CN106710432B

CN106710432B - Fault simulation gas taking device in transformer

Info

Publication number: CN106710432B
Application number: CN201710130038.4A
Authority: CN
Inventors: 单锦宁; 姜宏; 王宇鹏; 金浩; 白天; 任伟; 颜廷武; 卜新良; 叶青
Original assignee: State Grid Fuxin Electric Power Supply Co; State Grid Corp of China SGCC
Current assignee: State Grid Fuxin Electric Power Supply Co; State Grid Corp of China SGCC
Priority date: 2017-03-07
Filing date: 2017-03-07
Publication date: 2022-12-30
Anticipated expiration: 2037-03-07
Also published as: CN106710432A

Abstract

The invention belongs to experimental equipment in the power industry, and particularly relates to a fault simulation gas taking device in a main transformer, wherein a simulation gas generating device (18) is fixedly arranged on the left side above the bottom surface of a tool cabinet (19), a frame-shaped upper support (8) is fixedly arranged above the tool cabinet (19), a gas collecting box (6) is fixedly arranged on the left side in the upper support (8), an oil tank (10) is fixedly arranged on the right side of the gas collecting box (6), a one-way valve (7) is arranged in the gas collecting box (6), the one-way valve (7) is connected with a gas guiding pipe (12), an oil drain valve (11) is arranged below the right side surface of the oil tank (10), the right side surface of a gas relay QG is communicated with the upper part of the oil tank (10) through an oil-gas pipeline (21), an oil conservator support (3) is fixedly arranged on the left side of the upper support (8), a simulation oil conservator (1) is fixedly arranged on the oil conservator support (3), an oil filling holes (1-1) are arranged on the simulation oil conservator (1), the device can improve the skill level of power transformation operation and maintenance personnel, reduce the risk factor of training or direct operation, the appearance, and is convenient to observe the appearance, and the appearance is beautiful.

Description

Fault simulation gas taking device in transformer

Technical Field

The invention belongs to experimental equipment in the power industry, and particularly relates to a fault simulation gas taking device in a main transformer.

Background

When the transformer normally works, the inside of the gas relay is filled with transformer oil. The internal air should be removed, and when the transformer fails during operation, transformer oil at the failure point is decomposed, and the generated gas is accumulated in the gas relay and makes the gas relay operate. In order to judge whether residual air is not discharged completely during maintenance or gas generated by internal faults, when the main transformer body is in gas protection action, a gas sample is taken for chromatographic analysis. The composition and content of these gases are one of the important criteria for determining whether or not a device is malfunctioning and the nature of the malfunction. In order to reduce the influence of different components with different dissolution rates, a gas sample is taken in the shortest possible time and analyzed as soon as possible, so as to judge the nature of the fault in the transformer and the severity, development speed and trend of the fault. However, for the light gas action of the on-load tap changer gas relay, gas sampling is not needed due to the fact that the on-load tap changer gas relay is completely different from the main transformer body in working condition, and the on-load tap changer gas relay can directly exhaust accumulated gas and reset signals. However, operation and maintenance personnel have low probability of actually encountering the event that gas is generated in the gas relay, the field training is difficult and high in danger, gas collection training work is rarely carried out actually, training is mainly based on theory, and the field operation capability is weak.

Disclosure of Invention

The invention aims to overcome the technical defects and provide the fault simulation gas taking device in the main transformer, which has the advantages of simple structure, small volume and convenient movement and operation.

The technical scheme adopted by the invention for solving the technical problem is as follows: the fault simulation gas taking device in the main transformer comprises a tool cabinet, a universal meter, a combined tool box, a gas taking pipe, an inverter power supply, a walking wheel, an upper support, an oil tank and a conservator support.

The invention has the beneficial effects that: the fault simulation gas taking device in the main transformer can greatly improve the skill level of power transformation operation and maintenance personnel and reduce the risk coefficient of field training or direct operation in the skill training process of workers in the power industry. This device has simulated the overall process of gas protection action, can satisfy the emulation rehearsal that transformer fortune dimension personnel got gas to gas relay and gas collection box, and the appearance is pleasing to the eye clean and tidy, and is small, observes conveniently, places the place and chooses the flexibility, can put indoor, greatly reduced the training degree of difficulty.

Drawings

The following detailed description is made with reference to the accompanying drawings.

Fig. 1 is a structural diagram of a fault simulation gas taking device in a main transformer.

Fig. 2 is a schematic circuit diagram of an analog gas extraction device.

In the figure 1-simulation conservator; 1-1-oil injection hole; 2-a circuit panel; 3-conservator bracket; 4-an oil pipeline; 5-hollow soft through pipe; 6-a gas collection box; 6-1-oil drain plug of gas collecting box; 7-a one-way valve; 8-upper support; 9-oil tank sealing cover; 10-a fuel tank; 10-1-oil tank access hole; 11-a fuel drain valve; 12-a bleed air pipe; 13-taking the trachea; 14-universal meter; 15-a combination tool box; 16-an inverter power supply; 17-a travelling wheel; 18-a simulated gas production device; 19-a tool cabinet; 20-gas conveying pipe; 21-an oil and gas pipeline; QG-gas relay; d1-heavy gas action lamp; d2-light gas action lamp; an F-buzzer; s-signal homing button.

Detailed Description

In the embodiment, referring to fig. 1, the fault simulation gas taking device in the main transformer is closed at the back, a frame-shaped upper support 8 is fixedly arranged above an open-front tool cabinet 19, a gas collecting box 6 is fixedly arranged at the left side in the upper support 8, an oil tank 10 is fixedly arranged at the right side of the gas collecting box 6, and the left side surface of the gas collecting box 6 is communicated with the upper part of a simulation gas generating device 18 through a joint and a gas conveying pipe 20. A one-way valve 7 is arranged in the gas collecting box 6, the one-way valve 7 is connected with a gas guide pipe 12 in an oil tank 10, and an oil drain valve 11 is arranged below the right side of the oil tank 10. And a gas relay QG is fixedly arranged above the upper bracket 8, the upper surface of the gas relay QG is communicated with the upper part of the gas collecting box 6 by a hollow soft through pipe 5, and the right side surface of the gas relay QG is communicated with the upper part of the oil tank 10 by an oil-gas pipeline 21. An oil tank access hole 10-1 is arranged above the oil tank 10, and an oil tank sealing cover 9 is arranged above the oil tank access hole 10-1. An oil conservator bracket 3 is fixedly arranged above the left side of the upper bracket 8, a simulation oil conservator 1 is fixedly arranged above the oil conservator bracket 3, and an oil filling hole 1-1 is arranged above the simulation oil conservator 1. The lower surface of the simulation conservator 1 is communicated with the left side surface of the gas relay QG through a hole arranged on the conservator bracket 3 by an oil conveying pipeline 4, a circuit panel 2 is fixed above the rear side of the upper bracket 8, and a heavy gas action lamp D1, a light gas action lamp D2, an alarm buzzer F and a signal homing button S are arranged at the upper right corner of the front of the circuit panel 2. An inverter power supply 16 is fixedly arranged on the rear side of the bottom surface of the tool cabinet 19, a combined tool box 15 and a universal meter 14 are arranged in front of the inverter power supply 16, and an air intake pipe 13 is arranged on the right side of the universal meter 14. The four corners of the bottom surface of the tool cabinet 19 are provided with traveling wheels 17.

Referring to fig. 2, the schematic diagram of the circuit in the circuit panel 2 includes: the gas relay QG, a heavy gas action lamp D1, a light gas action lamp D2, a buzzer F, switches K1 and K2 and a normally closed switch K; one ends of the switches K1 and K2 are connected with the positive electrode of the power supply and connected with the gas relay QG, the other ends of the switches K1 and K2 are respectively connected with one ends of the heavy gas action lamp D1 and the light gas action lamp D2, the other ends of the action lamps D1 and D2 are connected with a pin 1 of the buzzer F, a pin 2 of the buzzer F is connected with one end of the normally closed switch K, and the other end of the normally closed switch K is connected with the negative electrode of the power supply.

The working process of the fault simulation gas taking device in the main transformer is as follows: before the gas taking device is used, transformer oil needs to be injected from an oil injection hole 1-1 above the oil conservator 1, the transformer oil firstly enters a gas relay QG along an oil conveying pipeline 4 and then enters an oil tank 10 through an oil gas pipeline 21. When the oil level of the gas relay QG rises, an oil drain plug of the gas relay is opened until the oil drain plug discharges oil, the oil drain plug is closed, and when the oil level in the simulated oil conservator 1 rises to one third, the oil injection is stopped. And (3) opening the oil drain plug 6-1 of the gas-collecting box, introducing the transformer oil into the gas-collecting box 6, closing the oil drain plug 6-1 after the oil is discharged from the gas-introducing pipe 12, and completing the whole oil injection process. Then, simulating faults, connecting the device with an inverter power supply 16, turning on a switch of a simulated gas generating device 18, enabling gas to enter the oil tank 10 through the gas guide pipe 12, enabling a large amount of gas to be gathered at the top of the oil tank 10 and enter a gas relay QG through an oil-gas pipeline, enabling the oil level of the gas relay Q to drop, protecting light gas to act, enabling an action indicator lamp D2 to be on, and enabling a buzzer F to sound to give an alarm. And (3) unscrewing an oil drain plug at the lower part of the gas collecting box 6, opening an oil plug at the lower part of the gas collecting box 6, slowly discharging transformer oil in the gas collecting box 6, introducing gas in the gas relay QG into the gas collecting box 6, and when the gas guide pipe 12 continuously discharges oil, a light gas signal disappears and the oil level in the gas collecting box 6 begins to rise, indicating that no gas is accumulated in the gas relay QG, and closing the oil drain plug. Connect the syringe needle formula with emulsion tube one end when gas relay QG is gaseous to be gathered and get trachea 13, exhaust intraductal air, be connected the emulsion tube other end with the bleed valve, get the trachea 13 to the interior gaseous suction of gas relay QG. When the gas collection box 6 collects gas, the oil drain plug at the lower part of the gas collection box 6 is unscrewed, transformer oil in the gas collection box 6 is slowly discharged, the gas in the gas relay QG is led into the gas collection box 6, one end of the latex tube is connected with the gas taking tube 13, air in the latex tube is exhausted, the other end of the latex tube is connected with the air release valve, and the gas in the gas relay QG is slowly pressed into the gas taking tube 13 under the action of pressure. Two tubes of gas are taken, each tube takes 60 ml-80 ml of gas, one tube is used for operation and maintenance personnel to judge the fault property according to the gas color and the ignition test, and the other tube is sent to a professional department for gas detection.

Claims

1. A fault simulation gas taking device in a main transformer comprises a tool cabinet (19), a universal meter (14), a combined tool box (15), a gas taking pipe (13), an inverter power supply (16), traveling wheels (17), an upper support (8), an oil tank (10) and a conservator support (3), and is characterized in that a simulation gas generating device (18) is fixedly arranged on the left side above the bottom surface of the tool cabinet (19), a frame-shaped upper support (8) is fixedly arranged above the tool cabinet (19), a gas collecting box (6) is fixedly arranged on the left side in the upper support (8), the oil tank (10) is fixedly arranged on the right side of the gas collecting box (6), the left side surface of the gas collecting box (6) is communicated with the upper part of the simulation gas generating device (18) through a joint and a gas conveying pipe (20), a one-way valve (7) is arranged in the gas collecting box (6), the one-way valve (7) is connected with the oil pipe (12), the gas taking pipe (12) is arranged in the oil tank (10), the right side surface of the oil tank (10) is communicated with the upper part of the gas discharging valve (11), a gas collecting box (6) is arranged above the gas collecting box, a hollow relay support (5) is communicated with the upper part of a relay support (3) through a QG, and a relay (3) is arranged above a relay (3), the simulation conservator is fixed on the conservator support (3), an oil filling hole (1-1) is formed in the simulation conservator (1), the left side face of a gas relay QG is communicated with the lower face of the simulation conservator (1) through an oil conveying pipeline (4) for holes formed in the conservator support (3), a circuit panel (2) is fixed above the rear side of the upper support (8), and a heavy gas action lamp D1, a light gas action lamp D2, an alarm buzzer F and a signal homing button S are arranged at the upper right corner of the front of the circuit panel (2).