CN218470894U - Equipment partial discharge alarm device based on pulse current method - Google Patents
Equipment partial discharge alarm device based on pulse current method Download PDFInfo
- Publication number
- CN218470894U CN218470894U CN202221800948.1U CN202221800948U CN218470894U CN 218470894 U CN218470894 U CN 218470894U CN 202221800948 U CN202221800948 U CN 202221800948U CN 218470894 U CN218470894 U CN 218470894U
- Authority
- CN
- China
- Prior art keywords
- signal
- miniature high
- partial discharge
- pulse current
- frequency sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The application belongs to the technical field of uninterrupted power supply detection, and relates to a device partial discharge warning device based on a pulse current method, which comprises a miniature high-frequency sensor, a signal coupler, a signal acquisition device and a data processing terminal; the miniature high-frequency sensor can detect pulse current signals and acquire signals with higher strength and higher reliability; the miniature high-frequency sensor transmits signals to the signal coupler, the signal coupler couples and converts pulse current generated by partial discharge into voltage signals, and therefore a subsequent signal acquisition device can accurately acquire the voltage signals and can accurately judge whether partial discharge is generated. Through miniature high frequency sensor response and coupling discharge signal, improved the sensitivity of signal detection, it is convenient to detect, simple structure, signal transmission are stable, have effectively solved the installation scheme signal sensitivity that does not have a power failure low, the complicated problem of maintenance or distribution equipment.
Description
Technical Field
The application belongs to the technical field of uninterrupted power supply detection, and particularly relates to a device partial discharge warning device based on a pulse current method.
Background
In recent years, with the rapid development of a non-outage detection technology (live detection and online monitoring) of power grid equipment, a plurality of equipment latent defects are discovered through field actual measurement, and a large number of faults are avoided. Based on the maturity and wide use of technologies such as state detection, most of the main state quantities of the equipment which originally need to be obtained by power failure routine tests can be obtained by using a state detection means. On one hand, by adopting a state detection technology, the online detection device is additionally arranged by increasing the number of electrified detection times, the state quantity of the equipment is acquired more timely than a periodic maintenance mode, and the state of the equipment is dynamically evaluated, so that the state of the equipment is really mastered in real time; on the other hand, the power failure frequency of the equipment can be effectively reduced, the operation frequency is reduced, the power grid risk is reduced, the availability factor of the equipment and the system reliability are improved, and great social and economic benefits are generated.
In recent years, there have been many detection means for the problems such as insulation damage, for example, inspection equipment such as transient ground voltage detection and ultrasonic detection, and the above detection schemes all play a certain role in solving the problems of partial discharge faults of the types such as insulation damage, but the existing partial discharge detection schemes also have many defects. The method is characterized by comprising the following aspects:
1) The detection sensitivity is low. The partial discharge detection of the indirect method is a detection technology generated based on the research on the partial discharge concomitant phenomenon, and the detection on the partial discharge is realized by detecting the partial discharge concomitant signals, however, the signals have the characteristics of low signal intensity, easy external interference tolerance and the like, so that the detection accuracy and the referential property are low.
2) The operation and maintenance detection scheme of the current distribution equipment in China is periodic inspection, and the state inspection period of the distribution network equipment is generally performed according to the regulations of field application guide (approval draft) of the transient earth voltage partial discharge live test technology of the alternating current metal closed switch equipment 1-2 times per year. Defects and intermittent discharge accidents occurring in the detection period cannot be timely discovered. Therefore, the insulation defect occurring at a certain moment in the middle of two routing inspection activities is often overlooked.
3) The existing detection equipment causes the state inspection activity to have a blind area due to the limitation of the range of the frequency band of the detected signal. The frequency band range of the current transient voltage detection technology is generally designed to be 3 MHz-100 MHz, and the frequency band of the ultrasonic detection technology is fixedly designed to be 40kHz.
4) Distribution network equipment has widely adopted an all-metal closed structure, and the quantity of open type switch equipment is less and less. The local discharge companion signal that the internal portion of cabinet produced, like signals such as electromagnetic radiation signal, sound because the hand trembles the shielding effect at the metal cabinet body at the in-process of outside transmission, hardly transmits out, even transmit out, also can great by the weakening, current check out test set is hardly accurate to catching the signal in the external detection of cabinet to the signal, causes the detection effect unsatisfactory.
5) Most existing detection equipment functions only stop on helping operation and maintenance personnel to find problems, operation and maintenance personnel are few, distribution equipment is large in quantity, operation and maintenance modes are complex, most operation and maintenance personnel utilize handheld equipment to carry out relevant tests on distribution equipment, detection efficiency is low, and processing faults are not timely.
6) Many equipment do not satisfy the installation scheme that does not have a power failure on the market, and most on-line monitoring equipment all needs the cubical switchboard to cut off the power supply operation at present, not only influences whole power supply system, and installation steps are loaded down with trivial details moreover.
In view of the above, it is desirable to provide a partial discharge warning device that is simple and efficient and has high measurement accuracy.
Disclosure of Invention
The application aims to provide an equipment partial discharge alarm device based on a pulse current method, and the device is used for solving the problems that in the prior art, a detection precision of a non-power-off detection device for equipment partial discharge is low or equipment is complex.
The technical scheme of the application is as follows: a device partial discharge alarm device based on a pulse current method comprises a miniature high-frequency sensor, a signal coupler, a signal acquisition device and a data processing terminal; the miniature high-frequency sensor is arranged on a signal cable to be detected, the input end of the signal coupler is connected with the miniature high-frequency sensor, the signal acquisition device is connected with the output end of the signal coupler, and the output end of the signal acquisition device is connected with the data processing terminal.
Preferably, the detection frequency band of the miniature high-frequency sensor ranges from 0.15 MHz to 100MHz.
Preferably, the miniature high frequency sensor is snapped onto the signal cable of the charged indicator of the secondary chamber.
Preferably, the micro high-frequency sensors have multiple groups, each group of micro high-frequency sensors is registered in the data processing terminal and is provided with a label, and the data processing terminal is provided with a display screen which respectively displays real-time detection data of different micro high-frequency sensors.
The device partial discharge warning device based on the pulse current method comprises a micro high-frequency sensor, a signal coupler, a signal acquisition device and a data processing terminal; the miniature high-frequency sensor can detect pulse current signals and acquire signals with higher strength and higher reliability; the miniature high-frequency sensor transmits signals to the signal coupler, the signal coupler couples and converts pulse current generated by partial discharge into voltage signals, and therefore a subsequent signal acquisition device can accurately acquire the voltage signals and can accurately judge whether partial discharge is generated. Through miniature high frequency sensor induction and coupling discharge signal, effectively solved distribution equipment's all metal enclosed construction and detected the difficulty that causes to the fault signal, improved signal detection's sensitivity, it is convenient to detect, simple structure, signal transmission are stable, have effectively solved the installation scheme signal sensitivity that does not have a power failure low, the problem of maintenance or distribution equipment complicacy.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
Fig. 1 is a schematic view of the overall structure of the present application.
1. A miniature high frequency sensor; 2. a signal coupler; 3. a signal acquisition device; 4. a charged indicator.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
A device partial discharge alarm device based on a pulse current method is disclosed, as shown in figure 1, and comprises a micro high-frequency sensor 1, a signal coupler 2, a signal acquisition device 3 and a data processing terminal; miniature high frequency sensor 1 installs on the signal cable that needs detected, and the input of signal coupler 2 links to each other with miniature high frequency sensor 1, and signal acquisition device 3 links to each other with the output of signal coupler 2, and the output of signal acquisition device 3 links to each other with data processing terminal.
The miniature high-frequency sensor 1 can detect pulse current signals and acquire signals with higher strength and higher reliability; the micro high-frequency sensor 1 transmits signals to the signal coupler 2, the signal coupler 2 couples and converts pulse current generated by partial discharge into voltage signals, and therefore the subsequent signal acquisition device 3 can accurately acquire the voltage signals and can accurately judge whether the partial discharge is generated.
Through miniature high frequency sensor 1 response and coupling discharge signal, effectively solved the all metal enclosed construction of distribution equipment and detected the difficulty that causes to the fault signal, improved signal detection's sensitivity, it is convenient to detect, simple structure, signal transmission are stable, have effectively solved the installation scheme signal sensitivity that does not have a power failure low, the problem of maintenance or distribution equipment complicacy.
Meanwhile, the miniature high-frequency sensor 1 is not arranged on the switch cabinet, so that the power failure operation of the switch cabinet is not needed, the whole power supply system cannot be influenced, and the installation is convenient.
The signal acquisition device 3 is internally provided with a signal acquisition chip, receives and processes the voltage signal output by the signal coupler 2, and outputs the processed voltage signal, and each signal acquisition device 3 can simultaneously receive induction signals of a plurality of groups of micro high-frequency sensors 1, and preferably has three groups.
The data processing terminal receives the voltage signal output by the signal acquisition device 3, analyzes and processes the signal, and after the voltage signal exceeds a certain set threshold value, the partial discharge is generated at the position corresponding to the miniature high-frequency sensor 1, and an alarm is given out through an alarm device. The data processing terminal can receive signals collected by a plurality of groups of collectors simultaneously, namely whether discharge faults occur in different devices or not is processed simultaneously, and the data processing terminal and the signal collecting device 3 can be connected in various modes such as an Ethernet port and an RS485 interface. The data processing terminal may be a computer or a separate data processing device.
Preferably, the detection frequency band range of the miniature high-frequency sensor 1 is 0.15-100 MHz, which can effectively avoid the 'blind zone' existing in the existing partial discharge detection scheme.
Preferably, the miniature high-frequency sensor 1 is fastened on a signal cable of the charged indicator 4 of the secondary chamber, particularly between the coupled inductor three-phase circuit and the charged indicator 4, and the installation is convenient.
Preferably, the micro high-frequency sensors 1 have multiple groups, in order to accurately display the sensing conditions of the micro high-frequency sensors 1 at different positions, each group of micro high-frequency sensors 1 is registered and labeled in the data processing terminal, a display screen is arranged on the data processing terminal and is used for respectively displaying the real-time detection data of different micro high-frequency sensors 1, and thus, the signal sensing data of different micro high-frequency sensors 1 and the abnormal conditions of corresponding equipment can be simultaneously checked through the display screen.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides an equipment partial discharge alarm device based on pulse current method which characterized in that: the system comprises a miniature high-frequency sensor (1), a signal coupler (2), a signal acquisition device (3) and a data processing terminal; the miniature high-frequency sensor (1) is installed on a signal cable needing to be detected, the input end of the signal coupler (2) is connected with the miniature high-frequency sensor (1), the signal acquisition device (3) is connected with the output end of the signal coupler (2), and the output end of the signal acquisition device (3) is connected with the data processing terminal.
2. The apparatus partial discharge alarm device based on the pulse current method as claimed in claim 1, wherein: the detection frequency band range of the miniature high-frequency sensor (1) is 0.15-100 MHz.
3. The apparatus partial discharge alarm device based on the pulse current method as claimed in claim 1, wherein: the miniature high-frequency sensor (1) is fastened on a signal cable of a charged indicator (4) of the secondary chamber.
4. The apparatus partial discharge alarm device based on the pulse current method as claimed in claim 1, wherein: the miniature high-frequency sensors (1) are provided with a plurality of groups, each group of miniature high-frequency sensors (1) are registered in a data processing terminal and are provided with labels, and the data processing terminal is provided with a display screen which respectively displays real-time detection data of different miniature high-frequency sensors (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221800948.1U CN218470894U (en) | 2022-07-12 | 2022-07-12 | Equipment partial discharge alarm device based on pulse current method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221800948.1U CN218470894U (en) | 2022-07-12 | 2022-07-12 | Equipment partial discharge alarm device based on pulse current method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218470894U true CN218470894U (en) | 2023-02-10 |
Family
ID=85135766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221800948.1U Active CN218470894U (en) | 2022-07-12 | 2022-07-12 | Equipment partial discharge alarm device based on pulse current method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218470894U (en) |
-
2022
- 2022-07-12 CN CN202221800948.1U patent/CN218470894U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103135038B (en) | Straight-flow system exchanges crosstalk and insulation fault monitoring selection method | |
| CN105911499B (en) | Ultrasonic wave shelf depreciation metering system and method under site environment | |
| CN104569680A (en) | Testing device and method for DC/DC converter | |
| CN203241494U (en) | Direct current system AC series current fault and insulation fault monitoring line-selection apparatus | |
| CN102129763A (en) | CVT (Capacitor Voltage Transformer) online monitoring system | |
| CN103954815A (en) | Electricity larceny prevention check main machine | |
| KR20180031454A (en) | Appartus and method monitoring insulator strings | |
| CN205484727U (en) | Wireless battery system of patrolling and examining | |
| CN112782540A (en) | High-voltage cable on-line monitoring and fault point positioning device | |
| CN111426342A (en) | State diagnosis device and method for high-voltage ring main unit | |
| CN104931798B (en) | The source range impulsive measurement device and its detection localization method of out-pile Nuclear Instrument system | |
| CN112904147B (en) | Power transmission line fault and pre-discharge monitoring device and signal processing method | |
| CN113642478A (en) | Intelligent operation and maintenance platform | |
| CN103675613B (en) | Transformer station DC system movable type insulation supervision instrument | |
| CN218470894U (en) | Equipment partial discharge alarm device based on pulse current method | |
| CN203658521U (en) | Mobile insulation supervision instrument of transformer station DC system | |
| CN202794326U (en) | Online monitoring device for grounding current of transformer core | |
| CN115656738A (en) | Online switch cabinet partial discharge monitoring system and method | |
| CN103728527B (en) | System for monitoring fault of loop on multi-bus section of direct current system | |
| CN115291050A (en) | Equipment partial discharge alarm device based on pulse current method | |
| CN108761297A (en) | A kind of dry-type air-core reactor partial discharges fault on-line computing model based on high-frequency signal | |
| CN110146863B (en) | Hump radar equipment online monitoring system and hump radar equipment online monitoring method | |
| CN203984098U (en) | A kind of device for quick testing of powerline network | |
| CN208780776U (en) | Dry-type air-core reactor partial discharges fault on-line computing model based on high-frequency signal | |
| CN203178422U (en) | Partial discharge measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |