Mitigation of harmonics and unbalanced source voltage condition in standalone microgrid: positive sequence component and dynamic phasor based compensator with real-time approach

Rane, Mahendra; Wagh, Sushama

doi:10.1016/j.heliyon.2019.e01178

Cited by 12 publications

(5 citation statements)

References 27 publications

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“…A hierarchical control strategy is proposed for a four-wire MG in [124] for compensation of both NS and zero-sequence quantities. A dynamic phasor-based compensation technique to mitigate harmonics and unbalanced source voltage condition is proposed in [125]. A cost function-based method is proposed in [126] using continuous control set MPC for simultaneously compensating the bus voltage and negative and harmonic current mitigation.…”

Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

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Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for threephase MGs and presents the possible challenges and avenues for future investigations on the topic.

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Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

“…The objective of the unbalance compensation or mitigation depends upon the conditions of the MG and the operating mode (islanded or grid‐connected). Unbalance mitigation in islanded MGs [18, 21, 22, 23, 25, 27–32, …”

Section: Unbalance Mitigation In the Islanded Modementioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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“…In the worst-case scenario of extreme unbalances, such as grid-fault in one phase, the whole system would not work as it is an issue that has to be tackled from the power flow control perspective, which is not the aim of this paper. Nevertheless, the unbalances in a distribution network are not usually of such magnitude as the EN 50160 standard [35] does not allow a positive magnitude deviation greater than a 10%, nor a negative sequence presence greater than 2% of the positive one [1,36].…”

Section: Behaviour Under Unbalanced Grid Conditionsmentioning

confidence: 99%

A simple modulation approach for interfacing three-level Neutral-Point-Clamped converters to the grid

Ventosa‐Cutillas

Montero-Robina

Cuesta

et al. 2020

Energy

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Multilevel converters are nowadays an enabling key in the integration of electric power into the grid as they introduce less distortion and, thus, they are more compliant with the grid standards, among other benefits. A well-known topology is the three-level Neutral-Point-Clamped (NPC) whose control requires to deal with the capacitors voltage unbalance. This paper presents a modulation approach where the injection of a common component in the modulated voltage is studied in order to achieve such voltage balance. An optimization problem that, apart from the voltage balance, aims the lowest number of commutations and can be solved very efficiently with up to five computations of the cost function is formulated. The main advantages of the proposed modulation strategy are its simplicity and its flexibility, since it is also valid for unbalanced grid conditions and, with little added complexity, for low (and even zero) power factor conditions. Simulation results under unbalanced grid conditions are provided in order to show its validity under this scenario. The strategy is evaluated and compared with a space-vector-based approach in an experimental setup, yielding similar total harmonic current distortion (4.4%), a 30% reduction in the number of commutations, and better voltage balance performance for lower power factor conditions.

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“…M. Rane, 2019 [18] in their paper emphasize on the effect of unbalance and harmonics on the operation of standalone MG; this they said could be as a result of reduced power transfer from DER to load and also as an error produced in phase locked loop (PLL) operation. They, therefore, propose a positive sequence component (PSC)-based and dynamic phasor (DP)-based compensation techniques to mitigate the effect of unbalanced source voltage condition (UbSVC).…”

Section: Introductionmentioning

confidence: 99%

Harmonic generation of variable speed drive under complex-voltage unbalance conditions

et al. 2022

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Efficiency in the industrial sector is a priority when seeking to minimize production costs and reduction in losses. Harmonic generation and associated losses need to be treated carefully with broad implementation of variable speed induction motor applications. The effect of these induced losses can add up to a significant loss. This study uses statistical tools alongside synthesized models to deduce and compare outcomes from regulated and unregulated converters in which harmonics may be triggered by switching algorithm of modern switch-mode power supplies and other inductive loads attached to supply bus system. These harmonics accumulate over time due to losses propagating through connected equipment when changes occur on the bus system. In this regard, results obtained from investigating and comparing three original equipment manufacturer variable speed drives that were exposed to voltage unbalance and complex harmonic conditions are presented in this study. A conclusion accomplished from the investigation and comparison suggests that generation of 6-pulse uncontrolled rectifier losses is negligible. Experimental validation confirms that unregulated 6-pulse converter produces on average more harmonics compared to the regulated converter of standard as recommended in guideline to permissible harmonic tolerance.

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Mitigation of harmonics and unbalanced source voltage condition in standalone microgrid: positive sequence component and dynamic phasor based compensator with real-time approach

Cited by 12 publications

References 27 publications

Unbalance mitigation strategies in microgrids

Unbalance mitigation strategies in microgrids

A simple modulation approach for interfacing three-level Neutral-Point-Clamped converters to the grid

Harmonic generation of variable speed drive under complex-voltage unbalance conditions

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