CN101783482A - Intelligent temperature difference type condensation-preventing controller for switchgear and method thereof - Google Patents
Intelligent temperature difference type condensation-preventing controller for switchgear and method thereof Download PDFInfo
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- CN101783482A CN101783482A CN200910029037A CN200910029037A CN101783482A CN 101783482 A CN101783482 A CN 101783482A CN 200910029037 A CN200910029037 A CN 200910029037A CN 200910029037 A CN200910029037 A CN 200910029037A CN 101783482 A CN101783482 A CN 101783482A
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Abstract
The invention discloses an intelligent temperature difference type condensation-preventing controller for a switchgear, which comprises two switchgear inside temperature acquisition circuits, a switchgear outside temperature acquisition circuit, a switchgear inside humidity acquisition circuit, a microprocessor, an alarm and display circuit, a heating control circuit, an air exhaust control circuit, a 485 interface circuit and a power circuit. The intelligent temperature difference type condensation-preventing controller for the switchgear is mainly based on a condensation generating and preventing mechanism and does not adopt a traditional condensation sensor any more but adopts a method of adjusting temperature difference between the switchgear inside temperature and the switchgear outside temperature by using temperature sensors inside and outside the switchgear to allow the switchgear inside temperature to be 1 to 3 DEG C higher than the switchgear outside temperature all the time and allow the inside of the switchgear to have no condensation generating condition. Therefore, the controller has the function of preventing the inside of the switchgear from generating condensation. At the same time, a humidity sensor in the switchgear is adopted to measure and control the relative humidity in the switchgear, so the controller greatly improves condensation-preventing sensitivity of the switchgear and guarantees safe and reliable running of high-voltage equipment through the dual means.
Description
Technical field
The present invention relates to the inner anti-condensation controller of a kind of switch cubicle, to ensure the power equipment safety reliability service.
Background technology
China adopts automatic heating and dehumidification controller to prevent that condensation from having more than ten years history in switch cubicle, this heating and dehumidification controller is wet in moisture resistance, anti-condensation assurance high-tension apparatus reliability service has played positive role, but in use in the area that has some problems have appearred also, for example: at southern plum rain season, sometimes the air humidity of switch cubicle inside is higher, even local existing dewfall phenomenon in the cabinet, because the condensation sensing station that is installed in cabinet inside does not arrive the degree of condensation, perhaps the condensation transducer is subjected to dust and gas pickling in the air for a long time, the sensitivity of transducer is affected, the condensation controller can not start heater in time, cause the effect of condensation control malfunctioning, bring threat for the safe operation of switchgear.
Usually the condensation controller that adopts utilizes the condensation transducer to start or stop heater work automatically now, from its control mechanism, there are two defectives: the one, this condensation transducer is the passive-type motion device, when promptly must aerial vapour pressure saturated, just arrive dew point temperature at body surface, when taking place, condensation just can drive heating work, and it is anti-condensation as the anti-accident important measures of electric cabinet, restart heating near the edge of condensation and eliminate condensation, just lack a prevention process, from safety, angle is still far from being enough on reliability as an anti-accident measures reliably; The 2nd, if condensation transducer installation site is improper, characteristic changed after perhaps the surface of condensation transducer was subjected to the erosion of dust or gas, though the cabinet inner metal surface has the dewfall phenomenon, the condensation controller still can not in time start the heater input, also can have serious consequences.
For switch cubicle, the metalwork surface temperature drops to dew point temperature when following in the cabinet, and the metal surface can form the globule, and this phenomenon is called dewfall (or title condensation), whether dewfall depends on ambient temperature, and in-cabinet temperature and several variable quantity such as relative humidity, dew point temperature are determined.Dew point temperature is meant in the air of uniform temperature, the air that the maximum level of steam is called " saturated steam amount " this moment is called " saturated air ", and when saturation air temperature descends, airborne steam will condense into the globule, contain the saturation of the air temperature of steam, be called dew point temperature.The factor that forms dewfall in the switch cubicle easily mainly contains: (1) area surroundings humidity height, temperature Change is big, during cold and hot air exchange easily in the metal surface dewfall; (2) switch cubicle bottom is moist, even the cable trough that has has ponding, during water evaporation, when being lower than in the cabinet air themperature as metallic surface temperature, forms condensation in the metal surface; (3) equipment that has is in shut down condition, and in-cabinet temperature is lower than ambient temperature through regular meeting, causes that the metal surface has the globule to condense, and at this moment, in case switch cubicle puts into operation, accidents such as creepage, flashover takes place very easily.
