CN205004977U - A high energy zinc oxide linear resistance and non - linear resistance of high energy zinc oxide combination protection device for making perfect voltage de -excitation - Google Patents
A high energy zinc oxide linear resistance and non - linear resistance of high energy zinc oxide combination protection device for making perfect voltage de -excitation Download PDFInfo
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- CN205004977U CN205004977U CN201520807100.5U CN201520807100U CN205004977U CN 205004977 U CN205004977 U CN 205004977U CN 201520807100 U CN201520807100 U CN 201520807100U CN 205004977 U CN205004977 U CN 205004977U
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- linear resistance
- zinc oxide
- high energy
- rotor
- resistance
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 68
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000001012 protector Effects 0.000 claims description 16
- 230000005347 demagnetization Effects 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000011701 zinc Substances 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000032683 aging Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 230000001629 suppression Effects 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Control Of Eletrric Generators (AREA)
Abstract
The utility model relates to a full application of voltage de -excitation technique in generator excited system, a high energy zinc oxide linear resistance and non - linear resistance of high energy zinc oxide combination protection device for making perfect voltage de -excitation promptly. It include with generating set in the high energy zinc oxide nonlinear resistor protection device that is connected of the positive and negative utmost point of rotor. Still include with generating set in the high energy zinc oxide linear resistance protection device that is connected of the positive and negative utmost point of rotor, its control circuit of high energy zinc oxide linear resistance protection device includes zinc oxide linear resistance R, zinc oxide linear resistance R with parallelly connected after silicon controlled rectifier V1 establish ties with V2, silicon controlled rectifier trigger CF1, CF2 respectively with silicon controlled rectifier V1, V2 parallel connection. Adopt zinc oxide linear resistance to connect in parallel at the non - linear resistance both ends of zinc oxide, then continue release rotor remanence ability, protection rotor safety at the non - linear resistance automatic cut -off simultaneous oxidation zinc linear resistance of zinc oxide.
Description
technical field
The utility model relates to the application of a kind of full voltage demagnetizing technology in generator excited system, namely for high energy ZnO linear resistance and the high energy ZnO nonlinear resistance assembled protector of full voltage demagnetization.
Background technology
In the prior art, current domestic each large and medium generator group mostly adopts znr as the demagnetization dissipative cell of rotor, znr demagnetization is utilized to acquire a great achievement, but also there are some problems simultaneously, because znr conducting voltage is higher, during demagnetization when rotor voltage is lower than znr conduction value, znr becomes high-impedance state after turning off cut-off voluntarily, the portion of energy in rotor is caused to shift, slowly will consume in rotor windings, rotor coil is caused to generate heat, accelerate coil aging, quick de-excitation when being simultaneously also unfavorable for accident reduces causality loss.High energy ZnO linear resistance and the application study of high energy ZnO nonlinear resistance assembled protector full voltage demagnetizing technology in generator excited system still belong to blank at home and abroad.
Utility model content
The purpose of this utility model provides a kind of high energy ZnO linear resistance for full voltage demagnetization and high energy ZnO nonlinear resistance assembled protector for above-mentioned deficiency; solving rotor low-voltage state lower rotor part energy cannot branch problem and realize low-voltage rotor quick de-excitation function; combine with high energy ZnO nonlinear resistance and achieve full voltage demagnetization; achieve and reduce rotor aging speed; Extending Rotor coil useful life; reduce causality loss, eliminate the target of power system security hidden danger comprehensively.
Technical solution of the present utility model is: a kind of high energy ZnO linear resistance for full voltage demagnetization and high energy ZnO nonlinear resistance assembled protector, comprise the high energy ZnO nonlinear resistance protective device be connected with generating set rotor both positive and negative polarity.Also comprise the high energy ZnO linear resistance protective device be connected with generating set rotor both positive and negative polarity; its control circuit of high energy ZnO linear resistance protective device comprises Zinc oxide linear resistance R; Zinc oxide linear resistance R connects with controllable silicon V1 and the V2 after parallel connection, and silicon controlled toggle CF1, CF2 are connected in parallel with controllable silicon V1, V2 respectively.
