Optimized Calculation of Losses in Large Hydro-Generators Using Statistical Methods

Traxler-Samek, G.; Schwery, A.; Zickermann, R.; Ramírez, Carlos

doi:10.1007/978-1-4020-4535-6_2

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…The presented calculation method makes use of an advanced analytical loss calculation model [15]. This model does not only include the classical losses (stator core iron losses, I 2 R losses, ventilation losses) but also much more detailed losses, like stator end region losses [16].…”

Section: Loss Computation Modelmentioning

confidence: 99%

Cooling Airflow, Losses, and Temperatures in Large Air-Cooled Synchronous Machines

Traxler-Samek

Zickermann

Schwery

2010

IEEE Trans. Ind. Electron.

132

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At steady-state operation, power losses cause a heating of rotating electrical machines. In air-cooled machines, these losses are evacuated by a forced cooling airflow through the active parts. When designing and optimizing such a machine, the design engineer must be able to get a full picture of the power losses, the cooling airflow, and the temperatures inside the active parts (e.g., core laminations, windings) and the periphery (e.g., winding overhangs). The aim of the designer is to fulfill the customer's requirements regarding the guaranteed temperatures. This paper presents a computation method, where the power loss, airflow, and temperature calculations for the world's largest air-cooled hydrogenerators are coupled in an iterative process. The new contribution of this paper is a calculation software developed by the authors. It includes a state-of-the-art loss computation, an automated airflow network, and a set of linked thermal networks. These computations result in a complete overview of the temperature gradients and allow fine tuning of the cooling airflow and, consequently, optimization of ventilation losses.

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Section: Loss Computation Modelmentioning

confidence: 99%

Cooling Airflow, Losses, and Temperatures in Large Air-Cooled Synchronous Machines

Traxler-Samek

Zickermann

Schwery

2010

IEEE Trans. Ind. Electron.

132

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“…In the basic design phase of a hydro generator, the electrical design is optimized regarding the electromagnetic load, the temperature rises, the losses and the manufacturing costs without exceeding tolerable mechanical stresses at runaway speed [1]. The main problem when calculating power losses in hydro generators are deviations between calculated and measured losses.…”

Section: Introductionmentioning

confidence: 99%

Influence of higher harmonics in the end region magnetic field on eddy currents in the stator clamping system of hydro generators

Schmidt

Traxler-Samek

Schwery

2005

IEEE International Conference on Electric Machines and Drives, 2005.

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The reliability of the loss calculation is a very important issue during the electrical design phase of hydro generators. Therefore, the accurate calculation of eddy currents in the stator clamping system is a matter of particular interest with initial design and design optimization. Due to the nonlinear magnetic behaviour of the clamping plate, the eddy current losses in these regions can reach high values and produce local thermal hot-spots. The calculation results obtained from 3D time-harmonic and 3D nonlinear transient finite element analyses of a 450 MVA hydro generator are compared with regard to local and total eddy current losses. Thereby, special attention is given to the influence of higher harmonics in the excitating end region magnetic field.

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8. Die elektrisch erregte Synchronmaschine

Binder

2012

Elektrische Maschinen Und Antriebe

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Optimized Calculation of Losses in Large Hydro-Generators Using Statistical Methods

Cited by 5 publications

References 3 publications

Cooling Airflow, Losses, and Temperatures in Large Air-Cooled Synchronous Machines

Cooling Airflow, Losses, and Temperatures in Large Air-Cooled Synchronous Machines

Influence of higher harmonics in the end region magnetic field on eddy currents in the stator clamping system of hydro generators

8. Die elektrisch erregte Synchronmaschine

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