A PWM static VAr compensator based on phase-shift-controlled multiple-bridge superposition harmonic elimination technique

IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting Pub Date : 1996-10-06 DOI:10.1109/IAS.1996.560240

J. Yanchao, Huang Yongxuan, Liu Zhou, Wu Cheng-qi, Feng Yuguan

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引用次数: 1

Abstract

In this paper, a four-bridge PWM static VAr compensator (FB-PSVC) based on an improved version of the PWM controller is presented in this paper, and a novel phase-shift-controlled multiple-bridge superposition harmonic elimination technique is also proposed. Theoretical analysis shows that the harmonic pairs of [(2k+1)f/sub s//spl plusmn/f] and [(4k+2)f/sub s//spl plusmn/f] generated in each bridge are effectively eliminated through appropriate phase shift control. To satisfy the same total harmonic distortion (THD) requirement (usually under 5%), this new compensator can work at 200 Hz, which is much lower than the previously reported 1.9 kHz of a single-bridge PWM static VAr compensator (SB-PSVC). The efficiency is increased and reliability enhanced. The fairly low switching frequency and multiple bridge structure facilitate its use in high-power VAr compensators since GTOs can be employed as power switch. Theoretical analysis was verified through simulations and experimental results.

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一种基于移相控制多桥叠加谐波消除技术的PWM静态无功补偿器

本文提出了一种基于改进型PWM控制器的四桥PWM静态无功补偿器(bf - psvc)，并提出了一种新的移相控制多桥叠加谐波消除技术。理论分析表明，通过适当的相移控制，可有效消除各电桥产生的[(2k+1)f/sub s//spl plusmn/f]和[(4k+2)f/sub s//spl plusmn/f]谐波对。为了满足相同的总谐波失真(THD)要求(通常低于5%)，这种新的补偿器可以工作在200hz，远低于以前报道的单桥PWM静态无功补偿器(SB-PSVC)的1.9 kHz。提高了效率，提高了可靠性。由于gto可以作为功率开关，其较低的开关频率和多电桥结构便于在大功率无功补偿器中使用。通过仿真和实验结果验证了理论分析的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting

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