Intelligent box transformer control system

Abstract

The utility model belongs to the technical field of medium -voltage equipment for power system, concretely relates to an intelligent box -type transformer control system, including box -type transformer high voltage cabinet, sets up high pressure DTU module, low pressure TTU monitoring module in the box -type transformer, high pressure DTU module is the DTU of possessing measurement and control, fault processing and line loss measurement function, low pressure TTU monitoring module is used for directly measuring low voltage side voltage, current, and calculates power and power factor, and simultaneously, low -voltage electric energy data is gathered and stored, intelligent environment management module is used for integrated monitoring and control humidity, temperature and smoke concentration, high pressure DTU module is connected with low pressure TTU monitoring module and intelligent environment management module communication respectively, constitutes an intelligent control device of collaborative work, is used for sending the data and the alarm information generated to master station with each module collection, the utility model solves the problem that traditional box -type transformer control system is dispersed, single function, collaborative poor.

Description

Technical Field

[0001] This utility model belongs to the technical field of medium-voltage equipment for power systems, and specifically relates to an intelligent prefabricated substation control system. Background Technology

[0002] In power systems, traditional prefabricated substations typically adopt a configuration of "prefabricated substation plus high-voltage switchgear, transformer plus low-voltage switchgear." The substation is equipped with lighting and fans. Metering signals from the high-voltage switchgear are transmitted to the control center via meter communication, while remote control signals are transmitted via integrated protection devices for automated control. Transformer signals are transmitted to the high-voltage integrated protection device, while the low-voltage switchgear relies on its own protection mechanism. However, this traditional configuration suffers from problems such as system fragmentation, low integration, poor information sharing, and weak collaborative control capabilities, making it difficult to meet the advanced requirements of modern smart grids for comprehensive equipment status perception, efficient collaborative operation, and lean maintenance. Therefore, a highly integrated and intelligently collaborative prefabricated substation control device is urgently needed. Utility Model Content

[0003] The purpose of this invention is to provide an intelligent prefabricated substation control system to solve the problems of traditional prefabricated substation control systems being decentralized, having limited functions, and lacking coordination.

[0004] The specific technical solution adopted by this utility model is as follows: An intelligent prefabricated substation control system includes a prefabricated substation high-voltage cabinet, wherein the prefabricated substation is equipped with a high-voltage DTU module, a low-voltage TTU monitoring module, a low-voltage cabinet energy meter, a high-voltage cabinet energy meter, and an intelligent environmental management module; The high-voltage DTU module is integrated in the high-voltage cabinet of the transformer substation. The high-voltage DTU module is a DTU with measurement and control, fault handling and line loss measurement functions. The low-voltage TTU monitoring module is integrated in the low-voltage cabinet of the transformer substation. The low-voltage TTU monitoring module is connected to a low-voltage switch, current and voltage signal sensors and a compensation controller. The low-voltage TTU monitoring module is a TTU configured in the low-voltage cabinet of the transformer substation, used to directly measure the voltage and current on the low-voltage side, calculate the power and power factor, and collect and store low-voltage power data. The intelligent environmental management module is installed in the high-voltage and low-voltage cabinets of the transformer substation and is used to integrate monitoring and control humidity, temperature and smoke concentration. When the intelligent environmental management module detects that the smoke concentration has reached the threshold, it can automatically stop the heater or the fan from running. The high-voltage DTU module is communicatively connected to the low-voltage TTU monitoring module and the intelligent environmental management module, forming a collaborative intelligent control device used to send the data collected by each module and the alarm information generated to the main station.

[0005] Preferably, the high-voltage DTU module and the low-voltage TTU monitoring module in the transformer substation high-voltage cabinet are both connected to an initial switch, the master station is connected to a station control layer switch, and the optical port of the initial switch and the optical port of the station control layer switch are connected by optical fiber.

[0006] Preferably, the master station includes a background monitoring host, a printer, and a power system time synchronization device, and the master station performs log auditing and intrusion detection functions.

[0007] Preferably, the high-voltage DTU module is connected to several high-voltage cabinets, and each high-voltage cabinet is connected to a transformer status monitoring module. The transformer status monitoring module is used to collect the oil temperature, gas protection status, and on-load tap changer of the oil-immersed transformer, or the winding temperature and fan status of the dry-type transformer, and connects the non-electrical signals to the high-voltage DTU module.

[0008] Preferably, the high-voltage cabinet energy meter is used to measure the power consumption of the high-voltage DTU module in the high-voltage cabinet of the transformer substation, and the low-voltage cabinet energy meter is used to measure the power consumption of the low-voltage TTU monitoring module in the low-voltage cabinet of the transformer substation. The high-voltage cabinet energy meter and the low-voltage cabinet energy meter are connected to the energy acquisition device via RS-485 protocol. The energy acquisition device is connected to a longitudinal encryption authentication device and a GPRS wireless device.

