CN104316810B - A kind of D.C. magnetic biasing multistage laddering comprehensive control appraisal procedure - Google Patents
A kind of D.C. magnetic biasing multistage laddering comprehensive control appraisal procedure Download PDFInfo
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Abstract
The invention discloses a kind of D.C. magnetic biasing multistage laddering comprehensive control appraisal procedure, including：Step 1, collects the related data of earthing pole and ground connection website；Step 2, injects small current, obtains the DC current test value of ground connection website from earthing pole to soil；Step 3, the DC current simulation value that ground connection website is calculated using DC current phantom；Step 4, the DC current test value and DC current simulation value adjustment DC current phantom based on ground connection website, and carry out first stage D.C. magnetic biasing improvement；Step 5, injects the small current for incrementally increasing from earthing pole to soil, and observation is administered station abatement equipment action situation, measures testing station DC current, checks ruuning situation and the noise of observation station；Step 6, the DC current simulation value for calculating testing station using DC current phantom adjust DC current phantom；And carry out next stage D.C. magnetic biasing improvement.The present invention calculates simple, accuracy height, efficiency high, practical.
Description
Technical field
The present invention relates to a kind of power system D.C. magnetic biasing Treatment process, more particularly to a kind of D.C. magnetic biasing multistage goes forward one by one
Formula comprehensive control appraisal procedure.
Background technology
DC power transmission line bipolar symmetrical operation under normal circumstances, when then take under line maintenance or failure condition compare through
The one pole of Ji is run to line residual current mode.When the operation of direct current monopolar ground return or DC bipolar unbalanced power, connect
The high potential in earth polar is will act on the earth point to AC network equipment, flows through direct current point in the equipment for making neutral ground
Amount, the transformator for flowing through the neutral ground of larger DC component will produce D.C. magnetic biasing.
D.C. magnetic biasing causes sharply increasing for transformer magnetizing current harmonic, may cause transformer core magnetic saturation,
Cause the magnetostriction of iron core.Simultaneously under periodically variable the action of a magnetic field, stalloy can change size, cause vibration and make an uproar
Sound, and the vibration that magnetostriction is produced is non-sinusoidal waveform, containing multiple harmonic components in the frequency spectrum of transformer noise, and with
The increase of magnetic flux density and increase.The high vibration that D.C. magnetic biasing causes is very serious to the harm of transformator, may cause change
In depressor about part loosening, and then threaten transformator safe operation, thus must take measures limit D.C. magnetic biasing, subtract
The low harm which brings.
The general device for suppressing D.C. magnetic biasing is broadly divided into two kinds：Resistor-type current-limiting apparatus and capacitor type are every straight device.Mesh
Front some electric power enterprise takes above-mentioned D.C. magnetic biasing braking measure both at home and abroad, but these braking measures can only be solved
The problem of certainly indivedual site apparatus.For other do not administer website, other websites for administering website, direct current is particularly closed on
Magnetic bias problem is often more serious, and then often results in electric power enterprise and attend to one thing and lose sight of another, the awkward scene that cannot be taken into account from beginning to end；And
All websites are all administered the tremendous economic that cannot be undertaken, maintenance cost can be brought to whole electric power enterprise again.
So, D.C. magnetic biasing problem of should giving overall consideration to from the angle of power system electric network composition and do not adopt " super
The mode of mark one, improvement one ".But, as the electric pressure of UHVDC Transmission Lines is high, monopolar operation earth current is big
Etc. reason, the D.C. magnetic biasing coverage which causes is often very big, wherein covers a lot of soil-geological condition differences, voltage etc.
Level is different, the transformer station that the method for operation is different, and overall condition is extremely complex, wants to administer by once simulation calculation, a magnetic bias
The D.C. magnetic biasing for solving the problems, such as whole system with regard to thinking accurate and effective is often unpractical.
