CN111896355A - Transformer online monitoring device and transformer online monitoring method - Google Patents
Transformer online monitoring device and transformer online monitoring method Download PDFInfo
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- CN111896355A CN111896355A CN202010599088.9A CN202010599088A CN111896355A CN 111896355 A CN111896355 A CN 111896355A CN 202010599088 A CN202010599088 A CN 202010599088A CN 111896355 A CN111896355 A CN 111896355A
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Abstract
The disclosure relates to a transformer online monitoring device and a transformer online monitoring method. This transformer on-line monitoring device includes: the device comprises a degassing module, a gas detection module, a processing control module and a protective shell; the protective shell is connected with a fluid container of the transformer, and a fluid passing port is arranged between the protective shell and the fluid container; the degassing module is arranged in the protective shell and used for isolating partial space in the protective shell to form a gas detection chamber, the degassing module is used for separating a fluid to be monitored and gas dissolved in the fluid to enable the separated gas to enter the gas detection chamber, and the separated fluid is isolated outside the gas detection chamber; the gas detection module is used for detecting gas in the gas detection chamber and transmitting detection data to the processing control module; the processing control module is in communication connection with the gas detection module and is used for determining the type and content of gas in the fluid to be monitored according to the detection data. The embodiment of the disclosure can solve the problem of higher cost of the existing transformer online monitoring.
Description
Technical Field
The disclosure relates to the technical field of intelligent traction transformer state online monitoring, in particular to a transformer online monitoring device and a transformer online monitoring method.
Background
The transformer oil circulates in the oil-immersed transformer, the main function of the transformer oil is insulation and cooling, the transformer oil can generate chemical reaction to generate dissolved gas when the transformer operates abnormally, for example, partial discharge occurs, the gas is subjected to component analysis, potential faults or insulation aging degree inside the transformer can be found at the first time, and the state of the transformer is monitored. The transformer on-line monitoring of the state of the oil-immersed transformer mainly comprises monitoring of the content of gas and micro water in transformer oil, monitoring of internal partial discharge amount, monitoring of iron core grounding current and the like. At present, the widely used transformer on-line monitoring equipment is mainly a transformer oil gas on-line monitoring device. The online monitoring product of the gas-in-oil transformer based on the chromatographic and spectral principles is an online monitoring device for the gas-in-oil transformer widely used in the power system at present. Although products based on the chromatographic principle have the problem of large maintenance workload such as regular calibration, carrier gas replacement and the like, since each substation in a power system is basically provided with professional operation and inspection personnel, regular maintenance of the products can be completely realized. Although the products based on the spectrum principle are maintenance-free devices, the high price of the products causes that the transformers with the voltage of over 500kV are generally used in the power system step by step.
In contrast, in a railway traction power supply system, a traction transformer and an autotransformer have the characteristics of small volume, less material consumption and high efficiency, and with the continuous increase of the total mileage of domestic electrified railways, the increase of the traction weight of a train and the improvement of the running speed of the train, the traction current is multiplied, so that the load of the traction power supply system changes violently and the external short circuit is frequent. In the working process of the online monitoring product for gas in oil based on the chromatographic principle or the online monitoring product for gas in oil based on the spectral principle, basically, oil is taken from an oil pipe, sample fault gas is separated in a vacuum or headspace mode, and then detection and analysis are carried out. The method can be completely realized under the relatively stable load environment of the power system, and based on the current situations of severe load change and frequent external short circuit of the railway power supply system, the two products have high realization difficulty and high cost.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the present disclosure provides an online transformer monitoring device and an online transformer monitoring method, which are applicable to online transformer monitoring in a novel transformer state of a railway traction power supply system, and are easy to implement and low in cost.
The present disclosure provides an on-line monitoring device for a transformer, which comprises a degassing module, a gas detection module, a processing control module and a protective shell;
the protective shell is connected with a fluid container of the transformer, and a fluid passing port is arranged between the protective shell and the fluid container;
the degassing module is arranged in the protective shell and used for isolating partial space in the protective shell to form a gas detection chamber, the degassing module is used for separating a fluid to be monitored and gas dissolved in the fluid to enable the separated gas to enter the gas detection chamber, and the separated fluid is isolated outside the gas detection chamber;
the gas detection module is used for detecting gas in the gas detection chamber and transmitting detection data to the processing control module;
and the processing control module is in communication connection with the gas detection module and is used for determining the type and the content of the gas in the fluid to be monitored according to the detection data.
Optionally, the gas detection module is disposed in the gas detection chamber.
Optionally, the gas detection module is arranged in an auxiliary gas detection chamber, the auxiliary gas detection chamber is arranged outside the protective casing and detachably connected with the protective casing, and the auxiliary gas detection chamber is communicated with the gas detection chamber.
Optionally, the degassing module comprises a degassing membrane and a microporous substrate;
the degassing membrane is attached to one side of the microporous substrate, which is far away from the gas detection chamber.
Optionally, the degassing membrane comprises an AF2400 polymeric degassing membrane.
Optionally, the microporous substrate is formed by sintering and pressing stainless steel powder at a high temperature.
Optionally, the online monitoring device for the transformer further comprises a protection screen, wherein the protection screen is attached to one side of the degassing membrane facing the fluid to be monitored.
Optionally, the protection screen plate and the protection shell are made of stainless steel.
Optionally, the gas detection module comprises at least one gas sensor.
Optionally, the gas sensor comprises SnO2A sensor.
Optionally, the monitoring device further comprises a temperature control module and a moisture detection module, wherein the temperature control module and the moisture detection module are both fixed in the protective shell and are arranged on one side of the protective shell, which is communicated with the space to be monitored; the temperature control module and the moisture detection module are in communication connection with the processing control module;
the temperature control module is used for monitoring the temperature of the fluid to be monitored;
the moisture detection module is used for monitoring the moisture content in the fluid to be monitored.
Optionally, the processing control module includes a transmitter board, a motherboard and a display;
the input of changer board with the output of gaseous detection module is connected, the output of changer board temperature control module and moisture detection module all with the input of mainboard is connected, the output of mainboard with the display is connected.
Optionally, the fluid container includes a ball valve, and the transformer online monitoring device is fixedly mounted on the ball valve of the transformer in a wall-hanging manner.
Optionally, the degassing module is in contact with insulating oil in the transformer through an open flange.
The present disclosure also provides an online monitoring method for a transformer, which can be implemented by applying the online monitoring device for a transformer, and the online monitoring method for a transformer includes:
the gas detection module detects gas in the gas detection chamber and transmits detection data to the processing control module; the gas is the gas which enters the gas detection chamber after the fluid to be monitored is separated by the degassing module;
and the processing control module determines the type and content of the gas in the fluid to be monitored according to the detection data.
Optionally, the processing control module includes a signal conversion sub-module, a signal processing sub-module and a status display sub-module; the processing control module determining the type and content of the gas in the fluid to be monitored according to the detection data comprises:
the signal conversion sub-module converts the detection data into a standardized signal and transmits the standardized signal to the signal processing sub-module;
the signal processing submodule processes the standardized signal, determines the type and content of gas in the fluid to be monitored, and transmits the gas to the state display submodule;
and the state display submodule displays the gas type and content in the fluid to be monitored.
Optionally, the status display sub-module further comprises after displaying the gas type and content in the fluid to be monitored,
and the signal processing submodule uploads the gas type and content to a remote server.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages: through setting up transformer on-line monitoring device and including the degasification module, gaseous detection module, processing control module and protecting sheathing, usable degasification module keeps apart partial space in the protecting sheathing as gaseous detection room, and the degasification module can be with waiting to monitor fluid and wherein gas separation that can dissolve, make the gas after the separation get into in the gaseous detection room, the fluid after the separation is kept apart outside gaseous detection room, gaseous detection module can detect the gas that gets into in the gaseous detection room, form the testing data, and will detect data transmission to processing control module, processing control module is through handling testing data, can confirm whether there is gaseous and gaseous kind and content in the fluid of waiting to monitor. Therefore, the fluid to be monitored can be separated from the gas which can be dissolved in the fluid to be monitored and detected without taking the fluid out of the fluid container of the transformer for detection, so that the gas in the fluid to be monitored can be monitored in real time and continuously, the device has the advantages of simple structure, easiness in realization, fewer structural components, simple detection principle, no need of consumables such as carrier gas and chromatographic columns and low cost; meanwhile, the degassing module is protected by the protective shell, so that the overall performance stability of the device is ensured, and the maintenance cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an online transformer monitoring device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure;
fig. 7 is a schematic flow chart of a transformer online monitoring method according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a detailed flow of S220 in the transformer online monitoring method shown in fig. 7.
