Novel Approach for Reducing THD in Distribution System by Using DSTATCOM
|International Journal of Electrical and Electronics Engineering|
|© 2016 by SSRG - IJEEE Journal|
|Volume 3 Issue 4|
|Year of Publication : 2016|
|Authors : P.Suresh Babu, B.Purushotham|
P.Suresh Babu, B.Purushotham, "Novel Approach for Reducing THD in Distribution System by Using DSTATCOM" SSRG International Journal of Electrical and Electronics Engineering 3.4 (2016): 21-26.
P.Suresh Babu, B.Purushotham,(2016). Novel Approach for Reducing THD in Distribution System by Using DSTATCOM. SSRG International Journal of Electrical and Electronics Engineering 3(4), 21-26..
This paper concentrated on the power quality improvement in distributed networks with utilizing FACTS technology. In the suggested paper implemented a new algorithm with the reference voltage are generated by presenting the distributed static compensator (DSTATCOM) under voltage control operation. The developing model which is maintained the unity power factor is generated under abnormal conditions, it is not possible by utilizing conventional topologies. Also maintained active and reactive powers effectively and the harmonic analysis is provided to improve the performance by identifying the THD distortion levels. Whenever the presence of voltage sags in the distribution regions in that situation DSTATCOM can identified the problems and those problems are compensated with the high rating capabilities from the STATCOM. Whenever the abnormal conditions occurred in the systems such conditions the presence of ripple contents very high in load side. But by the STATCOM we can reduce the harmonic levels effectively b controlling the voltage references in the voltage source converter effectively which can improves the behaviour of distributed side. The state space model is developed by DSTATCOM with hysteresis controller. The hysteresis controller is activated with the help of dead beat controller under the abnormal load conditions. The Simulink models are tested and verified within the MATLAB/SIMULINK. Finally as a result power quality issues were compensated, improves power factor levels, active and reactive power also compensated, THD levels also minimized load requirements are achieved properly by the utilization of DTSTATCOM.
 M. Bollen, Understanding Power Quality Problems. Piscataway, NJ, USA: IEEE, 2000, ch. 1, pp. 1–35.
 A. Ghosh and G. Ledwich, “Load compensating DSTATCOM in weak ac systems,” IEEE Trans. Power Del., vol. 18, no. 4, pp. 1302– 1309, Oct. 2003.
 A. Elnady and M. Salama, “Unified approach for mitigating voltage sag and voltage flicker using the DSTATCOM,” IEEE Trans. PowerDel., vol. 20, no. 2, pt. 1, pp. 992– 1000, Apr. 2005.
 S.-H. Ko, S. Lee, H. Dehbonei, and C. Nayar, “Application of voltageandcurrent-controlled voltage source inverters for distributed generation systems,” IEEE Trans. Energy Convers., vol. 21, no. 3, pp. 782–792, Sep. 2006.
 P. Mitra and G. Venayagamoorthy, “An adaptive control strategy for DSTATCOM applications in an electric ship power system,” IEEETrans. Power Electron., vol. 25, no. 1, pp. 95–104, Jan. 2010.
 M. Moradlou and H. Karshenas, “Design strategy for optimum rating selection of interline DVR,” IEEE Trans. Power Del., vol.26, no.1, pp. 242–249, Jan.2001.
 J. Rodriguez, J. Pontt, C. A. Silva, P. Correa, P. Lezana, P. Cortes, and U. Ammann, “Predictive current control of a voltage source inverter,” IEEE Trans. Ind. Electron., vol. 54, no. 1, pp. 495–503, Feb. 2007.
 M. K. Mishra, A. Ghosh, A. Joshi, and H. M. Suryawanshi, “A novel method of load compensation under unbalanced and distorted voltages,” IEEE Trans. Power Del., vol. 22, no. 1, pp. 288–295, Jan. 2007.
 B. Singh, P. Jayaprakash, T. Somayajulu, and D. Kothari, “Reduced rating VSC with a zig-zag transformer for current compensation in a three-phase four-wire distribution system,” IEEE Trans. Power Del., vol. 24, no. 1, pp. 249–259, Jan. 2009.
 S. Rahmani, A. Hamadi, and K. Al-Haddad, “A Lyapunovfunctionbased control for a three-phase shunt hybrid active filter,” IEEE Trans.Ind. Electron., vol. 59, no. 3, pp. 1418–1429, Mar. 2012.
M. K. Mishra and K. Karthikeyan, “A fast-acting dc-link voltage controller for three-phase DSTATCOM to compensate ac and dc loads,” IEEE Trans. Power Del., vol. 24, no. 4, pp. 2291–2299, Oct. 2009.
 M. K.Mishra, A. Ghosh, and A. Joshi, “Operation of a DSTATCOM in voltage control mode,” IEEE Trans. Power Del., vol. 18, no. 1, pp. 258–264, Jan. 2003.
 A. Jain, K. Joshi, A. Behal, and N. Mohan, “Voltage regulation with STATCOMs:Modeling, control and results,” IEEE Trans. Power Del., vol. 21, no. 2, pp. 726–735, Apr. 2006.
 R. Gupta, A. Ghosh, and A. Joshi, “Switching characterization of cascaded multilevel-inverter-controlled systems,” IEEE Trans. Ind. Electron., vol. 55, no. 3, pp. 1047–1058, Mar. 2008.
 A. Yazdani, M. Crow, and J. Guo, “An improved nonlinear STATCOM control for electric arc furnace voltage flicker mitigation,” IEEE Trans.Power Del., vol. 24, no. 4, pp. 2284–2290, Oct. 2009.
 H. Fujita and H. Akagi, “Voltage-regulation performance of a shunt active filter intended for installation on a power distribution system,” IEEE Trans. Power Electron., vol. 22, no. 3, pp. 1046–1053, May 2007.
The state space model is developed by DSTATCOM with hysteresis controller.