CN105676920A - Condensation elimination system of intelligent ring main unit - Google Patents
Condensation elimination system of intelligent ring main unit Download PDFInfo
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- CN105676920A CN105676920A CN201610012409.4A CN201610012409A CN105676920A CN 105676920 A CN105676920 A CN 105676920A CN 201610012409 A CN201610012409 A CN 201610012409A CN 105676920 A CN105676920 A CN 105676920A
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- humidity
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a condensation elimination system of an intelligent ring main unit. The system comprises an acquisition unit used for acquiring a temperature value and a humidity value inside the ring main unit; a judging unit used for receiving the temperature value and the humidity value, and controlling a control unit to conduct the condensation elimination operation according to the relation between the temperature value and at least one predetermined temperature threshold, and the relation between the humidity value and at least one predetermined humidity threshold.
Description
Technical field
The present invention relates to field of intelligent control, be specifically related to a kind of intelligent ring main unit condensation and eliminate system.
Background technology
Intelligent ring main unit is in running, and the impact such as be subject to subsoil water counter tide, the smooth and base plate closure of ventilating is not tight, in cabinet, dew condensation phenomenon is serious. It is aging that high humility not only can accelerate insulant, it is easy to causes insulation flashover, also can accelerate the corrosion of machine components, affects the reliability of mechanism, and condensation also can cause the short circuit of secondary device in intelligent ring main unit, causes signal wrong report or switch misoperation.
Existing elimination 10kV intelligent ring main unit condensation technology has:
(1) civil engineering is carried out water-proofing treatment. The installing of ring main unit around has certain civil engineering, and such as ring main unit base, cable duct etc., at civil engineering surface painting waterproof layer, in minimizing ring main unit, the source of steam, reduces air humidity in ring main unit;
(2) ring main unit base plate is carried out encapsulation process. Do encapsulation process at base plate, it is possible to block the circulation from cable duct steam, reduce air humidity in ring main unit;
(3) strengthening the walkaround inspection to cable run, technical staff can grasp the condensation situation of ring main unit as early as possible, makes respective handling in time.
(4) design temperature and humidity controller, in order to eliminate the condensation problem in 10kV intelligent ring main unit. Operation principle is substantially: in the standby state, ambient relative humidity and variations in temperature are detected by sensor, the energy turn on automatically load when humidity occurring or being about to condensation, heated by external load or ventilate, until condensation no longer produces, system is again in the monitoring state, so repeatedly realizes automatically controlling.
But civil engineering is carried out water-proofing treatment or ring main unit base plate is carried out encapsulation process, can only the source of blocking part steam, it is impossible to thoroughly solve condensation problem; Strengthen the walkaround inspection to cable run, can expend substantial amounts of human and material resources, and the condensation problem of intelligent ring main unit can not be found in real time, even if finding there is condensation problem, also can only process by passive carrying out, and now equipment has been caused a degree of infringement by condensation; Existing temperature and humidity controller is divided into two types, and a kind of is air draft class, and namely when intelligent ring main unit interior humidity reaches threshold value, controller starts exhaust fan, reduces cabinet humidity, reaches to eliminate condensation effect; Another kind of for heating class, namely when intelligent ring main unit humidity (or temperature) reaches threshold value, heater starting, reduces cabinet humidity, reaches to eliminate condensation effect.The shortcoming of these two kinds of temperature and humidity controllers is judgment basis is temperature or humidity, although can reach to eliminate the purpose of condensation, but ignore the combined effect damage to ring main unit of temperature, humidity.
Summary of the invention
To be solved by this invention is existing except the problem that dew mode ignores temperature, equipment is caused damage by the combined effect of humidity.
In view of this, the present invention provides a kind of intelligent ring main unit condensation to eliminate system, including collecting unit, judging unit and performance element;
Described collecting unit is used for the temperature value and the humidity value that gather in described ring main unit; Described judging unit is used for receiving described temperature value and humidity value, and carries out removing dew action according to the relation of described temperature value and at least one preset temperature threshold value and the relation described performance element of control of described humidity value and at least one default humidity threshold.
Further, described preset temperature threshold value and default humidity threshold all have multiple, and plurality of preset temperature threshold value can divide multiple different temperature range, each at least 1 humidity threshold of temperature range correspondence.
Further, first described judging unit determines the temperature range residing for described temperature value, after determining temperature range, it is judged that the relation of described humidity value and at least 1 humidity threshold corresponding to the temperature range determined, and control described performance element according to judged result and carry out removing dew action.
Further, humidity value that described judging unit comparison is current and the first humidity threshold corresponding to the temperature range determined, when described humidity value is more than described first humidity threshold, control described performance element to start to remove dew, until when humidity value is less than the second humidity threshold corresponding to the temperature range determined, controlling described performance element and stop except dew.
Further, described performance element is heater, is arranged on the inwall of described ring main unit.
Further, described performance element is exhaust fan, is arranged on sidewall or the roof of described ring main unit.
Intelligent ring main unit condensation provided by the invention eliminates system and utilizes signal gathering unit that the temperature in ring main unit and humidity value are acquired, judging unit judges the relation of the actual temperature value relation with at least one preset temperature threshold value and actual humidity value and at least one default humidity threshold, so that it is determined that the poised state of temperature and humidity, control performance element according to poised state to carry out removing dew action, native system considers the combined effect of temperature and humidity simultaneously, thus can reduce the condensation damage to ring main unit.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below according to specific embodiments of the invention and in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is that the intelligent ring main unit that embodiment provides eliminates condensation system structure schematic diagram;
Fig. 2 is rate of metal corrosion and relative air humidity curve chart;
Fig. 3 is rate of metal corrosion and air themperature graph of relation;
Fig. 4 is the control strategy schematic diagram that the intelligent ring main unit that embodiment provides eliminates condensation system.
Detailed description of the invention
As it is shown in figure 1, the present embodiment provides a kind of intelligent ring main unit condensation to eliminate system, including: collecting unit 12, judging unit 13 and performance element 14.
Wherein collecting unit 12 is arranged in ring main unit 11, is used for the temperature value and the humidity value that gather in ring main unit 11, and collecting unit 12 can include temperature sensor and humidity sensor. For ensureing the normal enforcement of control strategy, it is desirable to temperature temperature measurement error absolute value is less than being not more than 1 DEG C, and relative humidity measurement Error Absolute Value is not more than 5%RH.Environment residing for intelligent ring main unit, in cabinet, very easily condensation and dew condensation phenomenon are serious, and temperature sensor is for gathering the temperature value in tested device, and humidity sensor is for gathering the humidity value in tested device.
Judging unit 13 is used for receiving temperature value and humidity value, and the relation according to the temperature value relation with at least one preset temperature threshold value and humidity value and at least one default humidity threshold, and control performance element 14 carries out action. Such as, preset temperature threshold value can be 0 DEG C, 15 DEG C, 30 DEG C etc., default humidity threshold can be 70%RH (relative humidity), 80%RH, 90%RH etc., can be specifically the humidity value when collecting unit 12 collects and when temperature value is all higher than certain predetermined threshold value, judging unit 13 just controls performance element 14 and carries out removing dew action, above-mentioned control mode is simply to illustrate that example of the present invention, it will be appreciated by those skilled in the art that, equilibrium relation according to temperature Yu humidity, it is possible to formulate more complicated control mode. During practical application, the power supply that can use ring main unit is that judging unit is powered, owing to 24V DC source can only be provided in intelligent ring main unit, therefore it is depressured to 5V firstly the need of by 24V DC voltage, owing to control strategy amount of calculation is little, therefore, use 51 single-chip microcomputers (such as existing STC89C52RC single-chip microcomputer) of 8 as judging unit. When epidemic disaster reaches the threshold value set, single-chip microcomputer pin sends control command, makes relay close, and starts performance element, starts to remove condensation.
Performance element 14 is concrete except dew action for performing, and performance element can be heater or exhaust fan, is arranged on the sidewall of tested device or on roof. When judging unit 13 sends order, performance element 14 correspondence is switched to operation or halted state.
Performance element 14 in the present embodiment preferably employs exhaust fan, by accelerating to strengthen the mode of ring main unit 11 inner air flow, reduce cabinet humidity, solve heater mode except the tested device surface sweating impact that condensation is caused acceleration insulator arrangement aging and tested device inside and outside temperature difference causes is except the problem of dew effect.