Wherein: 03. a fluid container 01, a fluid to be monitored; 10. a transformer on-line monitoring device; 110. a degassing module 111, a degassing membrane 112, a microporous substrate; 120. a gas detection module 121, a gas sensor; 130. the device comprises a processing control module 131, a signal conversion submodule 132, a signal processing submodule 133 and a state display submodule; 140. a protective housing; 150. protecting the screen plate; 160. a temperature control module; 170. and a moisture detection module.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments. The various embodiments of the disclosure, generally described and illustrated in the figures herein, may be combined with each other, and the structural components or functional blocks thereof may be arranged and designed in a variety of different configurations, without conflict. Thus, the following detailed description of the embodiments of the present disclosure, presented in the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the disclosed products are conventionally placed in use, and are only for convenience in describing and simplifying the present disclosure, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure. Moreover, relational terms such as "first," "second," "third," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present disclosure, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
The transformer on-line monitoring device and the transformer on-line monitoring method provided by the embodiment of the disclosure are applicable to on-line monitoring of novel transformer oil of a railway traction power supply system, can realize single-component on-line monitoring or multi-component on-line monitoring of gas in the transformer oil, and are different from the common single-component or multi-component transformer on-line monitoring device of a power system. The transformer online monitoring device and the transformer online monitoring method provided by the embodiment of the disclosure are exemplarily described below with reference to fig. 1 to 7.
Fig. 1 is a schematic structural diagram of an online transformer monitoring device according to an embodiment of the present disclosure. Referring to fig. 1, the transformer on-line monitoring apparatus 10 (hereinafter, may be simply referred to as "apparatus 10") includes a degassing module 110, a gas detection module 120, a process control module 130, and a protective case 140; the protective shell 140 is connected with a fluid container 03 of the transformer, and a fluid passing port is arranged between the protective shell 140 and the fluid container 03; the degassing module 110 is disposed in the protective casing 140 and is configured to isolate a part of space in the protective casing 140 to form a gas detection chamber, the degassing module 110 is configured to separate the fluid 01 to be monitored and a gas dissolved therein, so that the separated gas enters the gas detection chamber, and the separated fluid is isolated outside the gas detection chamber; the gas detection module 120 is used for detecting the gas in the gas detection chamber and transmitting the detection data to the process control module 130; the process control module 130 is communicatively connected to the gas detection module 120 for determining the type and amount of gas in the fluid 01 to be monitored based on the detection data.
The transformer may be any transformer in a train traction power supply system, for example, the transformer may be a traction transformer or an autotransformer, and the liquid container 03 of the transformer may be a device structure for containing fluid in the transformer.
The connection between the protective casing 140 and the fluid container 03 may be a direct connection (as shown in fig. 1) or an indirect connection (not shown). For example, when the connection port of the protective casing 140 and the connection port of the fluid container 03 can be matched, the two can be directly connected; when the connection port of the protective casing 140 is not matched with the connection port of the fluid container 03, the two may be indirectly connected through the adapter, which is not limited in the embodiment of the disclosure.
The fluid passage port allows the fluid 01 to be monitored in the fluid container 03 to flow into the protective casing 140, and circulates between the fluid container 03 and the protective casing 140. For example, the fluid passing port may be a single opening, two openings, a plurality of openings, or a mesh port, and the function of allowing the fluid to pass may be implemented, which is not limited by the embodiment of the present disclosure.
The fluid 01 to be monitored may be transformer oil or other types of fluids that need to be monitored in real time, which are known to those skilled in the art, and the embodiment of the present disclosure is not limited thereto. The fluid 01 to be monitored flows in the fluid container 03, and in an exemplary embodiment, transformer oil flows in the transformer, so as to insulate and cool each electrical component in the transformer.
The protective casing 140 is communicated with the fluid container 03 through the fluid passage port, and the degassing module 110 is disposed in the protective casing 140 and forms a space capable of accommodating the separated gas, i.e., a gas detection chamber, with the protective casing 140. Thus, one side of the degassing module 110 is in contact with the fluid 01 to be monitored and the other side is the gas detection chamber. During the flowing process of the fluid 01 to be monitored, the degassing module 110 can separate gas possibly existing in the fluid 01 to be monitored from the fluid without affecting the flowing process of the fluid 01 to be monitored, meanwhile, the separated gas enters the gas detection chamber, and the separated fluid is isolated outside the gas detection chamber. Based on this, the gas detection module 120 can detect the separated gas and send the detection information to the process control module 130, and the process control module can determine the type (i.e., "composition") and content of the gas in the fluid 01 to be monitored according to the detection information. Particularly, when no gas exists in the fluid 01 to be monitored, the detection data correspondingly contains the relevant information of no gas, namely, the device can realize the monitoring of the existence of the gas in the fluid 01 to be monitored and the monitoring of the type and the content of the gas. Therefore, the transformer on-line monitoring device 10 provided by the embodiment of the disclosure has a simple structure, does not need consumables such as chromatographic columns and carrier gas, and is beneficial to reducing the cost; meanwhile, the fluid does not need to be taken out of the fluid container 03, and the dissolved gas in the fluid 01 to be monitored is separated and detected in the flowing process of the fluid 01 to be monitored, so that the real-time and continuous monitoring of the fluid 01 to be monitored can be realized.
In addition, protective housing 140 may protect degassing module 110 disposed therein, thereby facilitating ensuring structural and performance stability of apparatus 10 and reducing maintenance costs of apparatus 10.
First, it should be noted that the process control module 130 may be disposed on the site or disposed at a remote end, which is not limited in the embodiment of the present disclosure.
Next, it should be noted that the actual implementation manner of the "communication connection" in this document may be an electrical connection or other communication connection manners known to those skilled in the art, and the embodiment of the present disclosure is not limited thereto.
The transformer online monitoring device 10 provided by the embodiment of the present disclosure includes a degassing module 110, a gas detection module 120, a process control module 130, and a protective casing 140, a part of space in the protective casing 140 may be isolated by the degassing module 110 as a gas detection chamber, the degassing module 110 may separate a fluid 01 to be monitored from a gas that may be dissolved therein, so that the separated gas enters the gas detection chamber, the separated fluid is isolated outside the gas detection chamber, the gas detection module 120 may detect the gas entering the gas detection chamber, form detection data, and transmit the detection data to the process control module 130, and the process control module 130 may determine whether the gas exists in the fluid 01 to be monitored and the type and content of the gas by processing the detection data. Therefore, the fluid to be monitored can be separated from the gas which can be dissolved in the fluid 01 to be monitored and detected without taking the fluid out of the fluid container 03 for detection, so that the gas in the fluid 01 to be monitored can be continuously monitored in real time, the device 10 is simple in structure and easy to realize, the structural components of the device 10 are fewer, the detection principle is simple, and the cost is lower; meanwhile, the degassing module 110 is protected by the protective casing 140, which is beneficial to ensuring the performance stability of the whole device 10 and reducing the maintenance cost. Specifically, the transformer online monitoring device 10 can be applied to each traction substation and switching substation in a railway traction system, particularly an auto-coupling (AT) substation, and due to the fact that the overall stability of the device 10 is good, configuration of professional operation and inspection personnel of each substation in the traction system can be reduced, and therefore the cost of manpower and material resources is reduced, and the transformer online monitoring cost is favorably reduced.
In one embodiment, with continued reference to FIG. 1, the gas detection module 120 is disposed within a gas detection chamber. That is, the gas detection module 120 is also disposed in the protective casing 140, so that the gas detection module 120 can be protected by the protective casing 140, which is beneficial to further improving the structural and performance stability of the apparatus 10 and reducing the maintenance cost thereof.
In contrast, the gas detection module 120 may be disposed outside the protective housing 140 (not shown). Optionally, the gas detection module 120 is disposed in the auxiliary gas detection chamber, the auxiliary gas detection chamber is disposed outside the protective casing 140 and detachably connected to the protective casing 140, and the auxiliary gas detection chamber is communicated with the gas detection chamber.
Wherein, supplementary gaseous detection room and gaseous detection room intercommunication, then the gaseous further circulation that gets into in the gaseous detection room is to supplementary gaseous detection indoor. Based on this, the gas detection module 120 is disposed in the auxiliary detection chamber, and the gas detection module 120 is still exposed to the atmosphere of the gas separated from the fluid 01 to be monitored, so that the detection of the components and content of the gas dissolved in the fluid 01 to be monitored can be realized. Meanwhile, because the auxiliary gas detection chamber is detachably connected with the protective housing 140, when the gas detection module 120 fails, the auxiliary gas detection chamber and the protective housing 140 can be detached to realize the overhaul or replacement of the gas detection module 120, thereby being beneficial to realizing operation and maintenance and reducing the maintenance difficulty and the maintenance cost.
In an embodiment, fig. 2 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure. Referring to fig. 2, the degassing module 110 includes a degassing membrane 111 and a microporous substrate 112; the degassing membrane 111 is attached to the microporous substrate 112 on the side facing away from the gas detection chamber.
Wherein, the microporous substrate 112 is used for fixing and effectively supporting the degassing membrane 111, so that the degassing membrane 111 is not easy to break; meanwhile, when the fluid 01 to be monitored flows through the degassing membrane 111, the gas dissolved therein permeates to the gas detection chamber through the degassing membrane 111 and the microporous substrate 112, so that the gas detection module 120 performs detection.
It should be noted that the shape, number and arrangement of the micro holes of the micro hole substrate 112 may be set according to the requirement of the transformer online monitoring device 10, which is not limited in the embodiment of the disclosure.
In one embodiment, degassing membrane 111 comprises an AF2400 polymeric degassing membrane.
The AF2400 polymeric degassing membrane can allow gas to permeate through but not fluid to permeate through, so that gas molecules dissolved in the fluid 01 to be monitored can permeate into molecular structures of the degassing membrane 111 and diffuse into a relatively closed gas detection chamber through the microporous substrate 112 in a natural flowing state of the fluid 01 to be monitored, and thus, the rapid separation of the fluid 01 to be detected and gas dissolved in the fluid 01 to be detected can be realized, meanwhile, the bidirectional permeation of the gas can be realized, so that the gas content in the gas detection chamber is the same as the gas content in the fluid 01 to be monitored, and the real-time and accurate monitoring can be realized conveniently; when the device 10 is applied to monitoring gas components in transformer oil, the device 10 does not consume oil and pollute the oil, so that the normal work of the transformer is not influenced.
In other embodiments, degassing membrane 111 may also be other types of degassing membranes known to those skilled in the art, and embodiments of the present disclosure are not described or limited herein.
In one embodiment, the microporous substrate 112 is formed by sintering and pressing stainless steel powder at a high temperature, and thus, the microporous substrate 112 may also be referred to as a "sintered plate" or a "microporous sintered plate".
With such an arrangement, on one hand, the microporous substrate 112 is made of stainless steel, so that the performance is stable, the structure is stable, and the maintenance cost is convenient to reduce; on the other hand, the microporous substrate 112 is formed by a high-temperature sintering-pressing method, so that the forming process is mature and the cost is low.
Illustratively, the stainless steel may specifically be 304 stainless steel.
In other embodiments, on the premise of ensuring lower cost, the microporous substrate 112 may be formed by other materials and processes known to those skilled in the art, and may be disposed according to the requirements of the transformer online monitoring apparatus 10, which is neither described nor limited in the embodiments of the present disclosure.
In an embodiment, fig. 3 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure. Referring to fig. 3, the on-line transformer monitoring device 10 may further include a protection screen 150, wherein the protection screen 150 is attached to a side of the degassing membrane 111 facing the fluid 01 to be monitored.
The protection screen 150 is disposed between the degassing membrane 111 and the fluid 01 to be monitored, and can buffer the friction force of the fluid 01 to be monitored on the degassing membrane 111 and prevent the degassing membrane 111 from falling off in the flow of the fluid 01 to be monitored.
For example, the shape, number and arrangement of the openings of the protection screen 150 may be set according to the requirement of the transformer online monitoring device 10, which is not limited in the embodiments of the present disclosure.
In one embodiment, the material of the protection screen 150 includes stainless steel.
So configured, it is beneficial to ensure stable performance and stable structure of the protection screen 150, so as to stabilize the degassing membrane 111, thereby being beneficial to reduce maintenance cost of the apparatus 10.
In one embodiment, the material of the protective housing 140 includes stainless steel.
By such an arrangement, the stable performance and the stable structure of the protective housing 140 are ensured, so that the maintenance cost of the online transformer monitoring device 10 is reduced.
Illustratively, the stainless steel may be a 304 stainless steel casing of protection grade IP55, so that while the stability and reliability of the structure and performance of the device 10 are achieved, the protective casing 140 is designed to be beautiful, the device 10 is small and exquisite as a whole, the device 10 can ensure that the internal circuits and components thereof work normally in a constant temperature and constant humidity state, and the device 10 can also work normally in an extremely cold and hot environment.
In an embodiment, fig. 4 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure. Referring to fig. 4, the gas detection module 120 includes at least one (exemplary, 2 shown in fig. 4) gas sensor 121.
In this manner, the gas detection module 120 may enable detection of gas in the gas detection chamber.
For example, the determination of the gas composition and the content may be determined according to the detection data of the gas sensor 121 at a specific position in the at least one gas sensor 121, or according to the maximum value, the minimum value or the average value of the gas composition (or the content) corresponding to the detection data, which may be set according to the requirements of the transformer online monitoring apparatus 10, and the embodiment of the present disclosure is not limited thereto.
For example, the gas sensor 121 may be a conductivity gas sensor, so that chemical reduction is not required, gas in the gas detection chamber is not consumed, and the steps of repeated degassing are reduced, thereby greatly reducing the period of gas detection, for example, separation and detection of gas dissolved in the fluid 01 to be monitored can be realized within 20 minutes, which is beneficial to realizing repeated monitoring throughout the day and all-weather real-time on-line monitoring of the transformer.
It should be noted that, taking the orientation shown in fig. 4 as an example, fig. 4 only shows two gas sensors 121 distributed vertically. In other embodiments, the number and arrangement of the gas sensors 121 in the gas detection module 120 may be set according to the requirement of the transformer online monitoring apparatus 10, which is not limited in the embodiments of the present disclosure.
In one embodiment, gas sensor 121 comprises SnO2A sensor.
Wherein SnO2The sensitivity of the sensor is high, and the arrangement is favorable for improving the gas detection precision of the transformer on-line monitoring device 10.
In the actual construction of the device 10, SnO2The sensor can be a ceramic base sensor arranged in the gas detection chamber and SnO2Conductivity sensors for thin films.
Illustratively, the gas sensor may be a TGS821 sensor.
In other embodiments, the gas sensor 121 may also be other types of gas sensors known to those skilled in the art, and the embodiments of the present disclosure are not limited thereto.
In an embodiment, fig. 5 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure. Referring to fig. 5, the transformer online monitoring device 10 may further include a temperature control module 160 and a moisture detection module 170, where the temperature control module 160 and the moisture detection module 170 are both fixed in the protective casing 140 and are disposed at one side of the protective casing 140, which is communicated with the space to be monitored; the temperature control module 160 and the moisture detection module 170 are both in communication connection with the processing control module 130; the temperature control module 160 is used for monitoring the temperature of the fluid 01 to be monitored; the moisture detection module 170 is used to monitor the moisture content in the fluid 01 to be monitored.
So set up, temperature control module 160 and moisture detection module 170 all with wait to monitor fluid 01 direct contact to can monitor the temperature and the moisture content of waiting to monitor fluid 01 more accurately.
The temperature control module 160 can monitor and control the temperature of the fluid 01 to be monitored in real time, so as to facilitate the realization of the constant temperature control of the fluid 01 to be monitored, and when the device 10 is applied to the real-time monitoring of the state of the transformer, the temperature stability of the transformer oil is facilitated, so as to ensure the stable performance of the transformer.
For example, the temperature control module 160 may adopt any type of structure known to those skilled in the art and having temperature monitoring and temperature control functions, and may be configured according to the requirements of the transformer online monitoring device 10, which is neither described nor limited in this disclosure.
The moisture detection module 170 is configured to monitor a moisture content in the fluid 01 to be monitored, and when the moisture content is not within a moisture threshold range, it indicates that the performance of the fluid 01 to be monitored is abnormal. When the apparatus 10 is applied to a transformer, the surface transformer may fail and need to be repaired.
For example, the moisture detection module 170 may be a micro water sensor, or other types of sensors known to those skilled in the art that can monitor moisture content, and may be configured according to the requirements of the transformer online monitoring apparatus 10, which is neither described nor limited in the embodiments of the present disclosure.
In an embodiment, fig. 6 is a schematic structural diagram of another transformer online monitoring device provided in the embodiment of the present disclosure. Referring to fig. 6, the process control module 130 includes a transmitter board, a main board, and a display; the input end of the transmitter board is connected with the output end of the gas detection module, the output end of the transmitter board, the temperature control module and the moisture detection module are all connected with the input end of the mainboard, and the output end of the mainboard is connected with the display.
Wherein the transmitter board can be electrically connected with the gas sensor 121 to process the detection data to obtain standardized data corresponding to the kind, content, etc. of the gas in the gas detection chamber; the transmitter board, the temperature control module 160 and the micro-water sensor are all electrically connected with a motherboard, and the motherboard can perform centralized processing on the received data so as to determine multi-directional performance information of the fluid 01 to be monitored.
On the basis, the display can visually display the gas components and the content in the fluid 01 to be monitored, so that operation and maintenance personnel can conveniently check the state of the transformer oil in the maintenance process.
In addition, the display can also display the temperature and the moisture content of the fluid 01 to be monitored, thereby realizing multi-aspect monitoring of the fluid 01 to be monitored.
Illustratively, the transmitter board, the host board, and the display can be any type of structural component known to those skilled in the art having the above-described functionality. For example, the transducer board may be an HB transducer board, the motherboard may be an HC motherboard, and the Display may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display, which is not limited in the embodiments of the present disclosure.
In an embodiment, the processing control unit 130 may further store data to collectively implement management of data storage, display, and upload.
In one embodiment, the fluid container 3 comprises a ball valve, and the on-line transformer monitoring device 10 can be fixedly mounted on the ball valve of the transformer by using a wall-hanging type.
Therefore, the transformer online monitoring device 10 can realize real-time monitoring of transformer oil, and is firm in connection and simple in installation mode.
For example, the device 10 may be mounted on a ball valve of a transformer by any means known to those skilled in the art, such as screw fastening, screwing, welding, etc., and the disclosed embodiment is not limited thereto.
In other embodiments, the device 10 may also be mounted on other fluid containment structures 03 of the transformer to enable performance monitoring of the fluid therein.
