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| Received:October 08, 2011Revised:April 03, 2012 |
| 基金项目:This work was partly supported by the National Natural Science Foundation of China (Nos. 61202340, 61125301). This paper was partly presented at the 4th International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, Weihai, China, 2011. |
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| Identification and application of nonlinear dynamic load models |
| Jing YANG,Min WU,Yong HE,Yonghua XIONG |
| (School of Information Science and Engineering, Central South University, and Hunan Engineering Laboratory for Advanced Control and Intelligent Automation) |
| Abstract: |
| An alternating least squares approach is developed in this paper to identify the exponential recovery dynamic load model of wide-area power systems. The nonlinear optimization problem is decomposed to two linear least squares problems, and solved in an alternating way. Then, a new algorithm for numerical derivative calculation using discrete Fourier transform is proposed to attenuate the effect of noises in the process of parameter estimation. Based on the estimated dynamic load characteristics, the application on voltage stability is analyzed. Finally, numerical and laboratory examples are conducted to demonstrate the effectiveness of the proposed methods. |
| Key words: Dynamic load models Parameter estimation Alternating least squares approach Numerical derivative technique Voltage stability |
