Mitigation of Total Harmonics Distortion by Using 84 Pulse VSC Configurations
P. Sreenath1, Myaka.Narendhar2, Tadikamalla. Sanjeev Rao3
1P. Sreenath, Electrical and Electronics, Jntuh, Hyderabad, India.
2Myaka. Narendhar,  Electrical and Electronics, Jntuh, Hyderabad, India.
3Tadikamalla. Sanjeev Rao, Electrical and Electronics, Jntu Anantapur, India.
Manuscript received on September 24, 2013. | Revised Manuscript received on October 16, 2013. | Manuscript published on October 30, 2013. | PP: 168-170  | Volume-3, Issue-1, October 2013. | Retrieval Number:  A2201103113/2013©BEIESP

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Abstract: This paper analyzes the 84 pulse VSC (Voltage source converter) and static synchronous compensators (STATCOMs) utilize multipulse converters due to the following: 1) lower harmonic injection into the power system and FACTAS; 2) decreased stress on the electronic components due to decreased voltages; and 3) lower switching losses. This paper approach is illustrated on an 84 pulse VSC and the effect on the dynamic performance and the total harmonic distortion (THD) is analyzed.84 pulse VSC assembled by combining one twelve-pulse VSC, in conjunction with an asymmetric single phase seven level converter plus an injection transformer. With this arrangement, The VSC output’s THD in voltage is reduced. The proposed strategy allows savings in the number of employed switches. Simulation and experimental results are provided to show the proposal appropriateness.
Keywords: FACT Devices,  Multipulse converters, Voltage source converters, STATCOM, IGBT Switches and custom power.