Study on the Influence of the Intervention of Wind Power on Steam Turbine Rotor Life

doi:10.11930/j.issn.1004-9649.201611094

Abstract

Abstract: In order to achieve the safe operation of wind and thermal power, this paper adopts the finite element method to analyze the load change of the thermal power unit, the temperature field and the stress field of the steam turbine rotor before and after wind power intervention. The dangerous position of the rotor is determined as well. Then the Mises Von stress curve of the rotor is plotted, and the total life loss of the steam turbine rotor is calculated based on the rain-flow counting method and the linear fatigue cumulative damage theory.The results show that whether the wind power is involved or not, the maximum value of Mises Von stress is always at the root of IP first stage impeller, and the temperature field also has severe change at the same location as well. When wind power is involved, the numbers of the stress cycle will increase so that, the life loss of the steam turbine rotor increasing from 0.000 653 9% to 0.001 408% and the life loss speed increasing 2.15 times as the original one., The study shows that wind power has significant influence on the rotor life.

Key words: thermal power generation unit, wind power generation unit, thermal stress, rain-flow counting method, low cycle fatigue, rotor life

CLC Number:

WANG Zhanzhou, CAO Lihua, WEI Honggang, YANG Ming. Study on the Influence of the Intervention of Wind Power on Steam Turbine Rotor Life[J]. Electric Power, 2018, 51(4): 101-107.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201611094

https://www.electricpower.com.cn/EN/Y2018/V51/I4/101

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