Solution of Optimal Power Flow Problem Incorporating Various FACTS Devices

Abstract

This research paper presents a new approach for placing the optimal location of FACTS controllers in a multi machine power system using mat lab coding. Using the proposed method, the location of FACTS controller, their type and rated values are optimized simultaneously. Among the various FACTS controllers, TCSC and UPFC are considered. OPF is one of the most important processes in power system, which improves the system performance by satisfying certain constraints.Generally, different optimization methods are used in the literature to solve the OPF problem. In some research works, the optimization process is done by considering total fuel cost or by considering the environmental pollution that occurs during power generation. But in some other research works, FACTS controllers are used to improve the power flow without considering the power generation cost.The OPF problem is one of the most extensively studied topics in the power system community. In power system operation, OPF is an extended problem of ED which considers several parameters such as generator voltage, transformer tap change, SVC, and includes constraints such as transmission line and transformer loading limits, bus voltage limit, and stability margin limit. The main function of OPF is to select the optimal operation state of a power system, in the time of meeting some particular constraints. OPF study plays a key role in the EMS, where the entire operation of the system is regulated in each possible real time intervals.

Optimal setting of DOC relay in distribution system in presence of D-FACTS

“…Is the reactance between bus-i and j. is the reactance of TCSC and is the coefficient which represents the compensation level of TCSC. The working range of reactance of TCSC is fixed between -0.7 (capacitive) X line and 0.2 (inductive) X line [29]. The TCSC is installed in the middle of the line; the three-phase fault equals the direct component is given by:…”

Optimal Power Flow Problem Solution Incorporating FACTS Devices Using PSO Algorithm

“…It can also increase the loadability, where additional loads can be added in the system without addition of new transmission and generating facilities [8]. FACTS have some relative merits and they are summarized as follow [2]:…”

“…FACTS devices can direct the active and reactive power to control voltagemagnitude control simultaneously, because of their adaptability and fast control characteristics. With the aid of FACTS technology, namely SVC, STATCOM, SSSC and UPFC etc., the bus voltages, line impedances and phase angles in the power system can be controlled quickly and flexibly [2]. Optimal power flow (OPF) is a nonlinear programming problem (NLP) which is used to minimize a desired objective function subject to certain system constraints by determining the optimal control parameter settings.…”

“…Simulation is carried out on the IEEE 30bus test system. In [2], UPFC is modeled as combination of a TCSC in series with the line and SVC connected in shunt across the corresponding buses. The proposed technique was implemented and tested using IEEE 14 & 30 bus systems.…”

Fuzzy Logic and Pso Based Hybrid Technique Formulation for Optimal Placement and Sizing of Interline Power Flow Controller

“…The reactive power support can be provided by special devices called as Flexible Alternating Current Transmission System (FACTS) devices. Moreover better utilization of the existing power system resources can be increased by installing FACTS controllers with economic cost [2]. The FACTS devices are the latest power electronics devices by which losses can be reduced and transfer capability can be enhanced [3].…”