CN201238183Y - Deicing mechanism by electrical pulse method for power transmission line - Google Patents

Abstract

The utility model discloses a deicing mechanism for deicing a transmission circuit through an electronic pulse method. The deicing mechanism comprises a silicon control rectifier (1), a high voltage capacitor (2) and a clamping diode (3); after the high voltage capacitor (2) and the clamping diode (3) are connected in parallel, a flowing-into end of a current is connected with the silicon control rectifier (1); the deicing mechanism is characterized in that after the clamping diode (3) are connected in parallel, the flowing-into end of the current is connected with the flowing-out end of the current of a coil (4) reversely twisted with a copper belt; the flowing-out end of the current of the silicon control rectifier (1) is connected with a coil (7) positively twisted with a copper belt; the coil (7) positively twisted with a copper belt and the coil (4) reversely twisted with a copper belt are connected in series and are commonly twisted on a transmission circuit (6). The deicing mechanism is conveniently operated, is beneficial to being popularized and utilized, is longer in deicing distance on the transmission circuit, can not generate power loss to the transmission circuit for a whole year, is conveniently used and can be broadly applied to deicing on the transmission circuit.

Description

Transmission line electric pulse method deicing mechanism

Technical field

The utility model relates to a kind of removing ice of power transmission line mechanism, particularly a kind of transmission line electric pulse method deicing mechanism.

Background technology

Existing transmission line is in non-icing season or do not have under the weather condition of wind and snow, can both satisfy the requirement of safety transmission of electricity, but when meeting with strong snowfall, sleet weather, can on transmission line, form and hang frost, icing and icicle, even form thicker ice cover, strengthen the own wt of transmission line on the surface of transmission line, cause broken string or shaft tower to fracture, interrupt transmission of electricity, make troubles, also bring about great losses to country to people's lives.At the beginning of 2008, high wind snow, sleet disaster that China south meets with, its economic loss reaches and exceeds 100 billion, therefore, under ice and snow, sleet weather condition, in time to transmission line defrost, deicing, prevent that its surface from freezing, and just seems particularly important.At present, solve or prevent that ice trouble from having two kinds of technological approaches from the angle of transmission line: the one, prevent to freeze; The 2nd, adopt an effective measure and carry out deicing.Obviously, preventing to freeze is a kind ofly initiatively to prevent the ice trouble measure, and deicing is a kind of passive anti-ice trouble measure.Take the initiative and prevent the ice trouble technology, i.e. design has the transmission line of icing protection, technology in this respect mainly contains following several: 1, development has hydrophobic coating, be coated in the transmission line surface, but the technical barrier that this technology exists the low and hydrophobic performance instability of the coating intensity of coating and transmission line etc. thoroughly to solve as yet also has big gap in the engineering practical application; 2, adopt the transmission line of special construction, lead is not regular circle, but has certain wedge angle at outermost one or more strands of aluminium single lines, be in contact with it the little and icing difficulty of face at sharp corner owing to water, but be difficult to play anti-icing effect for strong snowfall, strong sleet, also do not obtain practical application; 3, outside transmission line around one or more strands of low Curie temperature alloys, when temperature is low, alloy material has higher magnetic property, the magnetic eddy current loss that induction by current the produced heating transmission line that flows through by transmission line freezes preventing, but it is still higher to prepare the Curie point that hangs down the Curie temperature alloy at present, reaches 20 ℃ Celsius, far above freezing temperature, to produce a large amount of energy losses like this, low simultaneously Curie temperature cost of alloy is higher, has also limited this The Application of Technology.Passive deicing technology comprises that machinery impacts the deicing technology and electrical equipment heats two kinds of deicing technology: machinery impacts the deicing technology and might cause the transmission line mechanical damage, reduce the transmission line life-span, generally should avoid as far as possible adopting; One of electrical equipment deicing technology is to adopt steel core and the transmission line of aluminium stranded conductor with the crosslinked polyetylene insulated special construction that separates of one deck, when carrying out the deicing operation, by switch control the transmission line operating current is all flow through by steel core, because steel core resistance is big, electric energy loss on the unit length is big, thereby plays the effect of heating deicing; Two of electrical equipment deicing technology is under the condition that has a power failure, utilize generator movably to provide to exchange or DC power supply heats the deicing operation to a certain section of the transmission line that frozen, but because the restriction of transmission line geographical conditions, it is very difficult carrying heavy power supply, so also limited this The Application of Technology.

Electro-Impulse De-icing method (EIDI) is a kind of ten minutes mature technique that is applied in the aircraft deicing, its operation principle as shown in Figure 1, this method is by applying trigger impulse for thyristor (1), make high-voltage capacitor (2) deicing by copper coil (4) discharge excitation electric pulse, high-voltage capacitor (2) is by copper coil (4) discharge under the control of thyristor (1) triggering signal, produce quick alternating magnetic field, inducing eddy current near on the pole plate (5) of copper coil (4), pole plate (5) be in some way with aluminium sheet that is linked to each other by the deicing target or secondary coil, under the acting in conjunction of eddy current and coil magnetic field, produce an amplitude and can reach several kN, duration be several ms repulsion, make the after-contraction of target slight expansion and icing pulverized come off.For avoiding high-voltage capacitor (2) reverse charging, a clamp diode (3) in its other parallel connection.At present, on transmission line, use Electro-Impulse De-icing method (EIDI) deicing, also be in the exploratory stage, the U.S. and Russia have carried out many tests in this respect, but be the deicing principle of application drawing 1, high-voltage capacitor (2) is by copper coil (4) discharge, copper coil (4) is installed in to be waited to remove on the pillar of icing lead, pole plate (5) is adjacent with copper coil (4), install concentratedly and waiting to remove on a bit of on the icing lead, its weak point is: because the mechanical damping of transmission line is very big, this Electro-Impulse De-icing method is applied in the mechanism on the transmission line, only can remove very short-range powerline ice-covering, if further improve the voltage of high-voltage capacitor (2), though the deicing length on the transmission line slightly increases, can cause the thermal agitation of transmission line simultaneously, the deicing effect is bad.

Summary of the invention

The purpose of this utility model is to provide a kind of can not only remove the icing of long span transmission line, effectively overcome the restriction of lead mechanical damping and the thermal agitation problem of solution transmission line, and capacitance voltage demand, reduction deicing energy consumption, active deicing and the transmission line electric pulse method easy to utilize that can reduce impulse power electrical source are simultaneously removed electrical mechanisms.

For reaching above purpose, the technical scheme that the utility model adopted is: this transmission line electric pulse method deicing mechanism, by thyristor, high-voltage capacitor, catching diode constitutes, high-voltage capacitor is connected with thyristor with the flow direction end of catching diode after-current in parallel, the inflow end that it is characterized in that the electric current after high-voltage capacitor and the catching diode parallel connection is connected with the electric current outflow end that oppositely twines strap coil, the electric current outflow end of thyristor is connected with the inflow end that forward twines the strap coil electric current, forward twines strap coil and oppositely twines the strap coil series connection, is wound on the transmission line jointly.The utility model is also implemented by following measure: forward and reverse winding strap coil divides inside and outside layer closely to be wound in the outside of transmission line, when high-voltage capacitor discharges, electric current twines strap coil and oppositely twines strap coil by forward successively through thyristor, the phase repulsive interaction that both produce will be removed the icing on the transmission line, and overcome the restriction for the treatment of the deicing power transmission line mechanical damping, can reduce simultaneously the capacity requirement of pulse power supply, reduce the deicing energy consumption, realize effective deicing of long distance transmission line; The thickness of described forward and reverse winding strap coil is the 0.3-0.6 millimeter, and width is the 20-40 millimeter, owing to be very thin one deck on transmission line, so can not produce excessive heavy burden to transmission line; Described transmission line is mainly overhead ground wire, divide inside and outside layer closely to be wound on the transmission line forward and reverse winding strap coil, the starting point of forward and reverse winding strap coil and overhead ground wire together are fixed on the top of shaft tower, to prevent that transmission line is produced long-term power loss; Described high-voltage capacitor is the polypropylene screen power capacitor of 110kv/600 μ F/700kvar, play clock, particular capacity can be according to the concrete condition for the treatment of the deicing area (former years average transmit power circuit ice covering thickness, shaft tower span etc.) change slightly, require high-voltage capacitor to meet GB/T19749-2005 relevant regulations; Described high-voltage capacitor uses the circuit industrial-frequency alternating current that it is charged, and need not independent power supply power supply, and it is convenient therefore to use than other de-icing methods; The selection of described thyristor should match with the capacity requirement of high-voltage capacitor, and for example: when high-voltage capacitor was 110kv/600Uf/700kvar, thyristor was 2500A/400～2600.When needs carry out deicing, after the high-voltage capacitor charging is finished, only need thyristor is manually applied triggering signal, can make the deicing of high-voltage capacitor discharge generation pulse current, also can design a cover detection system, when the needs deicing, apply triggering signal automatically, realize the deicing automation.

The beneficial effects of the utility model are: compare with present removing ice of power transmission line technology, are convenient to operation, be beneficial to and apply, and simple in structure; Compare with the application of present Electro-Impulse De-icing method on transmission line, effectively deicing, and also the distance of the deicing on transmission line is longer, also can not produce long-term power loss to transmission line, and easy to use.

Description of drawings

The structural principle schematic diagram that Fig. 1 uses aboard for the Electro-Impulse De-icing method.

Fig. 2 is the utility model structural principle schematic diagram.

Embodiment

Make the utility model with reference to accompanying drawing 2.This transmission line electric pulse method deicing mechanism, constitute by thyristor 1, high-voltage capacitor 2, catching diode 3, high-voltage capacitor 2 is connected with thyristor 1 with the flow direction end of catching diode 3 after-currents in parallel, the inflow end that it is characterized in that the electric current after high-voltage capacitor 2 and catching diode 3 parallel connections is connected with the electric current outflow end that oppositely twines strap coil 4, the electric current outflow end of thyristor 1 twines strap coil 7 with forward and is connected, forward twines strap coil 7 and oppositely twines strap coil 4 series connection, is wound in jointly on the transmission line 6.7,4 fens inside and outside layer of outsides that closely are wound in transmission line 6 of forward and reverse winding strap coil; The thickness of described forward and reverse winding strap coil 7,4 is the 0.3-0.6 millimeter, and width is the 20-40 millimeter; Described transmission line 6 is mainly overhead ground wire, 7,4 fens inside and outside layers of forward and reverse winding strap coil closely are wound on the transmission line 6, the starting point of forward and reverse winding strap coil 7,4 and overhead ground wire together are fixed on the top of shaft tower, to prevent that transmission line is produced long-term power loss; Described high-voltage capacitor 2 is the polypropylene screen power capacitor of 110kv/600 μ F/700kvar, play clock, particular capacity can be changed slightly according to the concrete condition for the treatment of the deicing area (former years average transmit power circuit ice covering thickness, shaft tower span etc.), requires high-voltage capacitor 2 to meet GB/T19749-2005 relevant regulations; Described high-voltage capacitor 2 uses the circuit industrial-frequency alternating current that it is charged, and need not independent power supply power supply, and it is convenient therefore to use than other de-icing methods; The selection of described thyristor 1 should match with the capacity requirement of high-voltage capacitor 2, and for example: when high-voltage capacitor 2 was 110kv/600Uf/700kvar, thyristor 1 was 2500A/400～2600.

Claims (2)

1, a kind of transmission line electric pulse method deicing mechanism, by thyristor (1), high-voltage capacitor (2), catching diode (3) constitutes, high-voltage capacitor (2) is connected with thyristor (1) with the flow direction end of catching diode (3) after-current in parallel, the inflow end that it is characterized in that the electric current after high-voltage capacitor (2) and catching diode (3) parallel connection is connected with the electric current outflow end that oppositely twines strap coil (4), the electric current outflow end of thyristor (1) twines strap coil (7) with forward and is connected, forward twines strap coil (7) and oppositely twines strap coil (4) series connection, is wound in jointly on the transmission line (6).

2, transmission line electric pulse method deicing mechanism according to claim 1 is characterized in that described forward and reverse winding strap coil (7,4) divides inside and outside layer closely to be wound in the outside of transmission line (6); The thickness of described forward and reverse winding strap coil (7,4) is the 0.3-0.6 millimeter, and width is the 20-40 millimeter; Described high-voltage capacitor (2) is the polypropylene screen power capacitor of 110kv/600 μ F/700kvar; Described thyristor (1) is 2500A/400～2600.

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