An on-line monitoring and analyzing system for gas relay

Abstract

This invention relates to the field of transformer monitoring, specifically disclosing an online monitoring and analysis system for a gas relay. A transformer tank is connected to a gas relay via a first pipe. The gas relay is connected to a gas collection unit, which is connected to a first gas detection unit. The gas collection unit collects gas from the gas relay and transmits it to the first gas detection unit for detection. A first collection chamber is connected to the first pipe via a second pipe, and a second collection chamber is connected to the first pipe via a third pipe. Both the first and second collection chambers can be connected to a monitoring unit via the first pipe. The monitoring unit monitors changes in the pressure and temperature of the gas from the first pipe. A second gas detection unit is connected to the first pipe via a fourth pipe for pre-detection of the gas within the first pipe. The gas collection unit, the first gas detection unit, the second gas detection unit, and the monitoring unit are all connected to a control unit.

Description

Technical Field

[0001] This invention belongs to the field of transformer monitoring technology, and specifically relates to an online monitoring and analysis system for a gas relay. Background Technology

[0002] Oil-immersed power transformers are one of the core pieces of equipment in power systems, and their safe and stable operation is crucial for ensuring the reliability of power supply and the stability of power transmission and distribution. Therefore, real-time online monitoring of transformer operating status and timely detection of internal faults are essential. The fault gases inside a transformer are closely related to the type of fault; analyzing the types and concentrations of these fault gases helps in understanding the transformer's operating status and fault information.

[0003] When a discharge fault occurs inside a transformer, the discharge arc causes the transformer oil to decompose, producing various characteristic gases such as methane, acetylene, hydrogen, carbon monoxide, carbon dioxide, ethylene, and ethane. The more severe the fault, the greater the amount of gas. The generated gas flows through a gas relay, causing the gas relay to issue an alarm signal, thus enabling the transformer to disconnect from the circuit. Traditional detection devices used with gas relays typically only start operating when a transformer fault occurs. While they can monitor the gas during and after a fault, they cannot collect data on changes during normal transformer operation or when the oil and gas inside the transformer are fluctuating.

[0004] The above background information is provided only to aid in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The purpose of this invention is to provide an online monitoring and analysis system for gas relays to solve the problem that traditional transformer oil and gas detection devices cannot monitor changes in oil and gas inside transformers in real time.

[0006] To achieve the above objectives, the present invention provides an online monitoring and analysis system for a gas relay, the online monitoring and analysis system comprising a transformer oil tank, a gas relay, a gas collection unit, a first gas detection unit, a second gas detection unit, a control unit, a monitoring unit, a first collection chamber and a second collection chamber, a first pipe, a second pipe, a third pipe and a fourth pipe;

[0007] The transformer oil tank is connected to the gas inlet of the gas relay through the first pipe, and the gas outlet of the gas relay is connected to the gas collection unit. The gas collection unit is connected to the first gas detection unit, wherein the gas collection unit is used to collect gas from the gas relay and transmit it to the first gas detection unit for detection.

[0008] The first collection chamber is connected to the first pipe via the second pipe, and the second collection chamber is connected to the first pipe via the third pipe. The first collection chamber and the second collection chamber can be connected to the monitoring unit via the first pipe. The monitoring unit is used to monitor the pressure and temperature changes of the gas from the first pipe. The second gas detection unit is connected to the first pipe via the fourth pipe and is used to pre-detect the gas in the first pipe.

[0009] The gas collection unit, the first gas detection unit, the second gas detection unit, and the monitoring unit are all connected to the control unit.

[0010] Preferably, in the above technical solution, the gas collection unit includes an oil-gas separation component, an oil storage tank, and a gas storage tank. The input end of the oil-gas separation component is connected to the gas outlet of the gas relay. The output end of the oil-gas separation component is divided into two paths and connected to the oil storage tank and the gas storage tank respectively. The gas storage tank is connected to the first gas detection unit.

[0011] Preferably, in the above technical solution, the oil-gas separation component includes a semi-permeable membrane separator.

[0012] Preferably, in the above technical solution, the first collecting chamber is a piston collecting pipe, and the piston collecting pipe and the second pipe are connected to each other through a sealing kit. The sealing kit includes a first connecting plate, a rotary valve plate, and a second connecting plate. The first connecting plate is disposed at one end of the second pipe, and has a first semi-circular channel and an annular groove. The rotary valve plate has an annular strip on its edge that slides with the annular groove, and has a second semi-circular channel. The second connecting plate is connected to the first connecting plate by screws, and the rotary valve plate is slidably disposed between the first connecting plate and the second connecting plate.

[0013] The rotary valve plate is vertically provided with a connecting rod for insertion into the piston collecting tube, and the second connecting plate is provided with an arc-shaped groove for the connecting rod to slide through. The connecting rod passes through the arc-shaped groove and is disposed in the second connecting plate; the second connecting plate is provided with a mating hole.

[0014] Preferably, in the above technical solution, the piston collecting pipe includes a piston cylinder, a piston, a connecting handle, and a docking pipe; one end of the docking pipe is connected to the docking hole, and the other end is connected to the piston cylinder, and a manual valve is provided on the docking pipe; the piston is slidably disposed inside the piston cylinder; the connecting handle is fixedly disposed on the outer wall of the piston cylinder, and a connecting hole that cooperates with the connecting rod is provided on the connecting handle.

[0015] Preferably, in the above technical solution, the first pipeline is provided with a first solenoid valve, the second pipeline is provided with a second solenoid valve, the third pipeline is provided with a third solenoid valve, and the fourth pipeline is provided with a fourth solenoid valve. The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all controlled by the control unit.

[0016] Preferably, in the above technical solution, the first pipeline is provided with a nitrogen tank for cleaning and monitoring pipeline. The nitrogen tank is connected to the first pipeline through a fifth pipeline. The fifth pipeline is provided with a fifth solenoid valve. The fifth solenoid valve is also connected to the control unit and controlled by the control unit. One end of the fifth pipeline is connected between the first solenoid valve and the gas relay.

[0017] Preferably, in the above technical solution, the monitoring unit includes a pressure sensor and a temperature sensor; the pressure sensor is used to monitor pressure changes inside the first pipe, and the temperature sensor is used to monitor temperature changes inside the first pipe.

[0018] Preferably, in the above technical solution, the first gas detection unit includes an infrared spectrometer.

[0019] Compared with existing technologies, the present invention has the following advantages:

[0020] This invention provides an online monitoring and analysis system for a gas relay. The system includes a transformer tank, a gas relay, a gas collection unit, a first gas detection unit, a second gas detection unit, a control unit, a monitoring unit, a first collection chamber, a second collection chamber, a first pipe, a second pipe, a third pipe, and a fourth pipe. The first gas detection unit is connected to the gas collection unit, and the gas collected by the gas collection unit originates from the transformer tank and passes through the gas relay. The first detection unit detects the gas collected by the gas collection unit. The monitoring unit can detect the temperature and pressure of the gas through the first pipe connected to the first and second collection chambers, while the second detection unit can perform pre-detection of the gas in the first pipe. The gas collection unit, the first gas detection unit, the second gas detection unit, and the monitoring unit are all connected to the control unit, which can thus monitor the normal operation of the transformer and promptly detect transformer faults. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the online monitoring and analysis system for the gas relay of the present invention.

[0022] Figure 2 This is a schematic diagram of the second pipe, sealing kit, and piston collecting pipe structure in this invention.

[0023] Figure 3 In this invention Figure 2 Another perspective diagram.

