International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
PSO Optimized PID Controller for Interconnected multi-area Power system with and without HVDC link under Open Market System Emad Ali Daood1, A.K. Bhardwaj 2 ¹²(Department of Electrical Engineering, SSET, SHIATS, Allahabad, U.P, India) ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – This work presents Load Frequency Load frequency control (LFC) method is used to Control (LFC) of multi -area interconnected thermal control the frequency of large interconnection of power systems incorporate with reheat turbine. Area power system [9-11]. This provides reliable electric 1, area 2 and area 3 are interconnected using normal power with good quality to consumers. Because HVAC tie line. In this investigation HVDC link is quality and reliability of power is very much connected in parallel with HVAC tie line and important for sensitive loads such as hospitals, performance of AC/DC tie line is compared with processing plants (semiconductor, food, rayon and ordinary HVAC tie line. The dynamic performance of fabrics) and data processing. To produce more the system is observed with conventional PI controller. power, power systems are interconnected. Here Optimal values of proportional and integral controller thermal power plants are interconnected. Generally gain values are tuned using Particle Swarm thermal plants respond to rapidly changing loads Optimization technique. Time domain simulation is without difficulty and this plant, not only produces utilized to study the behavior of system with 1% of electric power, but also generates steam for different step load disturbance given in either area of the industrial purposes. It occupies less space compared system. Finally, simulation result indicates that the to Hydro electric plants. Interconnection of power system with HVDC link yield better controlled response plants provides maximum advantages over in terms of settling time and overshoot individual power plant operation. The interconnection between power systems can highly Key Words: Three area power system, LFC, HVDC improve the continuity, security and integrity of link, PSO, Open Market System,PID power supply, reduce the cost of energy per unit and improves the reliability of supply to the consumers. Due to increased size of power system, the complexity is increased. So the stability of the power I. Introduction system should be maintained. In this paper, stability of the power system is maintained by the Energy is important, which is used in our day to day conventional PI controller. In addition to the HVAC life from ancient days. Different kinds of energies tie line HVDC link is connected in parallel. Due to this used are mechanical, thermal, electrical etc. Out of all parallel HVAC tie line and HVDC link the settling time energies electrical energy is preferred due to various and oscillations are reduced and the system advantages. Because electrical energy can be easily performance is improved [3-6]. transported from one place to another, easily converted into other forms of energy, easily The main objectives of the present work are: controlled and regulated to match requirements and also the losses during transportation is mini-mum. To model the simulink model of three area Due to the advancement in technology the power interconnected thermal power systems with consumption is increasing continuously and power re-heat turbine. demands on the power system are never steady and it varies continuously [9-11]. Change in active power To study the effects of HVDC link parallel affects the system frequency and variation in reactive with HVAC tie line in multi-area thermal power causes the changes in magnitude value of power systems. voltage. Therefore to maintain the steady state operation of power system is necessary to control To optimize the integral and proportional both active and reactive power. controller gains using integral time absolute error technique with and without HVDC link. © 2017, IRJET
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