Interactive impacts of elements of distribution systems and PV on network harmonic resonance

As more number of distributed generators like PV are penetrated into the power system network, the interaction of the filter elements associated with PV inverter and rest of the distribution system elements on network resonance needs to be investigated. Although the recent investigation of network resonance is focusing only on distributed generators like PV, the impact from distribution lines coming from substation and underground cables that possesses the line charging capacitances (including the variation in line length), VAR support capacitors for voltage regulation and power factor correction capacitors in the system, inductive loads in the distribution systems needs a detailed investigation on resonance. The resonance phenomenon can be witnessed in the presence or even without the presence of distributed generators. With the increase in distributed generators, the interaction between them and the elements in the system presents a higher probability of network resonances that needs more attention. Power quality planning require the researchers and engineers to perform such studies to witness the impact of elements in distribution systems. There are limited papers that have done detailed research studies, projecting the impact of elements of distribution systems on network resonances. This paper brings out a contribution that would serve as a reference for researchers and power system planning engineers to plan on several aspects pertaining to power quality.