基于开关电容的三相单开关反激式高增益AC-DC整流变换器

发布时间：2018-01-15 08:02

本文关键词：基于开关电容的三相单开关反激式高增益AC-DC整流变换器　出处：《电工技术学报》2014年S1期 　论文类型：期刊论文

【摘要】：提出一种适用于小型分布式风力发电系统的基于开关电容的三相反激式高增益整流变换器。在传统三相单开关电路交流输入侧引入带开关电容的倍压单元,本文所提出的变换器可以实现高电压增益,且该增益随输入电压的升高而降低,使得电路不仅具有较好的低输入电压工作特性,且有效拓宽了变换器的输入电压工作范围。电路工作在电感电流断续(DCM)模式下,从而可实现稳态时的输入电流功率因数校正(PFC)功能。此外,电路未采用电解电容,可实现极低输入电压下微弱能量的收集,有效提高小风机系统的风能利用率。为了验证该拓扑及理论分析的正确性,设计了一台额定功率300W的样机,额定条件下变换效率可以达到85%,输入电流的总谐波失真(THD)小于10%。
[Abstract]:For a small distributed wind power system of three-phase switched capacitor flyback rectifier converter based on high gain. In the traditional three-phase single switch AC input circuit switched capacitor with the double voltage unit, the proposed converter can achieve high voltage gain and the gain decreases with increasing input voltage, low input voltage makes the circuit not only has good working characteristics, and effectively broaden the input voltage range of the converter. The circuit operates in discontinuous current mode (DCM), which can realize the steady state input current power factor correction (PFC) function. In addition, the circuit is not using electrolytic capacitor can to achieve very low input voltage to collect the weak energy, effectively improve the utilization rate of wind wind machine system. In order to verify the correctness of the topology analysis and theory, design a rated power of 300W The conversion efficiency of the prototype can reach 85% under the rated condition, and the total harmonic distortion (THD) of the input current is less than 10%.

【作者单位】：天津大学智能电网教育部重点实验室;
【基金】：国家自然科学基金资助项目(51307117,51207104) 天津市科技支撑计划重点资助项目(14ZCZDGX00035)
【分类号】：TM46
【正文快照】： 1引言小型风力发电因其灵活性高、成本低廉等特点而具有广泛的研究与应用价值。但由于小型风力发电系统所在风场存在平均风速偏低,波动较大等问题,现有风机能量变换装置无法在较低输入电压下获得足够高的电压增益,导致目前大部分小型风力发电系统无法正常并网发电。目前,已有

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