Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (8): 41-48.doi: 10.3969/j.issn.1000-565X.2015.08.007

• Power & Electrical Engineering • Previous Articles     Next Articles

An Improved Analytical Method of Generator Aggregation Parameters Based on Structural Constraint#br#

  

  1. 1． School of Electric Power，South China University of Technology，Guangzhou 510640，Guangdong，China;
    2． Electric Power Research Institute of Guangdong Power Grid Co. ，Ltd. ，Guangzhou 510080,Guangdong，China
  • Received:2014-09-04 Revised:2015-03-19 Online:2015-08-25 Published:2015-07-01
  • Contact: 朱林(1979-)，男，博士，副教授，主要从事电力系统稳定与控制研究． E-mail:zhul@scut.edu.cn
  • About author:朱林(1979-)，男，博士，副教授，主要从事电力系统稳定与控制研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China(51407079) and the National High-Tech R＆D
    Program of China(863Program)(2012AA050209)

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Abstract: Proposed in this paper is an improved analytical method of generator aggregation parameters． This method
first adds a phase shift transformer to a common bus to eliminate the voltage deviation caused by moving coherent generators，and then directly obtains the parameters of the equivalent generating units based on the coefficient matrices structure preservation characteristic of the generator structure and the fact that the sum of the current phasor on every axis of the synchronous planes is equal． This method overcomes the deficiencies of the traditional methods，which depend on the transfer function fitting in the frequency domain or the time domain simulation and thus rely on the setting of working points and the selection of optimization directions． Therefore，the proposed method is more adaptive for generating unitsand can be applied to the on-line calculation．

Key words: dynamic equivalence, generator aggregation, structural constraint, electric power system stability