Mitigation of Voltage Unbalace in Rural Low Voltage Networks Using Single-Phase Bess Inverters

Mexis, Ioannis; Todeschini, Grazia; Möller, Friedemann; Meyer, Jörg

doi:10.1049/icp.2021.1998

Cited by 3 publications

(4 citation statements)

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“…For example, it was found that the maximum power exchange between the BESS and the grid is 3 kW and 4 kW for BESS placement at feeder A and C, respectively. These results are in agreement with the ones obtained in [31], where it was shown that the BESS power exchange is reduced when BESSs are placed downstream due to lower load demand at these locations. As a result, a BESS with lower rating may be installed at feeders A and C without compromising effectiveness of unbalance compensation.…”

Section: Deployment Of Bess For Voltage Unbalance Mitigationsupporting

confidence: 92%

“…As a result, a BESS with lower rating may be installed at feeders A and C without compromising effectiveness of unbalance compensation. In this work, the same battery size was considered at all locations for simplicity, but in a practical application the battery rating will be chosen as a compromise between performance, cost, ancillary services provided and their remuneration [31].…”

Section: Deployment Of Bess For Voltage Unbalance Mitigationmentioning

confidence: 99%

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Coordinated Control of Three Single–Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance

Mexis

Todeschini

Zhou

2022

IEEE Trans. Energy Convers.

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This paper proposes a control algorithm for singlephase battery inverters to provide voltage unbalance compensation in distribution networks with high penetration of photovoltaic panels and electric vehicles. A typical distribution system is studied to quantify the impact of single-phase loads and generating units on voltage unbalance levels, and identify the conditions that lead to the highest voltage unbalance. Voltage unbalance compensation is then performed by regulating active and reactive power exchange between three single-phase battery energy storage units and the power grid. The proposed control strategy consists of an upper level control system to coordinate the three units by sending active and reactive power reference signals, and a BESS control system to regulate active and reactive power exchange between each single-phase inverter and the grid. Simulation results show that the effectiveness of this approach depends on the location where the energy storage units are installed. The positive impact of the proposed methodology on balancing the power flow and reducing the transformer zerosequence current is also demonstrated. Finally, Hardware-In-The-Loop (HIL) experiments are carried out to provide validation of the control algorithm in real-time.

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Section: Deployment Of Bess For Voltage Unbalance Mitigationsupporting

confidence: 92%

Section: Deployment Of Bess For Voltage Unbalance Mitigationmentioning

confidence: 99%

Coordinated Control of Three Single–Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance

Mexis

Todeschini

Zhou

2022

IEEE Trans. Energy Convers.

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“…For example, it was found that the maximum power exchange between the BESS and the grid is 3 kW and 4 kW for BESS placement at feeder A and C, respectively. These results are in agreement with the ones obtained in [118], where it was shown that the BESS power exchange is reduced when BESSs are placed downstream due to lower load demand at these locations. As a result, a BESS with lower rating may be installed at feeders A and C without compromising the effectiveness of unbalance compensation.…”

Section: Deployment Of Bess For Voltage Unbalance Mitigationsupporting

confidence: 92%

“…As a result, a BESS with lower rating may be installed at feeders A and C without compromising the effectiveness of unbalance compensation. In this work, the same battery size was considered at all locations for simplicity, but in a practical application the battery rating will be chosen as a compromise between performance, cost, ancillary services provided and their remuneration [118]. (p c i,LV ) the proposed control strategy for BESS units connected at busbar LV, respectively.…”

Section: Deployment Of Bess For Voltage Unbalance Mitigationmentioning

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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An Advanced Control Strategy for a Weak Grid-Connected DG for Enhancing Voltage Support During Co-occurrence of Sag and Swell

Maganti,

Padhy

2024

IEEE Trans. Power Electron.

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Mitigation of Voltage Unbalace in Rural Low Voltage Networks Using Single-Phase Bess Inverters

Cited by 3 publications

References 0 publications

Coordinated Control of Three Single–Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance

Coordinated Control of Three Single–Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance

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

An Advanced Control Strategy for a Weak Grid-Connected DG for Enhancing Voltage Support During Co-occurrence of Sag and Swell

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