CN103399192A - Split type zero flux small electric current sensor for on-line monitoring and charged test of capacitive equipment - Google Patents
Split type zero flux small electric current sensor for on-line monitoring and charged test of capacitive equipment Download PDFInfo
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- CN103399192A CN103399192A CN2013103345381A CN201310334538A CN103399192A CN 103399192 A CN103399192 A CN 103399192A CN 2013103345381 A CN2013103345381 A CN 2013103345381A CN 201310334538 A CN201310334538 A CN 201310334538A CN 103399192 A CN103399192 A CN 103399192A
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Abstract
The invention discloses a split type zero flux small electric current sensor for on-line monitoring and charged test of capacitive equipment, wherein the zero flux current sensor is designed in a split manner, fragile complementation and output circuit modules are separated from other parts such as a magnetic core, and the fragile complementation and output circuit modules are connected with the other parts through a connecting wire of a terminal strip, so that when the fragile complementation and output circuit modules are damaged, the end screen wire of the equipment is not detached, and breakpoints in the end screen wire are not increased to change the circuit part of the sensor. The sensor disclosed by the invention is simple in structure and easy to implement in the field.
Description
Technical field
The present invention relates to electrical equipment online monitoring and live testing technical field, relate in particular to a kind of capacitive apparatus on-line monitoring and live testing with split type zero magnetic flux small electric current sensor.
Background technology
To super (spy) high pressure, large capacity, large System Development, the safe operation of electric system is increasing on the impact of national economy and people's lives along with electric system.And electrical equipment is the primary element that forms electric system, is the basis that guarantees power supply reliability, and the safe operation of electrical equipment is the prerequisite of power system security, stable, economical operation.Along with developing rapidly of the technology such as sensor, optical fiber, computing machine, under running status, the state of insulation of high voltage electric equipment being carried out real-time on-line monitoring or live testing can the operating abundant information of equipment, understands the real-time state of insulation of high voltage electric equipment.The insulation of electrical installation state is carried out the change information that on-line monitoring or live testing can equipment state of insulation parameters (leakage current, dielectric loss angle tan δ, current in resistance property etc.).
The technical way that present capacitive apparatus insulated on-line monitoring and live testing are taked is to connect wires and transform by the capacitive apparatus end shield, and zero magnetic flux small electric current sensor is installed, extraction equipment end shield electric current, and then analyze the apparatus insulated state that draws.On-line monitoring and live testing all need to be opened equipment end shield ground wire after equipment has a power failure, then the on-line monitoring sampling detector is installed, and then equipment end shield ground wire is restored, and carry out on-line monitoring when equipment normally moves.The safety of using in order to ensure scene simultaneously, prevent that accident (the measurement lead-in wire as testing instrument for electrified disconnects) from causing equipment end shield open circuit, increases the short circuit sheet and the discharge tube that are in parallel with zero magnetic flux current sensor end shield lead terminal.When on-line monitoring and live testing, the short circuit sheet is open mode, and equipment end shield ground current is introduced in testing instrument for electrified, and discharge tube shields in measuring process.The configuration of short circuit sheet and discharge tube can realize the replacing to current sensor, but due to the breakpoint of the end shield line of its increase, so the onsite user does not recommend this kind mode to change sensor.
General zero magnetic flux current sensor is by magnetic core and be wound on secondary coil and magnetic test coil on magnetic core, and compensation and output circuit module etc. are composition partly.Find by rig-site utilization, being arranged on on-the-spot zero magnetic flux current sensor has damaged condition to occur, after zero magnetic flux current sensor damages, due to equipment power failure difficulty, be difficult to implement and it is more changed jobs, and then cause apparatus insulated on-line monitoring and live testing work to be affected.
In zero magnetic flux current sensor, compensating circuit module and output circuit module are owing to containing electron device, the probability of its damage is more much larger than magnetic core part, therefore the present invention is based on this, zero magnetic flux current sensor has been carried out split-type design, compensating circuit and output circuit part are separated with other parts such as magnetic cores, be connected by wire between two parts, thereby when circuit part damages, can take equipment end shield line apart, also need not increase the breakpoint in the end shield line and the circuit part of sensor is changed.
