首页|Interaction Quantification of MTDC Systems Connected with Weak AC Grids
Interaction Quantification of MTDC Systems Connected with Weak AC Grids
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The small-signal stability of multi-terminal high voltage direct current(HVDC)systems has become one of the vital issues in modern power systems.Interactions among voltage source converters(VSCs)have a significant impact on the stability of the system.This paper proposes an interaction quantification method based on the self-/en-stabilizing coefficients of the general N-terminal HVDC system with a weak AC network connection.First,we derive the explicit formulae of self-/en-stabilizing coef-ficients for any N-terminal HVDC system,which can quantify the interactions through different paths analytically.The relation between the self-/en-stabilizing coefficients and the poles of the system can be used to evaluate the impact of the interactions on the system stability effectively.Then,we employ the obtained formulae to analyze the parameter sensitivity and explain how a parameter affects the stability of the system through different paths of interactions.Finally,extensive examples are given to demonstrate the effectiveness of the proposed method.
Wanning Zheng、Jiabing Hu、Li Chai、Bing Liu、Zixia Sang
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Engineering Research Center of Metallurgical Automation and Measurement Technology,Wuhan University of Science and Technology,Wuhan 430081,China
State Key Laboratory of Advanced Electromagnetic Engineering and Technology,and School of Electrical and Electronic Engi-neering,Huazhong University of Science and Technology,Wuhan 430074,China
College of Control Science and Engineering,Zhejiang University,Hangzhou 310027,China
State Grid Hubei Economic Research Institute,Wuhan 430077,China
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