The direct current for solving the problems, such as D.C. magnetic biasing, needing the multiple transformer stations in comprehensive assessment electrical network for comprehensive, system
Magnetic bias situation and the tolerance of respective main transformer, fully take into account the impact to other websites after website is administered, to reach investment
Minimum, efficiency is maximum, make overall plans, the requirement of comprehensive control.
Content of the invention
Problem present in actual motion is administered for existing power system D.C. magnetic biasing, the invention provides a kind of calculate
Simply, accuracy height, efficiency high, laddering comprehensive control appraisal procedure of practicable D.C. magnetic biasing multistage.
For solving above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of D.C. magnetic biasing multistage laddering comprehensive control appraisal procedure, including step：
Step 1, centered on the earthing pole of direct-current extra-high voltage line, chooses the transforming plant main transformer neutral point in preset range
Ground connection website, collect related data, including：(1) the GPS geographical position of direct-current extra-high voltage line earthing pole and maximum enter ground electricity
Stream, the GPS geographical position of (2) transforming plant main transformer neutral ground website for choosing, earth resistance, type, iron core type and around
The network topology connected mode of transmission line of electricity and straight between the transforming plant main transformer neutral ground website that group D.C. resistance, (3) are chosen
Leakage resistance and (4) soil soil parameter；
Step 2, injects small current from earthing pole to soil, and the DC current of ground connection website is flow through in test, that is, be grounded website
DC current test value；
Step 3, according to the related data that step 1 is collected, in conjunction with electromagnetic field coupled field-circuit method, moment method and FInite Element structure
DC current phantom is built, the DC current simulation value that ground connection website is calculated using DC current phantom；
Step 4, the DC current test value and DC current simulation value based on ground connection website repeatedly adjust current unidirectional current
In stream phantom, soil soil parameter, ground connection website earth resistance, winding D.C. resistance, adopt current direct current after adjusting every time
Current simulations model calculates the DC current simulation value of ground connection website, until DC current test value and DC current simulation value it
Difference is less than the first pre-set current value；
Step 5, in the ground connection website exceeded to DC current, the 110kV of (1) with earthing pole distance less than predeterminable range becomes
Power station, (2) DC current test value carry out D.C. magnetic biasing improvement more than the 500kV transformer stations and 220kV transformer stations of preset value；
Step 6, injects the small current for incrementally increasing from earthing pole to soil, and whether the current abatement equipment for administering station of observation
Action, measures current testing station DC current, checks that ruuning situation and the noise of current observation station, current station of administering go up single order
Section D.C. magnetic biasing carries out the ground connection website of D.C. magnetic biasing improvement in administering, in current testing station i.e. D.C. magnetic biasing improvement on last stage
DC current is exceeded but ground connection website that do not carry out D.C. magnetic biasing improvement, and current observation station is during i.e. D.C. magnetic biasing is administered on last stage
The not exceeded ground connection website of DC current；
Step 7, the DC current simulation value for calculating current testing station using current DC current phantom adjust direct current
In current simulations model, the difference of DC current test value and DC current simulation value is more than the testing station of the second pre-set current value
Electrical parameter, calculates the DC current simulation value of testing station using current DC current phantom after adjusting every time, until straight
The difference of stream testing current value and DC current simulation value is less than the first pre-set current value；
Step 8, cancels earthing pole maximum and becomes a mandarin still not operating abatement equipment under electric current, cancel the improvement station of abatement equipment
Become testing station；The testing station exceeded to DC current adds abatement equipment, and the testing station of additional abatement equipment becomes to be controlled
Reason station；To shake substantially and the exceeded observation station of noise is used as testing station；
Step 9, repeat step 6～8 is until the DC current test value of all current testing stations is up to standard.
Combination electromagnetic field coupled field-circuit method, moment method described in step 3 and FInite Element build DC current emulation mould
Type is realized using CDGES software tools.
Step 4 further includes sub-step：
4.1 judge whether the difference of the DC current test value and DC current simulation value that are grounded website is default electric less than first
Flow valuve, if so, execution step 5；Otherwise, sub-step 4.2 is executed；
Soil soil parameter, ground connection website earth resistance, direct current electricity in the current DC current phantom of 4.2 adjustment
Resistance, with the DC current phantom after adjustment as current DC current phantom；
The 4.3 DC current simulation values for calculating ground connection website using current DC current phantom, then, execution step
4.1.
It is to arrange electric capacity every straight abatement equipment or resistance current limliting abatement equipment that D.C. magnetic biasing described in step 5 is administered.
Step 7 further includes sub-step：
Whether the difference of the 7.1 DC current test values and DC current simulation value for judging current testing station is preset less than first
Current value, if so, execution step 8；Otherwise, sub-step 7.2 is executed；
In the 7.2 current DC current phantoms of adjustment, the differences of DC current test value and DC current simulation value are more than the
The electrical parameter of the current testing station of two pre-set current values；
The 7.3 DC current simulation values for calculating current testing station using current DC current phantom, then execute step
Rapid 7.1.
When the operation of direct current monopolar ground return or DC bipolar unbalanced power, the high potential of earthing pole will act at
On earth point to AC network equipment, in the equipment for making neutral ground, DC component is flow through, flow through larger DC component
The transformator of neutral ground will produce D.C. magnetic biasing, and then the stable operation to transformator causes larger harm.Current electric power
Enterprise often takes the mode of " exceeded, administer " during D.C. magnetic biasing is administered, rather than make overall plans, comprehensive
Close and administer, sometimes exacerbate the D.C. magnetic biasing situation of periphery website on the contrary.And D.C. magnetic biasing General Influence scope is larger, so
Cause regulation effect not good, it is difficult to be suppressed D.C. magnetic biasing comprehensively, and very big waste can be caused to resource.
Compared to the prior art, the present invention has following advantage：
Calculate simple, accuracy height, efficiency high, practical.
Description of the drawings
Fig. 1 is the overall flow schematic diagram of the inventive method；
Fig. 2 is the idiographic flow schematic diagram of the inventive method；
Fig. 3 is the idiographic flow schematic diagram of segmentation small current test in the inventive method.
Specific embodiment
The inventive method is comprised the following steps that：
Step 1, investigation receive money：
Centered on direct-current extra-high voltage line earthing pole, choose in the centre distance no more than transforming plant main transformer of 150km
Property point ground connection website, and collect the related data of direct-current extra-high voltage line earthing pole and transforming plant main transformer neutral ground website.
Related data includes：The GPS geographical position of direct-current extra-high voltage line earthing pole, direct-current extra-high voltage line earthing pole maximum enter ground electricity
Stream, the GPS geographical position of transformer station, the earth resistance of transformer station, the type of main transformer, the type of master iron core, main transformer winding
The network topology connected mode of transmission line of electricity, the D.C. resistance of transmission line of electricity between D.C. resistance, website, it is not more than from centre distance
The soil soil property situation of 150km scopes；The type of main transformer includes self coupling becomes, circle becomes etc.；The type of master iron core includes three-phase five
Pillar, three-phase three-limb etc.；Soil soil property situation refers to soil resistivity delamination.
Step 2, small current are tested：
Small current is injected in from direct-current extra-high voltage line earthing pole to soil, and is tested and flow through in the transforming plant main transformer of selection
Property point be grounded the DC current of website, i.e. the DC current test value of transforming plant main transformer neutral ground website.Small current is single
The 10～90% of real work electric current when pole is run, are originally embodied as small current using 500A electric currents.
Keep experimental condition constant in the case of, flow through the DC current of transforming plant main transformer neutral ground website with straight
The earth current of stream extra high voltage line earthing pole is directly proportional, therefore can be by the unidirectional current of transforming plant main transformer neutral ground website
Current test value obtains neutral point of main transformer DC component during direct-current extra-high voltage line monopolar operation, and then judges whether to need to becoming
Power station neutral point of main transformer ground connection website carries out D.C. magnetic biasing improvement.
