The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable (6) comprising one or more current-carrying conductors (31)
The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by at least one outer and one inner semiconducting layer (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The stator winding may be produced with full or fractional slot winding, the phases of the winding being Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter. The invention also relates to a hydro-generator plant, a generator included in the plant and a procedure for building such a plant.
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1. A hydrogenerator plant for connection to a high voltage transmission or distribution network comprising: at least one rotating electric machine for high voltage coupled to a turbine via shaft means, said electric machine comprising at least one winding formed of a conductor including a plurality
1. A hydrogenerator plant for connection to a high voltage transmission or distribution network comprising: at least one rotating electric machine for high voltage coupled to a turbine via shaft means, said electric machine comprising at least one winding formed of a conductor including a plurality of insulated conductive elements, and at least one uninsulated conductive element; a covering surrounding the conductor including an inner layer having semiconducting properties, a solid insulating layer surrounding the inner layer and an outer layer having semiconducting properties surrounding the insulating layer, said inner layer being in contact with the uninsulated element such that the inner layer has the same potential as the conductor, and said at least one winding being directly connectable to the transmission or distribution network, the voltages being across a range of transmission or distribution voltages.2. The plant as claimed in claim 1 wherein the at least two semiconducting layers each form essentially an equipotential surface, and wherein at least one of the layers has substantially the same coefficient of thermal expansion as the solid insulation.3. The plant as claimed in claim 1, wherein the generator comprises a magnetic circuit with a magnetic core.4. The plant as claimed in claim 3, wherein the electric machine includes a core comprising laminated sheet of at least one of cast iron, powder-based iron, and rough forge iron.5. The plant as claimed in claim 1 wherein the winding comprises a cable.6. The plant as claimed in claim 5, wherein at least two of said layers have substantially the same coefficient of thermal expansion.7. The plant as claimed in claim 1, wherein the inner semiconducting layer is at substantially the same potential as the conductors.8. The plant as claimed in claim 1, wherein the outer semiconducting layer forms an equipotential surface surrounding the conductors.9. The plant as claimed in claim 8, wherein said outer semiconducting layer is connected to a predefined potential.10. The plant as claimed in claim 9, wherein the predefined potential is earth potential.11. A plant as claimed in claim 9 wherein the coils in the stator are distributed and have a coil span different from the pole pitch.12. The plant as claimed in claim 1, wherein the cable also comprises a metal screen and a sheath.13. The plant as claimed in claim 1 including a stator cooled at earth potential by means of a fluid.14. The plant as claimed in claim 1 wherein the outer semiconducting layer is connected to earth potential.15. The plant as claimed in claim 1, wherein the electric machine includes a rotor inductively connected to the high voltage.16. The plant as claimed in claim 15, wherein the rotor is cylindrical in shape, has salient poles and also has a constant air gap.17. The plant as claimed in claim 16, wherein the electric machine includes a stator having a stator winding formed as at least one of an integral slot winding, and a fractional slot winding.18. The plant as claimed in claim 17, wherein the stator has a pole pitch and the winding is distributed and includes a coil having a coil span different from the pole pitch.19. The plant as claimed in claim 1, wherein the cable has a conductor area of about between 40 and 3000 mm2 and an outer cable diameter of about between 20 and 250 mm.20. The plant as claimed in claim 19, wherein the cable is cooled by gas or liquid inside current-carrying conductors.21. The plant as claimed in claim 1, wherein the electric machine is designed for high voltage and arranged to supply the out-going electric network directly without any intermediate connection of a transformer.22. The plant as claimed in claim 21, wherein at least one electric machine is earthed via an impedance.23. The plant as claimed in claim 21, wherein electric machine is directly earthed.24. The plant as claimed in claim 21, wherein said plant is operative as at least one of a pump and turbine station, the electric machine being arranged to function as at least one of a motor driven directly from the transmission or distribution network and as a generator, generating voltage for the transmission or distribution network.25. The plant as claimed claim 21, wherein the electric machine is arranged to generate power to various voltage levels.26. The plant as claimed in claim 25, wherein at least one electric machine includes a separate auxiliary winding for producing auxiliary power at one of said voltage levels.27. The plant as claimed in claim 1, comprising a plurality of electric machines, each of which lacks an individual step-up transformer, but which, via a system transformer common to the electric machines, is connected to the transmission or distribution network.28. The plant as claimed in claim 1, including a common earth system.29. The plant as claimed in claim 1, wherein the winding of the electric machine is operable for self-regulating field control and lacks auxiliary means for control of the field.30. The plant as claimed in claim 1, wherein the electric machine includes a stator comprising a plurality of stator limitations having openings for receiving the winding, said laminations being assembled into a stack with the openings aligned, and the winding comprises a cable threaded into the openings or the stacking laminations of the stator at the manufacturing facility or at the generation plant site.31. An electric generator for a high voltage included in a hydro-generator plant in which the generator is coupled to a turbine via shaft means, said generator comprising at least one winding including a conductor, a solid insulation covering including an inner layer having semiconducting properties; a solid insulating layer surrounding the inner layer and an outer layer having semiconducting properties surrounding the insulation layer; said conductor formed of a plurality of conductive elements including at least one uninsulated element in contact with the inner layer and a plurality of insulated elements; and wherein each winding is directly connectable to a high voltage transmission or distribution network, and the inner layer forms an equipotential surface about the conductor.32. A hydrogenerator plant including a rotating high voltage electric machine comprising a stator; a rotor and a winding, wherein said winding comprises a cable including a current-carrying conductor and a magnetically permeable, electric field confining cover surrounding the conductor, the cover including an inner layer having semiconducting properties, a solid insulation surrounding the inner layer and an outer layer having semiconducting properties surrounding the solid insulation, said cable forming at least one uninterrupted turn in the corresponding winding of said machine, and wherein the conductor includes a plurality of insulated conductive strands and at least one uninsulated electrically conductive strand in contact with the inner layer, such that said conductor and inner layer are at the same potential.33. The hydrogenerator plant of claim 32, wherein the outer layer has a conductivity sufficient to establish an equipotential surface around the conductor.34. The hydrogenerator plant of claim 32, wherein the cover is formed of a plurality of integrally bonded layers, and wherein said plurality of layers are substantially void free.35. A hydrogenerator plant for direct connection to a high voltage transmission or distribution network comprising: at least one rotating electric machine for high voltage coupled to a turbine via shaft means, said electric machine including at least one winding comprising a conductor and a magnetically permeable, electric field confining insulating covering surrounding the conductor including an inner layer having semiconducting properties, a solid insulation surrounding the inner layer and an outer layer having semiconducting properties surrounding the insulating layer, said conductor including at least one of a plurality of insulated conductive elements, and at least one uninsulated conductive element being in contact with the inner layer such that said conductor and inner layer are at the same potential; and said at least one winding being directly connectable to the transmission or distribution network.
Albright Donald R. (Scotia NY) Sage Henry F. (Schenectady NY) Archibald James B. (Schenectady NY), Air-gap winding stator construction for dynamoelectric machine.
Raschbichler Hans G. (Ottobrunn DEX) Miller Luitpold (Ottobrunn DEX) Wcislo Manfred (Ottobrunn DEX) Breitenbach Otto (Nuremburg DEX), Apparatus for completing a linear motor stator.
Wcislo Manfred (Ottobrunn DEX) Breitenbach Otto (Nuremberg DEX) Schatz Friedrich (Wedemark DEX) Riepling Ulrich (Wedemark DEX), Apparatus for installing a prefabricated winding of a linear motor.
Kimmel Donald S. (Fletcher NC) Mummert Charles R. (Hendersonville both of NC) Eichler Kenneth M. (Murrysville PA) Markus David R. (Monroeville PA), Apparatus protecting a synchronous machine from under excitation.
