CN205263289U - GIS is with frequency homophase ac voltage withstand test test device reliability verification system - Google Patents
GIS is with frequency homophase ac voltage withstand test test device reliability verification system Download PDFInfo
- Publication number
- CN205263289U CN205263289U CN201520887231.9U CN201520887231U CN205263289U CN 205263289 U CN205263289 U CN 205263289U CN 201520887231 U CN201520887231 U CN 201520887231U CN 205263289 U CN205263289 U CN 205263289U
- Authority
- CN
- China
- Prior art keywords
- homophase
- voltage
- gis
- frequency
- frequently
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 138
- 238000012795 verification Methods 0.000 title abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims description 14
- 238000004382 potting Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 abstract description 2
- 230000003278 mimic effect Effects 0.000 abstract 1
- 230000004224 protection Effects 0.000 description 52
- 238000000034 method Methods 0.000 description 31
- 230000008569 process Effects 0.000 description 14
- 230000000630 rising effect Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
The utility model discloses a GIS is with frequency homophase ac voltage withstand test test device reliability verification system, apply the same homophase ac voltage withstand test testing system frequently of GIS of voltage, the withstand voltage testing system of frequency conversion series resonance who is used for simulating the generating line side isolator's of field test GIS equipment GIS analogue means and is used for the mimic bus running voltage including being arranged in simulating field test, GIS is connected with GIS analogue means's one end with frequency homophase ac voltage withstand test testing system, GIS analogue means's the other end and frequency conversion series resonance withstand voltage test headtotail. This the mainly used inspection GIS of this system is with whether homophase ac voltage withstand test test device is safe, reliable frequently.
Description
Technical field
The utility model relates to Withstand test device field, and particularly a kind of GIS is with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently.
Background technology
GIS equipment is after interval enlarging and maintenance at present, and particularly double bus scheme GIS in order to ensure safety, all need to carry out withstand voltage test in the situation that original operation part has a power failure. and for some important load-center substations and with the GIS transformer station of the important loads such as traction station of electrical railroad, these transformer stations require very high to power supply reliability, be difficult to carry out withstand voltage test in the situation that of the power failure of full station, so can adopt GIS with frequency homophase AC voltage withstand test technology, this experimental technique adopts neighbouring device working voltage (as getting bus-bar potential transformer secondary side voltage) conduct with reference to voltage, obtain test voltage by resonance manner, and utilize PHASE-LOCKED LOOP PLL TECHNIQUE to carry out real time dynamic tracing to its frequency and phase place, make the frequency of test voltage and working voltage and phase place in cophasal state frequently.
Owing to being to carry out under the charged condition of adjacent part with homophase withstand voltage test frequently, its safety and reliability is particularly important. For fear of occurring in test various accidents that isolation fracture is punctured, adjacent operation part is had a negative impact and experimental facilities and the person are caused to danger, will seeking common ground, homophase withstand voltage test control protective unit is enough reliable frequently; For this reason; in patent " a kind of GIS is with frequently homophase AC voltage withstand test control guard method and system " (application number 201410536439.6), provide a set of control guard method, mainly comprised three kinds of frequency plot protection, high pressure overvoltage protection and high pressure arc protections. But whether the same frequency homophase experimental rig based on above-mentioned guard method can meet expection requirement, action message, also needs a kind of device for verifying reliability to check to verify with whether Pass Test requirement of homophase alternating-current voltage resistance test device frequently.
Utility model content
The purpose of this utility model is just to provide a kind of GIS with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently, to check with whether homophase alternating-current voltage resistance test device is safe and reliable frequently.
The purpose of this utility model is achieved through the following technical solutions:
The GIS that the utility model provides, with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently, comprises that GIS is with frequency homophase AC voltage withstand test system, GIS analogue means and variable-frequency series-resonance withstand voltage test system;
Described GIS, with frequency homophase AC voltage withstand test system, applies voltage U 1 for simulated field test;
Described GIS analogue means, for the bus bar side isolating switch of simulated field test GIS equipment;
Described variable-frequency series-resonance withstand voltage test system, for analog bus working voltage U2;
Described GIS is connected with one end of GIS analogue means with frequency homophase AC voltage withstand test system; The other end of described GIS analogue means is connected with variable-frequency series-resonance withstand voltage test system.
