ANALISIS STATIS DAN DINAMIS PENEMPATAN OPTIMAL DIVAIS FACTS UNTUK KEAMANAN OPERASI SISTEM

Flexible AC Transmission System (FACTS) in a power system plays a vital role in improving the performance of power systems, both static and dynamic, i.e. improve stability, increase security, improve the reliability of loading and reduce losses. FACTS must be optimally placed to implement such the vital role, because the development investment costs of FACTS are high. FACTS devices considered for placement are: Static Var Compensator (SVC), Thyristor Controlled Series Compensation (TCSC), Unified Power Flow Controller (UPFC) and the Generalized Unified Power Flow Controller (GUPFC). It is proposed in this study two techniques of determining the location of FACTS, the technique of the sensitivity of system loading factor and N-1 contingency criteria. The first technique, corresponds to the real and reactive power balance equation with respect to changes in the magnitude and phase angle of the voltage at each branch in the network. The second technique is the determination of the level of contingency for each branch in the network. Furthermore, the optimal location is determined in accordance with the highest absolute values obtained from these techniques. Four types of FACTS ie SVC, TCSC, UPFC and GUPFC each tested with static and dynamic performance analysis at that location. Static performance testing is done with power flow and optimal power flow (OPF) algorithm. Nonlinear Predictor- Corrector Primal-Dual Interior-Point Algorithm (NLPCPDIPA) is used with the objective function to optimize cost of supply, demand and loading parameters, the condition without or with FACTS to obtain an optimal power flow and parameters FACTS. Then, the static performance testing carried out by time-domain simulation. Testing is done by using simulation and using power systems IEEE 57-bus to obtain the performance of both static and dynamic systems. The type, location and parameters of FACTS device control can be determined from the best results of the above procedure which are based on the most outstanding dynamic stability values of the voltage profile, the lowest losses and the highest loading margin. The application of FACTS controllers is done to determine the optimal location of FACTS devices by selecting the type, determining the control parameters and computing investment cost which provide the desired results. This is indicated by a decrease in losses and an increase in the loading margin which can eventually improve the security of the operating system or avoid contingency conditions. The type and location of FACTS devices selected in the IEEE 57-bus system is GUPFC on line-9 (buses 9-10) and line-10 (buses 9-11) with parameters (in pu): ��� =