Control and derating of a PV inverter for harmonic compensation in a smart distribution system

Todeschini, Grazia

doi:10.1109/pesgm.2017.8274607

Cited by 9 publications

(4 citation statements)

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“…As an example, [15] presents the control of a three-phase stand-alone inverter to reduce the harmonic content in the grid and to mitigate voltage unbalance. In [6], a PV inverter is controlled to provide active filtering as ancillary service when the PV generation is curtailed, while a novel algorithm is incorporated to ensure that the converter operates within its nominal ratings. The deployment of such functionality may be remunerative for a PV developer, provided that a compensation scheme is given, which could compensate for the revenue losses due to the PV power curtailment.…”

Section: Implementation Of Active Filtering Functionmentioning

confidence: 99%

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Battery Energy Storage Systems in the United Kingdom: A Review of Current State-of-the-Art and Future Applications

Mexis

Todeschini

2020

Energies

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The number of battery energy storage systems (BESSs) installed in the United Kingdom and worldwide is growing rapidly due to a variety of factors, including technological improvements, reduced costs and the ability to provide various ancillary services. The aim of this paper is to carry out a comprehensive literature review on this technology, its applications in power systems and to identify potential future developments. At first, the main BESSs projects in the UK are presented and classified. The parameters provided for each project include rated power, battery technology and ancillary services provided, if any. In the next section, the most commonly deployed ancillary services are classified and described. At the same time, the nomenclature found in the literature is explained and harmonised. The second part of the paper focuses on future developments and research gaps: ancillary services that currently are not common but that are likely to be deployed more widely in the future will be described, and more general research topics related to the development of BESSs for power system applications will be outlined.

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Section: Implementation Of Active Filtering Functionmentioning

confidence: 99%

“…Thirdly, these power electronics-based sources deteriorate the power quality of the grid, due to the injection of harmonic components [5,6]. Finally, an increasing concern of system operators is the decrease in system inertia associated to the retirement of fossil-based plants [7].…”

Section: Introductionmentioning

confidence: 99%

Battery Energy Storage Systems in the United Kingdom: A Review of Current State-of-the-Art and Future Applications

Mexis

Todeschini

2020

Energies

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“…With high PV penetrations, these functionalities of smart inverters can help mitigate many of the challenges associated with increasing PV (both utility scale and rooftops) penetration in the smart grid. New smart inverter functionalities such as dynamic load control, dynamic harmonic control, frequency deviation support, output scheduling and future functionalities would be required to help support the smart grid [136][137][138][139]. More responsibilities for the grid would lie on the smart inverters.…”

Section: And Smart Inverter Functionalitiesmentioning

confidence: 99%

Future Challenges and Mitigation Methods for High Photovoltaic Penetration: A Survey

et al. 2018

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Integration of high volume (high penetration) of photovoltaic (PV) generation with power grids consequently leads to some technical challenges that are mainly due to the intermittent nature of solar energy, the volume of data involved in the smart grid architecture, and the impact power electronic-based smart inverters. These challenges include reverse power flow, voltage fluctuations, power quality issues, dynamic stability, big data challenges and others. This paper investigates the existing challenges with the current level of PV penetration and looks into the challenges with high PV penetration in future scenarios such as smart cities, transactive energy, proliferation of plug-in hybrid electric vehicles (PHEVs), possible eclipse events, big data issues and environmental impacts. Within the context of these future scenarios, this paper reviewed the existing solutions and provides insights to new and future solutions that could be explored to ultimately address these issues and improve the smart grid's security, reliability and resiliency.

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“…Finally, the integration of power-electronics based devices threatens to degrade the power quality, since they inject harmonic components in the grid [7], [8]. Among others, the retirement of fossil-based plants becomes an increasing concern for system operators, since it leads to the decrease of the system inertia [9].…”

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confidence: 99%

Design of Ancillary Services for Battery Energy Storage Systems to Mitigate Voltage Unbalance in Power Distribution Networks

Mexis¹

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In light of the increasing penetration of single-phase loads and generation in the power system, voltage unbalance issues are expected to exacerbate. Single-phase connected photovoltaic (PV) panels may cause unequal three-phase power flows, resulting in unbalanced grid currents and voltages. In addition, the random charging behaviour of Plug-in Hybrid Electric Vehicles (PHEVs) equipped with single-phase on-board chargers is expected to further contribute to voltage unbalance rise as the number of these devices grows. If voltage unbalance increases to unacceptable levels, it may have adverse effects on power system operation and on the equipment connected to it. Traditionally, the phase swapping technique has been deployed by distribution system operators for voltage unbalance mitigation, while other mitigating techniques include the deployment of power electronics-based devices. The majority of the devices reported in the literature are based on three-phase configurations, including series and parallel active power filters, unified power quality conditioners (UPQCs), static synchronous compensators (STAT-COMs) and, more recently, three-phase distributed generation (DG) inverters.This research proposes the use of single-phase battery energy storage systems (BESSs) for the provision of phase balancing services, which has been considered only in a few literature works, with most of these research papers focusing on three-phase BESSs. In this thesis, a novel control strategy is proposed for single-phase BESS units to compensate voltage unbalance by injecting both active and reactive power simultaneously. The proposed approach is based on the coordinated operation of three independent single-phase BESS inverters using local voltage and current measurements.Initially, a comprehensive literature review is performed with the following aims: a robust classification of the ancillary services currently offered by BESSs, harmonisation of the notation found in the literature for ancillary services, and identification of potential future applications of BESSs to power grids with large number of Low Carbon Technologies (LCTs). Then, the effectiveness of the proposed voltage unbalance compensation method is validated in the simulation environment, where two realistic models of distribution systems are developed. Next, the impact of increasing PV and EV penetration levels on voltage unbalance for a typical UK distribution system is assessed based on a deterministic approach. The control strategy is validated experimentally by carrying out Hardware-In-The-Loop (HIL) tests. Finally, an equivalent model of the distribution system and BESS inverter is derived, which allows to carry out a preliminary probabilistic study to cater for the uncertainties related to the location and size of the PVs and EVs, and to evaluate the voltage unbalance levels without and with the BESSs controlled to provide voltage unbalance compensation.It is concluded that the proposed BESS control system may effectively reduce the voltage unbalance levels under...

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Control and derating of a PV inverter for harmonic compensation in a smart distribution system

Cited by 9 publications

References 10 publications

Battery Energy Storage Systems in the United Kingdom: A Review of Current State-of-the-Art and Future Applications

Battery Energy Storage Systems in the United Kingdom: A Review of Current State-of-the-Art and Future Applications

Future Challenges and Mitigation Methods for High Photovoltaic Penetration: A Survey

Design of Ancillary Services for Battery Energy Storage Systems to Mitigate Voltage Unbalance in Power Distribution Networks

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