Voltage balance and control in a multi-level unified power flow controller

Soto, D.; Green, Tim

doi:10.1109/61.956763

Cited by 32 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This restricts the range of voltage control in back-to-back configurations (magnitude of converter voltages cannot be set to be too different) [22]- [24]. Back-to-back connection of nested-cell converters does not compromise the balance of the capacitor voltages.…”

Section: Output Voltage Controlmentioning

confidence: 99%

“…Voltage levels need not be removed and therefore the THD is good. The method is suitable for back-to-back configurations such as that of the UPFC [24].…”

Section: Output Voltage Controlmentioning

confidence: 99%

“…In the case of two or more converters connected back-to-back and with balanced overall power flow, the power flow at each node can be balanced. This can be achieved by properly choosing the control angles of the converters [24], [28]. DC voltage imbalance due to transient conditions or pre-existing ac-side harmonics can be overcome by making small adjustments to the control angles [29].…”

Section: Transfer Of Active Power and DC Voltage Imbalancementioning

confidence: 99%

See 2 more Smart Citations

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

Soto

Green

2002

IEEE Trans. Ind. Electron.

Self Cite

245

106

View full text Add to dashboard Cite

Section: Output Voltage Controlmentioning

confidence: 99%

“…Voltage levels need not be removed and therefore the THD is good. The method is suitable for back-to-back configurations such as that of the UPFC [24].…”

Section: Output Voltage Controlmentioning

confidence: 99%

Section: Transfer Of Active Power and DC Voltage Imbalancementioning

confidence: 99%

See 1 more Smart Citation

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

Soto

Green

2002

IEEE Trans. Ind. Electron.

Self Cite

245

106

View full text Add to dashboard Cite

“…One voltage source inverter is connected in series with the line through a set of series injection transformers, while the other is connected in shunt with the line through a set of shunt transformers. The dc terminals of the two inverters are connected together and their common dc voltage is supported by a capacitor bank [16] . Detailed description of the USSC is given in section 3.…”

Section: Introductionmentioning

confidence: 99%

Development of the Unified Series-Shunt Compensator for Power Quality Mitigation

Hannan¹,

Mohamed²,

Hussain³

et al. 2009

American J. of Applied Sciences

View full text Add to dashboard Cite

This study describes the derivation of an analytical model and simulation for the unified series-shunt compensator (USSC) for investigating power quality in power distribution system. The USSC simulation comprises of two 12-pulse inverters which were connected in series and in shunt with the system. A generalized sinusoidal pulse width modulation (SPWM) switching technique was developed in the proposed controller for fast control action of the USSC. Simulations were carried out using the PSCAD/EMTDC electromagnetic transient programs to examine the performance of the USSC model. Simulation results from the proposed model demonstrated the performance of the USSC and its effectiveness for voltage sag compensation, flicker reduction, voltage unbalance mitigation, power flow control and harmonics elimination.

show abstract

“…There is also a need to provide a balanced neutral point for three-level inverters using the neutral-point clamped topology and, by extension, a need for balancing in higher level inverters based on the multipoint clamped inverter ( [1]- [4] and the survey paper [5]). Although not a focus of this paper, the control techniques described could have applications in multilevel inverters.…”

mentioning

confidence: 99%

$H^infty$Control of the Neutral Point in Four-Wire Three-Phase DC–AC Converters

Zhong

Liang

Feng

et al. 2006

IEEE Trans. Ind. Electron.

Self Cite

View full text Add to dashboard Cite

Abstract-Inverters used as the interface for a distributed generator in a three-phase four-wire system sometimes operate with a large neutral current because of unbalanced loads and singlephase (possibly nonlinear) loads. Voltage balance within the dc-link of the inverter is important for proper operation of the inverter, and the neutral current is a significant disturbance to this. It is preferable to use fast acting control rather than dissipative balancing or large-valued capacitors. This paper develops a linear model of an actively balanced split dc-link and applies H ∞ control design to provide high-bandwidth robust control. The approach is developed for a conventional two-level inverter, but it remains valid (without change) for a three-level neutral-point clamped inverter. The controller achieves very small deviations of the neutral point (better than 0.5 in 800 V) from the midpoint of the dc source despite the large neutral current (32 A RMS ). The controller design is described and verified first in a PSCAD simulation and second in experimental testing of a 30-kW 415-V (line) inverter.Index Terms-DC-AC power converter, dc-link balancing, fourwire three-phase power system, H ∞ control, multilevel inverter, neutral line.

show abstract

Voltage balance and control in a multi-level unified power flow controller

Cited by 32 publications

References 12 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

Development of the Unified Series-Shunt Compensator for Power Quality Mitigation

$H^infty$Control of the Neutral Point in Four-Wire Three-Phase DC–AC Converters

Contact Info

Product

Resources

About