Khutoretsky Garri M. (Altaiskaya ulitsa ; 20 ; kv. 5 Leningrad SUX) Fridman Vladimir M. (Grazhdansky prospekt ; 13 ; korpus 1 ; kv. 170 Leningrad SUX) Vorontsov Alexandr I. (ulitsa Khazova ; 43 ; kv., Arrangement for supporting stator end windings of an electric machine.
Schaeffer Friedrich K. (Cheshire MA) Brennan Thomas F. (Dalton MA), Bonded transposed transformer winding cable strands having improved short circuit withstand.
Raschbichler Hans G. (Ottobrunn DEX) Miller Luitpold (Ottobrunn DEX) Wcislo Manfred (Ottobrunn DEX) Breitenbach Otto (Nuremberg DEX), Completing a linear motor stator.
Armerding Rainer (Ludwigshafen DEX) Helmling Rupert (St. Leon-Rot DEX) Kpp Waldemar (Mannheim DEX) Wagner Harry (Weinheim DEX) Ehrt Peter (Einhausen DEX) Bser Emil (Mannheim DEX), Conductor bar for electric machines and method of manufacture thereof.
Takaoka Michio (Chiba JPX) Mohtai Tsuneaki (Yachiyo JPX) Yoshida Syotaroh (Tokyo JPX) Watanabe Kazuo (Tokyo JPX), Conductor for an electrical power cable and a method for manufacturing the same.
Nikitin Pavel Z. (ulitsa Stroitelei ; 5 ; korpus 1 ; kv. 2 Moscow SUX) Danilevich Yanush B. (ulitsa Tipanova ; 29 ; kv. 681 Leningrad SUX) Maslennikov Konstantin N. (ulitsa Petukhova ; 138 ; kv. 87 N, Coupling unit of two multilayer cables of high-voltage generator stator winding.
Sandberg Torvald (Lulea SEX) Forsberg Stig (Lulea SEX), Device for phase compensation and excitation of an asynchronous machine operating as a generator.
Lambrecht Dietrich (Rathenaustr. 11 4330 Mlheim ; Ruhr DEX), Device for securing winding bars in slots of electric machines, especially turbo-generators.
Rieber John C. (Louisville KY) Sheaffer Jeffrey D. (Scotia NY) Walthers Russell E. (Saratoga NY), Dynamoelectric machine slot wedges with abrasion resistant layer.
Rieber John C. (Louisville KY) McCoy Jeffrey S. (Jeffersontown KY), Dynamoelectric machines including metal filled glass cloth slot closure wedges, and methods of making the same.
Breitenbach Otto (Nuremburg DEX) Hanisch Ferdinand (Burgwedel DEX) Madry Peter (Barsinghausen DEX), Electric cable for use as phase winding for linear motors.
Spenadel Lawrence (League City TX) Hendewerk Monica L. (Houston TX) Mehta Aspy K. (Humble TX), Electrical devices comprising polymeric insulating or semiconducting members.
Butman ; Jr. Thomas R. (Albany NY) Lynn Alexander L. (Duanesburg NY) Torossian Kevork A. (Schenectady NY), Electrostatic grading layer for the surface of an electrical insulation exposed to high electrical stress.
Rabinowitz Mario (Redwood City CA) Esselman Walter H. (Los Altos CA), Emission controlled current limiter for use in electric power transmission and distribution.
Feather Landis E. (Hermitage PA) Martincic Paul W. (Hermitage Township PA) Holm Richard D. (Penn Hills Township PA) Thompson Richard E. (Muncie IN), High-voltage winding for core-form power transformers.
Mendelsohn Morris A. (Wilkins Township ; Allegheny County PA) Navish ; Jr. Francis W. (East Pittsburgh PA), Impregnated high voltage spacers for use with resin filled hose bracing systems.
Akamatsu Masahiko (Amagasaki JPX), Inductor type synchronous motor driving system for minute control of the position and the rotation angle of the motor.
Takagi ; Toshinori ; Nishiyama ; Tatsuichiro ; Uchida ; Unosuke, Insulating film, sheet, or plate material with metallic coating and method for manufacturing same.