Summary of the invention
In order to meet when zero magnetic flux current sensor damages, need not take equipment end shield line apart, also need not increase the breakpoint in the end shield line and the rapid wear circuit part of sensor is changed, the invention provides a kind of capacitive apparatus on-line monitoring and live testing with split type zero magnetic flux small electric current sensor.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
1. capacitive apparatus on-line monitoring and live testing are with split type zero magnetic flux small electric current sensor, zero magnetic flux current sensor has been carried out split-type design, flimsy compensation output circuit module and the other parts such as magnetic core are separated, be connected by terminal row wiring between two parts, thereby when compensation and output circuit module damage, can take equipment end shield line apart, also need not increase the breakpoint in the end shield line and the circuit part of sensor is changed.
2. capacitive apparatus on-line monitoring and live testing are comprised of shielding aluminium box, magnetic core, compensation and output circuit module, the first connecting terminal block, the second connecting terminal block, end shield core line, end shield line screen layer, secondary coil and magnetic test coil with split type zero magnetic flux small electric current sensor.Be provided with magnetic core, compensation and output circuit module, the first connecting terminal block, the second connecting terminal block, end shield core line, end shield line screen layer, secondary coil and magnetic test coil in shielding aluminium box, end shield line screen layer is wrapped in outside end shield core line.
The first connecting terminal block, the second connecting terminal block are equipped with respectively in described compensation and output circuit module both sides, the first connecting terminal block has four Wiring ports, the second connecting terminal block also has four Wiring ports, first Wiring port is signal output, second Wiring port is power supply ground interface, the 3rd Wiring port is-the 12V interface that the 4th Wiring port is+the 12V interface.
Described secondary coil and magnetic test coil are wound on magnetic core, both around on the contrary; Secondary coil is connected with the output circuit module with compensation with second Wiring port by first Wiring port of the first connecting terminal block; Magnetic test coil is connected with the output circuit module with compensation with the 4th Wiring port by the 3rd Wiring port of the first connecting terminal block.
Described end shield core line two ends pass shielding aluminium box; Described end shield line screen layer two ends pass shielding aluminium box, wherein an end ground connection.
The circuit of described compensation and output circuit module is by resistance R
1, R
2, R
3, R
4, R
5, R
6And R
7, capacitor C
1, C
2, C
3Form with amplifier OPA1, OPA2.
Capacitor C
3, resistance R
7Be connected with first Wiring port signal output of the second connecting terminal block after the end parallel connection of an end after parallel connection and amplifier OPA2.C
3Electric capacity, R
7The other end after the resistance parallel connection is with after the negative pole of amplifier OPA2 is in parallel and resistance R
5An end connect, resistance R
5The other end be connected with first Wiring port of the first connecting terminal block.The positive pole of amplifier OPA2 and resistance R
6An end connect, R
6Other end ground connection.
Capacitor C
1, resistance R
3An end after parallel connection is with after the end of amplifier OPA1 is in parallel and capacitor C
2An end connect and access second Wiring port of the first connecting terminal block, capacitor C
2The other end and resistance R
4One end connects, resistance R
4Other end ground connection.
Capacitor C
1, resistance R
3The other end after parallel connection is with after the negative pole of amplifier OPA1 is in parallel and resistance R
1An end connect, resistance R
1The 4th Wiring port and ground connection of other end access the first connecting terminal block.
The positive pole of amplifier OPA1 and resistance R
2An end connect, resistance R
2The 3rd Wiring port of other end access the first connecting terminal block.
3. above-mentioned capacitive apparatus on-line monitoring and live testing with installation and the replacing of split type zero magnetic flux small electric current sensor, specifically adopt following steps to realize:
A. the equipment outage is transformed end shield core line and end shield line screen layer, with end shield core line and end shield line screen layer that appropriate length and wire diameter meet the demands, replaces original end shield ground wire.One end of end shield core line and end shield line screen layer is fixed on the end shield point of monitored equipment.
B. the heart yearn of the other end of end shield core line and end shield line screen layer and screen layer are separated, cause by water joint in the shielding aluminium box of split type zero magnetic flux small electric current sensor.
C. in shielding aluminium box, end shield line screen layer directly is connected with shielding aluminium box, and at first end shield core line passes the magnetic core of split type zero magnetic flux small electric current sensor, then by water joint, draws shielding aluminium box, is connected to the monitored equipment earth point.
D. sensor power supply line and signal wire adopt the four-core shielding line, introduce the shielding aluminum hull by water joint, be connected with first Wiring port signal output with second Wiring port power supply ground interface of the second connecting terminal block of split type zero magnetic flux small electric current sensor with live testing with the capacitive apparatus on-line monitoring respectively.
