Optimal location of unified power flow controller for congestion management

Abstract

SUMMARYIn deregulated environments, electricity companies are likely to experience an increase in the number of daily market transactions. High penetration of renewable energy generation is likely to bring further uncertainty of network management in terms of power flows and voltages where the systems are being operated towards their limits. Subsequently the stressed systems would result in congestion in transmission networks. Therefore, effective means for congestion management of transmission networks will become increasingly important, particularly for transmission system operators (TSOs). The benefits of using flexible AC transmission system (FACTS) controllers on transmission networks for static and dynamic control are well recognized. In this paper, a sensitivity based three-step optimization method, capable of determining the congestion cost, optimal location and rating of a unified power flow controller (UPFC) is presented. A bilateral electricity market model is assumed and the proposed method is illustrated using the IEEE 30 bus system. Results show high congestion cost reductions, which reinforces the UPFC as a viable solution. In addition, it is shown that the sensitivity based method is efficient at identifying the vicinity of the optimal location for installation, as the number of required simulations is kept to a minimum.

Multilayer feed-forward neural network approach for optimal dispatch of UPFC embedded pool-bilateral electricity market

“…If transmission congestion becomes a factor [25], the adjustment of generation can relieve congestion thereby avoiding overload of certain lines. Assumption (c) corresponds to determination of UPFC location [26] for relieving congestion. In general, the objectives of UPFC placement may be the minimization of active power losses, minimization of reactive power losses and maximization of relief of congestion in the system.…”

Mathematical modelling and analysis of generalised interline power flow controller: an effect of converter location

“…The steady state modelling and algorithms, applications of UPFC by voltage control power flow is presented by Liu (2007a, 2007b). The effect of UPFC location for congestion management is given by Chong, Zhang, Godfrey, Yao, and Bazargan (2010).…”

Optimal placement method of multi UPFCs to damp power system oscillations

“…In the literature, to get optimal power flow, immune algorithm is used for optimal placement of UPFC. The authors in previous studies have used static parameters such as voltage stability index, load factor, and numerical methods to try locating UPFC. In Chang et al, the placement of multi UPFCs is investigated using a numerical method based on power flow equations, and the results of the effect of each UPFC is presented.…”