ANALYSIS OF SINGLE SWITCH QUADRATIC BUCK CONVERTER

FABRICATION OF TWELVE PULSE CONVERTER

FABRICATION OF TWELVE PULSE CONVERTER

BY K.SOWMYA [11071A0221] K.VARSHA [11071A0225] P.RAVALI [11071A0239] U.SATISH [11071A0252] UNDER THE GUIDANCE OF MRS. CH. MANJEERA [ASSISTANT PROFESSOR] DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING VNR VIGNANA JYOTHI INSTITUTE OF ENGINEERING AND TECHNOLOGY

BACK GROUND

Recently, HVDC is used as an alternative to AC for transmitting electrical energy over long distances. An HVDC transmission requires electric power to convert from high voltage alternating current (AC) to high-voltage direct current (HVDC), or vice-versa. Most of the HVDC systems in operation today are based on line-commutated converters (LCC).For long-distance transmission, HVDC systems may be less expensive and suffer lower electrical losses.

Why HVDC?

Its an interesting question, because most electrical power transmissions also use three-phase alternating current. So how does DC transmission fit into a modern power network?

High-voltage AC transmission has some limitations Starting with transmission capacity and distance constraints The impossibility of directly connecting two AC power networks of different frequencies.

High-voltage DC transmission providesStable transmissionControl capabilityThis operation can be performed by TWELVE PULSE CONVERTER with low harmonics

CIRCUIT DIAGRAM

WAVEFORMS OF 12 PULSE CONVERTER USING THYRISTORS

REFERENCESEconomic Assessment of HVDC Links, CIGRE Brochure Nr.186 (Final Report of WG 14-20) Power electronics: converters, applications, and design By Ned Mohan, Tore M. Undeland.

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