International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 06 | June 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1809 MULTI AREA FREQUENCY AND TIE LINE POWER FLOW CONTROL WITH TCPS N.S.Deepika 1 , I.Tejaswini 2 , K.Naveen 3 , Dr.J.Ravindra 4 1-4 Dept. of Electrical and Electronics Engineering, Bapatla Engineering College, Andhra Pradesh, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract – In an electric power system, Load Frequency Control (LFC) is a system to maintain reasonably uniform frequency, to divide the load between the generators, and to control the tie line interchange schedules. Analysis of load frequency control models of interconnected power system representation with TCPS is series with tie line provide more detailed information about the system. Interconnected Power systems have advantage to maintain stability, ensure continuity of supply and maintain the frequency to its nominal value. The control of interconnected system is done by Automatic Generation Control which compose of Automatic Voltage Regulator and Load Frequency Control. In this paper PI and FLC and TCPS in two area power system is carried out and results are obtained. MATLAB software was used to carry out the implementation. Keywords: AUTOMATIC GENERATION CONTROL, FUZZY LOGIC CONTROLLER, LOAD FREQUENCY CONTROL, PROPORTIONAL INTEGRAL CONTROLLER, THYRISTOR CONTROL PHASE SHIFTER. 1. INTRODUCTION The system we used is two area interconnected system. In this two areas are connected through a tie line, which allows the flow of electric flow among the interconnected areas. The control unit monitors the system frequency and tie line power derivation and tries to restore the normal operating state of the system during unfavourable conditions such as load perturbations.There is an oscillation in the frequency till the steady state condition is achieved. To damp-out these oscillations TCPS device can be included [4] in the system and the same can meet the sudden change in load. Load Frequency Control (LFC) is a very important issue power system operation and control for supplying sufficient and both good quality and reliable power. [5] As the Samah A. Rahim proposed integral and FLC controllers, the frequency deviation response exhibited a drop in the frequency of both systems for a few seconds before the deviation was recovered to exactly zero error [1]. After introducing FLC to the system, steady state was reached in a less time range and oscillations were eliminated. Yet, the steady state error was not completely eliminated. To increase the performance, we introduce the TCPS to the system. By the TCPS, the settling time is reached in seconds and the system performance is improved. The section 2 deals with methodology of a LFC. Section 3 deals with AGC in single and Multi-area system. Section 4 deals with the implementation of controllers in two area system. Controllers we used are Proportional Integral, Fuzzy Logic Controller and Fuzzy with TCPS and we have explained about construction and rules of FLC. Block Diagrams and Results are also shown. Section 5 deals with conclusion which includes the comparison of the PI, FLC and Fuzzy with TCPS are tabulated and along with references. 2. METHODOLOGY 2.1 Turbine speed governing system When the generator electrical load is suddenly increased, the generated power also increases to satisfy the load demand, which in turns exceeds the mechanical power input. This mechanical power deficiency is supplied by the kinetic energy stored in the rotating system. The reduction in kinetic energy causes the reduction in turbine speed and consequently, the generator frequency falls. The change in speed is sensed by the turbine governor which acts to adjust the turbine input by adjusting valve position to change the mechanical power output to bring the speed to a new steady-state. The earliest governors were the Watt governors which sense the speed by means of rotating fly- balls and provide mechanical motion in response to speed changes. There are some inherent drawbacks and limitations of Watt type governor such as problem of backlash, dead band and other nonlinearities etc. These governors are mechanical type and hence slow in their operation. However, most modern governors use electronic means to sense speed changes and its control. Figure 1 shows schematically the essential elements of a conventional Watt governor which consists of the following major parts: Speed governor: this is heart of the system which senses the change in speed (frequency). As the speed increases the fly balls move outwards and the point B on linkage mechanism moves downwards. The reverse happens when the speed decreases. Linkage Mechanism: These are links for transforming the fly-balls movement to the turbine valve through a