[0009] The technical effects achieved by this utility model are as follows: This utility model has the advantages of high integration and collaborative operation; by integrating multiple subsystems such as the high-voltage side DTU, transformer status monitoring, low-voltage side TTU, and transformer substation environmental management into a unified intelligent control device, it breaks the traditional situation of isolated information between units in transformer substations and realizes the integration of information and coordinated linkage of functions across the entire station.

[0010] This invention enables comprehensive status perception: it not only covers electrical quantities such as voltage, current, and power, but also deeply integrates the status of the transformer itself and the internal operating environment of the transformer substation; the transformer itself status includes oil temperature, gas, and winding temperature; the internal operating environment of the transformer substation includes temperature, humidity, and smoke, thus achieving comprehensive and real-time perception of the transformer substation's operating status.

[0011] This utility model has a high level of intelligence; it has advanced functions such as fault handling, line loss measurement, automatic protection, and information security protection; for example, the environmental management system cuts off the heating / fan when there is smoke; thus improving the automation and intelligent operation level of the transformer substation.

[0012] This invention significantly improves operational efficiency; unified data transmission and timestamped alarm information facilitate centralized monitoring and fault analysis by the main station, greatly enhancing operational efficiency and the timeliness of fault handling. Attached Figure Description

[0013] Figure 1 This is a structural diagram of an intelligent prefabricated substation control system according to this utility model; Figure 2 This is a system block diagram of an intelligent prefabricated substation control system according to this utility model. Detailed Implementation

[0014] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0015] like Figure 1 As shown, an intelligent prefabricated substation control system includes a prefabricated substation high-voltage cabinet, wherein a high-voltage DTU module, a low-voltage TTU monitoring module, a low-voltage cabinet energy meter, and a high-voltage cabinet energy meter are installed inside the prefabricated substation. The high-voltage DTU module is integrated in the high-voltage cabinet of the transformer substation. The high-voltage DTU module is a DTU with measurement and control, fault handling and line loss measurement functions. The low-voltage TTU monitoring module is integrated in the low-voltage cabinet of the transformer substation. The low-voltage TTU monitoring module is connected to a low-voltage switch, current and voltage signal sensors and a compensation controller. The low-voltage TTU monitoring module is a TTU configured in the low-voltage cabinet of the transformer substation, used to directly measure the voltage and current on the low-voltage side, calculate the power and power factor, and collect and store low-voltage power data. The intelligent environmental management module is installed in the high-voltage and low-voltage cabinets of the transformer substation and is used to integrate monitoring and control humidity, temperature and smoke concentration. When the intelligent environmental management module detects that the smoke concentration has reached the threshold, it can automatically stop the heater or the fan from running. The high-voltage DTU module is communicatively connected to the low-voltage TTU monitoring module and the intelligent environmental management module, forming a collaborative intelligent control device used to send the data collected by each module and the alarm information generated to the main station.

[0016] Preferably, the high-voltage DTU module and the low-voltage TTU monitoring module in the transformer substation high-voltage cabinet are both connected to an initial switch, the master station is connected to a station control layer switch, and the optical port of the initial switch and the optical port of the station control layer switch are connected by optical fiber.

[0017] Preferably, the master station includes a background monitoring host, a printer, and a power system time synchronization device, and the master station performs log auditing and intrusion detection functions.

[0018] Preferably, the high-voltage DTU module is connected to several high-voltage cabinets, and each high-voltage cabinet is connected to a transformer status monitoring module. The transformer status monitoring module is used to collect the oil temperature, gas protection status, and on-load tap changer of the oil-immersed transformer, or the winding temperature and fan status of the dry-type transformer, and connects the non-electrical signals to the high-voltage DTU module.

[0019] Preferably, the high-voltage cabinet energy meter is used to measure the power consumption of the high-voltage DTU module in the high-voltage cabinet of the transformer substation, and the low-voltage cabinet energy meter is used to measure the power consumption of the low-voltage TTU monitoring module in the low-voltage cabinet of the transformer substation. The high-voltage cabinet energy meter and the low-voltage cabinet energy meter are connected to the energy acquisition device via RS-485 protocol. The energy acquisition device is connected to a longitudinal encryption authentication device and a GPRS wireless device.

[0020] This utility model has the advantages of high integration and collaborative operation; by integrating multiple subsystems such as the high-voltage side DTU, transformer status monitoring, low-voltage side TTU, and transformer substation environmental management into a unified intelligent control device, it breaks the traditional situation of isolated information between units in transformer substations and realizes the integration of information and coordinated linkage of functions across the entire station.

[0021] This invention enables comprehensive status perception: it not only covers electrical quantities such as voltage, current, and power, but also deeply integrates the status of the transformer itself and the internal operating environment of the transformer substation; the transformer itself status includes oil temperature, gas, and winding temperature; the internal operating environment of the transformer substation includes temperature, humidity, and smoke, thus achieving comprehensive and real-time perception of the transformer substation's operating status.

[0022] This utility model has a high level of intelligence; it has advanced functions such as fault handling, line loss measurement, automatic protection, and information security protection; for example, the environmental management system cuts off the heating / fan when there is smoke; thus improving the automation and intelligent operation level of the transformer substation.

