보조 컨버터를 이용한 HVDC 시스템의 특성개선

Performance Improvement using Auxiliary Converter on HVDC System

  • 발행 : 2009.02.01

초록

This paper presents a new AC/DC converter scheme for HVDC system to achieve a high power factor operation. The new AC/DC converter consists of two 12-pulse bridge converters in series: the primary and auxiliary converters. Ignition angles of the main and auxiliary converters are controlled independently to maintain the nominal DC voltage and control auxiliary voltage. The resulted DC voltage obtained by superimposing the above two phase modulated voltages can be controlled very rapidly over a wide range, and a high power factor operation is achieved. Performance improvements in power factor and harmonic distortion are validated by theoretic derivations and experiments with prototype HVDC system. With the proposed converters, investment for reactive power compensation and filter in HVDC system can be saved significantly.

키워드

참고문헌

  1. P. Kundur, 'High-Voltage Direct-Current Transmission', chapter 10
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  7. PSIM: PSIM${\circledR}$ is a simulation software specifically designed for power electronics and motor control