Understanding of tuning techniques of converter controllers for VSC-HVDC
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Journal Title
Journal ISSN
Volume Title
A4 Artikkeli konferenssijulkaisussa
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Date
2008
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
Series
Proceedings of the Nordic Workshop on Power and Industrial Electronics (NORPIE/2008)
Abstract
A mathematical model of a voltage source converter is presented in the synchronous reference frame for investigating VSC-HVDC for transferring wind power through a long distance. This model is used to analyze voltage and current control loops for the VSC and study their dynamics. Vector control is used for decoupled control of active and reactive power and the transfer functions are derived for the control loops. In investigating the operating conditions for HVDC systems, the tuning of controllers is one of the critical stages of the design of control loops. Three tuning techniques are discussed in the paper and analytical expressions are derived for calculating the parameters of the current and voltage controllers. The tuning criteria are discussed and simulations are used to test the performance of such tuning techniques.Description
Keywords
voltage source converter, VSC-HVDC, vector control, PI controller tuning, modulus optimum, symmetric optimum
