CN115389872A - Handheld switch cabinet partial discharge polling instrument based on capacitive coupling method and method thereof - Google Patents
Handheld switch cabinet partial discharge polling instrument based on capacitive coupling method and method thereof Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/16—Construction of testing vessels; Electrodes therefor
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Abstract
The invention discloses a handheld switch cabinet partial discharge polling instrument based on a capacitive coupling method and a method thereof, wherein the handheld switch cabinet partial discharge polling instrument comprises a discharge detection shell, a data analysis server and a single chip microcomputer, wherein an ultrasonic sensor, an ultraviolet sensor and a transmission antenna are arranged outside the discharge detection shell, the ultrasonic sensor and the ultraviolet sensor are respectively connected with the single chip microcomputer arranged inside the discharge detection shell through data lines, the single chip microcomputer is connected with the transmission antenna through the data lines, the single chip microcomputer is connected with a power supply device through a power line, and data are transmitted between the transmission antenna and the data analysis server through a GPRS network; the discharge is detected by using a method of combining sound and light in ultraviolet and ultrasonic, so that the limitation caused by a single detection method and the interference caused by environmental factors are avoided, and the accuracy and the anti-interference capability of the detection device are improved.
Description
Technical Field
The invention relates to the field of discharge detection of a power distribution network, in particular to a handheld switch cabinet partial discharge polling instrument based on a capacitive coupling method and a method thereof.
Background
Because the consistency of each switch cabinet in regions, operating environments, load conditions and equipment is different, the maintenance period and the working content are also different; if the traditional inspection mode is adopted, personnel, materials and time are wasted; due to the influence of different external factors (such as temperature, humidity, thunderstorm, external force and the like), if a fault is not found in time, small discharge can possibly cause a large accident; according to statistics, tens of switch cabinet accidents happen every year in a residential store, and most of accidents have different degrees of discharge in the early stage, so that the detection of the real-time discharge condition of the switch cabinet is urgent.
In the prior art, although many power companies adopt a method of inspection or monitoring for safety precaution of a switch cabinet, the applied technical means are various, such as infrared imaging, ultraviolet imaging, ultrasonic inspection and the like; however, due to the constraint of manpower, cost, interference and the like, the problem of monitoring the discharge of the switch cabinet at low cost is not solved.
For example, a "switch cabinet detection device" disclosed in chinese patent literature has a publication number CN104237584A, and includes problems of high detection cost, low detection sensitivity and accuracy, and the like.
Disclosure of Invention
The invention provides a switch cabinet discharge fault detection device and method based on an acousto-optic technology, aiming at solving the problems that the traditional detection device and method for detecting the discharge state of a switch cabinet by a power distribution network has high detection cost, low detection sensitivity and accuracy, poor anti-interference capability of a detection or detection system and the like, and the discharge is detected by using a method combining ultraviolet and ultrasonic waves, so that the limitation caused by a single detection method and the interference caused by environmental factors are avoided, and the accuracy and the anti-interference capability of the detection device are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a hand-held type cubical switchboard office puts and patrols and examines appearance based on capacitive coupling method, includes discharge detection casing, data analysis server and singlechip, discharges and detects the casing outside and be equipped with ultrasonic sensor, ultraviolet sensor and transmission antenna, ultrasonic sensor and ultraviolet sensor link to each other with installing at the inside singlechip of discharge detection casing through the data line respectively, the singlechip passes through the data line and links to each other with transmission antenna, and the singlechip passes through the power cord and links to each other with power supply unit, through GPRS network transmission data between transmission antenna and the data analysis server.
The discharge is detected by using a method of combining ultraviolet and ultrasonic waves, and the ultraviolet and ultrasonic waves complement each other to make up the respective defects; light and sound are always generated during discharging, and the light and the sound have relatively consistent change rules and characteristics due to synchronous generation of the light and the sound; therefore, acousto-optic information can be acquired through the ultrasonic collector and the ultraviolet collector, and the acquired acousto-optic information is analyzed according to the change rule and the characteristics of the consistency of the acousto-optic information, so that interference is effectively shielded, the detection sensitivity is further enhanced, and the limitation caused by a single detection method and the interference caused by environmental factors are avoided.