In one embodiment, degassing module 110 is in contact with insulating oil (i.e., transformer oil) in the transformer through an open flange (not shown).
In this manner, however, the degassing module 110 may be in large area contact with the insulating oil in the transformer, thereby facilitating more accurate monitoring; meanwhile, the device 10 is simply and firmly fixedly connected with the transformer, so that the maintenance cost is reduced.
In other embodiments, other ways known to those skilled in the art may be adopted to achieve effective contact between the degassing module 110 and the transformer oil, which may be set according to the requirements of the online transformer monitoring device 10, and the embodiment of the present disclosure is not limited thereto.
It should be noted that fig. 1-6 only exemplarily show the gas detection chamber as a rectangular parallelepiped, and in other embodiments, the shape of the gas detection chamber may also be set according to the requirement of the transformer online monitoring device 10, for example, the gas detection chamber may be a hemisphere or another three-dimensional shape known to those skilled in the art, and the embodiment of the present disclosure is not limited thereto.
The transformer online monitoring device 10 provided by the embodiment of the disclosure can be applied to real-time monitoring of transformer oil, and can realize rapid separation of gas dissolved in the transformer oil by arranging a degassing module, specifically, a degassing membrane and a microporous substrate; by arranging the gas detection module, particularly the conductivity gas sensor, lossless monitoring of gas can be realized; the stainless steel protective shell is formed by customizing a stainless steel casing with a protection grade IP55, so that the whole device 10 can work in a constant-temperature and constant-humidity environment, and the working stability and reliability of the device 10 are ensured; through setting up processing control module including the display, can show relevant monitoring data directly perceived. Therefore, the device 10 has the advantages of simple structure, convenience in operation, visual measurement result, high measurement precision, maintenance-free property, quick response, high cost performance and the like; the consumptive materials such as chromatographic column, carrier gas and the like are not needed, and the cost is lower; meanwhile, the device 10 also has a data remote transmission function, which is beneficial to realizing remote monitoring.
On the basis of the above embodiments, the embodiments of the present disclosure further provide an online monitoring method for a transformer, which can be implemented by applying any one of the online monitoring apparatuses for a transformer provided in the above embodiments. Therefore, the transformer online monitoring method also has the beneficial effects of the transformer online monitoring device in the above embodiment, and the same points can be understood by referring to the explanation of the transformer online monitoring device in the above, and the details are not repeated herein.
Exemplarily, fig. 7 is a schematic flow chart of a transformer online monitoring method according to an embodiment of the present disclosure. Referring to fig. 7, the transformer online monitoring method may include:
s210, the gas detection module detects gas in the gas detection chamber and transmits detection data to the processing control module.
The gas in the gas detection chamber is obtained by separating the fluid to be monitored from the gas dissolved in the fluid to be monitored by the degassing module when the fluid to be monitored flows through the degassing module.
S220, the processing control module determines the type and content of the gas in the fluid to be monitored according to the detection data.
According to the embodiment of the disclosure, the gas detection module is used for detecting the gas which enters the gas detection chamber after being separated by the degassing module, and transmitting the detection data to the processing control module; the processing control module processes the detection data to determine the type and content of the gas in the fluid to be monitored, so that the fluid does not need to be taken out of the fluid container, the circulation process of the fluid in the fluid container is not influenced, and the real-time monitoring is favorably realized. Meanwhile, the detection method does not need consumables such as chromatographic columns, carrier gas and the like, and is low in cost.
In one embodiment, referring to fig. 6, the processing control module 130 includes a signal conversion sub-module 131, a signal processing sub-module 132, and a status display sub-module 133. The signal processing sub-module 132 is in communication connection with the gas detection module 120 through the signal conversion sub-module 131, and the status display sub-module 133 is in communication connection with the signal processing sub-module 132.
On the basis, fig. 8 is a schematic detailed flow diagram of S220 in the transformer online monitoring method shown in fig. 7. On the basis of fig. 7, referring to fig. 8, S220 may include:
and S221, converting the detection data into a standardized signal by the signal conversion submodule, and transmitting the standardized signal to the signal processing submodule.
S222, the signal processing submodule processes the standardized signals, determines the types and the content of the gas in the fluid to be monitored, and transmits the gas to the state display submodule.
And S223, displaying the gas type and content in the fluid to be monitored by the state display submodule.
The signal conversion sub-module 131 can convert the physical quantity or the chemical quantity (i.e., the detection data) detected by the gas detection module 120 into a standardized signal that can be processed by the signal processing sub-module 132, and the signal processing sub-module 132 processes the standardized signal converted from the detection data, so as to determine the gas component and the content in the fluid 01 to be monitored.
