CN108872843A - A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature - Google Patents
A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature Download PDFInfo
- Publication number
- CN108872843A CN108872843A CN201810615120.0A CN201810615120A CN108872843A CN 108872843 A CN108872843 A CN 108872843A CN 201810615120 A CN201810615120 A CN 201810615120A CN 108872843 A CN108872843 A CN 108872843A
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- pole
- mounted circuit
- protection
- recording instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Breakers (AREA)
Abstract
The present invention provides a kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature, including step in detail below, and the connection of power circuit breaker, current adjusting system, pole-mounted circuit breaker and electrographic recording instrument is completed by conducting wire；According to measurement needs, measurement wiring is completed；Set the protection delay definite value and protection seting value of pole-mounted circuit breaker；According to the trip coil off and on operation for carry out the measurement of pole-mounted circuit breaker fast tripping protection or carrying out the difference of pole-mounted circuit breaker overcurrent protection measurement and carry out pole-mounted circuit breaker；Open electrographic recording instrument；The calculating of protection feature is carried out according to the waveform of electrographic recording instrument record, to complete one or two fusions measurement of pole-mounted circuit breaker protection feature.Only by electrographic recording instrument electric current and voltage signal, by simply judging and calculating you can get it protection feature parameter, it more can really reflect the Global Macros characteristic of pole-mounted circuit breaker.
Description
Technical field
The present invention relates to the fields of measurement of pole-mounted circuit breaker protection feature, specially a kind of 10kV pole-mounted circuit breaker protection is special
One or two fusion measurement methods of property.
Background technique
The defencive function of 10kV pole-mounted circuit breaker is mainly fast tripping protection and overcurrent protection etc., the main portion of pole-mounted circuit breaker
Part includes mutual inductor, buckle releaser, operating mechanism and arc-chutes etc., to check whether each component of pole-mounted circuit breaker can be according to guarantor
Shield requires correct movement, electric current and time when needing precise measurement protection act.
Summary of the invention
To solve the above problems, providing a kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature, no
The signal port for needing to access pole-mounted circuit breaker protection location does not need the action signal of acquisition protection location, only passes through oscillography
Recorder electric current and voltage signal more can really reflect column by simply judging and calculating you can get it protection feature parameter
The Global Macros characteristic of upper breaker.
Technical solution of the present invention：
A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature, including step in detail below,
The connection of power circuit breaker, current adjusting system, pole-mounted circuit breaker and electrographic recording instrument, column are completed by conducting wire
Upper breaker is in "on" position, and pole-mounted circuit breaker three-phase enter line side accesses current adjusting system output end, and pole-mounted circuit breaker goes out
Line side short circuit grounding；
According to measurement needs, when carrying out the measurement of pole-mounted circuit breaker fast tripping protection by current adjusting system and pole-mounted circuit breaker
It is connected on the electric current binding post of electrographic recording instrument on the conducting wire being connected by current coil probe, is popped one's head in by voltage wire clamp
It is connected on the voltage link column of electrographic recording instrument；When carrying out pole-mounted circuit breaker overcurrent protection measurement only by current regulation system
It is connected on the electric current binding post of electrographic recording instrument on the conducting wire that system is connected with pole-mounted circuit breaker by current coil probe；It is complete
At measurement wiring；
Set the protection delay definite value and protection seting value of pole-mounted circuit breaker；
According to carry out the measurement of pole-mounted circuit breaker fast tripping protection or carry out pole-mounted circuit breaker overcurrent protection measurement difference and into
The trip coil off and on of row pole-mounted circuit breaker operates；
Open electrographic recording instrument, setting current probe parameter, voltage probe parameter, record duration parameters, sampling rate, storage
Deposit filename；
The calculating that protection feature is carried out according to the waveform of electrographic recording instrument record, to complete pole-mounted circuit breaker protection feature
One or two fusions measurement.
The detailed process of pole-mounted circuit breaker fast tripping protection measurement is,
Pole-mounted circuit breaker is in "on" position, pole-mounted circuit breaker protection delay definite value is set as 0s, protection seting is arranged
Value Isi。
Electrographic recording instrument is opened, setting current probe parameter is 10A:1V, voltage probe parameter are 1:1, record duration ginseng
Number 120s, sampling rate 200kS/s, store files name；
It opens electrographic recording instrument and acquires function, be also turned on power circuit breaker Q, make current adjusting system by the speed of 20A/s
Rate is gradually increased electric current, until pole-mounted circuit breaker movement disconnects, closes the acquisition of electrographic recording instrument；
Electrographic recording instrument acquires tsFor protection act start time, tcFor protection act finish time, A opens for protection act
The peak-to-peak value of beginning moment previous cycle；
The voltage change ratio of i such as formula (1) at the time of at sample rate 200kS/s,
ΔV(ti)=[V (ti)-V(ti-0.005ms)]/0.005ms (1)
In formula, V (ti) it is moment tiVoltage value.
Judge protection act start time tsFormula, such as formula (2),
if ΔV(ti) > Δ V (ti-20ms)×5
then ti=ts (2)
Current effective value when protection act calculates
Fetch protection movement start time tsThe peak-to-peak value A calculating current virtual value of previous cycle, avoids integral calculation, mentions
High calculating speed.
The calculating of peak-to-peak value A such as formula (3)
A=Vmax-Vmin (3)
In formula：
Vmax=max (V (ts),V(ts-dt),V(ts-2dt),…,V(ts-20ms))
Vmin=min (V (ts),V(ts-dt),V(ts-2dt),…,V(ts-20ms))
Dt is time interval, at sample rate 200kS/s, dt=0.005ms.
Current effective value I when protection actcSuch as formula (4)
Ic=A/1.4142 (4).
The detailed process of pole-mounted circuit breaker overcurrent protection measurement is,
T is set by pole-mounted circuit breaker overcurrent protection delay definite valuesi, overcurrent protection setting valve I ' is setsi；
Pole-mounted circuit breaker trip coil is disconnected, circuit breaker Q is powered on, adjusting current adjusting system reaches electric current
Preset value I 'si, disconnect power circuit breaker Q；
Electrographic recording instrument is opened, current probe parameter 10A is set:1V, voltage probe parameter 1:1, duration parameters t is recordedsi+
60s, sampling rate 200kS/s, store files name；
Pole-mounted circuit breaker trip coil is connected, electrographic recording instrument is opened and acquires function, be also turned on power circuit breaker
Q closes the acquisition of electrographic recording instrument until pole-mounted circuit breaker movement disconnects；
The pole-mounted circuit breaker protection act finish time t of electrographic recording instrument acquisitionc, apply electric current start time t0；
The delay duration Δ t of Δ t overcurrent protection such as formula (5)
Δ t=tc-t0 (5)
In formula, tcFor pole-mounted circuit breaker protection act finish time, t0To apply electric current start time.
The electrographic recording instrument uses Yokogawa DL850 electrographic recording instrument.
The beneficial effects of the invention are as follows：Current adjusting system is accessed from the primary side of pole-mounted circuit breaker, simulates short trouble
Electric current measures and records electric current and voltage waveform using Yokogawa DL850 electrographic recording instrument high speed, is obtained on column by Wave data
The protection feature of breaker.The present invention does not need the signal port of access pole-mounted circuit breaker protection location, does not need acquisition protection
The action signal of unit, only by electrographic recording instrument electric current and voltage signal, by simply judging and calculating you can get it guarantor
Characterisitic parameter is protected, more can really reflect the Global Macros characteristic of pole-mounted circuit breaker.
Detailed description of the invention
Fig. 1 is that pole-mounted circuit breaker fast tripping protection of the present invention measures wiring construction schematic diagram；
Fig. 2 is that pole-mounted circuit breaker overcurrent protection of the present invention measures wiring construction schematic diagram；
Fig. 3 is pole-mounted circuit breaker fast tripping protection measured waveform figure of the present invention；
Fig. 4 is the partial enlargement diagram of Fig. 3 of the present invention；
Fig. 5 is pole-mounted circuit breaker overcurrent protection measured waveform figure of the present invention.
