| 一种级联电力电子变压器直流电压平衡控制策略 |
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| 引用本文： | 李响,郝瑞祥,游小杰,王剑,黄佳佳,龚泽宇.一种级联电力电子变压器直流电压平衡控制策略[J].电工技术学报,2017,32(2). |
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| 作者姓名： | 李响 郝瑞祥 游小杰 王剑 黄佳佳 龚泽宇 |
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| 作者单位： | 北京交通大学电气工程学院 北京 100044 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 基于功率反馈的双闭环功率均衡策略是级联型电力电子变压器隔离级DC-DC变换环节的一种典型控制策略。该策略优点之一是控制过程中明确了变换器传递功率指令这一变量,可以通过对其作处理来调节隔离级传递功率,进而实现多种功能。基于此提出一种改进的整流电压平衡控制策略,在DC-DC变换器各级单元功率指令上引入相应前级整流电压偏差补偿量,通过调节隔离级各单元功率分配以自动实现整流侧直流电压平衡。最后通过仿真与实验验证了这种功率指令补偿式电压平衡策略的有效性。
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| 关 键 词： | 级联型电力电子变压器 功率指令补偿 功率匹配 电压平衡 |
A DC Voltage Balance Control Strategy for the Cascaded Power Electronic Transformer |
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| Li Xiang,Hao Ruixiang,You Xiaojie,Wang Jian,Huang Jiajia,Gong Zeyu.A DC Voltage Balance Control Strategy for the Cascaded Power Electronic Transformer[J].Transactions of China Electrotechnical Society,2017,32(2). |
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| Authors: | Li Xiang Hao Ruixiang You Xiaojie Wang Jian Huang Jiajia Gong Zeyu |
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| Abstract: | A traditional control strategy for DC-DC converters of cascaded power electronic transformer is double closed-loop control based on real-time power feedback.One of its advantages is that the strategy brings out the power reference and makes it possible to achieve more functions through regulating the transmission power.On this basis,a novel DC voltage balance control strategy is proposed in this paper.DC voltage deviation of the input cell is added onto the power reference of relevant cell,and power allocation can be adjusted to better realize DC voltage balance automatically.Finally,simulation and experimental results verify the proposed feedforward control strategy. |
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| Keywords: | Cascaded power electronic transformer power reference compensation power matching voltage balance |
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