IGDT-based robust decision making applied to merchant-based transmission expansion planning

Abstract

Summary Deregulation in power systems has created new uncertainties and increased the previous ones. The presence of these uncertainties causes the transmission network to remain monopoly and the private investors not being interested in investing in this section. This paper presents a new merchant‐based transmission expansion planning (TEP) formulation from the viewpoint of private investors. The information‐gap decision theory (IGDT) is used to model the inherent uncertainties associated with the estimated investment cost of candidate lines and the forecasted system load and NSGAII is utilized to solve the multi‐objective optimization problem. This algorithm helps private investors to select the best lines for investment in the presence of uncertainties. In order to verify the effectiveness of the proposed method, it has been applied to the IEEE RTS 24‐bus system and the simplified Iranian 400‐kV transmission system. Copyright © 2016 John Wiley & Sons, Ltd.

Stochastic multi‐stage model for co‐planning of transmission system and merchant distributed energy resources

“…The LDC shown in Fig. 1 is the same for all load buses and will not change during expansion process. The investments in DERs and lines are done in the first year of each stage and they will be ready to use immediately [24]. The cost of buying energy from generators and DERs is calculated for a single year in each stage and will be transferred to the present. The demand is assumed inelastic and the generators are bidding by their marginal costs [25, 26].…”

“…The investments in DERs and lines are done in the first year of each stage and they will be ready to use immediately [24].…”

“…It is assumed that new transmission lines can be installed in the current available corridors in addition to seven new corridors, totalling 41 rights of way and up to three new lines can be installed per existing/new corridors [24]. In addition, in this case, the capacity on the transmission lines between buses (15,21), (14,16), and (13,23) is reduced to 400, 250, and 250 MW, respectively, to introduce congestion in the transmission system [37].…”