As one preferred embodiment, preset temperature threshold value and default humidity threshold all can have multiple, and plurality of preset temperature threshold value can divide multiple different temperature range, each at least 1 humidity threshold of temperature range correspondence. Such as 0 DEG C-15 DEG C corresponding humidity 85%RH of temperature, 15 DEG C of-20 DEG C of corresponding humidity 80%RH of temperature, owing to when temperature is higher, corrosion of metal impact can be strengthened by humidity; When temperature is relatively low, corrosion of metal impact can be weakened by humidity, so can formulate different default humidity threshold for different preset temperature threshold scopes, thus can strengthen except dew effect, and reduce consumption.
Further, first judging unit 13 can determine the temperature range residing for current temperature value, after determining temperature range, it is judged that the relation of current humidity value and at least 1 humidity threshold corresponding to the temperature range determined, and control performance element according to judged result and carry out removing dew action. assume that Current Temperatures is 10 DEG C, current humidity is 80%RH, known Current Temperatures is within the scope of 0 DEG C-15 DEG C, therefore comparison current humidity and humidity threshold 85%RH are wanted, and carry out removing dew action according to comparison result control performance element, humidity threshold corresponding within the scope of same temperature is not limited to 1, it is also feasible for arranging more humidity threshold, multiple humidity threshold can respectively as the entry condition of performance element, stop condition, or judging unit can adjust the power (except dew intensity) of performance element for different humidity threshold, to optimize except dew effect.
Fig. 2 is rate of metal corrosion and relative air humidity curve chart. By the formation condition of condensation it can be seen that when condensation body surface is identical with air themperature, air humidity, lower than saturated humidity, namely keeps air humidity lower than 100%RH (relative humidity), and dew condensation phenomenon would not occur. Can be obtained by Fig. 2: when relative humidity is lower than 35%, metal erosion is faint; When relative humidity is higher than 35% and during lower than 70%, rate of metal corrosion is less; When relative humidity is higher than 70%, rate of metal corrosion rises to rapidly. When relative humidity is very low, corrosion is very slow, and relative humidity is gradually increased, and when reaching certain limit, the speed of corrosion flies up, and the numerical value of this relative humidity is called critical relative humidity. When relative humidity is lower than critical humidity, no matter being what temperature, metal corrodes hardly. Can being obtained by Fig. 3, when more than critical humidity, metal has corrosion to relative humidity, temperature often raises 10 DEG C, and the speed of corrosion brings up to about 2 times, and when temperature is lower than 0 DEG C, corrosion rate is non-normally low, and when temperature is higher than 15 DEG C, corrosion rate is unprecedented soaring.
If the air humidity threshold of control circuit is decided to be 70%RH, can be greatly increased except the burden of condensation device, shorten its service life, consume a large amount of electric energy, cause unnecessary waste. Therefore, comprehensively except the economy of condensation, etch-proof effect and device, and considering certain safety threshold, the curve chart in conjunction with Fig. 2, Fig. 3 makes control strategy as shown in Figure 4:
(1), when temperature is lower than the first preset temperature, when humidity presets humidity more than first, performance element runs; In identical preset temperature range, when humidity presets humidity lower than second, performance element stops. Preferably, the first preset temperature preferably 0 DEG C, first presets the preferred 90%RH of humidity, and second presets the preferred 80%RH of humidity.
(2) when temperature is higher than the first preset temperature, lower than the second preset temperature, when humidity presets humidity more than the 3rd, performance element runs; In identical preset temperature range, when humidity presets humidity lower than the 4th, performance element stops.
Preferably, the first preset temperature preferably 0 DEG C, the second preset temperature preferably 15 DEG C, the 3rd presets the preferred 85%RH of humidity, and the 4th presets the preferred 78%RH of humidity;
(3) when temperature is higher than the second preset temperature, lower than the 3rd preset temperature, when humidity presets humidity more than the 5th, performance element runs; In identical preset temperature range, when humidity presets humidity lower than the 6th, performance element stops.
Preferably, the second preset temperature preferably 15 DEG C, the 3rd preset temperature preferably 20 DEG C, the 5th presets the preferred 80%RH of humidity, and the 6th presets the preferred 73%RH of humidity;
(4) when temperature is higher than the 3rd preset temperature, when humidity is more than seven preset temperatures, performance element runs; In identical preset temperature range, when humidity presets humidity lower than the 8th, performance element stops. Preferably, the 3rd preset temperature preferably 20 DEG C, the 7th presets the preferred 75%RH of humidity, and the 8th presets the preferred 70%RH of humidity.
Above-mentioned preferred version is according to rate of metal corrosion and relative air humidity curve and the rate of metal corrosion control strategy detailed with the formulation of air themperature relation curve; for different temperature ranges; different humidity threshold is adopted to determine entry condition and the stop condition of performance element; under guaranteeing the uncorroded situation of ring main unit, farthest save the power consumption of system, improve except dew efficiency.
Obviously, above-described embodiment is only for clearly demonstrating example, and is not the restriction to embodiment. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also cannot all of embodiment be given exhaustive. And the apparent change thus extended out or variation are still among the protection domain of the invention.
Claims (6)
1. an intelligent ring main unit condensation eliminates system, it is characterised in that include collecting unit, judging unit and performance element;
Wherein, described collecting unit is for gathering temperature value in described ring main unit and humidity value; Described judging unit is used for receiving described temperature value and humidity value, and carries out removing dew action according to the relation of described temperature value and at least one preset temperature threshold value and the relation described performance element of control of described humidity value and at least one default humidity threshold.
2. system according to claim 1, it is characterised in that described preset temperature threshold value and default humidity threshold all have multiple, plurality of preset temperature threshold value can divide multiple different temperature range, each at least 1 humidity threshold of temperature range correspondence.
3. system according to claim 2, it is characterized in that, first described judging unit determines the temperature range residing for described temperature value, after determining temperature range, the relation of at least 1 humidity threshold corresponding to temperature range judging described humidity value and determine, and carry out removing dew action according to the judged result described performance element of control.
4. system according to claim 3, it is characterized in that, humidity value that described judging unit comparison is current and the first humidity threshold corresponding to the temperature range determined, when described humidity value is more than described first humidity threshold, control described performance element to start to remove dew, until when humidity value is less than the second humidity threshold corresponding to the temperature range determined, controlling described performance element and stop except dew.
5. the system according to any one of claim 1-4, it is characterised in that described performance element is heater, is arranged on the inwall of described ring main unit.
6. the system according to any one of claim 1-4, it is characterised in that described performance element is exhaust fan, is arranged on sidewall or the roof of described ring main unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610012409.4A CN105676920A (en) | 2016-01-08 | 2016-01-08 | Condensation elimination system of intelligent ring main unit |
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| CN201610012409.4A CN105676920A (en) | 2016-01-08 | 2016-01-08 | Condensation elimination system of intelligent ring main unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110248523A (en) * | 2019-06-12 | 2019-09-17 | 江苏瑞奇海力科技有限公司 | A kind of elevator control cabinet temprature control method and device |
| CN110926196A (en) * | 2019-12-06 | 2020-03-27 | 国网福建省电力有限公司 | Automatic dehumidifying device for dam leading wire instrument |
| CN111855734A (en) * | 2020-08-04 | 2020-10-30 | 云南电力技术有限责任公司 | Ring main unit condensation monitoring and early warning device and early warning method thereof |
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Patent Citations (5)
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| US20050193957A1 (en) * | 2001-12-14 | 2005-09-08 | Shigeru Oshima | Animal breeding system and utilization of the system |
| US20080203178A1 (en) * | 2004-03-01 | 2008-08-28 | Neil John Barrett | Method and Apparatus for Environmental Control |
| CN102880208A (en) * | 2011-07-12 | 2013-01-16 | 珠海格力电器股份有限公司 | Method, apparatus and system for controlling temperature and humidity |
| CN104150605A (en) * | 2014-08-29 | 2014-11-19 | 江苏钰明集团有限公司 | Floating island type complex organism river purifier |
| CN104331108A (en) * | 2014-10-09 | 2015-02-04 | 国家电网公司 | Dehumidifier and control method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110248523A (en) * | 2019-06-12 | 2019-09-17 | 江苏瑞奇海力科技有限公司 | A kind of elevator control cabinet temprature control method and device |
| CN110926196A (en) * | 2019-12-06 | 2020-03-27 | 国网福建省电力有限公司 | Automatic dehumidifying device for dam leading wire instrument |
| CN111855734A (en) * | 2020-08-04 | 2020-10-30 | 云南电力技术有限责任公司 | Ring main unit condensation monitoring and early warning device and early warning method thereof |
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Application publication date: 20160615 |