Determination of maximum PV solar system connectivity in a utility distribution feeder

Varma, Rajiv K.; Berge, Jon; Axente, Iurie; Sharma, Vinay; Walsh, Ken

doi:10.1109/tdc.2012.6281694

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…An investigation to study the maximum PV connectivity in a Utility distribution feeder has been carried out by Varma, Berge, Axente, Sharma and Walsh [23]. The study evaluates the effect of introducing To perform the test, a short circuit has been placed between phase and ground until the inverter tripped off.…”

Section: Impact Of Pv Inverters On System Fault Levelsmentioning

confidence: 99%

“…Such issues are more relevant for high voltage power distribution networks as recloser is typically used in high voltage networks only. Some literatures have analysed fault current contributions from PV systems but studies described therein are related mainly to high voltage power networks [23]. A detailed investigation of protection and voltage regulation issues caused due to high penetration of PV systems in low voltage has been discussed in some literature [27] [31].…”

Section: Chapter 5 Impact Of Fault Contribution From Large Three Phasmentioning

confidence: 99%

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Power system protection problems caused by grid connected PV systems

Bhattacharya¹

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Renewable energy sources are clean sources of energy which do not cause emission of greenhouse gases. Wind and solar power are the two most common sources of renewable energy. About two decades back active research work started on improving efficiencies of technologies employed in converting renewable energy sources into electrical energy. With the present concern about climate change and regulations for reduction in carbon-dioxide emissions, development of efficient systems for conversion of solar powers to electricity is considered as a subject of high importance. One of the most common technologies used to convert solar power to electrical power is solar photovoltaic (PV) cells. Proper utilization of solar power can lead to significant reduction of greenhouse gas emissions, but there are several problems associated with large scale generation of power using PV cells. Currently small units rated for individual residences to large megawatt rated PV power generation units are embedded throughout the distribution system. In conventional power distribution network, power is generated centrally and then distributed in a radial network. With distributed generation using PV cells, there are several points of power generation in a system. Conventional methods of protective relaying originally developed for radial distribution do not hold up well in all situations with distributed generators embedded in power system. This is due to the change in fault levels caused by the contribution from distributed generators during faults. Additionally there are several situations of unintentional islanding and problems associated with reconnection of distributed generator with utility. This thesis describes the research work carried out to analyse the protection problems associated with high penetration level of a PV type distributed generator. The main objective of this research work is to investigate the impact of incremental penetration of PV systems on protection issues of low voltage network in suburban distribution systems and to recommend measures to mitigate the protection problems. Photovoltaic generators of small and large sizes have been considered for the purpose of this investigation. Protection problems caused by single phase PV generator installed in individual residences as well as large three-phase PV generators installed in buildings with multiple apartments in a housing complex has been studied. Potential issues in protection system have been identified using a number of different case studies and mitigation measures have been recommended. Finally, future work to extend and further investigate the research has been suggested. This work has been accomplished through the generosity and support of my adviser Prof Tapan Saha. First and foremost, I would like to give my sincere gratitude to my adviser for his valuable guidance throughout the duration of this project. I also convey my heartfelt gratitude to my coadviser Dr Jahangir Hossain for his guidance and advice. It has been a wonderful journey to work under the s...

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Section: Impact Of Pv Inverters On System Fault Levelsmentioning

confidence: 99%

Section: Chapter 5 Impact Of Fault Contribution From Large Three Phasmentioning

confidence: 99%

Power system protection problems caused by grid connected PV systems

Bhattacharya¹

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Impacts of High Penetration of Solar Pv Systems and Smart Inverter Developments

2021

Smart Solar PV Inverters With Advanced Grid Support Functionalities

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Method for Determining a PV Generation Limit on Low Voltage Feeders for Evenly Distributed PV and Load

Heslop¹,

MacGill²,

Fletcher³

et al. 2014

Energy Procedia

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This paper presents a novel method for assessing the maximum allowable PV generation on low voltage feeders. It identifies a relationship between load, total feeder impedance, terminal count and PV generation at which the upper voltage limit for the line is breached. Identifying such a relationship alleviates the need for Distribution Network Service Providers (DNSPs) to perform load flow calculations on a case by case basis. It also increases a DNSP's understanding of power flow in low voltage feeders and potentially enables them to develop improved strategies for managing PV on their networks. Using feeder models provided by a DNSP servicing the Australian city of Sydney's Greater West region, a substantial number of load flow calculations were performed for wide variations in feeder impedance, load and PV generation. The PV generation range is chosen such that a breach of the upper voltage limit occurs on the line. The feeder voltage profile from these simulations are analysed in Matlab to determine PV generation limits. For evenly distributed PV and load, results show a linear relationship between this PV generation limit and load for a given terminal count and a second relationship between the PV generation limit and terminal count. It is then demonstrated that through the combination of these two relationships the PV generation limit can be determined for a given load, terminal count and total feeder impedance.

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Determination of maximum PV solar system connectivity in a utility distribution feeder

Cited by 7 publications

References 12 publications

Power system protection problems caused by grid connected PV systems

Power system protection problems caused by grid connected PV systems

Impacts of High Penetration of Solar Pv Systems and Smart Inverter Developments

Method for Determining a PV Generation Limit on Low Voltage Feeders for Evenly Distributed PV and Load

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