CN103915809B - A kind of alternating current circuit for multiple fission conductor does not have a power failure de-icing method and device thereof - Google Patents
A kind of alternating current circuit for multiple fission conductor does not have a power failure de-icing method and device thereof Download PDFInfo
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Abstract
The invention discloses the de-icing method of the alternating current circuit of a kind of multiple fission conductor, all connect on each phase line in the middle part of line ice-melting section at least one ice-melt current transformer, every ice-melt current transformer is at least provided with two groups of first siding rings and least one set second siding ring, two groups of first siding rings seal in and make this phase current divide two-way to flow through two groups of first siding rings secondary current of inducting in second siding ring in the middle part of a phase line, second siding ring through tap or have load actuator output, the rectified loop of alternating current of its output loads on the ice-melt loop formation ice-melt circulation that this phase line many oidiospores wire is constituted after becoming DC current, after controlling the caloric value superposition of ice-melt circulation and the load current of circuit own, reach to protect line or ice-melt effect.The deicing device split-phase made hangs on the middle part of three-phase high-voltage circuit, runs with high-tension line isoelectric level, and the insulating requirements of device is low, volume is little, and cost is low, will not cause line-to-ground and phase-to phase fault.
Description
Technical field
The present invention relates to de-icing method and the electric device thereof of a kind of power circuit, particularly a kind of for right
The alternating current circuit of multiple fission conductor does not have a power failure the method for ice-melt and device thereof.
Background technology
Power circuit icing problem, is the major issue of countries in the world general concern.
Retrieving the de-icing technology of international and domestic power circuit, conventional is divided into two classes: one is to use manually
Deicing or mechanical deicing, de-icing work amount is big, and power off time is long, and loss of outage is big, and mechanical deicing side
Method does not has maturation.Equations of The Second Kind is thermal ice-melting, and thermal ice-melting is divided into again power failure ice-melt and the ice-melt two that do not has a power failure
Class.
The common method of power failure ice-melt has a following two:
1, ac short circuit up-flow ice-melt:
It is intended to DC ice-melting (such as 110KV or 220KV circuit) by 2～3 concatenated by switch operation
Coming, tandem link end man-made short-circuit, first section directly adds alternating current power supply (such as 10KV or 35KV) and enters
Row short circuit up-flow ice-melt.This is most common method in the ice-melt practice of southern all provinces, and its advantage is to be not required to
Wanting special equipment, production scene is very useful.Shortcoming is that the voltage that its short circuit applies power supply is non-adjustable,
During switching power supply, electrical network is impacted bigger.The bar number of series circuit is calculated in advance, series circuit
Selected difficulty, also needs to adjust protection definite value and protection investing method temporarily.In relevant several changes
Power station will be vacated the bus concatenation for DC ice-melting, make power system operating mode the weakest.
The switch operation time is long, it is difficult to tackle ice-melt requirement when a plurality of circuit occurs icing simultaneously.This method
Both having consumed meritorious during short circuit flows up, and consumed substantial amounts of idle again, reactive power consumption amount about has
4 times of merit consumption are very big on line voltage impact, so that cannot use at 500KV and Above Transmission Lines.
2, utilize the idle static compensation device of SVC as deicing device, circuit carried out direct-current short circuit ice-melt:
After SVC is idle static compensation device is as the rare ice damage that deicing device is that 2008 Nian Chun China occur,
Hunan Province DianKeYuan is developed, when after circuit generation icing, by line outage, and line end man-made short-circuit,
First on first section biphase, add the DC voltage through SVC type idle static compensation device rectification output, to circuit
Biphase carry out direct-current short circuit ice-melt, again third phase is carried out ice-melt after terminating.Have an advantage in that device is defeated
The DC voltage gone out is adjustable, is adaptable to the circuit of any length and electric pressure.With ac short circuit ice-melt
Compare and do not consume System Reactive Power.As ice-melting device during icing, at ordinary times as idle static compensation device,
Utilization rate of equipment and installations is high.Shortcoming is once to melt biphase, and the ice-melt time is long, switch operation and manually arranging
Short-circuit line workload is big, and to have a power failure and carry out.
Compare from the method for the conventional power failure ice-melt of both the above, it is found that DC ice melting only needs to provide
Produce the watt current of ohm heat, it is not necessary to offer reactive current, therefore the installed capacity ratio needed for DC ice melting
Exchange ice-melt is much smaller.
The method of ice-melt of not having a power failure mainly has following 3 classes:
1, system load flow is adjusted, the method strengthening DC ice-melting load:
By scheduling one circuit of excision, the load on two lines road is transferred to a circuit and makes its ice-melt,
Or make whole load currents of heavy ice line end transformer station all pass through a circuit of heavy icing area.The method
Using middle possible destruction system stability, actual effect is still needed and is studied further.Theoretic discussion at present is more,
Seldom there is the case of actual application.
2, beginning the seventies in last century, Baoji power supply administration, will on the circuit of 110KV double bundle conductor
The conductor spacer that the double bundle conductor of the part of path of icing the most easily occurs is replaced by insulation gap rod, in ice-melt
Section two ends use metal conductor spacer short circuit sub-conductor to constitute ice-melt loop, and portion builds ice-melt station in the line,
In the middle part of line ice-melting section, T connects transformator as ice-melt power supply, after blood pressure lowering, isolation, rectification, adds every
The ice-melt loop that phase twin bundled wire is constituted is formed ice-melt circulation, controls ice-melt circulation and circuit is originally born
Charged current caloric value superposition realizes not having a power failure ice-melt.This be currently the only the de-icing method that do not has a power failure,
Also it is a special case in ice-melt practice, because 110kv circuit uses solid conductor mostly, uses double points
Split is few.Owing to using on 110KV circuit, voltage is low, and method is simple.For higher voltage etc.
Level, as in the middle part of supertension and extra high voltage line, T connects ice-melt transformator, transformator is wanted with phase insulation over the ground
Asking high, volume and cost improve therewith, are also very easy to be connect transformator by T and cause line-to-ground and alternate
Fault.
3, Chinese patent application " hold concurrently SVG type reactive static plerosis locking device and user thereof by the ice-melt that do not has a power failure
Method " (CN201110410482.4 and CN201210545515.0), it is respectively adopted UPFC and SSSC skill
Art, melts by being adjusted reaching to the trend of a certain bar circuit in parallel circuit or loop network
Ice electric current, is simultaneously being not required to ice-melt season, changeable uses for the idle static compensation device of SVG type, a suit
Putting two kinds of functions, utilization rate of equipment and installations is greatly improved.For 110kv and following parallel circuit or loop grid
Ice-melt time, the capacity one that needed for it, needed for transformer station of installed capacity and its electric pressure, reactive static is mended
Cause.But the method is when the ice-melt of 220kv and Above Transmission Lines, and required installed capacity is with line voltage distribution
Rising and increase, economy is the best.
Based on above analysis, the problem of the ice-melt that can not had a power failure by power circuit is divided three classes and grinds respectively
Study carefully: one is parallel circuit or the ice-melt problem of loop network circuit of solid conductor, usually 10KV,
The transmission line of electricity of 35KV, 110KV, use above-mentioned Chinese patent application (CN201110410482.4 and
CN201210545515.0) method is feasible；Two is the radial supply line to customer power supply, it is impossible to constitute
Looped network and be the ice-melt problem of solid conductor circuit, usually 0.4KV, 10KV and 35KV distribution line,
There is presently no the ice-melt scheme that do not has a power failure of maturation；Three is the ice-melt problem that do not has a power failure of multiple fission conductor, main
If 220KV and above high pressure, supertension, UHV transmission line.
Therefore, the ice-melt problem that do not has a power failure solving multiple fission conductor is the problem that applicant studies.
Summary of the invention
Do not have a power failure the technical problem of ice-melt for multiple fission conductor, it is an object of the invention to, it is provided that a kind of
Do not have a power failure de-icing method and device thereof for the alternating current circuit of multiple fission conductor.
In order to realize above-mentioned task, the present invention takes following technical scheme to be achieved:
The de-icing method that do not has a power failure of a kind of alternating current circuit for multiple fission conductor, it is characterised in that should
Method is all connected on each phase line in the middle part of line ice-melting section at least one ice-melt current transformer, every
Ice-melt current transformer is at least provided with two groups of first siding rings and least one set second siding ring, two groups of primary sides
Coil seals in and makes this phase current divide two-way to flow through two groups of first siding rings and at secondary side in the middle part of a phase line
Coil is inducted secondary current, second siding ring through tap or have load actuator output, its output
The rectified loop of alternating current loads on what this phase line many oidiospores wire was constituted after becoming DC current
Ice-melt loop forms ice-melt circulation, controls ice-melt circulation and the caloric value superposition of the load current of circuit own
After, reach to protect line effect or ice-melt effect.
Above-mentioned ice-melt current transformer, common by least two group first siding rings and least one set second siding ring
It is wound on same iron core-closed upper composition, two groups of phases between primary winding and second siding ring therein
Insulation mutually, and contacted, when alternating current flows through two groups of side lines in the same direction by iron core-closed magnetic of setting up
During circle, at the iron core-closed equidirectional magnetic flux of middle generation and be bonded second siding ring, in second siding ring sense
Raw secondary current, second siding ring outlet arranges tap or has load actuator, to regulate secondary side line
The size of circle output electric current, second siding ring outlet can run by bringing onto load, or short circuit operation is in zero load
State, but can not open running, and:
When the second siding ring of ice-melt current transformer exports through multi-tap, switched by switching or electronic cutting
The selection closed, makes a multi-tap at least road in the conduction state, by rectified for the alternating current of output
Loop becomes DC current to load on ice-melt loop；
Or, when the second siding ring of ice-melt current transformer is in time having load actuator output, by the friendship of output
The stream rectified loop of electric current loads on ice-melt loop after becoming direct current；
Or, when an ice-melt current transformer has multiple second siding ring, multiple second siding rings can
To export after serial or parallel connection.
The deicing device that do not has a power failure of the alternating current circuit of multiple fission conductor prepared by employing said method, it is special
Levy and be, on each phase line in the middle part of line ice-melting section, by least one ice-melt current transformer, at least
One rectifier bridge, a set of controller and power pack, two groups of by-pass switches compositions, wherein, ice-melt unsteady flow
Device at least two groups of first siding rings and least one set second siding ring be wound on same iron core-closed on,
In the middle part of every phase line ice-melt section, after split conductor bundle is divided two groups of parallel connections, seal in ice-melt current transformer respectively
Two groups of first siding rings, make every phase line electric current divide two-way to flow through two groups of primary windings, for 2,4,6,
8, the split conductor bundle (L) of 10 ... even number, two groups of first siding rings seal in 1 respectively, 2,3,4,
5 oidiospore strands, for 3,5,7,9,11 ... odd number split conductor, first group of primary side
Coil (W1) seals in 2,3,4,5,6 oidiospore strands, and second group of first siding ring seals in
1,2,3,4,5 oidiospore strands, two groups of by-pass switches are connected in parallel on two, ice-melt current transformer respectively
First siding ring two ends, ice-melt current transformer second siding ring through tap or have load actuator output, and with
The AC electrical connection of rectifier bridge, the ice-melt loop that the DC side of rectifier bridge and multiple fission conductor form is electrically connected
Connecing, controller and power pack control the operation of whole device.
Or, above-mentioned do not have a power failure in deicing device, by two groups of two first siding ring two ends of current transformer
When way switch saves, the outlet at secondary coil arranges one group of by-pass switch.
The alternating current circuit for multiple fission conductor of the present invention does not have a power failure de-icing method and device thereof, brings
Provide the benefit that, ice-melt current transformer of connecting on every phase line in the middle part of line ice-melting section, it is provided that ice melting current,
Ice-melt current transformer, commutating circuit and control loop thereof and the power supply unit a whole set of ice-melting device that grades can all be adopted
Using unsettled layout, run with circuit isoelectric level, the insulating requirements of device is low, volume is little, cost is low.Whole
The set whole unsettled layout of ice-melting device, even if ice-melting device breaks down, the safe operation on circuit affects
Less.In prior art, portion T connects ice-melt transformator as rectifier power source in the line, easily causes circuit
Over the ground and phase-to phase fault.And concatenate ice-melt current transformer and package unit and run with circuit isoelectric level, will not produce
Raw line-to-ground and phase-to phase fault.Access ice-melt loop after ice-melt current transformer secondary side is rectified, play
The advantage that during DC ice melting, installed capacity is low, volume is little, cost is low.
Accompanying drawing explanation
Fig. 1 is the single-phase elementary diagram of double bundle conductor deicing device.
Fig. 2 is the fundamental diagram of ice-melt current transformer.
Fig. 3 is the deicing device wiring block diagram of conductors on quad bundled circuit.
Fig. 4 is the deicing device wiring block diagram of five split conductor circuits
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Detailed description of the invention
Multiple fission conductor, means that each phase conductor of circuit is made up of at least 2 and above sub-conductor
Strand, fixing with conductor spacer arrangement between sub-conductor bundle.Typically can have 2,3,4,5,6,7,
8, several split forms such as 9,10,11, in practical engineering application, extremely indivedual 110KV power transmission lines
Road and most of 220KV, 330KV transmission line of electricity use double division, and 500KV circuit uses 4 points mostly
Splitting, 750KV uses 6 divisions, and 1000KV uses 8 divisions.It is mostly even number division, uses odd number of points
Split several wires the most rare.
The ice-melt section of circuit, can be the total length of a circuit, it is possible to according to practical operation situation, selects
Cross over mountain area, air port etc. in the middle part of circuit to be prone to occur one section of circuit of icing as ice-melt section.
The ice-melt loop of oidiospore wire composition, means the conductor spacer of circuit many oidiospores wire ice-melt section
Employing insulation gap rod, makes to keep between many oidiospores wire insulation, uses at the two ends of line ice-melting section
Metal conductor spacer is by the loop checking installation of oidiospore wire electrical connection composition.When using whole piece circuit as ice-melt section
Time, whole piece circuit all uses insulation gap rod, the intrinsic electrical connection relying on circuit both sides is (general
Split conductor is connected as a single entity by the terminals of line outlet isolation switch) constitute ice-melt loop.
According to technical scheme, the de-icing method that do not has a power failure of the alternating current circuit of multiple fission conductor, it is somebody's turn to do
Method is all connected on each phase line in the middle part of line ice-melting section at least one ice-melt current transformer, and every melts
Ice current transformer is at least provided with two groups of first siding rings and least one set second siding ring, two groups of first siding rings
Seal in and in the middle part of a phase line, make this phase current divide two-way to flow through two groups of first siding rings and at second siding ring
In induct secondary current, second siding ring through tap or have load actuator output, the alternating current of its output
Flow through and load on the ice-melt that this phase line many oidiospores wire constituted after commutating circuit becomes DC current and return
Road forms ice-melt circulation, after controlling the caloric value superposition of ice-melt circulation and the load current of circuit own, reaches
Protect line effect or ice-melt effect.
The deicing device that do not has a power failure of the alternating current circuit of multiple fission conductor prepared by employing said method, at circuit
On each phase line in the middle part of ice-melt section, by least one ice-melt current transformer RB, at least one rectifier bridge
ZLQ, a set of controller and power pack KZQ, two groups of by-pass switch (P1, P2) compositions, wherein,
Ice-melt current transformer RB at least two groups of first siding rings (W1, W2) and least one set second siding ring
W0 be wound on same iron core-closed on, in the middle part of every phase line ice-melt section, split conductor bundle L is divided
Seal in two groups of first siding rings (W1, W2) of ice-melt current transformer RB after two groups of parallel connections respectively, make every phase
Line electricity flow point two-way flows through two groups of primary windings (W1, W2), for 2,4,6,8,10 ...
The split conductor bundle L of even number, two groups of first siding rings (W1, W2) seal in 1 respectively, 2,3,4,
5 oidiospore strand L, for 3,5,7,9,11 ... odd number split conductor, first group is once
Lateral coil W1 seals in 2,3,4,5,6 oidiospore strand L, second group of first siding ring W2
Seal in 1,2,3,4,5 oidiospore strand L, two groups of by-pass switch (P1, P2) parallel connections respectively
At two first siding ring (W1, W2) two ends of ice-melt current transformer RB, ice-melt current transformer RB secondary side
Coil W0 through tap or have load actuator output, and electrically connects with the AC of rectifier bridge ZLQ, whole
The ice-melt loop that the DC side of stream bridge ZLQ forms with multiple fission conductor L electrically connects, controller and power supply unit
KZQ is divided to control the operation of whole device.
Fig. 1 is the deicing device single-phase schematic diagram on double bundle conductor.L1, L2 represent double points an of phase
Split the two root wires (other of circuit is biphase to be not drawn into, and principle is identical) of circuit.G1, G2 are double points
Split the metal conductor spacer at ice-melt section selected by wire (part in the middle of circuit) two ends, for short circuit
Two split conductors L1, L2 constitute ice-melt loop, all use insulation gap rod (figure in the middle of ice-melt section circuit
In be not drawn into), if select whole piece circuit all as ice-melt loop, then on whole piece circuit all use insulation between
Every rod, rely on intrinsic electrical connection short circuit L1, the L2 at circuit double bundle conductor L1, L2 two ends to constitute and melt
Ice loop.W1, W2 are two that ice-melt current transformer RB is serially connected with in the middle part of double bundle conductor ice-melt section
Secondary lateral coil, W0 is second siding ring (the concrete tap of the ice-melt current transformer RB with 4 taps
Number can be arranged as required to).T1～T12 is controllable silicon, and D1, D2 are that (also can use can for commutation diode
Control silicon), T5～T12 is flat wave capacitor with D1, D2 composition chain type rectifier bridge ZLQ, C, and rectification exports
(i.e. left and right ice-melt loop resistance is equal to load on the middle part of ice-melt section that double bundle conductor L1, L2 constitute
Part, just can make the left and right two-way ice-melt circulation equal in magnitude), must during T5～the T12 work of commutating circuit
(turning on when the zero degree angle of flow) must be turned on by full angle, in case secondary coil cutout produces high pressure, work
In only select a road conducting, T5 and T6, T7 and T8 in figure, T9 and T10, T11 and T12 totally four tunnel,
Way can be set according to the number of tap.S1, T1, T2 and S2, T3, T4 respectively constitute by the of two groups
Way switch P1, P2, be used for the throwing to ice-melt current transformer RB primary winding W1, W2, cut.Controller
And power pack KZQ gathers line current and device respectively by two groups of Current Transmits 1, CT2
Ice melting current, its output signal controls the duty of S1, S2, T1～T12 respectively, and can pass through nothing
Line mode receives remote control instruction teletransmission status signal.
In Fig. 1, when in by-pass switch, S1 with S2 connects, two groups of primary sides of ice-melt current transformer RB
Coil W1, W2 are shorted, and both threads road L1, L2 are led directly to, and a whole set of deicing device is exiting state.
When deicing device to be put into, first allow after T1～T4 full angle conducting (pulse-triggered angle is zero), break
Switch S1 and S2, makes T1～T4 stop conducting the most again, and a point two-way is flow through unsteady flow by line current
First siding ring W1 and W2 of device RB, rectifier bridge can be according to the size of line current and be intended to load simultaneously
Ice melting current size, by selecting full angle conducting in T5～T12 Zhong mono-road to select second siding ring
The different tap outputs of W0, the tap that turn-on current output is big when line current is less, line current
The tap that time bigger, turn-on current output is little, purpose makes line transmission electric current superimposed with additional ice melting current
Effect reach guarantor's line effect set in advance or ice-melt effect.
When the deicing device that do not has a power failure of the alternating current circuit of multiple fission conductor exits, first full angle open T1～
T4 is by first siding ring (W1, W2) short circuit, then puts into switch S1 and switch S2 by ice-melt current transformer
First siding ring (W1, W2) short circuit of RB leads directly to, and makes T1～T4 stop conducting afterwards, and many divisions are led
The deicing device that do not has a power failure of the alternating current circuit of line is deactivated.
Certainly, it is possible to save by-pass switch P1 and P2 in Fig. 1, at ice-melt current transformer RB secondary line
The outlet of circle W0 arranges one group of by-pass switch P, and during connection, the secondary coil W0 of short circuit ice-melt current transformer makes
Current transformer RB is in no-load running state, and when by-pass switch P disconnects, ice-melt current transformer RB works in and melts
Ice-like state, is described in detail in Fig. 4 embodiment below.
When the deicing device that do not has a power failure of the alternating current circuit of the above-mentioned multiple fission conductor using the present invention is applied to
During other multiple fission conductor, for the even number division circuits such as 2,4,6,8,10, ice-melt current transformer RB
Two groups of primary windings W1, W2 can seal in 1,2,3,4,5 root wires respectively, for 3,5,
7, the odd number division circuit such as 9,11, first group of primary winding W1 can seal in 2,3,4,5,6 roots
Wire, second group of primary winding W2 can seal in 1,2,3,4,5 root wires, below in conjunction with other
Embodiment is described in detail.
Controller and power pack KZQ are made up of controller and power supply, it is contemplated that ice-melting device to be arranged on
In the middle part of circuit, area, remote mountains, and whole power supply often and controller need the same with ice-melting device whole
Unsettled layout, therefore power supply can be added photovoltaic charging by set of cells or arrange special current transformer
It is charged.Controller part KZQ is by Current Transmit 1, CT2 detection line current and ice-melt
Current transformer RB exports electric current, controls P1, P2 and T1～the duty of T12.Controller part is passed through
Wireless communication mode accepts distant place control instruction teletransmission status signal, also can be with icing of the prior art
Monitor system combined work.Controller and power pack KZQ are easily achieved according to prior art, the present invention
Do not do discussion emphasis.
The deicing device of the alternating current circuit of a whole set of multiple fission conductor on every phase line (ice-melt current transformer RB,
Bridge rectifier bridge ZLQ, by-pass switch P1 and P2, controller and power supply KZQ) all use built on stilts layout
Mode, package unit and power circuit run with current potential, and device and power circuit over the ground and alternate will not draw
Send out short trouble.Even if deicing device breaks down, also a circuit will not be run and produce big shadow
Ring.
Fig. 2 is the fundamental diagram of ice-melt current transformer RB.It is the core of deicing device, ice-melt current transformer
RB is actually special a, current transformer for power transmission type, and it is by least two group primary sides
Coil (W1, W2) and least one set second siding ring W0 are wound on same iron core-closed upper group jointly
Become, mutually insulated between two groups of primary windings (W1, W2) therein and second siding ring W0, and lead to
Cross iron core-closed magnetic of setting up to contact, when alternating current flows through two groups of first siding rings (W1, W2) in the same direction
Time, at the iron core-closed equidirectional magnetic flux of middle generation and be bonded second siding ring W0, at second siding ring W0
Inducting secondary current, second siding ring W0 outlet arranges tap or has load actuator, to regulate secondary
The size of lateral coil W0 output electric current, second siding ring W0 outlet can run by bringing onto load, or short circuit
Run on Light Condition, but can not open running, and:
When the second siding ring W0 of ice-melt current transformer exports through multi-tap, switched by switching or electronics
The selection of switch, makes a multi-tap at least road in the conduction state, by the alternating current of output through whole
Flowing back to road ZLQ becomes DC current to load on ice-melt loop；
Or, when the second siding ring W0 of ice-melt current transformer is in time having load actuator output, by output
Alternating current rectified loop ZLQ loads on ice-melt loop after becoming direct current；
Or, when an ice-melt current transformer has multiple second siding ring W0, multiple second siding rings
W0 can be to export after serial or parallel connection.
Two groups of first siding rings (W1, W2) and one group of second siding ring W0 in Fig. 2 are wound on jointly
One iron core-closed on, between coil mutually insulated by iron core set up magnetic contact.When often dividing circuit mutually
When the electric current I1 of sub-conductor divides two groups of first siding ring (W1, W2) that two-way flows through ice-melt current transformer RB,
Two first siding rings (W1, W2) are formed once after the magnetic flux in the same direction of iron core-closed middle generation is superimposed
Magnetic flux Φ 1, one time magnetic flux is bonded second siding ring W0 and produces secondary current I2 in second siding ring,
I2 produces secondary magnetic flux Φ 2, and first and second magnetic flux (Φ 1, Φ 2) is the most in opposite direction.Ice-melt
Current transformer (RB) is identical with operation of current transformers principle, and its secondary side does not allow open circuit, works as secondary side
During open running, second siding ring (W0) does not has electric current produce (I2=0), would not have secondary magnetic yet
Logical (Φ 2=0) balances each other with a magnetic flux, and magnetic flux Φ 1 can make iron core seriously generate heat scaling loss holding
Produce high voltage on the second siding ring W0 on road and jeopardize the safe operation of equipment.But ice-melt current transformer RB
Second siding ring W0 can be ice-melt unsteady flow when second siding ring W0 short circuit with short circuit operation (R=0)
The no-load running state of device RB, now magnetic flux Φ 1 and Φ 2 produced by second siding ring (W1, W2)
The magnetizing flux Φ 0 that after basic neutralisation, only one of which is the least, now second siding ring (W0) has electric current I2
But terminal voltage U2 is 0, and power is output as 0, the least magnetizing flux Φ 0 only maintains the magnetic hysteresis in iron core
Eddy-current loss and the copper loss of second siding ring W0.As current transformer, ice-melt current transformer (RB)
The size of middle Φ 0 decides the size of power transmission, (R > 0), secondary when there being load in secondary circuit
The electric current I2 of lateral coil W0 increases with load will slightly reduce (Φ 1=Φ 2+ Φ 0), and Φ 0 will increase,
Terminal voltage U2 of second siding ring W0 linearly raises, one with the increase of secondary circuit load resistance simultaneously
Secondary side voltage drop U1 is also by rising and meet I1 × U1=I2 × U2, now, and second siding ring (W0)
Output be I2 × U2 or (I2)2×R。
Ice-melt current transformer RB is identical with operation of current transformers principle, and difference is power to be transmitted
Varying in size, current transformer is used for measuring and protecting, and it is (general that its secondary circuit is both designed as small area analysis
1A～5A), secondary load little (a little Europe of generic zero) near short circuiting work state, its side line
The circle number of turn is less, and the number of turn of second siding ring is a lot, line footpath is thin, internal resistance is big.And ice-melt current transformer RB
Secondary circuit needs to be designed as big electric current and higher load resistor value, as 500KV circuit
(LGJ-400 × 4), when line transmission power is at 500MW, ice-melt current transformer second siding ring W0 needs defeated
Going out electric current about 1720A just can make circuit reach to protect line states (not freezing).The 500KV line of every 100km
The all-in resistance in the ice-melt loop that road every phase sub-conductor is formed about 2 ohm, the resistance of secondary coil is little, if
Will circuit through-put power at 600MW time, when every root wire has the ice melting current being equivalent to 800A,
The output of ice-melt current transformer RB is up to about 13MW.Therefore bis-output electric currents of ice-melt current transformer RB
The biggest, when line transmission load is less, ice melting current to be exported for second siding ring W0 will be big
In primary side current, the number of turn of first siding ring (W1, W2) is now higher than second siding ring W0's
The number of turn, once, the line footpath of second siding ring (W1, W2, W0) the thickest.
Prior art all uses transformator to use identical with current transformer principle as rectification source, the present invention
Current transformer does rectification source.The performance of transformator and current transformer is compareed by following table.
The first siding ring of ice-melt current transformer RB at least needs to arrange two groups.Because constituting ice-melt loop extremely
Need two groups of first siding rings (W1, W2) less.It addition, the alternating current that second siding ring (W0) exports
The DC loop-current loading on ice-melt loop after flowing through rectifying installation also flows through first siding ring (W1, W2),
Direct current flux in order to make DC loop-current produce in the core is cancelled out each other, first siding ring (W1, W2)
At least need two groups, must be even number set when more than two groups.Certainly preferred plan uses two groups of primary sides
Coil (W1, W2), manufactures and uses the simplest.And two DC output ends of deicing device, must
The same side (in left side in Fig. 1) of ice-melt current transformer must be loaded on, DC loop-current the most just can be made to pass through
The direct current flux produced in the core after two groups of first siding rings (W1, W2) is cancelled out each other, Yi Mianzhi
The direct current flux that stream electric current produces makes iron core generation magnetic saturation.
According to the size of current that first siding ring electric current and second siding ring are to be exported, design ice-melt unsteady flow
The relevant parameters such as the core dimensions of device RB, the turn ratio once and between second siding ring, line footpath.Line
LUSHEN number is different, and the parameter designing of ice-melt current transformer RB is different, and prior art easily realizes, therefore no longer
Describe in detail.
Fig. 3 is the deicing device wiring block diagram of conductors on quad bundled circuit.In figure the two of ice-melt current transformer RB
Group first siding ring (W1, W2) seals in a phase line (other biphase be not drawn into) middle part sub-conductor respectively
L1 and L2 is in parallel, and in the ice-melt loop constituted after L3 and L4 parallel connection, two ends, loop are spaced by metal
Rod G electrical connection, ice-melt section central conductor all uses insulation gap rod (being not drawn in figure).If it is right to be intended to
Whole piece circuit carries out ice-melt, and on circuit, all of conductor spacer all uses insulant, relies on circuit both sides
Intrinsic electrical connection short circuit sub-conductor constitutes ice-melt loop.In figure, the secondary side of ice-melt current transformer RB
Coil (W0) uses load actuator output, and rectified loop loads on ice-melt loop after becoming DC current
(left and right, ice-melt loop resistance equal part loads on two first siding rings (W1, W2) in figure at middle part
Left side).Controller (being not drawn in figure) controls have load actuator automatically to change tap joint position, regulation
The output electric current of second siding ring W0, to meet ice-melt needs.Two groups of by-pass switches (P1, P2), control
Device processed is identical with described in Fig. 1 with the operation principle of power pack (being not drawn in figure).Also can save in figure
The by-pass switch (P1, P2) of first siding ring (W1, W2) both sides, only at its second siding ring W0
Outlet arrange one group of by-pass switch P(in Fig. 4 example in detail narration).For other even number divisural line
3,4,5 root conductor in parallel such as 6,8,10 isotomy wires, can be in like manner two groups by road respectively
Seal in two groups of first siding rings (W1, W2) of ice-melt current transformer RB respectively.
Fig. 4 is the deicing device wiring block diagram of five split conductor circuits.In the middle part of line ice-melting section, by one
Ice-melt current transformer is sealed in after sub-conductor L1, L2, L3 parallel connection in phase line (other biphase be not drawn into)
The first siding ring W1 of RB, will seal in another group of ice-melt current transformer RB after sub-conductor L4, L5 parallel connection
First siding ring W2, ice-melt section two ends use the metal conductor spacer G ice-melt that is electrically connected to form by sub-conductor to return
Road, the conductor spacer on ice-melt section lead is replaced by insulation gap rod (being not drawn in figure), if by sliver
When road is as ice-melt end, all conductor spacers on circuit are replaced by insulation gap rod, rely on circuit both sides solid
There is electrical connection to be connected together at circuit two ends by five oidiospore wires and constitute ice-melt loop.In figure,
Second siding ring W0 exports through multi-tap, can control to select a road to divide by controller (being not drawn in figure)
Joint turns on, and the alternating current rectified loop ZLQ of output accesses ice-melt loop after becoming direct current, connects in figure
Entering in the left side of two groups of first siding rings (W1, W2) (can on right side, but must be also two groups of coils
The same side).In figure, by-pass switch P is arranged at the outfan of the second siding ring W0 of ice-melt current transformer RB,
For the switching to ice-melt current transformer RB, when by-pass switch P disconnects, ice-melt current transformer RB and the whole series
Device is in ice-melt duty, when by-pass switch P connects, and ice-melt current transformer (RB) secondary side line
Circle (W0) is shorted, and is now the no-load running state of ice-melt current transformer RB, a whole set of multiple fission conductor
The deicing device that do not has a power failure of alternating current circuit exit ice-melt duty.Now, second siding ring W0 pair
Outer without output, primary side line current flow through ice-melt current transformer RB first siding ring (W1, W2) and
Magnetic flux basic neutralisation produced by the short circuit current of second siding ring W0, ice-melt current transformer RB only can be at ferrum
Core only produces copper loss less on less open circuit loss and coil.Compared with Fig. 1 and Fig. 3 scheme,
Save two by-pass switches (P1, P2) in ice-melt current transformer RB primary winding (W1, W2), only exist
Second siding ring W0 outlet is provided with one group of by-pass switch P, and scheme is the simplest, but ice-melt current transformer
RB wants frequent charging operation.
For the circuit of 3,7,9,11 odd number multiple fission conductors, all can be according to above-mentioned principle, at circuit
In the middle part of ice-melt section, after 2,4,5,6 root conductor in parallel, seal in W1, by 1,3,4,5 roots
Sealing in W2 after conductor in parallel, other operation principle is identical.
Phase line every for 10KV, 35KV, 110KV is the circuit of solid conductor, can transform double points as
After splitting wire, the deicing device that do not has a power failure of the alternating current circuit re-using the multiple fission conductor of the present invention is carried out not
Power failure ice-melt.
Claims (3)
1. the de-icing method that do not has a power failure of the alternating current circuit of a multiple fission conductor, it is characterised in that the party
Method is all connected on each phase line in the middle part of line ice-melting section at least one ice-melt current transformer, and every melts
Ice current transformer is at least provided with two groups of first siding rings and least one set second siding ring, two groups of side lines
Circle seals in and makes this phase current divide two-way to flow through two groups of first siding rings and at secondary side line in the middle part of a phase line
Circle is inducted secondary current, second siding ring through tap or have load actuator output, the friendship of its output
The stream rectified loop of electric current becomes to load on after DC current that this phase line many oidiospores wire constituted melts
Ice loop forms ice-melt circulation, after controlling the caloric value superposition of ice-melt circulation and the load current of circuit own,
Reach to protect line effect or ice-melt effect；
Wherein, described ice-melt current transformer is by least two group first siding rings (W1, W2) and at least
Group second siding ring (W0) is wound on same iron core-closed upper composition jointly, therein two groups once
Mutually insulated between coil (W1, W2) and second siding ring (W0), and by iron core-closed foundation
Magnetic contacts, when alternating current flows through two groups of first siding ring (W1, W2) in the same direction, iron core-closed
The equidirectional magnetic flux of middle generation is also bonded second siding ring (W0), inducts secondary at second siding ring (W0)
Electric current, second siding ring (W0) outlet arranges tap or has load actuator, to regulate secondary side line
The size of circle (W0) output electric current, second siding ring (W0) outlet can run by bringing onto load, or short
Road runs on Light Condition, but can not open running, and:
When the second siding ring (W0) of ice-melt current transformer exports through multi-tap, switched by switching or
The selection of electrical switch, makes a multi-tap at least road in the conduction state, by the alternating current of output
Rectified loop becomes DC current to load on ice-melt loop；
Or, when the second siding ring (W0) of ice-melt current transformer is in time having load actuator output, by defeated
The rectified loop of alternating current gone out loads on ice-melt loop after becoming direct current；
Or, when an ice-melt current transformer has multiple second siding ring (W0), multiple secondary sides
Export after coil (W0) serial or parallel connection.
2. the ice-melt dress that do not has a power failure of the alternating current circuit of multiple fission conductor prepared by method described in claim 1
Put, it is characterised in that on each phase line in the middle part of line ice-melting section, by least one ice-melt unsteady flow
Device (RB), at least one rectifier bridge (ZLQ), a set of controller and power pack (KZQ), by two groups
Way switch (P1, P2) forms, wherein, ice-melt current transformer (RB) at least two groups of first siding rings (W1,
W2) and least one set second siding ring (W0) be wound on same iron core-closed on, melt at every phase line
In the middle part of stade, after two groups of parallel connections of split conductor bundle (L) point, seal in ice-melt current transformer (RB) respectively
Two groups of first siding rings (W1, W2), make every phase line electric current divide two-way flow through two groups of primary windings (W1,
W2), for 2,4,6,8, the split conductor bundle (L) of 10 ... even number, two groups of first siding rings (W1,
W2) seal in 1,2,3,4,5 oidiospore strands (L) respectively, for 3,5,7,9,11 ...
Odd number split conductor, first group of first siding ring (W1) seals in 2,3,4,5,6 oidiospore wires
Bundle (L), second group of first siding ring (W2) seals in 1,2,3,4,5 oidiospore strands (L),
Two groups of by-pass switches (P1, P2) be connected in parallel on respectively two first siding rings of ice-melt current transformer (RB) (W1,
W2) two ends, ice-melt current transformer (RB) second siding ring (W0) through tap or have load actuator output,
And electrically connect with the AC of rectifier bridge (ZLQ), the DC side of rectifier bridge (ZLQ) and multiple fission conductor
(L) the ice-melt loop electrical connection formed, controller and power pack (KZQ) control the fortune of whole device
OK.
3. the deicing device that do not has a power failure of the alternating current circuit of multiple fission conductor as claimed in claim 2, its
It is characterised by, the bypass that described ice-melt current transformer (RB) first siding ring (W1, W2) two ends are in parallel
Switch (P1, P2) is when saving, ice-melt current transformer (RB) second siding ring (W0) outfan also
Connection by-pass switch (P).
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| CN201410116926.7A CN103915809B (en) | 2014-03-26 | 2014-03-26 | A kind of alternating current circuit for multiple fission conductor does not have a power failure de-icing method and device thereof |
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| CN104567983B (en) * | 2015-01-08 | 2016-05-04 | 国家电网公司 | Extra-high voltage split conductor phjytotron ice-melt test platform |
| CN106207863A (en) * | 2016-09-26 | 2016-12-07 | 南京工程学院 | A kind of based on the THE UPFC de-icing method of synchronization paralleling device between electrical network |
| CN109038445B (en) * | 2018-08-23 | 2021-01-15 | 国网湖南省电力有限公司 | Voltage reduction capacitor-based live ice melting topological system and ice melting method thereof |
| CN109088384B (en) * | 2018-09-30 | 2023-11-10 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Overhead transmission line four-split conductor deicing shorting device |
| CN110535061B (en) * | 2019-07-15 | 2021-07-13 | 贵州电网有限责任公司 | Switching method for online ice melting transformer substation of power transmission and distribution line |
| CN113011013B (en) * | 2021-03-03 | 2023-04-28 | 贵州电网有限责任公司 | Grouping ice melting time calculation method for sub-conductors of high-voltage overhead transmission line |
| CN114530814B (en) * | 2022-04-15 | 2022-09-30 | 西南交通大学 | Direct-current deicing system for overhead contact system of electrified railway and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB850612A (en) * | 1957-11-12 | 1960-10-05 | British Insulated Callenders | Improvements in or relating to prevention of ice formation of high voltage overhead transmission lines |
| CN101286629A (en) * | 2008-02-13 | 2008-10-15 | 郑卫东 | A device for covering surface of melting wires, poles and insulators in transmission line with ice |
| CN201178282Y (en) * | 2008-04-17 | 2009-01-07 | 李杨扬 | Loaded operating ice melting system for high-voltage power transmission line |
| CN103166161A (en) * | 2013-04-15 | 2013-06-19 | 都匀供电局 | Method and device for adjusting output impedance of ice melting reactor |
-
2014
- 2014-03-26 CN CN201410116926.7A patent/CN103915809B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB850612A (en) * | 1957-11-12 | 1960-10-05 | British Insulated Callenders | Improvements in or relating to prevention of ice formation of high voltage overhead transmission lines |
| CN101286629A (en) * | 2008-02-13 | 2008-10-15 | 郑卫东 | A device for covering surface of melting wires, poles and insulators in transmission line with ice |
| CN201178282Y (en) * | 2008-04-17 | 2009-01-07 | 李杨扬 | Loaded operating ice melting system for high-voltage power transmission line |
| CN103166161A (en) * | 2013-04-15 | 2013-06-19 | 都匀供电局 | Method and device for adjusting output impedance of ice melting reactor |
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