CN103199477A - Circuit alternating current (AC) ice melting method and circuit AC ice melting device - Google Patents
Circuit alternating current (AC) ice melting method and circuit AC ice melting device Download PDFInfo
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- CN103199477A CN103199477A CN2013101340646A CN201310134064A CN103199477A CN 103199477 A CN103199477 A CN 103199477A CN 2013101340646 A CN2013101340646 A CN 2013101340646A CN 201310134064 A CN201310134064 A CN 201310134064A CN 103199477 A CN103199477 A CN 103199477A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
This invention provides a circuit alternating current (AC) ice melting method and a circuit AC ice melting device, the circuit AC ice melting device is connected at one end of an ice melting circuit, the other end of the ice melting circuit is connected with an ice melting power source, the circuit AC ice melting device comprises a control part and an impedance compensation part, the impedance compensation part comprises an inductive impedance compensation sub-circuit and a capacitive impedance compensation sub-circuit which are connected at one end of the ice melting circuit, signal input of the control part comes from the ice melting circuit, and a signal output end of the control part is connected to the impedance compensation part. According to parameter situations of the ice melting power supply and the ice melting circuit, the control part per-estimates ice a melting current of the ice melting circuit, a long circuit and a short circuit are preliminarily judged according to a comparative result of the pre-estimated ice melting current and an ice melting current target value, then the inductive impedance compensation sub-circuit and/or the capacitive impedance compensation sub-circuit are/is controlled to fall in, through adjustment of an impedance value of the inductive impedance compensation sub-circuit, and the ice melting current in the ice melting circuit is enabled to reach a pre-set range of the ice melting current target value until ice melting is completed.
Description
Technical field
The present invention relates to reactive power compensation technology and line ice-melting technical field, more particularly, relate to a kind of circuit and exchange de-icing method and device.
Background technology
The sleet raindrop condense on the electric wire, form the circuit icing.Icing increases conductor load, and for the high-tension bus-bar of long distance powedr transmission, icing has strengthened the iron tower heavy burden.Serious icing makes these leads of the unable support of iron tower and collapses, so cause large-area power breakdown, causes great economic loss and social influence.Therefore, deicing is to guarantee the unimpeded unique way of electrical network.
Conventional circuit exchanges de-icing method: under other equipment normal operation, the stoppage in transit DC ice-melting, terminal shortcircuit with DC ice-melting, the other end selects the appropriate system power supply as the ice-melt power supply, the control circuit breaker carries out full voltage to the three-phase shortcircuit circuit and impacts combined floodgate, makes DC ice-melting heating ice-melt by short circuit current as ice melting current.As shown in Figure 1, a kind of circuit exchanges ice-melt typical wiring figure in the prior art, one end of DC ice-melting 10 is by three-phase bar-bar 11 short circuits, and by earthed switch 12 ground connection, the other end of DC ice-melting 10 is connected with power source bus 13, and main transformer 14 connects DC ice-melting 10 as the ice-melt power supply by power source bus 13.As shown in Figure 2, the equivalent circuit diagram of winding diagram shown in Figure 1 comprises: main transformer 14 equivalences are ice-melt power supply U
S, the equiva lent impedance of DC ice-melting 10 is R+jX
LSystem power supply adopts fixing main transformer 14 as ice-melt power supply U
S, actual track different in size, each circuit equiva lent impedance R+jX
LAlso corresponding difference, therefore, each bar link tester is crossed ice melting current I that the mode of short circuit obtains with regard to corresponding difference.The ice melting current of short-term road may be very big, and the required ice melting current of DC ice-melting produces system easily and impacts and line impairment head and shoulders above; The ice melting current of long transmission line may be very little, is far smaller than the required ice melting current of DC ice-melting, do not have the effect of ice-melt.So need carry out the DC ice-melting impedance matching at the circuit of different length, so that ice melting current is not having under the situation of influence system, satisfy the requirement of ice-melt.
In a word, existing circuit exchanges de-icing method, and long transmission line and short-term road can not be taken into account during as DC ice-melting simultaneously, and impedance matching is dumb, complex operation, and efficient is low.
Summary of the invention
In view of this, the invention provides a kind of circuit and exchange de-icing method and device, the impedance matching when taking into account long transmission line and short-term road as DC ice-melting simultaneously, easy and simple to handle, the efficient height.
A kind of circuit exchanges de-icing method, be applied to circuit and exchange deicing device, described circuit exchanges the end that deicing device connects DC ice-melting, the other end of described DC ice-melting connects the ice-melt power supply, described circuit exchanges deicing device and comprises control section and impedance-compensated part, wherein, described impedance-compensated part comprises emotional resistance compensation branch road and capacitive reactances compensation branch road, described emotional resistance compensation branch road and described capacitive reactances compensation branch road are connected in an end of described DC ice-melting, the emotional resistance of described emotional resistance compensation branch road is adjustable, and before described DC ice-melting ice-melt, described emotional resistance compensation branch road and described capacitive reactances compensation branch road all do not come into operation; Described DC ice-melting is taken from the signal input of described control section, and signal exports described impedance-compensated part to, moves back and impedance adjustment with the throwing of controlling described emotional resistance compensation branch road and/or described capacitive reactances compensation branch road;
Described method comprises:
Described control section is according to the parameter of described ice-melt power supply and described DC ice-melting, and pre-estimation goes out the pre-estimation ice melting current of described DC ice-melting;
Described pre-estimation ice melting current and ice melting current desired value are compared, judge that whether described pre-estimation ice melting current is greater than described ice melting current desired value;
If described pre-estimation ice melting current is bigger than described ice melting current desired value, then control drops into described emotional resistance compensation branch road, described DC ice-melting is carried out the emotional resistance compensation;
If described pre-estimation ice melting current is littler than described ice melting current desired value, then control drops into described emotional resistance compensation branch road and described capacitive reactances compensation branch road, described DC ice-melting is carried out the capacitive reactances compensation;
Described control section is regulated described emotional resistance compensation branch impedance, so that the pre-estimation ice melting current in the described DC ice-melting reaches the preset range of described ice melting current desired value, finishes up to ice-melt.
A kind of circuit exchanges deicing device, be applied to exchange the ice-melt loop, described interchange ice-melt loop comprises DC ice-melting, ice-melt power supply, and described circuit exchanges the end that deicing device connects described DC ice-melting, and the other end of described DC ice-melting connects described ice-melt power supply;
Described circuit exchanges deicing device and comprises control section and impedance-compensated part;
Wherein, described impedance-compensated part comprises emotional resistance compensation branch road and capacitive reactances compensation branch road, described emotional resistance compensation branch road and described capacitive reactances compensation branch road are connected in an end of described DC ice-melting, the emotional resistance of described emotional resistance compensation branch road is adjustable, and before described DC ice-melting ice-melt, described emotional resistance compensation branch road and described capacitive reactances compensation branch road all do not come into operation;
Described DC ice-melting is taken from the signal input of described control section, and signal exports described impedance-compensated part to, moves back and impedance adjustment with the throwing of controlling described emotional resistance compensation branch road and/or described capacitive reactances compensation branch road;
Described control section is used for, and according to the parameter situation of described ice-melt power supply and described DC ice-melting, pre-estimation goes out the pre-estimation ice melting current of described DC ice-melting, and described pre-estimation ice melting current and described ice melting current desired value are compared; When described pre-estimation ice melting current was bigger than described ice melting current desired value, control dropped into described emotional resistance compensation branch road, described DC ice-melting is carried out the emotional resistance compensation; Otherwise control drops into described emotional resistance compensation branch road and described capacitive reactances compensation branch road, described DC ice-melting is carried out the capacitive reactances compensation; And regulate described emotional resistance compensation branch impedance, so that the pre-estimation ice melting current in the described DC ice-melting reaches the preset range of described ice melting current desired value, finish up to ice-melt.
Preferably, described ice-melt power supply is the main transformer that is connected by power source bus with described DC ice-melting one end.
Preferably, described emotional resistance compensation branch road comprises first switch and the magnet controlled reactor that is connected in series, described control section is by the closed or disconnection of described first switch of control, with the input of controlling described emotional resistance compensation branch road with withdraw from, and the emotional resistance of regulating and controlling emotional resistance compensation branch road.
Preferably, described capacitive reactances compensation branch road comprises second switch and the capacitor that is connected in series, and described control section is by the closed of the described second switch of control or disconnect, with the input of controlling described capacitive reactances compensation branch road with withdraw from.
From above-mentioned technical scheme as can be seen, the invention provides a kind of circuit and exchange de-icing method and device, circuit exchanges the end that deicing device connects DC ice-melting, the other end of DC ice-melting connects the ice-melt power supply, circuit exchanges deicing device and comprises control section and impedance-compensated part, impedance-compensated part comprises emotional resistance compensation branch road and the capacitive reactances compensation branch road that is connected in DC ice-melting one end, DC ice-melting is taken from the signal input of control section, and the signal of control section exports impedance-compensated part to.Control section is according to the parameter situation of ice-melt power supply and DC ice-melting, pre-estimation goes out the pre-estimation ice melting current of DC ice-melting, comparative result according to this pre-estimation ice melting current and ice melting current desired value, long transmission line and short-term road are tentatively judged, controlling the throwing of emotional resistance compensation branch road and/or capacitive reactances compensation branch road then moves back, by changing the emotional resistance of emotional resistance compensation branch road, regulate the impedance of DC ice-melting, thereby make pre-estimation ice melting current in the DC ice-melting reach the preset range of ice melting current desired value, finish up to ice-melt.Impedance matching when the present invention has taken into account long transmission line and short-term road simultaneously as DC ice-melting, easy and simple to handle, the efficient height.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that a kind of circuit exchanges ice-melt typical wiring figure in the prior art;
Fig. 2 is the equivalent circuit diagram that a kind of circuit exchanges ice-melt typical wiring figure in the prior art;
A kind of circuit that Fig. 3 provides for the embodiment of the invention exchanges deicing device de-icing method schematic diagram;
Fig. 4 exchanges the de-icing method flow chart for a kind of circuit that the embodiment of the invention provides;
The structure principle chart of a kind of magnet controlled reactor that Fig. 5 provides for the embodiment of the invention;
A kind of circuit that Fig. 6 provides for the embodiment of the invention exchanges the equivalent circuit diagram of de-icing method.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Exchange de-icing method at existing line, the problem that long transmission line and short-term road can not be taken into account during as DC ice-melting simultaneously, as shown in Figure 3, a kind of circuit that the embodiment of the invention provides exchanges deicing device de-icing method schematic diagram, circuit exchanges the end that deicing device 100 is connected DC ice-melting 200, and the other end of DC ice-melting 200 connects ice-melt power supply 300.
Circuit exchanges deicing device 100 and comprises control section 110 and impedance-compensated part 120, wherein:
Impedance-compensated part 120 comprises emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC, emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC are connected in an end of DC ice-melting 200, the emotional resistance of emotional resistance compensation branch road MCR is adjustable, and before DC ice-melting 200 ice-melts, emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC all do not come into operation.
DC ice-melting 200 is taken from the signal input of control section 110, and signal exports impedance-compensated part 120 to, moves back and impedance adjustment with the throwing of control emotional resistance compensation branch road MCR and/or capacitive reactances compensation branch road FC.
Wherein, circuit interchange deicing device 100 can be the MSVC(MCR-type static var compensation installations based on the MSVC technology, magnet controlled reactor type static compensating device) device.
As shown in Figure 4, a kind of circuit that the embodiment of the invention provides exchanges the de-icing method flow chart, is applied to circuit shown in Figure 3 and exchanges in the deicing device 100, and described method comprises:
S100, control section 110 are according to the parameter of ice-melt power supply 300 and DC ice-melting 200, and pre-estimation goes out the pre-estimation ice melting current of DC ice-melting 200;
Wherein, the parameter of DC ice-melting 200 is resistance, reactance, electricity is led and susceptance, and the parameter of ice-melt power supply 300 comprises voltage, and then the pre-estimation ice melting current is the ratio of the impedance parameter of the voltage parameter of ice-melt power supply 300 and DC ice-melting 200.
S200, whether judge described pre-estimation ice melting current greater than the ice melting current desired value, if, execution in step S300 then; Otherwise, execution in step S400;
It will be appreciated by persons skilled in the art that by ice melting current makes DC ice-melting 200 heatings carry out ice-melt to DC ice-melting 200.If but ice melting current surpasses the maximum current that DC ice-melting 200 allows, DC ice-melting 200 will be damaged because ice melting current is excessive; If ice melting current does not reach the required ice melting current of DC ice-melting 200, just do not have the effect of ice-melt.Because the maximum permissible current of circuit is relevant with its circuit model, therefore, take all factors into consideration maximum permissible current value and its ice melting current value of DC ice-melting 200, can obtain the ice melting current desired value of DC ice-melting 200 correspondences of different model.By pre-estimation ice melting current and ice melting current desired value are compared, can tentatively judge this DC ice-melting 200 and be long transmission line or short-term road.When pre-estimation ice melting current during greater than the ice melting current desired value, judge that this DC ice-melting 200 is short-term road, need to increase the short-circuit loop impedance this moment, to reach the purpose of restriction ice melting current; When pre-estimation ice melting current during less than the ice melting current desired value, judge that this DC ice-melting 200 is long transmission line, need to reduce the short-circuit loop impedance this moment, to increase the ice melting current value, reach the effect of ice-melt.
S300, control drop into emotional resistance compensation branch road MCR, DC ice-melting 200 is carried out the emotional resistance compensation;
By above-mentioned narration as can be known, when the pre-estimation ice melting current is bigger than ice melting current desired value, judge that then DC ice-melting 200 is short-term road, drop into emotional resistance compensation branch road MCR this moment with the impedance of increase short-circuit loop, thereby reach the purpose of restriction ice melting current.
Wherein, the emotional resistance of emotional resistance compensation branch road MCR can be regulated.
S400, control drop into emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC, DC ice-melting 200 is carried out the capacitive reactances compensation;
By above-mentioned narration as can be known, when the pre-estimation ice melting current than ice melting current desired value hour, judge that then DC ice-melting 200 is long transmission line, drop into capacitive reactances compensation branch road FC this moment to reduce the short-circuit loop impedance.
But because the capacitive reactances among the capacitive reactances compensation branch road FC is unadjustable, when the capacitive reactances that increases in the short-circuit loop is too big, may reduces the short-circuit loop impedance greatly, and then make ice melting current excessive, DC ice-melting 200 is caused damage.Therefore, when dropping into capacitive reactances compensation branch road FC, drop into emotional resistance compensation branch road MCR again, regulate the emotional resistance of emotional resistance compensation branch road MCR, to offset too much capacitive reactances in the short-circuit loop, guarantee that DC ice-melting 200 can not cause damage to himself in the ice-melt.
Be understandable that, when the capacitive reactances compensation branch road FC that drops into just in time can satisfy the demand of DC ice-melting 200 capacitive reactancess compensation, the equiva lent impedance that the emotional resistance that drops into is compensated branch road MCR is adjusted to infinity, and emotional resistance compensation this moment branch road MCR equivalence is unloaded transformer.
Wherein, Fig. 3 middle impedance compensated part 120 comprises at least one capacitive reactances compensation branch road FC, when a capacitive reactances compensation branch road FC can not satisfy short-circuit loop impedance requirement in the short-circuit loop, can increase the bar number of the capacitive reactances compensation branch road FC that is connected in parallel according to actual needs, wherein, the capacitive reactances of every capacitive reactances compensation branch road FC can be different.
S500, control section 110 are regulated emotional resistance compensation branch road MCR impedance, so that the pre-estimation ice melting current in the DC ice-melting 200 reaches the preset range of ice melting current desired value, finish up to ice-melt.
In summary it can be seen, among the present invention, control section 110 is according to the parameter situation of ice-melt power supply 300 and DC ice-melting 200, pre-estimation goes out the pre-estimation ice melting current of DC ice-melting 200, comparative result according to this pre-estimation ice melting current and ice melting current desired value, long transmission line and short-term road are tentatively judged, control the input of emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC then, by regulating the resistance value of emotional resistance compensation branch road MCR, make pre-estimation ice melting current in the DC ice-melting reach the preset range of ice melting current desired value, finish up to ice-melt.Therefore, the impedance matching when the present invention has taken into account long transmission line and short-term road simultaneously as DC ice-melting, easy and simple to handle, the efficient height.
Embodiment is corresponding with said method, and the present invention also provides a kind of circuit to exchange deicing device.
As shown in Figure 3, a kind of circuit that the embodiment of the invention provides exchanges deicing device de-icing method schematic diagram, circuit exchanges deicing device 100 and is applied to exchange the ice-melt loop, exchange the ice-melt loop and comprise DC ice-melting 200, ice-melt power supply 300, circuit exchanges the end that deicing device 100 connects DC ice-melting 200, and the other end of DC ice-melting 200 connects ice-melt power supply 300;
Circuit exchanges deicing device 100 and comprises control section 110 and impedance-compensated part 120;
Wherein, impedance-compensated part 120 comprises emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC, emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC are connected in an end of DC ice-melting 200, the emotional resistance of described emotional resistance compensation branch road MCR is adjustable, and before DC ice-melting 200 ice-melts, emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC all do not come into operation.
DC ice-melting 200 is taken from the signal input of control section 110, and signal exports impedance-compensated part 120 to, moves back and impedance adjustment with the throwing of control emotional resistance compensation branch road MCR and/or capacitive reactances compensation branch road FC.
Wherein, emotional resistance compensation branch road MCR adopts delta connection or star-star connection (deciding according to system earth mode and actual needs) to be connected in DC ice-melting 200; Capacitive reactances compensation branch road FC adopts star-star connection to be connected in DC ice-melting 200.
Emotional resistance compensation branch road MCR comprises first K switch that is connected in series
LWith magnet controlled reactor L, capacitive reactances compensation branch road FC comprises the second switch K that is connected in series
CWith capacitor C.
Concrete, control section 110 is by control first K switch
LClosed and disconnected, with the input of control emotional resistance compensation branch road MCR with withdraw from; In like manner, control section 110 is by control second switch K
CClosed and disconnected, with the input of control capacitive reactances compensation branch road FC or withdraw from.
When pre-estimation ice melting current during less than the ice melting current desired value, judge that this DC ice-melting 200 is long transmission line, need to reduce the short-circuit loop impedance this moment, to increase the ice melting current value, reach the effect of ice-melt.Control section 100 control second switch K
CClosure to drop into capacitive reactances compensation branch road FC, is controlled first K switch simultaneously
LClosure is to drop into emotional resistance compensation branch road MCR.Because the capacitive reactances of capacitor C is non-adjustable among the capacitive reactances compensation branch road FC, and the emotional resistance of magnet controlled reactor L is adjustable among the emotional resistance compensation branch road MCR, therefore, when the capacitive reactances among the capacitive reactances compensation branch road FC is bigger than normal, by regulating the emotional resistance among the emotional resistance compensation branch road MCR, offset too much capacitive reactances, satisfy the demand of short-circuit loop impedance.Equally, when the capacitive reactances among the capacitive reactances compensation branch road FC is less than normal, can suitably increase the bar number of capacitive reactances compensation branch road FC in parallel according to the demand of short-circuit loop impedance, to increase capacitive reactances, satisfy the demand of short-circuit loop impedance.
As shown in Figure 5, the structure principle chart of a kind of magnet controlled reactor that the embodiment of the invention provides, as can be seen from the figure, the iron core of magnet controlled reactor is split into two half identical iron cores, the length of this two and half iron core is all identical with area of section, the small bore section that it is L that the centre of each half iron core has a length (wherein, small bore is less than the cross section of iron core), when each half iron core column coil total number of turns is N, on half iron core, following symmetry respectively is full of the winding of N/2, and on each winding, down a tapping ratio being arranged respectively is the tap of δ (δ=1.5%～3%), be connected to controllable silicon VT1 and controllable silicon VT2 between the tap respectively, on different half iron cores, be connected in parallel to electrical network after following two winding interconnections, diode VD is across on the intersection end points.During work, the small bore section is in saturation condition, and all the other sections are the unsaturation linear condition.In the power frequency period, change the triggering and conducting angle of controllable silicon VT1 and controllable silicon VT2, produce the DC control electric current of different sizes, thereby change the magnetic saturation degree of small bore iron leg core, the capacity of smooth adjustment magnet controlled reactor.
In conjunction with Fig. 3 and Fig. 6, as shown in Figure 3, the main transformer 320 that ice-melt power supply 300 is connected by power source bus 310 for DC ice-melting 200 1 ends.
As shown in Figure 6, the circuit that a kind of and Fig. 3 that the embodiment of the invention provides is corresponding exchanges the equivalent circuit diagram of de-icing method, comprising: main transformer 320 equivalences are ice-melt power supply U
S, the equiva lent impedance of DC ice-melting 200 is R+jX, first K switch of emotional resistance compensation branch road MCR equivalence for being connected in series
LEquiva lent impedance jX with magnet controlled reactor L
L, the second switch K of capacitive reactances compensation branch road FC equivalence for being connected in series
CEquiva lent impedance-jX with capacitor C
CThe main transformer 320 that system power supply is fixed is as ice-melt power supply U
S, make ice-melt power supply U
SVoltage be fixed value, when needs increase impedance in the DC ice-melting, control first K switch by control section
LClosure, second switch K
CDisconnect, to regulate the equiva lent impedance jX of magnet controlled reactor L
LValue makes ice melting current I in the DC ice-melting 200 reach the preset range of ice melting current desired value, reaches the effect of ice-melt; When needs reduce impedance in the DC ice-melting, control first K switch by control section
LWith second switch K
CAll closed, to regulate the equiva lent impedance jX of magnet controlled reactor L
LValue so that the ice melting current I in the DC ice-melting 200 reaches the preset range of ice melting current desired value, reaches the effect of ice-melt.
In summary it can be seen, among the present invention, control section 110 is according to the parameter situation of ice-melt power supply 300 and DC ice-melting 200, pre-estimation goes out the pre-estimation ice melting current of DC ice-melting 200, comparative result according to this pre-estimation ice melting current and ice melting current desired value, long transmission line and short-term road are tentatively judged, control the input of emotional resistance compensation branch road MCR and capacitive reactances compensation branch road FC then, by regulating emotional resistance compensation branch road MCR resistance value, make pre-estimation ice melting current in the DC ice-melting reach the preset range of ice melting current desired value, finish up to ice-melt.Therefore, the impedance matching when the present invention has taken into account long transmission line and short-term road simultaneously as DC ice-melting, easy and simple to handle, the efficient height.
Be understandable that when not needing namely under the normal mode that circuit carried out ice-melt, circuit exchanges deicing device 100 and can be used as dynamic reactive compensation device and run on system, with the no-power vacancy of bucking-out system.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a circuit exchanges de-icing method, be applied to circuit and exchange deicing device, it is characterized in that, described circuit exchanges the end that deicing device connects DC ice-melting, the other end of described DC ice-melting connects the ice-melt power supply, described circuit exchanges deicing device and comprises control section and impedance-compensated part, wherein, described impedance-compensated part comprises emotional resistance compensation branch road and capacitive reactances compensation branch road, described emotional resistance compensation branch road and described capacitive reactances compensation branch road are connected in an end of described DC ice-melting, the emotional resistance of described emotional resistance compensation branch road is adjustable, and before described DC ice-melting ice-melt, described emotional resistance compensation branch road and described capacitive reactances compensation branch road all do not come into operation; Described DC ice-melting is taken from the signal input of described control section, and signal exports described impedance-compensated part to, moves back and impedance adjustment with the throwing of controlling described emotional resistance compensation branch road and/or described capacitive reactances compensation branch road;
Described method comprises:
Described control section is according to the parameter of described ice-melt power supply and described DC ice-melting, and pre-estimation goes out the pre-estimation ice melting current of described DC ice-melting;
Described pre-estimation ice melting current and ice melting current desired value are compared, judge that whether described pre-estimation ice melting current is greater than described ice melting current desired value;
If described pre-estimation ice melting current is bigger than described ice melting current desired value, then control drops into described emotional resistance compensation branch road, described DC ice-melting is carried out the emotional resistance compensation;
If described pre-estimation ice melting current is littler than described ice melting current desired value, then control drops into described emotional resistance compensation branch road and described capacitive reactances compensation branch road, described DC ice-melting is carried out the capacitive reactances compensation;
Described control section is regulated described emotional resistance compensation branch impedance, so that the pre-estimation ice melting current in the described DC ice-melting reaches the preset range of described ice melting current desired value, finishes up to ice-melt.
2. a circuit exchanges deicing device, be applied to exchange the ice-melt loop, described interchange ice-melt loop comprises DC ice-melting, ice-melt power supply, it is characterized in that, described circuit exchanges the end that deicing device connects described DC ice-melting, and the other end of described DC ice-melting connects described ice-melt power supply;
Described circuit exchanges deicing device and comprises control section and impedance-compensated part;
Wherein, described impedance-compensated part comprises emotional resistance compensation branch road and capacitive reactances compensation branch road, described emotional resistance compensation branch road and described capacitive reactances compensation branch road are connected in an end of described DC ice-melting, the emotional resistance of described emotional resistance compensation branch road is adjustable, and before described DC ice-melting ice-melt, described emotional resistance compensation branch road and described capacitive reactances compensation branch road all do not come into operation;
Described DC ice-melting is taken from the signal input of described control section, and signal exports described impedance-compensated part to, moves back and impedance adjustment with the throwing of controlling described emotional resistance compensation branch road and/or described capacitive reactances compensation branch road;
Described control section is used for, and according to the parameter situation of described ice-melt power supply and described DC ice-melting, pre-estimation goes out the pre-estimation ice melting current of described DC ice-melting, and described pre-estimation ice melting current and described ice melting current desired value are compared; When described pre-estimation ice melting current was bigger than described ice melting current desired value, control dropped into described emotional resistance compensation branch road, described DC ice-melting is carried out the emotional resistance compensation; Otherwise control drops into described emotional resistance compensation branch road and described capacitive reactances compensation branch road, described DC ice-melting is carried out the capacitive reactances compensation; And regulate described emotional resistance compensation branch impedance, so that the pre-estimation ice melting current in the described DC ice-melting reaches the preset range of described ice melting current desired value, finish up to ice-melt.
3. device according to claim 2 is characterized in that, described ice-melt power supply is the main transformer that is connected by power source bus with described DC ice-melting one end.
4. device according to claim 2, it is characterized in that, described emotional resistance compensation branch road comprises first switch and the magnet controlled reactor that is connected in series, described control section is by the closed or disconnection of described first switch of control, with the input of controlling described emotional resistance compensation branch road with withdraw from, and the emotional resistance of regulating and controlling emotional resistance compensation branch road.
5. device according to claim 2, it is characterized in that, described capacitive reactances compensation branch road comprises second switch and the capacitor that is connected in series, and described control section is by the closed of the described second switch of control or disconnect, with the input of controlling described capacitive reactances compensation branch road with withdraw from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310134064.6A CN103199477B (en) | 2013-04-17 | 2013-04-17 | A kind of circuit exchanges de-icing method and device |
Applications Claiming Priority (1)
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| CN104577927A (en) * | 2015-01-21 | 2015-04-29 | 武汉大学 | Self-adaption composite heating power ice melting cooperating method |
| CN104567983A (en) * | 2015-01-08 | 2015-04-29 | 国家电网公司 | Phytotron de-icing test platform for extra-high voltage divided conductors |
| CN104701797A (en) * | 2015-04-07 | 2015-06-10 | 国家电网公司 | 10kV distribution network line alternating current ice melting method |
| CN107147068A (en) * | 2017-07-20 | 2017-09-08 | 国网四川省电力公司电力科学研究院 | The distribution line AC ice melting device and method of a kind of tunable capacitor series compensation |
| CN107359544A (en) * | 2017-08-30 | 2017-11-17 | 国网湖南省电力公司 | Exchange de-icing method for agriculture distribution line |
| CN109449852A (en) * | 2018-03-23 | 2019-03-08 | 国网浙江省电力公司丽水供电公司 | A kind of distribution line de-icing method of non-power loss mode |
| CN112564010A (en) * | 2020-12-07 | 2021-03-26 | 广东电网有限责任公司清远供电局 | Micro-grid ice melting current control device based on novel magnetically controlled adjustable reactor and control method thereof |
| CN113013883A (en) * | 2021-03-09 | 2021-06-22 | 国网浙江省电力有限公司湖州供电公司 | Mobile power flow control and ice melting system and control method |
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| CN104535842A (en) * | 2015-01-04 | 2015-04-22 | 云南电网有限责任公司电力科学研究院 | Converter station grounding grid surge impedance testing method based on artificial short-circuit test |
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| CN104567983A (en) * | 2015-01-08 | 2015-04-29 | 国家电网公司 | Phytotron de-icing test platform for extra-high voltage divided conductors |
| CN104577927A (en) * | 2015-01-21 | 2015-04-29 | 武汉大学 | Self-adaption composite heating power ice melting cooperating method |
| CN104577927B (en) * | 2015-01-21 | 2017-01-25 | 武汉大学 | Self-adaption composite heating power ice melting cooperating method |
| CN104701797A (en) * | 2015-04-07 | 2015-06-10 | 国家电网公司 | 10kV distribution network line alternating current ice melting method |
| CN107147068A (en) * | 2017-07-20 | 2017-09-08 | 国网四川省电力公司电力科学研究院 | The distribution line AC ice melting device and method of a kind of tunable capacitor series compensation |
| CN107359544A (en) * | 2017-08-30 | 2017-11-17 | 国网湖南省电力公司 | Exchange de-icing method for agriculture distribution line |
| CN109449852A (en) * | 2018-03-23 | 2019-03-08 | 国网浙江省电力公司丽水供电公司 | A kind of distribution line de-icing method of non-power loss mode |
| CN112564010A (en) * | 2020-12-07 | 2021-03-26 | 广东电网有限责任公司清远供电局 | Micro-grid ice melting current control device based on novel magnetically controlled adjustable reactor and control method thereof |
| WO2022121095A1 (en) * | 2020-12-07 | 2022-06-16 | 广东电网有限责任公司清远供电局 | Microgrid ice-melting current control apparatus based on new magnetically controlled adjustable reactor, and control method thereof |
| CN113013883A (en) * | 2021-03-09 | 2021-06-22 | 国网浙江省电力有限公司湖州供电公司 | Mobile power flow control and ice melting system and control method |
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