CN217931886U - Detecting and positioning device - Google Patents
Detecting and positioning device Download PDFInfo
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- CN217931886U CN217931886U CN202221082585.2U CN202221082585U CN217931886U CN 217931886 U CN217931886 U CN 217931886U CN 202221082585 U CN202221082585 U CN 202221082585U CN 217931886 U CN217931886 U CN 217931886U
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Abstract
The application discloses a detection and positioning device, which comprises a capacitive voltage divider, at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one, and the detection and positioning device can judge whether partial discharge occurs and position the position of the partial discharge.
Description
Technical Field
The present application relates to the field of high voltage electrical apparatus detection technologies, and more particularly, to a detection and positioning device.
Background
The cubical switchboard partial discharge is different from the remarkable characteristic of other power equipment partial discharge and is that discharge equipment is various and the type of discharging is various, mainly because the cubical switchboard has integrateed multiple power equipment in minimum space, includes: through cabinet bushings, bus bars and lead bars, circuit breakers, disconnectors, lightning arresters, cable terminations, post insulators, etc., partial discharges may occur. Therefore, the switch cabinet partial discharge monitoring must solve two problems: 1. measuring the partial discharge amount; 2. localization of the partial discharge source.
The pulse current method is a detection method which is the earliest and most widely used in research, wherein each partial discharge is neutralized by positive and negative charges, and a steep current pulse is accompanied, and the pulse current method is used for detecting the occurrence of the partial discharge by measuring the pulse current; the pulse current method is generally used in a model test of electrical equipment when the electrical equipment leaves a factory and other off-line tests, and has the advantage of high off-line measurement sensitivity, but the method is not widely applied to on-line monitoring of partial discharge of the electrical equipment.
At present, the partial discharge detection and positioning of the switch cabinet mostly adopt one or more methods of a Transient Earth Voltage (TEV) method, an ultrasonic wave method and an ultrahigh frequency method for combined use, but the methods have the problems:
1. the detection value is dB (decibel) value, but not pC value specified by the partial discharge detection standard GB/T7254 and IEC60270, the existence of partial discharge can be qualitatively analyzed, and the severity of partial discharge cannot be quantitatively analyzed. The partial discharge quantization index of the pC value adopted by the pulse current method is widely applied by electric power practitioners, forms an industry consensus, and can be used as an absolute index for evaluating the insulation state.
2. The detection means adopts an open type sensing unit, so that the anti-interference capability is poor, and the detection sensitivity is not high.
3. The positioning operation process is complex, and professional testers are required to identify the detected signals, so that the detection efficiency is low.
Disclosure of Invention
The application provides a detect and positioner, can the partial discharge of quantitative detection cubical switchboard to can carry out accurate location to partial discharge's position.
The application provides a detection and positioner is applied to the cubical switchboard, the cubical switchboard includes high tension apparatus, high tension apparatus includes insulating core, insulating core includes main insulating capacitor and divider capacitance, wherein, divider capacitance be with the independent electric capacity that main insulating capacitor establishes ties perhaps does main insulating capacitor's electric capacity is taken a percentage, main insulating capacitor is connected with the high-voltage line.
The detection and positioning device comprises at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one;
each ultrasonic sensor in the at least one ultrasonic sensor is respectively attached to the shell of the switch cabinet;
each pulse signal receiving unit in the at least one pulse signal receiving unit is configured to acquire pulse signals from two polar plates of the voltage division capacitor, wherein the pulse signals are generated by partial discharge of the switch cabinet;
each ultrasonic signal receiving unit is connected with the corresponding ultrasonic sensor and is used for receiving the ultrasonic signals detected by the corresponding ultrasonic sensor;
the signal processing unit is used for respectively filtering and amplifying the acquired pulse signal and the received ultrasonic signal;
the analysis and diagnosis unit is arranged to judge whether the partial discharge occurs according to the pulse signal processed by the signal processing unit, and position the position of the partial discharge according to the ultrasonic signal processed by the signal processing unit.
In an exemplary embodiment, the apparatus further comprises a communication unit;
the communication unit is set to be communicated with the upper computer and/or the mobile client so as to display and/or prompt the local discharge information.
In an exemplary embodiment, the apparatus further comprises a human-computer interaction unit;
the human-computer interaction unit comprises a display unit;
the display unit is used for displaying the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises a storage unit;
the storage unit is used for storing the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises an auxiliary unit;
the auxiliary unit comprises an early warning module;
the early warning module is arranged to send out early warning information when the analysis and diagnosis unit judges that the partial discharge occurs;
the early warning template comprises an acousto-optic warning element which is set to give out acousto-optic warning according to the early warning information.
The application provides another kind of detection and positioner, is applied to the cubical switchboard.
The detection and positioning device comprises a capacitive voltage divider, at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one;
each ultrasonic sensor in the at least one ultrasonic sensor is attached to the shell of the switch cabinet respectively;
the capacitive voltage divider comprises a first capacitor and a second capacitor which are connected in series, and the first capacitor is connected with a high-voltage wire;
each pulse signal receiving unit in the at least one pulse signal receiving unit is configured to obtain a pulse signal from two plates of the second capacitor, wherein the pulse signal is generated by partial discharge of the switch cabinet;
each ultrasonic signal receiving unit is connected with the corresponding ultrasonic sensor and is used for receiving the ultrasonic signals detected by the corresponding ultrasonic sensor;
the signal processing unit is used for respectively filtering and amplifying the acquired pulse signal and the received ultrasonic signal;
the analysis and diagnosis unit is arranged to judge whether the partial discharge occurs according to the pulse signal processed by the signal processing unit, and position the position of the partial discharge according to the ultrasonic signal processed by the signal processing unit.
In an exemplary embodiment, the apparatus further comprises a communication unit;
the communication unit is arranged to transmit the detected pulse signals and/or ultrasonic signals, and signal processing results and/or operation results to the upper computer and/or the mobile client.
In an exemplary embodiment, the apparatus further comprises a human-computer interaction unit;
the human-computer interaction unit comprises a display unit;
and the display unit is used for displaying the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises a storage unit;
the storage unit is used for storing the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
The device further comprises an auxiliary unit;
the auxiliary unit comprises an early warning module;
the early warning module is arranged to send out early warning information when the analysis and diagnosis unit judges that the partial discharge occurs;
the early warning template comprises an acousto-optic warning element which is set to send out acousto-optic warning according to the early warning information.
In an exemplary embodiment, the capacitive voltage divider is a capacitive voltage divider of the charged display device.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The drawings are intended to provide an understanding of the present disclosure, and are to be considered as forming a part of the specification, and are to be used together with the embodiments of the present disclosure to explain the present disclosure without limiting the present disclosure.
FIG. 1 is a schematic view of a first detecting and positioning device according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a second detecting and positioning device according to an embodiment of the present disclosure.
Detailed Description
Fig. 1 is a schematic diagram of a first detection and positioning device in an embodiment of the present application, and as shown in fig. 1, the detection and positioning device in this embodiment is applied to a switch cabinet, the switch cabinet includes a high-voltage device, the high-voltage device includes an insulating core, the insulating core includes a main insulating capacitor and a voltage-dividing capacitor, wherein the voltage-dividing capacitor is an independent capacitor connected in series with the main insulating capacitor or a capacitor tap of the main insulating capacitor, and the main insulating capacitor is connected to a high-voltage line.
The detecting and locating device shown in fig. 1 comprises at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit, and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one;
each ultrasonic sensor in the at least one ultrasonic sensor is respectively attached to the shell of the switch cabinet;
each pulse signal receiving unit in the at least one pulse signal receiving unit is configured to obtain a pulse signal from two plates of the voltage division capacitor, wherein the pulse signal is generated by partial discharge of the switch cabinet;
each ultrasonic signal receiving unit is connected with a corresponding ultrasonic sensor and is used for receiving ultrasonic signals detected by the corresponding ultrasonic sensor;
the signal processing unit is used for respectively filtering and amplifying the acquired pulse signal and the received ultrasonic signal;
the analysis and diagnosis unit is arranged to judge whether the partial discharge occurs according to the pulse signal processed by the signal processing unit, and position the position of the partial discharge according to the ultrasonic signal processed by the signal processing unit.
In an exemplary embodiment, the ultrasonic signal may be generated by a partial discharge of the switchgear or by external interference.
In an exemplary embodiment, the pulse current signal is detected by a voltage dividing capacitor, and the ultrasonic wave signal is detected by an ultrasonic sensor. And when the partial discharge amount obtained through the pulse current signal exceeds a partial discharge threshold value, judging that the insulation defect exists. And carrying out noise elimination processing on the ultrasonic signals based on the pulse current signals and judging the position of the insulation defect according to the processed ultrasonic signals. The noise elimination processing of the ultrasonic signal based on the pulse current signal comprises the steps of synchronously receiving the pulse current signal and the ultrasonic signal, and if data comparison is carried out, only the ultrasonic signal is detected, and no pulse signal exists, the ultrasonic signal is judged to be an interference signal.
In an exemplary embodiment, the location of the insulation defect may be determined by moving the location of the ultrasonic sensor until the amount of signal from the ultrasonic sensor is maximized; after the partial discharge position of the switch cabinet is determined, a user can cut off power and remove faults. Furthermore, the detection and positioning device is used for positioning the partial discharge position when detecting the pulse current signal and the partial discharge amount is greater than the partial discharge threshold value.
In an exemplary embodiment, the voltage dividing capacitor is an independent capacitor independent of and in series with the main insulation capacitor; or the voltage division capacitor is a capacitor tap of the main insulation capacitor. Furthermore, the main insulating capacitor is composed of a plurality of capacitor screens wound alternately with insulating layers; the voltage division capacitor is composed of a plurality of capacitor screens which are wrapped outside the main insulating capacitor and are wound with insulating layers alternately; or the voltage division capacitor comprises at least one capacitor screen at the outermost side of the main insulation capacitor.
In an exemplary embodiment, the high voltage device comprises an arrester with a voltage tap (i.e. a voltage dividing capacitor), a through-cabinet bushing or a cable termination.
In an exemplary embodiment, the ultrasonic sensor may be a plurality of ultrasonic sensors, the plurality of ultrasonic sensors are respectively attached to the switch cabinet housing of the switch cabinet, and each ultrasonic sensor is correspondingly connected to the ultrasonic signal receiving unit in the detecting and positioning device.
In an exemplary embodiment, the apparatus further comprises a communication unit;
the communication unit is arranged to transmit the detected pulse signals and/or ultrasonic signals, and signal processing results and/or operation results to the upper computer and/or the mobile client.
In an exemplary embodiment, the apparatus further comprises a human-computer interaction unit;
the human-computer interaction unit comprises a display unit;
and the display unit is used for displaying the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises a storage unit;
the storage unit is used for storing the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises an auxiliary unit;
the auxiliary unit comprises an early warning module;
the early warning module is arranged to send out early warning information when the analysis and diagnosis unit judges that the partial discharge occurs;
the early warning template comprises an acousto-optic warning element which is set to send out acousto-optic warning according to the early warning information.
In an exemplary embodiment, the auxiliary unit further comprises an input keyboard for parameter configuration or other operations.
The application provides a detect and positioner, can the partial discharge of quantitative detection cubical switchboard to can carry out accurate location to partial discharge's position, and improve the interference killing feature of signal through partial pressure capacitive coupling.
Fig. 2 is a schematic view of a second detecting and positioning device according to an embodiment of the present disclosure, and as shown in fig. 2, the detecting and positioning device according to the embodiment is applied to a switch cabinet.
The detecting and locating device shown in fig. 2 comprises a capacitive voltage divider, at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit, and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one;
each ultrasonic sensor in the at least one ultrasonic sensor is attached to the shell of the switch cabinet respectively;
the capacitive voltage divider comprises a first capacitor and a second capacitor which are connected in series, and the first capacitor is connected with a high-voltage line;
each pulse signal receiving unit in the at least one pulse signal receiving unit is configured to obtain a pulse signal from two plates of the second capacitor, wherein the pulse signal is generated by partial discharge of the switch cabinet;
each ultrasonic signal receiving unit is connected with a corresponding ultrasonic sensor and is used for receiving ultrasonic signals detected by the corresponding ultrasonic sensor;
the signal processing unit is used for respectively filtering and amplifying the acquired pulse signal and the received ultrasonic signal;
the analysis and diagnosis unit is arranged to judge whether the partial discharge occurs according to the pulse signal processed by the signal processing unit, and position the position of the partial discharge according to the ultrasonic signal processed by the signal processing unit.
In an exemplary embodiment, the pulsed current signal is detected by the second capacitor and the ultrasonic signal is detected by the ultrasonic sensor. When the partial discharge amount obtained by the pulse current signal exceeds a partial discharge threshold, it is determined that partial discharge has occurred. And carrying out noise elimination processing on the ultrasonic signal based on the pulse current signal and judging the position of partial discharge according to the processed ultrasonic signal.
In an exemplary embodiment, the location of the partial discharge may be determined by moving the location of the ultrasonic sensor until the amount of signal from the ultrasonic sensor is maximized; after the partial discharge position of the switch cabinet is determined, a user can cut off power and remove faults. Furthermore, the detecting and positioning device positions the partial discharge position when detecting the pulse current signal and the partial discharge amount is greater than the partial discharge threshold.
In an exemplary embodiment, the detecting and positioning device shown in fig. 2 can detect and position a high voltage device including an arrester with a voltage tap (i.e., the second capacitor), a bushing or a cable terminal, or can detect and position a high voltage device without a voltage tap.
In an exemplary embodiment, the number of the ultrasonic sensors may be multiple, the multiple ultrasonic sensors are respectively attached to a switch cabinet casing of the switch cabinet, and each ultrasonic sensor is correspondingly connected to an ultrasonic signal receiving unit in the detection and positioning device.
In an exemplary embodiment, the apparatus further comprises a communication unit;
the communication unit is arranged to transmit the detected pulse signals and/or ultrasonic signals, and signal processing results and/or operation results to the upper computer and/or the mobile client.
In an exemplary embodiment, the apparatus further comprises a human-computer interaction unit;
the human-computer interaction unit comprises a display unit;
and the display unit is used for displaying the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises a storage unit;
the storage unit is used for storing the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
In an exemplary embodiment, the apparatus further comprises an auxiliary unit;
the auxiliary unit comprises an early warning module;
the early warning module is arranged to send out early warning information when the analysis and diagnosis unit judges that the partial discharge occurs;
the early warning template comprises an acousto-optic warning element which is set to send out acousto-optic warning according to the early warning information.
In an exemplary embodiment, the auxiliary unit includes an input keyboard for parameter configuration or other operations.
In an exemplary embodiment, the capacitive voltage divider is a capacitive voltage divider of the charged display device.
In an exemplary embodiment, the capacitive voltage divider may be multiple, and may correspond to the pulse signal receiving unit one to one, or may be many to one.
The application provides a detect and positioner can the partial discharge of quantitative detection cubical switchboard to can carry out accurate location to partial discharge's position, and improve the interference killing feature of signal through the second capacitive coupling.
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
Any features shown and/or discussed in this application may be implemented separately or in any suitable combination.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
Claims (10)
1. A detection and positioning device is applied to a switch cabinet, the switch cabinet comprises high-voltage equipment, the high-voltage equipment comprises an insulating core body, the insulating core body comprises a main insulating capacitor and a voltage dividing capacitor, the voltage dividing capacitor is an independent capacitor connected with the main insulating capacitor in series or a capacitor tap of the main insulating capacitor, the main insulating capacitor is connected with a high-voltage wire,
comprises at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one;
each ultrasonic sensor in the at least one ultrasonic sensor is attached to the shell of the switch cabinet respectively;
each pulse signal receiving unit in the at least one pulse signal receiving unit is configured to obtain a pulse signal from two plates of the voltage division capacitor, wherein the pulse signal is generated by partial discharge of the switch cabinet;
each ultrasonic signal receiving unit is connected with the corresponding ultrasonic sensor and is used for receiving the ultrasonic signals detected by the corresponding ultrasonic sensor;
the signal processing unit is used for respectively filtering and amplifying the acquired pulse signal and the received ultrasonic signal;
the analysis and diagnosis unit is used for judging whether partial discharge occurs according to the pulse signal processed by the signal processing unit and positioning the position of the partial discharge according to the ultrasonic signal processed by the signal processing unit.
2. The apparatus of claim 1,
the device also comprises a communication unit;
the communication unit is set to be communicated with the upper computer and/or the mobile client so as to display and/or prompt the local discharge information.
3. The apparatus of claim 1,
the device also comprises a human-computer interaction unit;
the human-computer interaction unit comprises a display unit;
the display unit is used for displaying the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
4. The apparatus of claim 1,
the apparatus further includes a storage unit;
the storage unit is used for storing the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
5. The apparatus of any one of claims 1-4,
the device further comprises an auxiliary unit;
the auxiliary unit comprises an early warning module;
the early warning module is used for sending out early warning information when the analysis and diagnosis unit judges that the partial discharge occurs;
the early warning module comprises an acousto-optic warning element which is set to give out acousto-optic warning according to the early warning information.
6. A detection and positioning device is applied to a switch cabinet and is characterized in that,
the ultrasonic diagnosis device comprises a capacitive voltage divider, at least one pulse signal receiving unit, at least one ultrasonic signal receiving unit, a signal processing unit, an analysis and diagnosis unit and at least one ultrasonic sensor; the ultrasonic signal receiving units correspond to the ultrasonic sensors one by one;
each ultrasonic sensor in the at least one ultrasonic sensor is attached to the shell of the switch cabinet respectively;
the capacitive voltage divider comprises a first capacitor and a second capacitor which are connected in series, and the first capacitor is connected with a high-voltage line;
each pulse signal receiving unit in the at least one pulse signal receiving unit is configured to obtain a pulse signal from two plates of the second capacitor, wherein the pulse signal is generated by partial discharge of the switch cabinet;
each ultrasonic signal receiving unit is connected with a corresponding ultrasonic sensor and is used for receiving ultrasonic signals detected by the corresponding ultrasonic sensor;
the signal processing unit is used for filtering and amplifying the acquired pulse signal and the received ultrasonic signal respectively;
the analysis and diagnosis unit is arranged to judge whether the partial discharge occurs according to the pulse signal processed by the signal processing unit, and position the position of the partial discharge according to the ultrasonic signal processed by the signal processing unit.
7. The apparatus of claim 6,
the device further comprises a communication unit;
and the communication unit is set to transmit the detected pulse signals and/or ultrasonic signals, and signal processing results and/or operation results to the upper computer and/or the mobile client.
8. The apparatus of claim 6,
the device also comprises a human-computer interaction unit;
the human-computer interaction unit comprises a display unit;
and the display unit is used for displaying the data received by the signal processing unit and the operation result of the analysis and diagnosis unit.
9. The apparatus of claim 6,
the apparatus further comprises a storage unit;
the storage unit is used for storing the data received by the signal processing unit and the operation result of the analysis and diagnosis unit;
the device further comprises an auxiliary unit;
the auxiliary unit comprises an early warning module;
the early warning module is arranged to send out early warning information when the analysis and diagnosis unit judges that the partial discharge occurs;
the early warning module comprises an acousto-optic warning element which is set to give out acousto-optic warning according to the early warning information.
10. The apparatus of any one of claims 6-9,
the capacitive voltage divider is a capacitive voltage divider of the electrified display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221082585.2U CN217931886U (en) | 2022-05-07 | 2022-05-07 | Detecting and positioning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221082585.2U CN217931886U (en) | 2022-05-07 | 2022-05-07 | Detecting and positioning device |
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| CN217931886U true CN217931886U (en) | 2022-11-29 |
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| CN202221082585.2U Active CN217931886U (en) | 2022-05-07 | 2022-05-07 | Detecting and positioning device |
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