Device to remove ice and snow from overhead wires |
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IPC classes for russian patent Device to remove ice and snow from overhead wires (RU 2520581):
 Device for cables protection from snow sticking, icing and large wave actions / 2519284
Application in the field of electrical engineering. The device contains a shaped flexible fully open or fully closed shell with a slot inside, wherein there is a flexible strong shell-bearing plate, a cable is placed inside the shell, at that it is clamped by clamps at several points along the whole its length and these clamps are interconnected in each set by rigid and strong ties. Whereat the clamps are interconnected by rigid and strong ties similar or different in length with similar or different gaps in between. At that both clamps and shell are made of mom-conducting material.
 Method and apparatus for protecting object from undesirable precipitation / 2518003
Invention relates to safety systems and can be used to protect different objects, for example power lines, building cranes etc. The method of protecting an object from undesirable precipitation involves generating vibrations of the object using a generator with a radiator designed to vibrate the object and separate undesirable precipitation from the object. The generator with a radiator used is a device which is configured to blow at least one charge and using the blow energy to vibrate the object without its breakdown. The invention describes different versions of the device according to the disclosed method using charges in solid, liquid and gaseous fuel with different principles for blowing thereof and use of energy of the blown charges.
 Device to remove icing deposits from wires / 2510114
Device comprises twisted cylindrical springs (2) installed on a wire (1) with a gap with aerodynamic elements (3) and weights arranged asymmetrically to the wire, ends of springs are screwed into circular permanent magnets (4), facing each other by identical poles, aerodynamic elements are made in the form of light plates of various dimensions, installed in the middle part of springs and axial holes wound on them, and asymmetric weights are bolted connections from bolts (6) and nuts (7), installed in holes (8) in the peripheral part of the plates.
 Intergrated apparatus for compensation of reactive power and melting ice cover (version) / 2505903
Apparatus has a three-phase bridge converter on fully controlled semiconductor rectifiers, which are shunted by anti-parallel connected diodes, a capacitor bank at the direct current side, a first three-pole switch and two series-connected three-phase chokes, one of which is connected in parallel to a second three-pole switch, at the alternating current side. According to the first version, the capacitor bank in reactive power compensation mode is connected by contacts of a third three-pole switch, which are open in ice melting mode, to emitter (collector) leads of rectifiers of the converter which in that mode are connected through a fourth three-pole switch to wires of the overhead power line for controlled melting of ice with alternating current. According to the second version, the capacitor bank in reactive power compensation mode is connected by contacts of the third and fourth three-pole switches, which are open in ice melting mode, to emitter and collector leads of rectifiers of the converter which in that mode are connected through fifth and sixth three-pole switches to wires of two overhead power lines for simultaneous controlled melting of ice thereon with alternating current.
 Integrated apparatus for melting ice and compensation of reactive power / 2505899
Integrated apparatus has two three-phase bridge converters on fully controlled semiconductor rectifiers, which are shunted by anti-parallel connected diodes, a capacitor bank at the direct current side of the converters, a first three-pole switch and two series-connected three-phase chokes, one of which is connected in parallel to a second three-pole switch - at the alternating current side. When melting ice, the first converter operates in a controlled rectifier mode and the second converter operates in self-contained voltage inverter mode, the output of said inverter being connected through a third three-pole switch to wires of the overhead power line which are closed at the opposite end, for simultaneous melting of ice thereon with low-frequency alternating current, where the inductive component of the resistance of the wires almost has no effect on the effective melting current value.
 Apparatus for compensation of reactive power and melting ice cover / 2505898
Apparatus has bidirectional high-voltage thyristor valves (1, 2, 3) connected in series to reactive elements (chokes or capacitors) (4, 5, 6). Switching from the reactive power compensation mode to the ice cover melting mode is carried out with two switches (7, 8). To this end, points of connection of the reactive elements (4, 5, 6) and thyristor valves (1, 2, 3) are connected to a three-phase mains supply A, B, C; the free terminals of said valves (1, 2, 3) are connected through contacts of the first switch (7) on a delta circuit to free terminals of the reactive elements (4, 5, 6), and through contacts of the second switch (8) to wires of the overhead line for melting ice cover.
Method for controlled melting of ice on overhead power lines with alternating current / 2505897
Invention can be used at high-voltage substations which require melting ice on wires of overhead power lines. Controlled melting of ice on overhead power lines is carried out with low-frequency current generated by a three-phase self-contained voltage inverter, and the effective melting current value is set and maintained at the required level by varying supply voltage of the inverter. Melting is carried out simultaneously on three wires of the overhead power line, which are connected to output terminals of the three-phase voltage inverter and shorted at the opposite end of the line. The line performs the function of a three-phase load of the inverter with Y phase connection.
 Device for removal of ice coating from wires of overhead transmission lines / 2504880
Device for removal of ice coating (1) from wires (2) contains an element (3) for pulsed shaking up of wires (3); it is actuated by weight of coating on it; it is in-built into mechanical circuit of wire suspension to insulator (4) that consists of the hook (5) is inserted freely by threaded part (6) into through hole (7) in support (8) and fixed by a screw nut (9). The element for pulsed shaking up of wires is made as a spherical buckling membrane in a hole (10) between nut and support and faced to the support by its concave side.
 Device for removal of coating from wires of overhead transmission lines / 2504879
Device for removal of ice coating (1) from wires (2) contains a unit for pulsed shaking up of wires inserted into mechanical circuit of wire suspension that consists of suspension insulator string (3) fixed by a hook (4) to horizontal cross arm (5) of anchor support. Unit for pulsed shaking up of wires is made as cavity (6) in cross arm with two permanent magnets (7) and (8) placed in it; one of magnets is screwed onto threaded end (9) of the hook while the other magnet is fixed rigidly in cavity and its position can be regulated by screw (12). Gap between magnets (7) and (8) under weight of coating ensures pulsed shaking up of the wire and removal of ice coating respectively.
 Device for removal of ice coating from wires of overhead transmission lines / 2504878
Device for removal of snow slush and ice coating (1) from wires (2) includes an element (3) for pulsed shaking up of wires which is activated by weight of coating; it is in-built in mechanical circuit of wire suspension to support (4) by means of pin insulator (5) forced on to arched end of the pin (6). Rectangular window (7) with grooves (8) at both sides is cut in the support; element (3) is made as a flexible and resilient rectangular plate being part of a hollow cylinder; it represents non-linear relay element with two stable conditions and transition from one condition to another by blasting at critical value of environmental load. The pin is fixed (6) at the plate by screws (11) and connected by wire rope section (12) inserted freely through hole and equipped with suspended weight (15) at the end.
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FIELD: power engineering. SUBSTANCE: proposed device comprises power electronic switch (1), integral local circuit reflectometer (2), current HF pulse generator (3), identical galvanically-isolated generators of high-power currents pulses (4.1-4.n), quantity n of the latter corresponding to the quantity of controlled overhead lines connected with power electronic switch. Besides, integral local circuit comprises controller (5) connected with reflectometer (2), computer-aided dispatcher workstation with computer (6) and light panel (7). EFFECT: higher efficiency of protection. 2 dwg
The invention relates to power engineering and can be used in the operation of contact networks and transmission lines under tension in normal mode or in a de-energized condition, for solving the problem of removal from the wires ice formations. Known maloletoarticles device type FOOT-6 to clear ice from the wires of the contact network (Drugov NI Maloletoarticles device type FOOT-6 (to clear ice from the contact wire). OI, CNIITEI IPU. J.-D. transp. Series electrification and energy management. 4, 1983. - p.12 - 18)containing a moving device for the mechanical removal of ice from the contact wire. The disadvantage of this device is the low productivity and the possibility of damage and deformation of the wire during the process of removing ice. Damaged wires can cause a stop of the movement of trains, the deformation of the wires will be accompanied by further accelerated wear. The same disadvantages are inherent in the drums with pneumaturia to remove ice from the wires contact the network / Fedorov V.F. Use drums with pneumaturia on the upholstery of ice from the wires of the contact network. (IL N e 1089-5123, Dnepropetrovsk, dcti, 1982. - 2 S.). The closest claimed is a device that implements the method of removing the snow-l the stock cover with the wires of the transmission lines in patent No. 2404497, IPC H02G 7/16 published 20.11.2010. The device is a galvanically isolated current source connected in wire split phase power lines through the secondary winding of the pulse transformer, which form a current pulse with an amplitude sufficient to obtain such a quantity of heat in the wires of the split phase, which is necessary for warming up the snow-ice cover and reset it with wires. However, this device does not provide timely warning of an impending emergency and automated removal of snow and ice cover with wire power lines. The technical result of the utility model are: - improve the protection of power lines from ice formations at the expense of timely warning of impending emergency situations; - exclusion of the human factor in an emergency situation by automating the removal of snow and ice formations from the wires of the transmission lines; This technical result is achieved in that the device for removing snow and ice cover with wire transmission lines, including managed galvanically isolated generator powerful current pulses, is connected via a pulse transformer wires corresponding split phases of the power lines, according to the claimed invention contains a substation containing local network reflectometer, generator RF pulses, managed galvanically isolated generators powerful current pulses, the total number of which corresponds to the number of controlled power lines connected to the switch power electronics, connecting their outputs in the corresponding split phase power lines, and the controller associated with the OTDR, the automated workplace of the Manager in the computer and the light display. The essence of the technical solution is illustrated in the drawing, where - figure 1 shows a functional diagram of a device for automatic removal of snow and ice covering from the wires of the transmission lines (on the example of two PTL); - figure 2 - diagram of the generator of powerful impulses of current. A device for removing snow and ice cover with wire transmission lines contains merged into a single LAN switch power electronics 1, the reflectometer 2, the generator of the RF current pulses 3, identical galvanically isolated generators powerful current pulses 4(4.1-4.n), the number of which is "n" corresponds to the number of controlled power lines. In addition, a single local network includes a controller 5, workstation dispatcher, the light display 7. Each of the identical galvanically isolated generators powerful current pulses 4(4.1-4.n) through respective pulse transformers T1, T2, T3 separately connected through the switch of power electronics 1 wire split phases of the respective transmission lines. The device also includes a power supply unit 8, which includes three constant current source. One of them (+Q4) connected in parallel to the generators of powerful current pulses 4(4.1-4.n); the second constant current source (Q2) is connected to the generator RF current pulses 3; to the third constant current source (+36) connected in parallel to the switch power electronics 1, the reflectometer 2, the generator RF current pulse 3, a controller 5, the dispatcher workstation in the computer 6 and the light display 7. The device operates as follows. Pulse reflectometer 2 operates in a normal mode clock, serial in time probing all controlled transmission lines in order to identify them ice formations. The principle of the reflectometer is to supply the pulse signal in the monitored transmission line, and determining the total time spent on its distribution in the forward and reverse direction after reflection from the end of the line. Because the ice is s education represent inhomogeneous dielectric, that reduces the speed of signal propagation, the results of the comparison of the measured traces with reference parameters glaze the clutch and its location along the controlled transmission line. Upon detection of ice formations on any of the controlled transmission line, the controller 5 generates and transmits on LAN command to switch on the generator RF current pulse 3 to feed him a high-frequency voltage through the switch of power electronics 1 in this line split phase for pre-heating and the formation of waterlogged layer between the wire and the icy clutch. After completion of the preliminary heating wire split phase, automatically upon command from the controller 5, turns on the corresponding generator of a powerful current pulses (4.1-4.n), which passed a powerful impetus through the switch of power electronics 1 enters the controlled transmission line. As a result of exposure to this line of the split phase of a strong current pulse, is formed thermodynamic stroke, which is combined with the preheated layer between the wire and the icy clutch resets ice formations with power lines. Workstation Manager 6 b provides spiropoulou work station with display operational information on the light display 7. After removal of the ice formations with power lines automated device enters normal operation mode continuous monitoring of all power lines. Thus, the claimed device increases the efficiency of protection of power lines from ice formations at the expense of timely notification of potential emergency situations and automate the removal of snow and ice formations with wire transmission line. Increase the reliability of message transmission to the control center about the status of the transmission lines and the exclusion of the human factor in an emergency situation provides an uninterrupted supply of electricity to consumers. A device for removing snow and ice cover with wire transmission lines, including managed galvanically isolated generator powerful current pulses, is connected via a pulse transformer wires corresponding split phase power lines, characterized in that the device comprises a substation containing local network reflectometer, generator RF pulses, managed galvanically isolated generators powerful current pulses, the total number of which corresponds to the number of controlled power lines connected to the switch power electronics, providing the connection with the corresponding split phase power lines, and the controller associated with the OTDR, the automated workplace of the Manager to the computer, the light display and the power supply unit.
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