Zinc oxide linear resistance is commercially product.Zinc oxide linear resistance symbolic animal of the birth year is for znr, and Zinc oxide linear resistance unit can hold larger, and volume is less.Conventional oxidation zinc linear resistance adopts cast iron or alloy material, and take up room so large, insulation property are poor, temperature rise.And Zinc oxide linear resistance assembled protector core parts resistor adopt zinc oxide (ZNO) linear resistance and quartz sand combined.This resistor has transient absorption significant power, noninductive, high pressure resistant, and volume is little, steady performance.Zinc oxide linear resistance valve block is superimposed to be arranged in epoxy bucket, and inside is equipped with quartz sand and is sealed, and the upper and lower two ends of resistor are respectively equipped with electrode.Simple for assembly process, easy for installation, protection range is wide, takes up room little; During use, according to different resistance values and electric current, can be combined flexibly, at random.Zinc oxide linear resistance material, mainly based on zinc oxide, is aided with the materials such as Multimetal oxide and mixes, and shape is sheet.
Znr and Zinc oxide linear resistance assembled protector full voltage demagnetizing technology are exactly the combination by znr and Zinc oxide linear resistance science, constitute a set of more complete field suppression equipment.
Adopt high energy ZnO linear resistance and high energy ZnO nonlinear resistance assembled protector; the linear voltage-current characteristic of high energy ZnO linear resistance is utilized effectively to solve rotor low-voltage state lower rotor part energy trasfer problem and realize low-voltage rotor quick de-excitation function; combine with high energy ZnO nonlinear resistance and achieve full voltage demagnetization; reduce rotor aging speed; Extending Rotor coil useful life, reduce causality loss.That reduces field suppression switch builds arc voltage requirement simultaneously, and what alleviate field suppression switch builds arc voltage power, extends the useful life of switch.
When adopting separately znr demagnetization, rotor voltage is long for die-away time, due to znr pressure-sensitive character, when rotor voltage takes linear resistance conducting voltage lower than zinc oxide, then znr automatic cut-off, rotor current also just ends very soon, rotor dump energy can only slow consumption in rotor windings.
When adopting high energy ZnO linear resistance and high energy ZnO nonlinear resistance assembled protector; rotor voltage is shorter for die-away time; when rotor voltage reduces nonlinear resistance cut-off simultaneously, linear resistance keeps afterflow sustained release decay rotor energy, rotor voltage is down to fast minimum.
Can find out simultaneously, when adopting high energy ZnO linear resistance and high energy ZnO nonlinear resistance assembled protector, field suppression switch to build arc voltage low, what alleviate switch builds arc voltage power, prolongation switch useful life.
The utility model has the advantages that: 1, adopt Zinc oxide linear resistance to be connected in parallel on znr two ends, then continue release rotor residue magnetic energy at znr automatic cut-off simultaneous oxidation zinc linear resistance, protection rotor safety.2, the research of full voltage demagnetizing technology is realized by high energy ZnO linear resistance and high energy ZnO nonlinear resistance assembled protector, separately as the one optimization of rotor discharge resistance to znr, by znr and the common demagnetization energy-absorbing of linear resistance, both voltage-current characteristics are superposed, solving rotor low-voltage state lower rotor part energy cannot branch problem and realize low-voltage rotor quick de-excitation function, combine with high energy ZnO nonlinear resistance and achieve full voltage demagnetization, achieve and reduce rotor aging speed, Extending Rotor coil useful life, reduce causality loss, the target of comprehensive elimination power system security hidden danger.
Below in conjunction with accompanying drawing, execution mode of the present utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory sketch.
Embodiment
See Fig. 1, dotted line frame left side circuit is high energy ZnO nonlinear resistance assembled protector in prior art, and it is connected with the both positive and negative polarity of generating set rotor." Zinc oxide linear resistance assembled protector " for increasing in this programme in dotted line frame, indicates LO1 terminals access generator amature winding "+" end by this device, indicate LO2 terminals access generator amature winding "-" end.
Parts title is as follows: CF1, CF2-silicon controlled toggle, V1, V2-controllable silicon, LQ-rotor windings, R-Zinc oxide linear resistance, divider resistance R1-R4.V1 and V2 is in parallel; CF2 and V2 is connected in parallel, and CF1 and V1 is connected in parallel, and CF2 and R3, R4 are connected in series, and CF1 and R2, R1 are connected in series, and LQ is connected with circuit in parallel
.fR1-znr.
Circuit working principle in dotted line frame: when eliminating magnetism of generator, (controllable silicon jumper operation voltage is 1000V in dotted line frame neutral line resistance R first action, nonlinear resistance voltage limiting value is 1350V), when LQ both end voltage is higher than 1350V, make the conducting pressure limiting completely of nonlinear resistance FR1 moment, after znr FR1 conducting, its internal resistance is very little, much smaller than resistance 2 Ω of Zinc oxide linear resistance R, major part rotor energy discharges through znr FR1, when rotor voltage lower than znr FR1 open value (about 1000V) time, znr FR1 automatic cut-off, rotor remanence continues release by Zinc oxide linear resistance R simultaneously, prevent rotor accelerated ageing, protection rotor safety.
In order to prevent overvoltage timer generation frequent movement, affect Zinc oxide linear resistance R useful life.Zinc oxide linear resistance R adds controllable silicon V1, V2 and trigger equipment CF1, CF2, and the value of opening of design load is determined according to 1000V.In order to increase reliability, two cover controllable silicon jumper and trigger equipments are set.
Znr FR1 and Zinc oxide linear resistance R assembled protector setting parameter: generator excited system parameter and znr FR1 and Zinc oxide linear resistance R assembled protector parameter:
1 rated capacity: 300MW.
2 rated voltages: 18KV.
3 rated current: 11KA.
4 rated power factors: 0.875.
5 rated frequencies: 50HZ.
Exciting voltage during 6 nominal load: 466V.
Exciting current during 7 nominal load: 1696A.
8 off-load excitation voltages: 177V.
9 open-circuit excitation electric current: 939A.
The last 10 magnetic maximum current: 3382A.
11 anode voltages: AC1020V.
12, znr FR1 operation voltage: 1350V.
13, znr FR1 can capacity: 3MJ.
14, Zinc oxide linear resistance R resistance: 2 Ω.
15, Zinc oxide linear resistance R can capacity: 3MJ.
16, silicon controlled toggle trigger voltage value: 1000V.
Describe above, just embodiment of the present utility model, various illustrating is not construed as limiting flesh and blood of the present utility model.
Claims (1)
1. the high energy ZnO linear resistance for full voltage demagnetization and high energy ZnO nonlinear resistance assembled protector, comprise the high energy ZnO nonlinear resistance protective device be connected with generating set rotor both positive and negative polarity, characterized by further comprising the high energy ZnO linear resistance protective device be connected with generating set rotor both positive and negative polarity, its control circuit of high energy ZnO linear resistance protective device comprises Zinc oxide linear resistance R, Zinc oxide linear resistance R connects with controllable silicon V1 and the V2 after parallel connection, silicon controlled toggle CF1, CF2 respectively with controllable silicon V1, V2 is connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807100.5U CN205004977U (en) | 2015-10-19 | 2015-10-19 | A high energy zinc oxide linear resistance and non - linear resistance of high energy zinc oxide combination protection device for making perfect voltage de -excitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807100.5U CN205004977U (en) | 2015-10-19 | 2015-10-19 | A high energy zinc oxide linear resistance and non - linear resistance of high energy zinc oxide combination protection device for making perfect voltage de -excitation |
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| Publication Number | Publication Date |
|---|---|
| CN205004977U true CN205004977U (en) | 2016-01-27 |
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| CN201520807100.5U Active CN205004977U (en) | 2015-10-19 | 2015-10-19 | A high energy zinc oxide linear resistance and non - linear resistance of high energy zinc oxide combination protection device for making perfect voltage de -excitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141207A (en) * | 2015-10-19 | 2015-12-09 | 白山发电厂 | High-energy zinc oxide linear resistor and high-energy zinc oxide nonlinear resistor combined protection device for full voltage de-excitation |
-
2015
- 2015-10-19 CN CN201520807100.5U patent/CN205004977U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141207A (en) * | 2015-10-19 | 2015-12-09 | 白山发电厂 | High-energy zinc oxide linear resistor and high-energy zinc oxide nonlinear resistor combined protection device for full voltage de-excitation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171107 Address after: 132000 Jilin Jilin Huadian Baishan town production complex building Co-patentee after: State Grid Corporation of China Patentee after: Songhua River hydropower generation Co., Ltd. Jilin Baishan power plant Co-patentee after: State Grid Xinyuan Hydropower Co., Ltd. Address before: 132000 No. 10, Shenzhen street, hi tech Zone, Jilin, Jilin Co-patentee before: State Grid Corporation of China Patentee before: Baishan Power Plant Co-patentee before: State Grid Xinyuan Hydropower Co., Ltd. |