CN103354362A - Method for solving problem of unstable electrical network caused by experiment - Google Patents
Method for solving problem of unstable electrical network caused by experiment Download PDFInfo
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- CN103354362A CN103354362A CN2013102661076A CN201310266107A CN103354362A CN 103354362 A CN103354362 A CN 103354362A CN 2013102661076 A CN2013102661076 A CN 2013102661076A CN 201310266107 A CN201310266107 A CN 201310266107A CN 103354362 A CN103354362 A CN 103354362A
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- phase
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- transformer
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- intermediate transformer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
To solve problems of serious single-phase impact and three-phase unbalance caused by rated-load short circuit and temperature rise experiments of extra-high voltage and ultra-large capacity single-phase transformers, and problems solved only by a method of adding special-purpose diesel generating sets at present, the invention provides a method for solving a problem of an unstable electrical network caused by the experiment. A voltage regulator is connected with an intermediate transformer, the intermediate transformer is connected with a to-be-tested extra-high voltage and ultra-large capacity transformer, an adjustable inductor is connected between an A phase and a C phase of an output terminal of the voltage regulator in parallel and an adjustable capacitor is connected between a B phase and the C phase in parallel. An adjustable capacitor is connected between the A phase and the B phase in parallel and then is connected with the intermediate transformer. When the intermediate transformer is connected with the to-be-tested extra-high voltage and ultra-large capacity transformer, the adjustable capacitor is connected between the A phase and the B phase in parallel. According to the method, electrical network is stable, structure is simple, cost is low, investment is few and the method brings large economic benefits for society.
Description
Technical field
The present invention relates to electricity field, especially a kind of method that causes the electrical network shakiness of testing that solves.
Background technology
Along with continuing to bring out of the single-phase transformer of extra-high pressure and vast capacity, its nominal load short circuit and temperature rise test are brought serious single-phase impact and three-phase imbalance to electrical network, and cause thus serious mains by harmonics to disturb, even causing the regional power grid paralysis, the phenomenon that other electric equipments can't be worked is fact clear to all.At present, transformer general corresponding way in various countries' is acquired special-purpose diesel generating set exactly at present, but generating set petrol station power station switchyard, reaching land acquisition and factory building is the input of a costliness, this complete equipment certainly will also be wanted supporting a series of regular maintenance personnel.This is a long-term considerable expense, however the only at the trial use of this complete equipment, its usefulness is inevitable low, and in fact this conventional method is the scheme of a kind of high-carbon low-energy-efficiency and high investment.
Summary of the invention
For the serious single-phase impact that causes in the single-phase transformer nominal load short circuit that solves extra-high pressure and vast capacity and the temperature rise test and the problem of three-phase imbalance, the problem that can only adopt at present the method for acquiring special-purpose diesel generating set to solve, the invention provides a kind of method that experiment causes the electrical network shakiness that solves, the not only stabilization of power grids, and effective, less investment is for society brings larger economic interests.
Described a kind of method that experiment causes the electrical network shakiness that solves is characterized in that: connect intermediate transformer behind voltage regulator, connect thereafter tested pair of hypermutation depressor; Wherein, at the alternate controllable impedance in parallel of output terminals A phase and the C of voltage regulator, at the alternate tunable capacitor in parallel with C of B phase, behind the alternate tunable capacitor in parallel with B of A phase, be connected intermediate transformer; When intermediate transformer was connected with tested pair of hypermutation depressor, tunable capacitor was in parallel between A phase and the B.
The invention has the beneficial effects as follows: the not only stabilization of power grids, simple in structure, and also cost is low, and less investment is for society brings larger economic interests.
Description of drawings
Fig. 1 is for solving the schematic diagram of electrical network shakiness; Fig. 2 is equivalent wiring and phasor schematic diagram.
Wherein, 1. voltage regulator; 2. intermediate transformer; 3. tested pair of hypermutation depressor.
Embodiment
As shown in Figure 1,1 connects intermediate transformer 2 behind voltage regulator, connects thereafter tested pair of hypermutation depressor 3; Wherein, at the alternate controllable impedance in parallel of output terminals A phase and the C of voltage regulator 1, at the alternate tunable capacitor in parallel with C of B phase, behind the alternate tunable capacitor in parallel with B of A phase, be connected intermediate transformer 2; When intermediate transformer 2 was connected with tested pair of hypermutation depressor 3, tunable capacitor was in parallel between A phase and the B.
Such as Fig. 1, tested pair of hypermutation depressor 1 place's short-circuit condition, the fine compensation through tunable capacitor can reach cos Φ=1 to prime intermediate transformer 2.Between voltage regulator 2 and tested pair of hypermutation depressor 3, played the matching effect of forming a connecting link.Because there is inductance in intermediate transformer 2, so also be provided with the compensation tunable capacitor at the input of intermediate transformer 2, it almost is pure resistance that the AB end of whole single-phase test load dashed rectangle in Fig. 1 is presented, and equivalent power is P
RP
RIn fact be exactly intermediate transformer 2 with tested pair of hypermutation depressor 3 short circuits after the loss summation.
According to formula (1) proportioning tunable capacitor and controllable impedance:
This moment is for voltage regulator 2 output loads, on-Line Voltage U
BA, U
CB, U
ACConnect in turn respectively P
R, Q
CT, Q
TLAs load.Fig. 2 is arranged, at U
BAConnect the R load, then I
R=I
CBAnd in U
BAHomophase; At U
CBOn meet C
TLoad, then I
CT=I
CB, leading U
CB90 ゜; At U
ACOn meet L
TLoad, then I
LT=I
ACHysteresis U
AC90 ゜; And by formula (1), draw:
(2).
Can be got by formula (2):
As shown in Figure 2, the phasor I that as seen synthesizes
A, I
B, I
CNot only equal and opposite in direction and full symmetric shown in the phasor, and and U
A, U
B, U
CThe complete homophase of phasor is every phase cos Φ=1, has solved the problem that electrical network floats.
Claims (1)
1. one kind solves the method that experiment causes the electrical network shakiness, it is characterized in that: connect intermediate transformer behind voltage regulator, connect thereafter tested pair of hypermutation depressor; Wherein, at the alternate controllable impedance in parallel of output terminals A phase and the C of voltage regulator, at the alternate tunable capacitor in parallel with C of B phase, behind the alternate tunable capacitor in parallel with B of A phase, be connected intermediate transformer; When intermediate transformer was connected with tested pair of hypermutation depressor, tunable capacitor was in parallel between A phase and the B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102661076A CN103354362A (en) | 2013-06-28 | 2013-06-28 | Method for solving problem of unstable electrical network caused by experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102661076A CN103354362A (en) | 2013-06-28 | 2013-06-28 | Method for solving problem of unstable electrical network caused by experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103354362A true CN103354362A (en) | 2013-10-16 |
Family
ID=49310697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102661076A Withdrawn CN103354362A (en) | 2013-06-28 | 2013-06-28 | Method for solving problem of unstable electrical network caused by experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103354362A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040196604A1 (en) * | 2003-04-04 | 2004-10-07 | Tmt & D Corporation | Control system for canceling load unbalance of three-phase circuit |
| CN201637799U (en) * | 2010-04-07 | 2010-11-17 | 蒋光祖 | Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer |
-
2013
- 2013-06-28 CN CN2013102661076A patent/CN103354362A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040196604A1 (en) * | 2003-04-04 | 2004-10-07 | Tmt & D Corporation | Control system for canceling load unbalance of three-phase circuit |
| CN201637799U (en) * | 2010-04-07 | 2010-11-17 | 蒋光祖 | Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer |
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20131016 |