Comprehensive heat preservation temperature compensation device

Abstract

The utility model relates to a comprehensive protection temperature compensation device which comprises a high-voltage cabinet, an instrument room, a comprehensive protection device, a temperature control assembly and a UPS power supply circuit, the comprehensive protection device is arranged in the instrument room, the instrument room is arranged in the high-voltage cabinet, the temperature control assembly is arranged beside the comprehensive protection device in the instrument room, and the UPS power supply circuit is arranged in the instrument room. The temperature control assembly comprises an air switch, a heater contactor, a heater, a fan, a temperature and humidity sensor, a temperature and humidity controller and a fan, the UPS power supply circuit is connected into the air switch, and the output end of the air switch is connected with a contactor power terminal and a temperature and humidity controller power terminal. A control output end of the temperature and humidity controller is connected with a coil of the contactor and a fan power supply end, a normally open contact of the contactor is connected to a power supply input end of the heater, and a signal line of the temperature and humidity sensor is connected to an IO port of the temperature and humidity controller; according to the utility model, temperature and humidity compensation can be carried out on the comprehensive protection device, and accident hidden dangers caused by frequent restart are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy generation, supply and distribution, and in particular to a comprehensive temperature compensation device. Background Art

[0002] After the ambient temperature of the power area substation comprehensive protection device reaches -4℃, the comprehensive protection device frequently interrupts and restarts. According to the statistics of the distribution switches put into operation, the maximum annual restart number of the comprehensive protection device is 21 times, and the minimum annual restart number is 12 times. The frequent interruption and restart of the device will lead to inaccurate measurement. If a short circuit fault occurs during the interruption and restart, the protection function of the comprehensive protection device will fail, causing over-level tripping, that is, the primary and secondary switches of the main transformer trip, which expands the scope of the accident and brings serious consequences. The temperature of the comprehensive protection device in the instrument room of the central high-voltage switch cabinet is too low to meet the standard. The standard temperature is 20℃, which affects the operation of the internal electronic components. The actual operating temperature in winter is -23℃~-2℃. The low temperature leads to frequent interruptions and restarts of the device. The temperature and humidity of the local position in the high-voltage switch cabinet, that is, the instrument room, should meet the standard, so that the internal electronic components can operate in the optimal temperature and humidity environment, realize precise temperature and humidity control, and avoid frequent restarts.

[0003] The high-voltage room is large, and the temperature in the high-voltage room is between -23℃ and -2℃ from December to February in winter. The secondary busbar bridge of the main transformer, the hoisting hole of the GIS room on the third floor, the door of the hoisting passage, and the ventilation fan hole are all connected to the outdoors. Although the operation area has been sealed against cold, and indoor air conditioners and heaters have been installed to increase the ambient temperature, the heating effect is limited in winter when the temperature is low. How to increase the temperature of the comprehensive protection device itself, make the local temperature of the instrument room meet the standard, and avoid frequent restarts of the protection device has become a difficult problem facing power workers. Summary of the invention

[0004] The utility model provides a comprehensive protection temperature compensation device, which enables the electronic components in the comprehensive protection device in the instrument room of the high-voltage cabinet to operate in an optimal temperature and humidity environment, realizes precise temperature control, avoids frequent restart of the comprehensive protection device, and uses a UPS power supply circuit to avoid power failure without being discovered, resulting in the stop of temperature and humidity control, thereby causing frequent interruption and restart of the comprehensive protection device, thereby ensuring the temperature and humidity in the instrument room.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A comprehensive protection temperature compensation device, comprising a high-voltage cabinet, an instrument room and a comprehensive protection device, wherein the comprehensive protection device is arranged in the instrument room, the instrument room is arranged in the high-voltage cabinet, and further comprising a temperature control component and a UPS power supply circuit, wherein the UPS power supply circuit is connected to the temperature control component, and the temperature control component is arranged beside the comprehensive protection device in the instrument room;

[0007] The temperature control component includes an air switch, a heater contactor, a heater, a fan, a temperature and humidity sensor, a temperature and humidity controller and a fan. The UPS power supply circuit is connected to the air switch, the output end of the air switch is connected to the contactor power terminal and the temperature and humidity controller power terminal, the control output end of the temperature and humidity controller is connected to the contactor coil and the fan power end, the contactor normally open contact is connected to the heater power input end, and the temperature and humidity sensor signal line is connected to the IO port of the temperature and humidity controller.

