Optimal Coordination of Series Facts Controller for the Solution of Voltage Constrained Reactive Power Planning

Abstract

Owing of the liberalization of the electrical industry, grid interconnection, and rising electricity demand, the power system network is under considerable amount of stress. The rapidly expanding business of electrical energy over enormous transmission ranges has a foundation in the expansion of the power market. However, the market for electricity has also increased rivalry among companies to provide power to customers at a lower cost, which poses a risk to the reliability of the power system. Over the years, alternating current (AC) in electric power systems has come to be understood as being significantly influenced by reactive power planning, or RPP. As a fundamental observation, it has been noted that the network components' impedances are primarily reactive. Reactive power (Q) must therefore be present in sufficient amounts in the systems in order for active power to flow through the power transmission lines. Different components of the power system experience significant outages as a result of load changes causing deviations from the reactive power saturation point. This thesis provides a thorough examination of state-of-the-art methods applied to RPP, ranging from traditional to cutting edge. It also discusses some significant theoretical advancements and how RPP is affected mathematically by them. This study suggests novel planning techniques to help with RPP problem solutions in power transmission networks without sacrificing financial gain. The goal function, or total operating cost, adds up the expenses associated with actual power outages, shunt capacitors and cost of the TCSC to the system. This study suggests using hybrid algorithm to reduce overall running costs and electricity losses by magnifying voltage profile. It is advisable to use some economical and effective controls, such as load shedding, generation rescheduling, FACTS devices, etc., for the removal or minimizing of congestion or voltage violations. Finding the best allocation to place series-type FACTS devices is the aim of the proposed effort, which aims to solve the connected power system's reactive power planning issue. The VCPI approach and power flow analysis are used to determine the best position for the FACTS devices. For the purpose of RPP, shunt capacitors were initially installed in the designated places in addition to other traditional VAR sources. Subsequently, reactive power planning was carried out and a series type of FACTS device, specifically TCSC, was added to the power network with other existing VAR sources. Finally, using metaheuristic algorithms, the ideal sizes of the TCSC and other reactive power sources are found while refraining acceptable voltage profile at each bus. This minimizes the true power loss and operational cost of the connected power network