Advanced static compensation using a multilevel GTO thyristor inverter

“…Proposed uses for these converters have included static var compensation [5]- [12], back-to-back high-voltage intertie [13]- [15], and ASD's [15]- [20].…”

Section: B Multilevel Invertersmentioning

confidence: 99%

“…Normally, these angles are chosen so as to cancel the predominant lower frequency harmonics [6], [12]. For the 11-level case in Fig.…”

Section: A General Structure and Operationmentioning

confidence: 99%

“…Equation (12) for the multilevel inverter under fundamental frequency switching control has an additional factor that (11) for the two-level PWM inverter does not have. However, a comparison of the conducting losses for the two inverters is largely dependent on the specific devices used in each because the saturation voltage and diode forward voltage are device dependent.…”

Section: Efficiencymentioning

confidence: 99%

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Multilevel converters for large electric drives

Tolbert

Peng

Habetler

1999

IEEE Trans. on Ind. Applicat.

1,152

106

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Abstract-This paper presents transformerless multilevel converters as an application for high-power and/or high-voltage electric motor drives. Multilevel converters: 1) can generate nearsinusoidal voltages with only fundamental frequency switching; 2) have almost no electromagnetic interference or common-mode voltage; and 3) are suitable for large voltampere-rated motor drives and high voltages. The cascade inverter is a natural fit for large automotive all-electric drives because it uses several levels of dc voltage sources, which would be available from batteries or fuel cells. The back-to-back diode-clamped converter is ideal where a source of ac voltage is available, such as in a hybrid electric vehicle. Simulation and experimental results show the superiority of these two converters over two-level pulsewidthmodulation-based drives.Index Terms-Cascade inverter, common-mode voltage, diodeclamped inverter, electric vehicle, motor drive, multilevel converter, multilevel inverter.

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“…The performance of each technique has been investigated based upon reduction in THD. Many investigators [4,10,13] have proposed carrier based multilevel sine triangle PWM schemes for control of a DCMLI used in a motor drive and in a static VAR compensator. Multilevel converters are rapidly emerging as viable alternatives for high power drives.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Carrier Overlapping PWM Strategies for Five Level Diode Clamped Inverter

Shanthi¹,

Natarajan²

2011

ijeei

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Keywords: dSPACE, DCMLI, PWM, COPWM, CFD. IntroductionMultilevel inverter has drawn tremendous interest in high power applications because it has many advantages: it can realize high voltage and high power output through the use of semiconductor switches without use of transformer and without dynamic voltage balance circuits. When the number of output levels increases, harmonics of the output voltage and current as well as Electro Magnetic Interference (EMI) decrease. Behera et al [1] described the harmonic analysis of the stepped output of the three level inverter based on number of triangular carriers and a sinusoidal modulating signal. The use of multilevel approach is believed to be a promising alternative in very high power conversion processing [2,8]. Chaturvedi et al [3] presented simulation studies on different control techniques for three and five level DCMLI. The performance of each technique has been investigated based upon reduction in THD. Many investigators [4,10,13] have proposed carrier based multilevel sine triangle PWM schemes for control of a DCMLI used in a motor drive and in a static VAR compensator. Multilevel converters are rapidly emerging as viable alternatives for high power drives. A generalized circuit topology of multilevel voltage source inverter is proposed in [5]. Aquila et al [6] presented a digital implementation of DCMLI employing a fast microprocessor and logic circuits. Multilevel voltage source inverters have recently become very popular in applications using renewable energy sources such as fuel cell, photovoltaic cell and biomass etc [7]. The idea of control degrees of freedom combination and the validity of the PWM strategies are demonstrated by simulation and experimentation of three and five level inverters by Hongyan Wang et al [9]. This is based on a direct extension of three level inverter to higher level. Newton et al [11] discussed the control requirements for three and five level inverters.

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Advanced static compensation using a multilevel GTO thyristor inverter

Cited by 116 publications

References 6 publications

A comparison of high-power converter topologies for the implementation of FACTS controllers

A comparison of high-power converter topologies for the implementation of FACTS controllers

Multilevel converters for large electric drives

Comparative Study on Carrier Overlapping PWM Strategies for Five Level Diode Clamped Inverter

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