Reliability Improvement of Restructured Power Systems with Diversified Demand Side Load Shift

This paper presents an evaluation technique incorporating the impact of the diversified demand side load shift on the system reliability and nodal reliabilities of restructured power systems. In this technique, demand and price correlations are represented using a demand-price elasticity matrix which consists of self/cross-elasticity coefficients. The diversity of customers is represented using different demand price elasticity matrices. Nodal prices are determined using Optimal Power Flow (OPF). The OPF based reliability evaluation technique is used to appraise the reliability improvement of restructured power systems considering diversified demand side load shift. The IEEE Reliability Test System (RTS) is simulated to illustrate the developed techniques. The simulation results show that diversified demand load shift improves both the system reliability and nodal reliabilities of restructured power systems. Diversified demand side load shift can therefore be utilized as a possible efficient tool to improve the reliability of restructured power systems.