Silver David A. (Livingston NJ) Lukac Rudolf G. (East Brunswick NJ) Rubinstein Solomon (Fanwood NJ), Irradiation cross-linked polymeric insulated electric cable.
Mischler William R. (02 Schenectady NY) General Electric Company (02 Schenectady NY), Laminated motor stator structure with molded composite pole pieces.
Silva Donald M. (West Lafayette IN) Silva LeRoy F. (Lafayette IN) Fehsenfeld ; Sr. Fred M. (Indianapolis IN), Low-noise switching power supply having variable reluctance transformer.
Rosenberry ; Jr. George M. (Hendersonville TN) Mallick John A. (Delanson NY) Richter Eike (Scotia NY), Magnetic slot wedge with low average permeability and high mechanical strength.
Zocholl Stanley E. (Holland PA), Method and apparatus for providing thermal protection for large motors based on accurate calculations of slip dependent.
Schultz ; Goran ; Wiberg ; Karl-Gunnar, Method of joining two cables with an insulation of cross-linked polyethylene or another cross linked linear polymer.
Raschbichler Hans-Georg (Ottobrunn DEX) Breitenbach Otto (Nuremberg DEX) Bll Jrgen (Nuremberg DEX) Uttenreuther Josef (Nuremberg DEX), Method of making linear motor stator.
Elton Richard K. (Altamont NY) Schultz ; Jr. William R. (Schenectady NY), Process for electrodepositing mica on coil or bar connections and resulting products.
Ruffing Charles R. (Edgewood Borough PA) Gause Smith A. (Hampton SC) Botts John C. (LaGrange GA) Smith Harry E. (Varnville SC), Resin impregnated aromatic polyamide covered glass based slot wedge for large dynamoelectric machines.
Keim Thomas A. (Clifton Park NY) Minnich Stephen H. (Schenectady NY), Star connected air gap polyphase armature having limited voltage gradients at phase boundaries.
Nikitin Pavel Z. (Moscow SUX) Nemeni Tibor M. (Moscow SUX) Zolotov Lev A. (Moscow SUX) Bezchastnov Gennady A. (Moscow SUX) Nikolsky Alexandr I. (Moscow SUX) Sharashkin Andrei M. (Moscow SUX) Tjurin A, Stator of generator.
Vinokurov Alexandr A. (ulitsa Polzunova ; 31 ; kv. 314 Novosibirsk SUX) Gorbunov Gennady S. (ulitsa Polzunova ; 35 ; kv. 42 Novosibirsk SUX) Popov Jury S. (ulitsa Bariernaya ; 16 ; kv. 14 Novosibirsk, Super-conductive electrical machine having an improved system for maintaining vacuum in the stator/rotor space.
Estop Pascal (Vitry-sur-Seine FRX) Verhaege Thierry (Saulx les Chartreux FRX) Pham Van Doan (Meyzieu FRX) Lacaze Alain (Essert FRX) Cottevieille Christian (Montreuil FRX), Superconductive coil assembly particularly for a current limiter, and a current limiter including such a coil assembly.
Stone Gregory C. (25 Holloway Road Toronto ; Ontario CAX M9H 1E9) Boggs Steven A. (63 Pears Avenue Toronto ; Ontario CAX M5R 1S9) Braun Jean-Marie (32 Hudson Drive Toronto ; Ontario CAX M4T 2J9), Surge attenuating cable.
Cooper Glenn D. (Orlando FL) Butler ; III John M. (Orlando FL) Morrison Darrell R. (Orlando FL) Senic Charles L. (Winter Park FL) Nilsson Lennart S. (Winter Park FL) Rowe Charles M. (Orlando FL), Turbine generator stator end winding support assembly with decoupling from the core.
Dolan, Shawn E.; Ziehm, Mark W.; Kuhns, Eric C.; Lombardo, Jr., Michael, Electroceramic coating of a wire for use in a bundled power transmission cable.
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