While e. needing to change capacitive apparatus on-line monitoring and live testing with the compensation of split type zero magnetic flux small electric current sensor and output circuit module, after opening the shielding aluminum hull, to compensate and the output circuit module on all connecting terminal blocks take off, take out compensation and the output circuit module damaged, then new module is replaced with, will compensate and the output circuit module on all connecting terminal blocks load onto and get final product.
The present invention has following beneficial effect:
Zero magnetic flux current sensor has been carried out split-type design, flimsy compensation output circuit module and the other parts such as magnetic core are separated, be connected by wire between two parts, thereby when compensation and output circuit module damage, can take equipment end shield line apart, also need not increase the breakpoint in the end shield line and the circuit part of sensor is changed.
Description of drawings
Fig. 1 is capacitive apparatus on-line monitoring of the present invention and live testing with split type zero magnetic flux small electric current sensor structural representation.
In figure, shielding aluminium box 1, magnetic core 2,3-compensation and output circuit module, the first connecting terminal block 4, the second connecting terminal blocks 5, end shield core line 6, end shield line screen layer 7, secondary coil 8, magnetic test coil 9.
Fig. 2 is compensation of the present invention and output circuit modular structure schematic diagram.
In figure, resistance R
1, R
2, R
3, R
4, R
5, R
6, R
7, capacitor C
1, C
2, C
3, amplifier OPA1, amplifier OPA2.
Embodiment
The invention will be further described with concrete enforcement below in conjunction with accompanying drawing.
capacitive apparatus on-line monitoring and live testing are with split type zero magnetic flux small electric current sensor structure as depicted in figs. 1 and 2, sensor is by shielding aluminium box 1, magnetic core 2, compensation and output circuit module 3, the first connecting terminal block 4, the second connecting terminal block 5, end shield core line 6, end shield line screen layer 7, secondary coil 8 and magnetic test coil 9 form, be provided with magnetic core 2 in shielding aluminium box 1, compensation and output circuit module 3, the first connecting terminal block 4, the second connecting terminal block 5, end shield core line 6, end shield line screen layer 7, secondary coil 8 and magnetic test coil 9, end shield line screen layer 7 is wrapped in outside end shield core line 6,
The first connecting terminal block 4, the second connecting terminal block 5 are equipped with respectively in described compensation and output circuit module 3 both sides, the first connecting terminal block 4 has four Wiring ports, the second connecting terminal block 5 also has four Wiring ports, first Wiring port is signal output, second Wiring port is power supply ground interface, the 3rd Wiring port is-the 12V interface that the 4th Wiring port is+the 12V interface;
Described secondary coil 8 and magnetic test coil 9 are wound on magnetic core 2, both around on the contrary; Secondary coil 8 is connected with output circuit module 3 with compensation with second Wiring port by first Wiring port of the first connecting terminal block 4; Magnetic test coil 9 is connected with output circuit module 3 with compensation with the 4th Wiring port by the 3rd Wiring port of the first connecting terminal block 4;
Described end shield core line 6 two ends pass shielding aluminium box 1; Described end shield line screen layer 7 two ends pass shielding aluminium box 1, wherein an end ground connection;
The circuit of described compensation and output circuit module 3 as shown in Figure 2, by resistance R
1, R
2, R
3, R
4, R
5, R
6And R
7, capacitor C
1, C
2, C
3Form with amplifier OPA1, OPA2;
Capacitor C
3, resistance R
7Be connected with first Wiring port signal output of the second connecting terminal block 5 after the end parallel connection of an end after parallel connection and amplifier OPA2; C
3Electric capacity, R
7The other end after the resistance parallel connection is with after the negative pole of amplifier OPA2 is in parallel and resistance R
5An end connect, resistance R
5The other end be connected with first Wiring port of the first connecting terminal block 4; The positive pole of amplifier OPA2 and resistance R
6An end connect, R
6Other end ground connection;
Capacitor C
1, resistance R
3An end after parallel connection is with after the end of amplifier OPA1 is in parallel and capacitor C
2An end connect and access second Wiring port of the first connecting terminal block 4, capacitor C
2The other end and resistance R
4One end connects, resistance R
4Other end ground connection;
Capacitor C
1, resistance R
3The other end after parallel connection is with after the negative pole of amplifier OPA1 is in parallel and resistance R
1An end connect, resistance R
1The 4th Wiring port and ground connection of other end access the first connecting terminal block 4;
The positive pole of amplifier OPA1 and resistance R
2An end connect, resistance R
2The 3rd Wiring port of other end access the first connecting terminal block 4.