Step 3, preliminary emulation：
The direct-current extra-high voltage line earthing pole that is collected according to step 1 and the related money of transforming plant main transformer neutral ground website
Material, writes earth mat and transmission line of electricity coordinate using matlab, related data, earth mat and transmission line of electricity coordinate is imported CDGES soft
Part instrument, combines electromagnetic field coupled field-circuit method, moment method and FInite Element in CDGES software tools and builds phantom, adopt
The DC current simulation value that transforming plant main transformer neutral ground website is calculated with phantom.
Step 4, compares the DC current test value and DC current simulation value of transforming plant main transformer neutral point, according to comparing knot
Fruit adjustment DC current phantom, and carry out first stage D.C. magnetic biasing improvement：
DC current test value and DC current simulation value according to transforming plant main transformer neutral point adjusts DC current emulation
Model, i.e., main adjustment include soil soil property, the earth resistance of transforming plant main transformer neutral ground website, winding D.C. resistance etc.
Parameter.As in the related data of collection in step 1, data are not necessarily accurate, it is therefore desirable to according to simulation result to DC current
Phantom calculates the parameter being related to and is adjusted.
DC current simulation value according to transforming plant main transformer neutral point carries out first stage D.C. magnetic biasing improvement, D.C. magnetic biasing
Administering includes that electric capacity is administered and resistance current limliting improvement two schemes every straight, and first stage D.C. magnetic biasing is administered i.e. to extra-high with direct current
Line ball road earthing pole distance is less than the 110kV transformer stations of predeterminable range value and the 500kV power transformations that DC current test value is larger
Stand and 220kV transformer stations carry out electric capacity and administer or the improvement of resistance current limliting every straight.
Step 5, segmentation small current are tested：
After completing D.C. magnetic biasing improvement on last stage, incrementally increasing small current carries out small current test again, i.e., from direct current
Extra high voltage line earthing pole injects the small current for incrementally increasing in soil, and whether the current abatement equipment for administering station of observation is moved
Make, measure the neutral point direct current component and equipment running noises of testing station, make an inspection tour the machine operation and noise of observation station.
The each transforming plant main transformer neutral ground website for administering step through first stage D.C. magnetic biasing is divided into by the present invention
Three classes：(1) station is administered：D.C. magnetic biasing takes the website of control measures in administering on last stage；(2) testing station：According to upper single order
Section simulation result prediction D.C. magnetic biasing risk is larger but website that do not take control measures；(3) observation station：According to imitating on last stage
The less website of true prediction of result D.C. magnetic biasing risk.
Step 6, further adjusts DC current phantom, and carries out D.C. magnetic biasing improvement：
The DC current simulation value that transforming plant main transformer neutral ground website is calculated using current DC current phantom,
DC current test value and DC current simulation value according to testing station adjusts DC current phantom, this main pin of adjustment
The transforming plant main transformer under the conditions of the nonuniform soil of pole larger to DC current test value and DC current simulation value gap
The relevant parameter of neutral ground website, such as high mountain, lake etc.；And carry out the improvement of this stage D.C. magnetic biasing：Cancel in direct current
Extra high voltage line earthing pole maximum becomes a mandarin still not operating abatement equipment under electric current, and the improvement station for cancelling abatement equipment is become
Testing station；The testing station of centering point DC component exceeded (there is larger D.C. magnetic biasing risk) adds abatement equipment, adds
The testing station of abatement equipment becomes improvement station；To observe during tour and shake the obvious and exceeded observation station of noise, make
Which is used as testing station.
Step 7, repeat step 5～6 is up to all transforming plant main transformer neutral ground websites in the test of segmentation small current
DC current test value is up to standard.