Summary of the invention
Technical problem to be solved by this invention is to take place and prevention mechanism according to condensation, no longer adopt traditional condensation transducer, but utilize in the temperature sensor by-pass cock cabinet cabinet that cabinet is interior and cabinet is outer and temperature difference method outside the cabinet, make in-cabinet temperature all the time than outer the high 1-3 of temperature ℃ of cabinet, make and do not possess the condition that condensation takes place in the cabinet, play the inner effect that condensation takes place of prevention switch cubicle, in cabinet, adopt the relative humidity in humidity sensor measurement and the control switch cabinet simultaneously, two methods improves the anti-condensation sensitivity of switch cubicle greatly, guarantees the high-tension apparatus safe and reliable operation.
For solving the problems of the technologies described above, the invention provides a kind of intelligent temperature difference type condensation-preventing controller for switchgear, comprise that humidity Acquisition Circuit, microprocessor, warning and display circuit, heating control circuit, air draft control circuit, 485 interface circuits and power circuit are formed in 2 in-cabinet temperature Acquisition Circuit, the outer temperature collection circuit of cabinet, the cabinet.
The output of in-cabinet temperature Acquisition Circuit is connected with the A/D mouth of microprocessor, the output of the outer temperature collection circuit of cabinet is connected with the A/D port of microprocessor, humidity Acquisition Circuit output is connected with the A/D port of microprocessor in the cabinet, the input of warning and display circuit is connected with the I/O mouth of microprocessor, the input of heating control circuit is connected with the I/O mouth of microprocessor, the input of air draft control circuit is connected with the I/O mouth of microprocessor, 485 interface circuits are connected with the serial ports of microprocessor, power circuit respectively with the in-cabinet temperature Acquisition Circuit, the outer temperature collection circuit of cabinet, humidity Acquisition Circuit in the cabinet, microprocessor, report to the police and display circuit, heating control circuit is connected with the air draft control circuit, for they provide power supply.
The present invention has positive effect: (1) intelligent temperature difference type condensation-preventing controller for switchgear of the present invention, utilize in the temperature sensor by-pass cock cabinet cabinet that cabinet is interior and cabinet is outer and temperature difference method outside the cabinet, make in-cabinet temperature all the time than outer the high 1-3 of temperature ℃ of cabinet, make not possess the condition that condensation takes place in the cabinet, play the inner effect that condensation takes place of prevention switch cubicle.(2) intelligent temperature difference type condensation-preventing controller for switchgear of the present invention adopts the relative humidity in humidity sensor measurement and the control switch cabinet in cabinet, replace the mode that tide is driven in long-term heating, has obviously energy-conservation effect.
Description of drawings
Fig. 1 is the intelligent temperature difference type condensation-preventing controller for switchgear structure principle chart of embodiment 1.
Embodiment
See shown in Figure 1, the intelligent temperature difference type condensation-preventing controller for switchgear of present embodiment comprises that humidity Acquisition Circuit, microprocessor, warning and display circuit, heating control circuit, air draft control circuit, 485 interface circuits and power circuit are formed in 2 in-cabinet temperature Acquisition Circuit, the outer temperature collection circuit of cabinet, the cabinet.
The outer temperature collection circuit of in-cabinet temperature Acquisition Circuit and cabinet all can adopt thermistor (10K Ω for example, 35K Ω), also can adopt digital temperature sensor (for example AD590, LM92), gather the switch cubicle internal and external temperature, according to the switch cubicle inside and outside temperature difference, control heater and fan work prevent to occur in the switch cubicle condensation, temperature-measuring range and precision: 0-80 ℃ ± the %+1 word.
The humidity Acquisition Circuit adopts humidity sensor in the cabinet, hygrometric scope and precision: 20%-98%RH ± 5% in the cabinet.
Heating control circuit adopts relay (relay contact power requirement: 220VAC/5A), send the work of control signal control heater by the temperature and humidity value of microprocessor collection, heating starting condition (wherein each satisfy promptly to start heating): during the outer temperature of (1) in-cabinet temperature one cabinet≤1 ℃; (2) during humidity in the cabinet＞70%RH; (3) during in-cabinet temperature≤5 ℃; (4) hand-operated forced heating.Heating stop condition (satisfy simultaneously following condition promptly stop heating): during the outer temperature of (1) in-cabinet temperature one cabinet＞2 ℃; (2) during in-cabinet temperature＞13 ℃; (3) during humidity in the cabinet≤60%RH.
