EPE  Vol.5 No.4 B , July 2013
The Mechanism of Voltage Instability Analysis Considering Load Characteristic

Load characteristics are the main factor to affect voltage stability. In addition, load modeling reflecting the actual load characteristics has been a well—known difficult problem and unsolved so far, It is mainly due to the fact that the load composition, amount and characteristics are always changing. This paper introduces the slip into the equivalent impedance load model to analyze load characteristic, the varying slip is employed to indicate time-varying load characteristic precisely, and considering the dissimilar load behaviors, discusses node voltage, power during the changes of load characteristic, obtains voltage inflexion and power inflexion, and then analyzes the mechanism of power system voltage instability based on static voltage stability region. An example indicates the feasibility of the method.

Cite this paper: J. Duan and J. Huang, "The Mechanism of Voltage Instability Analysis Considering Load Characteristic," Energy and Power Engineering, Vol. 5 No. 4, 2013, pp. 1497-1502. doi: 10.4236/epe.2013.54B283.

[1]   P. W. Sauer, B. C. Lesieutre and M. A. Pai, “Maximum Load-ability and Voltage Stability in Power Systems,” Electrical Power and Energy Systems, Vol. 15, 1993, pp. 145-154. doi:10.1016/0142-0615(93)90029-M

[2]   X. B. Wang and Z. X. Han, “PV Cueves Analysis Considering the Static Characteristic of Induction Motor,” Chinese Journal of Automation of Electric Power Systems, Vol. 28, 2004, pp. 32-36.

[3]   J. Ma, R. M. He and Y. J. Zhou. “Research on Generalization Capability of Load Model,” Chinese Journal of Proceedings of the CSEE, Vol. 26, 2006, pp. 29-35.

[4]   L. M. Hajagos and B. Danai. “Laboratory Measurements and Models of Moderm Loads and Their Effect on Voltage Stability,” Studies IEEE Trans on Power System, Vol. 13, 1998, pp. 584-592. doi:10.1109/59.667386

[5]   P. F. Zhang, C. L. Luo and Y. J. Meng. “Impact of Dynamic Electric Load Model Proportion on Power System Stability,” Chinese Journal of Relay, Vol. 34, 2006, pp. 24-48.

[6]   J. D. Duan and Z. Z. Guo. “A New Method for on-Line Determination of the Capability Curves of Voltage Stability,” Chinese Journal of Proceedings of the CSEE, Vol. 26, 2006, pp. 113-118.