CN106770459A - High pressure enclosed busbar dew point monitoring device and control method - Google Patents

High pressure enclosed busbar dew point monitoring device and control method Download PDF

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Publication number
CN106770459A
CN106770459A CN201611224604.XA CN201611224604A CN106770459A CN 106770459 A CN106770459 A CN 106770459A CN 201611224604 A CN201611224604 A CN 201611224604A CN 106770459 A CN106770459 A CN 106770459A
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China
Prior art keywords
enclosed busbar
air
dew point
high pressure
chip microcomputer
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CN201611224604.XA
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Chinese (zh)
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朱德志
胡春花
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Zhenjiang College
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Zhenjiang College
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Priority to CN201611224604.XA priority Critical patent/CN106770459A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
    • G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

The invention discloses a kind of high pressure enclosed busbar dew point monitoring device and control method, device includes single-chip microcomputer, temperature sensing circuit, relative humidity detects circuit, digital-scroll technique circuit, enclosed busbar drying device, enclosed busbar hot-air maintenance device, the temperature sensing circuit, relative humidity detection circuit is connected with single-chip microcomputer, the air themperature that will be detected, relative humidity signal is input into single-chip microcomputer, the digital-scroll technique circuit, enclosed busbar drying device, enclosed busbar hot-air maintenance device is connected with single-chip microcomputer, the Single-chip Controlling enclosed busbar drying device, the work of enclosed busbar hot-air maintenance device.The present invention judges that high pressure enclosed busbar produces the accurate temperature value of condensation by detecting the relative humidity in enclosed busbar and temperature value; drying device and hot-air maintenance device is set accurately to start before close dew temperature, it is to avoid the situation that guard delay or pre-cooling waste the energy occurs.

Description

High pressure enclosed busbar dew point monitoring device and control method
Technical field
The present invention relates to a kind of dew point monitoring device, more particularly to a kind of high pressure enclosed busbar dew point monitoring device and control Method, belongs to energy monitoring apparatus technical field.
Background technology
The high pressure enclosed busbar of generator outlet employed in order to prevent moisture from invading, typically enclosed busbar drying device and Enclosed busbar hot-air maintenance device, device is all automatic running, is required for constantly detecting the running environment of enclosed busbar, once it is damp Gas is overweight, and starter dehumidifying immediately is removed moisture.
Prior art uses relative humidity instrument as the detection means of moisture, and equipment manufacturing cost is cheap.Enclosed busbar often by Generate heat or turn cold in output generator current change, the change of temperature and current relative humidity situation are cooperatively formed and finished Reveal phenomenon and cause insulation damages, only detect humidity condition by relative humidity instrument and start hot blast maintenance and drying device Accuracy is not high, it is impossible to accurately judge dew point in bus, exists or starts waste mass energy too early, or start delay is made Made moist the hidden situation of initiation accident into bus condensation.
The content of the invention
It is an object of the invention to provide a kind of high pressure enclosed busbar dew point monitoring device and control method, sealed by detecting The relative humidity closed in bus and temperature value produce the accurate temperature value of condensation to judge high pressure enclosed busbar, make drying device and Hot-air maintenance device accurately starts before close dew temperature, it is to avoid the situation that guard delay or pre-cooling waste the energy occurs.
The purpose of the present invention is achieved by the following technical programs：
A kind of high pressure enclosed busbar dew point monitoring device, including single-chip microcomputer 1, temperature sensing circuit 2, relative humidity detection electricity Road 3, digital-scroll technique circuit 4, enclosed busbar drying device 5, enclosed busbar hot-air maintenance device 6, the temperature sensing circuit 2, Relative humidity detection circuit 3 is connected with single-chip microcomputer 1, air themperature, the relative humidity signal input single-chip microcomputer 1 that will be detected, described Digital-scroll technique circuit 4, enclosed busbar drying device 5, enclosed busbar hot-air maintenance device 6 are connected with single-chip microcomputer 1, the single-chip microcomputer The 1 control enclosed busbar drying device 5, work of enclosed busbar hot-air maintenance device 6.
A kind of control method of high pressure enclosed busbar dew point monitoring device, comprises the following steps：
1) collection air themperature t, air pressure P, relative air humidity RH；
2) P is calculatedWS, PWSThe partial pressure of saturated vapor is represented,
Wherein parameter A, m, Tn are as follows with air themperature t relations：
When air themperature t scopes are -40~50 DEG C, A=6.1078, m=7.5, Tn=237.3；
When air themperature t scopes are 50~100 DEG C, A=6.9987, m=7.3313, Tn=229.1；
When air themperature t scopes are 100~150 DEG C, A=6.8493, m=7.2756, Tn=225.0；
When air themperature t scopes are 150~180 DEG C, A=6.2301, m=7.3033, Tn=230.0；
3) air dew point temperature Td is calculated：
4) display air dew point temperature Td；
5) before air themperature t reaches air dew point temperature Td, enclosed busbar drying device 5, enclosed busbar hot blast is started Care device 6 works.
The purpose of the present invention can also further be realized by following technical measures：
Foregoing high pressure enclosed busbar dew point monitoring device, wherein the model STC89C52 of single-chip microcomputer 1.
Foregoing high pressure enclosed busbar dew point monitoring device, wherein temperature sensing circuit 2 are using DS18B20 integrated temperatures sensing Device circuit.
Foregoing high pressure enclosed busbar dew point monitoring device, wherein relative humidity detection circuit 3 use HS1101 relative humidity Sensor circuit.
Foregoing high pressure enclosed busbar dew point monitoring device, wherein digital-scroll technique circuit 4 use 1602 LCD circuits.
Compared with prior art, the beneficial effects of the invention are as follows：The temperature and moisture sensors of the present apparatus are installed on closing In bus, air themperature and humidity are constantly detected, then carry out mathematical computations prediction dew point energy according to the formation basic theory of dew point Enough temperature values for being formed, accurate startup is dried and hot-air maintenance device improves degree of being air-dried and air themperature before close dew temperature The effect for making that dew cannot be formed in bus is reached, equipment is reliable and simple, cheap.
Brief description of the drawings
Fig. 1 is circuit structure diagram of the invention；
Fig. 2 is STC89C52 single chip circuits figure of the present invention；
Fig. 3 is integrated temperature sensor circuit diagram of the present invention；
Fig. 4 is relative humidity sensor circuit diagram of the present invention；
Fig. 5 is LCD circuit of the present invention.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, high pressure enclosed busbar dew point monitoring device, including single-chip microcomputer 1, temperature sensing circuit 2, relative humidity Detection circuit 3, digital-scroll technique circuit 4, enclosed busbar drying device 5, enclosed busbar hot-air maintenance device 6, the temperature detection Circuit 2, relative humidity detection circuit 3 is connected with single-chip microcomputer 1, air themperature, the relative humidity signal input single-chip microcomputer that will be detected 1, the digital-scroll technique circuit 4, enclosed busbar drying device 5, enclosed busbar hot-air maintenance device 6 are connected with single-chip microcomputer 1, described Single-chip microcomputer 1 controls the enclosed busbar drying device 5, work of enclosed busbar hot-air maintenance device 6.
The model STC89C52 of the single-chip microcomputer 1, single machine unit circuit diagram is as shown in Figure 2.
The temperature sensing circuit 2 uses DS18B20 integrated temperature sensor circuits, as shown in Figure 3.
The relative humidity detection circuit 3 uses HS1101 relative humidity sensors, as shown in Figure 4.
The digital-scroll technique circuit 4 uses 1602 LCD circuits, as shown in Figure 5.
Because in the case where air pressure value is constant, current air temperature value t and present air rh value RH determine Air dew point temperature Td is determined.
The control method of high pressure enclosed busbar dew point monitoring device of the present invention, comprises the following steps：
1) collection air themperature t, air pressure P, relative air humidity RH；
2) P is calculatedWS, PWSThe partial pressure of saturated vapor is represented,
Wherein parameter A, m, Tn are as follows with air themperature t relations：
When air themperature t scopes are -40~50 DEG C, A=6.1078, m=7.5, Tn=237.3；
When air themperature t scopes are 50~100 DEG C, A=6.9987, m=7.3313, Tn=229.1；
When air themperature t scopes are 100~150 DEG C, A=6.8493, m=7.2756, Tn=225.0；
When air themperature t scopes are 150~180 DEG C, A=6.2301, m=7.3033, Tn=230.0；
3) air dew point temperature Td is calculated：
4) display air dew point temperature Td；
5) before air themperature t reaches air dew point temperature Td, enclosed busbar drying device 5, enclosed busbar is started in time Hot-air maintenance device 6 works, and prevents the formation of dew point.
Enclosed busbar hot blast is maintained and drying device is all the powerful equipment of highly energy-consuming, such as enclosed busbar hot blast maintenance Device is the power of 30KW, 60 minutes every time, then over a year to consume 3600KWH if early starting within average one month 10 times more, Calculated by 0.39 yuan/KWH of desulfurization rate for incorporation into the power network, expend 1404 yuan of electricity charge more.The present invention substantially increases enclosed busbar hot blast guarantor The accuracy with drying device start-up temperature is supported, the safety in operation of enclosed busbar is improve, tradition is only relative by tradition Hygronom start and controls that inaccurate situation can be caused, and condensation short circuit can be caused if starting too late, and great peace occurs Full accident.There is huge security to improve compared to traditional relative humidity monitor and energy saving is acted on, effect is significant.
In addition to the implementation, the present invention can also have other embodiment, all use equivalents or equivalent transformation shape Into technical scheme, all fall within the protection domain of application claims.

Claims (6)

1. a kind of high pressure enclosed busbar dew point monitoring device, it is characterised in that including single-chip microcomputer, temperature sensing circuit, relatively wet Degree detection circuit, digital-scroll technique circuit, enclosed busbar drying device, enclosed busbar hot-air maintenance device, the temperature detection electricity Road, relative humidity detection circuit are connected with single-chip microcomputer, air themperature, the relative humidity signal input single-chip microcomputer that will be detected, described Digital-scroll technique circuit, enclosed busbar drying device, enclosed busbar hot-air maintenance device are connected with single-chip microcomputer, the Single-chip Controlling The work of enclosed busbar drying device, enclosed busbar hot-air maintenance device.
2. high pressure enclosed busbar dew point monitoring device as claimed in claim 1, it is characterised in that the model of the single-chip microcomputer STC89C52。
3. high pressure enclosed busbar dew point monitoring device as claimed in claim 1, it is characterised in that the temperature sensing circuit is adopted With DS18B20 integrated temperature sensor circuits.
4. high pressure enclosed busbar dew point monitoring device as claimed in claim 1, it is characterised in that the relative humidity detection electricity Road uses HS1101 relative humidity sensor circuits.
5. high pressure enclosed busbar dew point monitoring device as claimed in claim 1, it is characterised in that the digital-scroll technique circuit is adopted Use 1602 LCD circuits.
6. a kind of control method of high pressure enclosed busbar dew point monitoring device as claimed in claim 1, it is characterised in that including Following steps：
1) collection air themperature t, air pressure P, relative air humidity RH；
2) PWS is calculated, PWS represents the partial pressure of saturated vapor,
Wherein parameter A, m, Tn are as follows with air themperature t relations：
When air themperature t scopes are -40~50 DEG C, A=6.1078, m=7.5, Tn=237.3；
When air themperature t scopes are 50~100 DEG C, A=6.9987, m=7.3313, Tn=229.1；
When air themperature t scopes are 100~150 DEG C, A=6.8493, m=7.2756, Tn=225.0；
When air themperature t scopes are 150~180 DEG C, A=6.2301, m=7.3033, Tn=230.0；
3) air dew point temperature Td is calculated：
T d = T n m lg ( P W S · R H 100 A ) - 1 ;
4) display air dew point temperature Td；
5) before air themperature t reaches air dew point temperature Td, enclosed busbar drying device, enclosed busbar hot blast maintenance dress are started Put work.
CN201611224604.XA 2016-12-27 2016-12-27 High pressure enclosed busbar dew point monitoring device and control method Pending CN106770459A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107907570A (en) * 2017-11-23 2018-04-13 华能沁北发电有限责任公司 A kind of compressed air pressure dew point on-line measuring device and its computational methods
CN109449767A (en) * 2018-09-18 2019-03-08 国网浙江省电力有限公司紧水滩水力发电厂 A kind of condensation-proof distribution box and its control method

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Publication number Priority date Publication date Assignee Title
US5343747A (en) * 1992-06-08 1994-09-06 Jay Rosen Normalized relative humidity calibration
JP2012083206A (en) * 2010-10-12 2012-04-26 Espec Corp Dew point meter, hygrometer, dew point derivation apparatus, humidity derivation apparatus, dew point measuring method and humidity measuring method
CN102830738A (en) * 2012-09-12 2012-12-19 江苏大全封闭母线有限公司 Device for preventing moisture condensation of closed bus
CN105651811A (en) * 2016-01-21 2016-06-08 北京航空航天大学 Device for measuring and controlling dew point temperature and implementation method thereof
CN205791376U (en) * 2016-06-27 2016-12-07 大唐淮北发电厂 A kind of enclosed busbar anti-condensation equipment for generating set
CN206330923U (en) * 2016-12-27 2017-07-14 镇江市高等专科学校 High pressure enclosed busbar dew point monitoring device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5343747A (en) * 1992-06-08 1994-09-06 Jay Rosen Normalized relative humidity calibration
JP2012083206A (en) * 2010-10-12 2012-04-26 Espec Corp Dew point meter, hygrometer, dew point derivation apparatus, humidity derivation apparatus, dew point measuring method and humidity measuring method
CN102830738A (en) * 2012-09-12 2012-12-19 江苏大全封闭母线有限公司 Device for preventing moisture condensation of closed bus
CN105651811A (en) * 2016-01-21 2016-06-08 北京航空航天大学 Device for measuring and controlling dew point temperature and implementation method thereof
CN205791376U (en) * 2016-06-27 2016-12-07 大唐淮北发电厂 A kind of enclosed busbar anti-condensation equipment for generating set
CN206330923U (en) * 2016-12-27 2017-07-14 镇江市高等专科学校 High pressure enclosed busbar dew point monitoring device

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张希仲等: "氯化锂露点式相对湿度计和调节器的研制", 《制冷学报》 *
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107907570A (en) * 2017-11-23 2018-04-13 华能沁北发电有限责任公司 A kind of compressed air pressure dew point on-line measuring device and its computational methods
CN107907570B (en) * 2017-11-23 2020-11-13 华能国际电力股份有限公司河南分公司 Compressed air pressure dew point online detection device and calculation method thereof
CN109449767A (en) * 2018-09-18 2019-03-08 国网浙江省电力有限公司紧水滩水力发电厂 A kind of condensation-proof distribution box and its control method

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