Further, described GIS comprises with frequency homophase experiment power supply, same homophase testing transformer frequently, same homophase current-limiting resistance frequently, REgulatable reactor and same frequency homophase divider with frequency homophase AC voltage withstand test system;
Described same homophase experiment power supply is frequently connected with same homophase testing transformer frequently one side; Described one end with frequency homophase testing transformer opposite side is connected with same homophase current-limiting resistance frequently; The described other end ground connection with the side that homophase current-limiting resistance is connected with same frequency homophase testing transformer frequently; Described same homophase current-limiting resistance is frequently connected in series with REgulatable reactor; Described REgulatable reactor is connected with same homophase divider one end frequently; The described same other end of homophase divider is frequently connected with ground; Described same homophase divider is frequently connected with one end of GIS analogue means with described REgulatable reactor link.
Further, described GIS analogue means comprises isolating switch and the high-potting sleeve pipe that is symmetricly set in isolating switch both sides;
Described isolating switch one end is provided with grounding switch, and described grounding switch one end is connected with isolating switch, and the described grounding switch other end is connected with ground.
Further, described variable-frequency series-resonance withstand voltage test system comprises frequency conversion experiment power supply, testing transformer, current-limiting resistance, reactor and divider;
Described frequency conversion experiment power supply is connected with an input side of testing transformer; One end of another outlet side of described testing transformer is connected with current-limiting resistance; The other end ground connection of the opposite side of described testing transformer; Described current-limiting resistance is connected in series with reactor; Described reactor is connected with divider one end; The described divider other end is connected with ground; One end that described divider is connected with described reactor is connected with the other end of GIS analogue means.
Owing to having adopted technique scheme, the utlity model has following advantage:
The same homophase AC voltage withstand test frequently of the GIS system of the utility model employing, safely whether this system be mainly used in checking GIS with frequency homophase alternating-current voltage resistance test device, reliably. Logical this system can ensure to complete smoothly with frequency homophase AC voltage withstand test process.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating below, or can from practice of the present utility model, be instructed. Target of the present utility model and other advantages can be realized and be obtained by description and claims below.
Brief description of the drawings
Brief description of the drawings of the present utility model is as follows.
Fig. 1 is that GIS is with frequency homophase alternating-current voltage resistance test device reliability compliance test system.
Fig. 2 is GIS analogue means schematic diagram.
Fig. 3 is GIS analogue means pneumatic diagram.
Fig. 4 is GIS analogue means electric diagram.
Fig. 5 is reliability verification method flow process.
Fig. 6 is frequency plot protection checking flow process.
Fig. 7 is overvoltage protection verification method flow process.
Fig. 8 is high pressure arc protection verification method flow process.
In figure: 1 is that the same homophase AC voltage withstand test frequently of GIS system, 2 is that GIS analogue means, 3 is that variable-frequency series-resonance withstand voltage test system, 4 is that isolating switch, 5 is that sleeve pipe, 6 is grounding switch.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment 1
As shown in Figure 1, the GIS that the present embodiment provides is with frequency homophase AC voltage withstand test system and method, adopt neighbouring device working voltage (as getting bus-bar potential transformer secondary side voltage) conduct with reference to voltage, obtain test voltage by resonance manner, and utilize PHASE-LOCKED LOOP PLL TECHNIQUE to carry out real time dynamic tracing to its frequency and phase place, make the frequency of test voltage and working voltage and phase place in cophasal state frequently.
Owing to being to carry out under the charged condition of adjacent part with homophase withstand voltage test frequently, its safety and reliability is particularly important. For fear of occurring in test various accidents that isolation fracture is punctured, adjacent operation part had a negative impact and experimental facilities and the person are caused to danger, requiring with homophase withstand voltage test control protective unit is enough reliable frequently.
A kind of GIS that the present embodiment provides, with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently, comprises that GIS is with frequency homophase AC voltage withstand test system 1, GIS analogue means 2 and variable-frequency series-resonance withstand voltage test system 3;
Described GIS, with frequency homophase AC voltage withstand test system, applies voltage U 1 for simulated field test;
Described GIS analogue means, for the bus bar side isolating switch 4 of simulated field test GIS equipment;
Described variable-frequency series-resonance withstand voltage test system, for analog bus working voltage U2;
Described GIS is connected with one end of GIS analogue means with frequency homophase AC voltage withstand test system; The other end of described GIS analogue means is connected with variable-frequency series-resonance withstand voltage test system.
Described GIS comprises with frequency homophase experiment power supply, same homophase testing transformer frequently, same homophase current-limiting resistance frequently, REgulatable reactor and same frequency homophase divider with frequency homophase AC voltage withstand test system;
Described same homophase experiment power supply is frequently connected with same homophase testing transformer frequently one side; Described one end with frequency homophase testing transformer opposite side is connected with same homophase current-limiting resistance frequently; The described other end ground connection with the side that homophase current-limiting resistance is connected with same frequency homophase testing transformer frequently; Described same homophase current-limiting resistance is frequently connected in series with REgulatable reactor; Described REgulatable reactor is connected with same homophase divider one end frequently; The described same other end of homophase divider is frequently connected with ground; Described same homophase divider is frequently connected with one end of GIS analogue means with described REgulatable reactor link.
Described GIS analogue means comprises isolating switch and is symmetricly set in the high-potting sleeve pipe 5 of isolating switch both sides;
Described isolating switch one end is provided with grounding switch, and described grounding switch one end is connected with isolating switch 4, and described grounding switch 6 other ends are connected with ground.
Described variable-frequency series-resonance withstand voltage test system comprises frequency conversion experiment power supply, testing transformer, current-limiting resistance, reactor and divider;
Described frequency conversion experiment power supply is connected with an input side of testing transformer; One end of another outlet side of described testing transformer is connected with current-limiting resistance; The other end ground connection of the opposite side of described testing transformer; Described current-limiting resistance is connected in series with reactor; Described reactor is connected with divider one end; The described divider other end is connected with ground; One end that described divider is connected with described reactor is connected with the other end of GIS analogue means.
The present embodiment also provides a kind of GIS with frequency homophase alternating-current voltage resistance test device reliability verification method, comprises the following steps:
S100: prepare verification experimental verification preparation;
S200: carry out frequency plot protection checking by changing electric voltage frequency and phase place, carry out if the verification passes the checking of high pressure overvoltage protection; Otherwise experimental rig is unreliable;
S300: carry out the checking of high pressure overvoltage protection by changing voltage magnitude, carry out if the verification passes the checking of high pressure arc protection, otherwise experimental rig is unreliable;
S400: carry out the checking of high pressure arc protection by changing voltage magnitude, experimental rig is reliable if the verification passes, otherwise experimental rig is unreliable.
Described frequency plot protection checking concrete steps are as follows:
S201: voltage U 2 is risen to specified phase voltage and rated frequency by variable-frequency power sources; Rise to specified phase voltage with frequency homophase mains side voltage U 1;
S202: frequency changing power device is carried out to frequency trim, the frequency of voltage U 2 is regulated by default little step value at increase and decrease both direction, judge in this process and protect and whether be failure to actuate, if so, enter next step; If not, frequency plot is protected authentication failed;
S203: frequency changing power device is carried out to frequency coarse adjustment, the frequency of voltage U 2 is repeated to reduce N time by preset value; Repeat to increase N time by preset value again, N is natural number; Judge and whether in this process, protect action message, if so, enter next step; If not, frequency plot is protected authentication failed;
S204: to regulating with REgulatable reactor in frequency homophase device, change the phase place of voltage U 1, in the time that voltage U 1 is rated voltage, increase test voltage by preset value, by regulating REgulatable reactor to change voltage U 1 phase place; Judge whether to meet the following conditions: be failure to actuate during lower than phase place definite value in phase deviation, action message while exceeding phase place definite value; If met, frequency plot protection checking is qualified; If do not met, frequency plot protection authentication failed;
Described phase deviation is wave voltage phase place and the difference of rear cycle voltage-phase the last week; Described phase deviation definite value is the phase difference value that refers to that default allows.
Described high pressure overvoltage protection checking concrete steps are as follows:
S301: voltage is risen to specified phase voltage U0 and rated frequency by variable-frequency power sources;
S302: setting test voltage protection value is voltage U 0, repeats N rising test voltage until exceed specified phase voltage, and N is natural number; Judge whether overvoltage protection moves, if so, enter next step; If not, high pressure overvoltage protection authentication failed;
S303: keep test voltage U1 and busbar voltage U2 to be rated voltage U0,, repeat N time by 10% the speed rising busbar voltage U2 that exceedes per second by variable-frequency power sources, N is natural number; Judge whether overvoltage protection moves, if so, enter next step; If not, high pressure overvoltage protection authentication failed;
S304: keep test voltage U1 and busbar voltage U2 to be rated voltage U0, by default step value rising test voltage U2, repeat N time, N is natural number; Judge whether overvoltage protection moves, if so, enter next step; If not, high pressure overvoltage protection authentication failed;
S305: rising test voltage until exceed and set fracture voltage protection value, repeats N time, and N is natural number; Judge whether overvoltage protection moves, if so, the checking of high pressure overvoltage protection is qualified; If not, high pressure overvoltage protection authentication failed;
Described fracture voltage protection value is the poor default protection threshold value of isolating switch fracture both end voltage.
