Influence Analysis of Power Grid Harmonics on Synchronous Hydro Generators


Vol. 18, No. 5, pp. 1577-1584, Sep. 2018
10.6113/JPE.2018.18.5.1577


PDF     Full-Text

 Abstract

The content of harmonic current increases with an increase in the number of power electronic devices in power grid. When a generator is directly connected to the power grid through a step-up transformer, the influence of the harmonic currents on the generator is inevitable. To study the influences of harmonics on generators, a 24-MW bulb tubular turbine generator is taken as an example in this paper. A 2-D transient electromagnetic field model is established. Through a comparative analysis of the data of experiments and simulations, the correctness of the model is verified. The values of the air gap magnetic density, torque and losses of the generator under various conditions are calculated using the finite element method. Taking the rated condition as a reference, the influence of the harmonic currents on the magnetic flux density is analyzed. It is confirmed that the time harmonic is a key factor affecting the generator performance. At the same time, the effects of harmonic currents on the torque ripple, average torque and eddy current loss of the generator are studied, and the mechanism of the variation of the eddy current loss is also discussed.


 Statistics
Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.



Cite this article

[IEEE Style]

H. Qiu, X. Fan, J. Feng and C. Yang, "Influence Analysis of Power Grid Harmonics on Synchronous Hydro Generators," Journal of Power Electronics, vol. 18, no. 5, pp. 1577-1584, 2018. DOI: 10.6113/JPE.2018.18.5.1577.

[ACM Style]

Hongbo Qiu, Xiaobin Fan, Jianqin Feng, and Cunxiang Yang. 2018. Influence Analysis of Power Grid Harmonics on Synchronous Hydro Generators. Journal of Power Electronics, 18, 5, (2018), 1577-1584. DOI: 10.6113/JPE.2018.18.5.1577.