CN105509818A - High-voltage cabinet dew point detection system and method thereof - Google Patents

High-voltage cabinet dew point detection system and method thereof Download PDF

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Publication number
CN105509818A
CN105509818A CN201610070618.4A CN201610070618A CN105509818A CN 105509818 A CN105509818 A CN 105509818A CN 201610070618 A CN201610070618 A CN 201610070618A CN 105509818 A CN105509818 A CN 105509818A
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CN
China
Prior art keywords
voltage board
temperature
dew
point detection
humiture
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Pending
Application number
CN201610070618.4A
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Chinese (zh)
Inventor
苏和
陆剑云
蒋树风
朱群潇
孙冬
蒋俊飞
曹健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201610070618.4A priority Critical patent/CN105509818A/en
Publication of CN105509818A publication Critical patent/CN105509818A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/24Circuit arrangements for boards or switchyards
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/28Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56Cooling; Ventilation
    • H02B1/565Cooling; Ventilation for cabinets

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

The invention relates to a high-voltage cabinet dew point detection system and a method thereof. The system comprises a remote computer, a main controller and a temperature and humidity transmitter used for acquiring indoor and outdoor temperature and humidity data changes of a high-voltage cabinet. The temperature and humidity transmitter sensitively detects temperature and humidity value changes in air, converts the changes into electric signals and transmits the electric signals to a system host, namely the main controller, through an RS-485 bus. The system host processes, converts, displays and stores data, compares the data with a set value and controls a warning unit and a dehumidifying corollary device to work. Besides, the main controller transmits the data and state content to the remote computer. Accordingly, temperature, humidity and dew point data in the 35 kV high-voltage cabinet can be directly detected. Prevention is conducted before equipment in the cabinet, especially a busbar, generates condensation. Meanwhile, the dehumidifying corollary device can be controlled to dehumidify the interior of the cabinet in a linkage mode, the dew point in the cabinet is lowered, work efficiency is improved, loads of operators are reduced, and the requirement of power industry development in China is also met.

Description

A kind of high-voltage board dew-point detection system and method thereof
Technical field
What the present invention relates to is a kind of high-voltage board dew point detection field, and what be specifically related to is a kind of 35kV high-voltage board dew-point detection system and method.
Background technology
Current dew point detector on the market, main flow detection method a minute surface is in sample soft air lower the temperature, until dimly visible dew drips the moment of (or ice crystal) on minute surface, measures minute surface medial temperature, be dew (frost) some temperature.Its humidity measurement precision is high, but the minute surface that light requirement cleanliness is very high, the temperature control system that precision is very high, and the very high dew of sensitivity drips the optical detection system of (ice crystal).The pipeline of suction sample air must be made during use to keep clean, otherwise the impurity in pipeline is by absorption or release moisture and cause measuring error, the problem of its " on-line measurement is difficult, expensive, it is cumbersome to operate, maintaining is complicated, poor stability " of existing.Separately there is the method such as electric transducer formula, electric Jie's French, measuring accuracy is low, poor stability, prior art can only detect dewpoint temperature simultaneously, but effectively do not control dewpoint temperature method, that just can not be applied to some have particular/special requirement some occasions to dewpoint temperature, greatly limit the expansion of its economic results in society and application.
In current 35kV high-voltage board, dew point detects and controls or blank, but it is necessary again, in high-voltage board, dewpoint temperature can embody the condensation situation offeing for sale interior intuitively, detect and control dewpoint temperature cabinet internal cause just can be avoided to produce condensation and in the cabinet that causes the dielectric strength of equipment especially bus bar reduce, and then the accident of the insulating part dielectric surface flashover occurred or switch blast, have a strong impact on its safe and stable operation.
