死区效应对串联型电能质量补偿器影响的研究-【新闻】汕尾

死区效应对串联型电能质量补偿器影响的研究

中图分类号： TM762 Research on Influence of Dead-Time Effect on Series Power Quality CompensatorShi Weiwei Liu Yongqiang Dept. of Electronic Engineering, Huaihai Institute of Technology, Lianyungang 222225, China Abstract： In this paper, the influence of dead-time effect on series power quality compensator is analyzed. SPQC injects a voltage, which is equal to the distorted component in supply voltage via series transformer, so the disturbances of the voltages can be cancelled and the waveform of the voltages at load side is sine-shaped, and its amplitude is kept constant ideally. But the open-loop structure of SPQC makes the compensating performance deteriorated by the dead-time effect. Through analysis, the deteriorating degree of dead-time effect on SPQC is given quantificationally. Simulation results show the validity and correctness of all the analysis and conclusions. Key words: series power quality compensator dead-time effect dead-time voltage simulation

2 引 言 现代社会中，电能的使用程度是衡量一个国家发展水平的主要标志之一。随着我国电力事业迅猛发展，人们对电能数量的要求已经逐步得到满足，对电能质量的要求逐步被人们所重视。与此同时，随着科学技术的进步，一方面，各种复杂的、精密的、对电能质量敏感的用电设备大量普及；另一方面，造成电能质量问题的因素不断增加。这样一对矛盾不断突出，也使得有关电能质量的问题日益受到人们的关注。特别是近年来，电网电压中的各种干扰，如电压升高、降落、瞬变、谐波等，带来的经济损失日益严重，因此，各国专家学者开始研究各种电能质量补偿器。其中，串联型电能质量补偿器

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