Combined FACTS and Microgrid-Based Congestion Management in Transmission Lines

Abstract

Relieving transmission congestion is a prime technical issue in deregulated power systems. The different schemes are available to manage congestion, which already presented in the different literatures. In this work, coordinating flexible AC transmission system device and microgrid-based congestion method is proposed. The objective of this proposed method is to relieve the transmission congestion with more benefits in terms of reducing the operating cost and maintaining the system in a secure state. The first step is to create the congestion problems in multiple transmission lines by increasing load (up to 20%) and line outages (more than two lines). Second step is to relieve multiple lines congestion by coordinating FACTS device and microgrids, where one of the FACTS device TCSC and one of the microgrid-based DG units are used. Combination of these device is placed simultaneously (one by one) at their optimal locations till relieving the congestion in the system. The proposed approach is validated on IEEE 118-bus test systems. The optimal power flow solutions (OPFS) of the test system are obtained by both primal linear programming (PLP) and genetic algorithm (GA) methods. All the results have been obtained from power world simulator and MATLAB.