[0008] Furthermore, the high-voltage cabinet comprises a front end and a rear end of the high-voltage cabinet, the instrument room is arranged at the front end of the high-voltage cabinet, and the front end and the rear end of the high-voltage cabinet are both provided with louver vents.

[0009] Furthermore, the probe of the temperature and humidity sensor is arranged on the housing of the comprehensive protection device.

[0010] Furthermore, the heating power of the heater is 150-300W.

[0011] Furthermore, the connecting wire connecting the normally open contact of the contactor to the power input terminal of the heater is a flame-retardant BVR wire, and a high-temperature resistant wax tube is used as a threading tube on the outside.

[0012] Furthermore, the fan is arranged on the top of the instrument room.

[0013] Furthermore, the UPS power supply circuit includes a UPS, a UPS input air switch and a dual power supply mutual switching circuit, wherein the dual power supply mutual switching circuit is connected to the UPS input air switch, and the UPS input air switch is connected to the UPS.

[0014] Furthermore, it also includes a fan box. When there are multiple fans, the fans are arranged in the fan box, and the fan box is arranged on the top of the instrument room.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1) It can compensate the temperature and humidity of the comprehensive protection device so that it can work within the standard temperature range throughout the year, avoiding potential accidents caused by frequent restarts;

[0017] 2) This device has a humidity monitoring function and can control the fan to adjust the temperature and humidity;

[0018] 3) The device has a simple structure and can be modified on the basis of the original system. The modification is small, easy to implement and promote, and reduces the accident cost caused by frequent restarts;

[0019] 4) Use AC control circuit, which is distinguished from DC circuits such as the operating power supply, control power supply, and protection device power supply of the substation. It can be installed at any time after taking safety measures, without stopping the high-voltage circuit breaker and affecting the operation of the high-voltage circuit breaker;

[0020] 5) Use UPS power supply circuit to avoid power failure without detection, resulting in the cessation of temperature and humidity control, which will lead to frequent interruption and restart of the comprehensive protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly structure of the utility model.

[0022] Figure 2 It is a wiring diagram of the temperature control component of the utility model.

[0023] Figure 3 The utility model is a UPS power supply circuit wiring diagram.

[0024] In the figure: 1. High-voltage cabinet 2. Temperature control components 3. Comprehensive protection device 4. Instrument room 5. Louver vents at the front end of the high-voltage cabinet 6. Front end of the high-voltage cabinet 7. Rear end of the high-voltage cabinet 8. Upper louver vents at the rear end of the high-voltage cabinet 9. Lower louver vents at the rear end of the high-voltage cabinet 10. Air switch for power supply A 11. Air switch for power supply B 12. Normally closed contacts of intermediate relay 13. Coil of power supply contactor B 14. Normally closed contacts of power supply contactor A 15. Power indicator light for power supply B 16. Normally open contacts of power supply contactor B 1 7. Main contact of power contactor of line b 18. UPS input air switch 19. UPS 20. Air switch 21. Heater contactor 22. Heater 23. Fan box 24. Fan 25. Temperature and humidity controller 26. Temperature and humidity sensor 27. Power indicator light of line a 28. Normally open contact of power contactor of line a 29. Normally open contact of intermediate relay 30. Coil of power contactor of line a 31. Normally closed contact of power contactor of line b 32. Coil of intermediate relay 33. Main contact of power contactor of line a DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0026] See Figure 1 , is an assembly diagram of the utility model. The utility model is a comprehensive protection temperature compensation device, comprising a high-voltage cabinet 1, an instrument room 4, a comprehensive protection device 3, a temperature control component 2 and a UPS power supply circuit, wherein the comprehensive protection device 3 is arranged in the instrument room 4, the instrument room 4 is arranged in the high-voltage cabinet 1, the UPS power supply circuit is connected to the temperature control component 2, the temperature control component 2 is arranged next to the comprehensive protection device 3 in the instrument room 4, the high-voltage cabinet 1 comprises a high-voltage cabinet front end 6 and a high-voltage cabinet rear end 7, the instrument room 4 is arranged at the high-voltage cabinet front end 6, the high-voltage cabinet front end louver vent 5 is arranged at the bottom of the high-voltage cabinet front end 6, the high-voltage cabinet rear end 7 is provided with a high-voltage cabinet rear end lower louver vent 9, and the high-voltage cabinet rear end 7 is provided with a high-voltage cabinet rear end upper louver vent 8 at the top;

[0027] See Figure 2 The temperature control component 2 includes an air switch 20, a heater contactor 21, a heater 22, a fan 24, a temperature and humidity sensor 26, a temperature and humidity controller 25 and a fan 24. There are three fans 24, which are arranged in a fan box 23, and the fan box 23 is arranged on the top of the instrument room 4; the UPS power supply circuit is connected to the air switch 20, the output end of the air switch 20 is connected to the power terminal of the heater contactor 21 and the power terminal of the temperature and humidity controller 25, the control output end of the temperature and humidity controller 25 is connected to the coil of the heater contactor 21 and the power end of the fan 24, the normally open contact of the heater contactor 21 is connected to the power input end of the heater 22, the heating power of the heater 22 is 200W, the connecting line of the normally open contact of the heater contactor 21 connecting the power input end of the heater 22 is a flame-retardant BVR line, and a high-temperature wax tube is used as a threading tube on the outside, the signal line of the temperature and humidity sensor 26 is connected to the IO port of the temperature and humidity controller 25, and the probe of the temperature and humidity sensor 26 is arranged on the shell of the comprehensive protection device 3.

[0028] See Figure 3 The UPS power supply circuit includes UPS19, UPS input air switch 18 and dual power supply mutual switching circuit. The dual power supply mutual switching circuit includes dual power supply mutual switching switch, intermediate relay, UPS power supply contactor and indicator light. Two AC power supplies 220V are respectively connected to the a-way power supply air switch 10 and the b-way power supply air switch 11 of the dual power supply mutual switching switch. The output end of the a-way power supply air switch 10 is connected to the a-way power supply contactor main contact 33 and the intermediate relay coil 32 and the intermediate relay normally open contact 29. The intermediate relay normally open contact 29 is connected in series with the a-way power supply contactor coil 30 and the b-way power supply contactor normally closed contact 31, and the a-way power supply contactor coil 30 and the b-way power supply contactor normally closed contact Point 31 is connected in parallel with the a-way power indicator light 27 and the a-way power contactor normally open contact 28; the output end of the b-way power air switch 11 is connected to the b-way power contactor main contact 17 and the intermediate relay normally closed contact 12, the intermediate relay normally closed contact 12 is connected in series with the b-way power contactor coil 13 and the a-way power contactor normally closed contact 14, and the b-way power indicator light 15 and the b-way power contactor normally open contact 16 are connected in parallel with the b-way power contactor coil 13 and the a-way power contactor normally closed contact 14, the a-way power main contactor contact 33 and the b-way power main contactor contact 17 are connected in parallel to the input end of the UPS input air switch 18, and the outlet of the UPS input air switch 18 is connected to the UPS19 power terminal.

[0029] Working principle: The device is installed next to the comprehensive protection device 3 in the secondary wiring compartment of the instrument room 4 at the front end of the high-voltage switch cabinet, providing temperature compensation for the comprehensive protection device 3. The air switch 10 for the a-way power supply and the air switch 11 for the b-way power supply of the dual power supply mutual casting circuit, as well as the UPS input air switch 18 and air switch 20 of the temperature control component 2 are all 5A switches, and the working state is normally closed, supplying power to the temperature and humidity controller 25. The heater 22 is explosion-proof, the connecting wire is a flame-retardant 2.5 flat BVR wire, and a high-temperature wax tube is used as the threading tube. The probe of the temperature and humidity sensor 26 is attached On the housing of the comprehensive protection device 3, the temperature of the comprehensive protection device 3 and the humidity in the instrument room 4 are detected. When the sensor detects that the temperature is lower than -2°C, the temperature and humidity controller 25 is activated, the contacts of the heater contactor 21 are closed, and the heater 22 is powered on and starts to heat up. When the temperature reaches 20°C, the thermostat is activated, the contacts of the heater contactor 21 are separated, the heater 22 stops heating, and the fan 24 is linked to adjust the humidity so that the humidity is not more than 90% of the normal indoor humidity. When the humidity is high, the temperature and humidity controller 25 outputs a control signal to start the fan 24, and the fan 24 rotates to reduce the humidity in the instrument room 4.

[0030] During normal operation, the air switch 10 of the power supply on line A works, and the air switch 11 of the power supply on line B also works to use its power supply as a backup power supply. The intermediate relay coil 32 is energized, the normally open contact 29 of the intermediate relay is closed, the normally closed contact 12 of the intermediate relay is opened, the working indicator light 27 of the power supply on line A is on, the indicator light 15 of the power supply on line B is off, the contactor coil 30 of the power supply on line A is energized, the contactor coil 13 of the power supply on line B is not energized, and the main contact 33 of the power supply contactor on line A is closed to supply power to the UPS.

