Oil chromatography online monitoring system device for transformer oil

Abstract

An oil chromatography online monitoring system device for transformer oil is characterized in that a hydrogen sensor (2), a temperature sensor (3), a pressure sensor (4), a flow sensor (5) and an oil pump (6) are respectively arranged on a first tube shell (1), a flow stabilizing valve (8) and a three-way joint (9) are respectively arranged on a second tube shell (7), and a first control valve (91) is arranged between the second tube shell (7) and the first tube shell (1); and a second control valve (92) is arranged between the three-way joint (9) and the oil chromatography online monitor (93), so that the fault transformer can be selected and distinguished according to a single fault gas content signal; the technical problem that the running state of the transformer is diagnosed and analyzed by monitoring the content of fault gas such as hydrogen, carbon monoxide, methane, ethylene, ethane, acetylene and carbon dioxide dissolved in oil through oil chromatography online monitoring is solved, and therefore the online monitoring effect of the terminal transformer is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil chromatogram on -line monitoring device especially an oil chromatogram on -line monitoring system device for transformer oil liquid. BACKGROUND

[0002] The oil chromatogram on -line monitoring discovers and diagnoses the internal fault of transformer through the content and change trend of fault gas in transformer oil, provides important data for real -time grasping the operation state of transformer, is the important equipment of guaranteeing the safe and economic operation of transformer and power grid system, therefore is an important transformer use device for the oil chromatogram on -line monitoring device for transformer oil liquid, in the prior art oil chromatogram on -line monitoring device for transformer oil liquid, there is no oil chromatogram on -line monitoring system device for transformer oil liquid, still all are by oil chromatogram on -line monitoring through monitoring the content of dissolved hydrogen gas, carbon monoxide, methane, ethylene, ethane, acetylene, carbon dioxide etc.

[0003] Cannot detect the sudden discharge and other defects in time, can cause the malignant fault of transformer to develop, causes the major economic loss.

[0004] The oil gas on -line monitoring device takes sample through the interface valve fixed point, and the fault gas concentration diffuses slowly, if the fault point is far away from the sampling point, the fault diagnosis effect is lag, the monitoring effect of sudden fault of transformer is poor,

[0005] The utility model discloses a single fault gas content signal is selected to the transformer of distinguishing the technical features of the technical problem that all are by oil chromatogram on -line monitoring through monitoring the content of dissolved hydrogen gas, carbon monoxide, methane, ethylene, ethane, acetylene, carbon dioxide etc. SUMMARY

[0006] The utility model discloses a kind of oil chromatogram on -line monitoring system devices for transformer oil liquid.

[0007] In order to overcome the above technical defects, the utility model aims at providing an oil chromatogram on-line monitoring system device for transformer oil liquid, thereby improving the on-line monitoring effect of the transformer.

[0008] The utility model discloses a kind of oil chromatography online monitoring system devices for transformer oil, including first control valve for being used as intermediate valve, first pipe shell being arranged between first control valve and transformer oil storage tank, second pipe shell group being arranged between first control valve and transformer oil storage tank, hydrogen sensor being arranged on first pipe shell.

[0009] Since first control valve, first pipe shell, second pipe shell and hydrogen sensor are designed, through first control valve, it realizes that first pipe shell and second pipe shell are controlled between open and close, through second pipe shell, it realizes that transformer oil in transformer oil storage tank is output, through first pipe shell, it realizes that output transformer oil from transformer oil storage tank is mixed and transported, through hydrogen sensor, it realizes that the hydrogen content signal of mixed transformer oil is picked up, realizes that single fault gas content signal is selected and distinguished to transformer fault, solves the technical problem that transformer running state is diagnosed and analyzed by monitoring dissolved hydrogen, carbon monoxide, methane, ethylene, ethane, acetylene, carbon dioxide and other fault gas content in oil chromatography online monitoring, thus improve the online monitoring effect of end transformer.

[0010] The utility model discloses a design, according to the mode that single fault gas content signal is selected and distinguished to transformer fault, first control valve, first pipe shell, second pipe shell and hydrogen sensor are connected with each other.

[0011] The utility model discloses a design, according to the mode that the hydrogen content signal of mixed transformer oil is picked up, hydrogen sensor is connected with first control valve, first pipe shell and second pipe shell.

[0012] The technical effect of the above three technical schemes is that: single fault gas content value is continuously monitored, monitoring time is shortened, response performance to transformer fault is improved, the technical feature that single fault gas content signal is selected and distinguished to transformer fault is highlighted, and the application in the technical field of oil chromatography online monitoring system device for transformer oil is introduced.

