CN105259489A - Extra-high voltage neutral-point-electric-reactor site induction voltage withstanding testing system and method - Google Patents
Extra-high voltage neutral-point-electric-reactor site induction voltage withstanding testing system and method Download PDFInfo
- Publication number
- CN105259489A CN105259489A CN201510859087.2A CN201510859087A CN105259489A CN 105259489 A CN105259489 A CN 105259489A CN 201510859087 A CN201510859087 A CN 201510859087A CN 105259489 A CN105259489 A CN 105259489A
- Authority
- CN
- China
- Prior art keywords
- voltage
- reactor
- neutral
- extra
- neutral reactor
- 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
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses an extra-high voltage neutral-point-electric-reactor site induction voltage withstanding testing system. The system comprises a variable-frequency testing power source, a testing transformer, a compensating capacitor unit and a tested product unit. The variable-frequency testing power source, the testing transformer, the compensating capacitor unit and the tested product unit are sequentially connected. The tested product unit comprises a neutral-point electric reactor and an alternating voltage measuring unit, and the neutral-point electric reactor and the alternating voltage measuring unit are connected in parallel. The invention further discloses an extra-high voltage neutral-point-electric-reactor site induction voltage withstanding testing method. Calculation is carried out according to parameters of site equipment, and it is prevented that a current is excessively large to damage the equipment. By means of the system and method, the bottleneck that a high-voltage large-current induction voltage withstanding test of a traditional electric reactor can not be carried out on site is broken through, it becomes possible that induction voltage withstanding of the 1,000-V extra-high voltage neutral-point electric reactor is carried out on site, the blank of domestic site neutral-point electric-reactor induction voltage withstanding tests is filled, and it is effectively guaranteed that a high-voltage project reliably and safely runs.
Description
Technical field
The present invention relates to neutral reactor withstand voltage test technical field, be specifically related to the on-the-spot induced over voltage withstand test system and method for a kind of extra-high voltage neutral reactor.
Background technology
When circuit is after the excision of both sides, the capacitive coupling existed between non-fault line and open-circuit line and inductive coupling, continue to provide secondary arc current to faulty line, thus during serious obstruction short circuit, arc light passage goes to dissociate; Simultaneously automatic reclosing is only at trouble spot arc extinction and dielectric strength just likely success after recovering, if secondary arc current is too large, can cause unsuccessful reclosing.By installing the reactor of one group of delta connection on the line additional, compensating capacitive coupling, thus suppressing the horizontal component of a part of secondary arc current; Install one group of star additional at circuit head and end and connect reactor for offsetting the vertical component of secondary arc current.Above-mentioned two groups of reactors can be equivalent to neutral point and install low reactance X over the ground additional
nthe reactor of Y-connection.
By the wave-record chart during faults such as electromagnetic transient state procedure ATP-EMTP simulation analysis and in-site modeling single-phase short circuit reclosing, known ultra-high voltage transformer station high-voltage shunt reactor neutral point and X
nit is 170.6kV that head end may bear ceiling voltage.Particularly between the first bar 1000kV in world Test and pilot project southeast Shanxi-Nanyang-Jingmen extra-high voltage limber up period, once there is the problem of neutral reactor insulation breakdown, the analysis found that it is because reactor turn-to-turn insulation is destroyed.But in current on-the-spot check test, the insulation examination for reactor is only limitted to execute withstand voltage test outward, and the method only examines the major insulation of reactor, and the turn-to-turn insulation of itself is not effectively examined.There is research institution's centering point reactor turn-to-turn insulation wire examination method to carry out tentative research in recent years both at home and abroad, and as high-frequency impulse concussion method and lightning impulse voltage test, but had no and be extensively extended in actual production.First, high-frequency impulse concussion method, only to occurring that the reactor of the defects such as turn-to-turn insulation short circuit is effective, then cannot realize measuring ability to the reactor that there is turn-to-turn insulation hidden danger and insulation breakdown do not occur; Secondly, examine turn-to-turn insulation with lightning impulse voltage test, major defect is that action time is short, and energy is low, and visual examination difficulty distinguishes, the electrical quantity variable quantity that causes of turn-to-turn short circuit is little in addition, is also difficult to distinguish from lightning impulse waveform; 3rd, above method needs huge testing equipment to drop into, and not only floor area is large, and transport, carrying, wiring are all very inconvenient.
