Energy Storage System for Mitigating Voltage Unbalance on Low-Voltage Networks With Photovoltaic Systems

Chua, Kein Huat; Lim, Yun Seng; Taylor, Phil; Morris, Stella; Wong, Jianhui

doi:10.1109/tpwrd.2012.2195035

Cited by 140 publications

(73 citation statements)

References 10 publications

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“…Additionally, an energy store has been used to control voltage unbalance levels to below 0.8% when the energy store was placed on the same phase as the distributed generator [38]. With high levels of PV penetration it is expected that distributed generation will be installed on each phase, as such, for effective voltage unbalance mitigation a 3 phase connection is required, or separate batteries on each phase.…”

Section: Feeder Connected Battery Considerationsmentioning

confidence: 99%

Comparative analysis of domestic and feeder connected batteries for low voltage networks with high photovoltaic penetration

Hilton

Cruden

Kent

2017

Journal of Energy Storage

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Excessive voltage and power flow issues associated with domestic solar power are threatening UK distribution system operation and the use of energy storage is one method proposed to mitigate these issues. In this study a data orientated approach was taken in order to simulate the effect of the location of the energy storage on the low voltage network. A number of small (<15kWh) domestic batteries were compared to a single larger (>50kWh) feeder connected battery in terms of their ability to shave load demand peaks, fill load demand valleys and counter voltage violations on a typical radial feeder system. To achieve this MatLab was used to create dispatch strategies for each battery and introduce them into an aggregated load, and OpenDSS was then used to model this scenario on a typical UK radial feeder based on the IEEE European Low Voltage Test Case.It was found that the feeder connected battery was more successful at mitigating the thermal overload effects of distributed generation at the low voltage level. Domestic batteries offer ease of installation and consumer support, likely to make their utilisation increasingly inevitable. However, their exposure to domestic energy flows and focus on minimising grid import to the home led to a reduced network level impact. This work shows that a feeder connected battery can respond to the power flows of the aggregated load and thus provides a far more capable tool for reducing network peak loads and preventing feeder system export.

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Section: Feeder Connected Battery Considerationsmentioning

confidence: 99%

Comparative analysis of domestic and feeder connected batteries for low voltage networks with high photovoltaic penetration

Hilton

Cruden

Kent

2017

Journal of Energy Storage

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“…System objectives can also be pursued; indeed, voltage profiles as well as other PQ aspects (such as unbalances) can be improved by controlling EESSs smart interfacing converters. For instance [2] proposed the compensation of unbalances by adequately using storage systems.…”

Section: Introductionmentioning

confidence: 99%

A New Hybrid Approach Using the Simultaneous Perturbation Stochastic Approximation Method for the Optimal Allocation of Electrical Energy Storage Systems

et al. 2018

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This paper deals with the optimal allocation (siting and sizing) of distributed electrical energy storage systems in unbalanced electrical distribution systems. This problem is formulated as a mixed, non-linear, constrained minimization problem, in which the objective function involves economic factors and constraints address the technical limitations of both network and distributed resources. The problem is cumbersome from the computational point of view due to the presence of both constraints of an intertemporal nature and a great number of state variables. In order to guarantee reasonable accuracy-although limiting the computational efforts-a new approach is proposed in this paper: it is based on a Simultaneous Perturbation Stochastic Approximation (SPSA) method and on an innovative inner algorithm, which allows it to quickly carry out the daily scheduling (charging/discharging) of the electrical energy storage systems. The proposed method is applied to a medium voltage (Institute of Electrical and Electronics Engineers) IEEE unbalanced test network, to demonstrate the effectiveness of the procedure in terms of computational effort while preserving the accuracy of the solution. The obtained results are also compared with the results of a Genetic Algorithm and of an exhaustive procedure.

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“…A new mitigation strategy is therefore necessary which can provide a dynamic balancing effect under the variably power unbalance produced by solar PV units and load demands. A method for voltage unbalance mitigation using energy storage has been proposed in [18]. In a previous work [2], the authors have explored the application of distributed energy storage devices integrated with rooftop PV systems for the mitigation of neutral current and NGV problems.…”

Section: Introductionmentioning

confidence: 99%

Community Energy Storage for Neutral Voltage Rise Mitigation in Four-Wire Multigrounded LV Feeders With Unbalanced Solar PV Allocation

Alam

Muttaqi

Sutanto

2015

IEEE Trans. Smart Grid

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, "Community energy storage for neutral voltage rise mitigation in four-wire multigrounded LV feeders with unbalanced solar PV allocation," IEEE Transactions on Smart Grid, vol. 6, (6) pp. 2845Grid, vol. 6, (6) pp. -2855Grid, vol. 6, (6) pp. , 2015 Community energy storage for neutral voltage rise mitigation in four-wire multigrounded LV feeders with unbalanced solar PV allocation AbstractThe traditional neutral voltage problem in low-voltage (LV) four-wire multigrounded distribution networks can be aggravated due to an unbalanced allocation of one-phase photovoltaic (PV) units. Inherent limitations restrict the performance of the traditional strategies to mitigate the combined effect of load and PV unbalance. To overcome the shortcoming of traditional approaches, a new dynamic mitigation approach using community energy storage (CES) is proposed in this paper. A power balancing algorithm is developed to perform the balancing operation while minimizing power drawn from the CES. A charge/discharge control strategy is developed that will continuously balance and dynamically adjust the power exchange with the grid in a real time, and mitigate the neutral current and neutral voltage rise. To investigate the applicability of the proposed approach under physical time delays associated with battery and PV systems, a suitable dynamic model is developed. An Australian LV distribution system is used to verify the proposed approach under daylong variations of load and PV, and also during short-term variations of PV output caused by cloud passing. NOMENCLATURE i, p, kIndex for bus, phase, and time instant, respectively.

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Energy Storage System for Mitigating Voltage Unbalance on Low-Voltage Networks With Photovoltaic Systems

Cited by 140 publications

References 10 publications

Comparative analysis of domestic and feeder connected batteries for low voltage networks with high photovoltaic penetration

Comparative analysis of domestic and feeder connected batteries for low voltage networks with high photovoltaic penetration

A New Hybrid Approach Using the Simultaneous Perturbation Stochastic Approximation Method for the Optimal Allocation of Electrical Energy Storage Systems

Community Energy Storage for Neutral Voltage Rise Mitigation in Four-Wire Multigrounded LV Feeders With Unbalanced Solar PV Allocation

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