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ANSALDO ENERGIA
HYDROGENERATORS

HYDROGENERATORS

Product catalog summary

Overview of Hydrogenerators: Ansaldo Energia produces three main types of hydrogenerators: generators for river flow, generators for high-head plants, and motor-generators for pumped storage systems. These machines are designed to operate at a wide range of rotational speeds (50-1200 rpm) and are crucial for both new plants and service applications.

Design and Manufacturing: The design of hydrogenerators involves both electrical and mechanical considerations, with a focus on insulation reliability, ventilation, and cooling. Ansaldo Energia's hydrogenerators are self-ventilated and can be cooled using air to water coolers. The stator and rotor are constructed with high-quality materials to ensure durability and performance.

Reliability and Quality Control: Ansaldo Energia emphasizes reliability through advanced design, manufacturing, and quality control techniques. The machinery is built to withstand faults like sudden short circuits without damage. A comprehensive after-sales service and continuous R&D ensure product evolution aligned with customer needs.

Excitation and Braking Systems: Both static and brushless excitation systems are available. The braking and lifting plant facilitates rapid deceleration and maintenance of vertical hydrogenerator units.

Testing and Standards: All generators undergo rigorous testing, including stator core magnetization and insulation resistance tests, in compliance with IEEE and IEC standards. Ansaldo Energia's facilities allow for balancing and overspeed testing of high-speed machines.

Start-up and After-sales Services: Ansaldo Energia provides comprehensive services, including component supply, turnkey plants, and refurbishment. The company offers technical assistance, maintenance, and training to ensure optimal operation of hydrogenerators.

Main Supplies and References: Ansaldo Energia has a history of producing significant hydrogenerator units worldwide, with notable projects in Italy, Iraq, Brazil, Colombia, and Mexico. The company collaborates with other firms for joint projects.

Assembly and Transport: Machinery assembly can occur at production facilities or on-site, depending on transportation limits and customer needs. Laminated rotor rims are typically assembled on-site.

Standards and Coupling: Generators comply with IEC 60034-1 and IEEE C50.12 standards. They can be coupled with Kaplan, Francis, and Pelton turbines, with various coupling arrangements available.

Company Background: Ansaldo Energia has over 150 years of experience in electrical and mechanical engineering, with a global presence in the power generation sector. The company is ISO 9001 certified, covering all aspects of design, manufacture, and servicing.

Catalog excerpts

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:22.00pt "Franklin Gothic Medium", sans-serif; }

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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; } Hydrogenerators Hydrogenerators have an extremely wide range of rota-tional speed depending on individual site condition. Due to this range (usually 50 - 1200 rpm), the construction configuration of the shaft and bearings, diameter and structure of the rotor, have a several possibility....

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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 hydrogenerators are self-ventilated in an open or closed circuit with air to water coolers with indirectly cooled stator and rotor winding. The stator comprises the frame, the stacked stator core and the winding. According to transportation and erection limits, the stator can be divided,...

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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; } In low speed hydrogenerators the rotor comprises the poles, the laminated rotor rim, the welded spider and the shaft. Both through shaft and stub shaft solutions are available. The laminated rotor rim consists of segments assem-bled on site at the plant, thus overcoming any transport problems. Each segment is made of punched steel plate with well- The most frequent configuration of rotor for high speed generators...

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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; } A typical feature of high speed machines is the trape-zoidal pole body, which has inclined longitudinal sides to allow the corresponding coil bar centre-line to be po-sitioned at a right angle to the rotor radius. This configuration, used in case of high mechanical stresses, may be the only option open for designers to solve problems caused by centrifugal forces acting on the rotor winding. The poles are fixed...

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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:22.00pt "Franklin Gothic Medium", sans-serif; } Testing xcitation system Both fully static (standard) and brushless excitation arrangements are available. The fully static excitation system comprises an excitation power transformer, a power converter with controls and protections and a static circuit breaker. The brushless excitation...

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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; } mblv and transport Start up and after sales services Ansaldo Energia can assembly machinery both at its production facilities and on site according to transportation limits and customer requirements. Laminated rotor rim is nearly always assembled on site. Ansaldo Energia can meet all customer requirements in the hydrogenerator field, supplying: ͕ components...

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G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "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:12.00pt "Franklin Gothic Medium", sans-serif; } .font6 { font:27.00pt "Franklin Gothic Medium", sans-serif; } .font7 { font:5.00pt "Georgia", serif; } .font8 { font:28.00pt...

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