ESTIMATION OF LOAD-FREQUENCY SENSITIVITY FACTOR AND REASONABLE SPINNING RESERVE REQUIREMENT IN THE TAIWAN POWER SYSTEM

摘要

A procedure for estimating the load-frequency sensitivity factor (LFSF) of a power system, using the frequency deviation following the loss of an online generating unit, is presented. The load-frequency sensitivity factor is used to evaluate network behavior following a contingency. This paper presents a new methodology for the estimation of the reasonable spinning reserve requirement (RSRR) in an isolated power system by considering the system's load-frequency sensitivity factor and the frequency-based reserve constraints (FBRC). The reasonable spinning reserve should have two functions: regulating frequency and offering an emergency reserve; therefore, the reasonable spinning reserve would be composed of frequency regulating reserve (FRR) and instantaneous reserve (IR). This paper proposes an effective method for real-time dispatch in the Taiwan power system to determine reasonable spinning reserve requirement based on the frequency response rate of prime movers, frequency operating standards and system status, such as load behavior, magnitude of system load, and frequency sensitivity of loads while satisfying the frequency-based reserve constraints. This study suggests that the one-minute recovery frequency following the loss of the largest on-line generator would be an appropriate measure of system security and would represent an enhanced reserve policy.