一种交直流混合微网变换器

发布时间：2018-01-11 21:30

本文关键词：一种交直流混合微网变换器　出处：《电网技术》2017年02期 　论文类型：期刊论文

【摘要】：针对现有交直流混合微电网结构及电网配置模式,提出一种交直流混合微网变换器,该变换器用作交直流混合微网接口,具有结构简单、控制灵活、直流侧多电压等级、功率不平衡范围大且便于可再生能源与储能装置接入等优点。分析了该新型交直流混合微网变换器的工作原理,推导变换器整流级各H桥直流侧电压恒定情况下,各H桥传输的有功功率限制性条件与各H桥直流侧传输功率恒定情况下,系统稳定运行的直流侧电压范围。在以上研究基础上,通过设计仿真与实验验证改变功率限制性条件时,各端口传输功率将大大增加。同时,仿真与实验也验证该微网变换器功率不平衡理论的正确性与其作为交直流微网接口的实用性。
[Abstract]:According to the existing AC / DC hybrid microgrid structure and grid configuration mode, a hybrid AC / DC microgrid converter is proposed, which is used as AC / DC hybrid microgrid interface with simple structure and flexible control. This paper analyzes the working principle of the new AC / DC hybrid microgrid converter, which has the advantages of multi-voltage grade on DC side, wide unbalanced range of power and convenient access to renewable energy and energy storage devices. Under the condition of constant DC voltage of each H bridge in rectifier stage, the limiting conditions of active power transmission of each H bridge and the constant transmission power of each H bridge DC side are deduced. The DC side voltage range of the stable operation of the system. On the basis of the above research, the transmission power of each port will be greatly increased when the power limiting condition is changed by design simulation and experiment. At the same time. Simulation and experiments also verify the correctness of the power imbalance theory of the microgrid converter and its practicability as an AC / DC microgrid interface.
【作者单位】：国家电能变换与控制工程技术研究中心(湖南大学);长沙理工大学电气与信息工程学院;
【基金】：国家自然科学基金项目(51577055)~~
【分类号】：TM46
【正文快照】： 0引言近年来随着分布式新能源的推广与普及,越来越多的分布式新能源接入配电网,由于新能源间歇性与随机性出力的特点[1-4],过多新能源直接接入配电网,对大电网的调控与安全运行可能带来不利影响甚至引发故障[5]。因此,以微网形式将分布式能源接入配电网被普遍认为是解决上述

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