[0023] This invention significantly improves operational efficiency; unified data transmission and timestamped alarm information facilitate centralized monitoring and fault analysis by the main station, greatly enhancing operational efficiency and the timeliness of fault handling. In this utility model, the high-voltage cabinet and high-voltage DTU module of the transformer substation adopt a modular, scalable, low-power, and maintenance-free design standard, adapting to complex operating environments and possessing high reliability and stability. The DTU has measurement and control and fault handling functions, line loss measurement functions, energy consumption zeroing functions, and management functions including time synchronization, supporting master station protocol and master station protocol time synchronization, and accurate positioning; it also has the function of uploading positioning data to the master station. It features information security protection functions implemented with an embedded security chip.

[0024] The transformer in the box-type substation connects non-electrical signals to the high-voltage cabinet and uploads them to the main station through the high-voltage DTU module.

[0025] The low-voltage switchgear of the transformer substation is equipped with a low-voltage TTU monitoring module, which features transformer data acquisition. The terminal is designed with analog signal acquisition circuits for voltage and current, allowing direct measurement of voltage and current data, and calculation of parameters such as power and power factor based on the acquired data. The terminal has an interface for communication with sensors monitoring the distribution transformer, enabling real-time monitoring of the transformer's operating conditions and environment, including oil temperature and gas protection status for oil-immersed transformers, tap position status for on-load tap-changing / capacity-changing transformers, winding temperature for dry-type transformers, and fan status for dry-type transformers. The low-voltage TTU monitoring module acquires, stores, and transmits low-voltage electrical data to the main station.

[0026] The high-voltage and low-voltage switchgear inside the transformer substation are equipped with an intelligent environmental management module integrating anti-condensation, salt spray corrosion, temperature monitoring, and smoke alarm functions. This enables humidity monitoring, temperature monitoring, and early detection of overheating and fire hazards within the substation. The device also has the function of automatically stopping the heater or fan when the smoke concentration reaches a threshold, to prevent the fault from escalating. The controller also has communication capabilities with a host computer, configured with an RS-485 interface / Modbus-RTU protocol, facilitating the acquisition of relevant data and timestamped alarm information recording by the host system.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An intelligent prefabricated substation control system, characterized in that: The transformer includes a prefabricated substation, which is equipped with a high-voltage DTU module, a low-voltage TTU monitoring module, a low-voltage cabinet energy meter, a high-voltage cabinet energy meter, and an intelligent environmental management module. The high-voltage DTU module is integrated in the high-voltage cabinet of the transformer substation. The high-voltage DTU module is a DTU with measurement and control, fault handling and line loss measurement functions. The low-voltage TTU monitoring module is integrated in the low-voltage cabinet of the transformer substation. The low-voltage TTU monitoring module is connected to a low-voltage switch, current and voltage signal sensors and a compensation controller. The low-voltage TTU monitoring module is a TTU configured in the low-voltage cabinet of the transformer substation, used to directly measure the voltage and current on the low-voltage side, calculate the power and power factor, and collect and store low-voltage power data. The intelligent environmental management module is installed in the high-voltage and low-voltage cabinets of the transformer substation and is used to integrate monitoring and control humidity, temperature and smoke concentration. The high-voltage DTU module is communicatively connected to the low-voltage TTU monitoring module and the intelligent environmental management module, forming a collaborative intelligent control device used to send the data collected by each module and the alarm information generated to the main station.

2. The intelligent prefabricated substation control system according to claim 1, characterized in that: The high-voltage DTU module and low-voltage TTU monitoring module in the transformer substation high-voltage cabinet are both connected to an initial switch. The main station is connected to a station control layer switch. The optical ports of the initial switch and the optical ports of the station control layer switch are connected by optical fiber.

3. The intelligent prefabricated substation control system according to claim 1, characterized in that: The master station includes a background monitoring host, a printer, and a power system time synchronization device. The master station performs log auditing and intrusion detection functions.

4. The intelligent prefabricated substation control system according to claim 1, characterized in that: The high-voltage DTU module is connected to several high-voltage cabinets, and each high-voltage cabinet is connected to a transformer status monitoring module. The transformer status monitoring module is used to collect the oil temperature, gas protection status, and on-load tap changer of oil-immersed transformers, or the winding temperature and fan status of dry-type transformers, and connects non-electrical signals to the high-voltage DTU module.

5. The intelligent prefabricated substation control system according to claim 1, characterized in that: The high-voltage cabinet energy meter is used to measure the power consumption of the high-voltage DTU module in the high-voltage cabinet of the transformer substation. The low-voltage cabinet energy meter is used to measure the power consumption of the low-voltage TTU monitoring module in the low-voltage cabinet of the transformer substation. The high-voltage cabinet energy meter and the low-voltage cabinet energy meter are connected to the power acquisition device via RS486 protocol. The power acquisition device is connected to a longitudinal encryption authentication device and a GPRS wireless device.

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