The present invention specifically implements:
Capacitive apparatus on-line monitoring and live testing with installation and the replacing of split type zero magnetic flux small electric current sensor, specifically adopt following steps to realize:
1. the equipment outage is transformed end shield core line 6 and end shield line screen layer 7, with end shield core line 6 and end shield line screen layer 7 that appropriate length and wire diameter meet the demands, replaces original end shield ground wire.One end of end shield core line 6 and end shield line screen layer 7 is fixed on the end shield point of monitored equipment;
2. the heart yearn of the other end of end shield core line 6 and end shield line screen layer 7 and screen layer are separated, cause by water joint in the shielding aluminium box 1 of split type zero magnetic flux small electric current sensor;
3. in shielding aluminium box, end shield line screen layer 7 directly is connected with shielding aluminium box 1, and at first end shield core line 6 passes the magnetic core 2 of split type zero magnetic flux small electric current sensor, then by water joint, draws shielding aluminium box 1, is connected to the monitored equipment earth point;
4. sensor power supply line and signal wire adopt the four-core shielding line, introduce the shielding aluminum hull by water joint, be connected with first Wiring port signal output with second Wiring port power supply ground interface of the second connecting terminal block 5 of split type zero magnetic flux small electric current sensor with live testing with the capacitive apparatus on-line monitoring respectively;
5. while need changing capacitive apparatus on-line monitoring and live testing with the compensation of split type zero magnetic flux small electric current sensor and output circuit module 3, after opening shielding aluminum hull 1, to compensate and output circuit module 3 on all connecting terminal blocks take off, take out compensation and the output circuit module damaged, then new module is replaced with, will compensate and output circuit module 3 on all connecting terminal blocks load onto and get final product.
Claims (3)
1. capacitive apparatus on-line monitoring and live testing are with split type zero magnetic flux small electric current sensor, it is characterized in that: zero magnetic flux current sensor has been carried out split-type design, flimsy compensation output circuit module and the other parts such as magnetic core are separated, be connected by terminal row wiring between two parts, thereby when compensation and output circuit module damage, can take equipment end shield line apart, also need not increase the breakpoint in the end shield line and the circuit part of sensor is changed.
2. capacitive apparatus on-line monitoring and live testing are with split type zero magnetic flux small electric current sensor, it is characterized in that, it is by shielding aluminium box (1), magnetic core (2), compensation and output circuit module (3), the first connecting terminal block (4), the second connecting terminal block (5), end shield core line (6), end shield line screen layer (7), secondary coil (8) and magnetic test coil (9) form, be provided with magnetic core (2) in shielding aluminium box (1), compensation and output circuit module (3), the first connecting terminal block (4), the second connecting terminal block (5), end shield core line (6), end shield line screen layer (7), secondary coil (8) and magnetic test coil (9), end shield line screen layer (7) is wrapped in outside end shield core line (6),
The first connecting terminal block (4), the second connecting terminal block (5) are equipped with respectively in described compensation and output circuit module (3) both sides, the first connecting terminal block (4) has four Wiring ports, the second connecting terminal block (5) also has four Wiring ports, first Wiring port is signal output, second Wiring port is power supply ground interface, the 3rd Wiring port is-the 12V interface that the 4th Wiring port is+the 12V interface;
Described secondary coil 8) and magnetic test coil (9) be wound on magnetic core (2), both around on the contrary; Secondary coil (8) is connected with output circuit module (3) with compensation with second Wiring port by first Wiring port of the first connecting terminal block (4); Magnetic test coil (9) is connected with output circuit module (3) with compensation with the 4th Wiring port by the 3rd Wiring port of the first connecting terminal block (4);
Described end shield core line (6) two ends pass shielding aluminium box (1); Described end shield line screen layer (7) two ends pass shielding aluminium box (1), wherein an end ground connection;
The circuit of described compensation and output circuit module (3) is by resistance R
1, R
2, R
3, R
4, R
5, R
6And R
7, capacitor C
1, C
2, C
3Form with amplifier OPA1, OPA2;
Capacitor C
3, resistance R
7Be connected with first Wiring port signal output of the second connecting terminal block (5) after the end parallel connection of an end after parallel connection and amplifier OPA2; C
3Electric capacity, R
7The other end after the resistance parallel connection is with after the negative pole of amplifier OPA2 is in parallel and resistance R
5An end connect, resistance R
5The other end be connected with first Wiring port of the first connecting terminal block (4); The positive pole of amplifier OPA2 and resistance R
6An end connect, R
6Other end ground connection;
Capacitor C
1, resistance R
3An end after parallel connection is with after the end of amplifier OPA1 is in parallel and capacitor C
2An end connect and access second Wiring port of the first connecting terminal block (4), capacitor C
2The other end and resistance R
4One end connects, resistance R
4Other end ground connection;
Capacitor C
1, resistance R
3The other end after parallel connection is with after the negative pole of amplifier OPA1 is in parallel and resistance R
1An end connect, resistance R
1The 4th Wiring port and ground connection of other end access the first connecting terminal block (4);
The positive pole of amplifier OPA1 and resistance R
2An end connect, resistance R
2The 3rd Wiring port of other end access the first connecting terminal block (4).
