The parallel active filter (PAF) is the modern solution for harmonic current
mitigation and reactive power compensation of nonlinear loads. This thesis is
dedicated to detailed analysis, design, control, and implementation of a PAF for a 3-
phase 3-wire rectifier load. Specifically, the current regulator and switching ripple
filter (SRF) are thoroughly investigated. A novel discrete time hysteresis current
regulator with multi-rate current sampling and flexible PWM output, DHCR3, is
proposed. DHCR3 exhibits a high bandwidth while limiting the maximum switching
frequency for thermal stability and its implementation is simple. In addition to the
development of DHCR3, in the thesis state of the art current regulation methods are
considered and thoroughly compared with DHCR3. Since the current regulator type
determines the SRF topology choice, various SRF topologies are considered and a
thorough design study is conducted and SRF topology selection and parameter
determination methods are presented via numerical examples. Through a PAF
designed for a 10kW diode/thyristor rectifier load, the superior performance of
DHCR3 is verified through simulations and experiments and via comparison to other
current regulators. The sufficient switching ripple attenuation of the SRF structures
for the designed PAF system and the overall performance of the designed and built
PAF system are demonstrated via detailed computer simulations and laboratory
experiments. This thesis aids the PAF current regulator and SRF selection, design,
and implementation.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12608438/index.pdf |
| Date | 01 June 2007 |
| Creators | Ozkaya, Hasan |
| Contributors | Hava, Ahmet Masum |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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