CN101149420A - SF6 circuit breaker gas on-line monitor - Google Patents
SF6 circuit breaker gas on-line monitor Download PDFInfo
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- CN101149420A CN101149420A CNA2006101131689A CN200610113168A CN101149420A CN 101149420 A CN101149420 A CN 101149420A CN A2006101131689 A CNA2006101131689 A CN A2006101131689A CN 200610113168 A CN200610113168 A CN 200610113168A CN 101149420 A CN101149420 A CN 101149420A
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Abstract
This invention is an online monitoring instrument for SF6 circuit breaker gas detection. The invention relates to detections of gas temperature, pressure and humidity. It makes use of the joint between SF6 circuit breakers gas filled interface and its gas leading-out junction to export gas. As the monitoring instrument well installed, the gas leading-out junction will open the anti-adverse valve of SF6 circuit breaker body air inflation interface automatically, so the air come into the air cavity each parameter is monitored through temperature sensor, pressure sensor and humidity sensor separately and showed after circuit disposal; it can apply to alarming and communications through some extended disposals. This monitoring instrument can realizes online monitoring and it has improved the automatization grade of inspection that abnormities can be discovered on time and accidents can be avoided.
Description
Technical field
The invention belongs to field of power, relate to the SF6 circuit breaker gas on-line monitor, specially refer to gas temperature, pressure and Humidity Detection.
Background technology
In the middle of the electric system primary equipment, primary cut-out is the large scale electrical power unit that is only second to generator and transformer, and the quantity that needs comes before the two with the scale that investment is installed.The health status of primary cut-out self, reliability of operation are directly connected to the safety and stablization of electric system, accidents such as many great device damage, power failure much all be since the operation of primary cut-out not normal due to.Development along with the social production life, people are more and more higher to the stability requirement of operation of power networks, this also impels electrical production unit of operation more and more to pay close attention to the health status of power equipment operation, wherein the SF6 isolating switch is as the bigger class power equipment of amount ratio, and the concern of itself health status is also grown with each passing day.In the maintenance of SF6 isolating switch, pay close attention to most no more than moisture measurement, because the humidity of SF6 gas is directly connected to the insulation of isolating switch itself and the quality of arc extinction performance to SF6 gas.The method of at present more common monitoring SF6 circuit breaker gas humidity is exactly that regularly the humidity measurement instruments such as dew point hygrometer from SF6 isolating switch inflation inlet derivation gas to special use utilize these instrument detecting gas humidities when annual spring inspection, autumn inspection.It is more accurate that this method detects humidity ratio, but also have following major defect: 1, need the SF6 isolating switch to stop transport, can not the equipment on-line operation, and it is poor to detect real-time, and this is unaccommodated for the isolating switch that is moving; 2, this detection method needs experienced professional and technical personnel's operation because operating process is loaded down with trivial details, and craftsmenship is strong; 3, this method can be wasted a large amount of gases when operation, also causes environmental pollution simultaneously.
What other was paid close attention to the most in the detection of SF6 isolating switch has been exactly SF6 gas temperature, pressure.The method of traditional detection temperature and pressure is exactly to utilize temperature, the manometer test that burrows on the isolating switch cavity and install respectively, this method detects accurately, but the installation of measuring instrument has destroyed breaker body, also may cause gas to leak simultaneously, brings a lot of negative effects.
Summary of the invention
The interface monitoring instrument that the objective of the invention is to design specialized, under the situation of not destroying breaker body, detect a plurality of parameters such as humidity, temperature and pressure of SF6 gas simultaneously, and can occur reporting to the police automatically when unusual in each parameter, realize the automatic monitoring of SF6 circuit breaker gas parameter, simultaneously can also realize multiple several biography mode, be convenient to Monitoring Data and read.
A kind of SF6 circuit breaker gas on-line monitor of the present invention, it contains SF6 isolating switch air chamber, SF6 breaker body inflation interface, gas derivation joint, temperature sensor, pressure transducer, humidity sensor, air cavity, treatment circuit, inflation interface, telepilot, wherein:
This SF6 isolating switch output terminal and SF6 breaker body inflation input interface join, this SF6 breaker body inflation interface output terminal and gas are derived the joint input end and are joined, this gas is derived the joint output terminal and the air cavity input end joins, processing of circuit is connected to described air cavity top, by sealed support temperature sensor, pressure transducer, humidity sensor are installed between this air cavity and processing of circuit, the output terminal of this air cavity links to each other with the inflation interface, and this treatment circuit joins by infrared interface and telepilot.
Wherein, described treatment circuit contains, single-chip microcomputer, EPROM, alarm, display, infrared chip, calendar clock, CAN bus, signal regulating panel, and wherein: signal regulating panel, its input information are temperature, pressure, the humidity of being monitored; Single-chip microcomputer, this single-chip microcomputer input signal interface links to each other with the output terminal of signal regulating panel, the infrared interface of this single-chip microcomputer and infrared chip interconnect, the display interface of this single-chip microcomputer links to each other with the input end of display, the remote alarm interface of this single-chip microcomputer and alarm interconnection, the memory interface of this single-chip microcomputer and EPROM interconnection, the monitoring interface of this single-chip microcomputer and calendar clock interconnection, the CAN bus interface of this single-chip microcomputer and CAN bus interconnection.
Wherein, described telepilot contains, single-chip microcomputer, display, infrared chip, button cell, keyboard, EPROM, wherein: the keyboard input interface and the keyboard output end of this single-chip microcomputer join, the display interface of this single-chip microcomputer and display input end join, the power interface of this single-chip microcomputer and button cell interconnection, the memory interface of this single-chip microcomputer links to each other with the output terminal of EPROM.
Wherein, the model of described single-chip microcomputer is ATMEGA128.
Wherein, the model of described calendar clock is PCF8563.
Wherein, carry out infrared communication by infrared interface between described processing of circuit and telepilot.
Wherein, the model of described EPROM is AT24C64.
Wherein, be provided with reverse checkvalve in the described inflation interface.
Wherein, described monitor shell is a stainless steel.
Wherein, there is a stainless steel cage sensor outside on described treatment circuit and the sealed support.
Wherein, described stainless steel cage directly screws in sealed support and is connected.
Wherein, on the described stainless steel cage clear glass window is arranged.
Wherein, described gas is derived joint and is screwed in SF6 breaker body inflation interface by threaded connector.
Wherein, the model of described single-chip microcomputer is ATMEGA16.
Wherein, the liquid crystal of described display is the 8*2 low temperature liquid crystal.
Wherein, described CAN bus chip is made up of SJA1000 and 80C250.
Wherein, described infrared chip is made up of infrared transmitting tube and infrared receiving tube.
A kind of SF6 circuit breaker gas on-line monitor of the present invention, its advantage and the effect that reaches are: the on-line monitoring that can realize SF6 circuit breaker gas temperature, pressure and humidity after it uses, improve the overhaul of the equipments automaticity, in time note abnormalities, avoid pernicious fault to take place; Reduce in the past detection method to man power and material's waste; Avoid gas leakage, prevent to cause atmospheric pollution.
Description of drawings
Fig. 1, be monitor hardware circuit figure of the present invention;
Fig. 2, be telepilot hardware circuit figure of the present invention;
Fig. 3, be monitor external structure figure of the present invention;
1, SF6 isolating switch air chamber; 2, SF6 breaker body inflation interface; 3, gas is derived joint; 4, temperature sensor; 5, pressure transducer; 6, humidity sensor; 7, air cavity; 8, treatment circuit; 9, inflation interface.
Fig. 4, for monitor primary control program flow process of the present invention;
Fig. 5, for data packet format of the present invention;
Fig. 6, be several frequently seen data transmission data packet format;
A, be that the time is provided with; B, be the threshold value setting; C, be the polling period setting; D, be the historical data transmission; E, for reporting to the police.
Fig. 7, for interrupt handling routine of the present invention;
Fig. 8, for overall appearance structural drawing of the present invention.
Embodiment
Technical scheme of the present invention is to utilize the monitor of isolating switch inflation inlet monitoring gas humidity, is used for the on-line monitoring of SF6 circuit breaker gas characterisitic parameter under the situation of not destroying breaker body.
Further specify the present invention below in conjunction with accompanying drawing.
1, monitor hardware configuration as shown in Figure 1
Monitor is a master cpu with single-chip microcomputer (ATMEGA128), and it is responsible for whole signals collecting, processing and various interface control.The l2 bit A/D converter that single-chip microcomputer (ATMEGA128) carries is realized conversion of signals such as temperature, pressure, humidity, shows through the liquor charging crystalline substance is local after software correction, the compensation.Liquid crystal is the 8*2 low temperature liquid crystal, can work in-30 ℃, and real-time temperature, pressure and humidity three parameters are in liquid crystal display cocycle roll display.The tester expansion has the CAN bus interface, this interface uses CAN bus special chip (SJA1000 and 80C250) to realize, utilize this interface to make things convenient for networking, Monitoring Data is transferred to the last layer LAN (Local Area Network) by bus network, simultaneously the last layer LAN (Local Area Network) also can be to the inner parameter of monitor: be provided with as alarm threshold value, polling period etc., and then realize the concentrated monitoring of whole applying unit SF6 isolating switch.Monitor is furnished with infrared interface simultaneously, and this interface is made up of infrared transmitting tube (SE303) and infrared receiving tube (PIC12043), can not utilize telepilot to read wherein data by this interface when monitor has networking.Calendar clock (PCF8563) is mainly used in the record monitoring date, makes time reference.Monitor can be reported to the police to the staff by alarm when monitoring temperature, pressure or humidity above (or having above trend) setting threshold, to arouse attention.
Supporting telepilot hardware circuit as shown in Figure 2.It is a master controller with the ATMEGA16 single-chip microcomputer on the whole, and outside expansion has: infrared interface, button cell, liquid crystal display, keyboard and EEPROM.Wherein infrared interface has equally by infrared transmitting tube (SE303) and infrared receiving tube (PIC12043) and forms, and is responsible for the transmission and the reception of data; EEPROM is mainly used in storage and respectively patrols and examines data; Telepilot uses the button cell power supply.When monitoring instrument did not have networking, the personnel of patrolling and examining can use a teleswitch and read regularly the historical data of monitoring automatically from on-the-spot each SF6 isolating switch monitor, can also use a teleswitch simultaneously and set each parameter of monitor.
On Fig. 1, Fig. 2 hardware foundation, the monitor surface structure of design as shown in Figure 3.
Monitor utilizes SF6 isolating switch inflation interface when concrete the use, design gas is derived joint 3 and derived gas from the inflation interface 2 on the isolating switch 1.Gas is derived joint 3 inner hollow, and monitor is installed the back, and it can derive joint 3 automatically to sinciput by gas, opens the reverse checkvalve of inflation inlet inside, makes the SF6 gas of isolating switch inside enter the monitor air cavity.In air cavity 7, utilize temperature sensor 4, pressure transducer 5, humidity sensor 6 to detect SF6 gas temperature, pressure, humidity respectively, after processing of circuit in 8, show each parameter, and can do extension process such as warning, communication.The 9th, the interface identical with SF6 breaker body inflation inlet 2 when isolating switch need be inflated, can use classic method that aerating device is connected in 9 directly inflations.Design has reverse checkvalve in 9, and reverse checkvalve is closed under the normal operation, could open automatically when having only in 9 the gas-charging connection of insertion and the external gas pressure big.
Monitor integral body designs structure such as accompanying drawing 8 for stainless steel.Top is stainless steel cage, directly screws in main body to be connected, and has the transparent grp window to be used to observe the inner parameter that shows, all right isolating exterior rain, snow, dust etc. on the cover.Each sensor passes airtight support and is installed in the air cavity, contacts with actual SF6 gas.Utilize Fig. 8 left side threaded connector to screw in the isolating switch inflation inlet during concrete the use, back down its inner reverse checkvalve always.Can directly the gas cylinder gas-charging connection directly be connected with monitor (as Fig. 8) right side interface in the time of need inflating for isolating switch and get final product.
2, software protocol
The software of tester mainly comprises master control handling procedure, CAN bus driver, infrared interface handling procedure.Wherein the master control handling procedure mainly carries out collection, processing of temperature, pressure and moisture signal etc.
As Fig. 4 is monitor primary control program process flow diagram.
CAN bus and infrared interface all are to carry out data communication, and two types of data communication all are by data packet transmission, and data packet length is by the data number decision that will send.Data packet format such as Fig. 5.
In the packet, packet header is that 8 bits " 0B 0C " of two bytes indicate; The address is to set the address with the monitor of upper machine communication, between 0～255; Character is the type of the data that will transmit in the bag, and the represented meaning of the direction heterogeneity sign indicating number of data transmission is also different; Number is the useful data number that sends in this bag, and follow-up data are only the useful content that really will transmit; Adopt the CRC16 verification in the data transmission of the present invention, check code is deposited enough two bytes; The packet tail is that " 0A 0D " indicates.
As Fig. 6 is several frequently-used data transmits data packets forms according to above-mentioned definition mode.