[0013] The utility model discloses a design, still including first accessory device and first accessory device setting is on first pipe shell, first accessory device setting is including flow sensor and oil pump.

[0014] The utility model discloses a design, still including second accessory device and second accessory device setting is on first pipe shell, second accessory device setting is including temperature sensor and pressure sensor.

[0015] The utility model discloses a design, still including third accessory device and third accessory device setting is on second pipe shell, third accessory device setting is steady flow valve.

[0016] The utility model discloses a still contain fourth accessory device and fourth accessory device set up on the second pipe shell, fourth accessory device set up as contain three -way joint, second control valve and oil chromatogram on -line monitoring.

[0017] The technical effects of the above four technical solutions are that the integration installation of other components is realized, and the technical effects of the utility model are expanded.

[0018] The utility model discloses a set up hydrogen sensor, temperature sensor, pressure sensor, flow sensor and oil pump respectively on the first pipe shell, set up steady flow valve and three -way joint on the second pipe shell and set up first control valve between the second pipe shell and the first pipe shell, set up second control valve between three -way joint and oil chromatogram on -line monitoring.

[0019] The technical effects of the above technical solutions are that the first pipe shell, hydrogen sensor, temperature sensor, pressure sensor, flow sensor, oil pump, second pipe shell, steady flow valve, three -way joint, first control valve, second control valve and oil chromatogram on -line monitoring are combined to form the basic technical solution of the utility model, and the technical problems of the utility model are solved.

[0020] The utility model discloses a set up hydrogen sensor, temperature sensor, pressure sensor, flow sensor and oil pump respectively on the first pipe shell, set up steady flow valve and three -way joint on the second pipe shell and set up first control valve between the second pipe shell and the first pipe shell, set up second control valve between three -way joint and oil chromatogram on -line monitoring.

[0021] The utility model discloses a set up hydrogen sensor, temperature sensor, pressure sensor, flow sensor and oil pump respectively on the first pipe shell, set up steady flow valve and three -way joint on the second pipe shell and set up first control valve between the second pipe shell and the first pipe shell, set up second control valve between three -way joint and oil chromatogram on -line monitoring.

[0022] The utility model discloses a set up hydrogen sensor, temperature sensor, pressure sensor, flow sensor and oil pump respectively on the first pipe shell, set up steady flow valve and three -way joint on the second pipe shell and set up first control valve between the second pipe shell and the first pipe shell, set up second control valve between three -way joint and oil chromatogram on -line monitoring.

[0023] The technical effects of the above three technical solutions are that the branch type pipe body that can control the opening and closing is realized, and the transformer oil liquid is realized single -pipe collection delivery.

[0024] The utility model discloses, hydrogen sensor sets up as palladium alloy hydrogen sensor and the shell of hydrogen sensor sets up with first pipe shell coupling, the contact of hydrogen sensor sets up with first pipe shell sinking type coupling and the output interface of hydrogen sensor sets up with the input interface connection of data processing computer.

[0025] The technical effect of the above technical scheme is that the hydrogen gas amount signal in the transformer oil is picked up.

[0026] The utility model discloses, flow sensor sets up as quantity core type flow sensor and the shell of flow sensor sets up with first pipe shell coupling, the contact of flow sensor sets up with first pipe shell sinking type coupling and the output interface of flow sensor sets up with the input interface connection of PLC controller.

[0027] The utility model discloses, oil pump sets up as the oil pump with control motor and the port of oil pump sets up with first pipe shell embedded type coupling, and the control port of oil pump sets up with the output interface connection of PLC controller.

[0028] The technical effect of the above two technical schemes is that the transformer oil in the single pipe collection and delivery is in a stable state.

[0029] The utility model discloses, temperature sensor sets up as contact type temperature sensor and the shell of temperature sensor sets up with first pipe shell coupling, the contact of temperature sensor sets up with first pipe shell sinking type coupling and the output interface of temperature sensor sets up with the input interface connection of data processing computer.

[0030] The utility model discloses, pressure sensor sets up as absolute pressure sensor and the shell of pressure sensor sets up with first pipe shell coupling, the contact of pressure sensor sets up with first pipe shell sinking type coupling and the output interface of pressure sensor sets up with the input interface connection of data processing computer.

[0031] The technical effect of the above two technical schemes is that the hydrogen content value in the transformer oil is picked up by temperature and pressure correction signals.

[0032] The utility model discloses, steady flow valve sets up as the system balance steady flow valve with one -way flow and the port of steady flow valve sets up with second pipe shell embedded type coupling.

[0033] The technical effect of the above technical scheme is that the transformer oil in the second pipe shell group is in a balanced state.

[0034] This utility model designs a tee connector that is configured as a positive tee, with the first interface of the tee connector being configured to be connected to the transformer oil storage tank, the second interface of the tee connector being configured to be connected to the second pipe shell, and the third interface of the tee connector being configured to be connected to the second control valve.

[0035] This utility model is designed such that the second control valve is configured as a multi-way control valve and the input interface of the second control valve is configured to be connected to a three-way connector, and the output interface of the second control valve is configured to be connected to an online oil chromatography monitoring system.

[0036] This utility model designs an online oil chromatography monitoring device for transformer oil, and sets the oil injection port of the online oil chromatography monitoring device to be connected in a manner that communicates with the second control valve.

[0037] The technical effect of the above three technical solutions is that they enable online monitoring of the content of other fault gases in transformer oil.

[0038] This utility model is designed such that the first pipe shell and hydrogen sensor are distributed with the second pipe shell, tee connector and first control valve in a way that monitors at the main pipe; the first pipe shell, hydrogen sensor, second pipe shell, tee connector and first control valve are distributed with the second control valve and oil chromatograph online monitoring in a way that monitors at the branch pipe; the first pipe shell, hydrogen sensor, second pipe shell, tee connector and first control valve are distributed with temperature sensor and pressure sensor in a way that monitors correction parameters; the first pipe shell, hydrogen sensor, second pipe shell, tee connector and first control valve are distributed with flow sensor and oil pump in a way that promotes dynamic flow; and the first pipe shell, hydrogen sensor, second pipe shell, tee connector and first control valve are distributed with flow stabilizing valve in a way that balances flow.

[0039] This utility model is designed such that a second tube shell, a flow stabilizing valve and a three-way connector are configured to form a set of separate pipe components, and the multiple sets of separate pipe components are set on the first control valve. The separate pipe components are arranged to be distributed corresponding to the transformer oil storage tank.

[0040] The technical advantages of this invention are as follows: Multiple sampling ports are set up, and samples from multiple locations are aggregated to a single palladium alloy sensor for real-time continuous hydrogen detection. During normal operation of the multi-component online monitoring system, samples are taken sequentially from the multiple sampling ports according to a set cycle. When the real-time hydrogen content or growth rate exceeds a set value, the system immediately activates multi-component online monitoring. Based on the sampling data from each point, the fault range is determined, and after identifying the fault location, continuous multi-component detection at the fault location is performed at the minimum cycle until the fault is eliminated. This effectively reduces the fault diagnosis response time. The device has a self-test function; if the hydrogen data deviation between real-time hydrogen detection and multi-component detection exceeds 10%, an abnormal data alarm signal is issued.

[0041] In this technical solution, the single fault gas content signal used to select and distinguish faulty transformers by a single fault gas content signal is realized by a hydrogen sensor.

[0042] In this technical solution, the first control valve, the first shell, the second shell, and the hydrogen sensor, which use a single fault gas content signal to select and distinguish faulty transformers, are important technical features. In the technical field of online oil chromatography monitoring system for transformer oil, this solution is novel, inventive, and practical. The terminology used in this technical solution can be explained and understood using patent literature in this technical field. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of one of the first embodiments of an online oil chromatography monitoring system for transformer oil according to the present invention.

[0045] First shell-1, hydrogen sensor-2, temperature sensor-3, pressure sensor-4, flow sensor-5, oil pump-6, second shell-7, flow stabilizing valve-8, tee connector-9, first control valve-91, second control valve-92, online oil chromatograph monitoring-93. Detailed Implementation

[0046] According to the examination guidelines, terms such as “having,” “comprising,” and “including” used in this invention should be understood as not dispensing the presence or addition of one or more other elements or combinations thereof.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are all commercially available. If the processing conditions are not explicitly stated, please refer to the product manual or follow the conventional methods in the field.

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] Figure 1 This is one of the first embodiments of the present invention. The embodiment is described in detail with reference to the accompanying drawings. It includes a first housing 1, a hydrogen sensor 2, a temperature sensor 3, a pressure sensor 4, a flow sensor 5, an oil pump 6, a second housing 7, a flow stabilizing valve 8, a three-way connector 9, a first control valve 91, a second control valve 92, and an online oil chromatograph monitor 93. The first housing 1 is equipped with the hydrogen sensor 2, temperature sensor 3, pressure sensor 4, flow sensor 5, and oil pump 6. The second housing 7 is equipped with the flow stabilizing valve 8 and the three-way connector 9. The first control valve 91 is located between the second housing 7 and the first housing 1. The second control valve 92 is located between the three-way connector 9 and the online oil chromatograph monitor 93.

[0052] The second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0053] In this embodiment, the first housing 1 is configured as a pipe, and one port of the first housing 1 is configured to be connected to the first control valve 91. The cross-sectional port of the other port of the first housing 1 is configured to be connected to the oil pump 6, and the other port of the first housing 1 is configured to be connected to the transformer oil storage tank. The pipe wall of the first housing 1 is configured to be connected to the housing of the hydrogen sensor 2, the housing of the temperature sensor 3, the housing of the pressure sensor 4, and the housing of the flow sensor 5, respectively. The first housing 1 is configured to be accommodatingly connected to the contacts of the hydrogen sensor 2, the contacts of the temperature sensor 3, the contacts of the pressure sensor 4, and the contacts of the flow sensor 5, respectively.

[0054] The first housing 1 forms a support connection point for the hydrogen sensor 2, temperature sensor 3, pressure sensor 4, flow sensor 5, oil pump 6, and first control valve 91. The first housing 1 enables connection to the hydrogen sensor 2, temperature sensor 3, pressure sensor 4, flow sensor 5, oil pump 6, and first control valve 91. Its technical purpose is to serve as a support carrier for the hydrogen sensor 2, temperature sensor 3, pressure sensor 4, flow sensor 5, and oil pump 6.

[0055] In this embodiment, the hydrogen sensor 2 is configured as a palladium alloy hydrogen sensor, and the housing of the hydrogen sensor 2 is configured to be connected to the first tube shell 1. The contacts of the hydrogen sensor 2 are configured to be submerged and connected to the first tube shell 1, and the output interface of the hydrogen sensor 2 is configured to be connected to the input interface of the data processing computer.

[0056] The hydrogen sensor 2 forms a support connection point for the first tube shell 1. The connection between the hydrogen sensor 2 and the first tube shell 1 is realized. Its technical purpose is to serve as a component for picking up the hydrogen content signal in the transformer oil.

[0057] In this embodiment, the temperature sensor 3 is configured as a contact temperature sensor, and the housing of the temperature sensor 3 is configured to be connected to the first tube shell 1. The contact of the temperature sensor 3 is configured to be recessed into the first tube shell 1, and the output interface of the temperature sensor 3 is configured to be connected to the input interface of the data processing computer.

[0058] The temperature sensor 3 forms a support connection point for the first shell 1. The connection between the temperature sensor 3 and the first shell 1 is achieved. Its technical purpose is to serve as a component for picking up the temperature signal of the transformer oil.

[0059] In this embodiment, the pressure sensor 4 is configured as an absolute pressure sensor, and the housing of the pressure sensor 4 is configured to be connected to the first tube housing 1. The contacts of the pressure sensor 4 are configured to be submerged in connection with the first tube housing 1, and the output interface of the pressure sensor 4 is configured to be connected to the input interface of the data processing computer.

[0060] The pressure sensor 4 forms a support connection point for the first shell 1. The connection between the pressure sensor 4 and the first shell 1 is achieved. Its technical purpose is to serve as a component for picking up the pressure signal of the transformer oil.

[0061] In this embodiment, the flow sensor 5 is configured as a core-type flow sensor, and the housing of the flow sensor 5 is configured to be connected to the first tube housing 1. The contacts of the flow sensor 5 are configured to be submerged and connected to the first tube housing 1. The output interface of the flow sensor 5 is configured to be connected to the input interface of the PLC controller.

[0062] The flow sensor 5 forms a support connection point for the first shell 1. The flow sensor 5 enables the connection with the first shell 1. Its technical purpose is to serve as a component for picking up the flow signal of transformer oil.

[0063] In this embodiment, the oil pump 6 is configured as an oil pump with a control motor and the port of the oil pump 6 is configured to be embeddedly connected to the first housing 1. The control port of the oil pump 6 is configured to be connected to the output interface of the PLC controller.

[0064] The oil pump 6 forms a support connection point for the first shell 1. The oil pump 6 realizes the connection with the first shell 1. Its technical purpose is to serve as a component to drive the transformer oil to flow in the first shell 1.

[0065] In this embodiment, the second housing 7 is configured as a pipe and one of its ports is configured to be connected to the tee connector 9, the cross-section of the other port of the second housing 7 is configured to be connected to the flow regulator 8, and the other port of the second housing 7 is configured to be connected to the first control valve 91.

[0066] The second shell 7 forms a support connection point for the flow stabilizing valve 8, the three-way connector 9, and the first control valve 91. The second shell 7 enables the connection with the flow stabilizing valve 8, the three-way connector 9, and the first control valve 91. Its technical purpose is to serve as a support carrier for the flow stabilizing valve 8 and the three-way connector 9.

[0067] In this embodiment, the flow stabilizing valve 8 is configured as a system balance flow stabilizing valve with unidirectional flow and the port of the flow stabilizing valve 8 is configured to be embeddedly connected to the second housing 7.

[0068] The flow stabilizing valve 8 forms a support connection point for the second shell 7. The flow stabilizing valve 8 realizes the connection with the second shell 7. Its technical purpose is to serve as a component for distributing and balancing the flow of transformer oil in each of the second shell 7.

[0069] In this embodiment, the tee connector 9 is configured as a positive tee, and the first interface of the tee connector 9 is configured to be connected to the transformer oil storage tank, the second interface of the tee connector 9 is configured to be connected to the second shell 7, and the third interface of the tee connector 9 is configured to be connected to the second control valve 92.

[0070] The three-way connector 9 forms a support connection point for the second shell 7 and the second control valve 92. The three-way connector 9 enables the connection with the second shell 7 and the second control valve 92. Its technical purpose is to serve as a component for interconnection between the transformer oil storage tank, the second shell 7 and the second control valve 92.

[0071] In this embodiment, the first control valve 91 is configured as a multi-way control valve and the input interface of the first control valve 91 is configured to be connected in communication with the second housing 7, and the output interface of the first control valve 91 is configured to be connected in communication with the first housing 1.

[0072] The first control valve 91 forms a support connection point for the first shell 1 and the second shell 7. The first control valve 91 realizes the connection with the first shell 1 and the connection with the second shell 7. Its technical purpose is to serve as a component that connects the second shell 7 and the first shell 1.

[0073] In this embodiment, the second control valve 92 is configured as a multi-way control valve, and the input interface of the second control valve 92 is configured to be connected to the three-way connector 9. The output interface of the second control valve 92 is configured to be connected to the online oil chromatographic monitoring 93.

[0074] The second control valve 92 forms a support connection point for the three-way connector 9 and the online oil chromatography monitor 93. The connection with the three-way connector 9 and the online oil chromatography monitor 93 are realized by the second control valve 92. Its technical purpose is to serve as a component for mutual communication between the three-way connector 9 and the online oil chromatography monitor 93.

[0075] In this embodiment, the online oil chromatographic monitor 93 is configured as a transformer oil chromatographic monitor, and the oil injection port of the online oil chromatographic monitor 93 is configured to be connected in communication with the second control valve 92.

[0076] The online oil chromatography monitoring 93 forms a support connection point for the second control valve 92. The online oil chromatography monitoring 93 realizes the connection with the second control valve 92. Its technical purpose is to be used as a component for diagnosing and analyzing the content of fault gases such as carbon monoxide, methane, ethylene, ethane, acetylene, and carbon dioxide in transformer oil.

[0077] In this embodiment, the first housing 1 and hydrogen sensor 2 are distributed with the second housing 7, tee connector 9 and first control valve 91 in a manner that monitors at the main pipe. The first housing 1, hydrogen sensor 2, second housing 7, tee connector 9 and first control valve 91 are distributed with the second control valve 92 and oil chromatograph online monitoring 93 in a manner that monitors at the branch pipe. The first housing 1, hydrogen sensor 2, second housing 7, tee connector 9 and first control valve 91 are distributed with the temperature sensor 3 and pressure sensor 4 in a manner that monitors correction parameters. Furthermore, the first casing 1, hydrogen sensor 2, second casing 7, tee connector 9, and first control valve 91 are arranged with flow sensor 5 and oil pump 6 in a dynamic flow manner. The first casing 1, hydrogen sensor 2, second casing 7, tee connector 9, and first control valve 91 are arranged with flow stabilizing valve 8 in a flow balance manner. One second casing 7, one flow stabilizing valve 8, and one tee connector 9 are arranged to form a group of separate pipe components. The multiple groups of separate pipe components are arranged on the first control valve 91. The separate pipe components are arranged to correspond to the transformer oil storage tank.

[0078] The usage method of this embodiment is as follows: Connect the first port of the tee connector 9 and the other port of the first shell 1 to the transformer oil storage tank respectively, so that the first control valve 91, oil pump 6, hydrogen sensor 2, temperature sensor 3, pressure sensor 4, and flow sensor 5 are in working state. The transformer oil in multiple transformer oil storage tanks is collected by the corresponding tee connector 9 and the second shell 7 under the pumping action of the oil pump 6 and passed through the first shell 1. Then, the transformer oil is delivered to multiple transformer oil storage tanks respectively through the other port of the first shell 1. The flow sensor 5 picks up the flow signal of the transformer oil. The speed of the motor controlling the oil pump 6 is adjusted by the PLC controller to maintain a balanced and stable flow of transformer oil in the first shell 1.

[0079] Hydrogen sensor 2 picks up the hydrogen content signal of the transformer oil in the first shell 1, temperature sensor 3 picks up the temperature signal of the transformer oil in the first shell 1, and pressure sensor 4 picks up the pressure signal of the transformer oil in the first shell 1. These signals are transmitted to a data processing computer, which processes them to obtain the hydrogen content value and the growth rate of the hydrogen content in the transformer oil in the first shell 1. The hydrogen content value and the growth rate are compared with a specified standard value. If the hydrogen content value or the growth rate exceeds the specified standard value, it indicates that the transformer connected to the second shell 7 in the multi-component split tube assembly has failed. Control valve 91 sequentially disconnects the second shell 7 from the first shell 1 in the multi-component sectional tubular assembly, thereby obtaining the hydrogen content value and the hydrogen content growth rate of the transformer oil in the first shell 1. When the hydrogen content value and the hydrogen content growth rate do not exceed the specified standard value, the transformer connected to the disconnected second shell 7 has failed. Through the second control valve 92, the three-way connector 9 and the online oil chromatograph 93 connected to the disconnected second shell 7 are connected. The online oil chromatograph 93 measures the content values ​​of carbon monoxide, methane, ethylene, ethane, acetylene, and carbon dioxide in the transformer oil under failure. The nature of the failure of the transformer under failure is determined based on the content values ​​of carbon monoxide, methane, ethylene, ethane, acetylene, and carbon dioxide.

[0080] In verifying this utility model, the inventors abandoned the existing technical features that rely on online oil chromatography to monitor the content of fault gases such as dissolved hydrogen, carbon monoxide, methane, ethylene, ethane, acetylene, and carbon dioxide in the oil to diagnose and analyze the transformer's operating status. Instead, they first proposed a technical feature that uses a single fault gas content signal to select and differentiate faulty transformers. This resulted in the first unexpected technical effect: using hydrogen content as a selection signal improved the response performance to transformer faults. The second unexpected technical effect: enabling the transport of transformer oil via a branched pipe assembly consisting of the first control valve 91, the first casing 1, and the second casing 7 optimized the monitoring pipeline structure and increased the transport performance of sampled transformer oil. The third unexpected technical effect: enabling the use of hydrogen sensor 2 to pick up the selection and differentiation signal improved the selection area. The improved signal acquisition reliability resulted in a fourth unexpected technical effect: the temperature sensor 3 and pressure sensor 4 acquired correction signals, improving the accuracy of online monitoring of hydrogen content. A fifth unexpected technical effect was achieved: the flow sensor 5 and oil pump 6 controlled transformer oil delivery, improving the stability of transformer oil delivery and the consistency of relative flow velocity between the transformer oil and the hydrogen sensor 2, temperature sensor 3, and pressure sensor 4. A sixth unexpected technical effect was achieved: the flow stabilizing valve 8 balanced the transformer oil delivery to the second shell group 7, ensuring the overall proportion of transformer oil remained the same. A seventh unexpected technical effect was achieved: the three-way connector 9, the second control valve 92, and the online oil chromatograph 93 monitored the content of other fault gases online, providing a basis for accurately determining the fault type.

[0081] In the second embodiment of this utility model, the first control valve 91, the first housing 1, the second housing 7, and the hydrogen sensor 2 are interconnected in a manner that the transformer that has failed is selected and distinguished by a single fault gas content signal.

[0082] In this embodiment, the hydrogen sensor 2 is connected to the first control valve 91, the first housing 1, and the second housing 7 in a manner that picks up the hydrogen content signal of the mixed transformer oil.

[0083] In this embodiment, a first accessory device is also included and disposed on the first casing 1. The first accessory device is configured to include a flow sensor 5 and an oil pump 6.

[0084] In this embodiment, a second accessory device is also included and disposed on the first housing 1. The second accessory device is configured to include a temperature sensor 3 and a pressure sensor 4.

[0085] In this embodiment, a third accessory device is also included and disposed on the second housing 7. The third accessory device is configured as a flow stabilizing valve 8.

[0086] In this embodiment, a fourth accessory device is also included and disposed on the second housing 7. The fourth accessory device is configured to include a three-way connector 9, a second control valve 92, and an online oil chromatogram monitoring device 93.

[0087] The second embodiment of this utility model is based on the first embodiment.

[0088] This utility model has the following features:

[0089] 1. By designing a first control valve 91, a first housing 1, a second housing 7, and a hydrogen sensor 2, the first control valve 91 enables on / off control between the first housing 1 and the second housing 7. The second housing 7 enables the output of transformer oil from the transformer oil storage tank. The first housing 1 enables the mixing and transportation of the transformer oil output from the transformer oil storage tank. The hydrogen sensor 2 enables the acquisition of hydrogen content signals in the mixed transformer oil. This allows for the selection and differentiation of faulty transformers based on a single fault gas content signal. This solves the technical problem of diagnosing and analyzing the transformer operating status by monitoring the content of fault gases such as dissolved hydrogen, carbon monoxide, methane, ethylene, ethane, acetylene, and carbon dioxide in the oil through online oil chromatography. Therefore, the online monitoring effect of the transformer is improved.

[0090] 2. Due to the design of flow sensor 5 and oil pump 6, the transformer oil is powered to be transported in the first casing 1.

[0091] 3. Due to the design of temperature sensor 3 and pressure sensor 4, the hydrogen content value can be corrected by temperature and pressure values.

[0092] 4. Due to the design of the flow stabilizing valve 8, the transformer oil in the second shell group 7 is kept in a balanced flow.

[0093] 5. Due to the design of the three-way connector 9, the second control valve 92, and the online oil chromatograph monitoring 93, the online monitoring of the content of other fault gases in the transformer oil is realized.

[0094] 6. Because the design limits the numerical range of the structural shape, the numerical range is a technical feature in the technical solution of this utility model, and is not a technical feature obtained by formula calculation or a limited number of experiments. The experiment shows that the technical feature of the numerical range has achieved very good technical effect.

[0095] 7. Due to the design of the technical features of this utility model, and the combined effect of the individual and collective technical features, experiments have shown that the performance indicators of this utility model are at least 1.7 times that of existing performance indicators, and it has been evaluated as having great market value.

[0096] Other technical features, such as the connection of the first control valve 91, the first housing 1, the second housing 7, and the hydrogen sensor 2, which are different from those used to select and distinguish faulty transformers by a single fault gas content signal, are also embodiments of this utility model. Furthermore, the technical features of the above embodiments can be combined arbitrarily. In order to meet the requirements of the Patent Law, the Patent Implementation Regulations, and the Examination Guidelines, all possible combinations of the technical features in the above embodiments will not be described.

[0097] The above embodiments are merely one implementation of the online oil chromatography monitoring system for transformer oil provided by this utility model. Any modifications to the solution provided by this utility model, including adding or reducing components or steps, or applying this utility model to other technical fields similar to this utility model, shall all fall within the protection scope of this utility model.

Claims

1. An online oil chromatography monitoring system for transformer oil, characterized in that: It includes a first control valve (91) used as an intermediate valve, a first housing (1) disposed between the first control valve (91) and the transformer oil storage tank, a second housing (7) assembly disposed between the first control valve (91) and the transformer oil storage tank, and a hydrogen sensor (2) disposed on the first housing (1). It also includes a first accessory device and is disposed on the first casing (1). The first accessory device is configured to include a flow sensor (5) and an oil pump (6). It also includes a second accessory device disposed on the first housing (1), the second accessory device being configured to include a temperature sensor (3) and a pressure sensor (4). It also includes a third accessory device and is disposed on the second shell (7), the third accessory device being configured as a flow regulator (8). It also includes a fourth accessory device and is disposed on the second housing (7). The fourth accessory device is configured to include a tee connector (9), a second control valve (92), and an online oil chromatogram monitor (93). A hydrogen sensor (2), a temperature sensor (3), a pressure sensor (4), a flow sensor (5), and an oil pump (6) are respectively installed on the first shell (1). A flow stabilizing valve (8) and a three-way connector (9) are respectively installed on the second shell (7). A first control valve (91) is installed between the second shell (7) and the first shell (1). A second control valve (92) is installed between the three-way connector (9) and the online oil chromatogram monitoring (93). The second housing (7) is configured as a pipe and one of its ports is configured to be connected to a tee fitting (9), the cross-section of the other port of the second housing (7) is configured to be connected to a flow regulator (8), and the other port of the second housing (7) is configured to be connected to a first control valve (91).

2. The online oil chromatography monitoring system for transformer oil according to claim 1, characterized in that: The first control valve (91), the first housing (1), the second housing (7), and the hydrogen sensor (2) are interconnected in a manner that selects and distinguishes the faulty transformer by a single fault gas content signal.

3. The online oil chromatography monitoring system for transformer oil according to claim 2, characterized in that: The hydrogen sensor (2) is connected to the first control valve (91), the first housing (1), and the second housing (7) in a manner that picks up the hydrogen content signal of the mixed transformer oil.

4. The online oil chromatography monitoring system for transformer oil according to claim 1, characterized in that: The first control valve (91) is configured as a multi-way control valve and the input interface of the first control valve (91) is configured to be connected to the second shell (7), and the output interface of the first control valve (91) is configured to be connected to the first shell (1).

5. The online oil chromatography monitoring system for transformer oil according to claim 1, characterized in that: the first tube The shell (1) is configured as a pipe and one of the ports of the first shell (1) is configured to be connected to the first control valve (91). The cross-section of the other port of the first shell (1) is configured to be connected to the oil pump (6) and the other port of the first shell (1) is configured to be connected to the transformer oil storage tank. The pipe wall of the first shell (1) is configured to be connected to the shell of the hydrogen sensor (2), the shell of the temperature sensor (3), the shell of the pressure sensor (4) and the shell of the flow sensor (5) respectively. The first shell (1) is configured to be connected to the contacts of the hydrogen sensor (2), the contacts of the temperature sensor (3), the contacts of the pressure sensor (4) and the contacts of the flow sensor (5) respectively.

6. The online oil chromatography monitoring system for transformer oil according to claim 1, characterized in that: The hydrogen sensor (2) is configured as a palladium alloy hydrogen sensor and the housing of the hydrogen sensor (2) is configured to be connected to the first tube shell (1). The contacts of the hydrogen sensor (2) are configured to be submerged in connection with the first tube shell (1). The output interface of the hydrogen sensor (2) is configured to be connected to the input interface of the data processing computer.

7. The online oil chromatography monitoring system for transformer oil according to claim 1, characterized in that: The flow sensor (5) is configured as a core-type flow sensor, and the housing of the flow sensor (5) is configured to be connected to the first pipe housing (1). The contacts of the flow sensor (5) are configured to be submerged in the first pipe housing (1), and the output interface of the flow sensor (5) is configured to be connected to the input interface of the PLC controller. Alternatively, the oil pump (6) is configured as an oil pump with a control motor and the port of the oil pump (6) is configured to be embedded in the first housing (1), and the control port of the oil pump (6) is configured to be connected to the output interface of the PLC controller. Alternatively, the temperature sensor (3) is configured as a contact temperature sensor, and the housing of the temperature sensor (3) is configured to be connected to the first tube housing (1), the contact of the temperature sensor (3) is configured to be recessed into the first tube housing (1), and the output interface of the temperature sensor (3) is configured to be connected to the input interface of the data processing computer. Alternatively, the pressure sensor (4) is configured as an absolute pressure sensor, and the housing of the pressure sensor (4) is configured to be connected to the first tube housing (1), the contacts of the pressure sensor (4) are configured to be submerged in connection with the first tube housing (1), and the output interface of the pressure sensor (4) is configured to be connected to the input interface of a data processing computer. Alternatively, the flow regulator (8) is configured as a system balancing flow regulator with unidirectional flow and the port of the flow regulator (8) is configured to be embedded in the second housing (7). Alternatively, the tee connector (9) is configured as a positive tee, with the first port of the tee connector (9) configured to be connected to the transformer oil storage tank, the second port of the tee connector (9) configured to be connected to the second casing (7), and the third port of the tee connector (9) configured to be connected to the second control valve (92). Alternatively, the second control valve (92) may be configured as a multi-way control valve, with its input port connected to the three-way connector (9) and its output port connected to the online oil chromatographic monitoring system (93). Alternatively, the online oil chromatogram monitor (93) is configured as a transformer oil chromatogram monitor and the oil injection port of the online oil chromatogram monitor (93) is configured to be connected to the second control valve (92).

8. The online oil chromatography monitoring system for transformer oil according to any one of claims 1 to 7, characterized in that: the first tube The housing (1) and hydrogen sensor (2) are arranged with the second housing (7), tee connector (9) and first control valve (91) in a manner that monitors at the main pipe, and the first housing (1), hydrogen sensor (2), second housing (7), tee connector (9) and first control valve (91) are arranged with the second control valve (92) and oil chromatograph online monitoring (93) in a manner that monitors at the branch pipe. (91) The temperature sensor (3) and pressure sensor (4) are arranged to monitor the corrected parameters, and the first shell (1), hydrogen sensor (2), second shell (7), tee connector (9) and first control valve (91) are arranged to monitor the flow in a dynamic flow manner, and the first shell (1), hydrogen sensor (2), second shell (7), tee connector (9) and first control valve (91) are arranged to monitor the flow in a balanced manner. Alternatively, a second tube shell (7), a flow stabilizing valve (8), and a three-way connector (9) are configured to form a group of separate tube components, and the multiple groups of separate tube components are configured to be arranged on the first control valve (91). The separate tube components are arranged to be distributed corresponding to the transformer oil storage tank.

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