CN206523590U - On-line insulation monitoring device and its system - Google Patents
On-line insulation monitoring device and its system Download PDFInfo
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- CN206523590U CN206523590U CN201720247574.8U CN201720247574U CN206523590U CN 206523590 U CN206523590 U CN 206523590U CN 201720247574 U CN201720247574 U CN 201720247574U CN 206523590 U CN206523590 U CN 206523590U
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Abstract
The utility model provides a kind of on-line insulation monitoring device and its system, is related to the technical field of insulating monitoring, the device includes：High-tension resistive, detection and analysis device and tested power equipment, wherein, tested power equipment is connected by power transmission cable with AC power；The input of high-tension resistive is connected with the bus of tested power equipment, and the output end of high-tension resistive is connected with detection and analysis device；Testing and analyzing device is used to detect target electric signal by high-tension resistive, and target electric signal is analyzed, to determine the insulating properties of tested power equipment according to analysis result, wherein, target electric signal includes at least one of：The insulating resistance value of tested power equipment, the leakage current corresponding with insulating resistance value.The utility model alleviates the poor technical problem of traditional insulation monitoring and warning device Monitoring Performance.
Description
Technical field
The utility model is related to the technical field of insulating monitoring, more particularly, to a kind of on-line insulation monitoring device and its is
System.
Background technology
It is traditional that carry out Insulation Live Testing method to high voltage electric equipment is partial discharge detecting system.For example, high
Medium-voltage Motor stator winding partial discharge detecting system, partial discharge monitoring is diagnosis Stator Winding of High Voltage Motor insulation fault
One of effective ways, the several method of domestic and international high-voltage motor partial discharge monitoring：Based on pairwise coupling on collector ring
The monitoring method of capacitor, based on centerline radio-frequency monitoring method, based on the monitoring method of coupler on motor lead-out wire, based on stator slot coupling
The monitoring method of clutch, and based on monitoring method of resistance temperature component connection wire being embedded in stator slot etc..For example, based on remittance
Pairwise coupling capacitor monitoring method on ring is flowed, the method need to use PDA monitors, and the monitor is portable, can be used for prison
Survey the generator for being provided with coupled capacitor device.The every of usual motor mutually has a pair, or each pair parallel branch has a pair of couplers,
At least three pairs couplers of one motor, and coupler is all connected in the link box of outside motor by coaxial wire.
In another example, based on centerline radio-frequency monitoring method, in the on-line monitoring of large-size machine, in also a kind of winding from generator unit stator
Line monitors radiofrequency signal, and its signal is typically to be utilized with signal of the wide band current sensor pickup of high frequency etc..Rf monitoring
Instrument monitors the arc discharge of large turbo-type generator.
What prior art was showed in high-voltage electric power system is all more complicated cumbersome, and the scope of application is narrower, and
And be all mostly to apply the high-frequency impulse component of shelf depreciation to judge the damaged condition of insulation, this can not reflect really
Insulation situation, it is more complicated in terms of sensor, be not suitable for large-scale power system application.Existing product is using being also very uneasy
Entirely, and operation it is more complicated, in-convenience in use, increase the input of manpower and material resources, it is necessary to which business unit's personnel assigned is gone
In-site measurement increases workload, reduces the benefit of production and enterprise.This is a very big disadvantage in high-voltage electric power system
End.
Utility model content
The purpose of this utility model is to provide a kind of on-line insulation monitoring device and its system, traditional exhausted to alleviate
The poor technical problem of edge monitoring device Monitoring Performance.
According to one side of the present utility model there is provided a kind of on-line insulation monitoring device, the device includes：High-tension electricity
Resistance, detection and analysis device and tested power equipment, wherein, the tested power equipment is connected by power transmission cable and AC power
Connect；The input of the high-tension resistive is connected with the bus of the tested power equipment, the output end of the high-tension resistive with
The detection and analysis device is connected；The detection and analysis device is used to detect target electric signal by the high-tension resistive,
And the target electric signal is analyzed, to determine the insulating properties of the tested power equipment according to analysis result, its
In, the target electric signal includes at least one of：The insulating resistance value of the tested power equipment, with the insulated electro
The corresponding leakage current of resistance.
Further, the detection and analysis device includes：Main control circuit and main test circuit, the main control circuit and
The main test circuit is communicated to connect by order wire, wherein, the main test circuit is used to launch high to the power transmission cable
Straightening stream, and detect after the HVDC is launched the target electric signal, and by the order wire to the master
Circuit is controlled to send the target electric signal, so that the main control circuit is analyzed the target electric signal, with
Determine the insulating properties of the tested power equipment.
Further, the main control circuit also includes：Alarm, the alarm and the master in the main control circuit
Control circuit is connected, and the alarm signal for being sent according to the main control circuit is alarmed.
Further, the main control circuit includes following any：Single-chip microcomputer, DSP, PLC, FPGA.
Further, the main test circuit includes：First current sensing means, first current sensing means and institute
Main control circuit is stated to be connected, for after the HVDC is launched, detecting the current value for flowing through the high-tension resistive, and
The current value of the high-tension resistive is sent to the main control circuit；Wherein, the main control circuit is receiving the high pressure
After the current value of resistance, the insulating resistance value is determined according to the current value of the high-tension resistive.
Further, the main test circuit also includes：Second current sensing means, the second current sensing means ring
Be around in the bus of the tested power equipment, and be connected with the main control circuit, for launch the HVDC it
After detect the leakage current, and send the leakage current to the main control circuit.
Further, the main test circuit also includes：Triode and relay, the input of the triode with it is described
Main control circuit is connected, and the output end of the triode is connected with the relay, wherein, the triode is used for institute
State relay to be controlled, so that the relay switches first current sensing means and second current sensing means
Acquisition state.
Further, the main test circuit also includes：High pressure transmitter module, the high pressure transmitter module and the relay
Device is electrically connected, under the control of the relay, HVDC to be launched to the power transmission cable.
Further, described device also includes：Communicator, the communicator is used to set up host computer and described online
Communication connection between insulation monitoring and warning device, wherein, the communicator includes at least one of：RS485 communicators,
RS232 communicators, ethernet communication device, Bluetooth communication device, WIFI communicators.
According to other side of the present utility model, a kind of on-line insulation monitoring system is additionally provided, the system includes upper
Any one on-line insulation monitoring device and host computer are stated, wherein, the on-line insulation monitoring device and the host computer lead to
Communicator is crossed to be connected.
In the on-line insulation monitoring device that the utility model embodiment is provided, including high-tension resistive, test and analyze device
With tested power equipment, wherein, tested power equipment is connected by power transmission cable with AC power；The input of high-tension resistive with
The bus of tested power equipment is connected, and the output end of high-tension resistive is connected with detection and analysis device；Device is tested and analyzed to use
In detecting target electric signal by high-tension resistive, and target electric signal is analyzed, to determine quilt according to analysis result
The insulating properties of power equipment are surveyed, wherein, target electric signal includes at least one of：The insulaion resistance of tested power equipment
Value, the leakage current corresponding with insulating resistance value by way of setting high-tension resistive at bus end, has reached accurate measurement
The purpose of the insulation parameter of power equipment is tested, and then alleviates the poor technology of traditional insulation monitoring and warning device Monitoring Performance and is asked
Topic, it is achieved thereby that improving the technique effect of the Monitoring Performance of on-line insulation monitoring device.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic diagram of on-line insulation monitoring device according to the utility model embodiment；
Fig. 2 is a kind of schematic diagram of optional main test circuit according to the utility model embodiment；
Fig. 3 is a kind of rough schematic view of optional Master control chip according to the utility model embodiment；
Fig. 4 is a kind of schematic diagram of optional first current sensing means according to the utility model embodiment；
Fig. 5 is a kind of schematic diagram of optional second current sensing means according to the utility model embodiment.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only
Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Embodiment one
According to the utility model embodiment, there is provided a kind of embodiment of on-line insulation monitoring device.Fig. 1 is according to this reality
With a kind of schematic diagram of on-line insulation monitoring device of new embodiment, as shown in figure 1, the device includes：High-tension resistive 10, inspection
Analytical equipment 20 and tested power equipment 30 are surveyed, wherein,
Tested power equipment 30 is connected by power transmission cable with three-phase alternating-current supply；
It should be noted that as shown in figure 1, explanation is introduced in tested power equipment by taking high-voltage motor as an example.
The input of high-tension resistive 10 is connected with the bus of tested power equipment 30, the output end of high-tension resistive 10 and inspection
Analytical equipment 20 is surveyed to be connected；
It should be noted that high-tension resistive 10 as shown in Figure 1 be 3 resistance be in parallel obtained from resistance, that is,
Say, a resistance has been all connected with A, B and the C threephase cable of power transmission cable.
Testing and analyzing device 20 is used to detect target electric signal by high-tension resistive 10, and target electric signal is carried out
Analysis, to determine the insulating properties of tested power equipment 30 according to analysis result, wherein, target electric signal include it is following at least
One of：The insulating resistance value of tested power equipment, the leakage current corresponding with insulating resistance value；
It should be noted that detection and analysis device as shown in Figure 1 is divided into detection means and analytical equipment, wherein, detection
Device is properly termed as main test circuit again, and analytical equipment is properly termed as main control circuit again.
Specifically, detection means is mainly for detection of target electric signal, wherein, the target electric signal is used to react quilt
Survey the insulating properties of power equipment.For example, the insulating resistance value of tested power equipment, and the leakage corresponding with insulating resistance value
Electric current.
In the on-line insulation monitoring device that the utility model embodiment is provided, including high-tension resistive, test and analyze device
With tested power equipment, wherein, tested power equipment is connected by power transmission cable with AC power；The input of high-tension resistive with
The bus of tested power equipment is connected, and the output end of high-tension resistive is connected with detection and analysis device；Device is tested and analyzed to use
In detecting target electric signal by high-tension resistive, and target electric signal is analyzed, to determine quilt according to analysis result
The insulating properties of power equipment are surveyed, wherein, target electric signal includes at least one of：The insulaion resistance of tested power equipment
Value, the leakage current corresponding with insulating resistance value by way of setting high-tension resistive at bus end, has reached accurate measurement
The purpose of the insulation parameter of power equipment is tested, and then alleviates the poor technology of traditional insulation monitoring and warning device Monitoring Performance and is asked
Topic, it is achieved thereby that improving the technique effect of the Monitoring Performance of on-line insulation monitoring device.
Further, as shown in figure 1, going back on-line insulation monitoring device also includes upper computer software, upper computer software peace
In terminal device as shown in Figure 1, the terminal device is preferably PC.It should be noted that in addition to PC, may be used also
To choose other terminal devices, PC is not scheduled now.
In an optional embodiment of the utility model embodiment, detection and analysis device 20 includes：Main control circuit
With main test circuit, main control circuit and main test circuit are communicated to connect by order wire, wherein, main test circuit is used for defeated
Electric cable transmission HVDC, and target electric signal is detected after transmitting HVDC, and by order wire to main control
Circuit sends target electric signal, so that main control circuit is analyzed target electric signal, to determine tested power equipment
Insulating properties.
It should be noted that the Master control chip in above-mentioned main control circuit can be to be chosen for single-chip microcomputer, data signal
Processor (Digital Signal Processing, abbreviation DSP), programmable logic controller (PLC) (Programmable Logic
Controller, abbreviation PLC), and field programmable gate array (Field-Programmable Gate Array, referred to as
FPGA).Preferably, in the utility model embodiment, selection model ATmega128-16AC single-chip microcomputer is used as master control
The Master control chip of circuit processed.In the case, in addition to the Master control chip, in addition to additional circuit, for example, downloading mouth
Circuit, clock circuit, differential amplifier circuit and multi-analog on-off circuit etc..Specifically, the operation principle of additional circuit
No longer describe in detail.
In another optional embodiment of the utility model embodiment, above-mentioned main test circuit also includes：Triode,
Relay and high pressure transmitter module.
Wherein, the input of triode is connected with main control circuit, and the output end of triode is connected with relay, its
In, triode is used to be controlled relay, so that relay switches following first current sensing means and following second electricity
The acquisition state of flow detection device；High pressure transmitter module is electrically connected with relay, under the control of relay, to power transmission line
Cable launches HVDC.
As shown in Fig. 2 the circuit shown in Fig. 2 is by triode S8050, relay and high pressure transmitter module HIGHVOL compositions.
In fig. 2, " PD1 " represents that the base stage of the triode is connected with the PD1 pins of the Master control chip in main control circuit,
" PD0 " represents that the output end of the operational amplifier is connected with the PD0 pins of the Master control chip in main control circuit.Need
Bright, triode and operational amplifier also have to not necessarily be connected with " PD1 " and " PD0 " pin, and symbol is it is merely meant that three
Pole pipe and operational amplifier are electrically connected with the Master control chip in main control circuit.
In the utility model embodiment, mainly pass through following first current sensing means of circuit realiration as shown in Figure 2
Switching between following second current sensing means.Specifically, mainly relay is controlled by the turn-on and turn-off of triode
Device, and then operational amplifier OP07CS output is controlled by the output of relay, finally, according to operational amplifier OP07CS
Output result determine the detection state of the second current sensing means and the first current sensing means.For example, when triode control
During relay adhesive, during operational amplifier OP07CS output high level, the first current sensing means is detected, the second electric current
Detection means is without detection；When triode control relay is off, operational amplifier OP07CS output is low
During level, the first current sensing means is detected without detection, the second current sensing means.
Fig. 3 is the rough schematic view of Master control chip, input and output for representing signal.From figure 3, it can be seen that
The PD1 pins of Master control chip in the base stage main control circuit of triode are connected, the output end of operational amplifier and master control
The PD0 pins of Master control chip in circuit processed are connected.
In another optional embodiment of the utility model embodiment, above-mentioned main test circuit also includes：First electricity
Flow detection device and the second current sensing means.
Specifically, the first current sensing means is connected with main control circuit, for after transmitting HVDC, detecting
Flow through the current value of high-tension resistive, and send to main control circuit the current value of high-tension resistive；Wherein, main control circuit is being received
To after the current value of high-tension resistive, insulating resistance value is determined according to the current value of high-tension resistive.
As shown in Figure 4 is the schematic diagram of the first current sensing means, as can be seen that the first electric current from Fig. 3 and Fig. 4
" V+ " and " V- " end of detection means is connected with " V+ " and " V- " two pins of Master control chip, for detection stream over sampling
The electric current of resistance, wherein, sample resistance is the resistance being pre-installed in main test circuit, by the electricity for measuring sample resistance
Stream, it is possible to obtain flowing through the electric current of high-tension resistive, and then, the insulaion resistance of tested power equipment is can be obtained by by conversion
Value.
Specifically, in the utility model embodiment, high-voltage power system insulation is measured using the stacking method of direct current
Can, for example, HVDC (1500~2500V of DC) is superimposed upon on powered ac high voltage, set so as to measure tested electric power
The faint DC current of standby insulating barrier, is then converted into the resistance of insulaion resistance, so as to judge by the resistance of sample resistance
Whether the insulating properties for going out measured bus and power equipment is good.
Specifically, the second current sensing means is surrounded on the bus of tested power equipment, and is connected with main control circuit,
Leakage current is sent for detecting leakage current after transmitting HVDC, and to main control circuit.
Preferably, in the utility model embodiment, annular magnet ring is chosen as the second current sensing means, specifically
Ground, can enter the annular magnetic ring set in high voltage bus, the electric current sent by induced field, be measured by conversion,
The insulating properties for being tested power equipment are judged by the strong and weak judgement of electric current.Then, it will be gathered in real time by communication
Data transfer is to upper computer software, if the standard value that measured value is set with software end is not inconsistent, and may occur in which early warning or alarm work(
Can, reminder alarm is sent, and send SMS in real time to director.
As shown in Figure 5 is the circuit diagram of the second current sensing means.As shown in figure 5, " M1 " and " M2 " is the electricity
The output end on road, the electric current exported by the output end can finally obtain leakage current by the amplification of amplifying circuit again.Need
It is noted that " M1 " and " M2 " shown in Fig. 5 is held for connecting the signal processing circuits such as amplifying circuit, specifically, signal
Process circuit is not drawn into the accompanying drawings.
In another optional embodiment of the utility model embodiment, main control circuit also includes：Alarm, alarm
Device is connected with the main control circuit in main control circuit, and the alarm signal for being sent according to main control circuit is alarmed.
Specifically, alarm can be by a triode and a relay group into the analysis by Master control chip to data is exported
Signal-controlled switch triode realizes the adhesive of relay so as to control electric bell, reaches electric bell alarming function.
In another optional embodiment of the utility model embodiment, the device also includes：Communicator, communication dress
Put for setting up the communication connection between host computer and on-line insulation monitoring device, wherein, communicator include it is following at least it
One：RS485 communicators, RS232 communicators, ethernet communication device, Bluetooth communication device, WIFI communicators.
It should be noted that in the utility model embodiment, a shooting dress can also be set in main test circuit
Put, the Video stream information or image information of working environment residing for tested power equipment are shot by the camera device.Then, lead to
Ethernet communication device is crossed, or, WIFI communicators transmit the Video stream information or image information to host computer, so that
Staff is monitored to the running status for being tested power equipment in real time.
To sum up, the on-line insulation monitoring device that the utility model embodiment is provided, employs special high-voltage insulating resistance,
Military project rank is can reach, is connected to by three resistor coupled in parallel modes on high voltage bus, security, and reliability are very high, have led to
Crossing test of many times proves.And Conversion Analysis sampling is carried out by the Weak current for flowing through high-tension resistive, so as to judge to be measured
Whether the insulating properties of bus and power equipment is good.High voltage bus can also be entered with annular magnetic ring set, sent out by induced field
The electric current gone out, the judgement of insulating properties is carried out to being detected examining system by the strong and weak judgement of electric current.The utility model embodiment can
To ensure real time on-line monitoring function, it is not necessary to manually nursed, only personnel need to be arranged periodically to carry out Maintenance and Repair.This
Utility model embodiment can be connected to me and taken charge of in the software of independent development by 485 communication interfaces in itself that carry, to items monitoring
Data measure reading and saving, it is possible to carry out various functions setting to the instrument at scene by upper computer software, annex
Short message prompting function, alarming short message is sent when power system and equipment go wrong at any time, reminds going out for director's accident
It is existing, the frequency of accident is greatly reduced, the loss of business unit is reduced.The utility model embodiment has taken leave of old-fashioned tradition
Insulating megger, and other insulation test method is easy to operate with easy for installation, the advantages of strong applicability.
Relative to traditional on-line insulation monitoring device, the on-line insulation monitoring device tool that the utility model embodiment is provided
Have the advantage that：
1st, measurement accuracy is high
The utility model is implemented to use DC superposition method, and HVDC is added to tested power equipment, passes through high accuracy
The high-tension resistive of partial pressure and high-precision sample resistance, are handled gathered data signal, then, by low power high speed monolithic
Machine is quickly handled, and data are shown by upper computer software, and error can reach 0.03%, in equivalent technology industry
In precision be considerable.
2nd, antisurge thunderbolt and stress levels are high
The utility model is implemented to consider the place of application emphatically at that time in design, and surge and the pressure-resistant emphasis that done are set
Meter, has been reached IV grades of standards of industry highest standard, has been more applicable for industrial rank, to that can be carried out due to the accident that electricity consumption is produced
Self-protection, protective capability is stronger, is the outstanding person in the same industry.
3rd, anti-interference radianting capacity is strong and low-power consumption
The utility model implements Electro Magnetic Compatibility (Electro Magnetic Compatibility, abbreviation EMC) grade
It is very high, have very for the electromagnetic interference produced by electromagnetic interference (Electro Magnetic Interference, abbreviation EMI)
Strong anti-shot ability, is tested by repeatedly high level grade, including electrostatic, decaying wave, pulses of radiation group etc., anti-interference energy
Power is very strong, is different from homogeneous e product, safety and protective value reach military project level, and power consumption is very low, and heating is very
It is low, energy-saving safe.
4th, environment adapts to strong
The utility model is implemented to have passed through thermocycling, and has carried out embedding protection to internal circuit, prevents device
Loosen and sealed heat-dissipating, not only can indoors work, can also be worked under moist rugged environment.
The 5th, simple and convenient, shell autonomous Design is installed
The utility model is implemented to have taken leave of the electronic equipment chassis of traditional type, and autonomous Design is completed, front and back panel and bottom
Plate all completes for machining center milling, and sealing is stronger, and Electro Magnetic Compatibility is good, and screw is easy for installation, and electromagnetism can be entered
The disconnected ripple of row, surface is the anti-corruption of black anodizing insulation.
Embodiment two
The utility model embodiment additionally provides a kind of on-line insulation monitoring system, and the on-line insulation monitoring system is mainly wrapped
On-line insulation monitoring device and the host computer described in above-described embodiment one are included, wherein, on-line insulation monitoring device and described
Host computer is connected by communicator, and communicator includes at least one of：RS485 communicators, RS232 communication dresses
Put, ethernet communication device, Bluetooth communication device, WIFI communicators.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of on-line insulation monitoring device, it is characterised in that including：High-tension resistive, detection and analysis device and tested electric power are set
It is standby, wherein,
The tested power equipment is connected by power transmission cable with AC power；
The input of the high-tension resistive is connected with the bus of the tested power equipment, the output end of the high-tension resistive with
The detection and analysis device is connected；
The detection and analysis device is used to detect target electric signal by the high-tension resistive, and to the target electric signal
Analyzed, to determine the insulating properties of the tested power equipment according to analysis result, wherein, the target electric signal bag
Include at least one of：The insulating resistance value of the tested power equipment, the leakage current corresponding with the insulating resistance value.
2. device according to claim 1, it is characterised in that the detection and analysis device includes：Main control circuit and master
Test circuit, the main control circuit and the main test circuit are communicated to connect by order wire,
Wherein, the main test circuit is used to launch HVDC to the power transmission cable, and launch the HVDC it
After detect the target electric signal, and the target electric signal is sent to the main control circuit by the order wire,
So that the main control circuit is analyzed the target electric signal, to determine the insulating properties of the tested power equipment
Energy.
3. device according to claim 2, it is characterised in that the main control circuit also includes：
Alarm, the alarm is connected with the main control circuit in the main control circuit, for according to the main control
The alarm signal that circuit is sent is alarmed.
4. device according to claim 3, it is characterised in that the main control circuit includes following any：Single-chip microcomputer,
DSP, PLC, FPGA.
5. device according to claim 2, it is characterised in that the main test circuit includes：
First current sensing means, first current sensing means is connected with the main control circuit, in transmitting institute
State after HVDC, the current value of the high-tension resistive is flowed through in detection, and sends the high-tension electricity to the main control circuit
The current value of resistance；
Wherein, the main control circuit is after the current value of the high-tension resistive is received, according to the electricity of the high-tension resistive
Flow valuve determines the insulating resistance value.
6. device according to claim 5, it is characterised in that the main test circuit also includes：
Second current sensing means, second current sensing means is surrounded on the bus of the tested power equipment, and with institute
State main control circuit to be connected, for detecting the leakage current after the HVDC is launched, and to the main control
Circuit sends the leakage current.
7. device according to claim 6, it is characterised in that the main test circuit also includes：Triode and relay,
The input of the triode is connected with the main control circuit, and the output end of the triode is connected with the relay
Connect,
Wherein, the triode is used to be controlled the relay, so that the relay switches the first electric current inspection
Survey the acquisition state of device and second current sensing means.
8. device according to claim 7, it is characterised in that the main test circuit also includes：
High pressure transmitter module, the high pressure transmitter module is electrically connected with the relay, under the control of the relay,
Launch HVDC to the power transmission cable.
9. device according to claim 1, it is characterised in that described device also includes：
Communicator, the communicator is used for the communication connection set up between host computer and the on-line insulation monitoring device,
Wherein, the communicator includes at least one of：RS485 communicators, RS232 communicators, ethernet communication device,
Bluetooth communication device, WIFI communicators.
10. a kind of on-line insulation monitoring system, it is characterised in that including online exhausted any one of the claims 1 to 9
Edge monitoring device and host computer, wherein, the on-line insulation monitoring device is connected with the host computer by communicator.
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| CN201720247574.8U CN206523590U (en) | 2017-03-14 | 2017-03-14 | On-line insulation monitoring device and its system |
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| CN201720247574.8U CN206523590U (en) | 2017-03-14 | 2017-03-14 | On-line insulation monitoring device and its system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376491A (en) * | 2019-07-12 | 2019-10-25 | 中国铁路北京局集团有限公司北京车辆段 | A kind of wiring systems insulation detecting method, device and insulation instrument |
| CN114280428A (en) * | 2021-11-11 | 2022-04-05 | 国网浙江省电力有限公司丽水供电公司 | High-voltage power insulation level online monitoring system |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376491A (en) * | 2019-07-12 | 2019-10-25 | 中国铁路北京局集团有限公司北京车辆段 | A kind of wiring systems insulation detecting method, device and insulation instrument |
| CN114280428A (en) * | 2021-11-11 | 2022-04-05 | 国网浙江省电力有限公司丽水供电公司 | High-voltage power insulation level online monitoring system |
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