AC fault ride through of modular multilevel converter VSC-HVDC transmission systems

Olowookere, Olusegun; Skarvelis‐Kazakos, Spyros; Habtay, Yehdego; Woodhead, Steve

doi:10.1109/upec.2015.7339823

Cited by 11 publications

(6 citation statements)

References 37 publications

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“…The circulating current control dynamics in the d-q reference frame rotating at 2ω 0 frequency is given by the following equation. Figure 9 presents the arm circulating current control based on Equations (21) and (22). Since the submodule (SM) capacitor charges and discharges based on its selection and current direction, capacitor voltage drifts from one submodule to another submodule.…”

Section: Low Level Controlmentioning

confidence: 99%

SCIG Based Wind Energy Integrated Multiterminal MMC-HVDC Transmission Network

Hossain

Abido

2020

Sustainability

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Modular multilevel converter (MMC) based HVDC system for renewable energy integration has attracted the researcher’s interest nowadays. This paper proposes a control strategy for MMC based multiterminal HVDC system for grid integration of squirrel cage induction generator (SCIG) based wind energy systems. Unlike the average model, this work models the MMC using the aggregate model and develops multiterminal HVDC transmission network in MATLAB/Simulink. It further develops the MMC multiterminal HVDC transmission network in real time digital simulator (RTDS). Instead of simplified current source, the proposed network considers the complete dynamics of SCIG based wind source from generation to integration. It employs field-oriented control for optimum wind energy tracking and forms isolated AC grids using feed forward controller. The proposed MMC controller performance has been tested under severe balanced and unbalanced disturbances. The results from aggregate model based MMC network in MATLAB/Simulink and those of the experimental MMC network in RTDS are in full agreement. The results confirm optimum wind energy tracking, fulfill grid code requirements, and improve low voltage ride through capability.

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Section: Low Level Controlmentioning

confidence: 99%

SCIG Based Wind Energy Integrated Multiterminal MMC-HVDC Transmission Network

Hossain

Abido

2020

Sustainability

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“…It has a serious impact on the networks, due to the large transient voltage involved [97]. If AC fault ride through is not capable with the converters, DC network will not be balanced from the active power by the AC side during the fault condition, it causes a collapse in the network [98].…”

Section: Fundamental Design Constraintsmentioning

confidence: 99%

Modular‐multilevel converter topologies and applications – a review

Priya

Ponnambalam

Muralikumar

2019

IET Power Electronics

118

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Recently developed modular-multilevel converter (M-MC) has a major attention in the industry and research works which is moving into feasible technology for many medium and high-power applications. M-MCs have been improved by existing power conversion technology in several aspects, including efficiency, modular structure, power quality, transformerless operational capability, fault tolerant and redundancy operations having a low expense, standard components utilisation, high availability, excellent quality of output wave forms. However, as several challenges combined with M-MC topologies, include reduced voltage stress, compact size, and substantially lower semiconductor losses. These attributes the lower operating cost for high-power applications such as distribution systems and high-voltage direct current (HVDC) transmission systems. The main contribution of this study is to bring the scrutiny of M-MC applications and different circuit topologies. These M-MC configurations consist of converter structures with sub-module converters and M-MC family members. In such a way, the M-MC applications are generalised and it results the size and cost halved, reduced conduction and switching losses and increases system reliabilities. Moreover, in each application of M-MC, drawbacks, and advantages have been discussed in detail. This review presents the latest performance of M-MC with respect to the mentioned research areas and new applications.

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“…The offshore wind farm output power could be reduced by decreasing the modulation index of the converter, which results in a significant reduction of power but a maintained converter-rated current [20]. Any communication failure could destabilize the whole HVDC grids, which in turn has made the dynamic braking resistor (DBR)-based local control more effective to deal with excess energy in the HVDC [18,21,22].…”

Section: Introductionmentioning

confidence: 99%

Active Power Control of PV-Battery Connected MMC-HVDC System for FRT Support

Hossain

Abido

2020

Applied Sciences

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Modular multilevel converter (MMC)-based VSC system has become attractive around the world for renewable energy integration. Instead of a dynamic braking resistor, this work proposes an active power reduction technique for PV systems to support the fault ride through (FRT) of the MMC-HVDC system. In addition, it develops a battery control strategy to improve transient performance during solar radiation and temperature change due to partial shading of the PV panels. Besides, a control technique for the battery to regulate the surplus energy in the HVDC transmission network is developed. Furthermore, the proposed control scheme optimally integrates solar energy using the modified incremental conductance method. A feedforward controller was employed to create a standalone AC grid. The complete system has been implemented in real-time digital simulation (RTDS). The results confirm the efficacy of active power reduction technique to protect the HVDC link voltage and battery control strategy for the improvement of transient performance during the irradiance and temperature changes. Besides, it improves the low voltage ride-through capability during balanced and unbalanced disturbances at the point of common coupling.

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AC fault ride through of modular multilevel converter VSC-HVDC transmission systems

Cited by 11 publications

References 37 publications

SCIG Based Wind Energy Integrated Multiterminal MMC-HVDC Transmission Network

SCIG Based Wind Energy Integrated Multiterminal MMC-HVDC Transmission Network

Modular‐multilevel converter topologies and applications – a review

Active Power Control of PV-Battery Connected MMC-HVDC System for FRT Support

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