Modeling of Supercritical Fossil-Fired Units for Medium- and Long-Term Analysis on Power Grids

doi:10.11930/j.issn.1004-9649.2013.7.11.6

Abstract

Abstract: Many blackout accidents indicate that the medium- and long-term stability is much important for modern large-scale interconnected power grids. The proportion of supercritical(ultra supercritical) units to thermal power units grows very fast and its mathematic model is significant to the medium- and long-term stability analysis. In this paper, the physical equations presenting the dynamic characteristics of supercritical (ultra supercritical) units are derived and a simplified non-linear transfer function model is built. In addition, the model is identified and verified by the testing data of one 1 000-MW ultra supercritical unit. The results show that there are only 12 parameters in the model and the parameters can be easily obtained from the parameter identification procedures. The model and its identified parameters are accurate enough compared with the test data, which aresuitable for the medium- and long-term stability analysis of power grids.

Key words: medium- and long-term stability of power grid, supercritical parameter, thermal power unit, dynamic model

CLC Number:

TM621.3

GAO Lin, CUI Zhan-bing, WANG Wen-jun. Modeling of Supercritical Fossil-Fired Units for Medium- and Long-Term Analysis on Power Grids[J]. Electric Power, 2013, 46(7): 11-17.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.7.11.6

https://www.electricpower.com.cn/EN/Y2013/V46/I7/11

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