DC modulation controller parameters tuning based on improved multi-signal Prony algorithm

作者：Su, Hongsheng^*; Zhu, Zongkong

来源：Journal of Vibroengineering, 2015, 17(6): 3299-3312.

• inter-area low frequency oscillation
• DC modulation
• Prony algorithm
• identification
• pole placement
• parameters tuning

To aim at the puzzle of DC modulation controller parameters tuning in large-scale AC/DC interconnected power systems, in this paper a multi-signal Prony algorithm is proposed which can simultaneously extracts oscillation modes from multiple signals compared with traditional Prony analysis method. In the algorithm, current setting value increment at rectifier side serves as system input, and AC liaison transmission line active power increment acts as the resulting output under consideration of systems initialization state. Through the improved multi-signal Prony identification on the output time-domain response data under specified input, an equivalent linear model with order reduced is obtained. Based on the identified results, the adjustments are then implemented on the controller parameters using the pole placement method. Through theoretical analysis and IEEE four generators system tests, the simulation results show that to add the DC modulation controller with parameters tuned by the improved Prony algorithm can significantly increase the oscillation damping of AC/DC interconnected systems, and improve the systems operation stability.

• 出版日期2015-9
• 单位兰州交通大学