CN103368124B - A kind of DC de-icing device and method - Google Patents
A kind of DC de-icing device and method Download PDFInfo
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- CN103368124B CN103368124B CN201310329226.1A CN201310329226A CN103368124B CN 103368124 B CN103368124 B CN 103368124B CN 201310329226 A CN201310329226 A CN 201310329226A CN 103368124 B CN103368124 B CN 103368124B
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Abstract
The invention discloses a kind of DC de-icing device and method, comprise AC to power circuit breaker Q F, reactor, the rectifier be connected with reactor and the knife switch that is connected with rectifier, also comprise: be connected to AC and power between circuit breaker Q F and reactor, for realizing the converter to different length transmission line de-icing, wherein, converter comprises: rectifier transformer, short circuit busbar and switch.Rectifier transformer is linked into AC and powers between circuit breaker Q F and reactor by switch, can realize the ice-melt to short distance transmission line; Short circuit busbar is linked into AC and powers between circuit breaker Q F and reactor by switch, can realize the ice-melt to long distance transmission line.Therefore, the transmission line for different length carries out ice-melt, by switch selectivity, rectifier transformer or short circuit busbar is linked into AC and powers between circuit breaker Q F and reactor, namely achieves and carries out ice-melt to the transmission line of different length.
Description
Technical field
The present invention relates to power transmission network power line DC ice-melting applied technical field, in particular, relate to a kind of DC de-icing device and method.
Background technology
The powerline ice-covering that low temperature sleet and snow ice weather causes is one of serious threat of facing of numerous State Grids system, serious icing can cause electrical network broken string, tower, cause large area blackout, also fast quick-recovery power transmission is made to become very difficult, therefore, for reply, ice damage is to the serious threat of electric power system infrastructure more and more frequently, and industrial quarters and academia have studied multiple deicing, de-icing technology.
The widely used deicing of current existence, deicing device are DC de-icing device, the general principle that DC de-icing device adopts is that alternating current is transformed into direct current, direct current is loaded on icing circuit again, is realized the ice-melt of circuit by the heating of resistance.When DC de-icing device carries out ice-melt to the circuit of different length, need to export different voltage.Comprise for solving the method exporting different voltage:
1, in DC de-icing device, use voltage regulator pressure regulation to change output voltage.But the capacity of the voltage regulator of present stage is less, make the voltage of output less, therefore, this mode is only applicable to the ice-melt to short distance transmission line.
2, using the input power of the line voltage of transformer station as DC de-icing device, the angle of flow of rectifier in transformer station is regulated to change output voltage.But for the ice-melt of short distance transmission line, the angle of flow of rectifier is in non-full open state, can produce a large amount of harmonic injection electrical networks, cause serious harmonic pollution, and therefore, this mode is only applicable to the ice-melt to long distance transmission line.
Based on the ice-melting mode of DC de-icing device in the prior art of foregoing description, all can not realize carrying out ice-melt to the transmission line of different length.Therefore, a kind of DC de-icing device is badly in need of to realize carrying out ice-melt to the transmission line of different length.
Summary of the invention
For the problems referred to above, the invention provides a kind of DC de-icing device and method, be badly in need of a kind of DC de-icing device to realize carrying out the transmission line of different length the problem of ice-melt to solve in prior art.Technical scheme is as follows:
Based on an aspect of of the present present invention, a kind of DC de-icing device is provided, comprise: AC is powered circuit breaker Q F, reactor, the rectifier be connected with described reactor and the knife switch that is connected with described rectifier, also comprise: be connected to described AC and power between circuit breaker Q F and described reactor, for realizing the converter to different length transmission line de-icing, wherein, described converter comprises: rectifier transformer, short circuit busbar and switch; Wherein,
Described rectifier transformer and described short circuit busbar are connected in parallel in described converter;
Described switch is used in described rectifier transformer and described short circuit busbar is linked into described AC powers between circuit breaker Q F and described reactor, to power circuit breaker Q F and described reactor to be communicated with described AC.
Preferably, described switch comprises Triple Pole Double-Throw K switch 1 and Triple Pole Double-Throw K switch 2; Wherein,
The first end of described Triple Pole Double-Throw K switch 1 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer or one end of described short circuit busbar;
The first end of described Triple Pole Double-Throw K switch 2 connects described reactor, and the second end connects the output of described rectifier transformer or the other end of described short circuit busbar.
Preferably, described switch comprises Triple Pole Double-Throw switch F1, three-phase disconnection switch F2 and three-phase disconnection switch F3; Wherein,
The first end of described Triple Pole Double-Throw switch F1 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer or one end of described short circuit busbar;
The first end of described three-phase disconnection switch F2 connects described reactor, and the second end connects the output of described rectifier transformer;
The first end of described three-phase disconnection switch F3 connects described reactor, and the second end connects the other end of described short circuit busbar;
Or
The first end of described three-phase disconnection switch F2 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer;
The first end of described three-phase disconnection switch F3 connects described AC and to power circuit breaker Q F, and the second end connects one end of described short circuit busbar;
The first end of described Triple Pole Double-Throw switch F1 connects described reactor, and the second end connects the output of described rectifier transformer or the other end of described short circuit busbar.
Preferably, described switch comprises three-phase disconnection switch F4, three-phase disconnection switch F5, three-phase disconnection switch F6 and three-phase disconnection switch F7; Wherein,
The first end of described three-phase disconnection switch F4 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer;
The first end of described three-phase disconnection switch F5 connects the output of described rectifier transformer, and the second end connects described reactor;
The first end of described three-phase disconnection switch F6 connects described AC and to power circuit breaker Q F, and the second end connects one end of described short circuit busbar;
The first end of described three-phase disconnection switch F7 connects the other end of described short circuit busbar, and the second end connects described reactor.
Preferably, also comprise:
To power the bank of filters that circuit breaker Q F is connected with described AC, for reactive power compensation and harmonics restraint.
Based on another aspect of the present invention, also provide a kind of direct current ice melting method, be applied in DC de-icing device as above, comprise:
Judge the length of DC ice-melting;
When the length of DC ice-melting is positioned at the first length range, control converter and select the first connected mode, described first connected mode is the rectifier transformer in converter is linked into AC power between circuit breaker Q F and reactor, to power circuit breaker Q F and reactor to be communicated with AC;
When the length of DC ice-melting is positioned at the second length range, control converter and select the second connected mode, described second connected mode is the short circuit busbar in converter is linked into AC power between circuit breaker Q F and reactor, to power circuit breaker Q F and reactor to be communicated with AC, the initial value of wherein said second length range is greater than the stop value of described first length range.
Application technique scheme, DC de-icing device provided by the invention comprises the converter for realizing different length transmission line de-icing, and wherein, converter comprises: rectifier transformer, short circuit busbar and switch.Rectifier transformer is linked into AC and powers between circuit breaker Q F and reactor by switch, to power circuit breaker Q F and reactor to be communicated with AC, carry out on-load voltage regulation by rectifier transformer, then by regulating the angle of flow of rectifier to change output voltage, realize the ice-melt to short distance transmission line; Short circuit busbar is linked into AC and powers between circuit breaker Q F and reactor by switch, to power circuit breaker Q F and reactor to be communicated with AC, namely direct using the input voltage of the voltage of transformer station's electrical network as rectifier, by regulating the angle of flow of rectifier to change output voltage, realize the ice-melt to long distance transmission line.Therefore, the transmission line for different length carries out ice-melt, by switch selectivity, rectifier transformer or short circuit busbar is linked into AC and powers between circuit breaker Q F and reactor, namely achieves and carries out ice-melt to the transmission line of different length.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that the invention provides a kind of DC de-icing device;
Fig. 2 is the structural representation of the converter of a kind of DC de-icing device provided by the invention;
Fig. 3 is the system electrical structural representation of a kind of DC de-icing device provided by the invention;
Fig. 4 is the structural representation of the switch that the invention provides a kind of DC de-icing device;
Fig. 5 is the another kind of structural representation of the switch of a kind of DC de-icing device provided by the invention;
Fig. 6 is another structural representation of the switch of a kind of DC de-icing device provided by the invention;
Fig. 7 is the another kind of structural representation of a kind of DC de-icing device provided by the invention;
Fig. 8 is the flow chart of a kind of direct current ice melting method provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
An embodiment
Refer to Fig. 1, it illustrates the structural representation that the invention provides a kind of DC de-icing device, comprising: AC is powered circuit breaker Q F100, converter 200, reactor 300, rectifier 400 and knife switch 500.
Wherein, converter 200 is connected to AC and powers between circuit breaker Q F100 and reactor 300, for controlling the inner connecting way of converter 200, to realize different length transmission line de-icing.Particularly, refer to Fig. 2, it illustrates the structural representation of the converter of a kind of DC de-icing device provided by the invention, converter 200 can comprise: rectifier transformer 201, short circuit busbar 202 and switch 203.
Rectifier transformer 201 is power transformers of rectifying installation, and in actual applications, rectifier transformer 201 is general to be connected, for the alternating voltage of transformer station's electrical network output being converted into the direct voltage needed for DC de-icing device with transformer station electrical network.Coarse adjustment is carried out in the on-load voltage regulation regulating rectifier transformer 201 to carry, then by finely tuning the output voltage changing DC de-icing device to the angle of flow of rectifier 400.
Short circuit busbar 202 is in electric power system, for connecting the wire of the switch in electric cabinet in total switch processed and each shunt circuit, be generally copper bar or aluminium row, and insulation processing is done on surface.In the present embodiment, the alternating voltage that transformer station's electrical network exports by short circuit busbar 202, as the input power of DC de-icing device, regulates the angle of flow of rectifier 400 to change the output voltage of DC de-icing device.
In the present embodiment, rectifier transformer 201 and short circuit busbar 202 are connected in parallel in converter 200.
Switch 203 is powered between circuit breaker Q F100 and reactor 300 in rectifier transformer 201 and short circuit busbar 202 is linked into AC, to power circuit breaker Q F100 and reactor 300 to be communicated with AC.
It is relevant with needing the length scale of the transmission line carrying out ice-melt in practical application that in rectifier transformer 201 and short circuit busbar 202 one is linked into the power selection of the connected mode between circuit breaker Q F100 and reactor 300 of AC by switch 203.In the present embodiment, when switch 203 is selected to be connected with short circuit busbar 202, voltage in transformer station's electrical network directly inputs to rectifier 400 by short circuit busbar 202, changes output voltage, thus realize the ice-melt to long distance transmission line by carrying out adjustment to the angle of flow of rectifier 400; When switch 203 is selected to be connected with rectifier transformer 201, DC de-icing device comprises rectifier transformer 201, voltage in transformer station's electrical network is first carried out on-load voltage regulation by rectifier transformer 201, then rectifier 400 is inputed to, change output voltage by carrying out adjustment to the angle of flow of rectifier 400 again, realize the ice-melt to short distance transmission line.
Power one end of circuit breaker Q F100 of AC connects transformer station electrical network, by the voltage of transformer station's electrical network access DC de-icing device.Certainly, the AC circuit breaker Q F100 that powers can also be connected with other generating equipments such as generator, generator car.
Reactor 300 is connected with the input of rectifier 400, for increasing the short-circuit impedance of DC de-icing device, limiting short-circuit current.
Rectifier 400 comprises cathode output end 401 and cathode output end 402, exports for alternating current is converted to direct current.
Knife switch 500 comprises: switch 501, switch 502, switch 503 and switch 504, refer to Fig. 3, and Fig. 3 it illustrates the system electrical structural representation of a kind of DC de-icing device provided by the invention.Wherein, the cathode output end 401 of rectifier 400 is connected with one end of the switch 501 of knife switch 500 or one end of switch 502, and the cathode output end 402 of rectifier 400 is connected with one end of the switch 503 of knife switch 500 or one end of switch 504.The other end of the switch 501 of knife switch 500 is connected with A phase ice-melt wire, the other end of the switch 504 of knife switch 500 is connected with C phase ice-melt wire, and the other end of the switch 502 of knife switch 500 is connected with B phase ice-melt wire by DC ice melting bus with the other end of switch 503.
In the present embodiment, the AC circuit breaker Q F100 that powers is connected with transformer station electrical network, and the switch 203 in converter 200 is powered between circuit breaker Q F100 and reactor 300 according to needing the length scale selectivity of the transmission line carrying out ice-melt that in rectifier transformer 201 or short circuit busbar 202 is linked into AC in practical application.Close AC to power circuit breaker Q F100, the voltage of transformer station's electrical network is inputed to reactor 300 through converter 200, input to rectifier 400 via reactor 300 again and carry out rectification, export at the cathode output end 401 of rectifier 400 and cathode output end 402 after rectifier 400 rectification, eventually pass knife switch 500 and export the ice-melt carrying out transmission line in three-phase circuit to.
It should be noted that: in the present embodiment, AC is powered between rectifier transformer 201, short circuit busbar 202 and switch 203 in circuit breaker Q F100, converter 200, reactor 300 and rectifier 400 and is all adopted three-phase and four-line star or the leg-of-mutton junction style of phase three-wire three, and DC de-icing device runs work in three-phase power supply system.
Application technique scheme, converter 200 comprises: rectifier transformer 201, short circuit busbar 202 and switch 203.Rectifier transformer 201 is linked into AC and powers between circuit breaker Q F100 and reactor 300 by switch 203, to power circuit breaker Q F100 and reactor 300 to be communicated with AC, on-load voltage regulation is carried out by rectifier transformer 201, again by regulating the angle of flow of rectifier 400 to change output voltage, realize the ice-melt to short distance transmission line; Short circuit busbar 202 is linked into AC and powers between circuit breaker Q F100 and reactor 300 by switch 203, to power circuit breaker Q F100 and reactor 300 to be communicated with AC, namely direct using the input voltage of the voltage of transformer station's electrical network as rectifier 400, by regulating the angle of flow of rectifier 400 to change output voltage, realize the ice-melt to long distance transmission line.Therefore, transmission line for different length carries out ice-melt, by switch 203 selectivity, rectifier transformer 201 or short circuit busbar 202 being linked into AC powers between circuit breaker Q F100 and reactor 300, namely achieves and carries out ice-melt to the transmission line of different length.
Another embodiment
For above-mentioned switch 203, switch 203 can comprise Triple Pole Double-Throw K switch 1 and Triple Pole Double-Throw K switch 2.Refer to Fig. 4, it illustrates the structural representation of the switch of a kind of DC de-icing device provided by the invention, wherein, the first end of Triple Pole Double-Throw K switch 1 connects AC and to power circuit breaker Q F100, and the second end connects the input of rectifier transformer 201 or one end of short circuit busbar 202; First end linked reactor 300, second end of Triple Pole Double-Throw K switch 2 connects the output of rectifier transformer 201 or the other end of short circuit busbar 202.
In the present embodiment, operating personnel only need the connected mode simply controlling Triple Pole Double-Throw K switch 1 and Triple Pole Double-Throw K switch 2, namely realize the access to rectifier transformer in DC de-icing device 201 or short circuit busbar 202.
In actual applications, the adjustable range of rectifier transformer 201 is less, be applicable to the ice-melt of short distance transmission line, short circuit busbar 202 is equivalent to a wire, being connected to AC powers between circuit breaker Q F100 and reactor 300, realize directly the voltage of transformer station's electrical network being directly inputted into DC de-icing device, namely the capacity of the ice-melt power supply of DC de-icing device is large, is applicable to the ice-melt of long distance transmission line.Therefore, according to the length scale of transmission line needing ice-melt in practical application, by Triple Pole Double-Throw K switch 1 and Triple Pole Double-Throw K switch 2 selectivity, in rectifier transformer 201 and short circuit busbar 202 can be linked into AC and power between circuit breaker Q F100 and reactor 300.
During ice-melt for short distance transmission line, the first end of Triple Pole Double-Throw K switch 1 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201, the first end linked reactor 300 of Triple Pole Double-Throw K switch 2, when second end connects the output of rectifier transformer 201, rectifier transformer 201 is linked into AC and powers between circuit breaker Q F100 and reactor 300 by switch 203, the rectifier transformer 201 be about in converter 200 is now linked in DC de-icing device, this DC de-icing device is used in short distance transmission line, according to the length scale of different transmission line, DC de-icing device is regulated to export different voltage, and then the ice-melt realized transmission line.
During ice-melt for long distance transmission line, the first end of Triple Pole Double-Throw K switch 1 connects AC and to power circuit breaker Q F100, second end connects one end of short circuit busbar 202, the first end linked reactor 300 of Triple Pole Double-Throw K switch 2, when second end connects the other end of short circuit busbar 202, short circuit busbar 202 is linked into AC and powers between circuit breaker Q F100 and reactor 300 by switch 203, the short circuit busbar 202 be about in converter 200 is now linked in DC de-icing device, this DC de-icing device is used in long distance transmission line, according to the length scale of different transmission line, DC de-icing device is regulated to export different voltage, and then the ice-melt realized transmission line.
It should be noted that: to power circuit breaker Q F100 when the first end of Triple Pole Double-Throw K switch 1 connects AC, second end connects one end of short circuit busbar 202, the first end linked reactor 300 of Triple Pole Double-Throw K switch 2, when second end connects the output of rectifier transformer 201, or, the first end of Triple Pole Double-Throw K switch 1 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201, the first end linked reactor 300 of Triple Pole Double-Throw K switch 2, when second end connects one end of short circuit busbar 202, the connecting circuit that in converter 200, formation one is not complete, rectifier transformer 201 and short circuit busbar 202 are all in off-state, DC de-icing device now can not work.
Another embodiment
For above-mentioned switch 203, switch 203 can comprise Triple Pole Double-Throw switch F1, three-phase disconnection switch F2 and three-phase disconnection switch F3.Refer to Fig. 5, it illustrates the another kind of structural representation of the switch of a kind of DC de-icing device provided by the invention, wherein, the first end of Triple Pole Double-Throw switch F1 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201 or one end of short circuit busbar 202, the first end linked reactor 300 of three-phase disconnection switch F2, second end connects the output of rectifier transformer 201, first end linked reactor 300, second end of three-phase disconnection switch F3 connects the other end of short circuit busbar 202.
Or,
The first end of three-phase disconnection switch F2 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201, the first end of three-phase disconnection switch F3 connects AC and to power circuit breaker Q F100, second end connects one end of short circuit busbar 202, first end linked reactor 300, second end of Triple Pole Double-Throw switch F1 connects the output of rectifier transformer 201 or the other end of short circuit busbar 202.
In actual applications, the adjustable range of rectifier transformer 201 is less, be applicable to the ice-melt of short distance transmission line, short circuit busbar 202 is equivalent to a wire, being connected to AC powers between circuit breaker Q F100 and reactor 300, realize directly the voltage of transformer station's electrical network being directly inputted into DC de-icing device, namely the capacity of the ice-melt power supply of DC de-icing device is large, is applicable to the ice-melt of long distance transmission line.Therefore, according to the length scale of transmission line needing ice-melt in practical application, by Triple Pole Double-Throw switch F1, three-phase disconnection switch F2 and three-phase disconnection switch F3 selectivity, in rectifier transformer 201 and short circuit busbar 202 can be linked into AC and power between circuit breaker Q F100 and reactor 300.
During ice-melt for long distance transmission line, the first end of Triple Pole Double-Throw switch F1 connects AC and to power circuit breaker Q F100, second end connects one end of short circuit busbar 202, three-phase disconnection switch F3 closes, its first end linked reactor 300, second end connects the other end of short circuit busbar 202, when three-phase disconnection switch F2 disconnects, short circuit busbar 202 is linked into AC and powers between circuit breaker Q F100 and reactor 300 by switch 203, the short circuit busbar 202 be about in converter 200 is now linked in DC de-icing device, this DC de-icing device is used in long distance transmission line, according to the length scale of different transmission line, DC de-icing device is regulated to export different voltage, and then the ice-melt realized transmission line.
During ice-melt for short distance transmission line, the first end of Triple Pole Double-Throw switch F1 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201, three-phase disconnection switch F2 closes, its first end linked reactor 300, second end connects the output of rectifier transformer 201, when three-phase disconnection switch F3 disconnects, rectifier transformer 201 is linked into AC and powers between circuit breaker Q F100 and reactor 300 by switch 203, the rectifier transformer 201 be about in converter 200 is now linked in DC de-icing device, this DC de-icing device is used in short distance transmission line, according to the length scale of different transmission line, DC de-icing device is regulated to export different voltage, and then the ice-melt realized transmission line.
First end for three-phase disconnection switch F2 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201, the first end of three-phase disconnection switch F3 connects AC and to power circuit breaker Q F100, second end connects one end of short circuit busbar 202, the first end linked reactor 300 of Triple Pole Double-Throw switch F1, second end connects the connected mode of the output of rectifier transformer 201 or the other end of short circuit busbar 202, compared with the connected mode of foregoing description, only by three-phase disconnection switch F2, three-phase disconnection switch F3 has exchanged position with Triple Pole Double-Throw switch F1, its implementation is identical, can reference mutually, here repeat no more.
It should be noted that: to power circuit breaker Q F100 when the first end of Triple Pole Double-Throw switch F1 connects AC, second end connects the input of rectifier transformer 201, three-phase disconnection switch F2 disconnects, the first end linked reactor 300 of three-phase disconnection switch F3, when second end connects the other end of short circuit busbar 202, or, to power circuit breaker Q F100 when the first end of Triple Pole Double-Throw switch F1 connects AC, second end connects one end of short circuit busbar 202, three-phase disconnection switch F3 disconnects, the first end linked reactor 300 of three-phase disconnection switch F2, when second end connects the output of rectifier transformer 201, the connecting circuit that in converter 200, formation one is not complete, rectifier transformer 201 and short circuit busbar 202 are all in the state do not accessed, DC de-icing device now can not work.
Another embodiment
For above-mentioned switch 203, switch 203 can comprise three-phase disconnection switch F4, three-phase disconnection switch F5, three-phase disconnection switch F6 and three-phase disconnection switch F7.Refer to Fig. 6, it illustrates another structural representation of the switch of a kind of DC de-icing device provided by the invention, wherein, the first end of three-phase disconnection switch F4 connects AC and to power circuit breaker Q F100, second end connects the input of rectifier transformer 201, the first end of three-phase disconnection switch F5 connects the output of rectifier transformer 201, second end linked reactor 300, the first end of three-phase disconnection switch F6 connects AC and to power circuit breaker Q F100, second end connects one end of short circuit busbar 202, the first end of three-phase disconnection switch F7 connects the other end of short circuit busbar 202, second end linked reactor 300.
Compare with above-described embodiment, the difference of the present embodiment is only: the Triple Pole Double-Throw switch F1 in above-described embodiment is replaced with two three-phase disconnection switch, be connected with rectifier transformer 201 and short circuit busbar 202 respectively, by optionally closing, disconnecting different three-phase disconnection switch, realize that in rectifier transformer 201 and short circuit busbar 202 is linked into AC to power between circuit breaker Q F100 and reactor 300, and then realize the ice-melt to transmission line.Its concrete operating principle, with identical in above-described embodiment, opened for which kind of situation to select which three-phase disconnection switch in or closed detailed process, is repeated no more here.
Another embodiment
On the basis of above-described embodiment, refer to Fig. 7, it illustrates the another kind of structural representation of a kind of DC de-icing device provided by the invention, Fig. 1 basis can also comprise the bank of filters 600 that the circuit breaker Q F100 that to power with AC is connected, for reactive power compensation and harmonics restraint.
In actual deicing processes, DC de-icing device can produce reactive power and harmonic wave in running.Reactive power causes the work efficiency drop of DC de-icing device, the introduction of harmonic wave may inject electrical network, cause serious harmonic pollution, by circuit breaker Q F100 side configuration bank of filters 600 of powering at AC, the suppression of compensation to reactive power and harmonic wave can be realized.
In the present embodiment, consider the transience of ice-melt, bank of filters 600 can determine whether configure according to concrete applied environment.When DC de-icing device does not use as ice-melt, bank of filters 600 also can be exchanged into static passive compensation device and runs.
Meanwhile, the invention also discloses a kind of direct current ice melting method, be applied in above-mentioned DC de-icing device, refer to Fig. 8, it illustrates the flow chart of a kind of direct current ice melting method provided by the invention, comprising:
Step 101: the length judging DC ice-melting.
Step 102: when the length of DC ice-melting is positioned at the first length range, control converter 200 and select the first connected mode, wherein, first connected mode is the rectifier transformer 201 in converter 200 is linked into AC power between circuit breaker Q F100 and reactor 300, to power circuit breaker Q F100 and reactor 300 to be communicated with AC;
When the length of DC ice-melting is positioned at the second length range, control converter 200 and select the second connected mode, wherein, second connected mode is the short circuit busbar 202 in converter 200 is linked into AC power between circuit breaker Q F100 and reactor 300, to power circuit breaker Q F100 and reactor 300 to be communicated with AC, wherein the initial value of the second length range is greater than the stop value of the first length range.
In the present embodiment, first length range and the second length range can by artificial settings, such as: the length being set in the transmission line of below 220KV is the first length range, in the first length range, the rectifier transformer 201 in converter 200 being linked into AC powers between circuit breaker Q F100 and reactor 300, be the second length range in the length of the transmission line of more than 220KV, in the second length range, the short circuit busbar 202 in converter 200 be linked into AC and power between circuit breaker Q F100 and reactor 300.
In the present embodiment, operator is according to the actual length scale needing the transmission line of ice-melt, control converter 200 is selected that rectifier transformer 201 or short circuit busbar 202 are linked into AC and is powered between circuit breaker Q F100 and reactor 300, carries out ice-melt to meet to the transmission line of different length.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above a kind of DC de-icing device provided by the present invention and method are described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. a DC de-icing device, comprise: AC is powered circuit breaker Q F, reactor, the rectifier be connected with described reactor and the knife switch that is connected with described rectifier, it is characterized in that, also comprise: be connected to described AC and power between circuit breaker Q F and described reactor, for realizing the converter to different length transmission line de-icing, wherein, described converter comprises: rectifier transformer, short circuit busbar and switch; Wherein,
Described rectifier transformer and described short circuit busbar are connected in parallel in described converter;
Described switch is used in described rectifier transformer and described short circuit busbar is linked into described AC powers between circuit breaker Q F and described reactor, to power circuit breaker Q F and described reactor to be communicated with described AC.
2. device according to claim 1, is characterized in that, described switch comprises Triple Pole Double-Throw K switch 1 and Triple Pole Double-Throw K switch 2; Wherein,
The first end of described Triple Pole Double-Throw K switch 1 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer or one end of described short circuit busbar;
The first end of described Triple Pole Double-Throw K switch 2 connects described reactor, and the second end connects the output of described rectifier transformer or the other end of described short circuit busbar.
3. device according to claim 1, is characterized in that, described switch comprises Triple Pole Double-Throw switch F1, three-phase disconnection switch F2 and three-phase disconnection switch F3; Wherein,
The first end of described Triple Pole Double-Throw switch F1 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer or one end of described short circuit busbar;
The first end of described three-phase disconnection switch F2 connects described reactor, and the second end connects the output of described rectifier transformer;
The first end of described three-phase disconnection switch F3 connects described reactor, and the second end connects the other end of described short circuit busbar;
Or
The first end of described three-phase disconnection switch F2 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer;
The first end of described three-phase disconnection switch F3 connects described AC and to power circuit breaker Q F, and the second end connects one end of described short circuit busbar;
The first end of described Triple Pole Double-Throw switch F1 connects described reactor, and the second end connects the output of described rectifier transformer or the other end of described short circuit busbar.
4. device according to claim 1, is characterized in that, described switch comprises three-phase disconnection switch F4, three-phase disconnection switch F5, three-phase disconnection switch F6 and three-phase disconnection switch F7; Wherein,
The first end of described three-phase disconnection switch F4 connects described AC and to power circuit breaker Q F, and the second end connects the input of described rectifier transformer;
The first end of described three-phase disconnection switch F5 connects the output of described rectifier transformer, and the second end connects described reactor;
The first end of described three-phase disconnection switch F6 connects described AC and to power circuit breaker Q F, and the second end connects one end of described short circuit busbar;
The first end of described three-phase disconnection switch F7 connects the other end of described short circuit busbar, and the second end connects described reactor.
5. the device according to any one of Claims 1-4, is characterized in that, also comprises:
To power the bank of filters that circuit breaker Q F is connected with described AC, for reactive power compensation and harmonics restraint.
6. a direct current ice melting method, is applied in the DC de-icing device as described in any one of claim 1 to 5, it is characterized in that, comprising:
Judge the length of DC ice-melting;
When the length of DC ice-melting is positioned at the first length range, control converter and select the first connected mode, described first connected mode is the rectifier transformer in converter is linked into AC power between circuit breaker Q F and reactor, to power circuit breaker Q F and reactor to be communicated with AC;
When the length of DC ice-melting is positioned at the second length range, control converter and select the second connected mode, described second connected mode is the short circuit busbar in converter is linked into AC power between circuit breaker Q F and reactor, to power circuit breaker Q F and reactor to be communicated with AC, the initial value of wherein said second length range is greater than the stop value of described first length range.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1348934A1 (en) * | 1984-07-13 | 1987-10-30 | Всесоюзный Научно-Исследовательский Институт Железнодорожного Транспорта | Arrangement for melting ice on parallel power transmission lines with unidirectional supply |
| JPH04281315A (en) * | 1991-03-06 | 1992-10-06 | Kansai Electric Power Co Inc:The | Snow and ice accretion prevention equipment for power transmission line |
| CN201590771U (en) * | 2009-06-18 | 2010-09-22 | 江西省电力科学研究院 | Multipurpose large-power controllable power source |
| RU2422963C2 (en) * | 2009-05-08 | 2011-06-27 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Device to melt silver thaw on wires and cables of overhead line (versions) |
| CN102208792A (en) * | 2011-03-10 | 2011-10-05 | 中国电力科学研究院 | System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1348934A1 (en) * | 1984-07-13 | 1987-10-30 | Всесоюзный Научно-Исследовательский Институт Железнодорожного Транспорта | Arrangement for melting ice on parallel power transmission lines with unidirectional supply |
| JPH04281315A (en) * | 1991-03-06 | 1992-10-06 | Kansai Electric Power Co Inc:The | Snow and ice accretion prevention equipment for power transmission line |
| RU2422963C2 (en) * | 2009-05-08 | 2011-06-27 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Device to melt silver thaw on wires and cables of overhead line (versions) |
| CN201590771U (en) * | 2009-06-18 | 2010-09-22 | 江西省电力科学研究院 | Multipurpose large-power controllable power source |
| CN102208792A (en) * | 2011-03-10 | 2011-10-05 | 中国电力科学研究院 | System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device |
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