CN106443144A - Distributed transient overvoltage monitoring system for EHV (extra-high voltage) GIS - Google Patents
Distributed transient overvoltage monitoring system for EHV (extra-high voltage) GIS Download PDFInfo
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- CN106443144A CN106443144A CN201510487119.0A CN201510487119A CN106443144A CN 106443144 A CN106443144 A CN 106443144A CN 201510487119 A CN201510487119 A CN 201510487119A CN 106443144 A CN106443144 A CN 106443144A
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Abstract
The invention provides a distributed transient overvoltage monitoring system for an EHV (extra-high voltage) GIS, and the system comprises a main control module, a plurality of transient overvoltage monitoring modules, and transient overvoltage sampling units. Each transient overvoltage sampling unit is connected with one transient overvoltage monitoring module. All transient overvoltage monitoring modules are connected to the main control module. The transient overvoltage sampling units are installed on the EHV GIS body. The system provided by the invention improves the anti-interference capability, can effectively and accurately monitor and record various types of transient overvoltage waveforms of GIS equipment, facilitates the mastering of the features of the transient overvoltage waveforms of the GIS equipment and the statistics of various types of overvoltage levels, and provides reliable and accurate basis for the insulation cooperation.
Description
Technical field
The present invention relates to over-voltage monitoring field is and in particular to a kind of extra-high voltage GIS monitors system with distributed transient overvoltage
System.
Background technology
In power industry, GIS refers to sulfur hexafluoride sealed combination electrical equipment, is referred to as " gas-insulated metal envelope in the world
Close switchgear " (Gas Insulated Switchgear), abbreviation GIS.It by a transformer station in addition to transformator
Primary equipment, including chopper, disconnecting switch, earthed switch, voltage transformer, current transformer, spark gap,
Bus, cable termination, inlet-outlet sleeve etc., optimized design is organically combined into an entirety.The advantage of GIS is
Floor space is little, and reliability is high, high safety, maintenance workload very little.GIS operationally often due to thunder and lightning or
Person's switching manipulation and produce thunder intrusion and switching overvoltage, this two classes overvoltage can be to setting in power system
Received shipment row works the mischief, and also neighbouring secondary device can be interfered or damage it is therefore necessary to UHV transmission system
The electro-magnetic transient of system launches research with overvoltage problem.
At present with the research of overvoltage problem, electromagnetic transient simulation is mainly adopted for the electro-magnetic transient of system for ultra-high voltage transmission
The method calculating, but actual various overvoltage meets the characteristic of probability distribution, the overvoltage level real to system
Need the accumulation through long-term measured data could grasp, at present to the measured data of the transient overvoltage of extra-high voltage still relatively
Lack.Although also there is the research that part is surveyed to 110kV and system above, current technology address only height
The problem of speed sampling, can capture lightning surge and change switching overvoltage faster.Due to analog input card memory capacity
Limit it is impossible to cover from power-frequency overvoltage to lightning surge the high sampling rate (＞ 5Msps) of such wide scope, long
The requirement of record time over-voltage monitoring.When high frequency sample frequency f as certain monitoring system capture card is set to 10Msps,
Its single continuous sampling length is 5ms, and low-frequency sampling frequency f is set to 100ksps, then its single continuous sampling length is
2s, but in the case of needing to predict wave character in advance, setting is it is impossible to automatically adapt to the change of waveform.Currently for extra-high
Pressure transmission system, all have no both at home and abroad surveyed for a long time, statistical study, to grasp the report of overvoltage probability density characteristicses
Road.In addition, to lightning surge it is possible to there is continuous several times thunderbolt, although some high speed acquisition systems current can
Realize the record of single measured length, because the speed that hardware unloading is processed is slower, do not possess the ability of continuous capturing, having can
Can be able to catch less than the follow-up transient voltage waveform occurring.
Therefore, for a set of high property having measurement Lightning Incoming Wave and switching overvoltage concurrently of ultra-high voltage GIS equipment research design
Energy transient overvoltage monitoring device is particularly necessary.
Content of the invention
In view of this, a kind of extra-high voltage GIS that the present invention provides is carried with distributed transient overvoltage monitoring system, this system
The high capacity of resisting disturbance of monitoring system, can efficiently and accurately monitor simultaneously and record the various transient state mistakes of GIS device
Voltage waveform, is conducive to grasping GIS device transient overvoltage wave character and counts all kinds of overvoltage levels, join for insulation
Conjunction provides reliable and accurate foundation.
The purpose of the present invention is achieved through the following technical solutions：
With distributed transient overvoltage monitoring system, it is equal that described monitoring system includes analog channel voltage to a kind of extra-high voltage GIS
The main control module of the isolation voltage for 2000V, some transient overvoltage monitoring modulars and transient overvoltage sampling unit；
Each described transient overvoltage sampling unit is all connected with a described transient overvoltage monitoring modular；Whole institutes
State transient overvoltage monitoring modular and be connected to described main control module；
Described transient overvoltage sampling unit is arranged on extra-high voltage GIS body.
Preferably, described main control module includes optical fiber switch and main website control computer；
Described main website control computer is provided with IEC61850 client control platform software；
Described master station computer pass through described optical fiber switch in fiber optic Ethernet with described transient overvoltage monitoring modular
Communication；And communication protocol meets IEC61850 standard；
Some described transient overvoltage monitoring modulars are connected to described optical fiber switch with optical fiber respectively.
Preferably, described optical fiber switch and main website control computer are arranged at shielding in cabinet；Set on the outer wall of described screen cabinet
Have and hold the through hole that described optical fiber passes through.
Preferably, described transient overvoltage monitoring modular includes dual control power supply, isolating transformer, monitoring IED and transient state
Overvoltage recording equipment；
Described dual control power supply is connected with the side of described isolating transformer；
Described monitoring IED and transient overvoltage recording equipment are all connected with the opposite side of described isolating transformer；
It is connected using TCP/IP interface between described monitoring IED and described transient overvoltage recording equipment；
Described transient overvoltage recording equipment and described transient overvoltage sampling unit cable connection.
Preferably, described dual control power supply, transient overvoltage recording equipment, monitoring IED and isolating transformer with to
Under order be arranged in the rack of vertical placement；
It is provided with grounding copper bar in described rack and at its bottom close；
It is provided with terminal block on the side wall obtaining in described rack.
Preferably, the outer wall of described rack and described transient overvoltage recording equipment is rustless steel insulation outer wall；Described every
It is 5000 to 6000V from the voltage of transformator；
The top of described rack is provided with fan；Bottom setting having heaters in described rack.
Preferably, some described transient overvoltage sampling units are separately positioned on described GIS body outer wall and near it
On the internal position of induction electrode.
Preferably, described transient overvoltage sampling unit includes amplifier and the input with described amplifier is connected and is grounded
Insulation hand hole；
Described insulation hand hole is arranged on described GIS body outer wall and on its internal position of induction electrode；
The outfan cable of described amplifier is connected with described transient overvoltage recording equipment.
Preferably, described amplifier include insulating power supply, setting on circuit boards every operational amplifier chip and with described
The peripheral circuit that operation amplifier chip connects；
One end of described insulating power supply is connected with external power source；The other end of described insulating power supply is wired to described electricity
Road plate；
Described amplifier is arranged in metal shielding body.
Preferably, described insulation hand hole includes being arranged on described GIS body outer wall and near its internal induction electrode
Position on hand hole base and described hand hole base engagement use hand hole cover plate and be folded in described hand hole base and handss
Insulation film between blind patch；
The center of described hand hole cover plate is provided with and holds the through hole that cable passes through；
The input cable of described amplifier is connected with described hand hole base through described through hole.
It can be seen from above-mentioned technical scheme that, the invention provides the present invention to provide a kind of extra-high voltage GIS to use distributed temporary
State over-voltage monitoring system, monitoring system includes main control module, some transient overvoltage monitoring modulars and transient overvoltage
Sampling unit；Each transient overvoltage sampling unit is all connected with a transient overvoltage monitoring modular；Whole transient state
Over-voltage monitoring module is connected to main control module；Transient overvoltage sampling unit is arranged on extra-high voltage GIS body.
Monitoring system proposed by the present invention, improves the capacity of resisting disturbance of monitoring system, can efficiently and accurately monitor simultaneously and
The various transient overvoltage waveforms of record GIS device, are conducive to grasping GIS device transient overvoltage wave character and system
Count all kinds of overvoltage levels, be that Insulation Coordination provides reliable and accurate foundation.
With immediate prior art ratio, the present invention provide technical scheme there is following excellent effect：
1st, the present invention improves the capacity of resisting disturbance of monitoring system, can efficiently and accurately monitor simultaneously and record GIS
The various transient overvoltage waveforms of equipment, are conducive to grasping GIS device transient overvoltage wave character and statistics are all kinds of excessively electric
Voltage levels, are that Insulation Coordination provides reliable and accurate foundation.
2nd, the present invention effectively and reliably reads or arranges the parameter of transient voltage monitoring device, receives transient voltage monitoring
The transient voltage data of device monitoring record and browse transient voltage data.
3rd, the present invention improves the interference free performance of amplifier.The high speed that used, wideband operational amplifier are it is ensured that put
Big circuit has enough bandwidth and speed faster, has higher input impedance and less output impedance, Neng Goushi
The now impedance matching with front end sensors and rear end transient overvoltage monitoring device.Operational amplifier and insulating power supply all encapsulate
In the middle of Metal shielding shell, so not only improve the capacity of resisting disturbance of amplifier, also reduce spuious ginseng under high frequency situations
Several impacts to measurement result.
4th, technical scheme provided by the present invention, arranges handss window in GIS device, and handss window sensor is arranged on handss window
On.The advantage of handss window capacitance partial pressure is, capacitance partial pressure circuit has less stray inductance, sensor high frequency itself
Characteristic preferably, can reach 1GHz.
5th, technical scheme provided by the present invention, the structure design of outdoor cabinet can be adjusted to in-cabinet temperature, humidity,
Minimum temperature is made to be maintained at more than -25 DEG C, maximum temperature is less than 55 DEG C, and in cabinet, no condensation and icing, is monitoring device
Suitable running environment is provided.
6th, dual control power supply provided by the present invention is powered, and has alternating current 220V power supply to power, when transformer station has during normal work
When fault occurs alternating current power supply to disconnect, even if be immediately switched to UPS powering it is achieved that in substation fault, also not
The transient overvoltage of GIS can be failed to record.
7th, the isolation voltage 5000V of super isolating transformer provided by the present invention, in addition to having general isolation features,
Also have the ability of anti-common mode and differential mode interference simultaneously concurrently, be prevented effectively from ultra-high voltage transformer station Ground Electric Potential Rise to power supply
Impact.Using super isolating transformer, can preferably suppress the interference from power supply.
8th, technical scheme provided by the present invention, transient overvoltage detection requirement test system has good frequency response
Characteristic and high sampling rate, and being capable of non-volatile recording whole process.Transient overvoltage recording equipment adopts transient voltage ripple
Shape sampling rate self adaptation real-time compression techniques, automatically according to the sampling rate of the frequency adjustment data storage of signal, can
Accurately catch swift waveform, the space of stored waveform occupancy can be substantially reduced again；Sampled voltage catastrophic event start-up technique,
Overvoltage complete process is divided into multiple fragment storages, reduces the storage of unnecessary section, can be quickly found out simultaneously and send out
The position of raw overvoltage.
9th, the isolation voltage of transient overvoltage monitoring system provided by the present invention avoids interfering with each other between passage.System
Powered using super isolating transformer, in addition to having general isolation features, also have anti-common mode and differential mode interference concurrently simultaneously
Ability, is prevented effectively from the impact to power supply for the ultra-high voltage transformer station Ground Electric Potential Rise, and can preferably suppress from electricity
The interference in source.It is to limit sky that power supply between transient overvoltage monitoring system analog circuit and digital circuit adopts insulating power supply
Between electromagnetic wave be directly entered the electromagnetic interference that monitoring device is internally formed, the artificial circuit part peace of overvoltage signal collection plate
Fill shielding case, transient overvoltage recording equipment adopts rustless steel shielding case, outdoor cabinet adopts rustless steel cabinet, internal
Earthing bar is installed, signal cable is adopted Phototube Coupling, all greatly improved this using band screened coaxial cable, order wire
Bright isolation features and capacity of resisting disturbance.
10th, technical scheme provided by the present invention, between transient overvoltage monitoring IED and transient overvoltage recording equipment
The transient overvoltage waveform being arrived using TCP/IP interface, real-time reception transient overvoltage recording apparatus collecting.Monitoring IED
Adopt fiber optic Ethernet and master station computer between, communication protocol meets IEC61850 standard, by the data collecting with
The form of IEC61850 standard interface is supplied to higher level's IEC61850 client control platform software it is achieved that to transient state mistake
The communication standard of voltage recording equipment.
11st, the technical scheme that the present invention provides, is widely used, has significant Social benefit and economic benefit.
Brief description
Fig. 1 is a kind of structural representation with distributed transient overvoltage monitoring system for extra-high voltage GIS of the present invention；
Fig. 2 is the structural representation of the main control module in the monitoring system of the present invention；
Fig. 3 is the structure front schematic view of the transient overvoltage monitoring modular in the monitoring system of the present invention；
Fig. 4 is the structured rear surface schematic diagram of the transient overvoltage monitoring modular in the monitoring system of the present invention；
Fig. 5 be the present invention monitoring system in transient overvoltage sampling unit structural representation.
Wherein, 1- extra-high voltage GIS body, 2- optical fiber switch, 3- main website control computer, 4- optical fiber, 5- screen cabinet,
6- dual control power supply, 7- isolating transformer, 8- monitoring IED, 9- transient overvoltage recording equipment, 10- cable, 11- rack,
12- grounding copper bar, 13- terminal block, 14- fan, 15- heater, 16- induction electrode, 17- amplifier, 18- insulation handss
Hole, 19- hand hole base, 20- hand hole cover plate, 21- insulation film.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
In embodiments of the invention, those of ordinary skill in the art obtained under the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
As shown in figure 1, the present invention provides a kind of extra-high voltage GIS distributed transient overvoltage monitoring system；Including simulation
Main control module, some transient overvoltage monitoring modulars and transient state that channel voltage is the isolation voltage of 2000V are excessively electric
Pressure sampling unit；
Each transient overvoltage sampling unit is all connected with a transient overvoltage monitoring modular；Whole transient overvoltages
Monitoring modular is connected to main control module；
Transient overvoltage sampling unit is arranged on extra-high voltage GIS body 1.
As shown in Fig. 2 main control module includes optical fiber switch 2 and main website control computer 3；
Main website control computer 3 is provided with IEC61850 client control platform software；
Master station computer is communicated with transient overvoltage monitoring modular in optical fiber 4 Ethernet by optical fiber switch 2；And it is logical
Letter agreement meets IEC61850 standard；
Some transient overvoltage monitoring modulars are connected to optical fiber switch 2 with optical fiber 4 respectively.
Optical fiber switch 2 and main website control computer 3 are arranged at shielding in cabinet 5；It is fine that the outer wall of screen cabinet 5 is provided with facial expression
4 through holes passing through.
As shown in Figures 3 and 4, transient overvoltage monitoring modular includes dual control power supply 6, isolating transformer 7, monitoring IED8
With transient overvoltage recording equipment 9；
Dual control power supply 6 is connected with the side of isolating transformer 7；
Monitoring IED8 and transient overvoltage recording equipment 9 are all connected with the opposite side of isolating transformer 7；
It is connected using TCP/IP interface between monitoring IED8 and transient overvoltage recording equipment 9；
Transient overvoltage recording equipment 9 is connected with transient overvoltage sampling unit cable 10.
Dual control power supply 6, transient overvoltage recording equipment 9, monitoring IED8 and isolating transformer 7 are suitable with from top to bottom
Sequence is arranged in the rack 11 of vertical placement；
It is provided with grounding copper bar 12 in rack 11 and at its bottom close；
It is provided with terminal block 13 on the side wall obtaining in rack 11.
The outer wall of rack 11 and transient overvoltage recording equipment 9 is rustless steel insulation outer wall；The electricity of isolating transformer 7
Press as 5000 to 6000V；
The top of rack 11 is provided with fan 14；Bottom setting having heaters 15 in rack 11.
As shown in figure 5, some transient overvoltage sampling units are separately positioned on GIS body 1 outer wall and in it
On the position of induction electrode 16 in portion.
Transient overvoltage sampling unit includes the insulation hand hole that amplifier 17 and the input with amplifier 17 are connected and are grounded
18；
Insulation hand hole 18 is arranged on GIS body 1 outer wall and on its internal position of induction electrode 16；
The outfan cable 10 of amplifier 17 is connected with transient overvoltage recording equipment 9.
Amplifier 17 include insulating power supply, setting on circuit boards every operational amplifier 17 chip and with operation amplifier core
The peripheral circuit that piece connects；
One end of insulating power supply is connected with external power source；The other end of insulating power supply is wired to circuit board；
Amplifier 17 is arranged in metal shielding body.
Insulation hand hole 18 includes being arranged on GIS body 1 outer wall and on its internal position of induction electrode 16
The hand hole cover plate 20 that uses cooperatively with hand hole base 19 of hand hole base 19 and be folded in hand hole base 19 and hand hole cover
Insulation film 21 between plate 20；
The center of hand hole cover plate 20 is provided with and holds the through hole that cable 10 passes through；
Input cable 10 via through holes of amplifier 17 are connected with hand hole base 19.
The present invention provides a kind of application examples of the distributed transient overvoltage monitoring system of extra-high voltage GIS, excessively electric including transient state
Pressure signal sampling device, transient overvoltage monitoring device, main station system and signal cable, communication cable.Each is extra-high
Pressure GIS transformer station, comprises a set of main station system, some transient overvoltage signal sampling devices and transient overvoltage monitoring dress
Put, system adopt Distributed Design, transient overvoltage signal sampling device and transient overvoltage monitoring device be all arranged on by
At measuring point, each monitoring point installs 1 set, is connected with master station computer by fiber optic Ethernet.
(1) transient overvoltage signal sampling device
Transient overvoltage signal sampling device includes handss window sensor and amplifier.Handss window sensor includes faradism
Polymer between pole, handss window cover and induction electrode and handss window cover.Handss window is arranged on GIS device, handss window senses
Device is arranged on handss window.Distribution capacity between GIS bus-bars conductor and induction electrode constitutes the high voltage arm capacitor of capacitive divider
C1, is insulated with polymer between induction electrode and handss window cover, constitutes lumped capacitance, as low-voltage arm electric capacity C2, handss
Window cover plate earthing, forms capacitance partial pressure with this.The advantage of handss window capacitance partial pressure is, capacitance partial pressure circuit has less
Stray inductance, sensor high frequency characteristics itself preferably, can reach 1GHz.
Amplifier includes insulating power supply, operational amplifier chip and its peripheral circuit, Metal shielding shell.Insulating power supply
Isolation voltage is 6000V, is that amplifying circuit is powered, and improves the interference free performance of amplifier.Transient state due to GIS device
Overvoltage signal covers the signal from tens hertz to up to a hundred megahertzs, therefore have selected high speed, wideband operational amplifier,
Ensure that amplifying circuit has enough bandwidth and speed faster.Amplifier has higher input impedance and less output
Impedance, is capable of the impedance matching with front end sensors and rear end transient overvoltage monitoring device.Operational amplifier and every
All it is encapsulated in the middle of Metal shielding shell from power supply, so not only improve the capacity of resisting disturbance of amplifier, also reduce high frequency
In the case of the impact to measurement result for the stray parameter.
(2) outdoor distributed transient overvoltage monitoring device
The change in voltage situation of outdoor distributed transient overvoltage monitoring device real-time monitoring measured point, occurs when there being overvoltage
When, start waveform recording, and Wave data be uploaded to master station computer, using Distributed Design, be arranged on nearby by
Near measuring point, it is connected with master station computer by fiber optic Ethernet.Transient overvoltage monitoring device includes outdoor cabinet, dual control
Power supply, isolating transformer, transient overvoltage recording equipment, monitoring IED.Dual control power supply, isolating transformer, transient state mistake
Voltage recording equipment, monitoring IED are installed in outdoor cabinet.
1) outdoor cabinet：Outdoor cabinet adopts distributed installation, and each monitoring point installs one, using rustless steel double thermal insulation
Structure, configures temperature and humidity controller, installs fan above cabinet, and heater is installed in lower section, can be to in-cabinet temperature, wet
Degree is adjusted, and makes minimum temperature be maintained at more than -25 DEG C, and maximum temperature is less than 55 DEG C, no condensation and icing in cabinet,
There is provided suitable running environment for monitoring device.Special grounding copper bar is set, all devices in cabinet pass through copper cash and connect in cabinet
Ground copper bar connects.
2) dual control power supply：Powered using dual control power supply in cabinet, a road connects transformer station's alternating current 220V power supply, and another road connects
UPS in transformer station.There is alternating current 220V power supply to power during normal work, occur alternating current power supply to disconnect when transformer station is faulty
When, it is immediately switched to UPS and powers, the transient overvoltage of GIS so in substation fault, will not be failed to record.
3) isolating transformer：The output of dual control power supply is connected with isolating transformer, and isolating transformer provides for device in cabinet
Power supply.Isolating transformer adopts super isolating transformer, and the isolation voltage 5000V of super isolating transformer, except having one
As isolation features outside, also have the ability of anti-common mode and differential mode interference simultaneously concurrently, be prevented effectively from ultra-high voltage transformer station ground potential
The impact to power supply for the lifting.Using super isolating transformer, can preferably suppress the interference from power supply.
4) transient overvoltage recording equipment.Transient overvoltage detection requirement test system has good frequency response characteristic
With high sampling rate, and being capable of non-volatile recording whole process.Transient overvoltage recording equipment is adopted using transient voltage waveform
Sample rate adaptation real-time compression techniques, automatically according to the sampling rate of the frequency adjustment data storage of signal, can be accurate
Catch swift waveform, the space of stored waveform occupancy can be substantially reduced again；Sampled voltage catastrophic event start-up technique, incited somebody to action
Voltage complete process is divided into multiple fragment storages, reduces the storage of unnecessary section, can be quickly found out simultaneously and occur
The position of voltage.Algorithm above adopts the hardware of DSP+FPGA to realize.Device has 3 independent mutually isolated adopting
Sample channel module and a transport module composition, improve on the premise of such design is mutually isolated between guarantee passage
The sampling efficiency of device single so that between for multichannel the target of signal contrast be achieved.Transport module is furnished with USB
With two kinds of communication interfaces of TCP/IP, for debugging use, TCP/IP interface is for on-line monitoring use for USB interface.
5) adopt TCP/IP interface between transient overvoltage monitoring IED. monitoring IED and transient overvoltage recording equipment,
The transient overvoltage waveform that real-time reception transient overvoltage recording apparatus collecting arrives.Between monitoring IED and master station computer
Using fiber optic Ethernet, communication protocol meets IEC61850 standard, and the data collecting is connect with IEC61850 standard
The form of mouth is supplied to higher level's IEC61850 client control platform software, to realize to transient overvoltage recording equipment
Communication standard.
(3). main station system
Main station system includes：One shields cabinet, optical fiber switch, an industrial computer and is arranged on soft on industrial computer
Part system.Optical fiber switch and industrial computer are arranged on screen cabinet.IEC61850 client control is provided with industrial computer put down
Platform software, is communicated with transient overvoltage monitoring device by IEC61850 standard interface, for reading or arranging transient state electricity
Press the parameter of monitoring device, receive the transient voltage data of transient voltage monitoring device monitoring record and browse transient voltage
Data.
(4). Anti-interference Design
Transformer station's transient overvoltage process generally along with strong electromagnetic disturbance, need to consider the anti-interference energy of measuring apparatus
Power, and prevent its secondary harassing and wrecking problem to transformer station's other equipment.Environment electromagnetics when ultra-high voltage transformer station normally runs
Interference also can not be ignored, and therefore, transient overvoltage monitoring system must take certain interference protection measure.
1) channel separation
Mutually isolated, isolation voltage 2000V between each analog channel of transient overvoltage monitoring system, it is to avoid between passage mutually
Mutually disturb.
2) isolated from power
System is powered using super isolating transformer, isolation voltage 5000V, in addition to having general isolation features, also same
When have the ability of anti-common mode and differential mode interference concurrently, be prevented effectively from the shadow to power supply for the ultra-high voltage transformer station Ground Electric Potential Rise
Ring.Using super isolating transformer, can preferably suppress the interference from power supply.Transient overvoltage monitoring system is simulated
Power supply between circuit and digital circuit adopts insulating power supply, isolation voltage 6000V.
3) shield and be grounded
It is directly entered the electromagnetic interference that monitoring device is internally formed, the mould of overvoltage signal collection plate for limiting spatial electromagnetic ripple
Intend circuit part and be mounted with shielding case, transient overvoltage recording equipment adopts 19 inches of rustless steel shielding cases, outdoor cabinet
Using rustless steel cabinet, internal earthing bar is installed, signal cable using band screened coaxial cable, order wire adopt photoelectricity every
From.
Above example is only not intended to limit in order to technical scheme to be described, although with reference to above-described embodiment to this
Invention has been described in detail, and those of ordinary skill in the art still can enter to the specific embodiment of the present invention
Row modification or equivalent, and these are without departing from any modification of spirit and scope of the invention or equivalent, it is equal
Within the claims applying for the pending present invention.
Claims (10)
1. a kind of extra-high voltage GIS with distributed transient overvoltage monitoring system it is characterised in that described monitoring system bag
Include analog channel voltage and be the main control module of isolation voltage of 2000V, some transient overvoltage monitoring modulars and temporarily
State overvoltage sampling unit；
Each described transient overvoltage sampling unit is all connected with a described transient overvoltage monitoring modular；Whole institutes
State transient overvoltage monitoring modular and be connected to described main control module；
Described transient overvoltage sampling unit is arranged on extra-high voltage GIS body.
2. the system as claimed in claim 1 is it is characterised in that described main control module includes optical fiber switch and master
Stand control computer；
Described main website control computer is provided with IEC61850 client control platform software；
Described master station computer pass through described optical fiber switch in fiber optic Ethernet with described transient overvoltage monitoring modular
Communication；And communication protocol meets IEC61850 standard；
Some described transient overvoltage monitoring modulars are connected to described optical fiber switch with optical fiber respectively.
3. system as claimed in claim 2 is it is characterised in that described optical fiber switch and main website control computer are equal
It is arranged in screen cabinet；The outer wall of described screen cabinet is provided with and holds the through hole that described optical fiber passes through.
4. the system as claimed in claim 1 is it is characterised in that described transient overvoltage monitoring modular includes dual control electricity
Source, isolating transformer, monitoring IED and transient overvoltage recording equipment；
Described dual control power supply is connected with the side of described isolating transformer；
Described monitoring IED and transient overvoltage recording equipment are all connected with the opposite side of described isolating transformer；
It is connected using TCP/IP interface between described monitoring IED and described transient overvoltage recording equipment；
Described transient overvoltage recording equipment and described transient overvoltage sampling unit cable connection.
5. system as claimed in claim 4 it is characterised in that described dual control power supply, transient overvoltage recording equipment,
Monitoring IED and isolating transformer are arranged in the rack of vertical placement with order from top to bottom；
It is provided with grounding copper bar in described rack and at its bottom close；
It is provided with terminal block on the side wall obtaining in described rack.
6. system as claimed in claim 5 is it is characterised in that described rack and described transient overvoltage recording equipment
Outer wall be rustless steel insulation outer wall；The voltage of described isolating transformer is 5000 to 6000V；
The top of described rack is provided with fan；Bottom setting having heaters in described rack.
7. the system as claimed in claim 1 is it is characterised in that some described transient overvoltage sampling units set respectively
Put on described GIS body outer wall and on its internal position of induction electrode.
8. system as claimed in claim 7 is it is characterised in that described transient overvoltage sampling unit includes amplifier
And the insulation hand hole being connected with the input of described amplifier and being grounded；
Described insulation hand hole is arranged on described GIS body outer wall and on its internal position of induction electrode；
The outfan cable of described amplifier is connected with described transient overvoltage recording equipment.
9. system as claimed in claim 8 is it is characterised in that described amplifier includes insulating power supply, is arranged on electricity
On the plate of road every operational amplifier chip and the peripheral circuit that is connected with described operation amplifier chip；
One end of described insulating power supply is connected with external power source；The other end of described insulating power supply is wired to described electricity
Road plate；
Described amplifier is arranged in metal shielding body.
10. system as claimed in claim 9 is it is characterised in that described insulation hand hole includes being arranged in described GIS
Hand hole base on body outer wall and on its internal position of induction electrode and described hand hole base engagement use
Hand hole cover plate and be folded in the insulation film between described hand hole base and hand hole cover plate；
The center of described hand hole cover plate is provided with and holds the through hole that cable passes through；
The input cable of described amplifier is connected with described hand hole base through described through hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510487119.0A CN106443144A (en) | 2015-08-11 | 2015-08-11 | Distributed transient overvoltage monitoring system for EHV (extra-high voltage) GIS |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510487119.0A CN106443144A (en) | 2015-08-11 | 2015-08-11 | Distributed transient overvoltage monitoring system for EHV (extra-high voltage) GIS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109470914A (en) * | 2018-09-30 | 2019-03-15 | 国电南瑞科技股份有限公司 | A kind of VFTO signal measurement apparatus |
| CN110501619A (en) * | 2019-08-30 | 2019-11-26 | 国网山西省电力公司电力科学研究院 | A kind of high frequency response partial pressure measuring apparatus |
| CN110579689A (en) * | 2019-10-14 | 2019-12-17 | 清华四川能源互联网研究院 | Device and method for accurately positioning fault of high-voltage GIL equipment |
| CN111475922A (en) * | 2020-03-16 | 2020-07-31 | 大唐水电科学技术研究院有限公司 | Power plant booster station main transformer switching-on overvoltage simulation modeling method |
| CN111487460A (en) * | 2020-06-04 | 2020-08-04 | 云南电网有限责任公司电力科学研究院 | Fiber transmission VFTO monitoring system and method for GIS transformer substation |
| CN111830313A (en) * | 2020-07-07 | 2020-10-27 | 国网福建省电力有限公司电力科学研究院 | Transient overvoltage broadband monitoring system for modular multilevel converter |
| CN111856120A (en) * | 2020-06-15 | 2020-10-30 | 中国电力科学研究院有限公司 | Transient ground potential monitoring method and device suitable for transformer substation |
| CN112798853A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN113189386A (en) * | 2021-05-11 | 2021-07-30 | 国网山东省电力公司泰安供电公司 | GIS rapid transient overvoltage optical online monitoring system |
| CN114047374A (en) * | 2022-01-11 | 2022-02-15 | 华北电力大学 | GIS (geographic information system) hand window type VFTO (very fast transient overvoltage) sensing and triggering integrated measuring device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470914A (en) * | 2018-09-30 | 2019-03-15 | 国电南瑞科技股份有限公司 | A kind of VFTO signal measurement apparatus |
| CN110501619A (en) * | 2019-08-30 | 2019-11-26 | 国网山西省电力公司电力科学研究院 | A kind of high frequency response partial pressure measuring apparatus |
| CN110579689A (en) * | 2019-10-14 | 2019-12-17 | 清华四川能源互联网研究院 | Device and method for accurately positioning fault of high-voltage GIL equipment |
| CN111475922A (en) * | 2020-03-16 | 2020-07-31 | 大唐水电科学技术研究院有限公司 | Power plant booster station main transformer switching-on overvoltage simulation modeling method |
| CN111475922B (en) * | 2020-03-16 | 2023-03-28 | 大唐水电科学技术研究院有限公司 | Power plant booster station main transformer switching-on overvoltage simulation modeling method |
| CN111487460A (en) * | 2020-06-04 | 2020-08-04 | 云南电网有限责任公司电力科学研究院 | Fiber transmission VFTO monitoring system and method for GIS transformer substation |
| CN111856120A (en) * | 2020-06-15 | 2020-10-30 | 中国电力科学研究院有限公司 | Transient ground potential monitoring method and device suitable for transformer substation |
| CN111856120B (en) * | 2020-06-15 | 2023-05-16 | 中国电力科学研究院有限公司 | Transient ground potential monitoring method and device suitable for transformer substation |
| CN111830313A (en) * | 2020-07-07 | 2020-10-27 | 国网福建省电力有限公司电力科学研究院 | Transient overvoltage broadband monitoring system for modular multilevel converter |
| CN112798853A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN112798853B (en) * | 2020-12-28 | 2022-05-27 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN113189386A (en) * | 2021-05-11 | 2021-07-30 | 国网山东省电力公司泰安供电公司 | GIS rapid transient overvoltage optical online monitoring system |
| CN114047374A (en) * | 2022-01-11 | 2022-02-15 | 华北电力大学 | GIS (geographic information system) hand window type VFTO (very fast transient overvoltage) sensing and triggering integrated measuring device |
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