摘要：This work deals with power quality improvement by using TCTC and STATCOM. When the reactive power of the load is changing continuously, a suitable fast response compensator is needed. STATCOM, TCTC, UPFC, TCSC, SSSC, IPFC and SVC are the compensators belonging to FACTS devices. STATCOM (Static Compensator) and TCTC (Thyristor controlled tap changer) are two such compensators belonging to FACTS devices. They are used in this work. Here the Tap changer has been designed specially to improve the voltage level. Smooth reactive power control is achieved by varying the firing angle of TCTC system. In this bus system, STATCOM using five level inverter VSI circuit is introduced. The VSI is extremely fast in response to reactive power change. A Static Compensator (STATCOM) is a device that can provide reactive support to a bus. It consists of voltage source inverters connected to an energy storage device on one side and to the power system on the other side. STATCOM is a device which can supply the required reactive power at low values of bus voltage and can also absorb active power if it has large energy storage. It also produces less harmonic content in the output and higher compensation VA capacity. Models for the STATCOM &TCTC (Thyristor tap changer) are developed using MATLAB simulink. The simulation results of thirty bus system with STATCOM & TCTC are presented. MATLAB codes are utilized for the implementation of the two FACTS devices in the Newton – Raphson algorithm. Power flow control is evaluated for thirty bus system.
