Locating Multi Types of FACTS for Congestion Management in Deregulated Power Systems Considering Voltage Stability

Abstract

Congestion management is a vital and important problem especially in deregulated power system and may lead to system collapse. So, system operator should be ready to relieve congestion as fast as possible to keep system reliability and stability. There are many methods for congestion management; using Flexible Alternating Current Transmission Systems (FACTS) devices is considered an effective solution for removing congestion in transmission lines employing Optimal Power Flow based methods. Due to congestion problem, the system may be deteriorated and lead to voltage instability and this appears in reducing voltage stability margin (VSM (which is used as an index for voltage stability. In this paper Multi-Types of FACTS devices are used to solve the congestion problem, and because of the high cost of FACTS devices, the optimal locations and sizes is determined by solving the objective function which consists of two parts, maximizing the social welfare (SW), and maximizing the VSM to ensure system stability. The objective function is solved using the Genetic Algorithm (GA). The proposed method is applied on IEEE 14-bus test system and the results confirm the efficiency of the proposed method.