Impacts of residential photovoltaic power fluctuation on on-load tap changer operation and a solution using DSTATCOM

Yan, Ruifeng, Marais, Brandon and Saha, Tapan Kumar (2014) Impacts of residential photovoltaic power fluctuation on on-load tap changer operation and a solution using DSTATCOM. Electric Power Systems Research, 111 185-193. doi:10.1016/j.epsr.2014.02.020


Author Yan, Ruifeng
Marais, Brandon
Saha, Tapan Kumar
Title Impacts of residential photovoltaic power fluctuation on on-load tap changer operation and a solution using DSTATCOM
Journal name Electric Power Systems Research   Check publisher's open access policy
ISSN 0378-7796
1873-2046
Publication date 2014-06-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.epsr.2014.02.020
Volume 111
Start page 185
End page 193
Total pages 9
Place of publication Lausanne, Switzerland
Publisher Elsevier
Language eng
Abstract Recently penetration of Photovoltaic (PV) systems in Low Voltage (LV) distribution networks has drastically increased. The stochastic nature of PV output coupled with the characteristic of high R/X ratio of LV distribution network results in a direct correlation between PV power and voltage fluctuations. Currently distribution networks rely heavily on existing On Load Tap Changing (OLTC) transformers to mitigate voltage fluctuations. However, during the regulation process OLTC transformers can experience excessive tap changing with high PV penetration, which in turn results in an increased maintenance requirement and shorter lifetime. Without the knowledge of how an increase in PV penetration impacts the operation of an OLTC, a Distribution Network Operator (DNO) cannot effectively coordinate compensation. This paper examines the effect of PV penetration levels on OLTC transformers and voltage regulation. The investigation of tap changing frequencies and voltage profiles is done through quasi-static time-series simulations using a residential street network and one year real world data obtained from local DNOs and research institutes. Then, a mitigation strategy is developed using a Distribution Static Compensator (DSTATCOM) and interaction between OLTC and DSTATCOM is also analyzed. This will enable DNOs to choose an appropriate size of DSTATCOM based on economic and technical requirements of voltage regulation.
Keyword Distribution system
Photovoltaic
PV power variability
Tap changer transformer
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Tue, 08 Apr 2014, 11:25:55 EST by System User on behalf of School of Information Technol and Elec Engineering