Effect of Damper Winding and Stator Slot Skewing Structure on No-Load Voltage Waveform Distortion and Damper Bar Heat in Large Tubular Hydro Generator | Zendy

Zhen-Nan Fan | Zendy; Li Han | Zendy; Yong Liao | Zendy; Li-Dan Xie | Zendy; Kun Wen | Zendy; Jun Wang | Zendy; Xiu-Cheng Dong | Zendy; Bing Yao | Zendy

Open Access

Effect of Damper Winding and Stator Slot Skewing Structure on No-Load Voltage Waveform Distortion and Damper Bar Heat in Large Tubular Hydro Generator

Author(s) -

Zhen-Nan Fan,

Li Han,

Yong Liao,

Li-Dan Xie,

Kun Wen,

Jun Wang,

Xiu-Cheng Dong,

Bing Yao

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2827704

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

We study the influence of the damper bar pitch, the stator slot skewing degree, and the damper bar number per pole on the no-load voltage waveform harmonic distortion factor (HDF) and the damper winding heat of a tubular hydro generator. We implemented 288 different design schemes using a 36-MW fractional-slot tubular hydro generator. The following influence factors were investigated: continuous variation, variation range, variation step, and higher-order harmonics of no-load voltage. Thus, the relation among these structure parameters and the HDF, the losses, and the highest temperature of the damper bars is revealed. In addition, the calculated models and results are validated directly by test data, and measures are proposed for their improvement. The present research not only corrected the errors in the related papers we published before, but also provides guidelines for optimizing the no-load voltage waveform and decreases the damper bar losses and heat, as well as a more comprehensive, accurate, and effective reference for improving tubular hydro generator design and manufacture.

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