Application number is that 200820067806.2 utility models disclose a kind of power supply device for controllable reactor induction voltage-resistant experiment and method for measurement of partial discharge thereof, relates to a kind of controlled reactor site test technology.Structure of the present invention is variable-frequency power sources cabinet (1), intermediate transformer (2), controlled reactor (6) connect successively, for controlled reactor (6) provides experiment power supply; Controlled reactor (6), detection impedance (5), instrument for measuring partial discharge (7) connect successively, detect the partial discharge quantity of controlled reactor (6); Intermediate transformer (2), capacitive divider (3), voltage table (4) connect successively, measure the trial voltage of intermediate transformer (2); Compensation reactor (8) is connected with controlled reactor (6), compensates the reactive current of controlled reactor (6).
Application number be 201310349281.7 invention relate to a kind of power supply device for controllable reactor induction voltage-resistant experiment, comprise variable-frequency power sources cabinet, intermediate transformer, voltage table, controlled reactor and instrument for measuring partial discharge, described variable-frequency power sources cabinet and intermediate transformer form circuit and are connected, described intermediate transformer and voltage table form circuit and are connected, described voltage table and controlled reactor form circuit and are connected, and described controlled reactor and instrument for measuring partial discharge form circuit and be connected.
Above-mentioned two patents are all about reactor induction voltage-resistant experiment, but the voltage swing 500kV electrical network of its design, can not meet the use of 1000kV electrical network, its middle transformer current comparatively conference damage transformer equipment when voltage is higher.
Summary of the invention
In view of this, the object of the invention is for the deficiencies in the prior art, there is provided a kind of extra-high voltage neutral reactor on-the-spot induced over voltage withstand test system and method, induced over voltage withstand test can be carried out to 1000kV extra-high voltage neutral reactor scene, the on-the-spot boost operations to reactor can be completed.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The on-the-spot induced over voltage withstand test system of a kind of extra-high voltage neutral reactor, comprise frequency conversion experiment power supply, testing transformer, compensation condenser unit, tested article unit, described frequency conversion experiment power supply, testing transformer, compensation condenser unit, tested article unit connect successively, described tested article unit comprises neutral reactor and ac voltage measurement unit, described neutral reactor and the parallel connection of ac voltage measurement unit.
Further, described testing transformer is exciting transformer.
Further, described compensation condenser unit comprises series compensation capacitor and parallel capacitor.
Further, described frequency conversion experiment power supply, testing transformer, series compensation capacitor, neutral reactor connect successively, and described parallel capacitor is in parallel with described neutral reactor.
Further, described frequency conversion experiment power supply comprises high-tension switch cabinet and variable-frequency power sources.
Further, described ac voltage measurement unit comprises kilovoltmeter.
The on-the-spot induced voltage test of a kind of extra-high voltage neutral reactor, comprises the steps:
1) carry out calculating preview according to field device parameters, prevent the excessive damage equipment of electric current, calculate induced over voltage withstand test magnitude of voltage U by neutral reactor parameter, the withstand voltage level according to 80% calculates, i.e. U=U
l* 0.8, U
lrepresent the voltage at neutral reactor two ends;
2) to the electric current I flowing through neutral reactor under trial voltage
lcalculate:
；
3) to the electric current I flowing through parallel capacitor under trial voltage
ccalculate:
；
4) to the electric current I flowing through series compensation capacitor and testing transformer
2calculate:
；
5) to electric current I
c, I
2numerical value analyze, whether the technical parameter of parallel capacitor, series compensation capacitor and testing transformer meets the demands;
6) variable-frequency power sources high-frequency is kept to export, the size of current of centering point reactor, parallel capacitor, series compensation capacitor and testing transformer is analyzed, and judges whether the insulation examination of reactor has equivalence with power frequency during actual motion;
7) calculate preview complete, field equipment connecting, frequency conversion experiment power supply output voltage, whether the thermal stability of analytical calculation neutral reactor and dynamic stability meet the demands;
8) the on-the-spot induced over voltage withstand test of neutral reactor is completed.
The invention provides the on-the-spot induced over voltage withstand test system and method for a kind of extra-high voltage neutral reactor, ac voltage measurement unit can the voltage of centering point reactor calculate, kilovoltmeter is adopted to measure alternating voltage, be made up of high-tension measurement part and low pressure Displaying Meter, can ensure to monitor the reactor voltage of withstand voltage test, ensure that evaluation is corresponding with measurement numerical value.In method, whether equipment technical parameters meets the demands and refers to and calculate the electric current of gained or voltage within the nominal parameter of equipment, can not cause damage, carrying out smoothly of warranty test to equipment.When power supply high-frequency exports, realizing the object that series compensation capacitor and parallel capacitor play reactive-load compensation separately, is 252.4Hz through the place's loop resonance frequency calculated.The thermal stability of reactor and dynamic stability refer to specified KA Rms and Rated peak withstand current, by showing whether it meets the requirement of site test to the test of two numerical value.