[0031] When a power outage occurs at the air switch 10 end of the a power supply, the b backup power supply works, the intermediate relay coil 32 loses power, the normally closed contact 12 of the intermediate relay closes, the normally open contact 29 of the intermediate relay opens, the b power contactor coil 13 is energized, the normally open contact 16 of the b power contactor closes, the b power indicator light 15 lights up, the main contact 17 of the b power contactor closes, and power is supplied to UPS19, the a power contactor coil 30 loses power, the a power contactor normally open contact 28 opens, the a power indicator light 27 goes out, the a power contactor coil 30 and the b power contactor coil 13 add the b power contactor normally closed contact 31 and the a power contactor normally closed contact 14 interlocking, improve the power supply reliability, adopt dual power supply mutual power supply and UPS19 power access to continuously power the temperature control component 2, avoid the temperature and humidity control being stopped due to power failure without being discovered, thereby causing frequent interruption and restart of the comprehensive protection device 3.

[0032] Let the electronic components in the comprehensive protection device 3 work within the standard temperature and humidity range to achieve the best use effect, so that the protection device can operate stably and reliably, and avoid possible hidden dangers of accidents. "Accidents are the biggest cost". Avoiding accidents means reducing costs and creating benefits. Take the total reduction of thick plates as an example: if the protection device is interrupted and restarted, causing the switch to trip, the main rolling mill motor on site will stop, affecting the operation time of the steel rolling equipment for 3 hours. When the average daily output of thick plate is 6,000 tons, the profit per ton is 200 yuan / ton, and the economic benefit = 6,000 tons ÷ 24 hours × 3 hours × 200 yuan / ton × 17 times (annual average number of device restarts) = 2.55 million yuan / year, that is, the annual benefit is 2.55 million yuan.

[0033] The above embodiments are implemented based on the technical solution of the utility model, and detailed implementation methods and specific operation processes are given, but the protection scope of the utility model is not limited to the above embodiments. The methods used in the above embodiments are conventional methods unless otherwise specified.

Claims

1. A comprehensive protection temperature compensation device, comprising a high-voltage cabinet, an instrument room and a comprehensive protection device, wherein the comprehensive protection device is arranged in the instrument room, and the instrument room is arranged in the high-voltage cabinet, characterized in that: It also includes a temperature control component and a UPS power supply circuit, wherein the UPS power supply circuit is connected to the temperature control component, and the temperature control component is arranged next to the comprehensive protection device in the instrument room; The temperature control component includes an air switch, a heater contactor, a heater, a fan, a temperature and humidity sensor, a temperature and humidity controller and a fan. The UPS power supply circuit is connected to the air switch, the output end of the air switch is connected to the contactor power terminal and the temperature and humidity controller power terminal, the control output end of the temperature and humidity controller is connected to the contactor coil and the fan power end, the contactor normally open contact is connected to the heater power input end, and the temperature and humidity sensor signal line is connected to the IO port of the temperature and humidity controller.

2. A comprehensive insulation temperature compensation device according to claim 1, characterized in that: The high-voltage cabinet comprises a front end and a rear end of the high-voltage cabinet, the instrument room is arranged at the front end of the high-voltage cabinet, and the front end and the rear end of the high-voltage cabinet are both provided with louver vents.

3. A comprehensive insulation temperature compensation device according to claim 1, characterized in that: The probe of the temperature and humidity sensor is arranged on the housing of the comprehensive protection device.

4. A comprehensive insulation temperature compensation device according to claim 1, characterized in that: The heating power of the heater is 150-300W.

5. The comprehensive insulation temperature compensation device according to claim 1 is characterized in that: The connecting wire connecting the normally open contact of the contactor to the power input terminal of the heater is a flame-retardant BVR wire, and a high-temperature resistant wax tube is used as a threading tube on the outside.

6. A comprehensive insulation temperature compensation device according to claim 1, characterized in that: The fan is arranged on the top of the instrument room.

7. The comprehensive insulation temperature compensation device according to claim 1 is characterized in that: The UPS power supply circuit includes a UPS, a UPS input air switch and a dual power supply mutual-throwing circuit, wherein the dual power supply mutual-throwing circuit is connected to the UPS input air switch, and the UPS input air switch is connected to the UPS.

8. The comprehensive insulation temperature compensation device according to claim 1 is characterized in that: It also includes a fan box. When there are multiple fans, the fans are arranged in the fan box, and the fan box is arranged on the top of the instrument room.

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