On the basis, the status display sub-module 133 can visually display the gas composition and content in the fluid 01 to be monitored, so that operation and maintenance personnel can conveniently view the status of the fluid 01 to be monitored (such as transformer oil) during maintenance.
In addition, the signal processing sub-module 132 can be electrically connected to the temperature control module 160 and the moisture detection module 170, and the status display sub-module 133 is further configured to display the temperature and the moisture content of the fluid 01 to be monitored, so as to realize multi-directional monitoring of the fluid 01 to be monitored.
In an embodiment, on the basis of fig. 8, S223 may further include: the signal processing submodule uploads the gas type and content to a remote server. Thus, remote monitoring can be realized.
In other embodiments, on the basis of fig. 8, S223 may further include: the signal processing submodule synchronously uploads the gas type and content, the temperature and the moisture content to a remote server. Therefore, the remote multi-aspect monitoring of the fluid to be monitored can be realized.
According to the embodiment of the disclosure, the gas detection module is used for detecting the gas which enters the gas detection chamber after being separated by the degassing module, and transmitting the detection data to the processing control module; the processing control module processes the detection data to determine the type and content of the gas in the fluid to be monitored, so that the fluid does not need to be taken out of the fluid container, the circulation process of the fluid in the fluid container is not influenced, and the real-time monitoring is favorably realized. Meanwhile, the detection method does not need consumables such as chromatographic columns, carrier gas and the like, and is low in cost. In addition, the processing control module can also display, store and upload the monitoring results so as to realize management of data storage, display and uploading overall.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The transformer on-line monitoring device is characterized by comprising a degassing module, a gas detection module, a processing control module and a protective shell;
the protective shell is connected with a fluid container of the transformer, and a fluid passing port is arranged between the protective shell and the fluid container;
the degassing module is arranged in the protective shell and used for isolating partial space in the protective shell to form a gas detection chamber, the degassing module is used for separating a fluid to be monitored and gas dissolved in the fluid to enable the separated gas to enter the gas detection chamber, and the separated fluid is isolated outside the gas detection chamber;
the gas detection module is used for detecting gas in the gas detection chamber and transmitting detection data to the processing control module;
and the processing control module is in communication connection with the gas detection module and is used for determining the type and the content of the gas in the fluid to be monitored according to the detection data.
2. The on-line transformer monitoring device according to claim 1, wherein the gas detection module is disposed in the gas detection chamber.
3. The on-line transformer monitoring device according to claim 1, wherein the degassing module comprises a degassing membrane and a microporous substrate;
the degassing membrane is attached to one side of the microporous substrate, which is far away from the gas detection chamber.
4. The on-line transformer monitoring device according to claim 3, further comprising a protection screen attached to a side of the degassing membrane facing the fluid to be monitored.
5. The on-line transformer monitoring device according to claim 4, wherein the protection screen and the protection housing are made of stainless steel.
6. The on-line transformer monitoring device of claim 1, wherein the gas detection module comprises at least one gas sensor.
7. The transformer on-line monitoring device according to claim 1, further comprising a temperature control module and a moisture detection module, wherein the temperature control module and the moisture detection module are both fixed in the protective housing and are arranged on one side of the protective housing, which is communicated with the space to be monitored; the temperature control module and the moisture detection module are in communication connection with the processing control module;
the temperature control module is used for monitoring the temperature of the fluid to be monitored;
the moisture detection module is used for monitoring the moisture content in the fluid to be monitored.
8. The on-line transformer monitoring device according to claim 1, wherein the fluid container comprises a ball valve, and the on-line transformer monitoring device is fixedly mounted on the ball valve of the transformer by a wall-hanging method.
9. An online transformer monitoring method, which is implemented by applying the online transformer monitoring device of any one of claims 1 to 8, the online transformer monitoring method comprising:
the gas detection module detects gas in the gas detection chamber and transmits detection data to the processing control module; the gas is the gas which enters the gas detection chamber after the fluid to be monitored is separated by the degassing module;
and the processing control module determines the type and content of the gas in the fluid to be monitored according to the detection data.
10. The transformer online monitoring method according to claim 9, wherein the processing control module comprises a signal conversion sub-module, a signal processing sub-module and a status display sub-module; the processing control module determining the type and content of the gas in the fluid to be monitored according to the detection data comprises:
the signal conversion sub-module converts the detection data into a standardized signal and transmits the standardized signal to the signal processing sub-module;
the signal processing submodule processes the standardized signal, determines the type and content of gas in the fluid to be monitored, and transmits the gas to the state display submodule;
and the state display submodule displays the gas type and content in the fluid to be monitored.
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