The invention has the beneficial effects as follows:
1) induced over voltage withstand test can be carried out to 1000kV extra-high voltage neutral reactor scene, the on-the-spot examination to reactor turn-to-turn insulation can be completed;
2) needed for pilot system, pressure build-up test transformer rated voltage is low, reduces the manufacture difficulty of testing transformer;
3) pilot system carries reactive-load compensation capacitor, and required meritorious power supply capacity is little, can realize the requirement of site test;
4) equipment conveying is convenient, and floor area is little, and test method is flexible and changeable, adapts to the transport between different tests scene.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the system construction drawing of the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor of the present invention;
Fig. 2 is the system construction drawing that each equipment of the present invention links in detail;
Fig. 3 is electrical test schematic diagram of the present invention;
Fig. 4 method flow diagram of the present invention.
Embodiment
Show further invention technical scheme below in conjunction with Fig. 1 to Fig. 4, embodiment is as follows:
Embodiment one
Present embodiments provide the on-the-spot induced over voltage withstand test system of a kind of extra-high voltage neutral reactor, comprise frequency conversion experiment power supply 6, testing transformer 3, compensation condenser unit 4, tested article unit 5, described frequency conversion experiment power supply 6, testing transformer 3, compensation condenser unit 4, tested article unit 5 connect successively, described tested article unit 5 comprises neutral reactor 9 and ac voltage measurement unit 10, described neutral reactor 9 and ac voltage measurement unit 10 parallel connection.The trial voltage of ac voltage measurement cell pairs point reactor is measured, the correctness of verification computation
Described testing transformer 3 comprises exciting transformer, excites resonant tank, makes inductance in loop and electric capacity generation resonance by frequency conversion experiment power supply output frequency.
Described compensation condenser unit 4 comprises series compensation capacitor 7 and parallel capacitor 8.
Described frequency conversion experiment power supply 6, testing transformer 3, series compensation capacitor 7, neutral reactor 9 connect successively, and described parallel capacitor 8 is in parallel with described neutral reactor 9.
Described frequency conversion experiment power supply 6 comprises high-tension switch cabinet 1 and variable-frequency power sources 2, and high-tension switch cabinet plays the effect of protection to testing transformer, prevents the excessive damage equipment of electric current.
Described ac voltage measurement unit 10 comprises kilovoltmeter.Adopt kilovoltmeter to measure alternating voltage, be made up of high-tension measurement part and low pressure Displaying Meter, can ensure to monitor the reactor voltage of withstand voltage test, ensure that evaluation is corresponding with measurement numerical value.
Embodiment two
Present embodiments provide the on-the-spot induced voltage test of a kind of extra-high voltage neutral reactor, comprise the steps:
1) carry out calculating preview according to field device parameters, prevent the excessive damage equipment of electric current, calculate induced over voltage withstand test magnitude of voltage U by neutral reactor parameter, the withstand voltage level according to 80% calculates, i.e. U=U
l* 0.8, U
lrepresent the voltage at neutral reactor two ends;
2) to the electric current I flowing through neutral reactor under trial voltage
lcalculate:
；
3) to the electric current I flowing through parallel capacitor under trial voltage
ccalculate:
；
4) to the electric current I flowing through series compensation capacitor and testing transformer
2calculate:
；
5) to electric current I
c, I
2numerical value analyze, whether the technical parameter of parallel capacitor, series compensation capacitor and testing transformer meets the demands;
6) variable-frequency power sources high-frequency is kept to export, the size of current of centering point reactor, parallel capacitor, series compensation capacitor and testing transformer is analyzed, and judges whether the insulation examination of reactor has equivalence with power frequency during actual motion;
7) calculate preview complete, field equipment connecting, frequency conversion experiment power supply output voltage, whether the thermal stability of analytical calculation neutral reactor and dynamic stability meet the demands;
8) the on-the-spot induced over voltage withstand test of neutral reactor is completed.
Embodiment three
For certain power grid construction, the on-the-spot induced over voltage withstand test of 1000kV extra-high voltage neutral reactor, first carry out calculating preview, the Capacity Selection of cut-offfing selecting high-tension switch cabinet is 1250A; Variable-frequency power sources adopts capacity to be 450kW frequency conversion tank, output voltage range 0 ~ 350V, exports maximum current 1285A, frequency range 30 ~ 300Hz; Testing transformer adopts excitation varying capacity to be 450kVA, and low-pressure side adopts 350V double winding in parallel, rated voltage 400V, rated current 1125A, high-pressure side rated voltage 20kV, rated current 22.5A; Series compensation capacitor selects separate unit electric capacity to be 50nF, and shnt capacitor adopts 5 electric capacitys to be that the capacitor of 50nF is in parallel, and equivalent electric capacity is 250nF; Tested neutral reactor rated capacity 329kvar, rated current 30A, power frequency impedance value 412.49 Ω, inductance value is calculated as 1.313H.
By improving the frequency of out-put supply, change the output power of whole reactive-load compensation capacitor, thus realize the object that series compensation capacitor and parallel capacitor play reactive-load compensation separately, calculating whole pressure-resistant apparatus in the loop resonance frequency that series compensation capacitor, parallel capacitor and test specimen form according to Circuit theory is 252.4Hz.
As shown in Figure 3, be electrical test schematic diagram of the present invention, flow through the electric current I of neutral reactor
l:
；
The electric current I of parallel capacitor is flow through under trial voltage
ccalculate:
；
Flow through the electric current I of series compensation capacitor and testing transformer
2calculate:
；
Draw in the 60s of induced over voltage withstand test according to above-mentioned three formula of formula, the electric current flowing through neutral reactor is 124A, and the electric current flowing through series compensation capacitor and testing transformer is only about 20A.If take pure series resonant tank used at ordinary times, the electric current flowing through series compensation capacitor and testing transformer will reach 124A, and seriously beyond the rated current of testing transformer, scene cannot realize; And iff using the mode of parallel resonance, by the compensation of capacitor, the output current of testing transformer can be reduced, but the high-pressure side of testing transformer needs the high voltage exporting 260kV, and the difficulty of device fabrication is too large, cannot be applied to site test.The present invention is by being transformed daily used pressurized system, and the mode utilizing connection in series-parallel to combine achieves system resonance, existing equipment basis reaches and flows through test specimen high voltage, the object of big current.
Equipment to scene: high-tension switch cabinet, variable-frequency power sources, testing transformer, series compensation capacitor, parallel capacitor, neutral reactor and kilovoltmeter carry out wiring, carry out site test according to the result calculating preview, the thermal stability and the dynamic stability that detect reactor all meet the demands.
Test method of the present invention is clear, breach the bottleneck that conventional reactor induced over voltage withstand test cannot carry out high-voltage large current test at the scene, make 1000kV extra-high voltage neutral reactor scene carry out inducting-voltage proof and become possibility, fill up the blank of domestic on-the-spot neutral reactor induced over voltage withstand test, effectively ensure the reliable and secure operation of extra-high voltage project.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (7)
1. the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor, it is characterized in that: comprise frequency conversion experiment power supply, testing transformer, compensation condenser unit, tested article unit, described frequency conversion experiment power supply, testing transformer, compensation condenser unit, tested article unit connect successively, described tested article unit comprises neutral reactor and ac voltage measurement unit, described neutral reactor and the parallel connection of ac voltage measurement unit.
2. the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor as claimed in claim 1, is characterized in that: described testing transformer is exciting transformer.
3. the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor according to claim 1, is characterized in that: described compensation condenser unit comprises series compensation capacitor and parallel capacitor.
4. the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor according to claim 3, it is characterized in that: described frequency conversion experiment power supply, testing transformer, series compensation capacitor, neutral reactor connect successively, and described parallel capacitor is in parallel with described neutral reactor.
5. the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor according to claim 1, is characterized in that: described frequency conversion experiment power supply comprises high-tension switch cabinet and variable-frequency power sources.
6. the on-the-spot induced over voltage withstand test system of extra-high voltage neutral reactor according to claim 1, is characterized in that: described ac voltage measurement unit comprises kilovoltmeter.
