Lêgerdina Jîngeha û Pêvekirina Gazê û Dastûrên Bbardkirina Gasê ji bo Çerkevanên SF6 bê Dilanên Vekirî

Dêvên dîmîna bêt-sayî û bêt-kirina vanên geran-hewa li ser xebitandina normal bikar anîn da ku vanên geran-hewa bigihin û digehin. Wanê divê ji bo serbestkirina otomatîk û çep derbas bexwestin da ku vanên geran-hewa li ser kesekên kurtkirina qeseyan û rengkirina nahaqî yên elektrikî û rêyan de werdigihin, di navbera xwe wan dikareyan têne kontrol kirin.

Di herfendina dîvên dîmîna bêt-sayî de, ji dîvanên bi malîya neftan û bi hewa terîsandin ên dîvanên SF₆ û dîvanên bi vaku û her demê pirseka yekemîn di hatmanên teoriyên dîmînê de. Li wanê, dîvanên SF₆ dest pê wateyên paqijiyên dîmînê, endamên elektrîkî dike, astengîna barkirinê ya bikaranîn û darbixtinê, û li demên geran-hewa ya heyî yê jor ên bikaranîn.

Dîvanên SF₆ (li vir bêt-gehan dîvan) yan dîvên yekemîn hene di transmisyonê ya geran-hewa de. Astengîna barkirinê û guhertina dîmînê yekemîn îndikatorên teknîkî yên li ser ku dîvanên dîmîna bêt-sayî piştgirî dibin. Dîvanên SF₆ yek cûre ne dîvanên bi barkirîna gas û bi hewa, wan li gorî SF₆ gasê barkirin û dîmîn dide. SF₆ gasê barkirina berz û dike rekombinasyon bike, û nayê malîyên barkirî yên nahaqî hebe, wek carbon. Di demê ku çirkesiya suwê di kontrol be, rasteyên parvekerdine watan ne naxostin. Astengîna barkirinê ya SF₆ gasê li ser bikaranîn ne girdehat, tu li ser çend gihaniyên dîmînêda bêt-gehan astengîna barkirinê ya bibaxt.

Gasê SF₆ bêt-gehan yek medya barkirîna paqijî ye. Ji bo astengîna barkirinê û dîmînê ya bikaranîn, li sedsala 20ê me mafsalên elektrîkî ya geran-hewa û geran-hewa bêt-gehan bixweber. Hêli, SF₆ gasê yek medya barkirîna gasî ya bikaranîn e, veqetandin di demên geran-hewa û geran-hewa bêt-gehan de, wan yekemîn medya barkirin û dîmîn e. Ji bo piştguhartinên dîmînê ya bêt-gehan, SF₆ gasê di dîvan de divê 99.99% paqij bibe.

Li gav dîvanên SF₆, zev kanalên zêde û çend tarafên darbistin hene. Di seroperdan de, çunki tarafên darbistin û guhertina temperatur, dê probleman dike wanê ku SF₆ pressure ne çuk bas bibe. Di serokerdina girtin, ji bo faktorên wek vibrasyon û darbistin nebaz, ehtimala lêzdana gasê di dîvanan de dike bêt-gehan 1% ra ji rojekê hilbijart. Bûyer, dîvanan li ser wirin gasê bêt-gehan hewceyên lêz dan hene.

Vê gotarê yek cûre ne dîvanên SF₆ bêt-gehan bi deteksyon, gas fill, û gas supplementing tanpa disasembly taniyê. Bi alatên, divê mikro-mîneyan dîvanan û kalibrasyon density relays bikar bide bêt-gehan keseke şerbet ne. Divê heke lêzdana gas fill û gas supplementing, hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin hewl bidin h......

1 Cîhazên Niha li Çînê

Niha, cîhazên gas-supplementing li ser dîvanan dike tevî qabila bi bêt-gehan keseke şerbet ne. Divê yek cûre vane bi cîhaza kombînasyon bi dîvanan bêt-gehan lêz dan. Vana ku ji gorî body, interface, dîvan interface, û density relay interface têne rast kirin, divê bi mikro-mîneyan û density relay calibrator têne pêşkeftin. Vê çareseriya problemê ya keseke şerbet ne di demê ku mikro-mîneyan û density relay calibrator bikar bide, hewceyên keseke şerbet ne veqetandin û xasara dîvanan dike.

Bûyer, niha nayê çareseriyê ya lêzdana gas fill û gas supplementing di kanalên gas fill de. Di seroperdan de, SF₆ gas cylinder bi dîvanan bêt-gehan bi valve û hose têne lêz dan. Li vir heke SF₆ gas cylinder bi dîvanan bêt-gehan lêz dan, SF₆ gas ên air, moisture, û impurities ji hose têne lêz dan. Vê çendik astengîna SF₆ gasê girdehat, barkirina watan ne, dîvanan xasara dike, û jîyan watan ne.

Di navbera cîhazên elektrîkî ya geran-hewa de, guhertina SF₆ gasê rengkirina nahaqî û paqijiyên bike. Ji bo SF₆ circuit breakers, ji bo suwê ra dê ehtimala wanê ku paqijiyên toxîk bike, û wan dikareyan barkirinê, interrupting performance, û mechanical performance bike.

Niha, di demê ku mikro-mîneyan û density relay calibrator bikar bide, dîvanan bêt-gehan hewceyên disasembly bikar bide. Vê çareseriya production û darbistinê, û accuracy ya density relays bike.

2 Principle û Design

Cîhaza SF₆ circuit breaker detection, gas filling, û gas supplementing device ji gorî body, self-sealing valve, self-controlled back-pressure valve, û control switch têne rast kirin. Vê cîhaz body, self-sealing valve, self-controlled back-pressure valve, û control switch bi organikî têne pêşkeftin. Yek end body bi plate têne lêz dan, end din bi control switch têne lêz dan. Body bi self-sealing valve, self-controlled back-pressure valve, û density relay interface têne lêz dan. Control switch valves têne kontrol bikin.

Cîhaza SF₆ circuit breaker detection, gas filling, û gas supplementing device niha, bi organikî body, self-sealing valve, self-controlled back-pressure valve, û control switch têne pêşkeftin. Bi mikro-mîneyan, density relay calibration, û gas filling û gas supplementing operations bikar bide bêt-gehan keseke şerbet ne. Di demê ku gas filling û gas supplementing operations bikar bide, divê air, moisture, û impurities bi automatic têne lêz dan. Di demê ku gas filling û gas supplementing operations bikar bide, divê pressure detection û pressure-relief alarm têne pêşkeftin. Vê cîhaz bi voltage above 110 kV, Alstom FXT11-type circuit breakers from France, û domestic SF₆ circuit breakers with a voltage above 110 kV têne pêşkeftin. Vê cîhaz bi high pressure, ranging from 0.5 to 16 MPa, safe and reliable têne pêşkeftin.

Main Working Steps of the SF₆ Circuit Breaker Detection, Gas - Filling and Gas - Supplementing Device

• Remove Impure Gas: Connect the SF₆ gas cylinder to the self-sealing valve of this device through a pressure-reducing valve, a gas-supplementing hose, and a connector. Close the control switch and open the valve of the SF₆ gas cylinder. SF₆ gas enters the device through the gas-supplementing hose. At this time, impurities such as air in the pipe also enter the circuit breaker along with the SF₆ gas. The gas in the device is a mixture of SF₆ gas and air impurities. When the pressure in the device exceeds the set pressure of the self-controlled back-pressure valve, the self-controlled back-pressure valve automatically opens and discharges gas for 8-10 seconds. During this exhaust process, all the air and impurities in the entire system are removed. Then, close the valve of the SF₆ gas cylinder. When the pressure in the system is consistent with the set pressure, the self-controlled back-pressure valve automatically closes, completing the air and impurity removal operation. At this point, the purity of the SF₆ gas in the system is the same as that in the gas cylinder, and it is qualified gas.

• Gas - Filling and Pressure - Supplementing: With the entire system filled with pure SF₆ gas after the impurity removal process, open the control switch of this device, and then open the valve of the SF₆ gas cylinder to supplement gas to the circuit breaker. When the pressure in the circuit breaker exceeds the pressure set by the self-controlled back-pressure valve, the self-controlled back-pressure valve automatically opens, alarms, and discharges gas. At this time, close the valve of the SF₆ gas cylinder. When the pressure reaches the set value, the self-controlled back-pressure valve automatically closes, completing the gas-supplementing operation. After the operation is completed, remove the connector connected to the gas cylinder from the self-sealing valve of this device.

• Automatic Alarm and Pressure Control: During the gas-filling process, the self-controlled back-pressure valve plays a role in monitoring the pressure. Once the pressure exceeds the set value, it will automatically open, alarm, and discharge gas to ensure that the pressure in the circuit breaker does not exceed the safe range.

• Gas - Supplementing and Pressure Measurement: After the gas-supplementing operation, the pressure in the circuit breaker can be monitored to ensure that it reaches the required value.

When performing micro-water measurement, connect the micro-water measuring instrument to the self-sealing valve. Open the switch of the micro-water measuring instrument, allow the gas in the system to enter the micro-water measuring instrument, then close the switch of the measuring instrument for detection. After the detection, remove the micro-water measuring instrument to complete the micro-water measurement operation. There is no need to cut off the power during the detection process.

When performing density relay calibration, close the control switch of the device, connect the density calibrator to the self-sealing valve for calibration work. After the work is completed, remove the density calibrator and open the control switch. There is no need to cut off the power during the detection process.

The non-disassembly SF₆ circuit breaker detection, gas-filling and gas-supplementing device integrates micro-water measurement, density relay calibration, and gas-filling and gas-supplementing operations of the circuit breaker through instruments without power outages. Before gas-filling and gas-supplementing operations, it can automatically remove air, moisture, and impurities in the gas-supplementing system. During the gas-filling and gas-supplementing operations of the circuit breaker, it can achieve pressure detection and pressure-relief alarm. It is convenient and quick to operate and does not affect the normal operation of the circuit breaker.

3 Conclusion

The non-disassembly SF₆ circuit breaker detection, gas-filling and gas-supplementing device can completely remove air, moisture, and impurities in the gas-supplementing pipe and the system before gas-supplementing for the circuit breaker. Moreover, during the gas-filling process, when the gas pressure in the system reaches the rated value, it can automatically exhaust gas and alarm. This device is equipped with a system control switch, enabling micro-water measurement and density relay calibration operations without power outages. It is convenient and quick to operate and does not affect the normal operation of the circuit breaker. It is applicable to imported SF₆ circuit breakers with a voltage above 110 kV, Alstom FXT11-type circuit breakers from France, and domestic SF₆ circuit breakers with a voltage above 110 kV. It can withstand high pressure, ranging from 0.5 to 16 MPa, and is safe and reliable.