Figure label respectively indicates：1-power circuit breaker, 2-current adjusting systems, 3-pole-mounted circuit breakers, 4-oscillographys
Recorder, 5-electric current binding posts, 6-voltage link columns, 7-current coils probe, 8-voltage wire clamps probe.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1 and Fig. 2, technical solution of the present invention：
A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature, including step in detail below,
The company of power circuit breaker 1, current adjusting system 2, pole-mounted circuit breaker 3 and electrographic recording instrument 4 is completed by conducting wire
It connects, pole-mounted circuit breaker 3 is in "on" position, and 3 three-phase enter line side of pole-mounted circuit breaker accesses 2 output end of current adjusting system, on column
3 outgoing line side short circuit grounding of breaker；
According to measurement needs, when carrying out the measurement of pole-mounted circuit breaker fast tripping protection by open circuit in current adjusting system 2 and column
It is connected on the electric current binding post 5 of electrographic recording instrument 4 on the conducting wire that device 3 is connected by current coil probe 7, passes through pressure-wire
Folder probe 8 is connected on the voltage link column 6 of electrographic recording instrument 4；Only will when carrying out pole-mounted circuit breaker overcurrent protection measurement
Electrographic recording instrument 4 is connected to by current coil probe 7 on the conducting wire that current adjusting system 2 is connected with pole-mounted circuit breaker 3
On electric current binding post 5；Complete measurement wiring；
Set the protection delay definite value and protection seting value of pole-mounted circuit breaker 3；
According to carry out the measurement of pole-mounted circuit breaker fast tripping protection or carry out pole-mounted circuit breaker overcurrent protection measurement difference and into
The trip coil off and on of row pole-mounted circuit breaker operates；
Open electrographic recording instrument, setting current probe parameter, voltage probe parameter, record duration parameters, sampling rate, storage
Deposit filename；
The calculating that protection feature is carried out according to the waveform of electrographic recording instrument record, to complete pole-mounted circuit breaker protection feature
One or two fusions measurement.
The detailed process of pole-mounted circuit breaker fast tripping protection measurement as shown in Figure 1, Figure 3 and Figure 4 is,
Pole-mounted circuit breaker is in "on" position, pole-mounted circuit breaker protection delay definite value is set as 0s, protection seting is arranged
Value Isi。
Electrographic recording instrument is opened, setting current probe parameter is 10A:1V, voltage probe parameter are 1:1, record duration ginseng
Number 120s, sampling rate 200kS/s, store files name；
It opens electrographic recording instrument and acquires function, be also turned on power circuit breaker Q, make current adjusting system by the speed of 20A/s
Rate is gradually increased electric current, until pole-mounted circuit breaker movement disconnects, closes the acquisition of electrographic recording instrument；
Electrographic recording instrument acquires tsFor protection act start time, tcFor protection act finish time, A opens for protection act
The peak-to-peak value of beginning moment previous cycle；
The voltage change ratio of i such as formula (1) at the time of at sample rate 200kS/s,
ΔV(ti)=[V (ti)-V(ti-0.005ms)]/0.005ms (1)
In formula, V (ti) it is moment tiVoltage value.
Judge protection act start time tsFormula, such as formula (2),
if ΔV(ti) > Δ V (ti-20ms)×5
then ti=ts (2)
Current effective value when protection act calculates
Fetch protection movement start time tsThe peak-to-peak value A calculating current virtual value of previous cycle, avoids integral calculation, mentions
High calculating speed.
The calculating of peak-to-peak value A such as formula (3)
A=Vmax-Vmin (3)
In formula：
Vmax=max (V (ts),V(ts-dt),V(ts-2dt),…,V(ts-20ms))
Vmin=min (V (ts),V(ts-dt),V(ts-2dt),…,V(ts-20ms))
Dt is time interval, at sample rate 200kS/s, dt=0.005ms.
Current effective value I when protection actcSuch as formula (4)
Ic=A/1.4142 (4).
If the detailed process of Fig. 2 and Fig. 5 pole-mounted circuit breaker overcurrent protection measurement is,
T is set by pole-mounted circuit breaker overcurrent protection delay definite valuesi, overcurrent protection setting valve I ' is setsi；
Pole-mounted circuit breaker trip coil is disconnected, circuit breaker Q is powered on, adjusting current adjusting system reaches electric current
Preset value I 'si, disconnect power circuit breaker Q；
Electrographic recording instrument is opened, current probe parameter 10A is set:1V, voltage probe parameter 1:1, duration parameters t is recordedsi+
60s, sampling rate 200kS/s, store files name；
Pole-mounted circuit breaker trip coil is connected, electrographic recording instrument is opened and acquires function, be also turned on power circuit breaker
Q closes the acquisition of electrographic recording instrument until pole-mounted circuit breaker movement disconnects；
The pole-mounted circuit breaker protection act finish time t of electrographic recording instrument acquisitionc, apply electric current start time t0；
The delay duration Δ t of Δ t overcurrent protection such as formula (5)
Δ t=tc-t0 (5)
In formula, tcFor pole-mounted circuit breaker protection act finish time, t0To apply electric current start time.
The present invention accesses current adjusting system from the primary side of pole-mounted circuit breaker, simulates short-circuit current, utilizes Yokogawa
DL850 electrographic recording instrument high speed measures and records electric current and voltage waveform, obtains the protection of pole-mounted circuit breaker by Wave data
Characteristic.The present invention does not need the signal port of access pole-mounted circuit breaker protection location, does not need the movement letter of acquisition protection location
Number, only by electrographic recording instrument electric current and voltage signal, by simply judging and calculating you can get it protection feature parameter, more
It can really reflect the Global Macros characteristic of pole-mounted circuit breaker.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature, it is characterised in that：Including in detail below
Step,
The connection of power circuit breaker, current adjusting system, pole-mounted circuit breaker and electrographic recording instrument is completed by conducting wire, is broken on column
Road device is in "on" position, and pole-mounted circuit breaker three-phase enter line side accesses current adjusting system output end, pole-mounted circuit breaker outgoing line side
Short circuit grounding；
According to measurement needs, current adjusting system is connected with pole-mounted circuit breaker when carrying out the measurement of pole-mounted circuit breaker fast tripping protection
It is connected on the electric current binding post of electrographic recording instrument on the conducting wire connect by current coil probe, is popped one's head in and connected by voltage wire clamp
Onto the voltage link column of electrographic recording instrument；Carry out pole-mounted circuit breaker overcurrent protection measurement when only by current adjusting system with
It is connected on the electric current binding post of electrographic recording instrument on the conducting wire that pole-mounted circuit breaker is connected by current coil probe；It completes to survey
Measure wiring；
Set the protection delay definite value and protection seting value of pole-mounted circuit breaker；
Column is carried out according to carrying out the measurement of pole-mounted circuit breaker fast tripping protection or carrying out the difference of pole-mounted circuit breaker overcurrent protection measurement
The trip coil off and on of upper breaker operates；
Open electrographic recording instrument, setting current probe parameter, voltage probe parameter, record duration parameters, sampling rate, storage text
Part name；
The calculating that protection feature is carried out according to the waveform of electrographic recording instrument record, to complete the one of pole-mounted circuit breaker protection feature
Secondary fusion measurement.
2. a kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature according to claim 1, special
Sign is：The detailed process of pole-mounted circuit breaker fast tripping protection measurement is,
It protects delay definite value to be set as 0s pole-mounted circuit breaker, protection seting value I is setsi。
Electrographic recording instrument is opened, setting current probe parameter is 10A:1V, voltage probe parameter are 1:1, duration parameters are recorded
120s, sampling rate 200kS/s, store files name；
Open electrographic recording instrument acquire function, be also turned on power circuit breaker Q, make current adjusting system by 20A/s rate by
Cumulative high current closes the acquisition of electrographic recording instrument until pole-mounted circuit breaker movement disconnects；
Electrographic recording instrument acquires tsFor protection act start time, tcFor protection act finish time, when A starts for protection act
Carve the peak-to-peak value of previous cycle；
The voltage change ratio of i such as formula (1) at the time of at sample rate 200kS/s,
ΔV(ti)=[V (ti)-V(ti-0.005ms)]/0.005ms (1)
In formula, V (ti) it is moment tiVoltage value.
Judge protection act start time tsFormula, such as formula (2),
if ΔV(ti) > Δ V (ti-20ms)×5
then ti=ts (2)
Current effective value when protection act calculates
Fetch protection movement start time tsThe peak-to-peak value A calculating current virtual value of previous cycle avoids integral calculation, improves meter
Calculate speed.
The calculating of peak-to-peak value A such as formula (3)
A=Vmax-Vmin (3)
In formula：
Vmax=max (V (ts),V(ts-dt),V(ts-2dt),…,V(ts-20ms))
Vmin=min (V (ts),V(ts-dt),V(ts-2dt),…,V(ts-20ms))
Dt is time interval, at sample rate 200kS/s, dt=0.005ms.
Current effective value I when protection actcSuch as formula (4)
Ic=A/1.4142 (4).
3. a kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature according to claim 1, special
Sign is：The detailed process of pole-mounted circuit breaker overcurrent protection measurement is,
T is set by pole-mounted circuit breaker overcurrent protection delay definite valuesi, overcurrent protection setting valve I ' is setsi；
Pole-mounted circuit breaker trip coil is disconnected, circuit breaker Q is powered on, adjusting current adjusting system makes electric current reach default
Value I 'si, disconnect power circuit breaker Q；
Electrographic recording instrument is opened, current probe parameter 10A is set:1V, voltage probe parameter 1:1, duration parameters t is recordedsi+60s、
Sampling rate 200kS/s, store files name；
Pole-mounted circuit breaker trip coil is connected, electrographic recording instrument is opened and acquires function, be also turned on power circuit breaker Q, directly
It acts and disconnects to pole-mounted circuit breaker, close the acquisition of electrographic recording instrument；
The pole-mounted circuit breaker protection act finish time t of electrographic recording instrument acquisitionc, apply electric current start time t0；
The delay duration Δ t of Δ t overcurrent protection such as formula (5)
Δ t=tc-t0 (5)
In formula, tcFor pole-mounted circuit breaker protection act finish time, t0To apply electric current start time.
4. a kind of one or two fusion measurement sides of 10kV pole-mounted circuit breaker protection feature according to claim 1 to 3
Method, it is characterised in that：The electrographic recording instrument uses Yokogawa DL850 electrographic recording instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615120.0A CN108872843B (en) | 2018-06-14 | 2018-06-14 | A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615120.0A CN108872843B (en) | 2018-06-14 | 2018-06-14 | A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108872843A true CN108872843A (en) | 2018-11-23 |
| CN108872843B CN108872843B (en) | 2019-09-27 |
Family
ID=64339022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810615120.0A Active CN108872843B (en) | 2018-06-14 | 2018-06-14 | A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108872843B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133489A (en) * | 2019-04-26 | 2019-08-16 | 国网湖北省电力有限公司电力科学研究院 | The simulated failure applying method of breaker singlephase earth fault on one or two fusion serial columns |
| CN111707856A (en) * | 2020-06-22 | 2020-09-25 | 昆明理工大学 | Power system fault current measuring method designed by utilizing waveform superposition principle |
| CN112230161A (en) * | 2020-09-28 | 2021-01-15 | 国网湖北省电力有限公司电力科学研究院 | Detection method for single-phase earth fault line selection function |
| CN112578310A (en) * | 2020-11-12 | 2021-03-30 | 国网湖北省电力有限公司电力科学研究院 | Detection method for single-phase grounding line selection tripping function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201893540U (en) * | 2010-11-26 | 2011-07-06 | 南宁华供电力科技有限公司 | Intelligent radio network dispatching digital-type boundary controller complete equipment |
| CN103116125A (en) * | 2012-12-31 | 2013-05-22 | 施耐德电气华电开关(厦门)有限公司 | Test loop for non-sustained disruptive discharge (NSDD) test of vacuum circuit breaker |
| CN206638769U (en) * | 2017-02-22 | 2017-11-14 | 西安前进电器实业有限公司 | A kind of pole-mounted circuit breaker failure detector |
-
2018
- 2018-06-14 CN CN201810615120.0A patent/CN108872843B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201893540U (en) * | 2010-11-26 | 2011-07-06 | 南宁华供电力科技有限公司 | Intelligent radio network dispatching digital-type boundary controller complete equipment |
| CN103116125A (en) * | 2012-12-31 | 2013-05-22 | 施耐德电气华电开关(厦门)有限公司 | Test loop for non-sustained disruptive discharge (NSDD) test of vacuum circuit breaker |
| CN206638769U (en) * | 2017-02-22 | 2017-11-14 | 西安前进电器实业有限公司 | A kind of pole-mounted circuit breaker failure detector |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133489A (en) * | 2019-04-26 | 2019-08-16 | 国网湖北省电力有限公司电力科学研究院 | The simulated failure applying method of breaker singlephase earth fault on one or two fusion serial columns |
| CN110133489B (en) * | 2019-04-26 | 2021-01-08 | 国网湖北省电力有限公司电力科学研究院 | Simulated fault applying method and system for single-phase earth fault of primary-secondary fusion complete set of pole circuit breaker |
| CN111707856A (en) * | 2020-06-22 | 2020-09-25 | 昆明理工大学 | Power system fault current measuring method designed by utilizing waveform superposition principle |
| CN111707856B (en) * | 2020-06-22 | 2021-05-04 | 昆明理工大学 | Power system fault current measuring method designed by utilizing waveform superposition principle |
| CN112230161A (en) * | 2020-09-28 | 2021-01-15 | 国网湖北省电力有限公司电力科学研究院 | Detection method for single-phase earth fault line selection function |
| CN112230161B (en) * | 2020-09-28 | 2022-02-25 | 国网湖北省电力有限公司电力科学研究院 | Detection method for single-phase earth fault line selection function |
| CN112578310A (en) * | 2020-11-12 | 2021-03-30 | 国网湖北省电力有限公司电力科学研究院 | Detection method for single-phase grounding line selection tripping function |
| CN112578310B (en) * | 2020-11-12 | 2022-02-25 | 国网湖北省电力有限公司电力科学研究院 | Detection method for single-phase grounding line selection tripping function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108872843B (en) | 2019-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108872843B (en) | A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature | |
| CN100592441C (en) | Electron type current transformer for ultrahigh voltage transmission lines and corona loss measurement device thereof | |
| Zadeh et al. | Implementation and testing of directional comparison bus protection based on IEC61850 process bus | |
| CN101545961A (en) | System and method for polarity testing of electronic transformer | |
| CN105785157B (en) | Double main transformer longitudinal differential protection cyclization test methods | |
| US10345363B2 (en) | High-fidelity voltage measurement using resistive divider in a capacitance-coupled voltage transformer | |
| Schweitzer et al. | Defining and measuring the performance of line protective relays | |
| CN115411713A (en) | Power distribution network tree line discharge fault current transfer arc extinction experiment platform and method | |
| CN207440180U (en) | A kind of high-voltage circuitbreaker comprehensive tester | |
| CN201364382Y (en) | Testing device used for relay protection device of zinc oxide lightning arrester | |
| CN102879710A (en) | System and method for detecting single-phase ground fault point of power distribution line | |
| CN104483639A (en) | Residual magnetism estimation method for non-fault tripping of YNd11 type three-phase combined transformer | |
| CN104090174A (en) | Method and device for integrated line parameter insulation and phase checking test | |
| CN204214991U (en) | A kind of equipment and system of testing electronic mutual inductor polarity | |
| CN104301163A (en) | GOOSE time mark test method and system | |
| CN204287355U (en) | The specified time-delay detection system of Intelligent substation merging unit | |
| CN201226292Y (en) | Electron type current transformer for ultrahigh voltage transmission line and apparatus for measuring corona loss thereof | |
| CN102279307A (en) | Power distribution network intelligent type multifunctional capacitive current tester | |
| CN110221106A (en) | Electric energy metering device secondary-combination termination | |
| CN216285463U (en) | Power flow analyzer for power system | |
| CN102944858B (en) | Residual current device action characteristic detector calibration instrument separating switch | |
| CN109061460A (en) | A kind of pole-mounted circuit breaker quickly cuts off the accurate measurement method of failures | |
| CN211718504U (en) | Alternating-current and direct-current function calibrator for insulation monitoring device | |
| CN205333812U (en) | Test system of high -voltage switch contact | |
| US11105832B2 (en) | High-fidelity voltage measurement using a capacitance-coupled voltage transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |