Estimation of Operating Reserves for High Wind Penetration Systems using Reliability based Analysis

Abstract

With the addition of variable energy sources into the electric power system, the way in which the system is planned and operated in the past needs significant change. The main effect is on balancing the supply and demand due to the increase in variability and/or uncertainty and hence operating reserves which are used to balance supply and demand need significant system wise analysis. Power system operators are evolving alternate approaches, changing the rules and practices to take care of new trends of complexities. In this paper a new methodology has been proposed to estimate the required operating reserves in the system with high penetrations of wind power through reliability analysis which would be useful to the system operators. This estimation of operating reserve directly helps for scheduling programs which are used to schedule conventional units. The methodology considers generation outages; system load forecast errors; low and high wind seasons; variability and uncertainty of variable energy sources. The proposed methodology is first applied to RBTS for validation and studies are performed on IEEE-RTS and practical power system, where high penetration of wind power exists. The results illustrate that the need of dynamic operating reserves for power systems where high penetration levels of wind generation exists.