The dynamic performance and effect of hybrid renewable power system with diesel/wind/PV/battery

Diesel generators often supply electric power to isolated islands and off-grid remote loads. In remote locations, the cost of fuel can be very high due to the limited accessible transportation. Inclusion of renewable energy into diesel-based grids results in a hybrid renewable energy system (HRES) and can reduce fuel consumption and environmental pollution. However, the output variability of renewable energy sources injected into diesel-based systems may impact the power quality and stability of the power system. The operation of HRES requires a good understanding of the dynamic behavior of each energy source connected to the system. This work focuses on the dynamic performance and effects of renewable energy sources on power quality and stability of the power system. A simulation program called the RPM-Sim (renewable-energy power-system modular simulation) is used to investigate the case studies. Dynamic and transient events (wind variation, fault events, etc.) are studied and improvement of power quality and stability for the cases identified below are presented in this paper.

I. Introduction

As an alternative to utility power, diesel generators are often installed in remote locations to supply electric power to isolated and off-grid remote loads. In remote locations, the cost of fuel can be very high due to the limited accessible transportation. Therefore, diesel-based electricity production for the local power system is relatively expensive. On the other hand, renewable energy technology has been rapidly developing since the early 1970s[1], due in large part to concerns of availability and undesirable emissions of fossil fuel.