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《Journal of Northeast Dianli University》 2011-04
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Utilizing HVDC Modulation to Improve Small Signal Stability

CHEN Hou-he1,XU Shuang2,LI Guo-qing1,JIANG Tao1,DENG Chao2(1.School of Electrical Engineering,Northeast Dianli University,Jilin Jilin 132012;2.Suizhou Power-Supply Co.LTD,Suizhou Hubei 441300)  
In this paper,the HVDC modulation is proposed to improve small-signal stability of hybrid AC/DC systems.Multi-machine model,including HVDC power system,is developed to study small-signal stability.Based on this model,the modal analysis is used to investigate the feasibility of damping inter-area oscillation using HVDC modulation.The parameters for single-input single-output lead-lag compensation of HVDC modulation controller are calculated by root locus.Then,the proposed control strategy is applied to design the HVDC modulation controller.The simulation results shows that utilizing HVDC to improve small-signal stability needs HVDC modulation,applying root locus to design controller is simple and easy to implement.
【Fund】: 国家自然科学基金项目(50977009)
【CateGory Index】: TM712
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