Described high pressure arc protection checking concrete steps are as follows:
S401: voltage is risen to specified phase voltage U0 and frequency by variable-frequency power sources;
S402: keep test voltage U1 and busbar voltage U2 to be rated voltage U0, reduce busbar voltage U2 by default step value, repeat N time, N is natural number; Judge whether high pressure arc protection moves, if so, enter next step; If not, high pressure arc protection authentication failed;
S403: keep test voltage U1 and busbar voltage U2 to be rated voltage U0, reduce test voltage U1 by default step value, repeat N time, N is natural number; Judge whether high pressure arc protection moves, if so, the checking of high pressure arc protection is qualified; If not, high pressure arc protection authentication failed.
Embodiment 2
The GIS that the present embodiment provides, with frequency homophase alternating-current voltage resistance test device reliability verification method, is applied to homophase alternating-current voltage resistance test device inspection frequently, and this reliability verification method is applicable to GIS with frequency homophase alternating-current voltage resistance test device. This reliability compliance test system is made up of three parts: in Fig. 1, left side part 1 is that GIS is with frequency homophase AC voltage withstand test system, comprise with frequency homophase experiment power supply, testing transformer, current-limiting resistance, REgulatable reactor and divider, simulated field test pressurization, applying voltage is U1; Middle part 2 is GIS analogue means, for the bus bar side isolating switch of simulated field test GIS equipment; Right side the 3rd part is variable-frequency series-resonance withstand voltage test system, for analog bus working voltage, U2.
Voltage U 1 in the present embodiment refers to that same homophase power supply is frequently applied to the voltage on analogue means sleeve pipe, and U2 refers to that variable-frequency power sources is applied to the voltage on analogue means sleeve pipe.
Wherein as shown in Figure 2, Fig. 2 is GIS analogue means schematic diagram to part 2 detailed structure, and Fig. 3 is GIS analogue means pneumatic diagram, and Fig. 4 is GIS analogue means electric diagram; In figure, DS represents isolating switch; ES and FES represent grounding switch; Grounding switch in the present embodiment also can arrange two, lays respectively at the both sides of isolating switch; GIS analogue means is made up of high-potting sleeve pipe and the true type isolating switch of both sides, and grounding switch is equipped with in isolating switch both sides, and each air chamber is all provided with gas density relay.
As shown in Figure 5, Fig. 5 is reliability verification method flow process to whole reliability verification method flow chart:
S100: carry out test connection according to Fig. 1 schematic diagram, complete checking preparation.
S200: the frequency plot protection checking that advanced luggage is put, by changing electric voltage frequency and phase place. Carry out if the verification passes the checking of high pressure overvoltage protection, otherwise experimental rig is unreliable.
S300: carry out the high pressure overvoltage protection checking of device. Carry out if the verification passes the checking of high pressure arc protection, otherwise experimental rig is unreliable.
S400: carry out the high pressure arc protection checking of device. Experimental rig is reliable if the verification passes, otherwise experimental rig is unreliable.
Fig. 6 is frequency plot protection checking flow process, wherein step S200 frequency plot protection checking link comprise following some: (taking rated voltage 110kV as example)
S201: voltage U 2 is risen to specified phase voltage, frequency 50Hz by variable-frequency power sources; Rise to specified phase voltage with frequency homophase mains side voltage U 1;
S202: frequency changing power device is carried out to frequency trim, simulation system normal frequency fluctuation: first U2 frequency is down to 49.5Hz according to the stepping of 0.1Hz by 50Hz, then returns to 50Hz according to the stepping of 0.1Hz, protect and should not move in this process;
S203: frequency changing power device is carried out to frequency coarse adjustment: U2 frequency is directly down to 49.5Hz by 50Hz, repeats 10 times; Rise to 50.5Hz by 50Hz again, repeat 10 times, in this process, action message is answered in protection;
S204: to regulating with REgulatable reactor in frequency homophase device, U1 phase place is changed: in the time that rated voltage is 110kV, test voltage rises to 30kV, by regulating reactor to change phase place; Test voltage rises to 80kV, by regulating reactor to change phase place; Test voltage rises to 120kV, by regulating reactor to change phase place, should not move during lower than phase place definite value in phase deviation, answers action message while exceeding phase place definite value;
The meaning of the phase deviation in the present embodiment is wave voltage phase place and the difference of rear cycle voltage-phase the last week; Phase deviation definite value refers to the phase difference value that default allows, and such as described in last patent, in the time that rated voltage is 110kV, in the time that test voltage is greater than 100kV, phase deviation is not more than 30 °, is greater than this setting value, frequency plot protection action.
Fig. 7 is overvoltage protection verification method flow process, wherein step S300 high pressure overvoltage protection checking link comprise following some: (taking rated voltage 110kV as example)
S301: voltage is risen to specified phase voltage U0, frequency 50Hz by variable-frequency power sources;
S302: setting test voltage protection value is U0, and rising test voltage, to exceeding specified phase voltage, repeats 10 times;
S303: keep test voltage U1 and busbar voltage U2 to be rated voltage U0,, repeat 10 times by 10% the speed rising busbar voltage U2 that exceedes per second by variable-frequency power sources;
S304: keep test voltage U1 and busbar voltage U2 to be rated voltage U0, by 10% the speed rising test voltage U2 that exceedes per second, repeat 10 times;
S305: setting fracture voltage protection value is U0+10kV, and rising test voltage, to exceeding 2U0+10kV, repeats 10 times.
There is a fracture in the isolating switch in the present embodiment; as shown in Figure 1; left end pressurization U1; right-hand member pressurization U2; fracture voltage is | U1-U2|, and cause fracture voltage excessive in order to ensure going wrong in process of the test, the person and equipment are impacted; system can be set a fracture voltage protection value, protection action in the time being greater than this protection value.
Fig. 8 is high pressure arc protection verification method flow process, wherein step S400 high pressure arc protection checking link comprise following some:
S401: voltage is risen to specified phase voltage U0, frequency 50Hz by variable-frequency power sources;
S402: keep test voltage U1 and busbar voltage U2 to be rated voltage U0, by the rate reduction busbar voltage U2 that exceedes 10%, repeat 10 times;
S403: keep test voltage U1 and busbar voltage U2 to be rated voltage U0, by the rate reduction test voltage U1 that exceedes 10%, repeat 10 times;
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (4)
1.GIS, with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently, is characterized in that: comprise that GIS is with frequency homophase AC voltage withstand test system, GIS analogue means and variable-frequency series-resonance withstand voltage test system;
Described GIS, with frequency homophase AC voltage withstand test system, applies voltage U 1 for simulated field test;
Described GIS analogue means, for the bus bar side isolating switch of simulated field test GIS equipment;
Described variable-frequency series-resonance withstand voltage test system, for analog bus working voltage U2;
Described GIS is connected with one end of GIS analogue means with frequency homophase AC voltage withstand test system; The other end of described GIS analogue means is connected with variable-frequency series-resonance withstand voltage test system.
2. the same homophase alternating-current voltage resistance test device frequently of GIS as claimed in claim 1 reliability demonstration system, is characterized in that: the same frequency of described GIS homophase AC voltage withstand test system comprises with frequency homophase experiment power supply, with frequency homophase testing transformer, same homophase current-limiting resistance frequently, REgulatable reactor and same homophase divider frequently;
Described same homophase experiment power supply is frequently connected with same homophase testing transformer frequently one side; Described one end with frequency homophase testing transformer opposite side is connected with same homophase current-limiting resistance frequently; The described other end ground connection with the side that homophase current-limiting resistance is connected with same frequency homophase testing transformer frequently; Described same homophase current-limiting resistance is frequently connected in series with REgulatable reactor; Described REgulatable reactor is connected with same homophase divider one end frequently; The described same other end of homophase divider is frequently connected with ground; Described same homophase divider is frequently connected with one end of GIS analogue means with described REgulatable reactor link.
3. GIS as claimed in claim 1, with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently, is characterized in that: described GIS analogue means comprises isolating switch and is symmetricly set in the high-potting sleeve pipe of isolating switch both sides;
Described isolating switch one end is provided with grounding switch, and described grounding switch one end is connected with isolating switch, and the described grounding switch other end is connected with ground.
4. GIS as claimed in claim 1, with the system of homophase alternating-current voltage resistance test device reliability demonstration frequently, is characterized in that: described variable-frequency series-resonance withstand voltage test system comprises frequency conversion experiment power supply, testing transformer, current-limiting resistance, reactor and divider;
Described frequency conversion experiment power supply is connected with an input side of testing transformer; One end of another outlet side of described testing transformer is connected with current-limiting resistance; The other end ground connection of the opposite side of described testing transformer; Described current-limiting resistance is connected in series with reactor; Described reactor is connected with divider one end; The described divider other end is connected with ground; One end that described divider is connected with described reactor is connected with the other end of GIS analogue means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520887231.9U CN205263289U (en) | 2015-11-09 | 2015-11-09 | GIS is with frequency homophase ac voltage withstand test test device reliability verification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520887231.9U CN205263289U (en) | 2015-11-09 | 2015-11-09 | GIS is with frequency homophase ac voltage withstand test test device reliability verification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205263289U true CN205263289U (en) | 2016-05-25 |
Family
ID=56004811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520887231.9U Active CN205263289U (en) | 2015-11-09 | 2015-11-09 | GIS is with frequency homophase ac voltage withstand test test device reliability verification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205263289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596246A (en) * | 2019-02-20 | 2020-08-28 | 国网冀北电力有限公司 | Same-frequency same-phase calibration device and calibration method thereof |
-
2015
- 2015-11-09 CN CN201520887231.9U patent/CN205263289U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596246A (en) * | 2019-02-20 | 2020-08-28 | 国网冀北电力有限公司 | Same-frequency same-phase calibration device and calibration method thereof |
| CN111596246B (en) * | 2019-02-20 | 2023-06-06 | 国网冀北电力有限公司 | Same-frequency and same-phase verification device and verification method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11368017B2 (en) | Safe operation method for voltage reduction arc suppression of ground fault phase of non-effective ground system | |
| CN203798934U (en) | Electric power DC insulation fault simulation and testing device | |
| CN106374380B (en) | GIS busbares standby spacing, which does not have a power failure, extends function module and enlargement method | |
| CN101304170A (en) | System debug method for high voltage direct current transmission project | |
| CN104242255B (en) | A kind of GIS is with the ac voltage withstanding controlling test guard method of frequency homophase and system | |
| KR20190017930A (en) | Closing control method of high voltage DC breaker | |
| CN107979080B (en) | Method and device for determining rated voltage of lightning arrester along half-wavelength power transmission line | |
| CN105388440A (en) | Method for verifying reliability of common-frequency in-phase alternating-current voltage-withstanding testing apparatus of GIS | |
| CN105467308B (en) | A kind of flexible DC power transmission engineering voltage source converter valve short circuit current test method | |
| CN204116405U (en) | A kind of GIS is with frequency homophase controlling test protective device | |
| JPWO2018109889A1 (en) | DC circuit breaker testing equipment | |
| CN106443334B (en) | A kind of distribution network fault line selection method based on zero-sequence current difference Polarity comparision | |
| CN202583422U (en) | Nuclear power plant emergency diesel generator set on-line verification device | |
| CN205263289U (en) | GIS is with frequency homophase ac voltage withstand test test device reliability verification system | |
| CN209543688U (en) | A kind of substation's experience system | |
| CN103048586B (en) | The verification method of voltage transformer (VT) wiring correctness | |
| CN203166505U (en) | AC side overvoltage protection device used for flexible DC transmission system | |
| CN208489651U (en) | A kind of singlephase earth fault arc-extinguishing system of small current neutral grounding system | |
| CN206364435U (en) | GIS buses standby spacing does not have a power failure enlarging functional module | |
| CN102749540B (en) | Testing device and method for hierarchical controllable shunt reactor valve control system | |
| CN202171890U (en) | Relay protection test simulation apparatus | |
| CN103532112A (en) | Direct-current differential protection method for sectional type valve bank | |
| CN110445044B (en) | Transformation station transformation method for single-bus operation | |
| EP3235088B1 (en) | Method and arrangement for transmitting electric energy via an electric line | |
| CN107834527A (en) | Half-wave power transmission line power fluctuates the optimal control method and device of overvoltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |