전시 시설에서 LED의 고조파 발생 및 대책에 관한 다학제적 연구

Currently, LED lamp is replacing conventional lighting lamp due to several advantages such as higher efficiency, longer lifetime, and eco-environ mental effect. Moreover, LED can bring significant demonstrative effects when fused technology with IT technology. LED is also drawing attention for its emotional effectiveness in exhibition area such as museum and art gallery that rapidly increasing its application to promote ideal and pleasant environment to galleries. However, LED lighting have several technical issues such as flickering, dissipation of high temperature and signal distortion caused by harmonics. In particular, such a distortion of signals and electric power may cause undesirable effects to other peripherals such as malfunction of circuit breaker (or earth leakage breaker) and specially, fire in exhibition sites by overheated components with excessive power amplified by harmonics. In this study, we analyzed the harmonics generated from LED lamps and compared its amount with conventional fluorescent lamp and metal halide lamp. The comparison is between 17.3 W household LED lamp and 100 W LED lamp which are mainly used in exhibition hall. Also we analyzed the amount of harmonic generated when a number of LED connected and experimentally analyzed the influence to earth leakage breaker. The results of the study are as follows. Through these studies, we have proposed several methods to reduce harmonic and to minimize the effects of harmonic.