7. the on-the-spot induced voltage test of extra-high voltage neutral reactor, is characterized in that: comprise the steps:
1) calculate according to field device parameters, prevent the excessive damage equipment of electric current, calculate induced over voltage withstand test magnitude of voltage U by neutral reactor parameter, the withstand voltage level according to 80% calculates, i.e. U=U
l* 0.8, U
lrepresent neutral reactor to dispatch from the factory withstand voltage;
2) to the electric current I flowing through neutral reactor under trial voltage
lcalculate:
；
3) to the electric current I flowing through parallel capacitor under trial voltage
ccalculate:
；
4) to the electric current I flowing through series compensation capacitor and testing transformer
2calculate:
；
5) to electric current I
c, I
2numerical value analyze, whether the technical parameter of parallel capacitor, series compensation capacitor and testing transformer meets the demands;
6) keep variable-frequency power sources high-frequency to export, the size of current of centering point reactor, parallel capacitor, series compensation capacitor and testing transformer is analyzed, and whether the insulation examination of reactor has equivalence with power frequency during actual motion;
7) calculate preview complete, field equipment connecting, frequency conversion experiment power supply output voltage, whether the thermal stability of analytical calculation neutral reactor and dynamic stability meet the demands;
8) the on-the-spot induced over voltage withstand test of neutral reactor is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510859087.2A CN105259489B (en) | 2015-11-30 | 2015-11-30 | Extra-high voltage neutral reactor scene induced over voltage withstand test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510859087.2A CN105259489B (en) | 2015-11-30 | 2015-11-30 | Extra-high voltage neutral reactor scene induced over voltage withstand test system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105259489A true CN105259489A (en) | 2016-01-20 |
| CN105259489B CN105259489B (en) | 2018-01-26 |
Family
ID=55099254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510859087.2A Active CN105259489B (en) | 2015-11-30 | 2015-11-30 | Extra-high voltage neutral reactor scene induced over voltage withstand test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105259489B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974290A (en) * | 2016-07-22 | 2016-09-28 | 国网河南省电力公司电力科学研究院 | Dry type air reactor turn-to-turn insulation performance detection system and method |
| CN106501696A (en) * | 2016-10-19 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of 500kV high-voltage shunt reactors scene local discharge test system and method |
| CN106771911A (en) * | 2016-12-09 | 2017-05-31 | 广西电友科技发展有限公司 | A kind of elementary errors compensation industrial frequency withstand voltage experimental rig in parallel |
| CN109633386A (en) * | 2018-12-05 | 2019-04-16 | 国网甘肃省电力公司电力科学研究院 | A kind of extra-high voltage 1100kVGIS Field AC Withstand Voltage Test test method |
| CN109932578A (en) * | 2017-12-15 | 2019-06-25 | 广州西门子变压器有限公司 | The method and apparatus that temperature rise test is carried out to a transformer to be measured |
| CN110398674A (en) * | 2019-08-30 | 2019-11-01 | 国网山西省电力公司电力科学研究院 | A kind of extra-high voltage parallel reactance is pressure-resistant and local discharge test device |
| CN111650442A (en) * | 2020-06-11 | 2020-09-11 | 山东电力设备有限公司 | Test loop structure and test method for loss measurement of shunt reactor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133083A (en) * | 1997-10-29 | 1999-05-21 | Mitsubishi Electric Corp | Electric apparatus testing device |
| CN201611376U (en) * | 2010-03-05 | 2010-10-20 | 湖北省电力试验研究院 | Local alternative-current pressure test power supply device of a 1000kV alternative-current extra-high voltage switch device |
| CN102175956A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Long duration induced voltage withstand test device of ultrahigh-voltage transformer |
| CN104635083A (en) * | 2015-01-30 | 2015-05-20 | 国网河南省电力公司电力科学研究院 | Field load testing device for power transformer |
| CN205157720U (en) * | 2015-11-30 | 2016-04-13 | 国网河南省电力公司电力科学研究院 | Withstand voltage test system is answered to extra -high voltage neutral point reactor telepresence |
-
2015
- 2015-11-30 CN CN201510859087.2A patent/CN105259489B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133083A (en) * | 1997-10-29 | 1999-05-21 | Mitsubishi Electric Corp | Electric apparatus testing device |
| CN201611376U (en) * | 2010-03-05 | 2010-10-20 | 湖北省电力试验研究院 | Local alternative-current pressure test power supply device of a 1000kV alternative-current extra-high voltage switch device |
| CN102175956A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Long duration induced voltage withstand test device of ultrahigh-voltage transformer |
| CN104635083A (en) * | 2015-01-30 | 2015-05-20 | 国网河南省电力公司电力科学研究院 | Field load testing device for power transformer |
| CN205157720U (en) * | 2015-11-30 | 2016-04-13 | 国网河南省电力公司电力科学研究院 | Withstand voltage test system is answered to extra -high voltage neutral point reactor telepresence |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974290A (en) * | 2016-07-22 | 2016-09-28 | 国网河南省电力公司电力科学研究院 | Dry type air reactor turn-to-turn insulation performance detection system and method |
| CN105974290B (en) * | 2016-07-22 | 2018-12-04 | 国网河南省电力公司电力科学研究院 | A kind of dry-type air-core reactor turn-to-turn insulation performance detecting system and method |
| CN106501696A (en) * | 2016-10-19 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of 500kV high-voltage shunt reactors scene local discharge test system and method |
| CN106771911A (en) * | 2016-12-09 | 2017-05-31 | 广西电友科技发展有限公司 | A kind of elementary errors compensation industrial frequency withstand voltage experimental rig in parallel |
| CN109932578A (en) * | 2017-12-15 | 2019-06-25 | 广州西门子变压器有限公司 | The method and apparatus that temperature rise test is carried out to a transformer to be measured |
| CN109932578B (en) * | 2017-12-15 | 2024-04-02 | 广州西门子能源变压器有限公司 | Method and device for carrying out temperature rise test on transformer to be tested |
| CN109633386A (en) * | 2018-12-05 | 2019-04-16 | 国网甘肃省电力公司电力科学研究院 | A kind of extra-high voltage 1100kVGIS Field AC Withstand Voltage Test test method |
| CN110398674A (en) * | 2019-08-30 | 2019-11-01 | 国网山西省电力公司电力科学研究院 | A kind of extra-high voltage parallel reactance is pressure-resistant and local discharge test device |
| CN111650442A (en) * | 2020-06-11 | 2020-09-11 | 山东电力设备有限公司 | Test loop structure and test method for loss measurement of shunt reactor |
| CN111650442B (en) * | 2020-06-11 | 2022-07-26 | 山东电力设备有限公司 | Test loop structure and test method for measuring loss of shunt reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105259489B (en) | 2018-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105974290B (en) | A kind of dry-type air-core reactor turn-to-turn insulation performance detecting system and method | |
| CN105259489B (en) | Extra-high voltage neutral reactor scene induced over voltage withstand test system and method | |
| EP3045930B1 (en) | Testing system of gis electronic mutual inductor and method therefor | |
| WO2015176687A1 (en) | Integrated high and low voltage ride through test system | |
| CN104181445A (en) | Converter transformer double side voltage applying partial discharge testing device and testing method thereof | |
| CN108548986A (en) | A kind of high resistance ground detecting system of small current neutral grounding system, device and method | |
| CN105182126B (en) | Improved distribution transformer energy efficiency metering detection method | |
| CN105429131B (en) | Load model construction method considering load frequency characteristics | |
| CN108872771A (en) | A kind of transformer preventive trial equivalent method | |
| CN102565618A (en) | Method for detecting zero-sequence voltage circuit of transformer substation | |
| CN104764952B (en) | A kind of the STATCOM detection platforms and detection method of 10kV voltage class | |
| CN103472393A (en) | Wind turbine power generation set high voltage ride through test system | |
| CN109212389A (en) | A kind of large-capacity power equipment ac voltage withstanding test method | |
| CN108828439A (en) | A kind of emulation of load ratio bridging switch transition resistance failure and diagnostic method and system | |
| CN105259488A (en) | 500kV high-voltage parallel electric reactor turn-to-turn insulation performance testing platform | |
| Schöttke et al. | Transfer characteristic of a MV/LV transformer in the frequency range between 2 kHz and 150 kHz | |
| CN109613374A (en) | A kind of capacitor integrated on-line monitoring method based on redundant data | |
| CN201514437U (en) | Distribution network capacitance current test instrument | |
| CN203287500U (en) | Low voltage ride-through test platform based on parallelly-connected current transformers and voltage-dividing reactors | |
| CN107831378B (en) | Device and method for detecting compensation effect of arc suppression coil | |
| CN110208661A (en) | Offshore boosting station transformer pressure resistance local discharge test method | |
| CN206945842U (en) | A kind of distribution reactive power compensator analogue test platform | |
| CN205157720U (en) | Withstand voltage test system is answered to extra -high voltage neutral point reactor telepresence | |
| CN105866592A (en) | System and method for acquiring dynamic reactive power compensation response waveforms | |
| CN103616581B (en) | The method of without disconnecting power lead test reactive power compensator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |