Effects of unbalanced mains voltage conditions on three-phase hybrid rectifiers employing third harmonic injection

Makoschitz, Markus; Hartmanny, M.; Ertl, H.

doi:10.1109/sedst.2015.7315245

Cited by 5 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• The influence of grid negative sequence in multipulse DFE topologies can be considered as negligible; less than 0.5% of the average rectified voltage for 𝑉 𝑛𝑒𝑡(−) =0.02 p.u. according to [50]. Therefore, in DFE type converters, 𝑉 𝑛𝑒𝑡(−) can be considered as zero in the method for calculating the optimal vessel connection voltage, simplifying the overall process.…”

Section: B Definition Of Optimal Vessel Connection Voltage In S2sp Co...mentioning

confidence: 99%

Optimal Connection Voltage of Soft Open Point and Shore-to-Ship Power Converters for Enhanced Capacitive Reactive Power Operation

Olea-Oregi,

Sanchez-Ruiz,

Eguía-López

et al. 2024

IEEE Access

View full text Add to dashboard Cite

Soft Open Point and Shore-to-Ship Power applications permit to deploy smart grid infrastructure into distribution and port networks. Both are based on power electronics converters that require an optimal integration to maximize capacitive reactive power limits at minimum impact over costs and efficiency. To meet this objective, the paper defines a methodology to calculate the optimal connection voltage of power converters used in these applications. The proposed methodology is based on three novelties related to capacitive reactive power limits definition. Firstly, all affecting variables from positive and negative sequences are jointly considered completing partial approaches identified in previous works. Secondly, the impact of negative sequence affecting multiple converter terminals is considered, adding accuracy to reactive power limit calculation of Soft Open Point converters. Thirdly, the influence of two main constraints affecting modulation limits in real converters is described, quantifying its impact over maximum capacitive reactive power limits. These constraints are related to semiconductor characteristics and to digital implementation; usually not considered for dimensioning purposes at application level, but which can have a key impact on capacitive operation. At this point, the authors provide explicit details of industrially available converter designs to support calculations and evaluate its impact over the final solution. Considering the above, the proposed methodology is implemented on a real 20MW 6.6kV medium voltage converter design and results are quantified and compared from a reactive power capacity, efficiency and cost perspective.INDEX TERMS Modulation limits, reactive power capability, shore-to-ship power, soft open point.

show abstract

Section: B Definition Of Optimal Vessel Connection Voltage In S2sp Co...mentioning

confidence: 99%

Optimal Connection Voltage of Soft Open Point and Shore-to-Ship Power Converters for Enhanced Capacitive Reactive Power Operation

Olea-Oregi,

Sanchez-Ruiz,

Eguía-López

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Consequently, the hybrid rectifier meets the stringent requirements for high power quality in efficient electrolytic hydrogen production processes. Hence, the hybrid rectifier can more precisely respond to the dynamic changes in the electrical grid and the hydrogen production load, facilitating a more efficient and stable electrolytic hydrogen production process [21][22][23][24][25][26]. For instance, Bintz has designed a high-current, low-voltage hybrid rectifier topology for use in electrolytic hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Research on Hybrid Rectifier for High Power Electrolytic Hydrogen Production Based on Modular Multilevel Converter

Huang,

Tan,

Meng

2024

Energies

View full text Add to dashboard Cite

Aiming at the problem that silicon-controlled rectifiers (SCR) and pulse width modulation (PWM) rectifiers cannot balance high power levels, high hydrogen production efficiency, and high grid connected quality in the current research on rectifier power supplies for electrolytic hydrogen production, a new hybrid rectifier topology based on a modular multilevel converter (MMC) is proposed. The hybrid topology integrates a silicon-controlled rectifier (SCR) with an auxiliary power converter, wherein the SCR is designated as the primary power source for electrolytic hydrogen production. The auxiliary converter employs a cascaded modular multilevel converter (MMC) and an input-series-output-parallel (ISOP) phase-shifted full-bridge (PSFB) arrangement. This configuration allows the auxiliary converter to effectively mitigate AC-side harmonics and minimize DC-side ripple, concurrently transmitting a small amount of power. The effectiveness of the hybrid rectifier in achieving low ripple and harmonic distortion outputs was substantiated through hardware-in-the-loop experiments. Notably, the hybrid topology is characterized by its enhanced electric-to-hydrogen conversion efficiency, elevated power density, cost efficiency, and improved grid compatibility.

show abstract

Symmetric-component decoupled control of grid-connected inverters for voltage unbalance correction and harmonic compensation

Zhang

Roes

Hendrix

et al. 2020

International Journal of Electrical Power & Energy Systems

View full text Add to dashboard Cite

Effects of unbalanced mains voltage conditions on three-phase hybrid rectifiers employing third harmonic injection

Cited by 5 publications

References 22 publications

Optimal Connection Voltage of Soft Open Point and Shore-to-Ship Power Converters for Enhanced Capacitive Reactive Power Operation

Optimal Connection Voltage of Soft Open Point and Shore-to-Ship Power Converters for Enhanced Capacitive Reactive Power Operation

Research on Hybrid Rectifier for High Power Electrolytic Hydrogen Production Based on Modular Multilevel Converter

Symmetric-component decoupled control of grid-connected inverters for voltage unbalance correction and harmonic compensation

Contact Info

Product

Resources

About