5. 3 Operation, Performance and Maintenance of PV Systems
Performance, PV Irrigation Systems, Water-Pumping, Stand-Alone PV System
Summary / Abstract:
High-power diesel-based or grid-connected irrigation systems are giving way to high-power PV irrigation systems without batteries that reduce the energy costs by up to 80%. The design of these PV systems has not yet reached maturity and there are no experimental data available about their performance or their behavior against PV power fluctuations. This paper incorporates the definition of new indices used to assess both the robustness of the system to PV power fluctuations (the “Number of abrupt stops” and the “Passing-cloud resistance ratio”) and the performance (by factoring the traditional PR to determine the influence of different factors external to the system) and presents their experimental values for a battery-free 213 kWp PV irrigation system, pumping to a water pool. The system has been analyzed over two years of real operation. For example, the percentage of abrupt stops was 1.3%, the passing-cloud resistance ratio was 99.8% and the performance ratio was 64.7%.