CN205863870U - A kind of continuously adjustable hybrid DC de-icing device of output voltage electric current - Google Patents
A kind of continuously adjustable hybrid DC de-icing device of output voltage electric current Download PDFInfo
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- CN205863870U CN205863870U CN201620787310.7U CN201620787310U CN205863870U CN 205863870 U CN205863870 U CN 205863870U CN 201620787310 U CN201620787310 U CN 201620787310U CN 205863870 U CN205863870 U CN 205863870U
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Abstract
The utility model discloses a kind of continuously adjustable hybrid DC de-icing device of output voltage electric current, including Large Copacity adjusting shift ice-melt transformator, small capacity transformer, main uncontrollable rectifier device, secondary uncontrollable rectifier device, chopper control module and output disconnecting link, the secondary of Large Copacity adjusting shift ice-melt transformator is connected with the AC of main uncontrollable rectifier device, the secondary of small capacity transformer is connected with the AC of time uncontrollable rectifier device, chopper control module is located at the DC side of time uncontrollable rectifier device and is constituted time commutator, the DC side of secondary commutator is connected with the input of output disconnecting link after connecting with the DC side of the main uncontrollable rectifier device as main converter.This utility model is capable of ice-melt voltage x current continuously adjustabe on a large scale, it is applicable to 220kV and above is used for transmission line, cost is relatively low and ice-melt performance is good, fault-tolerant ability strong, ice-melt reliability harmonic current high, grid-connected is less, it is not necessary to those additional low order bank of filters of Thyristor Controlled rectification circuit.
Description
Technical field
This utility model relates to electrical engineering technology, be specifically related to a kind of output voltage electric current continuously adjustable hybrid directly
Stream deicing device.
Background technology
South China area ice disaster takes place frequently, and is prone to cause broken string bar after powerline ice-covering, and serious threat is to electricity
The safe and stable operation of net and power supply reliability.In particularly 2008 especially big ice damages, China East China, multiple provinces of Central China
Part occurrence of large-area, have a power failure for a long time, cause massive losses to the productive life of national economy and the people.
For reply ice disaster, domestic have developed polytype DC de-icing device to icing circuit implement direct current melt
Ice.These devices can be divided into uncontrollable rectifier type based on diode, phase control rectifier type based on IGCT, entirely control based on IGBT etc.
PWM rectification type three class of type switching device.Wherein the input and output technical performance of PWM rectification type deicing device is all fine, but institute
Needing the full-controlled switch device that many group unit prices are more expensive, cost is the highest and is difficult to popularization and application；Phase control rectifier type output voltage is continuous
Adjustable, but need additional configuration Large Copacity low-order harmonic device group could meet grid-connected harmonic requirement, cause package unit to take up an area face
Long-pending big, cost is higher；Uncontrollable rectifier type can be realized not synteny, different length circuit by the gear cooperation of ice-melt transformator
Ice-melt, simple in construction, with low cost, ice-melt high reliability and become the market mainstream.But due to uncontrollable rectifier type
Output voltage electric current can only realize discrete classification regulation, it is impossible to realizes ice melting current and the precise controlling of ice-melt time.Literary composition
Offering " can reduce input side harmonic wave and the adjustable deicing device of output voltage " (High-Voltage Technology, the fifth phase in 2013) proposes one
Plant agriculture distribution deicing device topological structure diode uncontrollable rectifier circuit and DC chopper circuit combined, it is only necessary to a full control
Type switching device can be achieved with the continuously adjustabe exporting DC voltage and current, but the voltage of this topology full-controlled switch device,
Current capacity cannot be below device rated output voltage and rated current.For high-voltage large-capacity deicing device, required full control
The capacity of type switching device is big, cost is high, and is limited by the resistance to voltage levels of current full-controlled switch device, needs multiple switch
Devices in series is applied in combination, and all pressure difficulty is big, it is complicated to control, reliability is the highest.Accordingly, it would be desirable to study simple and reliable, cost just
Preferably, ice-melt voltage x current continuously adjustable deicing device topographical form can be realized again simultaneously, have become as deicing device
Can promote, reduce the key technical problem that cost is urgently to be resolved hurrily.
Utility model content
The technical problems to be solved in the utility model: for the problems referred to above of prior art, it is provided that one is capable of melting
Ice voltage x current is continuously adjustabe on a large scale, it is adaptable to 220kV and above are used for transmission line, and cost is relatively low and melts
Ice performance is good, fault-tolerant ability is strong, ice-melt reliability harmonic current high, grid-connected is less, it is not necessary to Thyristor Controlled rectification circuit that
The continuously adjustable hybrid DC de-icing device of output voltage electric current of a little additional low order bank of filters.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is:
A kind of continuously adjustable hybrid DC de-icing device of output voltage electric current, including Large Copacity adjusting shift ice-melt transformation
Device, small capacity transformer, main uncontrollable rectifier device, secondary uncontrollable rectifier device, chopper control module and output disconnecting link, described Large Copacity can
Transfer the files ice-melt transformator, the former limit of small capacity transformer is connected with AC network respectively, described Large Copacity adjusting shift ice-melt transformation
The secondary of device is connected with the AC of main uncontrollable rectifier device, and the secondary of described small capacity transformer exchanges with time uncontrollable rectifier device
Side is connected, and described chopper control module is located at the DC side of time uncontrollable rectifier device and is constituted time commutator, described commutator straight
Stream side is connected with the input of output disconnecting link after connecting with the DC side of the main uncontrollable rectifier device as main converter.
Preferably, described chopper control module includes full-controlled switch device and fly-wheel diode, described main uncontrollable rectifier
The DC side negative pole of device is connected with the negative input of output disconnecting link, and the DC side positive pole of described main uncontrollable rectifier device is not controlled with secondary
The DC side negative pole of commutator is connected, and the DC side negative pole of described uncontrollable rectifier device is by fly-wheel diode and output disconnecting link
Electrode input end be connected, the DC side positive pole of described uncontrollable rectifier device is connected with the colelctor electrode C of full-controlled switch device, institute
The electrode input end of the emitter E and output disconnecting link of stating full-controlled switch device is connected.
Preferably, described full-controlled switch device is IGBT.
Preferably, the former limit of described Large Copacity adjusting shift ice-melt transformator is connected with AC network, secondary is provided with corresponding many
Multiple secondary taps of individual gear, the movable contact of the plurality of secondary tap is connected with the AC of main uncontrollable rectifier device.
Preferably, described Large Copacity adjusting shift ice-melt transformator is Y/d11 type two-winding transformer.
Preferably, described small capacity transformer is Y/d11 type two-winding transformer.
Preferably, described main uncontrollable rectifier device is the three-phase uncontrollable rectifier bridge being made up of diode.
Preferably, described uncontrollable rectifier device is the three-phase uncontrollable rectifier bridge being made up of diode.
The continuously adjustable hybrid DC de-icing device of this utility model output voltage electric current has an advantage that
1, this utility model only needs a chopper control module to be achieved that continuous in the range of quickly of ice-melt voltage
Adjustable, for chopper control module is compared to realizing the continuously adjustable full-controlled rectifier of voltage or phase control rectifier type structure equally,
Greatly reduce quantity and the capacity of gate-controlled switch device, tie compared to " uncontrollable rectifier+chopper control " two-stage cascade type topology
Structure, then significantly reduce the capacity requirement to gate-controlled switch device.Therefore, hybrid DC de-icing device of the present utility model is
The high performance-price ratio deicing device solution that a kind of cost is relatively low and ice-melt performance is the best.
2, structure fault-tolerant ability of the present utility model is strong, ice-melt reliability is high, owing to chopper control module is arranged on master not
Control rectifier, the DC side of secondary uncontrollable rectifier device, main uncontrollable rectifier device, the DC side of secondary uncontrollable rectifier device pass through after being serially connected
Chopper control module with output disconnecting link input be connected, therefore because of chopper control module self damage understand driving control system therefore
Hindering and cause under the unusual service condition of open circuit or short circuit, on a large scale, interior adjustable ice-melt voltage is to realize ice-melt, only to remain to output
It is that control accuracy is somewhat deteriorated.
3, grid-connected harmonic current of the present utility model is less, it is not necessary to those additional low orders of Thyristor Controlled rectification circuit are filtered
Ripple device group.
Accompanying drawing explanation
Fig. 1 is the topological structure schematic diagram of this utility model embodiment.
Fig. 2 is motion mode schematic diagram during IGBT open circuit in this utility model embodiment.
Fig. 3 is motion mode schematic diagram during IGBT short circuit in this utility model embodiment.
Fig. 4 is the output voltage U of main uncontrollable rectifier device in this utility model embodiment1dcSimulation waveform.
Fig. 5 is the output voltage U of time uncontrollable rectifier device in this utility model embodiment2dcSimulation waveform.
Fig. 6 is time rectifier output voltage U in this utility model embodiment2oSimulation waveform.
Fig. 7 is output total voltage U of the hybrid DC de-icing device of the present embodiment in this utility model embodimentdcEmulation
Waveform.
Fig. 8 is the output ice melting current I of the hybrid DC de-icing device of the present embodiment in this utility model embodimentdcImitative
True waveform.
Marginal data: 1, Large Copacity adjusting shift ice-melt transformator；2, small capacity transformer；3, main uncontrollable rectifier device；4, secondary
Uncontrollable rectifier device；5, chopper control module；51, full-controlled switch device；52, fly-wheel diode；6, output disconnecting link.
Detailed description of the invention
Hereafter will export at 2-12.5kV DC voltage continuously adjustabe to realize ice-melt voltage, specified ice-melt capacity is 25MW
The continuously adjustable hybrid DC de-icing device of output voltage electric current as a example by, this utility model output voltage electric current continuously may be used
The hybrid DC de-icing device adjusted is described in further detail.
As it is shown in figure 1, the continuously adjustable hybrid DC de-icing device of the present embodiment output voltage electric current includes Large Copacity
Adjusting shift ice-melt transformator 1, small capacity transformer 2, main uncontrollable rectifier device 3, secondary uncontrollable rectifier device 4, chopper control module 5 and defeated
Going out disconnecting link 6, Large Copacity adjusting shift ice-melt transformator 1, the former limit of small capacity transformer 2 are connected with AC network respectively, Large Copacity
The secondary of adjusting shift ice-melt transformator 1 is connected with the AC of main uncontrollable rectifier device 3, the secondary of small capacity transformer 2 and time not
The AC of control rectifier 4 is connected, and chopper control module 5 is located at the DC side of time uncontrollable rectifier device 4 and is constituted time commutator, secondary whole
Stream device DC side and as main converter main uncontrollable rectifier device 3 DC side series connection after and output disconnecting link 6 input phase
Even.By said structure, main uncontrollable rectifier device 3 as main converter, by with Large Copacity adjusting shift ice-melt transformator 1
Gear coordinates output at the DC voltage of wide range internal classification change, and chopper control module 5 is again together with secondary uncontrollable rectifier device 4
Constituting time commutator, output is only capable of continuously adjustable voltage in little scope, due to main converter and the DC side of time commutator
Series connection, therefore the output voltage of the hybrid DC de-icing device of the present embodiment is equal to the linear superposition of both voltages, such as formula (1) institute
Show；
Udc=U1dc+U2o (1)
In formula (1), UdcFor the DC voltage of the actual output of the hybrid DC de-icing device of the present embodiment, U1dcRepresent main whole
The output voltage of stream device, U2oRepresent the output voltage of time commutator.Wherein, main converter output voltage U1dcAdjustable with Large Copacity
The gear one_to_one corresponding of shelves ice-melt transformator 1, is represented by shown in formula (2)；
U1dc=ux,ux∈{U1_1,U1_2,……U1_N} (2)
In formula (2), U1dcAnd uxRepresent the output voltage of main converter, U1_1、U1_2、……U1_NRepresent that Large Copacity can respectively
Transfer the files the output voltage of main uncontrollable rectifier device 3 under each gear of ice-melt transformator 1.
The output voltage U of secondary commutator2oCan be by chopper control module 5 continuously adjustabe, its value is represented by shown in formula (3)；
U2o=ux,ux∈[0,U2dc] (3)
In formula (3), U2oAnd uxRepresent the output voltage of time commutator, U2dcOutput voltage for secondary uncontrollable rectifier device 4.
According to formula (1), (2) and (3), the continuously adjustable hybrid DC de-icing device of the present embodiment output voltage electric current is defeated
The ice-melt voltage gone out is represented by shown in formula (4)；
In formula (4), the implication of parameters refers to formula (1)～(3), does not repeats them here.
Output voltage U when secondary uncontrollable rectifier device 42dcWhen meeting relation shown in formula (5), the output electricity of DC de-icing device
Pressure can be at [U1_1,U1_N+U2dcContinuously adjustabe between], it is sufficient to meet and ice-melt voltage x current is fine-tuned requirement；If any needing
Want, by the rational deployment to transformer gear, ice-melt voltage also can be made [0, U1_N+U2dcContinuously adjustabe between].Consider
The gear design typical case of ice-melt transformator understands, U2dcTypically do not require more than the 20% of deicing device rated output voltage.
U2dc≥U1_2-U1_1And U2dc≥U1_3-U1_2And ... U2dc≥U1_N-U1_(N-1) (5)
In formula (5), the implication of parameters refers to formula (1)～(3), does not repeats them here.
The hybrid DC de-icing device of the present embodiment when actual ice-melt, first according to by the line style of DC ice-melting, temperature,
Ice melting current required for the parameter determinations such as wind speed, in conjunction with the ice-melt voltage required for the parameter prediction such as line length, impedance,
Then the gear selecting suitable Large Copacity adjusting shift ice-melt transformator 1 makes its most required ice-melt voltage, the more full control of regulation and control
The entirety that the dutycycle of type switching device 51 (IGBT) regulates time commutator and the hybrid DC de-icing device of the present embodiment is defeated
Go out voltage, make ice melting current just on required numerical point.
As it is shown in figure 1, the former limit of Large Copacity adjusting shift ice-melt transformator 1 is connected with AC network, secondary is provided with corresponding many
Multiple secondary taps of individual gear, the movable contact of the plurality of secondary tap is connected with the AC of main uncontrollable rectifier device 3.
In the present embodiment, Large Copacity adjusting shift ice-melt transformator 1 is Y/d11 type two-winding transformer, the specified input in former limit
Voltage 10kV, secondary is provided with corresponding 2kV, 4kV, 6kV, 8kV, 10kV voltage gear and arranges 5 secondary taps 13, former limit and pair altogether
The rated capacity become is all for 20.8MVA, and former secondary change rated current is all into 1200A.
In the present embodiment, small capacity transformer 2 is Y/d11 type two-winding transformer, and its former limit and secondary time variant voltage are respectively
10kV and 2kV, former limit and the secondary rated capacity become are all for 5.16MVA, and former secondary change rated current is all into 1200A.
In the present embodiment, main uncontrollable rectifier device 3 is the three-phase uncontrollable rectifier bridge being made up of diode, and nominal input voltage is
10kV (AC), rated output voltage is 12.5V (DC), and output-current rating is 2000A.
In the present embodiment, secondary uncontrollable rectifier device 4 is the three-phase uncontrollable rectifier bridge being made up of diode, and nominal input voltage is
2kV (AC), rated output voltage is 2.5V (DC), and output-current rating is 2000A.
As it is shown in figure 1, chopper control module 5 includes full-controlled switch device 51 and fly-wheel diode 52, main uncontrollable rectifier
The DC side negative pole of device 3 is connected with the negative input of output disconnecting link 6, and the DC side positive pole of main uncontrollable rectifier device 3 is not controlled with secondary
The DC side negative pole of commutator 4 is connected, and the DC side negative pole of secondary uncontrollable rectifier device 4 is by fly-wheel diode 52 and output disconnecting link
The electrode input end of 6 is connected, and the DC side positive pole of secondary uncontrollable rectifier device 4 is connected, entirely with the colelctor electrode C of full-controlled switch device 51
The emitter E of control type switching device 51 is connected with the electrode input end of output disconnecting link 6.By full-controlled switch device 51 and afterflow
Diode 52 constitutes the Buck voltage regulation circuit of chopping that can realize continuous voltage regulating, and the work in conjunction with Buck voltage regulation circuit of chopping is former
Reason understands, and the ceiling voltage at full-controlled switch device 51 two ends is less than U2dc, therefore it is pressure much smaller than the present embodiment mixing
The rated output voltage of formula DC de-icing device, also avoids the need for full-controlled switch device 51 and is used in series；Add this entirely to control
The electric current that type switching device 51 flows through is equal to the output electric current of the hybrid DC de-icing device of the present embodiment, and therefore its capacity is permissible
Much smaller than the hybrid DC de-icing device of the present embodiment rated capacity.As it is shown in figure 1, full-controlled switch device 51 is
IGBT.In the present embodiment, IGBT specifically uses FZ1500R33HL3 type IGBT of company of Infineon, the rated voltage of individual module
It is respectively 3300V, 1500A with electric current, for meeting current needs, uses Dual module used in parallel.In the present embodiment, afterflow two pole
Pipe 52 uses commercially available Power Diode Pumped ZP1-2000, rated current 2000A, rated voltage 4000V.
In the present embodiment, cause full-control type when full-controlled switch device 51 (IGBT) because of power device or control drive circuit
During switching device 51 (IGBT) fault, it typically has and only has short circuit and two kinds of duties of short circuit.
As in figure 2 it is shown, when full-controlled switch device 51 (IGBT) open circuit, secondary uncontrollable rectifier device 4 is equivalent to no-load open circuit,
The most main uncontrollable rectifier device 3 constitutes current loop, now originally through fly-wheel diode 52, output disconnecting link 6, line ice-melting load etc.
The voltage no longer continuously adjustabe (being equivalent to U2c ≡ 0) of the hybrid DC de-icing device of embodiment, but still there is ice-melt function.
As it is shown on figure 3, when full-controlled switch device 51 (IGBT) short circuit, secondary uncontrollable rectifier device 4 and main uncontrollable rectifier device 3
Directly series connection, its output constitutes current loop, now this reality through fly-wheel diode 52, output disconnecting link 6, line ice-melting load etc.
The voltage executing the hybrid DC de-icing device of example is also that no longer continuously adjustabe (is equivalent to U2c≡U2dc), but still there is ice-melt function.
Therefore the topological structure self of the hybrid DC de-icing device of the present embodiment has the strongest fault tolerance, and reliability is the highest.
Model laggard in Matlab/Simulink as Fig. 4～Fig. 8 show the hybrid DC de-icing device of the present embodiment
The simulation result that row emulation obtains, wherein Fig. 4 is the output voltage U of main uncontrollable rectifier device 31dcSimulation waveform, Fig. 5 is not time not
The output voltage U of control rectifier 42dcSimulation waveform, Fig. 6 is time rectifier output voltage U2oSimulation waveform, Fig. 7 is this reality
Execute output total voltage U of the hybrid DC de-icing device of exampledcSimulation waveform, Fig. 8 be the present embodiment hybrid DC ice melting dress
The output ice melting current I putdc.It is obvious that the output voltage U of main uncontrollable rectifier device 3 from Fig. 4～Fig. 81dcWith secondary not
The output voltage U of control rectifier 42dcIt is all typical six kinds of pulses ripple commutating voltage, secondary rectifier output voltage U2oFor to secondary do not control whole
The output voltage U of stream device 42dcCarrying out the voltage after DC chopped-wave, the present embodiment hybrid DC de-icing device output total voltage is
UdcIt is the output voltage U of main uncontrollable rectifier device 31dWith secondary rectifier output voltage U2oLinear superposition, the present embodiment is hybrid directly
The output ice melting current I of stream deicing devicedcFor the DC current that ripple is the least, the amplitude of above-mentioned each amount and waveform all coincidence theory
Expection, thus demonstrate the effectiveness of carried topological structure.
In sum, the continuously adjustable hybrid DC de-icing device of the present embodiment output voltage electric current includes that Large Copacity can
Transfer the files ice-melt transformator 1, small capacity transformer 2, main uncontrollable rectifier device 3, secondary uncontrollable rectifier device 4, chopper control module 5 and output
Disconnecting link 6, the most main uncontrollable rectifier device 3 is as main converter, by coordinating defeated with the gear of Large Copacity adjusting shift ice-melt transformator 1
Go out the DC voltage in the change of wide range internal classification；Chopper control module 5 constitutes time rectification together with secondary uncontrollable rectifier device 4
Device, output is only capable of continuously adjustable voltage in little scope.Ice-melt is exported after the DC side series connection of main converter and time commutator
DC voltage, wherein main converter tentatively regulates for the wide scope exporting ice-melt voltage x current, and secondary commutator is for melting
The little scope finely regulating of ice voltage x current, the continuously adjustable hybrid DC de-icing device of the present embodiment output voltage electric current
Structure only needs the full-controlled switch device of a small amount of low capacity to be just enough to realize ice-melt voltage x current continuously adjustabe on a large scale,
Can be to develop high-voltage large-capacity DC de-icing device to provide a kind of simple and reliable for structure, the economic and converter system knot of excellent performance
Structure.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to
Go out, for those skilled in the art, without departing from the some improvement under this utility model principle premise and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (8)
1. the continuously adjustable hybrid DC de-icing device of output voltage electric current, it is characterised in that: include that Large Copacity is adjustable
Shelves ice-melt transformator (1), small capacity transformer (2), main uncontrollable rectifier device (3), secondary uncontrollable rectifier device (4), chopper control module
(5) and output disconnecting link (6), described Large Copacity adjusting shift ice-melt transformator (1), small capacity transformer (2) former limit respectively with friendship
Stream electrical network is connected, and the secondary of described Large Copacity adjusting shift ice-melt transformator (1) is connected with the AC of main uncontrollable rectifier device (3),
The secondary of described small capacity transformer (2) is connected with the AC of time uncontrollable rectifier device (4), and described chopper control module (5) sets
DC side in secondary uncontrollable rectifier device (4) constitutes time commutator, the DC side of described commutator and the master as main converter
It is connected with the input of output disconnecting link (6) after the DC side series connection of uncontrollable rectifier device (3).
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 1, it is characterised in that:
Described chopper control module (5) includes full-controlled switch device (51) and fly-wheel diode (52), described main uncontrollable rectifier device (3)
DC side negative pole be connected with the negative input of output disconnecting link (6), the DC side positive pole of described main uncontrollable rectifier device (3) and secondary
The DC side negative pole of uncontrollable rectifier device (4) is connected, and the DC side negative pole of described uncontrollable rectifier device (4) passes through fly-wheel diode
(52) electrode input end with output disconnecting link (6) is connected, the DC side positive pole of described uncontrollable rectifier device (4) and full-controlled switch
The colelctor electrode C of device (51) is connected, the positive pole input of the emitter E of described full-controlled switch device (51) and output disconnecting link (6)
End is connected.
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 2, it is characterised in that:
Described full-controlled switch device (51) is IGBT.
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 1, it is characterised in that:
The former limit of described Large Copacity adjusting shift ice-melt transformator (1) is connected with AC network, secondary is provided with the multiple of corresponding multiple gear
Secondary tap, the movable contact of the plurality of secondary tap is connected with the AC of main uncontrollable rectifier device (3).
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 4, it is characterised in that:
Described Large Copacity adjusting shift ice-melt transformator (1) is Y/d11 type two-winding transformer.
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 1, it is characterised in that:
Described small capacity transformer (2) is Y/d11 type two-winding transformer.
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 1, it is characterised in that:
Described main uncontrollable rectifier device (3) is the three-phase uncontrollable rectifier bridge being made up of diode.
The continuously adjustable hybrid DC de-icing device of output voltage electric current the most according to claim 1, it is characterised in that:
Described time uncontrollable rectifier device (4) is the three-phase uncontrollable rectifier bridge being made up of diode.
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| CN201620787310.7U CN205863870U (en) | 2016-07-25 | 2016-07-25 | A kind of continuously adjustable hybrid DC de-icing device of output voltage electric current |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025986A (en) * | 2016-07-25 | 2016-10-12 | 国网湖南省电力公司 | Hybrid direct current ice melting apparatus with output voltage and current being continuously adjustable |
| CN108123413A (en) * | 2017-12-28 | 2018-06-05 | 国网湖南省电力有限公司 | Fine adjustable diode rectification type DC de-icing device and method |
| CN112234567A (en) * | 2020-11-06 | 2021-01-15 | 国网湖南省电力有限公司 | Novel uncontrolled direct current ice melting device and ice melting method thereof |
| CN113161965A (en) * | 2021-03-09 | 2021-07-23 | 湖南防灾科技有限公司 | Efficient direct-current ice melting device special for wind power circuit and parameter adaptation method thereof |
-
2016
- 2016-07-25 CN CN201620787310.7U patent/CN205863870U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025986A (en) * | 2016-07-25 | 2016-10-12 | 国网湖南省电力公司 | Hybrid direct current ice melting apparatus with output voltage and current being continuously adjustable |
| CN108123413A (en) * | 2017-12-28 | 2018-06-05 | 国网湖南省电力有限公司 | Fine adjustable diode rectification type DC de-icing device and method |
| CN112234567A (en) * | 2020-11-06 | 2021-01-15 | 国网湖南省电力有限公司 | Novel uncontrolled direct current ice melting device and ice melting method thereof |
| CN113161965A (en) * | 2021-03-09 | 2021-07-23 | 湖南防灾科技有限公司 | Efficient direct-current ice melting device special for wind power circuit and parameter adaptation method thereof |
| CN113161965B (en) * | 2021-03-09 | 2022-07-19 | 湖南防灾科技有限公司 | Efficient direct-current ice melting device special for wind power circuit and parameter adaptation method thereof |
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