Maximum Allowable PV Penetration by Feeder Reconfiguration Considering Harmonic Distortion Limits
Vemula Mahesh Veera Venkata Prasad, R. Madhusudhana Rao, Mrutyunjay Mohanty "Maximum Allowable PV Penetration by Feeder Reconfiguration Considering Harmonic Distortion Limits", International Journal of Engineering Trends and Technology (IJETT), V51(1),32-40 September 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
In recent days the renewable energy sources are having important role in power system area because the availability of conventional sources are decreasing exponentially and also due to global warming and cost of conventional sources. More consumers are opting for Solar PV as an alternative source for energy due to many attractive schemes. The Solar PV system will inject the current harmonics because the PV plants having power electronic devices like inverters. Individual current harmonic can be neglected but cumulative impact of current harmonics can elevate voltage harmonic distortion. So many regulations are there to limit the transformer wise and feeder wise net PV penetration to avoid harmonic distortion. Because of these reasons any new PV addition can be approved, if and only if harmonic distortion remains in acceptable limit. Harmonic distortion varies in feeder with PV penetration at different zones, like: near to substation, mid-section of feeder, or tail end of feeder. More PV can be allocated to substation end as compared to tail end; based on the network impedance seen from tail end will be more. A harmonic distortion limits also one of main constraint to add the new solar PV systems with existing power system. This paper presents the methodologies to reconfigure the loads between two parallel moving radial feeders optimally to find the maximum PV capacity that can be allocate in a distribution feeder without violating the harmonic distortion limits specified by IEEE-519 standard. MATLAB-2015b is used for programming and the network modelling and analysis and results are verified by using MiPower.9.1.
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Feeder reconfiguration, PV penetration, Equivalent network, Network driving point impedance, Harmonic distortion.