Generation dispatch with large-scale photovoltaic systems

The objective of this paper is to explore the role of generation dispatch strategy and spinning and non-spinning reserve methods in solving challenges posed by grid-connected large-scale PV systems as opposed to the commonly used approaches such as voltage, rotor angle and frequency control methods. The investigation covers the issues associated with the inherent intermittent of PV output, which results in additional operational challenges such as load-following requirements, spinning reserve requirements, load frequency excursions and system stability. A detailed performance evaluation of generation dispatch with large-scale PV systems is carried out in this research work based on the IEEE 14-bus test system using the MATLAB-based Power System Analysis Toolbox (PSAT). An analysis is conducted by using the power flow analysis methods such as power flow (PF), continuation power flow (CPF) and time domain (TD) analysis to gain an understanding of the influence that large-scale PV systems have on sub-transmission and transmission networks. The outputs of the study can be used to work out the appropriate penetration level of large-scale PV systems that can minimize their negative impacts on sub-transmission and transmission systems.