CN103675613A - Transformer station DC system movable type insulation supervision instrument - Google Patents
Transformer station DC system movable type insulation supervision instrument Download PDFInfo
- Publication number
- CN103675613A CN103675613A CN201310534570.4A CN201310534570A CN103675613A CN 103675613 A CN103675613 A CN 103675613A CN 201310534570 A CN201310534570 A CN 201310534570A CN 103675613 A CN103675613 A CN 103675613A
- Authority
- CN
- China
- Prior art keywords
- circuit
- bridge
- transformer station
- microprocessor
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a transformer station DC system movable type insulation supervision instrument. The instrument comprises a supervision host, a data acquisition device and a movable type sensor, wherein the supervision host comprises a bridge circuit, a protection circuit, a low-frequency signal generator, an analog-to-digital conversion circuit, a microprocessor, an alarm device, a display device, a communication module and a photoelectric isolation device, and the data acquisition device comprises more than one set of a simulation selection switch, an amplifier, a band pass filter, a phase comparator, a filter, an analog-to-digital conversion circuit and a microprocessor which are connected. The transformer station DC system movable type insulation supervision instrument has a movable type characteristic, can simultaneously detect multiple loops, has high automation program degree adaptability, can perform supervision on a bridge of an original DC system of a transformer station, but can detect impedance of the original bridge, and can set an original circuit through setting a menu.
Description
Technical field
The present invention relates to a kind of insulating monitoring instrument, particularly a kind of transformer station direct current system mobile insulation monitor.
Background technology
Domestic direct supply insulation monitoring and warning device is all fixed at present, can only be contained in the work of a certain transformer station, if insulating monitor generation equipment failure, getting rid of between monitoring device age at failure, now transforming plant DC power supply loses insulating monitor work, and to DC power source safety, operation brings hidden danger.For guaranteeing safe operation of power system, must change in time a set of general D.C. isolation monitoring equipment, carry out straight-flow system insulating monitoring.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, and a kind of applicable various straight-flow systems are provided, are convenient to when emergent come into operation, thereby can in time, effectively guarantee the transformer station direct current system mobile insulation monitor of the normal operation of straight-flow system.
A kind of transformer station direct current system mobile insulation monitor, include supervision main frame, data collector and mobile sensor, described supervision main frame includes bridge diagram, holding circuit, Signal Generator of Ultra-low Frequency, analog to digital conversion circuit, microprocessor, warning device, display device, communication module, optical isolation, described holding circuit realizes bus monitoring, at bridge diagram, detect after busbar grounding, holding circuit controls Signal Generator of Ultra-low Frequency work and synchronous output synchronizing signal arrives data collector, described bridge diagram includes balance bridge testing circuit and uneven bridge testing circuit, holding circuit is controlled Signal Generator of Ultra-low Frequency by triggering and is connected with microprocessor, bridge diagram is connected with microprocessor by analog to digital conversion, microprocessor is also connected with communication module, optical isolation, warning device and display device, and optical isolation is by serial ports connection data harvester,
Described data collector includes the more than one group analog selection switch being connected, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit and microprocessor, described analog selection switch obtains sensor current signal by mobile sensor, described supervision host computer control Signal Generator of Ultra-low Frequency work is exported synchronizing signal to the phase comparator of data collector simultaneously, supervising host supervision after busbar grounding, main frame injects ultra-low frequency signal source to straight-flow system, the induction current that reception mobile sensor is sent in data acquisition here is through analog selection switch, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit is sent into microprocessor and is processed, by the serial line interface of microprocessor, send into supervision main frame again,
Described mobile sensor is stuck on each branch road loop of bus, if having resistance eutral grounding on branch road loop, the sensor being contained on this branch road produces induction current, and the resistance of faradic size and grounding resistance is inversely proportional to.
Transformer station direct current system mobile insulation monitor of the present invention, can realize straight-flow system line line ground connection, grounding is searched, overvoltage/undervoltage detects, and provide warning message output and display device to show according to testing result, also can by communication interface circuit, send data to host computer because the present invention has been equipped with two electric bridges simultaneously, therefore can use in different transformer station direct current systems, owing to having adopted phase comparator in data collector, it can eliminate the impact on measurement of Grounding Resistance degree of accuracy of ground capacitance on branch road loop, also can overcome asynchronous AC signal on bus disturbs simultaneously.Owing to having adopted mobile sensor, therefore a plurality of transformer stations, as long as adopt a set of mobile insulation detector equipment, can save large number quipments expense like this.
Being set as of null-type bridge circuit and unbalance bridge circuit in described bridge diagram: set according to the principle of scene original straight-flow system power supply monitoring instrument, when the circuit of original transformer station is balancing circuitry, if electric bridge can not exit after equipment produces fault, when dropping into again transformer station direct current system mobile insulation monitor, while first adopting unbalanced circuit monitoring, the modified value of setting device parameter is set as 0 and drops into and measure again, measure the resistance value on balance bridge on original equipment, after the resistance value of measuring is done to modified value and is revised, select again balancing circuitry to measure, monitor is when asking for stake resistance, CPU can change the coefficient in former computing formula according to the modified value of setting, can eliminate former balancing circuitry impact, make the monitoring of equipment that drops into again accurate, can not produce wrong report, when the circuit of original transformer station is unbalanced circuit, if former straight-flow system power supply monitoring equipment produces after fault, for prevent that the device of two cover unbalanced circuit work from dropping into simultaneously, the error detection causing or wrong report, need first by after failed equipment power-off, in like manner adopt above-mentioned unbalanced bridge method to measure, carry out data correction, and then drop into unbalanced circuit operation.Due to unbalanced circuit monitoring, computing formula more complicated, when to larger stake resistance, computational accuracy is poor, therefore takes to test calibration steps, deposits the data list of experiment gained in register, by former setting modified value, carry out computation of table lookup processing again, eliminate former balancing circuitry to the Accuracy of measuring, make the monitoring of equipment that drops into again accurate, can not produce wrong report.
Described mobile sensor is caliper brake movable sensor, and described clamp are that ferromagnetic material is made, and adopts electromagnetic screen.
Described clamp are the caliper brake detection probe that disposes different size and shape.
Amplifier in described data collector is for adopting operational amplifier and the data amplifier of low noise, low drift, low-power consumption, high-isolation.
The workflow of the microprocessor of described supervision main frame is: mobile insulation monitor is being carried out after correct parameter arranges, supervisory device normally puts into operation, carries out in real time busbar voltage and bus insulation against ground and detects.When the working voltage of DC bus collection and device arranges superpressure or under-voltage definite value compares, exceed while arranging after definite value, sending " bus superpressure " or " bus is under-voltage " reports to the police, light and drive host apparatus panel " overpressure alarm " or " undervoltage warning " pilot lamp, connect " ultra under-pressure warning " hard contact simultaneously.Then according to the electric bridge of setting, detect bus insulation against ground situation, when detecting bus resistance to earth value, be less than when insulation resistance definite value is set, send " insulation alarm ", light and drive host apparatus panel " insulation alarm " pilot lamp, connect " insulation alarm " hard contact simultaneously.After detecting busbar grounding, host CPU is controlled Signal Generator of Ultra-low Frequency and is injected ultralow frequency AC signal to bus, sends synchronizing signal to the phase correlation device of data collector simultaneously.The induction current that reception mobile sensor is sent in data acquisition here is through analog selection switch, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit is sent into microprocessor and is processed, by the serial line interface of microprocessor, send into supervision main frame again, supervision main frame is patrolled and examined branch road sample information (comprising amplitude and phase place) by road, the grounding threshold value of setting with device compares, thereby judge ground connection branch road and grounding resistance, after branch road generation ground connection having been detected, send " branch road warning ", light and drive host apparatus panel " branch road warning " pilot lamp, connect " branch road warning " hard contact simultaneously, if all branch roads being are all are being patrolled and examined one time, do not find ground connection branch road, return to starting point and carry out bus detection, repeat above-mentioned work.After the said equipment is reported to the police, CPU controls communication module simultaneously, by the communication modes such as 485,232, warning and action message is uploaded to remote monitoring system.
In sum, the present invention's following advantage compared to existing technology:
Transformer station direct current system mobile insulation monitor of the present invention, there is portable feature, can detect a plurality of loops again simultaneously, and automated procedures degree strong adaptability, the electric bridge of the original straight-flow system of You Neng transformer station is supervised inspection, but detects the impedance of original electric bridge, by setting menu, original circuit is set, the balance bridge that detects original system during the normal operation of shielding, use equipment recovers normal runnable interface, stand-by equipment that can be using the equipment of this cover as a plurality of transformer stations.The application of transformer station direct current system mobile insulation monitor of the present invention has improved the safety and reliability of operation of power networks, economic and social profit is obvious: a plurality of transformer stations, as long as adopt a set of mobile insulation detector equipment, can save large number quipments expense like this; Because automation degree of equipment is high, conveniently moving, has improved the efficiency that straight-flow system insulation fault is got rid of by transformer station greatly, has greatly saved the loss of supply causing because getting rid of insulation fault.Also during effectively avoiding supervisory device to damage, the operations staff of transformer station's (particularly unattended station) must arrive at a station and regularly patrol survey simultaneously, has saved the input of manpower.
Accompanying drawing explanation
Fig. 1 is that the circuit of transformer station direct current system mobile insulation monitor of the present invention forms.
Fig. 2 is the workflow diagram of supervision host microprocessors.
Embodiment
Below in conjunction with embodiment, the present invention is described in more detail.
Embodiment 1
A kind of transformer station direct current system mobile insulation monitor, include supervision main frame, data collector and mobile sensor, described supervision main frame includes bridge diagram, holding circuit, Signal Generator of Ultra-low Frequency, analog to digital conversion circuit, microprocessor, warning device, display device, communication module, optical isolation, described holding circuit realizes bus monitoring, at bridge diagram, detect after busbar grounding, holding circuit controls Signal Generator of Ultra-low Frequency work and synchronous output synchronizing signal arrives data collector, described bridge diagram includes balance bridge testing circuit and uneven bridge testing circuit, holding circuit is controlled Signal Generator of Ultra-low Frequency by triggering and is connected with microprocessor, bridge diagram is connected with microprocessor by analog to digital conversion, microprocessor is also connected with communication module, optical isolation, warning device and display device, and photoelectricity isolation is by serial ports connection data harvester,
Described data collector includes the more than one group analog selection switch being connected, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit and microprocessor, described analog selection switch obtains sensor current signal by mobile sensor, described supervision host computer control Signal Generator of Ultra-low Frequency work is exported synchronizing signal to the phase comparator of data collector simultaneously, supervising host supervision after busbar grounding, main frame injects ultra-low frequency signal source to straight-flow system, the induction current that reception mobile sensor is sent in data acquisition here is through analog selection switch, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit is sent into microprocessor and is processed, by the serial line interface of microprocessor, send into supervision main frame again,
Described mobile sensor is stuck on each branch road loop of bus, if having resistance eutral grounding on branch road loop, the sensor being contained on this branch road produces induction current, and the resistance of faradic size and grounding resistance is inversely proportional to.
Being set as of null-type bridge circuit and unbalance bridge circuit in described bridge diagram: set according to the principle of scene original straight-flow system power supply monitoring instrument, when the circuit of original transformer station is balancing circuitry, if electric bridge can not exit after equipment produces fault, when dropping into again transformer station direct current system mobile insulation monitor, while first adopting unbalanced circuit monitoring, the modified value of setting device parameter is set as 0 and drops into and measure again, measure the resistance value on balance bridge on original equipment, after the resistance value of measuring is done to modified value and is revised, select again balancing circuitry to measure, monitor is when asking for stake resistance, CPU can change the coefficient in former computing formula according to the modified value of setting, can eliminate former balancing circuitry impact, make the monitoring of equipment that drops into again accurate, can not produce wrong report, when the circuit of original transformer station is unbalanced circuit, if former straight-flow system power supply monitoring equipment produces after fault, for prevent that the device of two cover unbalanced circuit work from dropping into simultaneously, the error detection causing or wrong report, need first by after failed equipment power-off, in like manner adopt above-mentioned unbalanced bridge method to measure, carry out data correction, and then drop into unbalanced circuit operation.Due to unbalanced circuit monitoring, computing formula more complicated, when to larger stake resistance, computational accuracy is poor, therefore takes to test calibration steps, deposits the data list of experiment gained in register, by former setting modified value, carry out computation of table lookup processing again, eliminate former balancing circuitry to the Accuracy of measuring, make the monitoring of equipment that drops into again accurate, can not produce wrong report.Described mobile sensor is caliper brake movable sensor, and described clamp are that ferromagnetic material is made, and adopts electromagnetic screen.Described clamp are the caliper brake detection probe that disposes different size and shape.
Described data collector adopts operational amplifier and the data amplifier of low noise, low drift, low-power consumption, high-isolation, high-precision A/D converter, the chip microprocessor that function is stronger, form narrow band filter, phase comparator, the thick signal converter of essence, and carry out information and date processing, measured value automatic calibration, by designing strong, the highly sensitive circuit of new antijamming capability and new signal processing method, improves sensitivity and the antijamming capability of detection instrument.If branch road has resistance eutral grounding on loop, the sensor being contained on this branch road produces induction current, and the resistance of faradic size and grounding resistance is inversely proportional to.Sensor current signal is changed, is sent CPU to carry out data processing, then send into main frame by RS485 interface through analog selection switch, amplification, bandpass filtering, phase bit comparison, filtering, A/D.Main frame on the one hand control signal acquisition module gathers each branch road transducing signal orderlyly, receives again on the other hand the data that signal acquisition module is sent here.Phase comparator in signal acquisition module, its effect is to eliminate the impact on measurement of Grounding Resistance degree of accuracy of ground capacitance on branch road loop, also can overcome asynchronous AC signal on bus simultaneously and disturb.After treatment, liquor charging crystal display shows and output alarm the data that main frame receives on the one hand, sends data to host computer on the other hand by communication interface circuit.
It is same as the prior art that the present embodiment is not stated part.
Claims (6)
1. a transformer station direct current system mobile insulation monitor, it is characterized in that: include supervision main frame, data collector and mobile sensor, described supervision main frame includes bridge diagram, holding circuit, Signal Generator of Ultra-low Frequency, analog to digital conversion circuit, microprocessor, warning device, display device, communication module, optical isolation, described holding circuit realizes bus monitoring, at bridge diagram, detect after busbar grounding, holding circuit controls Signal Generator of Ultra-low Frequency work and synchronous output synchronizing signal arrives data collector, described bridge diagram includes balance bridge testing circuit and uneven bridge testing circuit, holding circuit is controlled Signal Generator of Ultra-low Frequency by triggering and is connected with microprocessor, bridge diagram is connected with microprocessor by analog to digital conversion, microprocessor is also connected with communication module, optical isolation, warning device and display device, and optical isolation is by serial ports connection data harvester,
Described data collector includes the more than one group analog selection switch being connected, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit and microprocessor, described analog selection switch obtains sensor current signal by mobile sensor, described supervision host computer control Signal Generator of Ultra-low Frequency work is exported synchronizing signal to the phase comparator of data collector simultaneously, supervising host supervision after busbar grounding, main frame injects ultra-low frequency signal source to straight-flow system, the induction current that reception mobile sensor is sent in data acquisition here is through analog selection switch, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit is sent into microprocessor and is processed, by the serial line interface of microprocessor, send into supervision main frame again,
Described mobile sensor is stuck on each branch road loop of bus, if having resistance eutral grounding on branch road loop, the sensor being contained on this branch road produces induction current, and the resistance of faradic size and grounding resistance is inversely proportional to.
2. a kind of transformer station direct current system mobile insulation monitor according to claim 1, it is characterized in that: being set as of null-type bridge circuit and unbalance bridge circuit in described bridge diagram: set according to the principle of scene original straight-flow system power supply monitoring instrument, when the circuit of original transformer station is balancing circuitry, if electric bridge can not exit after equipment produces fault, when dropping into again transformer station direct current system mobile insulation monitor, while first adopting unbalanced circuit monitoring, the modified value of setting device parameter is set as 0 and drops into and measure again, measure the resistance value on balance bridge on original equipment, after the resistance value of measuring is done to modified value and is revised, select again balancing circuitry to measure, monitor is when asking for stake resistance, CPU can change the coefficient in former computing formula according to the modified value of setting, can eliminate former balancing circuitry impact, make the monitoring of equipment that drops into again accurate, can not produce wrong report, when the circuit of original transformer station is unbalanced circuit, if former straight-flow system power supply monitoring equipment produces after fault, for prevent that the device of two cover unbalanced circuit work from dropping into simultaneously, the error detection causing or wrong report, need first by after failed equipment power-off, in like manner adopt above-mentioned unbalanced bridge method to measure, carry out data correction, and then drop into unbalanced circuit and move
Due to unbalanced circuit monitoring, computing formula more complicated, when to larger stake resistance, computational accuracy is poor, therefore takes to test calibration steps, deposits the data list of experiment gained in register, by former setting modified value, carry out computation of table lookup processing again, eliminate former balancing circuitry to the Accuracy of measuring, make the monitoring of equipment that drops into again accurate, can not produce wrong report.
3. a kind of transformer station direct current system mobile insulation monitor according to claim 2, is characterized in that: described mobile sensor is caliper brake movable sensor, and described clamp are that ferromagnetic material is made, and adopts electromagnetic screen.
4. a kind of transformer station direct current system mobile insulation monitor according to claim 3, is characterized in that: described clamp are the caliper brake detection probe that disposes different size and shape.
5. a kind of transformer station direct current system mobile insulation monitor according to claim 4, is characterized in that: the amplifier in described data collector is for adopting operational amplifier and the data amplifier of low noise, low drift, low-power consumption, high-isolation.
6. a kind of transformer station direct current system mobile insulation monitor according to claim 5, is characterized in that: the workflow of the microprocessor of described supervision main frame is:
Mobile insulation monitor is being carried out after correct parameter arranges, supervisory device normally puts into operation, and carry out in real time busbar voltage and bus insulation against ground and detect,
When the working voltage of DC bus collection and device arranges superpressure or under-voltage definite value compares, exceed while arranging after definite value, sending " bus superpressure " or " bus is under-voltage " reports to the police, light and drive host apparatus panel " overpressure alarm " or " undervoltage warning " pilot lamp, connect " ultra under-pressure warning " hard contact simultaneously
Then according to the electric bridge of setting, detect bus insulation against ground situation, when detecting bus resistance to earth value, be less than when insulation resistance definite value is set, send " insulation alarm ", light and drive host apparatus panel " insulation alarm " pilot lamp, connect " insulation alarm " hard contact simultaneously
After detecting busbar grounding, host CPU is controlled Signal Generator of Ultra-low Frequency and is injected ultralow frequency AC signal to bus, sends synchronizing signal to the phase correlation device of data collector simultaneously,
The induction current that reception mobile sensor is sent in data acquisition here is through analog selection switch, amplifier, bandpass filter, phase comparator, wave filter, analog to digital conversion circuit is sent into microprocessor and is processed, by the serial line interface of microprocessor, send into supervision main frame again, supervision main frame is patrolled and examined branch road sample information by road, described nearly information comprises amplitude and phase place, the grounding threshold value of setting with device compares, thereby judge ground connection branch road and grounding resistance, after branch road generation ground connection having been detected, send " branch road warning ", light and drive host apparatus panel " branch road warning " pilot lamp, connect " branch road warning " hard contact simultaneously, if all branch roads being are all are being patrolled and examined one time, do not find ground connection branch road, return to starting point and carry out bus detection, repeat above-mentioned work,
After the said equipment is reported to the police, CPU controls communication module simultaneously, by the communication modes such as 485,232, warning and action message is uploaded to remote monitoring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534570.4A CN103675613B (en) | 2013-11-01 | 2013-11-01 | Transformer station DC system movable type insulation supervision instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310534570.4A CN103675613B (en) | 2013-11-01 | 2013-11-01 | Transformer station DC system movable type insulation supervision instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103675613A true CN103675613A (en) | 2014-03-26 |
| CN103675613B CN103675613B (en) | 2017-07-18 |
Family
ID=50313771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310534570.4A Active CN103675613B (en) | 2013-11-01 | 2013-11-01 | Transformer station DC system movable type insulation supervision instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103675613B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247211A (en) * | 2017-08-14 | 2017-10-13 | 浙江省星炬科技有限公司 | A kind of AC and DC insulation fault location system |
| CN109375117A (en) * | 2018-07-31 | 2019-02-22 | 国网江苏省电力有限公司徐州供电分公司 | A kind of intelligent substation integrated power supply Insulation Inspection System based on bridge method and DC leakage current method |
| CN106546825B (en) * | 2016-09-29 | 2022-07-01 | 北京国电光宇机电设备有限公司 | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466071A (en) * | 1981-09-28 | 1984-08-14 | Texas A&M University System | High impedance fault detection apparatus and method |
| CN2232145Y (en) * | 1995-04-26 | 1996-07-31 | 青岛电业局 | Movable high voltage insulation test meter |
| CN2553386Y (en) * | 2002-07-04 | 2003-05-28 | 陈虎 | D.C. system earthing detector |
| CN1715937A (en) * | 2005-06-28 | 2006-01-04 | 天津大学 | Detecting device and its method for DC system earthing fault |
| CN102135594A (en) * | 2011-01-30 | 2011-07-27 | 太原理工大学 | Insulation state monitoring device of high voltage motor for main fan used for mine |
| CN102486496A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Direct current insulation monitoring system and method capable of overcoming relay protection maloperation |
| CN202433486U (en) * | 2012-01-06 | 2012-09-12 | 武汉英康铁路电气设备工程有限公司 | Online insulation monitoring device of high-voltage equipment of traction substation |
| CN202886514U (en) * | 2012-11-13 | 2013-04-17 | 浙江省星炬科技有限公司 | Direct current (DC) system grounding detector |
| CN203069728U (en) * | 2013-02-05 | 2013-07-17 | 山东电力集团公司东营供电公司 | Portable DC grounding system fault locator |
| CN203164334U (en) * | 2013-03-26 | 2013-08-28 | 南京再造科技有限公司 | Mobile power quality analyzer |
-
2013
- 2013-11-01 CN CN201310534570.4A patent/CN103675613B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466071A (en) * | 1981-09-28 | 1984-08-14 | Texas A&M University System | High impedance fault detection apparatus and method |
| CN2232145Y (en) * | 1995-04-26 | 1996-07-31 | 青岛电业局 | Movable high voltage insulation test meter |
| CN2553386Y (en) * | 2002-07-04 | 2003-05-28 | 陈虎 | D.C. system earthing detector |
| CN1715937A (en) * | 2005-06-28 | 2006-01-04 | 天津大学 | Detecting device and its method for DC system earthing fault |
| CN102486496A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Direct current insulation monitoring system and method capable of overcoming relay protection maloperation |
| CN102135594A (en) * | 2011-01-30 | 2011-07-27 | 太原理工大学 | Insulation state monitoring device of high voltage motor for main fan used for mine |
| CN202433486U (en) * | 2012-01-06 | 2012-09-12 | 武汉英康铁路电气设备工程有限公司 | Online insulation monitoring device of high-voltage equipment of traction substation |
| CN202886514U (en) * | 2012-11-13 | 2013-04-17 | 浙江省星炬科技有限公司 | Direct current (DC) system grounding detector |
| CN203069728U (en) * | 2013-02-05 | 2013-07-17 | 山东电力集团公司东营供电公司 | Portable DC grounding system fault locator |
| CN203164334U (en) * | 2013-03-26 | 2013-08-28 | 南京再造科技有限公司 | Mobile power quality analyzer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546825B (en) * | 2016-09-29 | 2022-07-01 | 北京国电光宇机电设备有限公司 | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system |
| CN107247211A (en) * | 2017-08-14 | 2017-10-13 | 浙江省星炬科技有限公司 | A kind of AC and DC insulation fault location system |
| CN109375117A (en) * | 2018-07-31 | 2019-02-22 | 国网江苏省电力有限公司徐州供电分公司 | A kind of intelligent substation integrated power supply Insulation Inspection System based on bridge method and DC leakage current method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103675613B (en) | 2017-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103135038B (en) | Straight-flow system exchanges crosstalk and insulation fault monitoring selection method | |
| CN103293443B (en) | A kind of distribution network overhead line Earth design method | |
| CN105022020B (en) | Electric energy meter radio frequency electromagnetic field, radio immunity experiment test system and method | |
| CN102901908B (en) | Cable operation information monitoring system and implement method thereof | |
| CN102298107A (en) | Portable ultrasonic wave and cloud detection apparatus for partial discharge | |
| CN202066932U (en) | Potable partial-discharge ultrasonic cloud detection device | |
| CN203241494U (en) | Direct current system AC series current fault and insulation fault monitoring line-selection apparatus | |
| CN105467241A (en) | A distributed converter transformer direct current bias detection system and a detection method thereof | |
| CN201965191U (en) | Capacitor intelligentizing device | |
| CN103389447A (en) | Non-contact ultraviolet pulse discharge monitoring device | |
| CN103323655B (en) | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method | |
| CN105301464A (en) | Movable type ultrahigh frequency partial discharge on-line monitoring system | |
| CN103675532A (en) | GIS (gas insulated switchgear) fault diagnosis device and GIS fault diagnosis method | |
| CN203324380U (en) | Direct-current source system insulation monitoring apparatus and monitoring host thereof | |
| CN106707196A (en) | Portable mobile alternating current intrusion fault detection and positioning device | |
| CN203658521U (en) | Mobile insulation supervision instrument of transformer station DC system | |
| CN202075376U (en) | GIS (gas-insulated switchgear) partial discharge monitoring device | |
| CN211452424U (en) | Electrified detecting system based on multiple wireless sensors | |
| CN102879718B (en) | Wired-loop-based entire-station monitoring and positioning system and positioning method for partial discharge | |
| CN204214974U (en) | High voltage power cable terminal on-Line Monitor Device | |
| CN103675613A (en) | Transformer station DC system movable type insulation supervision instrument | |
| CN204925226U (en) | Blocking device is gathered to high voltage live display wide region | |
| CN105371742A (en) | Bushing tap pulse signal injection method-based transformer winding deformation detection device and method | |
| CN203310903U (en) | Transformer iron core earth current online monitor | |
| CN106249031A (en) | Power frequency high voltage measuring device with electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |