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LCL-filters offer higher attenuation of harmonics from VSCs than L-filters. However, LCL filters contain a resonant peak which could cause oscillations or instability unless the controller is carefully designed. In this thesis, a control strategy that employs 'active damping' to damp this resonance is explored. A new topology is presented for a discrete-time current controller which combines deadbeat current control with optimal state-feedback pole assignment to produce well-damped, high-bandwidth response, as well as fast transient overcurrent protection. Through numerical analysis the controller is shown to be robust to parameter uncertainty. A brief analysis of a two-converter system suggests that the controller functions well in a multi-converter environment. Simulations and experimental tests verify that fast well-damped transient response and overcurrent protection is possible at low switching frequencies relative to the resonant frequency.
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Digital current control of a voltage source converter with active damping of LCL resonance.
2005
in English
0494022140 9780494022146
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Digital current control of a voltage source converter with active damping of LCL resonance.
2005
in English
0494022140 9780494022146
|
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Libraries near you:
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Book Details
Edition Notes
Thesis (M.A.Sc.)--University of Toronto, 2005.
Electronic version licensed for access by U. of T. users.
Source: Masters Abstracts International, Volume: 44-01, page: 0416.
GERSTEIN MICROTEXT copy on microfiche (2 microfiches).
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