CN103715644A - Six-pulse converter valve direct-current device integrating deicing function and SVC function - Google Patents
Six-pulse converter valve direct-current device integrating deicing function and SVC function Download PDFInfo
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- CN103715644A CN103715644A CN201410010237.8A CN201410010237A CN103715644A CN 103715644 A CN103715644 A CN 103715644A CN 201410010237 A CN201410010237 A CN 201410010237A CN 103715644 A CN103715644 A CN 103715644A
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- ice
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- function
- melt
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- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims description 34
- 230000008018 melting Effects 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000007634 remodeling Methods 0.000 description 6
- 210000001367 artery Anatomy 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The invention relates to a six-pulse converter valve direct-current device integrating a deicing function and an SVC function. The device is characterized by comprising a converter, an alternating-current current detector, SVC switches, a long-line deicing switch, a short-line deicing switch, a reactor, a direct-current current detector, a direct-current voltage device and a thyristor valve, wherein switching of the SVC function, a long-line deicing function and a short-line deicing function is achieved by switching the SVC switch, the long-line deicing switch and the short-line deicing switch, and the device has the SVC function, the long-line deicing function and the short-line deicing function. Deicing currents in the deicing function can be adjusted, practicality is high, safe operation of power grids is guaranteed, the SVC function can be used for reactive static compensation of dynamic adjustment, the SVC function is combined with a capacitor set in a switching station to provide reactive power needed by the power grids, and system stability and power transmission capacity are improved.
Description
Technical field
The DC ice melting that the present invention relates to a kind of six pulse conversion valves SVC device of holding concurrently, in the electric power system of this system applies high-capacity direct current de-icing.
Background technology
Along with the expansion of power equipment, transmission line extends, and simultaneously in most areas, often has low-temperature freezing rain and snow disaster, causes the transmission line in electric power system to be subjected to heavy damage, serious impact the normal operation of electrical network.By the summary of a large amount of practical experiences, find that converting alternating current to direct current heats the scheme that realizes ice-melt to icing transmission line, be a kind of practical, cost-effective technical method and measure that prevents that ice damage accident from occurring.Current domestic DC de-icing device, generally adopt uncontrollable diode rectifier bridge cascade, by tandem Regulation Control, export ice melting current, but it is nonadjustable that this kind controlled electric current, although the employing thyristor having, realize electric current adjustable, but only realize ice-melt function, the most of the time idleness of equipment in a year, poor practicability.
Summary of the invention
The DC ice melting that the object of this invention is to provide a kind of six pulse conversion valves SVC device of holding concurrently, has long line ice-melt, short-term ice-melt and SVC function, and ice melting current is adjustable, practical, guarantees electric power netting safe running, improves the stability of a system and ability to transmit electricity.
For achieving the above object, the present invention is achieved through the following technical solutions:
The DC ice melting of the six pulse conversion valves SVC device of holding concurrently, it is characterized in that, comprise transformer, AC current detection device, SVC switch 1～6, long line ice-melt switch, short-term ice-melt switch, ice-melt switch 3 and 4,, reactor 1La, 1Lb, 1Lc, 2La, 2Lb and 2Lc, direct current detection device, DC voltage device and thyristor string V1～V6, transformer is exported a road and is connect SVC switch 1, another road spreading line ice-melt switch; A, the b of SVC switch 1 output, c are after AC current detection device, be connected with reactor 1La, 1Lb, 1Lc, 2La, 2Lb and 2Lc, then by SVC switch 2, short-term ice-melt switch, SVC switch 3 and TCR current sensing means, be connected to anode and the V2 negative electrode of the anode of the anode of thyristor string V1 and V4 negative electrode, V3 and V6 negative electrode, V5; V4 anode, V6 anode, V2 anode are all connected to ice-melt switch 4, through SVC4～6, be connected respectively to V1 negative electrode, V3 negative electrode, V5 negative electrode simultaneously, V1 negative electrode, V3 negative electrode, V5 negative electrode are also connected to ice-melt switch 3, ice-melt switch 3 is through the positive pole of direct current detection device output direct current, the negative pole of ice-melt switch 4 output direct currents, between positive pole and negative pole, be also provided with DC voltage detecting device, positive pole and the negative pole of output direct current are connected to ice-melting mode switching device shifter; Output A, B, C, realize the function to transmission line ice-melt.
Compared with prior art, advantage of the present invention is:
1) DC ice melting of the six pulse conversion valves SVC device of holding concurrently adopts six arteries and veins rectifier valve groups and some diverter switches to form, simple in structure, is convenient to install, and has ice-melt function, has again SVC function, makes system have more practicality.
