to the reactive power compensation system uploaded by the intelligent fusion terminal of the transformer area to the data center includes: overvoltage lockout state flag, undervoltage lockout state flag, voltage harmonic lockout state flag, current harmonic lockout state flag, communication fault state flag, and failure state flag of each capacitor in the reactive power compensation device. Among them, the overvoltage lockout state flag, undervoltage lockout state flag, voltage harmonic lockout state flag, and current harmonic lockout state flag are respectively represented according to three phases. Specifically, it includes: A-phase overvoltage lockout state, B-phase overvoltage lockout state, C-phase overvoltage lockout state, A-phase undervoltage lockout state, B-phase undervoltage lockout state, C-phase undervoltage lockout state, A-phase voltage harmonic lockout state, B-phase voltage harmonic lockout state, C-phase voltage harmonic lockout state, A-phase current harmonic lockout state, B-phase current harmonic lockout state, C-phase current harmonic lockout state.

[0055] Each of the above state flags is a binary number. In the overvoltage lockout state flag, undervoltage lockout state flag, voltage harmonic lockout state flag, current harmonic lockout state flag and communication fault state flag, "1" indicates that the state occurs, and "0" indicates that the state recovers. In the failure state flag of each capacitor of the reactive power compensation device, "1" indicates that the capacitor fails, and "0" indicates that the capacitor is normal.

[0056] In the intelligent fusion terminal of the transformer area, the life evaluation of the capacitor is calculated and evaluated by comparing the actual current of the capacitor with the rated current. When the capacitor is applied with rated voltage, the actual current of the functional capacitor should be 80%-105% of the rated current; if the actual current is less than 80% of the rated current, the capacitor is considered to be invalid. Therefore, as shown in Figure 2 The generation method of the failure state flag of the capacitor is as follows:

[0057] (1) Obtain the rated current I of the capacitor n , the rated current I n is calculated as follows:

[0058] I n = C / U n

[0059] Wherein, Un is the rated voltage of the capacitor, C is the capacitance of the capacitor.

[0060] (2) Obtain the actual voltage U of the current power grid, and then determine the corrected rated current I of the capacitor through the following formula: j

[0061] I j = I n × U / U n

[0062] (3) According to the corrected rated current I of the capacitor j and the actual current I of the power grid, the life L of the capacitor is calculated through the following formula:

[0063] L = I / I j

[0064] (4) Determine whether the life L of the capacitor meets 0.8≤L≤1.05. If yes, it is determined that the failure state of the capacitor is normal, otherwise it is determined that the failure state of the capacitor is failure.

[0065] In addition, as shown in Figure 3 , in the present embodiment, the intelligent terminal of the transformer area fuses the running state information of the power grid and the reactive power compensation device at each time. First, query whether there is a new sub-device in the system: if there is a sub-device, it means that the system is normal, so the device data is automatically read when the meter reading period arrives; If no new sub-device is found, automatically verify the to-be-assigned sub-device, and add it to the system after verification, and read the device running state information of the new sub-device. Finally, upload the read device data to the data center.

[0066] Three, remote control and remote adjustment stage of reactive power compensation state:

[0067] The data center calculates the real-time running parameters of the device according to the running state information of each reactive power compensation device and its reactive power compensation controller in the transformer area. The transformer area power grid administrator queries the real-time running parameters of the reactive power compensation device in the transformer area through the data center, and issues adjustment instructions to the reactive power compensation device according to the difference between the preset target parameters and the real-time running parameters of each reactive power compensation device in the transformer area. The adjustment instruction is transmitted to the reactive power compensation controller by the reactive power compensation detection APP, and the reactive power compensation controller executes the adjustment instruction to complete the remote control and adjustment of the reactive power compensation state of the transformer area.​

[0068] In this embodiment, during the initial configuration of the interaction between the smart converged terminal in the distribution area and the data center, the smart converged terminal needs to read the model information in the configuration file, complete registration in the data center, and initialize the log file. The data center performs initialization settings based on the smart converged terminal, stores device files for the smart converged terminal and all its corresponding devices, and waits to receive data uploaded by the smart converged terminal. The device files are used for data verification during the interaction phase.

[0069] In this embodiment, the preset target parameters of the reactive power compensation device include: target power factor, control delay, overvoltage threshold, undervoltage threshold, capacitor overcurrent limit, harmonic voltage over-limit, harmonic current over-limit, and CT ratio.

[0070] Before installing the reactive power compensation detection app, you need to create a directory and import a configuration file. The configuration file mainly includes log management, device files, and model information. Among them, the log configuration attributes include: storage directory, file size, number of files, file name, debugging information, running information, alarm information, error information, process ID, and thread ID.

[0071] Example 2

[0072] This embodiment provides a reactive power compensation remote monitoring system based on a smart converged terminal for distribution transformer areas. This system employs the reactive power compensation remote monitoring method based on a smart converged terminal for distribution transformer areas as described in Embodiment 1, enabling remote monitoring and control of the reactive power compensation system's operating status. Figure 4 As shown, the reactive power compensation remote monitoring system includes: a smart converged terminal for the transformer area, a communication module, a data center, and a management terminal.

[0073] The intelligent integrated terminal of the distribution area is electrically connected to the reactive power compensation device and the reactive power compensation controller via an RS485 bus interface. The reactive power compensation device and the reactive power compensation controller are respectively as follows: Figure 5 and Figure 6 As shown, the intelligent converged terminal in the distribution area collects the operating status information of the reactive power compensation device, thereby obtaining telemetry data related to the reactive power compensation system. It also reads the status information of the reactive power compensation controller, thereby obtaining remote signaling data related to the reactive power compensation system. The intelligent converged terminal in the distribution area uploads the telemetry data and remote signaling data to the data center.

[0074] The communication module is used to establish a communication connection between the smart converged terminal in the distribution area and a central server running a data center via power line carrier communication (HPLC) or Ethernet. In this embodiment, data transmission between the smart converged terminal in the distribution area and the server can be achieved via Ethernet or via power line carrier communication.

[0075] The data center communicates with the intelligent converged terminals in the distribution area and categorizes and stores the telemetry and teleindication data uploaded by the terminals, thereby responding to data query requests regarding reactive power compensation status. The data center also generates adjustment commands for the reactive power compensation devices based on the differences between the real-time operating parameters and preset target parameters of the devices in the distribution area.

[0076] A reactive power compensation detection application runs within the management terminal. Administrators log into the reactive power compensation detection application running in the management terminal, and then access the data related to the reactive power compensation device stored in the data center, query the operating parameters and capacitor life of the reactive power compensation device, and issue adjustment commands to the reactive power compensation device.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas, characterized in that, It is used to remotely monitor and control the operating status of the reactive power compensation system; the remote monitoring method includes the following process: I. System Deployment Phase: The intelligent converged terminal of the distribution area is connected to the reactive power compensation device and its reactive power compensation controller through an RS485 bus interface. The intelligent converged terminal of the distribution area establishes a communication connection with the central server of a remote data center through power line carrier communication or Ethernet, and completes the initial configuration of the interaction status between the intelligent converged terminal of the distribution area and the data center. II. Telemetry and telesignaling phase of reactive power compensation information: After the preset meter reading cycle is reached, the intelligent converged terminal in the distribution area reads the operating status information of the reactive power compensation device, and then obtains telemetry data related to the reactive power compensation system. The system also reads the status information of the reactive power compensation controller to obtain remote signaling data related to the reactive power compensation system; the intelligent converged terminal of the distribution area also uploads the telemetry data and remote signaling data to the data center. The remote signaling data uploaded by the intelligent converged terminal of the transformer area to the data center and the reactive power compensation system includes: overvoltage blocking status flags, undervoltage blocking status flags, voltage harmonic blocking status flags, current harmonic blocking status flags, communication fault status flags, and failure status flags of each capacitor in the reactive power compensation device; the method for generating the capacitor failure status flags is as follows: (1) Obtain the rated current I of the capacitor n Rated current I n The calculation formula is as follows: I n =C / U n Where Un is the rated voltage of the capacitor, and C is the capacitance of the capacitor; (2) Obtain the actual voltage U of the current power grid, and then determine the corrected rated current I of the capacitor using the following formula. j : I j =I n ×U / U n (3) Based on the corrected rated current I of the capacitor j Given the actual current I of the power grid, the lifespan L of the capacitor is calculated using the following formula: L=I / I j (4) Determine whether the capacitor life L satisfies 0.8≤L≤1.

05. If yes, the capacitor failure state is normal; otherwise, the capacitor failure state is failure. III. Remote control and adjustment stage under reactive power compensation: The data center calculates the real-time operating parameters of each reactive power compensation device and its controller in the distribution area based on the operating status information. The power grid administrator of the distribution area queries the real-time operating parameters of the reactive power compensation devices in the distribution area through the data center, and issues adjustment commands to the reactive power compensation devices based on the difference between the preset target parameters and the real-time operating parameters of each reactive power compensation device in the distribution area. The adjustment commands are transmitted to the reactive power compensation controller by the reactive power compensation detection APP, and the reactive power compensation controller executes the adjustment commands to complete the remote control and adjustment of the reactive power compensation status of the distribution area.

2. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 1, characterized in that: During the initial configuration process of the interaction between the smart converged terminal and the data center, the smart converged terminal needs to read the model information in the configuration file, register with the data center, and initialize the log file. The data center performs initialization settings based on the smart converged terminal, stores the device files of the smart converged terminal and all its corresponding devices, and waits to receive data uploaded by the smart converged terminal. The device files are used to perform data verification during the interaction phase.

3. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 2, characterized in that: Each time the intelligent converged terminal in the distribution area uploads data to the data center, the data center verifies the uploaded data according to the device file of the uploaded data: if the device passes the verification, the data center receives the reported information and archives it; otherwise, it does not receive the corresponding reported information.

4. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 3, characterized in that: The feature information used to complete the verification in the device file includes: model name, port type, address information, device description, manufacturer ID, reporting flag, node ID, and product ID.

5. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 1, characterized in that: The telemetry data uploaded by the intelligent integrated terminal of the distribution area to the data center and related to the reactive power compensation system includes: system voltage, system current, system active power, system reactive power, system power factor, system total capacitor current, system compensated capacity value, total number of system capacitors, number of system individual compensations, and number of system common compensations; as well as the address and lifespan of each capacitor in the reactive power compensation device; wherein, the system voltage, system current, system active power, system reactive power, system power factor, and system total capacitor current are all measured separately for each phase in the three-phase power system.

6. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 5, characterized in that: The overvoltage lockout status flag, undervoltage lockout status flag, voltage harmonic lockout status flag, and current harmonic lockout status flag are all represented separately for each of the three phases; each status flag is a binary number; in the overvoltage lockout status flag, undervoltage lockout status flag, voltage harmonic lockout status flag, current harmonic lockout status flag, and communication fault status flag, "1" indicates that the status has occurred, and "0" indicates that the status has recovered; in the failure status flags of each capacitor of the reactive power compensation device, "1" indicates that the capacitor has failed, and "0" indicates that the capacitor is normal.

7. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 1, characterized in that: The preset target parameters of the reactive power compensation device include: target power factor, control delay, overvoltage threshold, undervoltage threshold, capacitor overcurrent limit, harmonic voltage over-limit, harmonic current over-limit, and CT ratio.

8. The method for remote monitoring of reactive power compensation based on a smart converged terminal for distribution transformer areas as described in claim 1, characterized in that: Before installing the reactive power compensation detection app, you need to create a directory and import a configuration file. The configuration file mainly includes log management, device files, and model information. The configuration attributes of the logs include: storage directory, file size, number of files, file name, debugging information, runtime information, alarm information, error information, process ID, and thread ID.

9. A reactive power compensation remote monitoring system based on a smart converged terminal for distribution transformers, characterized in that: The reactive power compensation remote monitoring system employs the reactive power compensation remote monitoring method based on a transformer substation intelligent fusion terminal as described in any one of claims 1-8, to realize remote monitoring and control of the reactive power compensation system's operating status; the reactive power compensation remote monitoring system includes: The intelligent converged terminal for the distribution area is electrically connected to the reactive power compensation device and the reactive power compensation controller via an RS485 bus interface. The intelligent converged terminal is used to collect the operating status information of the reactive power compensation device to obtain telemetry data related to the reactive power compensation system; and to read the status information of the reactive power compensation controller to obtain remote signaling data related to the reactive power compensation system. The intelligent converged terminal is also used to upload the telemetry data and remote signaling data to the data center. A communication module, which is used to establish a communication connection between the smart converged terminal in the distribution area and a central server running a data center via power line carrier communication or Ethernet; The data center is communicatively connected to the intelligent converged terminal of the distribution area, and classifies and stores the telemetry and teleindication data uploaded by the intelligent converged terminal, thereby responding to data query requests for reactive power compensation status; the data center also generates adjustment instructions for the reactive power compensation devices based on the differences between the real-time operating parameters and preset target parameters of the reactive power compensation devices in the distribution area; and The management terminal runs a reactive power compensation detection application. Administrators log in to the reactive power compensation detection application running on the management terminal, and then access the data related to the reactive power compensation device stored in the data center, query the operating parameters and capacitor life of the reactive power compensation device, and issue adjustment commands to the reactive power compensation device.

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