Since its introduction, distributed generation (DG) has surely allowed the exploitation of otherwise unrecoverable energy resources dispersed on the territory, though posing a series of as yet unsolved problems connected to smart grid operation. One of these inconveniences is the automatic DG disconnection in weak network. Actually, for a DG system to be able to inject power into a grid, the voltage value in its interconnection node must be increased. If voltage exceeds a certain limit, the current Protection System Interface (SPI) will disconnect the generator resulting in the total loss of the energy produced at that node. This paper proposes a number of solutions to the issue, making specific reference to inconveniences that actually occurred in DG systems installed in some Italian rural areas, but that might as well affect areas with higher load densities. During a first phase of the study, the current situations were analyzed and then a circuit model was implemented in a Matlab-Simulink environment to obtain an accurate system simulation. The DG taken into consideration mainly involved photovoltaic systems connected to LV networks, of different sizes and supposedly working in different operating conditions, depending on load demand and weather conditions. The results of the numerical simulation were properly illustrated and discussed, so as to establish the actual validity of the proposed solutions. © 2015 IEEE.

Maximizing energy injections of distributed generation in rural areas / Muzi, Francesco; Pompili, Massimo. - STAMPA. - 2015:(2015), pp. 1-5. (Intervento presentato al convegno IEEE Power and Energy Society General Meeting, PESGM 2015 tenutosi a Denver, CO, USA nel 2015) [10.1109/PESGM.2015.7286175].

Maximizing energy injections of distributed generation in rural areas

MUZI, FRANCESCO;POMPILI, Massimo
2015

Abstract

Since its introduction, distributed generation (DG) has surely allowed the exploitation of otherwise unrecoverable energy resources dispersed on the territory, though posing a series of as yet unsolved problems connected to smart grid operation. One of these inconveniences is the automatic DG disconnection in weak network. Actually, for a DG system to be able to inject power into a grid, the voltage value in its interconnection node must be increased. If voltage exceeds a certain limit, the current Protection System Interface (SPI) will disconnect the generator resulting in the total loss of the energy produced at that node. This paper proposes a number of solutions to the issue, making specific reference to inconveniences that actually occurred in DG systems installed in some Italian rural areas, but that might as well affect areas with higher load densities. During a first phase of the study, the current situations were analyzed and then a circuit model was implemented in a Matlab-Simulink environment to obtain an accurate system simulation. The DG taken into consideration mainly involved photovoltaic systems connected to LV networks, of different sizes and supposedly working in different operating conditions, depending on load demand and weather conditions. The results of the numerical simulation were properly illustrated and discussed, so as to establish the actual validity of the proposed solutions. © 2015 IEEE.
2015
IEEE Power and Energy Society General Meeting, PESGM 2015
distributed generation; inverter phase-shift control; rural active networks; smart grids; voltage control; energy engineering and power technology; nuclear energy and engineering; renewable energy; sustainability and the environment; electrical and electronic engineering
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Maximizing energy injections of distributed generation in rural areas / Muzi, Francesco; Pompili, Massimo. - STAMPA. - 2015:(2015), pp. 1-5. (Intervento presentato al convegno IEEE Power and Energy Society General Meeting, PESGM 2015 tenutosi a Denver, CO, USA nel 2015) [10.1109/PESGM.2015.7286175].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/969606
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