Frequency-based method for fast-response reserve dispatch in isolated power systems

A methodology is proposed, for the fast-response reserve (FRR) dispatch in an isolated power system with frequency-based reserve constraints (FBRC), and implemented on the Taiwan power system. The fast-response reserve has two functions: regulating frequency and offering an emergency reserve. The FRR is provided by several sources, primarily, generator, load shedding and natural fall in demand due to falling system frequency. The paper deals only with FRR from generator response, which includes pumped storage. The load-frequency sensitivity factor (LFSF) is used to evaluate network behaviour following a contingency. The paper suggests that the one-minute recovery frequency following a contingency would be a more appropriate measure of system security and would represent an enhanced reserve policy. Three actual examples are used to study the influence of FRR on system security and to examine the merits of the methodology.