Box transformer substation environment control system based on touch control all-in-one machine

Abstract

The invention discloses a box transformer substation environment control system based on a touch control all-in-one machine, and belongs to the field of box transformer substation environment monitoring and control. The system comprises a touch control all-in-one machine, an intelligent gateway, a PT100, 8PT-485 transmitter, a temperature and humidity sensor, a smoke concentration sensor, a power supply module, a dehumidifier, a relay, a heating plate, a cooling fan and a water leakage rope. By integrating various communication interfaces such as 485, TCP and the like, flexible butt joint with a box transformer substation internal protection device is realized, the problem of single communication interface of a traditional system is solved, and environment data, equipment state and alarm information can be ensured to be efficiently transmitted to the protection device and transformer substation background equipment. The dew-point temperature is calculated based on the temperature and the humidity, the hierarchical dehumidification strategy is formulated in combination with the difference between the top plate temperature and the dew-point temperature, the cooling fan is controlled in cooperation with the temperature threshold, and compared with a traditional control mode, the control method is more accurate, the internal environment of the box transformer substation can be effectively kept stable, and equipment faults are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to a box transformer environment monitoring and control, in particular to a box transformer environment control system based on a touch all-in-one machine. BACKGROUND

[0002] The existing box transformer environment control system is mostly a monitoring device independently running, and has poor communication compatibility with the internal protection device of the box transformer and the background equipment of the transformer substation, and it is difficult to realize linkage of the environmental data and the protection system. For example, the environmental monitoring data can only be displayed locally, and cannot be transmitted to the protection device through a standardized interface, so that it is difficult for the operation and maintenance personnel to comprehensively master the operation state of the box transformer.

[0003] In terms of data acquisition and control, the communication interface of the traditional system is single, and only one of 485 or TCP is supported, and different types of protection devices cannot be flexibly adapted; and the control logic lacks fine application of the dew point temperature, and the accuracy of the dehumidification and heat dissipation operation is insufficient, and the operation environment of the equipment is unstable. Meanwhile, the remote function and the local communication function of the existing system have low combination degree, and the multi-path transmission of the environmental data, the equipment state and the alarm information cannot be realized, and the operation and maintenance efficiency is affected. SUMMARY

[0004] The purpose of the application is to provide a box transformer environment control system based on a touch all-in-one machine, so as to solve the problems that the existing box transformer environment control system cannot realize linkage of the environmental data and the protection system.

[0005] Technical scheme: the box transformer environment control system based on the touch all-in-one machine comprises a touch all-in-one machine, an intelligent gateway, a PT100, an 8PT-to-485 converter, a temperature and humidity sensor, a smoke concentration sensor, a power module, a dehumidifier, a relay, a heating plate, a heat dissipation fan and a water leakage rope. The signal output end of the 8-way PT100 is connected with the signal input end of the 8PT-to-485 converter, and the signal output end of the 8PT-to-485 converter is connected with the 485 interface of the touch all-in-one machine through the 485 bus; The signal output ends of the 6-way temperature and humidity sensor and the 3-way smoke sensor are directly connected with the 485 interface of the touch all-in-one machine; The signal output end of the water leakage rope is connected with the on-off quantity input interface of the touch all-in-one machine; The output end of the 24V power module is connected with the power input end of the touch all-in-one machine, the intelligent gateway, the 8PT-to-485 converter, the temperature and humidity sensor and the smoke sensor, and power is supplied to them; The control output end of the touch all-in-one machine is connected with the power input end of the dehumidifier, the heating plate and the heat dissipation fan through the relay, and start-stop control is realized on these devices; The communication interface (including 485 interface, TCP interface) of the touch all-in-one machine is connected with the corresponding communication interface of the internal protection device of the box transformer; The touch all-in-one machine is connected with the intelligent gateway through a communication line, and the intelligent gateway is connected with the cloud platform network; The dry contact output end of the touch all-in-one machine corresponds to the signal output end of the water immersion alarm, transformer oil temperature alarm, transformer oil temperature trip and smoke alarm respectively; After the touch all-in-one machine receives the temperature and humidity data, it calculates the dew point temperature based on the temperature and humidity by using the built-in algorithm, and formulates a hierarchical dehumidification strategy combined with the difference between the ceiling temperature and the dew point temperature, and controls the cooling fan in cooperation with the temperature threshold.

[0006] Advantages: (1) Multi-interface communication adaptation: by integrating multiple communication interfaces such as 485 and TCP, flexible docking with the internal protection device of the box transformer is realized, the problem of single communication interface in traditional systems is solved, and environmental data, equipment status and alarm information can be efficiently transmitted to the protection device and the substation background equipment.

[0007] (2) Fine environmental control: based on the calculation of dew point temperature based on temperature and humidity, and combined with the difference between the ceiling temperature and the dew point temperature, a hierarchical dehumidification strategy is formulated, and the cooling fan is controlled in cooperation with the temperature threshold, which is more accurate than the traditional control method, and can effectively maintain the stability of the internal environment of the box transformer and reduce equipment failures.

[0008] (3) Multi-path data transmission: through the intelligent gateway, remote data interaction with the cloud platform is realized, and through communication with the protection device, local data is transmitted to the substation background, forming a "local + remote" dual-path data transmission mode, improving the reliability and operation convenience of data.

[0009] (4) Comprehensive alarm mechanism: integrating multiple alarm types such as water immersion, smoke, transformer oil temperature, etc., and through dry contact output and linkage with the protection device, it ensures that abnormal conditions can be discovered and handled in time, improving the safety of box transformer operation. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the system architecture diagram of the present application. DETAILED DESCRIPTION

[0011] In order to make the technical scheme of the present application clearer, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0012] 1. Parameter acquisition: 8 PT100s are respectively installed in the high-voltage chamber, low-voltage chamber, ceiling of the transformer chamber and near the key equipment to collect temperature signals in each area, which are converted into 485 signals by 8 PT to 485 transducers and then transmitted to the touch all-in-one machine; 6-way temperature and humidity sensors are arranged in high-voltage chamber (2-way), low-voltage chamber (2-way), transformer chamber (1-way), and outdoor (1-way) to collect temperature and humidity data of the corresponding areas and send them to the touch all-in-one machine; 3-way smoke sensors are installed on the top of the high-voltage chamber, low-voltage chamber, and transformer chamber to collect smoke concentration signals in real time and transmit them to the touch all-in-one machine; Water leakage ropes are laid along the areas prone to water accumulation at the bottom of the box transformer, and their detection signals are connected to the touch all-in-one machine; The transformer internal oil temperature signal is connected to the analog input interface of the touch all-in-one machine.

[0013] 2. Data processing and control: After receiving the temperature and humidity data, the touch all-in-one machine calculates the dew point temperature of each area using the built-in algorithm; Dehumidification control: When the relative humidity of any one way reaches the set threshold (such as 85% RH), the touch all-in-one machine triggers an alarm and starts the dehumidifier through the relay. When the difference between the ceiling temperature and the maximum dew point temperature is ≤3℃, start the condensing module to dehumidify; when the difference is ≤1℃, start the heating plate to dehumidify; when the difference is ≤0℃, trigger an alarm; Heat dissipation control: When the PT100 detection temperature reaches the starting threshold (such as 40℃), the touch all-in-one machine starts the cooling fan; when the temperature reaches the alarm threshold (such as 50℃), trigger a high-temperature alarm; Alarm processing: When the water leakage rope detects water immersion, the touch all-in-one machine outputs a dry contact alarm signal; when the smoke concentration reaches the set threshold, it outputs a dry contact alarm signal; when the transformer oil temperature reaches the high-temperature alarm threshold (such as 85℃), it outputs a dry contact alarm signal; when it reaches the over-temperature trip threshold (such as 95℃), it outputs a dry contact trip signal.

[0014] 3. Communication and data transmission: The touch all-in-one machine communicates with the internal protection device of the box transformer through the 485 interface or TCP interface, transmits environmental data (temperature and humidity, temperature), equipment operating status (dehumidifier, heating plate, fan start-stop status), alarm information (high temperature, water leakage, smoke, etc.) to the protection device, and then sends them to the substation backend equipment by the protection device; The touch all-in-one machine uploads all collected information to the cloud platform through the intelligent gateway, and users can realize real-time state monitoring, remote control, historical data query, curve display, etc. through the cloud platform.

[0015] This system can realize comprehensive collection and accurate control of box transformer environmental parameters, with communication response time ≤1 second, environmental control precision improved to ±2% RH, alarm signal transmission delay ≤2 seconds, effectively ensuring stable operation of the box transformer and reducing operation and maintenance costs.

[0016] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A prefabricated substation environmental control system based on a touch screen all-in-one machine, characterized in that, The system includes a touch-screen all-in-one machine, a smart gateway, a PT100 transmitter, an 8PT to 485 transmitter, a temperature and humidity sensor, a smoke concentration sensor, a power module, a dehumidifier, a relay, a heating plate, a cooling fan, and a drain rope; the connection relationships between each part are as follows: The signal output terminal of the PT100 is connected to the signal input terminal of the 8PT to 485 transmitter, and the signal output terminal of the 8PT to 485 transmitter is connected to the touch screen all-in-one machine through the 485 bus. The signal output terminals of the temperature and humidity sensor and the smoke sensor are directly connected to the touch screen all-in-one machine; The signal output end of the leaking rope is connected to the switch input interface of the touch screen all-in-one machine; The output of the power module is connected to the power input of the touch screen all-in-one machine, smart gateway, 8PT to 485 transmitter, temperature and humidity sensor, and smoke sensor, respectively. The control output terminal of the touch screen all-in-one machine is connected to the power input terminals of the dehumidifier, heating plate, and cooling fan respectively via relays; The touch screen all-in-one machine is connected to the smart gateway via a communication cable, and the smart gateway is connected to the cloud platform network. After receiving temperature and humidity data, the touch screen all-in-one machine uses a built-in algorithm to calculate the dew point temperature based on temperature and humidity, and combines the difference between the top plate temperature and the dew point temperature to formulate a graded dehumidification strategy, and controls the cooling fan in conjunction with the temperature threshold.

2. The prefabricated substation environmental control system based on a touch screen all-in-one machine according to claim 1, characterized in that, The communication interfaces of a touch screen all-in-one machine include, but are not limited to, the 485 interface and the TCP interface.

3. The prefabricated substation environmental control system based on a touch screen all-in-one machine according to claim 2, characterized in that, The signal output terminals of the 8PT to 485 transmitter, temperature and humidity sensor, and smoke sensor are all connected to the 485 interface of the touch screen all-in-one machine.

4. The prefabricated substation environmental control system based on a touch screen all-in-one machine according to claim 1, characterized in that, The PT100 is an 8-channel PT100, the temperature and humidity sensor is a 6-channel temperature and humidity sensor, the smoke sensor is a 3-channel smoke sensor, and the power supply module is a 24V power supply module.

5. The prefabricated substation environmental control system based on a touch screen all-in-one machine according to claim 2, characterized in that, The communication interface of the touch screen all-in-one machine is connected to the corresponding communication interface of the internal protection device of the transformer substation.

6. The prefabricated substation environmental control system based on a touch screen all-in-one machine according to claim 1, characterized in that, The dry contact output terminals of the touch screen all-in-one machine correspond to the signal output terminals for water immersion alarm, transformer oil temperature alarm, transformer oil temperature trip, and smoke alarm, respectively.

Images