ENHANCED PART LOAD OPERATION OF DIESEL HYBRID MINI-GRIDS WITH HIGH PENETRATION OF PHOTOVOLTAICS
DOI:
https://doi.org/10.59627/cbens.2010.1496Palavras-chave:
diesel driven generators, oad frequency control, photovoltaic power systems, power distributionResumo
Renewable energy sources such as wind and photovoltaic (PV) have great potential for reducing fuel consumption in diesel-based mini-grids in remote communities. However, the fluctuating and intermittent nature of these sources can give rise to a number of problems in mini-grids with high penetration of non-dispatchable renewables with reduced or non-existent storage units. This paper proposes the use of a frequency x power droop control strategy for curtailing the output power of PV inverters during periods of excess of power in a diesel-dominated mini-grid. This approach reduces the operation of the diesel genset under part (light) load conditions, reducing frequency variation, and avoids overvoltages in the mini-grid. The theoretical analysis is verified by means of digital simulations with PSCAD.
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