Search Results - "Adam, Grain P."

A Unified Rule-Based Small-Signal Modelling Technique for Two-Switch, Non-Isolated DC–DC Converters in CCM by Masike, Lebogang, Gitau, Michael Njoroge, Adam, Grain P.

“…The inherent non-linear behavior of switch-mode power supplies complicates the task of computing their linear models, which are essential for a model-oriented…”
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Unified Approach for Synthesis and Analysis of Non-Isolated DC-DC Converters by Gitau, Michael Njoroge, Adam, Grain P., Masike, Lebogang, Mbukani, Mwana Wa Kalaga

“…Transformational techniques unifying synthesis of two-state DC-DC converters and analytical synthesis techniques allowing generation of all possible converters…”
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Inertia Emulation Control Strategy for VSC-HVDC Transmission Systems by Jiebei Zhu, Booth, Campbell D., Adam, Grain P., Roscoe, Andrew J., Bright, Chris G.

“…There is concern that the levels of inertia in power systems may decrease in the future, due to increased levels of energy being provided from renewable…”
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Analysis and Control of Offshore Wind Farms Connected With Diode Rectifier-Based HVDC System by Yu, Lujie, Li, Rui, Xu, Lie, Adam, Grain P.

“…This paper analyzes the control and operation of offshore wind farms connected with diode rectifier based HVDC (DR-HVDC) system. A small-signal state-space…”
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Half- and Full-Bridge Modular Multilevel Converter Models for Simulations of Full-Scale HVDC Links and Multiterminal DC Grids by Adam, Grain P., Williams, Barry W.

“…This paper presents an improved electromagnetic transient (EMT) simulation model for the half- and full-bridge modular multilevel converters (MMCs) that can be…”
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A Novel Converter Station Structure for Improving Multiterminal HVDC System Resiliency Against AC and DC Faults by Wang, Shuren, Ahmed, Khaled H., Adam, Grain P., Massoud, Ahmed M., Williams, Barry W.

“…In an effort to minimize the power disruption between a dc grid and ac grids that host power converters during ac and dc network faults, this paper proposes a…”
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Enhanced Modular Multilevel Converter for HVdc Applications: Assessments of Dynamic and Transient Responses to AC and DC Faults by Vozikis, Dimitrios, Adam, Grain P., Rault, Pierre, Despouys, Olivier, Holliday, Derrick

“…This article describes the operating principles and theoretical relationships that underpin the modeling and control system of the enhanced modular multilevel…”
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DC Fault Management Strategy for Continuous Operation of HVDC Grids Based on Customized Hybrid MMC by Psaras, Vasileios, Vozikis, Dimitrios, Adam, Grain P., Burt, Graeme

“…Successful deployment of high-voltage direct current (HVdc) grids necessitates effective dc fault handling strategies, which can minimize the severe…”
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Analysis and Assessment of Modular Multilevel Converter Internal Control Schemes by Wang, Shuren, Adam, Grain P., Massoud, Ahmed M., Holliday, Derrick, Williams, Barry W.

“…Adoption of distributed submodule (SM) capacitors in a modular multilevel converter (MMC) necessitates complex controllers to ensure the stability of its…”
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Enhanced Modular Multilevel Converter With Reduced Number of Cells and Harmonic Content by Vozikis, Dimitrios, Adam, Grain P., Rault, Pierre, Despouys, Olivier, Holliday, Derrick, Finney, Stephen J.

“…This paper presents an alternative implementation of a modular multilevel converter (MMC) that generates a large number of voltage levels per phase with…”
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A DC chopper‐based fast active power output reduction scheme for DFIG wind turbine generators by Zhu, Jiebei, Deng, Zhaoshun, Yu, Lujie, Li, Suxuan, Qu, Chunhui, Qiu, Wei, Adam, Grain P., Booth, Campbell

“…Increasing penetration level of renewable energy results in unprecedented operational challenges of AC grids due to generation uncertainty and reduced inertia…”
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Coordinated direct current matching control strategy for multi-terminal DC transmission systems with integrated wind farms by Zhu, Jiebei, Booth, Campbell D., Adam, Grain P., Roscoe, Andrew J.

“…•A new DCMC strategy aims to match the cumulative output of the grid side VSCs (GVSC) via a central control with the total transmitted DC current.•This is…”
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Electrical interconnectors: Market opportunities, regulatory issues, technology considerations and implications for the GB energy sector by MacIver, Callum, Bell, Keith R.W., Adam, Grain P., Xu, Lie

“…The linking of different jurisdictions or markets via electrical interconnection is a long established means of offering enhanced security of supply to the…”
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Analytical efficiency evaluation of two and three level VSC-HVDC transmission links by Kalcon, Giddani, Adam, Grain P., Anaya-Lara, Olimpo, Burt, Graeme, Lo, K.L.

“…► Analytical equations derived to evaluate efficiency of two and three-level VSC-HVDC. ► Losses comparison between two and three level VSC-HVDC is carried out…”
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Multi-task control for VSC–HVDC power and frequency control by Giddani, O.A., Abbas, Abdelaziz Y.M., Adam, Grain P., Anaya-Lara, Olimpo, Lo, K.L.

“…•Novel Multi-task control system for VSC-HVDC system to achieve power management between two ac systems, ac voltage control at point of common coupling and…”
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Analysis and Design of a Modular Multilevel Converter With Trapezoidal Modulation for Medium and High Voltage DC-DC Transformers by Gowaid, I. A., Adam, Grain P., Ahmed, Shehab, Holliday, Derrick, Williams, Barry W.

“…Conventional dual-active bridge topologies provide galvanic isolation and soft-switching over a reasonable operating range without dedicated resonant circuits…”
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Small-Signal Stability Analysis of Multi-Terminal VSC-Based DC Transmission Systems by Kalcon, G. O., Adam, G. P., Anaya-Lara, O., Lo, S., Uhlen, K.

“…A model suitable for small-signal stability analysis and control design of multi-terminal dc networks is presented. A generic test network that combines…”
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Operation Analysis of Thyristor-Based Front-to-Front Active-Forced-Commutated Bridge DC Transformer in LCC and VSC Hybrid HVDC Networks by Peng Li, Adam, Grain P., Finney, Stephen J., Holliday, Derrick

“…The active-forced-commutated (AFC) bridge employs a symmetrical thyristor-bridge with auxiliary self-commutated full-bridge chain-link circuit to assist its…”
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Capacitor Balance Issues of the Diode-Clamped Multilevel Inverter Operated in a Quasi Two-State Mode by Adam, G.P., Finney, S.J., Massoud, A.M., Williams, B.W.

“…A new operational mode for diode-clamped multilevel inverters termed quasi two-level operation is proposed. Such operation aims to avoid the imbalance problem…”
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Quasi two-level PWM operation of a nine-arm modular multilevel converter for six-phase medium-voltage motor drives by Diab, Mohamed S., Adam, Grain P., Williams, B. W., Massoud, Ahmed M., Ahmed, Shehab

“…This paper proposes a hybrid converter for medium-voltage six-phase machine drive systems that mixes the operation of a traditional two-level voltage-source…”
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