With reference to embodiment, the present invention is described in detail.The present embodiment carries out reality premised on technical solution of the present invention
Apply, give detailed real-time mode and specific operating process, but protection scope of the present invention is not limited to following embodiments.
Embodiment
Administered transformer station includes that small stream Luo Du left bank Jinhua, Zhejiang ± 800 kilovolt extra-high voltage direct-current transmission engineering Jinhua connects
The transformer station of circumpolar 98 different electric pressures, wherein comprising 14 500kV transformer stations, 56 220kV transformer stations and
28 110kV transformer stations.
Step 1, collects the related data of the transforming plant main transformer neutral ground website of 98 different electric pressures；
Step 2～3, from direct-current extra-high voltage line earthing pole to soil in inject 500A electric currents, due to condition limit, this reality
Apply example to be tested from selected section website in neighbouring 98 transformer stations, and the related data according to step 1 collection and test number
According to phantom is set up, 1 is shown in Table.
Table 1
22 websites in table 1 are carried out first stage D.C. magnetic biasing improvement according to data in table 1 by step 4：Dan Xi is become,
Square rock becomes, river sun becomes, flower street changes, Ni Zhaibian, double dragons become, hot spring becomes, lustrous and transparent township becomes, Jinhua becomes, everything becomes, letter peace becomes, the change of phoenix instrument,
Wu Ning changes, the change of sesame weir, all sorts of flowers change, west pottery change, Huang Cunbian, Lishui change, Shi Jinbian, Feng Anbian, HUANGLONG change, the change of lower margin carry out electric capacity
Every straight improvement.
Step 5, after completing the improvement of step 4 D.C. magnetic biasing, carries out segmentation small current test, in the case of different earth currents
The abatement equipment action situation of each improvement website is observed, and tests other neutral point direct current components for not administering website, tested
The results are shown in Table 2～3.
Table 2 is every straight station action information slip
DC magnetic bias current table under 3 different earth currents of table
Step 6, according to the modified result model of second test, and proposes the resolution of second stage：Due to all
The in test all actions of first stage abatement equipment, so in the case where keeping original abatement equipment constant, to Zhu Yunbian,
11 changes such as maple becomes, peaceful change, Dongshan change, Wan Songbian, Jiande becomes, celestial being all becomes, celestial bridging, deer field becomes, big unit becomes, Xia Jin becomes
Power station carries out electric capacity every straight process；Paulownia crane is become carries out resistance current limliting process.
Step 7, tests to second stage resolution, observes each improvement website in the case of different earth currents
Abatement equipment action situation, and other neutral point direct current components for not administering website are tested, result of the test is shown in Table 4～6.
Table 4 is every straight station action information slip
5 current limliting station action information slip of table
DC magnetic bias current table under 6 different earth currents of table
And according to above-mentioned experiment, simulation result, on the first two stage control measures basis, then to deep marsh change, Jiang Wan
Becoming carries out electric capacity every straight process；The official pool becomes, Dongyang becomes, Ling Dong becomes, board head becomes, blue or green field changes, inner grand change, Hu Zhen changes, the Yanmen Gate become into
The process of row resistance current limliting, defines the final resolution to Quzhou City.The program is run so far, real-time by office of prefectures and cities
The website in respective section is supervised, more serious D.C. magnetic biasing problem is not yet found at present, D.C. magnetic biasing regulation effect is good.
It is to illustrate the present invention described in above-described embodiment, though illustrated by specific term in text, not
Protection scope of the present invention can be limited with this, the personage for being familiar with this technical field can be right after the spirit of understanding this patent with principle
Which is changed or is changed and reach equivalent purpose, and this equivalent change and modification, should all be covered by right institute circle
Determine in category.
Claims (5)
1. laddering comprehensive control appraisal procedure of a kind of D.C. magnetic biasing multistage, it is characterised in that including step：
Step 1, centered on the earthing pole of direct-current extra-high voltage line, chooses connecing for the transforming plant main transformer neutral point in preset range
Ground website, collects related data, geographic position data, type including the ground connection website of (1) earthing pole and selection, electricity ginseng
Number, network topology, and (2) soil soil parameter；
Step 2, injects small current from earthing pole to soil, and the DC current of ground connection website is flow through in test, i.e., ground connection website is straight
Stream testing current value, the 10～90% of real work electric current when described small current is monopolar operation；
Step 3, according to the related data that step 1 is collected, builds in conjunction with electromagnetic field coupled field-circuit method, moment method and FInite Element straight
Stream current simulations model, the DC current simulation value that ground connection website is calculated using DC current phantom；
Step 4, the DC current test value and DC current simulation value based on ground connection website repeatedly adjust current DC current and imitate
In true mode, soil soil parameter, ground connection website earth resistance, winding D.C. resistance, adopt current DC current after adjusting every time
Phantom calculates the DC current simulation value of ground connection website, until the difference of DC current test value and DC current simulation value is little
In the first pre-set current value；
Step 5, in the ground connection website exceeded to DC current (1) and earthing pole distance less than predeterminable range 110kV transformer stations,
(2) DC current test value carries out D.C. magnetic biasing improvement more than the 500kV transformer stations and 220kV transformer stations of preset value；
Step 6, injects the small current for incrementally increasing from earthing pole to soil, and whether the current abatement equipment for administering station of observation is moved
Make, measure current testing station DC current, check ruuning situation and the noise of current observation station, current improvement station is i.e. on last stage
D.C. magnetic biasing carries out the ground connection website of D.C. magnetic biasing improvement in administering, straight in current testing station i.e. D.C. magnetic biasing improvement on last stage
Stream electric current is exceeded but ground connection website that do not carry out D.C. magnetic biasing improvement, and current observation station is straight during i.e. D.C. magnetic biasing is administered on last stage
The not exceeded ground connection website of stream electric current；
Step 7, the DC current simulation value for calculating current testing station using current DC current phantom adjust DC current
Electricity of the difference of DC current test value and DC current simulation value more than the testing station of the second pre-set current value in phantom
Parameter, calculates the DC current simulation value of testing station using current DC current phantom after adjusting every time, until unidirectional current
The difference of current test value and DC current simulation value is less than the first pre-set current value；
Step 8, cancel earthing pole maximum and become a mandarin still not operating abatement equipment under electric current, cancels the improvement station of abatement equipment
For testing station；The testing station exceeded to DC current adds abatement equipment, and the testing station for adding abatement equipment becomes improvement station；
To shake substantially and the exceeded observation station of noise is used as testing station；
Step 9, repeat step 6～8 is until the DC current test value of all current testing stations is up to standard.
2. D.C. magnetic biasing multistage as claimed in claim 1 laddering comprehensive control appraisal procedure, it is characterised in that：
Combination electromagnetic field coupled field-circuit method, moment method described in step 3 and FInite Element build DC current phantom and adopt
Realized with CDGES software tools.
3. D.C. magnetic biasing multistage as claimed in claim 1 laddering comprehensive control appraisal procedure, it is characterised in that：
Step 4 further includes sub-step：
Whether 4.1 judge the difference of the DC current test value and DC current simulation value that are grounded website less than the first predetermined current
It is worth, if so, execution step 5；Otherwise, sub-step 4.2 is executed；
Soil soil parameter, ground connection website earth resistance, winding D.C. resistance in the current DC current phantom of 4.2 adjustment,
With the DC current phantom after adjustment as current DC current phantom；
The 4.3 DC current simulation values for calculating ground connection website using current DC current phantom, then, execution step 4.1.
4. D.C. magnetic biasing multistage as claimed in claim 1 laddering comprehensive control appraisal procedure, it is characterised in that：
It is to arrange electric capacity every straight abatement equipment or resistance current limliting abatement equipment that D.C. magnetic biasing described in step 5 is administered.
5. D.C. magnetic biasing multistage as claimed in claim 1 laddering comprehensive control appraisal procedure, it is characterised in that：
Step 7 further includes sub-step：
Whether the difference of the 7.1 DC current test values and DC current simulation value for judging current testing station is less than the first predetermined current
It is worth, if so, execution step 8；Otherwise, sub-step 7.2 is executed；
In the current DC current phantom of 7.2 adjustment, the difference of DC current test value and DC current simulation value is pre- more than second
If the electrical parameter of the current testing station of current value；
7.3 adopt current DC current phantom to calculate the DC current simulation values of current testing station, then execution step
7.1.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105468874A (en) * | 2015-12-25 | 2016-04-06 | 国网甘肃省电力公司 | Field-circuit coupling modeling method for alternating current power grid |
| CN106199274B (en) * | 2016-07-21 | 2021-02-23 | 国家电网公司 | Direct-current magnetic bias treatment site selection method |
| CN108647438B (en) * | 2018-05-10 | 2021-07-30 | 四川大学 | Soil equivalent resistance model modeling method |
| CN109873346B (en) * | 2019-02-01 | 2020-08-18 | 南方电网科学研究院有限责任公司 | DC power transmission common grounding electrode system maintenance method and device |
| CN114624535A (en) * | 2022-03-22 | 2022-06-14 | 国网江西省电力有限公司电力科学研究院 | DC magnetic biasing risk assessment system and method under power transformer load state |
| CN114624492B (en) * | 2022-04-22 | 2023-04-07 | 西南交通大学 | Method for measuring potential difference of two remote transformer substation ground grids caused by direct current |
| CN115189480B (en) * | 2022-09-08 | 2022-12-09 | 国网江西省电力有限公司电力科学研究院 | Transformer self-adaptive direct-current magnetic bias adjusting system and method based on multi-source coordination |
| CN117350102A (en) * | 2023-09-20 | 2024-01-05 | 国网上海市电力公司 | Subway electric power system management method, device, equipment and readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203324409U (en) * | 2013-07-11 | 2013-12-04 | 国家电网公司 | Transformer DC bias magnet fault simulation structure |
| CN103439605A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Method for detecting transformer direct-current magnetic bias capacity |
| CN103514320A (en) * | 2013-07-25 | 2014-01-15 | 国家电网公司 | Method for simulating direct current magnetic biasing of transformer in multi-direct-current-drop-point region |
| CN103593523A (en) * | 2013-11-12 | 2014-02-19 | 国网上海市电力公司 | Finite element theory based direct current magnetic bias suppression method under condition of multiple direct-current falling points |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006093405A (en) * | 2004-09-24 | 2006-04-06 | Matsushita Electric Works Ltd | High-voltage generator and head light lighting device |
-
2014
- 2014-11-21 CN CN201410674457.0A patent/CN104316810B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203324409U (en) * | 2013-07-11 | 2013-12-04 | 国家电网公司 | Transformer DC bias magnet fault simulation structure |
| CN103514320A (en) * | 2013-07-25 | 2014-01-15 | 国家电网公司 | Method for simulating direct current magnetic biasing of transformer in multi-direct-current-drop-point region |
| CN103439605A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Method for detecting transformer direct-current magnetic bias capacity |
| CN103593523A (en) * | 2013-11-12 | 2014-02-19 | 国网上海市电力公司 | Finite element theory based direct current magnetic bias suppression method under condition of multiple direct-current falling points |
Non-Patent Citations (2)
| Title |
|---|
| 变压器直流偏磁的仿真研究及限制措施;皇甫成 等;《高电压技术》;20060930;第32卷(第9期);第117-120页 * |
| 多直流接地***单极运行对沪西特高压变电站直流偏磁的影响;段炼 等;《电网技术》;20140131;第38卷(第1期);第132-137页 * |
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