CAN bus driver mainly comprises two parts, and host computer active monitoring instrument is passive and monitor active host computer is passive.When the host computer active, monitor interrupt handling routine such as Fig. 7.
And when using infrared patrolling and examining, software processes is with the passive unanimity of monitor.
Claims (17)
1. SF6 circuit breaker gas on-line monitor, it is characterized in that: it contains SF6 isolating switch air chamber, SF6 breaker body inflation interface, gas derivation joint, temperature sensor, pressure transducer, humidity sensor, air cavity, treatment circuit, inflation interface, telepilot, wherein:
This SF6 isolating switch output terminal and SF6 breaker body inflation input interface join, this SF6 breaker body inflation interface output terminal and gas are derived the joint input end and are joined, this gas is derived the joint output terminal and the air cavity input end joins, processing of circuit is connected to described air cavity top, by sealed support temperature sensor, pressure transducer, humidity sensor are installed between this air cavity and processing of circuit, the output terminal of this air cavity links to each other with the inflation interface, and this treatment circuit joins by infrared interface and telepilot.
2. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that described treatment circuit contains, single-chip microcomputer, EPROM, alarm, display, infrared chip, calendar clock, CAN bus, signal regulating panel, wherein:
Signal regulating panel, its input information are temperature, pressure, the humidity of being monitored;
Single-chip microcomputer, this single-chip microcomputer input signal interface links to each other with the output terminal of signal regulating panel, the infrared interface of this single-chip microcomputer and infrared chip interconnect, the display interface of this single-chip microcomputer links to each other with the input end of display, the remote alarm interface of this single-chip microcomputer and alarm interconnection, the memory interface of this single-chip microcomputer and EPROM interconnection, the monitoring interface of this single-chip microcomputer and calendar clock interconnection, the CAN bus interface of this single-chip microcomputer and CAN bus interconnection.
3. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that described telepilot contains, single-chip microcomputer, display, infrared chip, button cell, keyboard, EPROM, wherein:
The keyboard input interface and the keyboard output end of this single-chip microcomputer join, and the display interface of this single-chip microcomputer and display input end join, the power interface of this single-chip microcomputer and button cell interconnection, and the memory interface of this single-chip microcomputer links to each other with the output terminal of EPROM.
4. SF6 circuit breaker gas on-line monitor as claimed in claim 2 is characterized in that: the model of described single-chip microcomputer is ATMEGA128.
5. SF6 circuit breaker gas on-line monitor as claimed in claim 2 is characterized in that: the model of described calendar clock is PCF8563.
6. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that: carry out infrared communication by infrared interface between described processing of circuit and telepilot.
7. as claim 2 or 3 described SF6 circuit breaker gas on-line monitors, it is characterized in that: the model of described EPROM is AT24C64.
8. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that: be provided with reverse checkvalve in the described inflation interface.
9. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that: described monitor shell is a stainless steel.
10. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that: there is a stainless steel cage sensor outside on described treatment circuit and the sealed support.
11. SF6 circuit breaker gas on-line monitor as claimed in claim 10 is characterized in that: described stainless steel cage directly screws in sealed support and is connected.
12. SF6 circuit breaker gas on-line monitor as claimed in claim 10 is characterized in that: on the described stainless steel cage clear glass window is arranged.
13. SF6 circuit breaker gas on-line monitor as claimed in claim 1 is characterized in that: described gas is derived joint and is screwed in SF6 breaker body inflation interface by threaded connector.
14. SF6 circuit breaker gas on-line monitor as claimed in claim 3 is characterized in that: the model of described single-chip microcomputer is ATMEGA16.
15. SF6 circuit breaker gas on-line monitor as claimed in claim 2 is characterized in that: the liquid crystal of described display is the 8*2 low temperature liquid crystal.
16. SF6 circuit breaker gas on-line monitor as claimed in claim 2 is characterized in that: described CAN bus chip is made up of SJA1000 and 80C250.
17. as claim 2 or 3 described SF6 circuit breaker gas on-line monitors, it is characterized in that: described infrared chip is made up of infrared transmitting tube and infrared receiving tube.
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| CNB2006101131689A CN100568010C (en) | 2006-09-18 | 2006-09-18 | The SF6 circuit breaker gas on-line monitor |
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| CNB2006101131689A CN100568010C (en) | 2006-09-18 | 2006-09-18 | The SF6 circuit breaker gas on-line monitor |
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| CN101149420A true CN101149420A (en) | 2008-03-26 |
| CN100568010C CN100568010C (en) | 2009-12-09 |
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