Summary of the invention
For the deficiency that prior art exists, the present invention seeks to be to provide a kind of high-voltage board dew-point detection system and method thereof, can epidemic disaster in direct-detection 35kV high-voltage board and dew point data, equipment in cabinet, especially bus bar prevent before producing condensation, can carry out dehumidifying in cabinet by other equipment of coordinated signals simultaneously, reduce dew point in cabinet, improve work efficiency, alleviate the burden of operations staff, avoid the accident of insulating part dielectric surface flashover or switch blast to occur.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of high-voltage board dew-point detection system, comprising:
Temperature Humidity Sensor, for gathering high-voltage board indoor and outdoor humiture data variation;
Master controller, is connected with display module, the dehumidifying support equipment of high-voltage board and warning circuit; For carrying out collection humiture data processing, being scaled dewpoint temperature and storing display, judge whether to reach condensation state simultaneously, whether start support equipment, and be sent to remote computer to by its data, state content;
Single-chip microcomputer, is connected with Temperature Humidity Sensor, for storing the humiture data of humiture converter collection and be transferred to master controller by communication module.
According to above-mentioned high-voltage board dew-point detection system, wherein, operational amplifier and A/D converter is also connected with between described Temperature Humidity Sensor and single-chip microcomputer, the input end of described Temperature Humidity Sensor output terminal concatenation operation amplifier, the output terminal of described operational amplifier connects the input end of A/D converter, and the output terminal of described A/D converter connects single-chip microcomputer.
According to above-mentioned high-voltage board dew-point detection system, wherein, described single-chip microcomputer is also connected with RAM (random access memory).
According to above-mentioned high-voltage board dew-point detection system, wherein, described Temperature Humidity Sensor is provided with three, and three described Temperature Humidity Sensors are respectively Temperature Humidity Sensor in the cabinet that is arranged in high-voltage board, are arranged on the indoor temperature and humidity sensor in room, high-voltage board place and are buried in the underground Temperature Humidity Sensor of underground, room, high-voltage board place.
According to above-mentioned high-voltage board dew-point detection system, wherein, what described communication module adopted is RS485 communication module, and described single-chip microcomputer converts 485 communication digital signals to by RS485 communication module, and by on-the-spot RS-485 bus, signal is delivered to master controller.
According to above-mentioned high-voltage board dew-point detection system, wherein, described master controller is also connected with and sends signal and communication board master controller output signal being sent to remote computer for receiving communication module, described communication board adopts existing communication apparatus, and remote computer communication may be selected to ripe module as recording instrument without paper.
According to above-mentioned high-voltage board dew-point detection system, wherein, described support equipment comprises blower fan, dehumidifier etc.
The present invention separately provides a kind of high-voltage board dew point detection method, and its method step is as follows:
(1) high-voltage board indoor and outdoor humiture data acquisition; Respectively by Temperature Humidity Sensor Real-time Collection high-voltage board, the humiture data of indoor and indoor underground, high-voltage board place, high-voltage board place, and send collection humiture data to master controller;
(2) judge whether to reach condensation state; The humiture data processing that master controller carries out gathering step (1), be scaled dewpoint temperature and store display, and judge whether to reach condensation state, compared with the outer temperature of dewpoint temperature in high-voltage board and cabinet, numerical value is lower than the difference parameter of setting, then be judged as reaching condensation state in high-voltage board, otherwise be non-condensation state, and dewpoint temperature data and state content are sent to remote computer.Wherein parameter difference can manually be changed, and the outer temperature of cabinet comprises the indoor subsurface temperature value in indoor, high-voltage board place and high-voltage board place;
(3) judge whether to start preventive measure; When master controller is judged as being in condensation state, start alarm unit, the dehumidifying support equipment simultaneously starting high-voltage board carries out dehumidifying condensation proof measure.
According to above-mentioned pressure cabinet dew point detection method, wherein, in above-mentioned steps (2), the humiture data processing that master controller carries out gathering step (1), the method being scaled dewpoint temperature are as follows:
A () is tabled look-up; The humiture numerical value that inquiry is equal with the humiture numerical value gathered in room air dew point question blank, if there is same temperature humidity, then takes out corresponding dew point value; If without same temperature humidity, then by dew-point curve figure, humiture numerical value is converted into dew point value, namely following formulae discovery draws:
Humidity logarithm H=(log10 (RH)-2)/0.4343+ (17.62 × T)/(243.12+T)
Dew point Dp=243.12 × H/17.62-H
Wherein, humidity RH; Temperature T.
The present invention can temperature in direct-detection 35kV high-voltage board, humidity and dew point data, the condensation situation offeing for sale interior can be embodied intuitively, equipment in cabinet, especially bus bar prevents before producing condensation, dehumidifying in cabinet can be carried out by other equipment of coordinated signals (as rotary dehumidifier etc.) simultaneously, reduce dew point in cabinet, improve work efficiency, alleviate the burden of operations staff, avoid cabinet internal cause produce condensation and in the cabinet that causes the dielectric strength of equipment especially bus bar reduce, and then avoid the accident of insulating part dielectric surface flashover or the switch blast occurred, and had a strong impact on the problem of its safe and stable operation, also meet the needs of China's electric power industry development simultaneously, thus have broad application prospects, larger economic benefit and social benefit can be produced.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the schematic diagram of humiture transducer of the present invention;
Fig. 2 is the theory diagram of system host of the present invention;
Fig. 3 is overall system diagram of the present invention.
Embodiment
The technological means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
See Fig. 1 Fig. 3, a kind of high-voltage board dew-point detection system of the present embodiment, the single-chip microcomputer comprising remote computer, master controller, Temperature Humidity Sensor and be connected with Temperature Humidity Sensor; Wherein, operational amplifier and A/D converter is also connected with between Temperature Humidity Sensor and single-chip microcomputer; The input end of described Temperature Humidity Sensor output terminal concatenation operation amplifier, the output terminal of described operational amplifier connects the input end of A/D converter, and the output terminal of A/D converter connects single-chip microcomputer.
In the present embodiment, Temperature Humidity Sensor concatenation operation amplifier, A/D converter and single-chip microcomputer form humiture transducer, what Temperature Humidity Sensor adopted is high sensitivity Temperature Humidity Sensor, namely high precision is selected, highly sensitive, stable product, for gathering high-voltage board indoor and outdoor humiture data variation, when in cabinet during epidemic disaster generation subtle change, Temperature Humidity Sensor can respond this some changes immediately.The Temperature Humidity Sensor of the present embodiment is provided with three, be respectively Temperature Humidity Sensor in the cabinet that is arranged in high-voltage board, be arranged on the indoor temperature and humidity sensor in room, high-voltage board place and be buried in the underground Temperature Humidity Sensor of underground, room, high-voltage board place, therefore the operational amplifier corresponding with it, A/D converter and single-chip microcomputer connect and compose three humiture transducers, be respectively humiture transducer in cabinet, indoor temperature and humidity transmitter and underground humiture transducer.For the feature of Temperature Humidity Sensor drift large (reaching full scale), humiture transducer circuit possesses Zero-tracking ability.Further, humiture transducer should be considered to prevent dust accretions, and humiture transducer is domestic has reliable module to choose.Meanwhile, multiple humiture transducer is set, the consistance shown when ensureing no signal.
The single-chip microcomputer of the present embodiment is also connected with RAM, for storing the humiture data detecting and gather, and convert by RS485 communication module the humiture data that three humiture transducers detect to 485 communication digital signals, and by on-the-spot RS-485 bus, signal is delivered to master controller.Master controller connects, and has dehumidifying support equipment and the warning circuit of display module, high-voltage board; For carrying out collection humiture data processing, being scaled dewpoint temperature and storing display, judge whether to reach condensation state simultaneously, whether start support equipment, and be sent to remote computer to by its data, state content.
In addition, master controller is also connected with and sends signal and communication board master controller output signal being sent to remote computer for receiving communication module, described communication board adopts existing communication apparatus, and remote computer communication may be selected to ripe module as recording instrument without paper.
The present embodiment carries out high-voltage board dew point detection method by above-mentioned checkout equipment, and its method step is as follows:
(1) high-tension electricity cabinet indoor and outdoor humiture data acquisition; Respectively by Temperature Humidity Sensor Real-time Collection high-voltage board, the humiture data of indoor and indoor underground, high-voltage board place, high-voltage board place, and send collection humiture data to master controller;
(2) judge whether to reach condensation state; The humiture data processing that master controller carries out gathering step (1), be scaled dewpoint temperature and store display, and judge whether to reach condensation state, compared with the outer temperature of dewpoint temperature in high-voltage board and cabinet, numerical value is lower than the difference parameter of setting, then be judged as reaching condensation state in high-voltage board, otherwise be non-condensation state, and dewpoint temperature data and state content are sent to remote computer.Wherein parameter difference can manually be changed, and the outer temperature of cabinet comprises the indoor subsurface temperature value in indoor, high-voltage board place and high-voltage board place.
In the present embodiment, the humiture data processing that master controller carries out gathering step (1), the method being scaled dewpoint temperature are as follows:
The humiture numerical value that inquiry is equal with the humiture numerical value gathered in room air dew point question blank, if there is same temperature humidity, then takes out corresponding dew point value; If without same temperature humidity, then by dew-point curve figure, humiture numerical value is converted into dew point value, namely following formulae discovery draws:
Humidity logarithm H=(log10 (RH)-2)/0.4343+ (17.62 × T)/(243.12+T)
Dew point Dp=243.12 × H/17.62-H
Wherein, humidity RH; Temperature T.
(3) judge whether to start preventive measure; When master controller is judged as being in condensation state, start alarm unit, the dehumidifying support equipment simultaneously starting high-voltage board carries out dehumidifying condensation proof measure.
In the present embodiment, except the isolation of consideration signal, isolate, interfering energy absorbs, reduce except single-chip microcomputer frequency etc. measure, lay special stress on system power supply reliability and the accuracy converted to dewpoint temperature.
Based on above-mentioned, humiture transducer sensitivity of the present invention detects humiture magnitude variations in air, and converts thereof into electric signal, and be sent to system host and master controller by RS-485 bus, system host completes data processing, conversion, display, storage.Compare with setting value, control alarm unit and supporting external equipment (as blower fan, dehumidifier etc.) action.On the other hand, its data, state content are sent to remote computer (Central Control Room) by system host; Thus can epidemic disaster in direct-detection 35kV high-voltage board and dew point data, equipment in cabinet, especially bus bar prevents before producing condensation, dehumidifying in cabinet can be carried out by other equipment of coordinated signals (as rotary dehumidifier etc.) simultaneously, reduce dew point in cabinet, improve work efficiency, alleviate the burden of operations staff, also meet the needs of China's electric power industry development simultaneously, thus have broad application prospects, larger economic benefit and social benefit can be produced.
In high-voltage board of the present invention, dewpoint temperature can embody the condensation situation offeing for sale interior intuitively, detect and control dewpoint temperature cabinet internal cause just can be avoided to produce condensation and in the cabinet that causes the dielectric strength of equipment especially bus bar reduce, and then avoid the accident of insulating part dielectric surface flashover or the switch blast occurred, have a strong impact on its safe and stable operation.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (9)

1. a high-voltage board dew-point detection system, comprising:
Temperature Humidity Sensor, for gathering high-voltage board indoor and outdoor humiture data variation;
Master controller, is connected with display module, the dehumidifying support equipment of high-voltage board and warning circuit; For carrying out collection humiture data processing, being scaled dewpoint temperature and storing display, judge whether to reach condensation state simultaneously, whether start support equipment, and be sent to remote computer to by its data, state content;
Single-chip microcomputer, is connected with Temperature Humidity Sensor, for storing the humiture data of humiture converter collection and be transferred to master controller by communication module.
2. high-voltage board dew-point detection system according to claim 1, it is characterized in that, operational amplifier and A/D converter is also connected with between described Temperature Humidity Sensor and single-chip microcomputer, the input end of described Temperature Humidity Sensor output terminal concatenation operation amplifier, the output terminal of described operational amplifier connects the input end of A/D converter, and the output terminal of described A/D converter connects single-chip microcomputer.