The air draft control circuit adopts relay, and (the relay contact power requirement: 220VAC/5A), the temperature value by the microprocessor collection sends the work of control signal control air ejector fan, high temperature air draft entry condition: during in-cabinet temperature＞50 ℃; High temperature air draft stop condition: during in-cabinet temperature＜45 ℃.
485 interface circuits adopt baud rate 4800, MODBUS agreement.
Power circuit is made up of reduction voltage circuit, rectification circuit, filter circuit and voltage stabilizing circuit, and the input voltage range of power circuit is 220V ± 15%.
Microprocessor is selected PIC, NSP430,51 or AVR series etc. for use.
Claims (2)
1. intelligent temperature difference type condensation-preventing controller for switchgear and method thereof, it is characterized in that, comprise that humidity Acquisition Circuit (4), microprocessor (5), warning and display circuit (6), heating control circuit (7), air draft control circuit (8), 485 interface circuits (9) and power circuit (10) are formed in in-cabinet temperature Acquisition Circuit (1), in-cabinet temperature Acquisition Circuit (2), the outer temperature collection circuit (3) of cabinet, the cabinet; The output of in-cabinet temperature Acquisition Circuit (1) is connected with the A/D mouth of microprocessor (5), the output of in-cabinet temperature Acquisition Circuit (2) is connected with the A/D port of microprocessor (5), the output of the outer temperature collection circuit (3) of cabinet is connected with the A/D port of microprocessor (5), humidity Acquisition Circuit (4) output is connected with the A/D port of microprocessor (5) in the cabinet, the input of warning and display circuit (6) is connected with the I/O mouth of microprocessor (5), the input of heating control circuit (7) is connected with the I/O mouth of microprocessor (5), the input of air draft control circuit (8) is connected with the I/O mouth of microprocessor (5), 485 interface circuits (9) are connected with the serial ports of microprocessor (5), power circuit (10) respectively with in-cabinet temperature Acquisition Circuit (1), in-cabinet temperature Acquisition Circuit (2), the outer temperature collection circuit (3) of cabinet, humidity Acquisition Circuit (4) in the cabinet, microprocessor (5), report to the police and display circuit (6), heating control circuit (7) is connected with air draft control circuit (8), for they provide power supply.
2. intelligent temperature difference type condensation-preventing controller for switchgear as claimed in claim 1 and method thereof, it is characterized in that, take place and prevention mechanism according to condensation, no longer adopt traditional condensation transducer, but utilize in the temperature sensor by-pass cock cabinet cabinet that cabinet is interior and cabinet is outer and temperature difference method outside the cabinet, make in-cabinet temperature all the time than outer the high 1-3 of temperature ℃ of cabinet, make and do not possess the condition that condensation takes place in the cabinet, play the inner effect that condensation takes place of prevention switch cubicle, adopt the relative humidity in humidity sensor measurement and the control switch cabinet simultaneously in cabinet, two methods prevents condensation.
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| CN200910029037A CN101783482B (en) | 2009-01-16 | 2009-01-16 | Intelligent temperature difference type condensation-preventing controller for switchgear |
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| CN200910029037A CN101783482B (en) | 2009-01-16 | 2009-01-16 | Intelligent temperature difference type condensation-preventing controller for switchgear |
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| CN101783482A true CN101783482A (en) | 2010-07-21 |
| CN101783482B CN101783482B (en) | 2012-09-05 |
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| CN102419607A (en) * | 2011-12-07 | 2012-04-18 | 诸暨市供电局 | Device for automatically controlling humidity in a cabinet |
| CN102478866A (en) * | 2010-11-29 | 2012-05-30 | 西安康瑞矿用设备有限公司 | Temperature and humidity controller used in high voltage equipment |
| CN102541108A (en) * | 2012-02-17 | 2012-07-04 | 苏州苏海亚电气有限公司 | Automatic humidification and dehumidification control device |
| CN102830737A (en) * | 2012-09-26 | 2012-12-19 | 中电装备恩翼帕瓦（山东）高压开关有限公司 | Automatic temperature regulating device for control cabinet |
| CN103944080A (en) * | 2014-05-04 | 2014-07-23 | 宁波穆勒电气有限公司 | Condensation-preventing switch cabinet and condensation-preventing method |
| CN103956661A (en) * | 2014-05-04 | 2014-07-30 | 宁波穆勒电气有限公司 | Switch cabinet and condensation preventing method |
| CN104298286A (en) * | 2014-10-30 | 2015-01-21 | 浙江群力电气有限公司 | Internal environment regulating and controlling system of switch cabinet |
| CN104298284A (en) * | 2014-09-23 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | Dehumidification device for high-tension switch cabinet |
| CN104460786A (en) * | 2014-10-31 | 2015-03-25 | 苏州佑瑞检测技术有限公司 | Switch cabinet condensate monitoring and processing method |
| CN104682222A (en) * | 2013-11-29 | 2015-06-03 | 国家电网公司 | Solar condensation preventing device for switch cabinet |
| CN104766542A (en) * | 2015-03-30 | 2015-07-08 | 苏州佳世达电通有限公司 | Display device |
| CN106765841A (en) * | 2016-12-01 | 2017-05-31 | 无锡赛孚电力环境控制设备有限公司 | A kind of electrical house temperature and humidity control anti-condensation system with cable duct |
| CN106843327A (en) * | 2015-12-07 | 2017-06-13 | 常州常工电子科技股份有限公司 | Anti-condensation control device in working state of circuit breaker instruction and cabinet |
| CN107204583A (en) * | 2017-05-19 | 2017-09-26 | 合肥尚强电气科技有限公司 | Anti-freezing switch cabinet |
| US9901015B2 (en) | 2015-03-27 | 2018-02-20 | Qisda (Suzhou) Co., Ltd. | Display device |
| CN107860738A (en) * | 2017-12-26 | 2018-03-30 | 吉林大学 | A kind of infrared CO of facilities horticulture with intelligent dehumidification function2Sensor and method |
| CN108075378A (en) * | 2018-01-11 | 2018-05-25 | 重庆市东泰电器实业有限公司 | A kind of anti-dewing compensation cabinet and compensating cabinet |
| CN108131755A (en) * | 2017-12-14 | 2018-06-08 | 国家电网公司 | A kind of electrical equipment component cabinet humiture cooperative control method |
| CN111103911A (en) * | 2019-12-06 | 2020-05-05 | 珠海格力电器股份有限公司 | Heat dissipation device for mobile equipment and control method thereof |
| CN112242656A (en) * | 2019-07-17 | 2021-01-19 | 江苏瀚晨电气科技有限公司 | Ring main unit capable of automatically controlling refrigerating air |
| CN117878735A (en) * | 2024-03-12 | 2024-04-12 | 长沙普洛电气设备有限公司 | Condensation prevention method, system, terminal and storage medium for electric control cabinet |
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| CN2559137Y (en) * | 2002-03-25 | 2003-07-02 | 贾敬军 | Heating dehumidifier for high-voltage electric appliance switch cubicle |
| DE102005005588B4 (en) * | 2005-02-07 | 2008-03-13 | Knürr AG | switch cabinet |
| CN2935564Y (en) * | 2006-08-17 | 2007-08-15 | 江苏东源电器集团股份有限公司 | Miniature dehumidification device for switch cabinet |
| CN201312068Y (en) * | 2008-11-20 | 2009-09-16 | 常州帕斯菲克自动化技术有限公司 | Switch cabinet intelligent temperature difference type anti condensation controller |
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| CN102478866A (en) * | 2010-11-29 | 2012-05-30 | 西安康瑞矿用设备有限公司 | Temperature and humidity controller used in high voltage equipment |
| CN102419607A (en) * | 2011-12-07 | 2012-04-18 | 诸暨市供电局 | Device for automatically controlling humidity in a cabinet |
| CN102541108A (en) * | 2012-02-17 | 2012-07-04 | 苏州苏海亚电气有限公司 | Automatic humidification and dehumidification control device |
| CN102830737A (en) * | 2012-09-26 | 2012-12-19 | 中电装备恩翼帕瓦（山东）高压开关有限公司 | Automatic temperature regulating device for control cabinet |
| CN104682222A (en) * | 2013-11-29 | 2015-06-03 | 国家电网公司 | Solar condensation preventing device for switch cabinet |
| CN103956661A (en) * | 2014-05-04 | 2014-07-30 | 宁波穆勒电气有限公司 | Switch cabinet and condensation preventing method |
| CN103956661B (en) * | 2014-05-04 | 2016-02-17 | 宁波懿德电气有限公司 | A kind of switch cubicle and dewing-proof method |
| CN103944080A (en) * | 2014-05-04 | 2014-07-23 | 宁波穆勒电气有限公司 | Condensation-preventing switch cabinet and condensation-preventing method |
| CN104298284A (en) * | 2014-09-23 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | Dehumidification device for high-tension switch cabinet |
| CN104298286A (en) * | 2014-10-30 | 2015-01-21 | 浙江群力电气有限公司 | Internal environment regulating and controlling system of switch cabinet |
| CN104460786A (en) * | 2014-10-31 | 2015-03-25 | 苏州佑瑞检测技术有限公司 | Switch cabinet condensate monitoring and processing method |
| US9901015B2 (en) | 2015-03-27 | 2018-02-20 | Qisda (Suzhou) Co., Ltd. | Display device |
| CN104766542A (en) * | 2015-03-30 | 2015-07-08 | 苏州佳世达电通有限公司 | Display device |
| CN106843327A (en) * | 2015-12-07 | 2017-06-13 | 常州常工电子科技股份有限公司 | Anti-condensation control device in working state of circuit breaker instruction and cabinet |
| CN106765841A (en) * | 2016-12-01 | 2017-05-31 | 无锡赛孚电力环境控制设备有限公司 | A kind of electrical house temperature and humidity control anti-condensation system with cable duct |
| CN107204583A (en) * | 2017-05-19 | 2017-09-26 | 合肥尚强电气科技有限公司 | Anti-freezing switch cabinet |
| CN108131755A (en) * | 2017-12-14 | 2018-06-08 | 国家电网公司 | A kind of electrical equipment component cabinet humiture cooperative control method |
| CN108131755B (en) * | 2017-12-14 | 2019-12-31 | 国家电网公司 | Temperature and humidity cooperative control method for electrical equipment assembly cabinet |
| CN107860738A (en) * | 2017-12-26 | 2018-03-30 | 吉林大学 | A kind of infrared CO of facilities horticulture with intelligent dehumidification function2Sensor and method |
| CN108075378A (en) * | 2018-01-11 | 2018-05-25 | 重庆市东泰电器实业有限公司 | A kind of anti-dewing compensation cabinet and compensating cabinet |
| CN108075378B (en) * | 2018-01-11 | 2020-06-30 | 重庆市东泰电器实业有限公司 | Anti-condensation compensation cabinet body and compensation cabinet |
| CN112242656A (en) * | 2019-07-17 | 2021-01-19 | 江苏瀚晨电气科技有限公司 | Ring main unit capable of automatically controlling refrigerating air |
| CN112242656B (en) * | 2019-07-17 | 2022-05-27 | 江苏瀚晨电气科技有限公司 | Ring main unit capable of automatically controlling refrigeration air |
| CN111103911A (en) * | 2019-12-06 | 2020-05-05 | 珠海格力电器股份有限公司 | Heat dissipation device for mobile equipment and control method thereof |
| CN111103911B (en) * | 2019-12-06 | 2021-11-05 | 珠海格力电器股份有限公司 | Heat dissipation device for mobile equipment and control method thereof |
| CN117878735A (en) * | 2024-03-12 | 2024-04-12 | 长沙普洛电气设备有限公司 | Condensation prevention method, system, terminal and storage medium for electric control cabinet |
| CN117878735B (en) * | 2024-03-12 | 2024-05-28 | 长沙普洛电气设备有限公司 | Condensation prevention method, system, terminal and storage medium for electric control cabinet |
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Owner name: CHANGZHOU PAZ FICK AUTOMATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHANGZHOU PACIFIC AUTOMATIC TECHNOLOGY CO., LTD. |
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Address after: 213022 B2, north of innovation and technology building, Xinbei District, Jiangsu, Changzhou Patentee after: Changzhou Paz Fick Automation Technology Co., Ltd. Address before: 213022 B2, north of innovation and technology building, Xinbei District, Jiangsu, Changzhou Patentee before: Changzhou Pasifeike Automation Technology Co., Ltd. |