Electrical and Electronic Engineering - Research Publications

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    Multi-year planning of LV networks with EVs accounting for customers, emissions and techno-economics aspects: A practical and scalable approach
    Quiros-Tortos, J ; Ochoa, LF (Institution of Engineering and Technology, 2020-11-30)
    The uptake of electric vehicles (EVs) is expected to trigger investments to adapt existing distribution networks, particularly in the low voltage (LV). To make adequate, holistic planning decisions over multiple years, the assessment of alternatives—such as reinforcements or the adoption of EV management strategies—must not only capture when the investments are needed but also the effects on customers and carbon emissions, all while accounting for uncertainties. This paper proposes a stochastic, practical, and scalable progressive multi-year planning methodology that considers technical, customer, economic and environmental aspects to make holistic planning decisions for existing LV networks to accommodate EVs. The proposed rule-based methodology contrasts the net present value and benefits of four planning alternatives: network reinforcements, EV charging point management, and their combinations. Uncertainties are catered for by adopting a Monte Carlo approach. Using two real UK LV networks and realistic time-series data, results demonstrate the importance of a holistic decision-making approach. From an economic perspective, EV management is better for voltage issues, and reinforcements for thermal problems. However, when customer effects are considered, the management can lead to unacceptable charging delays. Combinations, on the other hand, provide trade-offs between cost and the effects on customers or carbon emissions.
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    CVR and Loss Optimization Through Active Voltage Management: A Trade-off Analysis
    Gharavi, H ; Ochoa, LF ; Liu, X ; Paterson, G ; Ingham, B ; McLoone, S (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2021-12-01)
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    On the Implementation of OPF-Based Setpoints for Active Distribution Networks
    Liu, MZ ; Ochoa, LF ; Low, SH (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2021-07-01)
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    Advanced Planning of PV-Rich Distribution Networks - Deliverable 3: Traditional Solutions
    Procopiou, A ; Petrou, K ; Ochoa, L (Department of Electrical and Electronic Engineering, The University of Melbourne, 2020)
    This document investigates the adoption of traditional solutions such as change of off-load and on-load tap changer positions and/or network augmentation to increase the hosting capacity of PV-rich distribution networks considering the new Victorian Volt-Watt and Volt-var settings which mandates that both power quality response modes are enabled. Studies are performed on four fully modelled and significantly different HV feeders (i.e., urban and rural) considering time-series seasonal analyses with growing penetrations of solar PV. Findings show that enabling both Volt-Watt and Volt-var functions with the Victorian settings provides significant benefits to both DNSPs and customers. Voltage rise issues and curtailment are dramatically reduced, making it possible to host 20% of customers without the need for other solutions. Adopting traditional solutions can help increase the solar PV hosting capacity to 40% (excluding HV feeders with long SWER lines). However, beyond 40%, traditional solutions were found to have limited effectiveness in mitigating network issues.