3. capacitive apparatus on-line monitoring as claimed in claim 1 and live testing, with installation and the replacing of split type zero magnetic flux small electric current sensor, is characterized in that, specifically adopt following steps to realize:
A. the equipment outage is transformed end shield core line (6) and end shield line screen layer (7), with end shield core line (6) and end shield line screen layer (7) that appropriate length and wire diameter meet the demands, replaces original end shield ground wire.One end of end shield core line (6) and end shield line screen layer (7) is fixed on the end shield point of monitored equipment;
B. the heart yearn of the other end of end shield core line (6) and end shield line screen layer (7) and screen layer are separated, cause by water joint in the shielding aluminium box (1) of split type zero magnetic flux small electric current sensor;
C. in shielding aluminium box, end shield line screen layer (7) directly is connected with shielding aluminium box (1), end shield core line (6) at first passes the magnetic core (2) of split type zero magnetic flux small electric current sensor, then by water joint, draws shielding aluminium box (1), is connected to the monitored equipment earth point;
D. sensor power supply line and signal wire adopt the four-core shielding line, introduce the shielding aluminum hull by water joint, be connected with first Wiring port signal output with second Wiring port power supply ground interface of second connecting terminal block (5) of split type zero magnetic flux small electric current sensor with live testing with the capacitive apparatus on-line monitoring respectively;
While e. needing to change capacitive apparatus on-line monitoring and live testing with the compensation of split type zero magnetic flux small electric current sensor and output circuit module (3), after opening shielding aluminum hull (1), to compensate with upper all connecting terminal blocks of output circuit module (3) and take off, take out compensation and the output circuit module damaged, then new module is replaced with, will compensate with upper all connecting terminal blocks of output circuit module (3) and load onto and get final product.
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| CN2013103345381A CN103399192A (en) | 2013-08-02 | 2013-08-02 | Split type zero flux small electric current sensor for on-line monitoring and charged test of capacitive equipment |
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|---|---|---|---|
| CN2013103345381A CN103399192A (en) | 2013-08-02 | 2013-08-02 | Split type zero flux small electric current sensor for on-line monitoring and charged test of capacitive equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698033A (en) * | 2013-12-17 | 2014-04-02 | 广西电网公司电力科学研究院 | Transformer winding hot-spot temperature forecasting evaluation system with self-adaption function |
| CN105203881A (en) * | 2015-09-18 | 2015-12-30 | 国家电网公司 | Terminal box for high-voltage equipment insulation and electrification testing and testing method |
| CN107768904A (en) * | 2017-10-26 | 2018-03-06 | 国网宁夏电力公司检修公司 | Plug-in Rogowski coil device |
| CN112284321A (en) * | 2020-09-21 | 2021-01-29 | 国网河北省电力有限公司临漳县供电分公司 | Live-line measurement device and method for live-line measurement of wire diameter |
| CN114137285A (en) * | 2021-11-24 | 2022-03-04 | 广东电网有限责任公司 | Charged display |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103698033A (en) * | 2013-12-17 | 2014-04-02 | 广西电网公司电力科学研究院 | Transformer winding hot-spot temperature forecasting evaluation system with self-adaption function |
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| CN107768904A (en) * | 2017-10-26 | 2018-03-06 | 国网宁夏电力公司检修公司 | Plug-in Rogowski coil device |
| CN112284321A (en) * | 2020-09-21 | 2021-01-29 | 国网河北省电力有限公司临漳县供电分公司 | Live-line measurement device and method for live-line measurement of wire diameter |
| CN112284321B (en) * | 2020-09-21 | 2022-08-02 | 国网河北省电力有限公司临漳县供电分公司 | Live-line measurement device and method for measuring wire diameter of wire |
| CN114137285A (en) * | 2021-11-24 | 2022-03-04 | 广东电网有限责任公司 | Charged display |
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Application publication date: 20131120 |