DOI:10.1007/s40565-017-0316-x |
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Interaction analysis between induction motor loads and STATCOM in weak grid using induction machine model |
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Net amount: 967 |
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Author:
Ding WANG1, Xiaoming YUAN1
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Author Affiliation:
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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Foundation: |
National Basic Research Program of China (973 Program) (No.2012CB215100), Major Program of National Natural Science Foundation of China (No. 51190104) and National Natural Science Fund for Excellent Young Scholars (No. 51322704) |
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Abstract: |
Static synchronous compensators (STATCOM) can be used as a reactive power compensation for induction motor (IM) loads due to its effective control and good compensation. Terminal voltage control (TVC) in a STATCOM has a great influence on voltage dynamics which is a significant concern in a system with many IM loads. This paper investigates the interaction between IM loads and TVC in a STATCOM under weak grid conditions from the viewpoint of active and reactive power flow. A corresponding induction machine model is proposed, based on which the interaction mechanism between IM loads and TVC in a STATCOM can be intuitively understood. It is shown that the negative damping component provided by TVC in a STATCOM can lead to system oscillation instability. Grid strength and the inertia constant of the
induction machine affect the extent of such interaction. Time-domain simulation results of IM loads connected to an infinite system through a long transmission line, with STATCOM compensation implemented in MATLAB/Simulink, validate the correctness of the analyses. |
Keywords: |
Induction machine, Small signal stability,
Static synchronous compensator (STATCOM), Terminal
voltage control, Weak grid |
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Online Time:2018/01/23 |
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