CN103675745B - Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment - Google Patents
Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment Download PDFInfo
- Publication number
- CN103675745B CN103675745B CN201310695852.2A CN201310695852A CN103675745B CN 103675745 B CN103675745 B CN 103675745B CN 201310695852 A CN201310695852 A CN 201310695852A CN 103675745 B CN103675745 B CN 103675745B
- Authority
- CN
- China
- Prior art keywords
- phase
- module
- signal
- current
- voltage
- 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.)
- Active
Links
Abstract
The invention discloses a checking system of an on-line monitoring device for a zinc oxide arrester and capacitive equipment. The checking system comprises a genlock module, a control module, a signal generating module and a signal coupling mode, wherein the genlock module generates waveform data according to operating voltage of an electric system, the control module outputs current control commands and phase control commands according to a preset instruction and the waveform data, according to the current control commands and the phase control commands, the signal generating module generates current signals which are synchronous with the frequency of the operating voltage of the electric system and have a certain phase, and the signal coupling module couples the current signals to a current measuring sensor of the on-line monitoring device. In the actual checking process on site, a corresponding parameter value of the on-line monitoring device is firstly read, the checking system then outputs the current signals which are synchronous with the frequency of the operating voltage and have the certain phase and amplitude, at the moment, a displaying value of the on-line monitoring device is read, an error value is obtained through comparison between the corresponding parameter value and the displaying value, and the magnitude of the on-line monitoring device is corrected according to the error value.
Description
Technical field
The application is related to technical field of electric power, more particularly, it relates to a kind of Zinc-Oxide Arrester and capacitive apparatus
The check system of line monitoring device.
Background technology
Power system is one and constitutes bulky systems from links such as generating, transmission of electricity, power transformation, distribution to electricity consumption, in each link,
Between link, the reliability of equipment and operation conditions will directly affect the stable of whole system and safety, also contribute to electric energy simultaneously
Quality and power supply reliability.Zinc-Oxide Arrester is because of its superior nonlinear characteristic and through-current capability. it is widely used in electric power
In system.Operating spark gap because internal wetted or bear for a long time working voltage and overvoltage effect lower occur aging etc. exhausted
Edge defect, all can lead to the resistive component in spark gap ac leakage current to increase, thus accelerated ageing process.Zinc oxide is taken shelter from the thunder
The aging of device is extremely dangerous in power system, such as finds not in time to be overhauled or change, will lead to considerable safety
Accident.
Additionally, in high voltage device of transformer station, the quantity of capacitive apparatus (as transformator, sleeve pipe, ct, cvt etc.) accounts for once
The 40%～50% of equipment, proportion is larger.Although capacitive apparatus insulated deterioration is the process of a gradual change, such as find not in time
And overhaul it is possible to cause sudden accident, cause huge economic loss.
For that purpose it is necessary to be monitored to Zinc-Oxide Arrester and capacitive apparatus insulating properties, mainly pass through at present
Line monitoring device obtains, to operating Zinc-Oxide Arrester and capacitive apparatus, the basic data reflecting its health status.Thus
The metering performance of line monitoring device accurately and reliably seem particularly significant, otherwise will result directly in mistake basic data obtain and
The formulation of error condition maintenance decision, causes heavy economic lossess to system and user.
After on-Line Monitor Device is installed on scene, it is chronically at running status, as shown in Figure 1.C and r series equivalent oxygen
Change zinc spark gap 10 or capacitive apparatus 10.The voltage reference signal of on-Line Monitor Device 20 derives from live voltage transformer 23,
Current signal then derives from the current sensor 21 that Zinc-Oxide Arrester or capacitive apparatus electric current are flow through in monitoring, passes through wire respectively
It is connected with the voltage input end 24 of on-Line Monitor Device 20, current input terminal 22.Because its mode of connection does not allow to change, such as
What realizes its detection error being carried out with on-line checking just to become a difficult problem urgently to be resolved hurrily as the foundation calibrated.
Content of the invention
In view of this, the application provides the check system of a kind of Zinc-Oxide Arrester and capacitive apparatus on-Line Monitor Device,
For realizing carrying out measurement and calibration to the value of Zinc-Oxide Arrester and capacitive apparatus on-Line Monitor Device at the scene.