[0024] Explanation of key figure labels:

[0025] 1. First connecting plate; 10. Annular groove; 11. First semi-circular channel; 2. Rotary valve plate; 20. Second semi-circular channel; 21. Connecting rod; 22. Annular bar; 3. Second connecting plate; 30. Arc groove; 31. Docking hole; 40. Piston cylinder; 41. Piston; 42. Connecting handle; 43. Docking pipe; 44. Connecting hole; 5. Second pipe. Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "top surface," "bottom surface," "inner," "outer," "inner side," and "outer side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0030] like Figure 1 As shown, this embodiment of the invention provides an online monitoring and analysis system for a gas relay, including a transformer oil tank, a gas relay, a gas collection unit, a first gas detection unit, a second gas detection unit, a control unit, a monitoring unit, a first collection chamber, and a second collection chamber. The gas relay is connected to the transformer oil tank via a first pipe. The gas relay is sequentially connected to the gas collection unit and the first gas detection unit via pipes. The gas collection unit, the first gas detection unit, the second gas detection unit, and the monitoring unit are all signal-connected to the control unit. The first collection chamber is connected to the first pipe via a second pipe 5, and the second collection chamber is connected to the first pipe via a third pipe. The second gas detection unit is connected to the first pipe via a fourth pipe.

[0031] The monitoring unit includes a pressure sensor and a temperature sensor. The pressure sensor monitors pressure changes inside the first pipe, and the temperature sensor monitors temperature changes inside the first pipe. Both the pressure and temperature sensors are controlled by the control unit and are always operational. When the transformer is not faulty, the pressure sensor constantly monitors pressure fluctuations inside the transformer tank. When abnormal fluctuations occur, the control unit will control the corresponding alarm unit to issue a pre-alarm in the form of an electrical signal to remind the transformer that it is currently in a state of potential safety hazard. When a fault occurs, the pressure and temperature sensors will output data intermittently for a certain period of time under the control of the control unit. The data will be analyzed by the corresponding computer system to determine the trend of pressure or temperature changes, to judge the duration of the fault, and to provide an assessment of whether there is a risk of the fault worsening. Based on this assessment, a decision will be made on whether to disconnect the transformer or whether personnel can collect gas at close range for maintenance.

[0032] In addition, a second gas detection unit is directly installed on the first pipeline. While issuing a pre-alarm, the second gas detection unit will directly perform a pre-detection of the gas in the first pipeline to preliminarily determine whether the gas composition is consistent with the methane, acetylene, hydrogen, carbon monoxide and other gases produced by the decomposition of transformer oil.

[0033] The first pipe is equipped with a first solenoid valve, the second pipe 5 is equipped with a second solenoid valve, the third pipe is equipped with a third solenoid valve, and the fourth pipe is equipped with a fourth solenoid valve. Each solenoid valve is controlled by a control unit, and the feedback data from the corresponding sensor is used as the basis for whether to take action.

[0034] The gas collection unit includes an oil-gas separation component, an oil storage tank, and a gas storage tank. The oil-gas separation component is interconnected with the outlet of a gas relay via pipelines. The oil-gas separation component is also interconnected with the oil storage tank and the gas storage tank via pipelines. The gas storage tank is connected to the first gas detection unit. In the event of a fault, oil and gas enter the gas relay, triggering a light gas operation. When the fault is relatively severe, oil and gas flow from the gas relay through pipelines into the oil-gas separation component. In this embodiment, the oil-gas separation component includes a semi-permeable membrane separator, which can separate oil and gas to avoid affecting subsequent detection of gas type and content.

[0035] In this embodiment, the first gas detection unit includes an infrared spectrometer, and the separated gas can enter the detection chamber of the infrared spectrometer to detect the gas components; the second gas detection unit has the same structure and principle as the first gas detection unit.

[0036] The first pipeline is equipped with a nitrogen tank for cleaning and monitoring pipelines. The nitrogen tank is connected to the first pipeline via a fifth pipeline. The fifth pipeline is equipped with a fifth solenoid valve, and one end of the fifth pipeline is connected between the first solenoid valve and the gas relay. After each fault, there will be a certain amount of oil and gas in the gas relay and the corresponding pipelines. In order to avoid affecting the normal triggering of the gas relay in the next fault, a nitrogen tank is connected to the first pipeline. Nitrogen is blown into the gas relay and the corresponding pipelines to remove the residual oil and gas as much as possible.

[0037] like Figures 2 to 3 As shown, in this embodiment, the first collecting chamber is a piston collecting pipe, which is connected to the second pipe 5 via a sealing kit. The sealing kit includes a first connecting plate 1, a rotary valve plate 2, and a second connecting plate 3. The first connecting plate 1 is located at one end of the second pipe 5. The first connecting plate 1 has a first semi-circular channel 11 and an annular groove 10. The rotary valve plate 2 has an annular strip 22 on its edge that slides with the annular groove 10, and a second semi-circular channel 20 on its edge. The second connecting plate 3 is connected to the first connecting plate 1 via screws. The rotary valve plate 2 is slidably disposed between the first connecting plate 1 and the second connecting plate 3. A connecting rod 21 is vertically provided for insertion into the piston collecting tube. An arc-shaped groove 30 is provided on the second connecting plate 3 for the connecting rod 21 to slide through. The connecting rod 21 passes through the arc-shaped groove 30 and is positioned within the second connecting plate 3. A docking hole 31 is provided on the second connecting plate 3. The piston collecting tube includes a piston cylinder 40, a piston 41, a connecting handle 42, and a docking pipe 43. One end of the docking pipe 43 is connected to the docking hole 31, and the other end is connected to the piston cylinder 40. A manual valve is provided on the docking pipe 43. The piston 41 is slidably disposed inside the piston cylinder 40. The connecting handle 42 is fixedly disposed on the outer wall of the piston cylinder 40, and a connecting hole 44 is provided on the connecting handle 42 to mate with the connecting rod 21. The structure and connection method of the second collecting chamber are the same as those of the first collecting chamber, and will not be described further here.

[0038] When collecting gas, the connecting pipe 43 of the piston collecting tube is pressed and connected to the interface, ensuring that the connecting hole 44 on the connecting handle 42 mates with the connecting rod 21. Then, the entire piston collecting tube is rotated until the first semicircular channel 11 and the second semicircular channel 20 overlap. The manual valve on the connecting pipe 43 is then opened, followed by the second solenoid valve. Gas will gradually enter the piston collecting tube, and the piston 41 within it will move outwards under the influence of the gas, ultimately completing the collection. To close the tube, first close the manual valve, then rotate the entire piston collecting tube to completely displace the first semicircular channel 11 and the second semicircular channel 20. Next, close the second solenoid valve and finally remove the piston collecting tube to complete the collection. This structure can reduce the amount of gas escaping into the air to a certain extent, preventing some harmful gases from polluting the environment.

[0039] When the pressure difference in the transformer tank is large, the control unit will control the opening and closing of the second and third solenoid valves to collect the gas under two different pressure states into different collection chambers. Then, through subsequent gas component analysis, the order of gas generation during the fault process can be determined, and based on this, the accuracy of the pre-alarm and pre-detection mechanisms can be further improved.

[0040] In summary, this invention provides an online monitoring and analysis system for a gas relay. This system includes a transformer tank, a gas relay, a gas collection unit, a first gas detection unit, a second gas detection unit, a control unit, a monitoring unit, a first collection chamber, a second collection chamber, a first pipe, a second pipe, a third pipe, and a fourth pipe. The first gas detection unit is connected to the gas collection unit, and the gas collected by the gas collection unit originates from the transformer tank and passes through the gas relay. The first detection unit detects the gas collected by the gas collection unit. The monitoring unit can detect the temperature and pressure of the gas through the first pipe connected to the first and second collection chambers, while the second detection unit can perform pre-detection of the gas in the first pipe. The gas collection unit, the first gas detection unit, the second gas detection unit, and the monitoring unit are all connected to the control unit, which can thus monitor the normal operation of the transformer and promptly detect transformer faults.

[0041] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. An on-line monitoring and analysis system for gas relays, characterized by: The system includes a transformer oil tank, a gas relay, a gas collection unit, a first gas detection unit, a second gas detection unit, a control unit, a monitoring unit, a first collection chamber, a second collection chamber, a first pipe, a second pipe, a third pipe, and a fourth pipe. The transformer oil tank is connected to the gas relay's inlet via the first pipe. The gas relay's outlet is connected to the gas collection unit. The gas collection unit is connected to the first gas detection unit. The gas collection unit collects gas from the gas relay and transmits it to the first gas detection unit for detection. The gas collection unit includes an oil-gas separation component, an oil storage tank, and a gas storage tank. The input end of the oil-gas separation component is connected to the gas relay's outlet, and the output end of the oil-gas separation component is split into two paths, connected to the oil storage tank and the gas storage tank respectively. The gas storage tank is connected to the first gas detection unit; the first collection chamber is connected to the first pipe via the second pipe, and the second collection chamber is connected to the first pipe via the third pipe. The control unit controls the opening and closing of the second and third solenoid valves to collect gases under two different pressure states into different collection chambers, and the sequence of gas generation during the fault is determined by subsequent gas component analysis; the monitoring unit is used to monitor the pressure and temperature changes of the gas from the first pipe; the second gas detection unit is connected to the first pipe via the fourth pipe and is used to pre-detect the gas in the first pipe; wherein, the gas collection unit, the first gas detection unit, the second gas detection unit, and the monitoring unit are all connected to the control unit.

2. The on-line monitoring and analyzing system of a gas relay according to claim 1, characterized in that, The oil-gas separation assembly includes a semi-permeable membrane separator.

3. The on-line monitoring and analyzing system of gas relay according to claim 1, characterized in that, The first collecting chamber is a piston collecting pipe, which is connected to the second pipe via a sealing kit. The sealing kit includes a first connecting plate, a rotary valve plate, and a second connecting plate. The first connecting plate is located at one end of the second pipe and has a first semi-circular channel and an annular groove. The rotary valve plate has an annular strip on its edge that slides with the annular groove and a second semi-circular channel. The second connecting plate is connected to the first connecting plate via screws, and the rotary valve plate is slidably disposed between the first and second connecting plates. The rotary valve plate is vertically provided with a connecting rod for insertion into the piston collecting tube, and the second connecting plate is provided with an arc-shaped groove for the connecting rod to slide through. The connecting rod passes through the arc-shaped groove and is disposed in the second connecting plate; the second connecting plate is provided with a mating hole.

4. The on-line monitoring and analyzing system of a gas relay according to claim 3, characterized in that, The piston collecting tube includes a piston cylinder, a piston, a connecting handle, and a docking pipe; one end of the docking pipe is connected to the docking hole, and the other end is connected to the piston cylinder, and a manual valve is provided on the docking pipe; the piston is slidably disposed inside the piston cylinder; the connecting handle is fixedly disposed on the outer wall of the piston cylinder, and a connecting hole that cooperates with the connecting rod is provided on the connecting handle.

5. The on-line monitoring and analyzing system of gas relay according to claim 1, characterized in that, The first pipeline is equipped with a first solenoid valve, the second pipeline is equipped with a second solenoid valve, the third pipeline is equipped with a third solenoid valve, and the fourth pipeline is equipped with a fourth solenoid valve. The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all controlled by the control unit.

6. The on-line monitoring and analyzing system of a gas relay according to claim 5, wherein, The first pipeline is equipped with a nitrogen tank for cleaning and monitoring pipelines. The nitrogen tank is connected to the first pipeline through a fifth pipeline. The fifth pipeline is equipped with a fifth solenoid valve, which is also connected to and controlled by the control unit. One end of the fifth pipeline is connected between the first solenoid valve and the gas relay.

7. The on-line monitoring and analyzing system of gas relay according to claim 1, characterized in that, The monitoring unit includes a pressure sensor and a temperature sensor; the pressure sensor is used to monitor pressure changes inside the first pipe, and the temperature sensor is used to monitor temperature changes inside the first pipe.

8. The online monitoring and analysis system for a gas relay according to claim 1, characterized in that, The first gas detection unit includes an infrared spectrometer.

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