CN109521335A - It is a kind of to take the high-voltage cable insulating state on-line detecting system that powered based on self-induction - Google Patents
It is a kind of to take the high-voltage cable insulating state on-line detecting system that powered based on self-induction Download PDFInfo
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- CN109521335A CN109521335A CN201811366925.2A CN201811366925A CN109521335A CN 109521335 A CN109521335 A CN 109521335A CN 201811366925 A CN201811366925 A CN 201811366925A CN 109521335 A CN109521335 A CN 109521335A
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- 238000009413 insulation Methods 0.000 claims abstract description 32
- 238000004891 communication Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 25
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims description 3
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- 238000009499 grossing Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
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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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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Abstract
The present invention provides a kind of high-voltage cable insulating state on-line detecting system that is taken and can be powered based on self-induction, the state of insulation on-line detecting system includes signal acquisition unit, signal conditioning unit, A/D converting unit, takes energy power supply unit, central control processing unit, communication unit, push-button unit, storage unit, display unit, alarm unit and monitoring center；The state of insulation on-line detecting system takes energy power supply unit to obtain electric energy from the tested cable by described, by carrying out analytical calculation to the signal of acquisition, judges the tested cable work state.The present invention provides a kind of high-voltage cable insulating state on-line detecting system that takes and can power based on self-induction, and electric energy needed for detection system scene is obtained in such a way that live self-induction takes energy improves detection system security reliability.
Description
Technical field
It is the invention belongs to technical field of electric power detection, in particular to a kind of to take the high-tension cable that powered exhausted based on self-induction
Edge state on-line detecting system.
Background technique
With the continuous development of China's economy, demand of the people to electric energy is increasing, and society's entirety electricity consumption is continuous
Rising.The rising of social entirety electricity consumption will lead to the increase of the pressure of national transmission line of electricity.In city, since soil provides
Source is more and more in short supply, overhead transmission line can constitute potential threat and mixed and disorderly overhead transmission line to the appearance of the city to the Electrical Safety of citizen
City's looks will cause influence, so more and more overhead transmission lines are substituted by buried cable.Cable installation is in underground, difference
In overhead transmission line, it is easy to by the corrosion of destruction and environment from external force, and then lead to cable failure, insulation performance drop
It is low.The quality of cable insulation is to influence the key factor of cable safe and reliable operation, needs to pay much attention to.
Power cable insulation state changes the variation that will lead to grounding circulation, is obtained by the situation of change of monitoring grounding circulation
It, being capable of real-time detection failure to the state of insulation of cable, it is ensured that the safe and stable operation of power cable reduces inspection workload,
And it can take timely measure and reduce grounding circulation harm caused by cable.Since cable laying route is longer, scene letter
The equipment power supplies such as number acquisition, processing are unstable, thus it is existing using live self-induction take can by the way of obtain detection system and show
Place needs electric energy, can be improved detection system security reliability.
Summary of the invention
The present invention provides a kind of high-voltage cable insulating state on-line detecting system that takes and can power based on self-induction, using existing
Electric energy needed for field self-induction takes the mode of energy to obtain detection system scene, improves detection system security reliability.
The present invention is specially a kind of high-voltage cable insulating state on-line detecting system that is taken and can be powered based on self-induction, described
State of insulation on-line detecting system include signal acquisition unit, signal conditioning unit, A/D converting unit, take can power supply unit, in
Centre control processing unit, communication unit, push-button unit, storage unit, display unit, alarm unit and monitoring center, the letter
Number acquisition unit and the signal conditioning unit, the A/D converting unit, the central control processing unit, the communication unit
First, described monitoring center is linked in sequence, it is described take can power supply unit respectively with the signal acquisition unit and the signal condition
Unit, the A/D converting unit, the central control processing unit, the communication unit, the push-button unit, the storage
Unit, the display unit, the alarm unit are connected, the central control processing unit also respectively with the key list
First, the described storage unit, the display unit, the alarm unit are connected；The state of insulation on-line detecting system passes through
It is described take can power supply unit from the tested cable obtain electric energy, by carrying out analytical calculation to the signal of acquisition, described in judgement
Tested cable work state.
The signal acquisition unit is socketed on tested cable using Rogowski coil current sensor to cable loop current
Signal is acquired, the low voltage signal of output and the directly proportional relationship of the loop current；Using the first temperature sensing
Device acquires the temperature of the tested cable, using second temperature sensor collection site environment temperature.
The signal conditioning unit includes integrating circuit, amplifying circuit and the first filter circuit, and the integrating circuit uses
Active analog integration method, including operational amplifier, first resistor device, second resistor and capacitor, when the signal of input passes through
When the first resistor device is transmitted to again on the capacitor, it is equal to the capacitor and charges, the voltage on the capacitor
The output voltage of the as described integrating circuit, the output voltage and the directly proportional relationship of the loop current；Described first
Filter circuit can control the frequency of voltage signal within 50Hz working frequency, and filtration frequencies are greater than the signal of 50Hz, subtract
Noise jamming caused by small high-frequency signal.
It is described take can power supply unit include taking energy coil, protection location, rectification circuit, the second filter circuit, battery, lead to
It crosses the taking energy coil and obtains alternating voltage from the tested cable, by the protection location, the rectification circuit, described the
The DC voltage of two filter circuit pressure stabilizing output smoothings carries out power storage or output using the battery；
The taking energy coil uses Open Type Electric Current Mutual Inductor；The protection location uses transient supression diode, prevents
It is described that energy power supply unit is taken to induce very high surge voltage when the circuit-under-test breaks down, cause danger；The storage
Battery used lithium battery.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the storage unit, the display unit
Include electric current early warning value, electric current overload alarm value, current changing rate alarming value, cable temperature alarming value, environment temperature alarming value and
Temperature rise alarming value, the electric current early warning value are less than the electric current overload alarm value；The key-press input unit is in conjunction with the storage
Unit, the display unit can also help patrolman's progress field data to check.
The central control processing unit analyzes and determines the signal of input, by the electric current of real-time measurement and the electricity
Stream early warning value and the electric current overload alarm value compare: if the result of the real-time measurement is less than the electric current early warning value, institute
It is good to state tested cable insulation status；If the result of the real-time measurement is greater than the electric current early warning value, it is super to be less than the electric current
Limiting alarming value, then the tested cable insulation status is deteriorated, state of insulation variation alarm signal is issued by the alarm unit,
And failure report is issued to the monitoring center by the communication unit；If the result of the real-time measurement is greater than the electric current
Overload alarm value, then insulation fault occurs for the tested cable, issues insulation fault alarm signal by the alarm unit, and
Failure report is issued to the monitoring center by the communication unit；
The central control processing unit calculates the curent change trend, and compared with the current changing rate alarming value
Compared with passing through the alarm unit and issue cable insulation status anomalous variation alarm signal if more than the current changing rate alarming value
Number；
The cable temperature of measurement is compared judgement with the cable temperature alarming value by the central control processing unit,
If the cable temperature of measurement is greater than the cable temperature alarming value, cable temperature abnormal alarm is issued by the alarm unit；
The environment temperature of measurement is compared judgement with the environment temperature alarming value, if the environment temperature of measurement is greater than the environment
Temperature alarming value issues environment temperature abnormal alarm by the alarm unit；According to the cable temperature and environment temperature of measurement
Temperature rise is calculated, and is compared judgement with the temperature rise alarming value, it is single by the alarm if more than the temperature rise alarming value
Member issues temperaturing lifting abnormality alarm；
The central control processing unit in conjunction with the storage unit carry out integral point data record, and formed data sheet,
History curve, failure report carry out live access by the key-press input unit and the display unit, pass through the communication
Unit is uploaded to the monitoring center.
Relevant information is transmitted to the monitoring center using the GPRS communication technology by the communication unit, helps monitoring personnel
Long-range monitoring effective in real time is carried out to the tested cable, it can be timely when the tested cable insulation status is abnormal
It takes appropriate measures；The monitoring center uses the gsm wireless communication technology by the data sheet, the history curve, institute
It states failure report and is sent to associated mobile device, the associated mobile device is held by relevant staff.
Detailed description of the invention
Fig. 1 is a kind of structure that the high-voltage cable insulating state on-line detecting system that can be powered is taken based on self-induction of the present invention
Schematic diagram.
Fig. 2 is a kind of integrating circuit knot that the high-voltage cable insulating state on-line detecting system that can be powered is taken based on self-induction
Structure schematic diagram.
Fig. 3 takes taking for the high-voltage cable insulating state on-line detecting system that can be powered that can power singly to be a kind of based on self-induction
Meta structure schematic diagram.
Specific embodiment
It is a kind of to the present invention with reference to the accompanying drawing that the high-voltage cable insulating state on-line checking that can be powered is taken based on self-induction
The specific embodiment of system elaborates.
As shown in Figure 1, state of insulation on-line detecting system includes signal acquisition unit, signal conditioning unit, A/D conversion list
Member takes energy power supply unit, central control processing unit, communication unit, push-button unit, storage unit, display unit, alarm unit
And monitoring center, the signal acquisition unit and the signal conditioning unit, the A/D converting unit, at the central control
Manage unit, the communication unit, the monitoring center be linked in sequence, it is described take can power supply unit respectively with the signal acquisition list
It is first with the signal conditioning unit, the A/D converting unit, the central control processing unit, the communication unit, described press
Key unit, the storage unit, the display unit, the alarm unit are connected, and the central control processing unit also divides
It is not connected with the push-button unit, the storage unit, the display unit, the alarm unit；The state of insulation exists
Line detection system takes energy power supply unit to obtain electric energy from the tested cable by described, by analyzing the signal of acquisition
It calculates, judges the tested cable work state.
The signal acquisition unit is socketed on tested cable using Rogowski coil current sensor to cable loop current
Signal is acquired, the low voltage signal of output and the directly proportional relationship of the loop current；Using the first temperature sensing
Device acquires the temperature of the tested cable, using second temperature sensor collection site environment temperature.
The signal conditioning unit includes integrating circuit, amplifying circuit and the first filter circuit；As shown in Fig. 2, the product
Parallel circuit uses active analog integration method, including operational amplifier 1, first resistor device 2, second resistor 3 and capacitor 4, when
When the signal of input is transmitted on the capacitor 4 again by the first resistor device 2, it is equal to the capacitor 4 and charges, institute
State the output voltage that the voltage on capacitor 4 is the integrating circuit, the output voltage and the loop current directly at
Proportionate relationship；The frequency of voltage signal can be controlled the filtration frequencies within 50Hz working frequency by first filter circuit
Signal greater than 50Hz reduces noise jamming caused by high-frequency signal.
As shown in figure 3, it is described take can power supply unit include taking energy coil, protection location, rectification circuit, the second filtered electrical
Road, battery obtain alternating voltage from the tested cable by the taking energy coil, by the protection location, described whole
The DC voltage of current circuit, the second filter circuit pressure stabilizing output smoothing, using the battery carry out power storage or
Output；
The taking energy coil uses Open Type Electric Current Mutual Inductor；The protection location uses transient supression diode, prevents
It is described that energy power supply unit is taken to induce very high surge voltage when the circuit-under-test breaks down, cause danger；The storage
Battery used lithium battery.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the storage unit, the display unit
Include electric current early warning value, electric current overload alarm value, current changing rate alarming value, cable temperature alarming value, environment temperature alarming value and
Temperature rise alarming value, the electric current early warning value are less than the electric current overload alarm value；The key-press input unit is in conjunction with the storage
Unit, the display unit can also help patrolman's progress field data to check.
The central control processing unit analyzes and determines the signal of input, by the electric current of real-time measurement and the electricity
Stream early warning value and the electric current overload alarm value compare: if the result of the real-time measurement is less than the electric current early warning value, institute
It is good to state tested cable insulation status；If the result of the real-time measurement is greater than the electric current early warning value, it is super to be less than the electric current
Limiting alarming value, then the tested cable insulation status is deteriorated, state of insulation variation alarm signal is issued by the alarm unit,
And failure report is issued to the monitoring center by the communication unit；If the result of the real-time measurement is greater than the electric current
Overload alarm value, then insulation fault occurs for the tested cable, issues insulation fault alarm signal by the alarm unit, and
Failure report is issued to the monitoring center by the communication unit；
The central control processing unit calculates the curent change trend, and compared with the current changing rate alarming value
Compared with passing through the alarm unit and issue cable insulation status anomalous variation alarm signal if more than the current changing rate alarming value
Number；
The cable temperature of measurement is compared judgement with the cable temperature alarming value by the central control processing unit,
If the cable temperature of measurement is greater than the cable temperature alarming value, cable temperature abnormal alarm is issued by the alarm unit；
The environment temperature of measurement is compared judgement with the environment temperature alarming value, if the environment temperature of measurement is greater than the environment
Temperature alarming value issues environment temperature abnormal alarm by the alarm unit；According to the cable temperature and environment temperature of measurement
Temperature rise is calculated, and is compared judgement with the temperature rise alarming value, it is single by the alarm if more than the temperature rise alarming value
Member issues temperaturing lifting abnormality alarm；
The central control processing unit in conjunction with the storage unit carry out integral point data record, and formed data sheet,
History curve, failure report carry out live access by the key-press input unit and the display unit, pass through the communication
Unit is uploaded to the monitoring center.
Relevant information is transmitted to the monitoring center using the GPRS communication technology by the communication unit, helps monitoring personnel
Long-range monitoring effective in real time is carried out to the tested cable, it can be timely when the tested cable insulation status is abnormal
It takes appropriate measures；The monitoring center uses the gsm wireless communication technology by the data sheet, the history curve, institute
It states failure report and is sent to associated mobile device, the associated mobile device is held by relevant staff.
Finally it should be noted that only illustrating technical solution of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair a specific embodiment of the invention
Change or equivalent replacement, but these modifications or change are being applied among pending claims.
Claims (7)
1. a kind of take the high-voltage cable insulating state on-line detecting system that can be powered based on self-induction, which is characterized in that described exhausted
Edge state on-line detecting system includes signal acquisition unit, signal conditioning unit, A/D converting unit, takes energy power supply unit, center
Control processing unit, communication unit, push-button unit, storage unit, display unit, alarm unit and monitoring center, the signal
Acquisition unit and the signal conditioning unit, the A/D converting unit, the central control processing unit, the communication unit,
The monitoring center is linked in sequence, it is described take can power supply unit respectively with the signal acquisition unit and the signal condition list
First, the described A/D converting unit, the central control processing unit, the communication unit, the push-button unit, the storage are single
First, the described display unit, the alarm unit are connected, the central control processing unit also respectively with the push-button unit,
The storage unit, the display unit, the alarm unit are connected；The state of insulation on-line detecting system passes through described
It takes energy power supply unit to obtain electric energy from tested cable, by carrying out analytical calculation to the signal of acquisition, judges the tested cable
Working condition.
A kind of the high-voltage cable insulating state on-line checking system that can be powered is taken based on self-induction 2. according to claim 1
System, which is characterized in that the signal acquisition unit is socketed on tested cable using Rogowski coil current sensor to cable loop
Stream current signal is acquired, the low voltage signal of output and the directly proportional relationship of the loop current；Using the first temperature
Degree sensor acquires the temperature of the tested cable, using second temperature sensor collection site environment temperature.
A kind of the high-voltage cable insulating state on-line checking system that can be powered is taken based on self-induction 3. according to claim 2
System, which is characterized in that the signal conditioning unit includes integrating circuit, amplifying circuit and the first filter circuit, the integral electricity
Road uses active analog integration method, including operational amplifier, first resistor device, second resistor and capacitor, when the letter of input
When number be transmitted on the capacitor again by the first resistor device, it be equal to the capacitor and charge, on the capacitor
Voltage be the integrating circuit output voltage, the output voltage and the directly proportional relationship of the loop current；Institute
Stating the first filter circuit can control the frequency of voltage signal within 50Hz working frequency, and filtration frequencies are greater than the letter of 50Hz
Number, reduce noise jamming caused by high-frequency signal.
A kind of the high-voltage cable insulating state on-line checking system that can be powered is taken based on self-induction 4. according to claim 3
System, which is characterized in that described that energy power supply unit is taken to include taking energy coil, protection location, rectification circuit, the second filter circuit, store
Battery obtains alternating voltage from the tested cable by the taking energy coil, by the protection location, the rectified current
Road, the second filter circuit pressure stabilizing output smoothing DC voltage, carry out power storage or output using the battery；
The taking energy coil uses Open Type Electric Current Mutual Inductor；The protection location uses transient supression diode, prevents from working as institute
When stating circuit-under-test and breaking down, it is described take can power supply unit induce very high surge voltage, cause danger；The battery
Using lithium battery.
A kind of the high-voltage cable insulating state on-line checking system that can be powered is taken based on self-induction 5. according to claim 4
System, which is characterized in that the key-press input unit carries out parameter setting in conjunction with the storage unit, the display unit, described
Parameter includes electric current early warning value, electric current overload alarm value, current changing rate alarming value, cable temperature alarming value, environment temperature report
Alert value and temperature rise alarming value, the electric current early warning value are less than the electric current overload alarm value；The key-press input unit combination institute
State storage unit, the display unit can also help patrolman's progress field data to check.
A kind of the high-voltage cable insulating state on-line checking system that can be powered is taken based on self-induction 6. according to claim 5
System, which is characterized in that the central control processing unit analyzes and determines the signal of input, by the electric current of real-time measurement with
The electric current early warning value and the electric current overload alarm value compare: if the result of the real-time measurement is less than the electric current early warning
Value, then the tested cable insulation status is good；If the result of the real-time measurement is greater than the electric current early warning value, it is less than described
Electric current overload alarm value, then the tested cable insulation status is deteriorated, and issues state of insulation variation report by the alarm unit
Alert signal, and failure report is issued to the monitoring center by the communication unit；If the result of the real-time measurement is greater than
The electric current overload alarm value, then insulation fault occurs for the tested cable, issues insulation fault report by the alarm unit
Alert signal, and failure report is issued to the monitoring center by the communication unit；
The central control processing unit calculates the curent change trend, and compared with the current changing rate alarming value,
If more than the current changing rate alarming value, cable insulation status anomalous variation alarm signal is issued by the alarm unit；
The cable temperature of measurement is compared judgement with the cable temperature alarming value by the central control processing unit, if surveying
The cable temperature of amount is greater than the cable temperature alarming value, issues cable temperature abnormal alarm by the alarm unit；It will survey
The environment temperature of amount is compared judgement with the environment temperature alarming value, if the environment temperature of measurement is greater than the environment temperature
Alarming value issues environment temperature abnormal alarm by the alarm unit；It is calculated according to the cable temperature of measurement and environment temperature
Temperature rise out, and it is compared judgement with the temperature rise alarming value, if more than the temperature rise alarming value, sent out by the alarm unit
Temperaturing lifting abnormality is alarmed out；
The central control processing unit carries out integral point data record in conjunction with the storage unit, and forms data sheet, history
Curve, failure report carry out live access by the key-press input unit and the display unit, pass through the communication unit
It is uploaded to the monitoring center.
A kind of the high-voltage cable insulating state on-line checking system that can be powered is taken based on self-induction 7. according to claim 6
System, which is characterized in that relevant information is transmitted to the monitoring center using the GPRS communication technology by the communication unit, helps to supervise
Control personnel carry out long-range monitoring effective in real time, the energy when the tested cable insulation status is abnormal to the tested cable
It is enough to take appropriate measures in time；The monitoring center is bent by the data sheet, the history using the gsm wireless communication technology
Line, the failure report are sent to associated mobile device, and the associated mobile device is held by relevant staff
Have.
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| CN201811366925.2A CN109521335A (en) | 2018-11-16 | 2018-11-16 | It is a kind of to take the high-voltage cable insulating state on-line detecting system that powered based on self-induction |
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|---|---|---|---|
| CN201811366925.2A CN109521335A (en) | 2018-11-16 | 2018-11-16 | It is a kind of to take the high-voltage cable insulating state on-line detecting system that powered based on self-induction |
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Cited By (17)
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| CN110160481A (en) * | 2019-04-26 | 2019-08-23 | 云南电网有限责任公司电力科学研究院 | A kind of measurement method and device of cable insulation damaged area |
| CN110554290A (en) * | 2019-10-22 | 2019-12-10 | 广东电网有限责任公司 | Cable insulation state monitoring device and monitoring method based on state perception |
| CN110579669A (en) * | 2019-07-11 | 2019-12-17 | 国网江苏省电力有限公司徐州供电分公司 | small current ground fault detection system and method based on zero sequence component analysis |
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| CN110631738A (en) * | 2019-10-18 | 2019-12-31 | 国网江苏省电力有限公司盐城供电分公司 | Power transformer temperature detection system based on inductive power supply and detection method thereof |
| CN110702973A (en) * | 2019-10-14 | 2020-01-17 | 四川国信慧通电气技术有限公司 | Online measuring device for induced voltage of cable sheath |
| CN110879338A (en) * | 2019-12-04 | 2020-03-13 | 国网江苏省电力有限公司南通供电分公司 | High-voltage power equipment insulation detection system based on inductive power supply and detection method thereof |
| CN110879339A (en) * | 2019-12-04 | 2020-03-13 | 国网江苏省电力有限公司南通供电分公司 | Insulation detection system and method for high-voltage power equipment |
| CN110908307A (en) * | 2019-11-01 | 2020-03-24 | 国网江苏省电力有限公司盐城供电分公司 | Power equipment temperature monitoring system and monitoring method thereof |
| CN111103502A (en) * | 2019-11-07 | 2020-05-05 | 国网江苏省电力有限公司盐城供电分公司 | Power transmission cable detection system based on multiple signal acquisition |
| CN111157859A (en) * | 2020-01-14 | 2020-05-15 | 杭州巨骐信息科技股份有限公司 | Small current electricity taking composite sensor |
| CN112394297A (en) * | 2020-11-10 | 2021-02-23 | 国网江苏省电力有限公司盐城供电分公司 | Electrical cabinet insulation detection device and method based on bus bar induction power supply |
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| CN111157859A (en) * | 2020-01-14 | 2020-05-15 | 杭州巨骐信息科技股份有限公司 | Small current electricity taking composite sensor |
| CN112394297A (en) * | 2020-11-10 | 2021-02-23 | 国网江苏省电力有限公司盐城供电分公司 | Electrical cabinet insulation detection device and method based on bus bar induction power supply |
| CN112485600A (en) * | 2020-12-09 | 2021-03-12 | 国网四川省电力公司电力科学研究院 | Distribution line fault path detection primary and secondary fusion sensor and sensor network |
| CN114046907A (en) * | 2022-01-12 | 2022-02-15 | 南京谷贝电气科技有限公司 | Electric field energy taking temperature sensor calibration device and method |
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