Single-Phase Power Generation Using Three-Phase Self-Excited Synchronous Reluctance Generator
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Bhim Singh
Abstract
This paper presents the single-phase power generation using a three-phase synchronous reluctance generator (SyRG) for a standalone diesel generator (DG) set based standalone supply system. A static compensator (STATCOM) is used for voltage control, harmonics reduction and load balancing on SyRG. The proposed system consists of a SyRG, a variable frequency drive of an induction motor used as a prototype of diesel engine (DE), a STATCOM and single-phase loads. The proposed system feeds single-phase loads in rural areas and telecom towers. The synchronous reference frame theory (SRFT)–based control algorithm is used for the control of STATCOM used for voltage control and load balancing of SyRG.
Appendix A
| Synchronous reluctance generator | Three phase, 230 V, 3.7 kW, Star connected,1,500 rpm, 50 Hz, Xd=22.51 Ω, Xq=5.47 Ω,Rs=0.188 Ω |
| STATCOM | Rf=5 Ω, Cf=5.4 μF, Lf=3.5 mH, Cdc=1650 μFVdc=400 V |
| PI controllers | kpv=0.2, kpi=0.05, kpdc=0.07, kidc=0.08 |
Appendix B
Design of DC link capacitor
The design value of the DC link capacitor (Cdc) is selected on the basis of instantaneous energy to be supplied by VSC during transients. The design equation is expressed as,
where, I is the rms phase current of STATCOM, a is the overloading factor, Vdc is the reference dc voltage and Vdcmin is the minimum voltage level of dc bus, V is the phase voltage, and t is the time required for recovery of DC bus voltage.
Considering the minimum voltage level of the dc bus, Vdcmin= 395 V, I =10 A, Vdc=400 V, V=132.79 V, a=1.2 and t=750 ms, the calculated value of Cdc is 1,793 µF and it is selected as 1,650 µF.
Design of interfacing inductors
The designed value of interfacing inductors is decided by peak to peak current ripple (Ipp), DC link voltage (Vdc) and switching frequency (fs) of VSC,
where m is the modulation index. Considering m=1, a=1.2, Ipp = 1.5 A, Vdc = 400 V and fs = 10 kHz, the value of Lf is obtained as 3.2 mH and a value of 3.5 mH is used in this work.
Design of ripple filter
The values of Rf and Cf are selected such that the impedance offered by the filter is small to high-frequency ripples and it is high for line frequency. The impedance offered by RC filter at any frequency f can be given as,
Selecting Rf=5.0 Ω and Cf=5.4 μF the impedance of the filter is 7.7 Ω at a ripple frequency of 5 kHz and it is 589.48 Ω at line frequency of 50 Hz.
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©2014 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- Research Articles
- A Comparative Study of Mathematical Modeling of Photovoltaic Array
- A New Advanced Topology of Stacked Multicell Inverter
- Augmented State Approach in Quasi-Sliding-Mode Controlled PEBB-Based Power Converters
- Evaluation of Gas Insulated Disconnector Switch for Bus Charging and Bus Transfer Currents
- Grid Stabilization with Decentralized Controllable Loads using Fuzzy Control and Droop Characteristics
- Novel Scheme to Improve Power Factor of Slip Energy Recovery Drive by Selective Harmonic Elimination
- Single-Phase Power Generation Using Three-Phase Self-Excited Synchronous Reluctance Generator
- Voltage Balancing Scheme in MMC – A New Approach
- Modelling and Analysis of a Three-Phase to Five-Phase Transformer
- Novel Cell Flying Capacitor Converter Topology with Significant Reduction in Number of Components
Artikel in diesem Heft
- Frontmatter
- Research Articles
- A Comparative Study of Mathematical Modeling of Photovoltaic Array
- A New Advanced Topology of Stacked Multicell Inverter
- Augmented State Approach in Quasi-Sliding-Mode Controlled PEBB-Based Power Converters
- Evaluation of Gas Insulated Disconnector Switch for Bus Charging and Bus Transfer Currents
- Grid Stabilization with Decentralized Controllable Loads using Fuzzy Control and Droop Characteristics
- Novel Scheme to Improve Power Factor of Slip Energy Recovery Drive by Selective Harmonic Elimination
- Single-Phase Power Generation Using Three-Phase Self-Excited Synchronous Reluctance Generator
- Voltage Balancing Scheme in MMC – A New Approach
- Modelling and Analysis of a Three-Phase to Five-Phase Transformer
- Novel Cell Flying Capacitor Converter Topology with Significant Reduction in Number of Components