3. high-voltage board dew-point detection system according to claim 1, is characterized in that described single-chip microcomputer is also connected with random access memory.
4. high-voltage board dew-point detection system according to claim 1, it is characterized in that described Temperature Humidity Sensor is provided with three, three described Temperature Humidity Sensors are respectively Temperature Humidity Sensor in the cabinet that is arranged in high-voltage board, are arranged on the indoor temperature and humidity sensor in room, high-voltage board place and are buried in the underground Temperature Humidity Sensor of underground, room, high-voltage board place.
5. high-voltage board dew-point detection system according to claim 1, what it is characterized in that described communication module adopts is RS485 communication module, described single-chip microcomputer converts 485 communication digital signals to by RS485 communication module, and by on-the-spot RS-485 bus, signal is delivered to master controller.
6. high-voltage board dew-point detection system according to claim 1, is characterized in that described master controller is also connected with and sends signal and communication board master controller output signal being sent to remote computer for receiving communication module.
7. high-voltage board dew-point detection system according to claim 1, is characterized in that described support equipment comprises blower fan, dehumidifier.
8. a high-voltage board dew point detection method, its method step is as follows:
(1) high-voltage board indoor and outdoor humiture data acquisition; Respectively by Temperature Humidity Sensor Real-time Collection high-voltage board, the humiture data of indoor and indoor underground, high-voltage board place, high-voltage board place, and send collection humiture data to master controller;
(2) judge whether to reach condensation state; Humiture data in the high-voltage board of collection carry out processing, being scaled dewpoint temperature and storing display by master controller comparison step (1), and judge whether to reach condensation state, compared with the outer temperature of dewpoint temperature in high-voltage board and cabinet, numerical value is lower than the difference parameter of setting, then be judged as reaching condensation state in high-voltage board, otherwise be non-condensation state, and dewpoint temperature data and state content are sent to remote computer;
(3) judge whether to start preventive measure; When master controller is judged as being in condensation state, start alarm unit, the dehumidifying support equipment simultaneously starting high-voltage board carries out dehumidifying condensation proof measure.
9. high-voltage board dew point detection method according to claim 8, is characterized in that, in above-mentioned steps (2), the humiture data processing that master controller carries out gathering step (1), the method being scaled dewpoint temperature are as follows:
The humiture numerical value that inquiry is equal with the humiture numerical value gathered in room air dew point question blank, if there is same temperature humidity, then takes out corresponding; If without same temperature humidity, then by dew-point curve figure, humiture numerical value is converted into dew point value, namely following formulae discovery draws:
Humidity logarithm H=(log10 (RH)-2)/0.4343+ (17.62 × T)/(243.12+T)
Dew point Dp=243.12 × H/17.62-H
Wherein, humidity RH; Temperature T.
CN201610070618.4A 2016-02-01 2016-02-01 High-voltage cabinet dew point detection system and method thereof Pending CN105509818A (en)

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CN106196347A (en) * 2016-07-14 2016-12-07 无锡普爱德环保科技有限公司 Single rotary-type dehumidification system
CN106931574A (en) * 2017-04-21 2017-07-07 深圳市德赛工业研究院有限公司 Anti-condensation system and method in intelligent building room
CN107063353A (en) * 2017-04-26 2017-08-18 辽宁有色勘察研究院 A kind of rock cave condensate prevents and treats monitoring method
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CN111342349A (en) * 2020-03-31 2020-06-26 国网江苏省电力有限公司无锡供电分公司 Accurate monitoring method and device for condensation in high-voltage switch cabinet
CN111504361A (en) * 2019-11-28 2020-08-07 中车时代电动汽车股份有限公司 Method and system for detecting condensation condition inside driving motor
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CN106196347A (en) * 2016-07-14 2016-12-07 无锡普爱德环保科技有限公司 Single rotary-type dehumidification system
CN106931574A (en) * 2017-04-21 2017-07-07 深圳市德赛工业研究院有限公司 Anti-condensation system and method in intelligent building room
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Application publication date: 20160420