2) DC ice melting of the six pulse conversion valves SVC device length of DC ice-melting as required of holding concurrently, by control system split close switch, reconstruct, form power line DC ice-melting device, select long line ice-melt function and short-term ice-melt function, improved ice-melt efficiency, the ability that makes transmission line get over ice and snow disaster improves greatly, and then guarantees electric power netting safe running.
3) DC ice melting of six pulse conversion valves is held concurrently SVC device under ice-melt function, control system is according to the ice-melt demand of different circuits in station, export different thyristor Trigger Angles, through six pulse wave converter valve, export different direct currents, for DC ice-melting provides DC ice melting power supply, realize ice-melt function.The adjustable VD of DC ice melting power supply that this device provides, adopts different ice melting currents to the circuit of different wire diameters and length, little to system shock during ice-melt, and the grid switching operation needing is few.
4) DC ice melting of six pulse conversion valves hold concurrently SVC device by control system split close switch, reconstruct, changeable one-tenth SVC device, can be used as the idle static compensation of dynamic adjustments, in conjunction with the former station of switching inner capacitor group, the reactive power that provides electrical network to need, improves the stability of a system and ability to transmit electricity.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is SVC restructuring graph of the present invention;
Fig. 3 is long line ice-melt restructuring graph of the present invention;
Fig. 4 is short-term ice-melt restructuring graph of the present invention;
Embodiment
See Fig. 1, the DC ice melting of the six pulse conversion valves SVC device of holding concurrently, it is characterized in that, comprise transformer, AC current detection device, SVC switch 1～6, long line ice-melt switch, short-term ice-melt switch, ice-melt switch 3 and 4,, reactor 1La, 1Lb, 1Lc, 2La, 2Lb and 2Lc, direct current detection device, DC voltage device and thyristor string V1～V6, transformer is exported a road and is connect SVC switch 1, another road spreading line ice-melt switch; A, the b of SVC switch 1 output, c are after AC current detection device, be connected with reactor 1La, 1Lb, 1Lc, 2La, 2Lb and 2Lc, then by SVC switch 2, short-term ice-melt switch, SVC switch 3 and TCR current sensing means, be connected to anode and the V2 negative electrode of the anode of the anode of thyristor string V1 and V4 negative electrode, V3 and V6 negative electrode, V5; V4 anode, V6 anode, V2 anode are all connected to ice-melt switch 4, through SVC4～6, be connected respectively to V1 negative electrode, V3 negative electrode, V5 negative electrode simultaneously, V1 negative electrode, V3 negative electrode, V5 negative electrode are also connected to ice-melt switch 3, ice-melt switch 3 is through the positive pole of direct current detection device output direct current, the negative pole of ice-melt switch 4 output direct currents, between positive pole and negative pole, be also provided with DC voltage detecting device, positive pole and the negative pole of output direct current are connected to ice-melting mode switching device shifter.Output A, B, C, realize the function to transmission line ice-melt.
See Fig. 2, SVC function remodeling figure of the present invention, by control system, control SVC switch 1～6 closure, all ice-melt switches disconnect, and have just formed SVC function remodeling figure, according to the DC ice melting of the six pulse conversion valves SVC device characteristic of holding concurrently, often connect 2 reactors in mutually, reactor is placed on thyristor valve both sides, and thyristor valve a positive and a negative is in parallel, delta connection.When SVC function, the synchronizing voltage of control system collection site, phased current signal, power network current, send trigger impulse to thyristor after computing, controls TCR electric current, realizes SVC function.
See Fig. 3, long line ice-melt function remodeling figure of the present invention, by control system, control long line ice-melt switch, ice-melt switch 3 and ice-melt switch 4 closures, SVC switch 1～SVC switch 6 and short-term ice-melt switch turn-off, just formed long line ice-melt function remodeling figure, do not access reactor, realize the long line ice-melt function in fixedly ice-melt function of six arteries and veins.
See Fig. 4, short-term ice-melt function remodeling figure of the present invention, by control system, control SVC switch 1, short-term ice-melt switch, ice-melt switch 3 and ice-melt switch 4 closures, SVC switch 2～SVC switch 6 and long line ice-melt switch turn-off, just formed short-term ice-melt function remodeling figure, access reactor 1La, 1Lb, 1Lc, realize the short-term ice-melt function in fixedly ice-melt function of six arteries and veins.
The DC ice melting of the six pulse conversion valves SVC device of holding concurrently switches SVC switch and ice-melt switch by control system, realizes the switching to SVC function, long line ice-melt function and short-term ice-melt function.When SVC function, reactor 1La, 1Lb, 1Lc, 2La, 2Lb connect with thyristor valve group as Controlled Reactor, and control system is controlled the Trigger Angle of thyristor, and then control TCR electric current, realize SVC function; In long line ice-melt function, remove all reactors, the loss in DC ice-melting is reduced, ice melting current is larger, is applicable to long line ice-melt; In short-term ice-melt function, increase by one group of reactor 1La, 1Lb, 1Lc, as smoothing reactor, realize short-term ice-melt function.
The DC ice melting of the six pulse conversion valves SVC device length of DC ice-melting as required of holding concurrently, by control system split close switch, reconstruct, form power line DC ice-melting device, select long line ice-melt function and short-term ice-melt function, improved ice-melt efficiency, the ability that makes transmission line get over ice and snow disaster improves greatly, and then guarantees electric power netting safe running.
The DC ice melting of six pulse conversion valves is held concurrently SVC device under ice-melt function, control system is according to the ice-melt demand of different circuits in station, export different thyristor Trigger Angles, through six pulse wave converter valve, export different direct currents, for DC ice-melting provides DC ice melting power supply, realize ice-melt function.The adjustable VD of DC ice melting power supply that this device provides, adopts different ice melting currents to the circuit of different wire diameters and length, little to system shock during ice-melt, and the grid switching operation needing is few.
The DC ice melting of six pulse conversion valves hold concurrently SVC device by control system split close switch, reconstruct, changeable one-tenth SVC device, can be used as the idle static compensation of dynamic adjustments, in conjunction with the former station of switching inner capacitor group, the reactive power that provides electrical network to need, improves the stability of a system and ability to transmit electricity.
Claims (1)
1. the DC ice melting of the six pulse conversion valves SVC device of holding concurrently, it is characterized in that, comprise transformer, AC current detection device, SVC switch 1～6, long line ice-melt switch, short-term ice-melt switch, ice-melt switch 3 and 4,, reactor 1La, 1Lb, 1Lc, 2La, 2Lb and 2Lc, direct current detection device, DC voltage device and thyristor string V1～V6, transformer is exported a road and is connect SVC switch 1, another road spreading line ice-melt switch; A, the b of SVC switch 1 output, c are after AC current detection device, be connected with reactor 1La, 1Lb, 1Lc, 2La, 2Lb and 2Lc, then by SVC switch 2, short-term ice-melt switch, SVC switch 3 and TCR current sensing means, be connected to anode and the V2 negative electrode of the anode of the anode of thyristor string V1 and V4 negative electrode, V3 and V6 negative electrode, V5; V4 anode, V6 anode, V2 anode are all connected to ice-melt switch 4, through SVC4～6, be connected respectively to V1 negative electrode, V3 negative electrode, V5 negative electrode simultaneously, V1 negative electrode, V3 negative electrode, V5 negative electrode are also connected to ice-melt switch 3, ice-melt switch 3 is through the positive pole of direct current detection device output direct current, the negative pole of ice-melt switch 4 output direct currents, between positive pole and negative pole, be also provided with DC voltage detecting device, positive pole and the negative pole of output direct current are connected to ice-melting mode switching device shifter; Output A, B, C, realize the function to transmission line ice-melt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010237.8A CN103715644A (en) | 2014-01-09 | 2014-01-09 | Six-pulse converter valve direct-current device integrating deicing function and SVC function |
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| CN201410010237.8A CN103715644A (en) | 2014-01-09 | 2014-01-09 | Six-pulse converter valve direct-current device integrating deicing function and SVC function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601013A (en) * | 2014-12-31 | 2015-05-06 | 国家电网公司 | Direct current thawing device |
| CN113131428A (en) * | 2021-05-14 | 2021-07-16 | 南方电网科学研究院有限责任公司 | Variable-frequency controllable current source ice melting device |
-
2014
- 2014-01-09 CN CN201410010237.8A patent/CN103715644A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601013A (en) * | 2014-12-31 | 2015-05-06 | 国家电网公司 | Direct current thawing device |
| CN113131428A (en) * | 2021-05-14 | 2021-07-16 | 南方电网科学研究院有限责任公司 | Variable-frequency controllable current source ice melting device |
| CN113131428B (en) * | 2021-05-14 | 2023-02-28 | 南方电网科学研究院有限责任公司 | Variable-frequency controllable current source ice melting device |
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Application publication date: 20140409 |
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| WD01 | Invention patent application deemed withdrawn after publication |