Derivation and application of a new transmission loss formula for power system economic dispatch

Wei Tzer Huang, Kai Chao Yao, Ming Ku Chen, Feng Ying Wang, Cang Hui Zhu, Yung Ruei Chang, Yih Der Lee, Yuan Hsiang Ho

研究成果: Article

3 引文 斯高帕斯(Scopus)

摘要

The expression and calculation of transmission loss (TL) play key roles for solving the power system economic dispatch (ED) problem. ED including TL must compute the total TL and incremental transmission loss (ITL) by executing power flow equations. However, solving the power flow equations is time-consuming and may result in divergence by the iteration procedure. This approach is unsuitable for real-time ED in practical power systems. To avoid solving nonlinear power flow equations, most power companies continue to adopt the TL formula in ED. Traditional loss formulas are composed of network parameters and in terms of the generator's real power outputs. These formulas are derived by several assumptions, but these basic assumptions sacrifice accuracy. In this study, a new expression for the loss formula is proposed to improve the shortcomings of traditional loss formulas. The coefficients in the new loss formula can be obtained by recording the power losses according to varying real and reactive power outputs without any assumptions. The simultaneous equations of the second-order expansion of the Taylor series are then established. Finally, the corresponding coefficients can be calculated by solving the simultaneous equations. These new coefficients can be used in optimal real and reactive power dispatch problems. The proposed approach is tested by IEEE 14-bus and 30-bus systems, and the results are compared with those obtained from the traditional B coefficient method and the load flow method. The numerical results show that the proposed new loss formula for ED can hold high accuracy for different loading conditions and is very suitable for real-time applications.

原文English
文章編號en11020417
期刊Energies
11
發行號2
DOIs
出版狀態Published - 2018 二月

    指紋

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

引用此

Huang, W. T., Yao, K. C., Chen, M. K., Wang, F. Y., Zhu, C. H., Chang, Y. R., Lee, Y. D., & Ho, Y. H. (2018). Derivation and application of a new transmission loss formula for power system economic dispatch. Energies, 11(2), [en11020417]. https://doi.org/10.3390/en11020417