CN201623436U - Direct-current ice melting device capable of being multiplexed into TSC - Google Patents
Direct-current ice melting device capable of being multiplexed into TSC Download PDFInfo
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- CN201623436U CN201623436U CN2009201854831U CN200920185483U CN201623436U CN 201623436 U CN201623436 U CN 201623436U CN 2009201854831 U CN2009201854831 U CN 2009201854831U CN 200920185483 U CN200920185483 U CN 200920185483U CN 201623436 U CN201623436 U CN 201623436U
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Abstract
The utility model discloses a direct-current ice melting device capable of being multiplexed into a TSC, which consists of a circuit breaker, a wire inlet reactor, a direct-current flat wave reactor, a compensating capacitor, pluralities of isolating switches and a power switch module. The single power switch module consists of an equalizing resistor, a damping resistor, a damping capacitor and a thyristor. Through changing states of G1-G8 switches, the direct-current ice melting device can be utilized as a fully controlled rectification bridge to be used for direct-current ice melting according to field requirements, and can also be utilized as a thyristor switched capacitor TSC to be used for dynamic reactive power compensation. The direct-current ice melting device expands a single function, and can be used for dynamic reactive power compensation in a non-ice-melting state, thereby avoiding idling at most of time and increasing equipment utilization and cost performance. Moreover, the device utilized as a reactive power compensation device is always in an operation state on normal conditions, and is simpler in daily maintenance and test and higher in reliability when compared with use periodicity of single ice-melting equipment.
Description
Technical field
The utility model relates to power electronics and uses the equipment technology field, and particularly a kind of reusable is the DC de-icing device of TSC.
Background technology
Powerline ice-covering and accumulated snow can cause tripping operation, the broken string of circuit, the accidents such as bar, conductor galloping, insulator arc-over, communication disruption and large-area power-cuts of falling.Countries such as America and Europe, Asia all once because of powerline ice-covering causes security incident, have brought enormous economic loss, and China also deeply hurts.Therefore the ice and snow disaster becomes the electrical network of the many countries in the whole world and the common issue with of facing.Since the forties in 20th century, the threat of freezing disaster is the big technical barrier that electric power system for more than half a century, industrial quarters and academia do one's utmost to tackle always, and studying practicable de-icing technology and equipment is the project with most important theories meaning and realistic price.
The de-icing technology that electric energy is converted into heat energy is one of main deicing means, and from domestic and international state-of-the art, " ac short circuit ice-melt " and " direct current ice-melting method " is two kinds of ice-melt means of mature and feasible the most.Compare with " on-load ice-melting method " with " changing trend distribution ice-melt ", use " ac short circuit ice-melting method " and " direct current ice-melting method " to adjust to shut down condition to circuit, though lost the part ability to transmit electricity, but can thoroughly melt the circuit icing, guarantee the safe and stable operation of electrical network.
Transmission line adopts traditional ac short circuit de-icing method, be subjected to the restriction of lead maximum permissible current, usually need many circuits of series connection to carry out impedance matching, cause many line outages, and the series connection of many circuits, to the reactance of DC ice-melting be increased greatly, required ice-melt capacity also increases greatly, is unfavorable for the power-balance in the electrical network.Ice-melting method is different with exchanging, and under certain environmental condition, the needed power supply capacity of DC ice melting only depends on the unit D.C. resistance and the conductor length of DC ice-melting, is not subjected to the anti-influence of line alternating current, and required power supply capacity can reduce greatly.Obtaining on the basis of cost performance preferably, according to the actual conditions of electrical network ice-melt, can be designed to movable type or fixed DC ice-melt equipment, use operation more flexible; Under the stable prerequisite of ac power supply, the circuit of DC ice melting method series connection is less, reduced the loss of outage of ice-melt, help the stability and safety operation of electrical network, deficiency such as many, the load transfer difficulty of operation in the time of can avoiding in the past exchanging impedance matching difficulty that de-icing technology exists, ice-melt, ice-melt when realizing many circuits of the whole network and changeable power station can adapt to present electrical network 220kV and following transformer station and line ice-melting needs preferably.
Consider that the circuit icing mainly is because climate reasons is caused, so the use of deicing device has very strong periodicity, just competence exertion effectiveness in the special time period in the winter time.If the effect of deicing device is more single, then its cost performance will be very poor, is unfavorable for applying, and owing to long-term no power, the reliability of device will descend simultaneously, and also will there be certain difficulty in its daily maintenance.
Summary of the invention
The purpose of this utility model is: provide the DC de-icing device that a kind of reusable is TSC, both can be used as the full-controlled rectifier bridge according to on-the-spot needs and be used for the circuit DC ice melting, also can be used as thyristor switchable capacitor TSC and be used for dynamic passive compensation, thereby effectively improve usage ratio of equipment.
The utility model is realized by following scheme: comprise circuit breaker, the inlet wire reactor, dc flat-wave reactor, compensation condenser, first three-phase isolation switch, second three-phase isolation switch, the 3rd three-phase isolation switch, the 4th three-phase isolation switch, the 5th three-phase isolation switch, the 6th three-phase isolation switch, the 7th three-phase isolation switch, the 8th three-phase isolation switch and by the first power switch module, the second power switch module, the 3rd power switch module, the 4th power switch module, the 5th power switch module, the three-phase brachium pontis that the 6th power switch module is formed, circuit breaker directly inserts three phase mains, insert the inlet wire reactor, then be connected with the three-phase brachium pontis that the power switch module constitutes thereafter; A phase and B that the A of first three-phase isolation switch is in the three-phase bridge arm mutually go up between the brachium pontis mutually, and B phase and C that B is in the three-phase bridge arm mutually go up between the brachium pontis mutually, and C links to each other with the cathode output end of three-phase brachium pontis; The A of second three-phase isolation switch and the A of three-phase bridge brachium pontis parallel connection mutually, the B brachium pontis parallel connection mutually of B and three-phase bridge, the C brachium pontis parallel connection mutually of C and three-phase bridge; A phase and B that the A of the 3rd three-phase isolation switch is in the three-phase bridge arm mutually descend between the brachium pontis mutually, and B phase and C that B is in the three-phase bridge arm mutually descend between the brachium pontis mutually, and C links to each other with the cathode output end of three-phase brachium pontis; The negative pole of brachium pontis links to each other under the 4th three-phase isolation switch and the three-phase bridge, connects three-phase compensation capacitor thereafter again, the other end three-phase short circuit of three-phase compensation capacitor; The C of first three-phase isolation switch links to each other with dc flat-wave reactor, the other end of dc flat-wave reactor links to each other with second lead-out terminal with first lead-out terminal of output cathode, the C of the 3rd three-phase isolation switch be connected first cathode output end and second cathode output end of output negative pole, wherein second lead-out terminal links to each other with positive pole by the 7th three-phase isolation switch, first cathode output end links to each other with negative pole by the 8th three-phase isolation switch, link to each other by the 5th three-phase isolation switch between first lead-out terminal and first cathode output end, link to each other by the 6th three-phase isolation switch between second lead-out terminal and second cathode output end; Positive pole has two lead-out terminals during ice-melt: first lead-out terminal and second lead-out terminal, negative pole has two lead-out terminals: first cathode output end and second cathode output end, wherein second lead-out terminal links to each other with positive pole by the 7th three-phase isolation switch, first cathode output end links to each other with negative pole by the 8th three-phase isolation switch, link to each other by the 5th three-phase isolation switch between first lead-out terminal and first cathode output end, link to each other by the 6th three-phase isolation switch between second lead-out terminal and second cathode output end; A, B, C three-phase line are connected to respectively: first lead-out terminal, second lead-out terminal and first cathode output end, and the break-make by the 5th～the 8th three-phase isolation switch need to select each phase circuit of ice-melt; The 5th three-phase isolation switch, the 6th three-phase isolation switch closure, the 7th three-phase isolation switch, the 8th three-phase isolation switch mainly melt B phase circuit when disconnecting; The 6th three-phase isolation switch, the 8th three-phase isolation switch closure, the 5th three-phase isolation switch, the 7th three-phase isolation switch mainly melt A phase circuit when disconnecting; The 7th three-phase isolation switch, the 8th three-phase isolation switch closure, the 5th three-phase isolation switch, the 6th three-phase isolation switch mainly melt C phase circuit when disconnecting; When closed and second three-phase isolation switch of first three-phase isolation switch on the brachium pontis, the 3rd three-phase isolation switch, when the 4th three-phase isolation switch disconnects, device as the operation of full control 6 pulse wave rectifier bridges in order to the DC ice melting power supply to be provided; When closed and first three-phase isolation switch of second three-phase isolation switch on the brachium pontis, the 4th three-phase isolation switch, when the 3rd three-phase isolation switch disconnects, device as the thyristor switchable capacitor operation in order to the dynamic compensation reactive power.
Each power switch module described in the utility model is made up of grading resistor, damping resistance, damping capacitor and thyristor, 1～15 power switch module series connection constitutes single-phase brachium pontis, the grading resistor static state voltage equipoise that is used in parallel with thyristor, damping resistance and damping capacitor series connection back are in parallel with thyristor.
Inlet wire reactor described in the utility model adopts air core reactor.
The beneficial effects of the utility model are: expanded the simple function of DC de-icing device, made it can carry out dynamic passive compensation under non-ice-melt state, avoided device leaving unused under most time, improved utilization rate of equipment and installations and cost performance.Because the normal condition lower device is in running status all the time as reactive power compensator, with respect to the periodicity that single ice-melt equipment uses, the utility model regular maintenance is relative more simple with test on the other hand, and reliability is also higher.
Description of drawings
Fig. 1 is the utility model main circuit structure schematic diagram.
Fig. 2 is the schematic diagram that the utility model carries out A phase line ice-melting when moving as DC de-icing device.
Fig. 3 is the schematic diagram that the utility model carries out B phase line ice-melting when moving as DC de-icing device.
Fig. 4 is the schematic diagram that the utility model carries out C phase line ice-melting when moving as DC de-icing device.
Fig. 5 is the schematic diagram of the utility model when moving as dynamic compensating device TSC.
Embodiment
The technical scheme that its technical problem that solves the utility model adopts is: device is made of circuit breaker, inlet wire reactor, dc flat-wave reactor, compensation condenser, a plurality of isolating switch and the three-phase brachium pontis be made up of a plurality of power switch modules.
Single power switch module described in the utility model is made up of grading resistor, damping resistance, damping capacitor and thyristor, and 1～15 power switch module series connection constitutes single-phase brachium pontis.The grading resistor static state voltage equipoise that is used in parallel with thyristor, damping resistance are connected with damping capacitor, and the back is in parallel with thyristor to be used to eliminate dynamic overvoltage.
Inlet wire reactor described in the utility model adopts air core reactor, strobes during ice-melt, in order to the normal operation of protection thyristor, forms the capacitive compensation branch road jointly with compensation condenser during reactive power compensation, shoving during in order to the elimination switching.
The utility model has been expanded the simple function of DC de-icing device, makes it can carry out dynamic passive compensation under non-ice-melt state, has avoided device leaving unused under most time, has improved utilization rate of equipment and installations and cost performance.Because the normal condition lower device is in running status all the time as reactive power compensator, with respect to the periodicity that single ice-melt equipment uses, the utility model regular maintenance is relative more simple with test on the other hand, and reliability is also higher.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the utility model is elaborated.
Referring to Fig. 1, be depicted as the utility model main circuit structure schematic diagram.Device is by circuit breaker DL1, inlet wire reactor L1, dc flat-wave reactor L2, compensation condenser C1, first three-phase isolation switch (G1), second three-phase isolation switch (G2), the 3rd three-phase isolation switch (G3), the 4th three-phase isolation switch (G4), the 5th three-phase isolation switch (G5), the 6th three-phase isolation switch (G6), the 7th three-phase isolation switch (G7), the 8th three-phase isolation switch (G8) and by first power switch module THAZ1～THAZn, second power switch module THAF1～THAFn, the 3rd power switch module THBZ1～THBZn, the 4th power switch module THBF1～THBFn, the 5th power switch module THCZ1～THCZn, the three-phase brachium pontis that the 6th power switch module THCF1～THCFn forms constitutes.A, B, C inlet wire insert three-phase alternating-current supply via circuit breaker DL1, serial connection inlet wire reactor L1, and circuit breaker DL1 directly inserts three phase mains, inserts inlet wire reactor L1 thereafter, then is connected with the three-phase brachium pontis that the power switch module constitutes; A phase and B that the A of the first three-phase isolation switch G1 is in the three-phase bridge arm mutually go up between the brachium pontis mutually, and B phase and C that B is in the three-phase bridge arm mutually go up between the brachium pontis mutually, and C links to each other with the cathode output end of three-phase brachium pontis; The A of the second three-phase isolation switch G2 and the A of three-phase bridge brachium pontis parallel connection mutually, the B brachium pontis parallel connection mutually of B and three-phase bridge, the C brachium pontis parallel connection mutually of C and three-phase bridge; A phase and B that the A of the 3rd three-phase isolation switch G3 is in the three-phase bridge arm mutually descend between the brachium pontis mutually, and B phase and C that B is in the three-phase bridge arm mutually descend between the brachium pontis mutually, and C links to each other with the cathode output end of three-phase brachium pontis.The negative pole of brachium pontis links to each other under the 4th three-phase isolation switch G4 and the three-phase bridge, connects three-phase compensation capacitor C1 thereafter again, the other end three-phase short circuit of three-phase compensation capacitor C1.The C of the first three-phase isolation switch G1 links to each other with dc flat-wave reactor L2, the other end of dc flat-wave reactor L2 links to each other with the second lead-out terminal ZO2 with the first lead-out terminal ZO1 of output cathode, the C of the 3rd three-phase isolation switch G3 be connected two the sub-PO1 of lead-out terminal first cathode output end and the sub-PO2 of second cathode output end of output negative pole, wherein the second lead-out terminal ZO2 links to each other with positive pole by the 7th three-phase isolation switch G7, the sub-PO1 of first cathode output end links to each other with negative pole by the 8th three-phase isolation switch G8, link to each other by the 5th three-phase isolation switch G5 between the first lead-out terminal ZO1 and the sub-PO1 of first cathode output end, link to each other by the 6th three-phase isolation switch G6 between the second lead-out terminal ZO2 and the sub-PO2 of second cathode output end.Positive pole has two lead-out terminal ZO1 and ZO2 during as deicing device, negative pole has two lead-out terminal PO1 and PO2, wherein the second lead-out terminal ZO2 links to each other with positive pole by the 7th three-phase isolation switch G7, the sub-PO1 of first cathode output end links to each other with negative pole by the 8th three-phase isolation switch G8, link to each other by the 5th three-phase isolation switch G5 between the first lead-out terminal ZO1 and the sub-PO1 of first cathode output end, link to each other by the 6th three-phase isolation switch G6 between the second lead-out terminal ZO2 and the sub-PO2 of second cathode output end.
Referring to Fig. 2, be depicted as the schematic diagram that carries out A phase line ice-melting when the utility model moves as DC de-icing device.The second three-phase isolation switch G2, the 4th three-phase isolation switch G4, the 5th three-phase isolation switch G5, the 7th three-phase isolation switch G7 disconnect the first three-phase isolation switch G1, the 3rd three-phase isolation switch G3, the 6th three-phase isolation switch G6, the 8th three-phase isolation switch G8 closure at this moment.Device A, B, C inlet wire insert three-phase alternating-current supply via circuit breaker DL1, and L1 plays certain filter action as the inlet wire reactor, in order to ensure the operate as normal of thyristor better.The power switch module constitutes six pulse wave full-controlled rectifier bridges, the DC ice melting current that smoothly provides line ice-melting required that cut-offs by real-time control thyristor, wherein first power switch module THAZ1～THAZn constitutes A upper and lower bridge arm mutually respectively with second power switch module THAF1～THAFn, the 3rd power switch module THBZ1～THBZn constitutes B upper and lower bridge arm mutually respectively with the 4th power switch module THBF1～THBFn, and the 5th power switch module THCZ1～THCZn constitutes C upper and lower bridge arm mutually respectively with the 6th power switch module THCF1～THCFn.L2 in order to filtering DC side ripple, guarantees that the ice-melt power supply is stable, afterflow as the dc output end of smoothing reactor access rectifier bridge.Need A, B, the C three-phase line of ice-melt to be connected to the device dc output end first lead-out terminal ZO1, the second lead-out terminal ZO2 and the sub-PO1 of first cathode output end respectively, its offside three-phase short circuit.Be equivalent to A phase circuit be connected to the direct current output cathode separately this moment, B mutually with C mutually circuit be connected in the direct current output negative pole.In the deicing processes, A mutually as main ice-melt mutually its electric current that passes through be B mutually with mutually 2 times of C.
Referring to Fig. 3, be depicted as the schematic diagram that carries out B phase line ice-melting when the utility model moves as DC de-icing device.The second three-phase isolation switch G2, the 4th three-phase isolation switch G4, the 7th three-phase isolation switch G7, the 8th three-phase isolation switch G8 disconnect the first three-phase isolation switch G1, the 3rd three-phase isolation switch G3, the 5th three-phase isolation switch G5, the 6th three-phase isolation switch G6 closure at this moment.
Be equivalent to B phase circuit be connected to the direct current output cathode separately this moment, A mutually with C mutually circuit be connected in the direct current output negative pole.In the deicing processes, B mutually as main ice-melt mutually its electric current that passes through be A mutually with mutually 2 times of C.Other are same as Fig. 2 explanation.
Referring to Fig. 4, be depicted as the schematic diagram that carries out C phase line ice-melting when the utility model moves as DC de-icing device.The second three-phase isolation switch G2, the 4th three-phase isolation switch G4, the 5th three-phase isolation switch G5, the 6th three-phase isolation switch G6 disconnect the first three-phase isolation switch G1, the 3rd three-phase isolation switch G3, the 7th three-phase isolation switch G7, the 8th three-phase isolation switch G8 closure at this moment.
Be equivalent to C phase circuit be connected to the direct current output cathode separately this moment, A mutually with B mutually circuit be connected in the direct current output negative pole.In the deicing processes, C mutually as main ice-melt mutually its electric current that passes through be A mutually with mutually 2 times of B.Other are same as Fig. 2 explanation.
Referring to Fig. 5, the schematic diagram when being depicted as the utility model and moving as dynamic compensating device TSC.This moment, the first three-phase isolation switch G1, the 3rd three-phase isolation switch G3 disconnected, the second three-phase isolation switch G2, the 4th three-phase isolation switch G4 closure.Device A, B, C inlet wire insert three-phase alternating-current supply via circuit breaker DL1, and inlet wire reactor L1 and compensation condenser C1 constitute the capacitive compensation branch road jointly, and what L1 produced when being used to limit the capacitive branch switching shoves, and C1 is used to provide capacitive compensation idle.The power switch module constitutes the three-phase electronic switch, by cut-offfing of real-time control thyristor make three-phase compensation branch road can be fast switching repeatedly, wherein first power switch module THAZ1～THAZn inserts A mutually with the second power switch module THAF1～THAFn inverse parallel, the 3rd power switch module THBZ1～THBZn inserts B mutually with the 4th power switch module THBF1～THBFn inverse parallel, and the 5th power switch module THCZ1～THCZn inserts C mutually with the 6th power switch module THCF1～THCFn inverse parallel.
Claims (3)
1. DC de-icing device that reusable is TSC, it is characterized in that: comprise circuit breaker (DL1), inlet wire reactor (L1), dc flat-wave reactor (L2), compensation condenser (C1), first three-phase isolation switch (G1), second three-phase isolation switch (G2), the 3rd three-phase isolation switch (G3), the 4th three-phase isolation switch (G4), the 5th three-phase isolation switch (G5), the 6th three-phase isolation switch (G6), the 7th three-phase isolation switch (G7), the 8th three-phase isolation switch (G8) and by the first power switch module (THAZ1～THAZn), the second power switch module (THAF1～THAFn), the 3rd power switch module (THBZ1～THBZn), the 4th power switch module (THBF1～THBFn), the 5th power switch module (THCZ1～THCZn), the 6th power switch module (the three-phase brachium pontis that THCF1～THCFn) forms, circuit breaker (DL1) directly inserts three phase mains, insert inlet wire reactor (L1), then be connected with the three-phase brachium pontis that the power switch module constitutes thereafter; A phase and B that the A of first three-phase isolation switch (G1) is in the three-phase bridge arm mutually go up between the brachium pontis mutually, and B phase and C that B is in the three-phase bridge arm mutually go up between the brachium pontis mutually, and C links to each other with the cathode output end of three-phase brachium pontis; The A brachium pontis parallel connection mutually of the A of second three-phase isolation switch (G2) and three-phase bridge, the B brachium pontis parallel connection mutually of B and three-phase bridge, the C brachium pontis parallel connection mutually of C and three-phase bridge; A phase and B that the A of the 3rd three-phase isolation switch (G3) is in the three-phase bridge arm mutually descend between the brachium pontis mutually, and B phase and C that B is in the three-phase bridge arm mutually descend between the brachium pontis mutually, and C links to each other with the cathode output end of three-phase brachium pontis; The negative pole of brachium pontis links to each other under the 4th three-phase isolation switch (G4) and the three-phase bridge, connects three-phase compensation capacitor (C1) thereafter again, the other end three-phase short circuit of three-phase compensation capacitor (C1); The C of first three-phase isolation switch (G1) links to each other with dc flat-wave reactor (L2), the other end of dc flat-wave reactor (L2) links to each other with second lead-out terminal (ZO2) with first lead-out terminal (ZO1) of output cathode, the C of the 3rd three-phase isolation switch (G3) be connected first cathode output end (PO1) and second cathode output end (PO2) of output negative pole, wherein second lead-out terminal (ZO2) links to each other with positive pole by the 7th three-phase isolation switch (G7), first cathode output end (PO1) links to each other with negative pole by the 8th three-phase isolation switch (G8), link to each other by the 5th three-phase isolation switch (G5) between first lead-out terminal (ZO1) and first cathode output end (PO1), link to each other by the 6th three-phase isolation switch (G6) between second lead-out terminal (ZO2) and second cathode output end (PO2); Positive pole has two lead-out terminals during ice-melt: first lead-out terminal (ZO1) and second lead-out terminal (ZO2), negative pole has two lead-out terminals: first cathode output end (PO1) and second cathode output end (PO2), wherein second lead-out terminal (ZO2) links to each other with positive pole by the 7th three-phase isolation switch (G7), first cathode output end (PO1) links to each other with negative pole by the 8th three-phase isolation switch (G8), link to each other by the 5th three-phase isolation switch (G5) between first lead-out terminal (ZO1) and first cathode output end (PO1), link to each other by the 6th three-phase isolation switch (G6) between second lead-out terminal (ZO2) and second cathode output end (PO2); A, B, C three-phase line are connected to respectively: first lead-out terminal (ZO1), second lead-out terminal (ZO2) and first cathode output end (PO1), (G5～break-make G8) need to select each phase circuit of ice-melt by the 5th～the 8th three-phase isolation switch.
2. reusable according to claim 1 is the DC de-icing device of TSC, it is characterized in that: single power switch module is made up of grading resistor (Rp), damping resistance (Rs), damping capacitor (Cs) and thyristor (SCR), 1～15 power switch module series connection constitutes single-phase brachium pontis, grading resistor (Rp) and thyristor (SCR) static state voltage equipoise that is used in parallel, damping resistance (Rs) and damping capacitor (Cs) series connection back are in parallel with thyristor (SCR).
3. reusable according to claim 1 is the DC de-icing device of TSC, it is characterized in that: inlet wire reactor (L1) adopts air core reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201854831U CN201623436U (en) | 2009-06-18 | 2009-06-18 | Direct-current ice melting device capable of being multiplexed into TSC |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201854831U CN201623436U (en) | 2009-06-18 | 2009-06-18 | Direct-current ice melting device capable of being multiplexed into TSC |
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| CN201623436U true CN201623436U (en) | 2010-11-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354942A (en) * | 2011-10-20 | 2012-02-15 | 贵州电网公司输电运行检修分公司 | High-pressure DC (direct current) ice melting device |
| CN102739080A (en) * | 2012-06-21 | 2012-10-17 | 北京四方继保自动化股份有限公司 | Direct current de-icing device based on full-bridge modular multilevel converter |
| CN103457221A (en) * | 2012-05-28 | 2013-12-18 | 南京南瑞继保电气有限公司 | Method for configuring structure transformation of double 6-pulse thyristor converter valve groups |
| CN103746327A (en) * | 2013-12-18 | 2014-04-23 | 广西大学 | 10KV station-used type DC ice melting device |
-
2009
- 2009-06-18 CN CN2009201854831U patent/CN201623436U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354942A (en) * | 2011-10-20 | 2012-02-15 | 贵州电网公司输电运行检修分公司 | High-pressure DC (direct current) ice melting device |
| CN103457221A (en) * | 2012-05-28 | 2013-12-18 | 南京南瑞继保电气有限公司 | Method for configuring structure transformation of double 6-pulse thyristor converter valve groups |
| CN103457221B (en) * | 2012-05-28 | 2016-03-02 | 南京南瑞继保电气有限公司 | A kind of Structural Transformation collocation method of two 6 pulsation thyristor valves groups |
| CN102739080A (en) * | 2012-06-21 | 2012-10-17 | 北京四方继保自动化股份有限公司 | Direct current de-icing device based on full-bridge modular multilevel converter |
| CN102739080B (en) * | 2012-06-21 | 2015-04-22 | 北京四方继保自动化股份有限公司 | Direct current de-icing device based on full-bridge modular multilevel converter |
| CN103746327A (en) * | 2013-12-18 | 2014-04-23 | 广西大学 | 10KV station-used type DC ice melting device |
| CN103746327B (en) * | 2013-12-18 | 2016-10-05 | 广西宏湖水利电业科技发展有限公司 | Formula DC de-icing device is used at a kind of 10KV station |
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