TURBOGENERATORS
12Pages

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:27.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:48.30pt "Franklin Gothic Medium", sans-serif; } ' AnsaldoEnergja A Finmeccanica Company

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.40pt "Franklin Gothic Medium", sans-serif; } .font1 { font:7.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:8.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:20.00pt "Franklin Gothic Medium", sans-serif; } .font6 { font:22.00pt "Franklin Gothic Medium", sans-serif; } Turbogenerators Ansaldo Energia...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } Reliability Design features and manufacture Ansaldo Energia air-cooled generators have indirectly cooled stator windings and directly cooled rotor windings. Generators are self-ventilated in a closed circuit with air to water coolers. Special make-up or active-carbon filters can be pro-vided if needed for reasons of air contamination. Direct...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } After curing, the insulation meets all class F require-ments as well as having excellent long-term in-service durability and outstanding mechanical and electrical properties. Conductive varnish and tapes prevent co- The rotor winding can expand uniformly lengthwise to ensure smooth running and minimum sensitivity to rapid load changes. All the insulation materials used in the rotor comply with class F...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:10.00pt "Times New Roman", serif; } Excitation system Testing Standard solution consists of fully static excitation System which comprises an excitation power transformer, a power converter with controls and protections, a static circuit breaker and, for excitation systems connected to generator terminals, a startup excitation...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:20.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:22.00pt "Franklin Gothic Medium", sans-serif; } Hydrogen cooled/Hydrogen and stator water cooled turbogenerators Design features and manufacture The core is cooled by hydrogen gas flowing in radial ducts. In generators with water-cooled stator windings the core is...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } Forces generated during sudden short circuits are re-strained by heavy rings used as the basic support. In smaller units solid outer rings are sufficient for this purpose. On large generators the end windings can easily be checked for tightness during overhauls using a torque wrench with access through the manholes. This guarantees uniform stiffness of the end winding throughout operating life....

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:14.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:16.00pt "Franklin Gothic Medium", sans-serif; } Auxiliary Systems A number of auxiliary Systems are needed to condition and circulate the water and hydrogen used for cooling and keep the shaft seals supplied with oil. | The gas plant conditions and monitors the coolant...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } Excitation system Testing To deliver stable power supply when operating on a network and maintain generator voltage constant during no load operation or station servicing, large generators need a fast-response excitation system capable of adapting the air-gap flux rapidly to load conditions. Static excitation units are particularly suited to...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.40pt "Franklin Gothic Medium", sans-serif; } .font1 { font:8.00pt "Franklin Gothic Medium", sans-serif; } ROGEN COOLED TURBOGENERATORS GENERAL CHARACTERISTICS Generators have indirect cooled stator - windings and direct cooled rotor windings. Hydrogen is used as a coolant fluid. Stator core is direct cooled with hydrogen. Frequency Speed Power Rated Voltage Power Range Hz RPM factor kV MVA ■ Protection degree: ■ Excitation: ■ Hydrogen pressure:...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:7.00pt "Arial", sans-serif; } .font1 { font:4.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:5.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:7.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:8.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font6 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font7 { font:16.00pt "Franklin Gothic Medium",...