To achieve these goals it is proposed that scheme as follows:
A kind of check system of the on-Line Monitor Device of Zinc-Oxide Arrester and capacitive apparatus, comprising:
Genlock module, the voltage signal for the working voltage according to power system generates Wave data；
Control module, according to preset instructions and described Wave data output current control command and phase controlling order；
Signal generating module, for predetermined current signal is exported according to described current control order and phase controlling order,
The frequency of described current signal and the Frequency Synchronization of described voltage signal, and there is certain phase contrast；
Wire, for producing additional electrical according to described current signal in the current sensor of described on-Line Monitor Device
Stream signal；
Read the parameter value that described on-Line Monitor Device shows first, then export described current signal, then read described
The show value of on-Line Monitor Device, described parameter value is missed with the measurement of the difference as described on-Line Monitor Device of described parameter value
Difference.
Preferably, described genlock module locks phase module for three-phase synchronous, for the three-phase operation according to power system
The three-phase voltage signal of voltage generates three-phase Wave data.
Preferably, described control module is Multichannel controller module.
Preferably, described signal generating module is that three-phase signal occurs module, for according to described preset instructions and described
Wave data exports three-phase predetermined current signal.
Preferably, also include output protection module, for receiving the current signal of described signal generating module output, and will
Described current signal exports to described signal coupling module.
Preferably, also include:
Conventional control module, for exporting regular control commands to described control module；
Described control module controls described signal generating module to pass through output protection module according to described regular control commands
Output three-phase voltage signal, and the three-phase current signal that phase place is matched with described three-phase voltage signal.
Preferably, also include human-computer interaction device, for exporting described preset instructions to described control module.
Preferably, described human-computer interaction device includes:
Display unit, for showing the parameter of described voltage signal, current signal, described parameter include voltage, total current,
Phase place, current in resistance property, capacity current, capacitance and/or dielectric dissipation factor；
Keyboard, for exporting described preset instructions.
It can be seen from above-mentioned technical scheme that, the on-line monitoring of Zinc-Oxide Arrester disclosed in the present application and capacitive apparatus
The check system of device includes genlock module, control module, signal generating module and signal coupling module, genlock mould
Tuber produces Wave data according to the working voltage of power system, and control module is according to preset instructions and Wave data output current control
System order and phase controlling order, signal generating module is according to current control order and phase controlling order generation and power system
Working voltage Frequency Synchronization and there is the current signal of a phase bit, current signal is coupled to online prison by signal coupling module
Survey in device current metering sensor, in the case of the output of check system no signal current, read on-Line Monitor Device corresponding
Parameter value, then by the current signal of certain amplitude of check system output and working voltage Frequency Synchronization, phase place, calculates both
Theoretical Vector modulation value, now read on-Line Monitor Device show value again, compared by both and draw error amount, reach to oxygen
Change the value calibration of zinc spark gap and capacitive apparatus on-Line Monitor Device.
Brief description
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of application, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the field connection figure of Zinc-Oxide Arrester and capacitive apparatus on-Line Monitor Device；
Fig. 2 is a kind of Zinc-Oxide Arrester disclosed in the embodiment of the present application and capacitive apparatus on-Line Monitor Device check system
Structure chart；
Fig. 3 is showing of Zinc-Oxide Arrester disclosed in the embodiment of the present application and capacitive apparatus on-Line Monitor Device check system
Field wiring diagram；
Fig. 4 is a kind of Zinc-Oxide Arrester disclosed in another embodiment of the application and the verification of capacitive apparatus on-Line Monitor Device
The structure chart of system；
Fig. 5 is the on-Line Monitor Device of a kind of Zinc-Oxide Arrester or capacitive apparatus disclosed in the another embodiment of the application
The structure chart of checking system；
Fig. 6 is a kind of Zinc-Oxide Arrester disclosed in the another embodiment of the application and the verification of capacitive apparatus on-Line Monitor Device
The structure chart of system.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation describes it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of the application protection.
Embodiment one
Fig. 2 is a kind of Zinc-Oxide Arrester disclosed in the embodiment of the present application and capacitive apparatus on-Line Monitor Device check system
Structure chart.
As shown in Fig. 2 check system disclosed in the present embodiment includes genlock module 30, control module 40, signal are sent out
Raw module 50 and wire 60, wherein control module 40 is connected with genlock module 30, signal generating module 50 respectively, signal
Module 50 is occurred also to be connected with wire 60.
The voltage signal that genlock module 30 is used for according to Operation of Electric Systems voltage generates Wave data.Voltage signal
Come from voltage transformer 23, this voltage transformer 23 is used for voltage input end 24 output reference voltage to on-Line Monitor Device
Signal, as shown in Figure 3.
Voltage signal is three-phase voltage signal, and the Wave data that same genlock module generates is three-phase Wave data,
It is additionally operable to complete the foundation of the foundation of the incidence relation of phase place, amplitude and alternate phase relation between live voltage, electric current.
Wave data output current control command that control module 40 generates according to preset instructions and genlock module and
Phase controlling order.
Control module 40 is Multichannel controller module, persistently maintains relation between system power and live voltage, and working as is
Transient state and makes system return stable state after disappearing in system voltage.
Signal generating module 50 is used for according to current control order and phase controlling order output current signal, current signal
Amplitude and reference voltage signal between phase place can preset, the frequency of current signal and working voltage voltage signal
Frequency keep synchronous.
The current signal that wire 60 is used for exporting check system is coupled to on-Line Monitor Device current metering sensor 21
In；The two ends of wire 60 are connected with the current output terminal of signal generating module 50 respectively, form current loop, and current signal is being led
Flow in line 60, this wire 60 passes through the center for the current sensor 21 to on-Line Monitor Device 20 input current signal,
As shown in Figure 3.
During field-checking, first in the case of the output of signal generating module 50 no signal current, read on-line monitoring dress
Put 20 corresponding parametric values, then when signal generating module 50 flows in wire 60 according to the current signal that preset instructions produce
When, read the monitoring result of on-Line Monitor Device 20.Real by comparing both theoretical Vector modulation values and on-Line Monitor Device 20
Survey result, you can obtain the margin of error between the two, this margin of error reflects the detection error of on-Line Monitor Device 20.
If detection error is within the scope of allowable error, illustrate that on-Line Monitor Device is working properly, such as beyond allowed band,
Then need it to be keeped in repair or changes.
It can be seen from above-mentioned technical scheme that, Zinc-Oxide Arrester disclosed in the present embodiment and capacitive apparatus on-line monitoring
The check system of device includes genlock module, control module, signal generating module and signal coupling module, genlock mould
Tuber produces Wave data according to the working voltage of power system, and control module is according to preset instructions and Wave data output current control
System order and phase controlling order, signal generating module is according to current control order and phase controlling order generation and power system
The synchronous current signal of working voltage signal, current signal is coupled to on-Line Monitor Device current measurement by signal coupling module
Sensor, in the case of the output of check system no signal current, reads on-Line Monitor Device corresponding parametric values, then works as verification
When system is according to preset instructions output current signal, read the monitoring result of on-Line Monitor Device.By comparing both theoretical arrows
Amount composite value and on-Line Monitor Device measured result, you can obtain the margin of error between the two, this margin of error reflects online
The detection error of monitoring device.
Embodiment two
Fig. 4 is the school of a kind of Zinc-Oxide Arrester and capacitive apparatus on-Line Monitor Device disclosed in another embodiment of the application
The structure chart of check system.
As shown in figure 4, the present embodiment is to be additionally arranged output protection module 70, output protection on the basis of a upper embodiment
Module 70 is arranged between signal generating module 50 and wire 60, is connected with signal generating module 50, wire 60 respectively.
When being verified to on-Line Monitor Device by this check system, power system is possible to can be because some reasons
As thunderbolt or fault etc. may produce surge on spark gap, and then surge is exported to this check system by wire 60, from
And danger may be caused to equipment or personnel, the output protection module 70 therefore passing through to set up is completely cut off to surge, right with this
System and personnel carry out necessary protection.
Embodiment three
Fig. 5 is the on-Line Monitor Device of a kind of Zinc-Oxide Arrester or capacitive apparatus disclosed in the another embodiment of the application
The structure chart of check system.
As shown in figure 5, check system disclosed in the present embodiment is to be additionally arranged conventional control on the basis of a upper embodiment
Module 80, conventional control module 80 is connected with control module 40.
Conventional control module 80 is used for exporting regular control commands to control module 40, realizes the school under laboratory condition
Test, by control signal occur module export corresponding voltage signal, full current signal, phase signal (in given voltage signal,
On the premise of current signal and voltage current phase angle, remaining parameter for example current in resistance property value, capacity current value, dielectric loss because
Numerical value, capacitance value etc. all can uniquely determine) in by school on-Line Monitor Device, thus realizing the examination to its metering performance.
Laboratory verifying work pattern is mainly using conventional verification control module, multichannel High-Speed Hardware control logic, many
There is module and output protection module in channel signal.
During using laboratory verifying work pattern, conventional verification control module takes charge of the explanation the control instruction of control software,
Complete a, b, c three-phase voltage and electric current:
1) Wave data synthesis；
2) voltage, the switching of electric current necessary range；
3) voltage and current phase incidence relation are set up；
4) da routine start and stop instruction and multichannel High-Speed Hardware control logic conventional operating mode control；
5) conventional check system linearly revises work.
Multichannel High-Speed Hardware control logic mainly completes the realization of da start and stop instruction by hardware, and High-speed Control logic is same
When accept the instruction of conventional correction verification module, run on conventional verification control model, with complete the precise synchronization between multichannel and
The maintenance of synchronized relation.
During system starts, accept the conventional control instruction of systems soft ware, particularly a, b, c three-phase electricity piezoelectricity first
Stream needs the corresponding load module showing, and the load module showing can be r, c parallel model.
Conventional control module 80 explains control instruction, carries out output range switching, and completes Wave data synthesis, and arrangement is logical
Road da process control logic, completes the foundation of the incidence relation of phase place between voltage, electric current, amplitude and alternate phase in the process
The foundation of position incidence relation.
Embodiment five
Fig. 6 is a kind of Zinc-Oxide Arrester disclosed in the another embodiment of the application and the verification of capacitive apparatus on-Line Monitor Device
The structure chart of system.
As shown in fig. 6, check system disclosed in the present embodiment is to be additionally arranged man-machine interaction on the basis of a upper embodiment
Module 90, human-computer interaction module 90 is connected with control module 40.
Human-computer interaction module 90 includes display unit 91 and keyboard 92, under conventional correction verification module mode of operation, that is, tests
Room verifying work pattern, display unit 91 can show the system output voltage, the total current value of current signal, capacity current
The parameters such as value, current in resistance property value, phase angle.
Under genlock module mode of operation, i.e. field-checking mode of operation, display unit 91 can pass through keyboard 92
Input, by the initial parameter value of school on-Line Monitor Device, is joined including voltage, total current, current in resistance property, capacity current, phase place etc.
Number.Secondly, display unit 91 passes through keyboard 92 and presets output total current, current in resistance property, capacity current, and with voltage signal
The parameters such as phase place.Again, the parameter that display unit 91 can show also includes external reference voltage amplitude, both vectors aforementioned close
One-tenth value, i.e. total current, current in resistance property, capacity current, phase angle, dielectric dissipation factor value etc..
Keyboard 92 accordingly arrange parameter can carry out input setting to human-computer interaction module 90, to realize to distinct device
Or the verification of difference calibration point.
Last in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant meaning
Covering comprising of nonexcludability, so that including a series of process of key elements, method, article or equipment not only include that
A little key elements, but also include other key elements being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element being limited by sentence "including a ...", does not arrange
Remove and also there is other identical element in the process including described key element, method, article or equipment.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the application.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized in the case of without departing from spirit herein or scope in other embodiments.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (6)
1. a kind of check system of the on-Line Monitor Device of Zinc-Oxide Arrester and capacitive apparatus is it is characterised in that include:
Genlock module, the voltage signal for the working voltage according to power system generates Wave data；
Control module, according to preset instructions and described Wave data output current control command and phase controlling order；Described control
Molding block is Multichannel controller module；
Signal generating module, for predetermined current signal is exported according to described current control order and phase controlling order, described
The frequency of predetermined current signal and the Frequency Synchronization of described voltage signal, and there is certain phase contrast；
Wire, for producing additional electrical according to described predetermined current signal in the current sensor of described on-Line Monitor Device
Stream signal；
Read the parameter value that described on-Line Monitor Device shows first, then output current signal, then read described on-line monitoring
The difference of the show value of device, described show value and described parameter value is the measurement error of described on-Line Monitor Device.
2. check system as claimed in claim 1 is it is characterised in that described genlock module locks phase mould for three-phase synchronous
Block, the three-phase voltage signal for the three-phase operation voltage according to power system generates three-phase Wave data.
3. check system as claimed in claim 1 is it is characterised in that there is mould for three-phase signal in described signal generating module
Block, for exporting three-phase predetermined current signal according to described preset instructions and described Wave data.
4. the check system as described in any one of claims 1 to 3 is it is characterised in that also include:
Conventional control module, for exporting regular control commands to described control module；
Described control module controls described signal generating module to export by output protection module according to described regular control commands
Three-phase voltage signal, and the three-phase current signal that phase place is matched with described three-phase voltage signal.
5. check system as claimed in claim 4 is it is characterised in that also include human-computer interaction device, for described control
Module exports described preset instructions.
6. check system as claimed in claim 5 is it is characterised in that described human-computer interaction device includes:
Display unit, for showing the parameter of described voltage signal, current signal, described parameter includes voltage, total current, phase
Position, current in resistance property, capacity current, capacitance and/or dielectric dissipation factor；
Keyboard, for exporting described preset instructions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310695852.2A CN103675745B (en) | 2013-12-17 | 2013-12-17 | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310695852.2A CN103675745B (en) | 2013-12-17 | 2013-12-17 | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103675745A CN103675745A (en) | 2014-03-26 |
| CN103675745B true CN103675745B (en) | 2017-01-25 |
Family
ID=50313890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310695852.2A Active CN103675745B (en) | 2013-12-17 | 2013-12-17 | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103675745B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062618B (en) * | 2014-07-09 | 2016-08-17 | 国家电网公司 | A kind of capacitive apparatus on-Line Monitor Device method of calibration of dual signal source |
| CN105785300B (en) * | 2016-03-04 | 2019-03-15 | 福建和盛高科技产业有限公司 | Distributed capacitive apparatus on-line monitoring calibration equipment and the on-site calibrating method based on the device |
| CN106443537A (en) * | 2016-04-26 | 2017-02-22 | 中国电力科学研究院 | Calibration method for online capacitive equipment insulation parameter monitoring device and calibration equipment |
| CN106443546A (en) * | 2016-10-19 | 2017-02-22 | 中国计量大学 | Wireless calibration method and system for capacitive equipment insulation performance online monitoring device |
| CN107797007B (en) * | 2017-11-16 | 2023-12-15 | 国家电网公司 | Verification system and verification method for on-site capacitive equipment on-line monitoring device |
| CN110441722B (en) * | 2019-08-22 | 2022-06-10 | 华北电力科学研究院有限责任公司 | Method, device and system for checking dielectric loss tester |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE504416C2 (en) * | 1995-10-27 | 1997-02-03 | Sydkraft Ab | Control measurement system for control measurement of energy measurement systems |
| CN101299062A (en) * | 2008-07-01 | 2008-11-05 | 国网武汉高压研究院 | Method and device for checking zinc oxide lightning arrester block property current tester |
| CN201289525Y (en) * | 2008-11-07 | 2009-08-12 | 国网武汉高压研究院 | Checkout device for zinc oxide lightning arrester tester |
| CN102062846A (en) * | 2009-11-14 | 2011-05-18 | 甘肃电力科学研究院 | Method and device for correcting online tester of MOA leakage current |
| CN201876537U (en) * | 2010-11-19 | 2011-06-22 | 山东电力集团公司济宁供电公司 | Detector for online arrester monitoring device |
| US8443647B1 (en) * | 2008-10-09 | 2013-05-21 | Southern Illinois University | Analyte multi-sensor for the detection and identification of analyte and a method of using the same |
-
2013
- 2013-12-17 CN CN201310695852.2A patent/CN103675745B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE504416C2 (en) * | 1995-10-27 | 1997-02-03 | Sydkraft Ab | Control measurement system for control measurement of energy measurement systems |
| CN101299062A (en) * | 2008-07-01 | 2008-11-05 | 国网武汉高压研究院 | Method and device for checking zinc oxide lightning arrester block property current tester |
| US8443647B1 (en) * | 2008-10-09 | 2013-05-21 | Southern Illinois University | Analyte multi-sensor for the detection and identification of analyte and a method of using the same |
| CN201289525Y (en) * | 2008-11-07 | 2009-08-12 | 国网武汉高压研究院 | Checkout device for zinc oxide lightning arrester tester |
| CN102062846A (en) * | 2009-11-14 | 2011-05-18 | 甘肃电力科学研究院 | Method and device for correcting online tester of MOA leakage current |
| CN201876537U (en) * | 2010-11-19 | 2011-06-22 | 山东电力集团公司济宁供电公司 | Detector for online arrester monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103675745A (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103675745B (en) | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment | |
| CN103344936B (en) | Method for fault simulation test of capacitor voltage transformer | |
| CN103454580B (en) | A kind of circuit-breaker switching on-off coil characteristics proving installation | |
| CN103323751B (en) | A kind of high pressure stub cable insulation terminal local discharge test device and using method | |
| CN101470154A (en) | Pressure-resistant test system | |
| CN105548661B (en) | A kind of monitoring method of extra-high voltage DC transmission system DC line voltage distribution fluctuation | |
| CN105223530A (en) | High frequency partial discharge detector verification system and calibration method thereof | |
| CN103809010B (en) | For determining the voltage of every phase and the device and method of power of middle-voltage network | |
| CN205103389U (en) | High frequency partial discharge detector verification system | |
| CN109884439B (en) | Black-start test system and method for power system | |
| CN105823947A (en) | High voltage direct current protection system field calibration method and device | |
| CN109061276A (en) | A kind of isolated neutral system capacitance current test device and its test method | |
| CN202141752U (en) | Online monitoring device for metal zinc oxide lightning arrester | |
| CN206209088U (en) | A kind of zinc oxide arrester tester calibrating installation | |
| CN104007354A (en) | Whole-group test circuit and method for 10 kV zinc oxide lightning arrester and cable | |
| CN109286178A (en) | Power distribution network adaptive Current Protection setting method containing inverse distributed power | |
| CN206387901U (en) | CVT error in dipping anomaly assessment systems based on capacitive earth current | |
| CN103560484A (en) | Multipoint ground-connection current control device for three current transformers to monitor transformer clamping parts in online mode | |
| CN101726674B (en) | Method for on-line assessment of insulation on-line monitoring system of substation | |
| CN203745631U (en) | Verifying system for on-line monitoring device of lightning arrester | |
| CN203630208U (en) | Double-current-transformer online monitoring transformer clamp multipoint grounding current control device | |
| CN208689105U (en) | A kind of isolated neutral system capacitance current test device | |
| CN103558451B (en) | Double-current mutual inductor on-line monitoring multipoint earthing of clamping piece of transformer current control device | |
| CN103560499B (en) | The control method of the lower multipoint earthing of clamping piece of transformer electric current of three current transformer monitorings | |
| CN209446733U (en) | Convenient for the high-voltage circuitbreaker automatic detection device of wiring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161223 Address after: Hangzhou City, Zhejiang province 310014 City Zhaohui village eight District No. 1, Huadian Applicant after: Technology Service Center of Zhejiang Electric Power Testing & Research Institute Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Power Networks Co Applicant before: Electric Power Research Institute of State Grid Zhejiang Electric Power Company |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |