ISSN: 2277-9655 [Dhundhara* et al., 6(8): August, 2017] Impact Factor: 4.116 IC™ Value: 3.00 CODEN: IJESS7 http: // www.ijesrt.com © International Journal of Engineering Sciences & Research Technology [154] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY TRANSIENT PERFORMANCE ANALYSIS OF CPSS BASED POWER SYSTEM WITH THE PRESENCE ENERGY STORAGE DEVICES Sandeep Dhundhara *1 , Pradeep Kumar 2 , Deepak Lakra 3 * Department of EE, UIET 1 , Chandigarh, DPGITM 2 , Gurgaon, DTC 3 ,Bhadurgarh, India. DOI: 10.5281/zenodo.839153 ABSTRACT This paper analyzed a comparative transient performance of different types of single machine power system connected to infinite bus under the presence of energy storage devices like Superconducting Magnetic Energy Storage (SMES) and Capacitive Energy Storage (CES). For Automatic Generation Control (AGC) loop, thermal unit is considered. The thermal unit is either single or double reheat turbine. PI controller is provided in the AGC loop. The power system AVR loop is provided with Conventional Power System Stabilizer (CPSS), the performances are compared under the presence of SMES and CES units. It is shown that CES based PI controlled AGC loop along with CPSS assists best transient performance of the power system in all cases under different operating conditions. The transient performances are carried out with different load variations. KEYWORDS: Automatic Generation Control (AGC), Automatic Voltage Regulator (AVR), Capacitive Energy Storage (CES), Conventional Power System Stabilizer (CPSS), Superconducting Magnetic Energy Storage (SMES) I. INTRODUCTION In any power system, oscillations may arise due to line Faults, bus bar faults or load changes.so it is desirable feature to achieve better frequency constancy. However, both active and reactive power demands are never steady and they continually change with the rising or falling trend. The Steam input to turbo-generators ( or water input to hydro-generator) must, therefore, be continuously regulated to match the active power demand, failing which the machine speed will vary with consequent change in frequency which may be highly undesirable (maximum permissible change in power frequency is ±0.1%). Also the excitation of generators must be continuously regulated to match the reactive power demand with reactive generation, otherwise the voltages at various system buses may go beyond the prescribed limits. In modern large interconnected systems, manual regulation is not feasible and therefore automatic generation and voltage regulation equipment is installed on each generator. To ensure the quality of the power supply, we need to design a load frequency management system that deals with the management loading of the generator with the frequency. There has been continuing interest in designing strategy for load frequency controls has been proposed since 1970 [1-3]. Concordia and Kirchmayer [4] have studied the AGC of a hydro-thermal system considering non-reheat type thermal system neglecting generation rate constraints. Kothari, Kaul, Nanda [5] have investigated the AGC problem of a hydro-thermal system provided with integral type supplementary controllers. The model uses continuous mode strategy, where both system and controllers are assumed to work in the continuous mode. It is to be appreciated that in a realistic situation, the system works in the continuous mode whereas the controllers work in the discrete mode. Perhaps Nanda, Kothari and Satsangi [6] are the first to present comprehensive analysis of AGC of an interconnected hydrothermal system in continuous-discrete mode with classical controllers. In the interconnected hydro-thermal system used by them, the thermal system uses reheat turbine. and the hydro system uses a mechanical governor. In modern hydro thermal system, reheat type turbine and electric governor [6] are used. Generator excitation controls have been installed and made faster to improve stability. Power system stabilizers have been added to the excitation systems to improve oscillatory instability it is used to provide a supplementary signal to the excitation system. The basic function of the power system stabilizer is to extend the stability limit by modulating generator excitation to provide positive damping torque to power swing modes. A. Chatterjee, S.P.