Preferably, the power supply device is a solar battery, the power supply device is a switch cabinet transformer, the solar battery is installed on the outer surface of the discharge detection shell and stably supplies power, faults of the detection device caused by power supply fluctuation are reduced, and the solar energy is used as clean energy to reduce waste of power supply resources of the switch cabinet.
Preferably, the ultraviolet sensor is connected with the ultraviolet signal acquisition circuit, and is used for acquiring ultraviolet signals emitted along with the discharge of the switch cabinet circuit, filtering and finally sending the acquired signals to the MCU.
Preferably, the ultrasonic sensor is connected with the ultrasonic signal acquisition circuit, ultrasonic signals emitted along with the discharge of the switch cabinet are acquired through the ultrasonic sensor, filtering processing is carried out, and finally the acquired signals are sent to the MCU.
Preferably, the single-chip microcomputer MCU receives analog signals sent by the ultraviolet signal acquisition circuit and the ultrasonic signal acquisition circuit, converts the analog signals into digital signals through the ADC, and sends data to be sent to the GPRS module after processing.
Preferably, the GPRS module receives data of the MCU, sends the data to the server through a GPRS network, each acquisition terminal is connected with the server through the GPRS network, sends a message to the server every hour, detects that the connection is normal, and uploads fault data when an emergency fault condition occurs.
The partial discharge is detected by using a method combining ultraviolet detection and ultrasonic detection, so that the limitation caused by single-method detection and the interference caused by environmental factors can be avoided; the generation of light and sound is accompanied during partial discharge, and the light and the sound have relatively consistent change rules and characteristics due to synchronous generation of the light and the sound; therefore, acousto-optic information can be acquired through the ultrasonic collector and the ultraviolet collector, and the acquired acousto-optic information is analyzed according to the consistency of the acousto-optic information.
Because partial discharge has the characteristics of long-term continuity or short-term continuity and the discharge intensity is suddenly and suddenly changed, the ultraviolet interference which is relatively stable in the natural world can be filtered according to the characteristics; the discharge information can be detected due to the sensitivity of the ultrasound to the discharge, but the sensitivity of the partial discharge ultrasound is reduced due to a plurality of external sound wave interference sources in the similar frequency range.
The ultraviolet light is combined with the ultrasonic light, so that respective defects can be mutually compensated, and the detection sensitivity is further enhanced; due to the uniqueness of the ultraviolet generation on the power equipment and the line, the detection accuracy is higher.
Preferably, the patrol instrument further comprises detection software, wherein the detection software receives the collected data from the server side through a preset protocol, performs numerical analysis on the received data, collects device numbers, geographic positions and collection time information in advance, processes and presents the collected data by taking time as a horizontal axis and signal intensity as a vertical axis.
A handheld switch cabinet partial discharge inspection method based on a capacitive coupling method specifically comprises the following steps:
step S1: installing a switch cabinet discharge fault detection device at a position 0.5-0.8 m above a switch cabinet transformer, and connecting a singlechip with a power supply device in a power supply module;
step S2: the switch cabinet discharge fault detection device in the step S1 detects the discharge states of an insulator, a link and a transformer in a switch cabinet to be detected in real time;
and step S3: when one of the insulator, the link or the transformer in the switch cabinet to be detected in the step S2 performs discharge work, the ultraviolet sensor firstly detects ultraviolet data generated by discharge and transmits the data to the singlechip;
and step S4: the single chip microcomputer in the step S3 immediately controls the ultrasonic sensor to collect ultrasonic data generated during discharging after receiving the ultraviolet data, and the ultrasonic data is fed back to the single chip microcomputer;
step S5: the single chip microcomputer MCU processes the data collected by the ultraviolet sensor in the step S3 and the data collected by the ultrasonic sensor in the step S4, and transmits the processed data to the data analysis server through the transmission antenna;
step S6: and (5) analyzing the ultraviolet data and the ultrasonic data by the data analysis server in the step S5 to judge the discharge levels of the insulator, the link and the transformer in the switch cabinet.
Wherein the discharge levels are set as follows: when the ultraviolet pulse frequency is less than 5 times and the ultrasonic conversion voltage is 1V, the discharge grade is first grade, so that the switch cabinet equipment is proved to have a slight discharge condition and can be mainly checked in regular routing inspection; when the ultraviolet pulse frequency is less than 10 times and more than or equal to 5 times and the ultrasonic conversion voltage is 2V, the discharge grade is two-stage, and the switch cabinet equipment is proved to have a large amount of discharge conditions and needs to be checked immediately; when the number of times of ultraviolet pulse is not less than 10 and the voltage of ultrasonic wave conversion is 3V, the discharge grade is three, which proves that the switch cabinet equipment has serious discharge condition and needs to be overhauled and replaced immediately.
The device and the method are used for detecting the discharge conditions of the insulator, the link and the transformer in the switch cabinet; when the system device is used, the system is arranged above a transformer of a switch cabinet at a distance of about 1 m, when an insulator or the transformer of the switch cabinet discharges due to faults, an ultraviolet sensor can detect ultraviolet data generated by discharge and transmit the data to a single chip microcomputer, the single chip microcomputer can immediately control an ultrasonic sensor and collect ultrasonic data generated during discharge, the single chip microcomputer carries out simple algorithm processing after obtaining the ultraviolet data and the ultrasonic data, then the data are sent to a data analysis server through a wireless network by a transmission antenna, and the discharge conditions of the insulator, the link and the transformer in the switch cabinet are judged by analyzing the data; the system device can monitor the discharge condition of the switch cabinet in all weather; when no discharge data exists for 1 hour for a long time, the system sends the address position information to the data analysis server.
Therefore, the invention has the following beneficial effects:
discharge is detected by using a method of combining sound and light in ultraviolet and ultrasonic, so that the limitation caused by a single detection method and the interference caused by environmental factors are avoided, and the accuracy and the anti-interference capability of the detection device are improved;
the method has the advantages that the discharge state inspection is actively carried out, the possibility of potential accidents is predicted and eliminated, the operation safety of the power distribution network is improved, scientific basis is provided for state maintenance, and the method has wide popularization and application prospects.
Drawings
FIG. 1 is a schematic view of the detecting device of the present invention;
fig. 2 is a flow chart of the detection method of the present invention.
The method comprises the following steps of (1) discharging a detection shell; 2. a power supply device; 3. an ultrasonic sensor; 4. an ultraviolet sensor; 5. a transmission antenna; 6. a switch cabinet transformer; 7. and a single chip microcomputer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the invention includes a handheld switch cabinet partial discharge polling instrument based on a capacitive coupling method, which includes a discharge detection shell 1, a data analysis server and a single chip microcomputer 7, wherein an ultrasonic sensor 3, an ultraviolet sensor 4 and a transmission antenna 5 are arranged outside the discharge detection shell, the ultrasonic sensor and the ultraviolet sensor are respectively connected with the single chip microcomputer installed inside the discharge detection shell through data lines, the single chip microcomputer is connected with the transmission antenna through the data lines, the single chip microcomputer is connected with a power supply device through a power line, and data is transmitted between the transmission antenna and the data analysis server through a GPRS network.
Detecting discharge by using a method combining ultraviolet and ultrasonic waves, wherein the ultraviolet and ultrasonic waves supplement each other to make up respective defects; light and sound are always generated during discharging, and the light and the sound have relatively consistent change rules and characteristics due to synchronous generation of the light and the sound; therefore, acousto-optic information can be acquired through the ultrasonic collector and the ultraviolet collector, and the acquired acousto-optic information is analyzed according to the change rule and the characteristics of the consistency of the acousto-optic information, so that interference is effectively shielded, the detection sensitivity is further enhanced, and the limitation caused by a single detection method and the interference caused by environmental factors are avoided.
The power supply device is a solar battery, the power supply device is a switch cabinet transformer, the solar battery is installed on the outer surface of the discharge detection shell and stably supplies power, faults of the detection device caused by power supply fluctuation are reduced, and the solar energy is used as clean energy to reduce waste of power supply resources of the switch cabinet.
The ultraviolet sensor is connected with the ultraviolet signal acquisition circuit, and is used for acquiring ultraviolet signals emitted along with the discharge of the switch cabinet circuit, filtering and finally sending the acquired signals to the MCU.
The ultrasonic sensor is connected with the ultrasonic signal acquisition circuit, acquires ultrasonic signals emitted along with the discharge of the switch cabinet through the ultrasonic sensor, performs filtering processing and finally sends the acquired signals to the MCU.
The MCU receives analog signals sent by the ultraviolet signal acquisition circuit and the ultrasonic signal acquisition circuit, converts the analog signals into digital signals through the ADC, and sends data to be sent to the GPRS module after processing.
The GPRS module receives the data of the MCU, sends the data into the server through the GPRS network, each acquisition terminal is connected with the server through the GPRS network, sends messages to the server every hour, detects that the connection is normal, and uploads fault data when an emergency fault situation occurs.
The working principle of the detection software is as follows: after detecting the ultraviolet or ultrasonic discharge signal, the client device is switched from the standby state to the condition triggering state; firstly, driving a DTU and a server to establish network connection, sending verification information to the server by a client within an overtime time range, and verifying the legality of data received and sent by the two parties through handshake information; after the client side verifies the data is legal, the server side sends an initial data frame to the client side, the client side receives the initial frame, the handshake process is finished, and the client side uploads the ultrasonic data or the ultraviolet data to the server; the server verifies the received data to be legal (data format verification) and immediately replies a transmission ending frame; transmission of the verification and negative frames: normal interaction is carried out in the data transmission process, and a transmission confirmation frame is returned; in the process of signal receiving and sending, intentionally interrupting or having information errors, returning to transmit a negative frame and requiring retransmission; segment transmission frame: for distinguishing the ultrasonic signal value from the ultraviolet signal value.
The patrol instrument further comprises detection software, the detection software receives collected data from the server side through a preset protocol, performs numerical analysis on the received data, collects device numbers, geographic positions and collection time information in advance, processes and presents the collected data by taking time as a horizontal axis and signal intensity as a vertical axis.
As shown in fig. 2, the present invention further includes a method for polling the partial discharge of the handheld switch cabinet based on the capacitive coupling method, which is characterized by specifically including the following steps:
step S1: installing a switch cabinet discharge fault detection device at a position 0.6-2 meters above a switch cabinet transformer, and connecting a singlechip with a power supply device in a power supply module;
step S2: the switch cabinet discharge fault detection device in the step S1 detects the discharge states of the insulator, the link and the transformer in the switch cabinet to be detected in real time;
and step S3: when one of the insulator, the link or the transformer in the switch cabinet to be detected in the step S2 performs discharge work, the ultraviolet sensor firstly detects ultraviolet data generated by discharge and transmits the data to the singlechip;
and step S4: the single chip microcomputer in the step S3 immediately controls the ultrasonic sensor to collect ultrasonic data generated during discharging after receiving the ultraviolet data, and the ultrasonic data are fed back to the single chip microcomputer;
step S5: the single chip microcomputer MCU processes the data collected by the ultraviolet sensor in the step S3 and the data collected by the ultrasonic sensor in the step S4, and transmits the processed data to the data analysis server through the transmission antenna;
step S6: and (5) analyzing the ultraviolet data and the ultrasonic data by the data analysis server in the step (S5) to judge the discharge levels of the insulator, the line card and the transformer in the switch cabinet.
Wherein the discharge levels are set as follows: when the number of times of ultraviolet pulse is less than 5 and the ultrasonic conversion voltage is 1V, the discharge grade is first grade, which proves that the switch cabinet equipment has slight discharge condition and can be mainly checked in regular inspection; when the ultraviolet pulse frequency is less than 10 times and more than or equal to 5 times and the ultrasonic conversion voltage is 2V, the discharge grade is two-stage, which proves that a large amount of discharge conditions exist in the switch cabinet equipment and the switch cabinet equipment needs to be checked immediately; when the ultraviolet pulse frequency is not less than 10 times and the ultrasonic conversion voltage is 3V, the discharge grade is three, and the fact that the switch cabinet equipment has serious discharge condition is proved to need immediate overhaul and replacement.
The device and the method are used for detecting the discharge conditions of the insulator, the link and the transformer in the switch cabinet; when the system device is used, the system is arranged above a transformer of a switch cabinet at a distance of about 1 m, when an insulator or the transformer of the switch cabinet discharges due to faults, an ultraviolet sensor can detect ultraviolet data generated by discharge and transmit the data to a single chip microcomputer, the single chip microcomputer can immediately control an ultrasonic sensor and collect ultrasonic data generated during discharge, the single chip microcomputer carries out simple algorithm processing after obtaining the ultraviolet data and the ultrasonic data, then the data are sent to a data analysis server through a wireless network by a transmission antenna, and the discharge conditions of the insulator, the link and the transformer in the switch cabinet are judged by analyzing the data; the system device can monitor the discharge condition of the switch cabinet in all weather; when no discharge data exist for 1 hour, the system sends the address position information to the data analysis server.
The device detects partial discharge by using a method combining ultraviolet detection and ultrasonic detection, so that the interference caused by limitation and environmental factors caused by single-method detection can be avoided, light and sound are generated during partial discharge, and the light and the sound have relatively consistent change rules and characteristics due to synchronous generation of the light and the sound; therefore, acousto-optic information can be acquired through the ultrasonic sensor and the ultraviolet sensor, and the acquired acousto-optic information is analyzed according to the consistency of the acousto-optic information; because partial discharge has randomness and the discharge intensity shows the strength and the weakness, the ultraviolet interference which is relatively stable in the nature can be filtered according to the characteristics, the solar blind type ultraviolet sensor is not sensitive to the ultraviolet component in the natural light by using the solar blind type ultraviolet sensor, and the interference of the natural light is filtered by utilizing the characteristics; the discharge information can be detected due to the sensitivity of the ultrasound to discharge, but the sensitivity of partial discharge ultrasound is reduced due to a plurality of external sound wave interference sources with similar frequency bands; the combination of ultraviolet detection and ultrasonic detection can make up respective defects mutually, so that the detection sensitivity is further enhanced; due to the uniqueness of the ultraviolet generation on the power equipment and the line, the detection accuracy is higher.
In addition, the system device adopts a non-electric detection mode, does not directly contact the high-voltage side, has better safety and has good independence; ultraviolet light and ultrasonic wave comprehensive detection are adopted, the two methods complement each other, and the anti-interference capacity is far higher than that of the traditional single detection method; due to the particularity of the monitoring mode of the device, the monitoring cost is greatly reduced, and the volume of the monitoring device is greatly reduced; the system can effectively monitor insulation of the switch cabinet, self aging of the lightning arrester or discharge caused by pollution flashover and wet flashover; discharging caused by aging of an internal winding and oil of a switch cabinet transformer; the discharge is caused by poor local contact among switch cabinet lines, switches, hardware fittings, transformers and insulators due to temperature, humidity, vibration and the like.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.
Claims (8)
1. The utility model provides a hand-held type cubical switchboard office is put and is patrolled and examined appearance based on capacitive coupling method, characterized by, including discharging and detect casing, data analysis server and singlechip, discharge and detect the casing outside and be equipped with ultrasonic sensor, ultraviolet sensor and transmission antenna, ultrasonic sensor and ultraviolet sensor link to each other with installing at the inside singlechip of discharging and detecting the casing through the data line respectively, the singlechip passes through the data line and links to each other with transmission antenna, and the singlechip passes through the power cord and links to each other with power supply unit, through GPRS network transmission data between transmission antenna and the data analysis server.
2. The portable switch cabinet partial discharge polling instrument based on the capacitive coupling method as recited in claim 1, wherein the power supply device is a solar battery, the power supply device is a switch cabinet transformer, and the solar battery is mounted on an outer surface of the discharge detection housing.
3. The handheld switch cabinet partial discharge polling instrument based on the capacitive coupling method as recited in claim 1, wherein the ultraviolet sensor is connected with an ultraviolet signal acquisition circuit, and the ultraviolet sensor acquires an ultraviolet signal emitted along with the discharge of the switch cabinet circuit, and performs filtering processing to finally send the acquired signal to the single chip microcomputer.
4. The handheld switch cabinet partial discharge polling instrument based on the capacitive coupling method as recited in claim 1, wherein the ultrasonic sensor is connected with an ultrasonic signal acquisition circuit, and the ultrasonic sensor acquires ultrasonic signals emitted along with the discharge of the switch cabinet, and performs filtering processing to finally send the acquired signals to the single chip microcomputer.
5. The handheld switch cabinet partial discharge polling instrument based on the capacitive coupling method as recited in claim 1, 3 or 4, wherein the single chip microcomputer receives analog signals sent by the ultraviolet signal acquisition circuit and the ultrasonic signal acquisition circuit, converts the analog signals into digital signals through an ADC (analog to digital converter), and sends data to be sent to the GPRS module after processing.
6. The portable switch cabinet partial discharge polling instrument based on the capacitive coupling method according to claim 5, wherein the GPRS module receives MCU data, sends the data to the server through a GPRS network, each acquisition terminal is connected with the server through the GPRS network, sends a message to the server every hour, detects that the connection is normal, and uploads fault data when an emergency fault condition occurs.
7. The capacitive coupling method-based handheld switch cabinet partial discharge polling instrument according to claim 1, wherein the partial discharge polling instrument further comprises detection software, the detection software receives collected data from a server through a preset protocol, performs numerical analysis on the received data, and processes and presents the collected data by collecting device number, geographic position and collection time information in advance, taking time as a horizontal axis and signal intensity as a vertical axis.
8. A handheld switch cabinet partial discharge inspection method based on a capacitive coupling method is characterized by specifically comprising the following steps of:
step S1: installing a switch cabinet discharge fault detection device at a position 0.5 to 0.8 meter above a switch cabinet transformer, and connecting a singlechip with a power supply device in a power supply module;
step S2: the switch cabinet discharge fault detection device in the step S1 detects the discharge states of the insulator, the link and the transformer in the switch cabinet to be detected in real time;
and step S3: when any one of the insulator, the link or the transformer in the switch cabinet to be detected in the step S2 performs discharge work, the ultraviolet sensor firstly detects ultraviolet data generated by discharge and transmits the data to the single chip microcomputer;
and step S4: the single chip microcomputer in the step S3 immediately controls the ultrasonic sensor to collect ultrasonic data generated during discharging after receiving the ultraviolet data, and the ultrasonic data are fed back to the single chip microcomputer;
step S5: the single chip microcomputer processes the data collected by the ultraviolet sensor in the step S3 and the data collected by the ultrasonic sensor in the step S4, and the processed data are transmitted to a data analysis server through a transmission antenna;
step S6: and (5) analyzing the ultraviolet data and the ultrasonic data by the data analysis server in the step (S5) to judge the discharge levels of the insulator, the line card and the transformer in the switch cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774964.6A CN115389872A (en) | 2022-07-01 | 2022-07-01 | Handheld switch cabinet partial discharge polling instrument based on capacitive coupling method and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210774964.6A CN115389872A (en) | 2022-07-01 | 2022-07-01 | Handheld switch cabinet partial discharge polling instrument based on capacitive coupling method and method thereof |
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| CN115389872A true CN115389872A (en) | 2022-11-25 |
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| CN202210774964.6A Pending CN115389872A (en) | 2022-07-01 | 2022-07-01 | Handheld switch cabinet partial discharge polling instrument based on capacitive coupling method and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116862482A (en) * | 2023-09-04 | 2023-10-10 | 成都昱风能源有限公司 | Power station inspection system and method based on artificial intelligence and big data analysis |
| CN117872024A (en) * | 2024-03-11 | 2024-04-12 | 国网黑龙江省电力有限公司绥化供电公司 | Fault diagnosis method for electric power supply and distribution system |
-
2022
- 2022-07-01 CN CN202210774964.6A patent/CN115389872A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116862482A (en) * | 2023-09-04 | 2023-10-10 | 成都昱风能源有限公司 | Power station inspection system and method based on artificial intelligence and big data analysis |
| CN116862482B (en) * | 2023-09-04 | 2023-11-07 | 成都昱风能源有限公司 | Power station inspection system and method based on artificial intelligence and big data analysis |
| CN117872024A (en) * | 2024-03-11 | 2024-04-12 | 国网黑龙江省电力有限公司绥化供电公司 | Fault diagnosis method for electric power supply and distribution system |
| CN117872024B (en) * | 2024-03-11 | 2024-05-31 | 国网黑龙江省电力有限公司绥化供电公司 | Fault diagnosis method for electric power supply and distribution system |
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