柔性直流配电网纹波形成机理与叠加特性
发布时间：2018-08-12 18:43
【摘要】：直流配电网是未来配电系统发展的新趋势,其电能质量问题是需要关注的重要问题之一。其中纹波的影响因素多、涉及面广,是一种常见的直流电能质量问题。结合直流配电网的拓扑结构、变流器交流侧的特性,分析由于交流负荷非理想特性及交流电源不理想因素而引起的直流纹波形成机理。在此基础上,对交流接入端三相对称和不对称情况下正序谐波、负序谐波及零序谐波在直流侧产生的纹波及相互间的叠加情况进行频域分析,建立了纹波叠加特性与交流谐波次数和相位的关系。仿真结果验证了理论分析的正确性。
[Abstract]:DC distribution network is a new trend of distribution system in the future, and its power quality is one of the important problems to be paid attention to. The ripple is a kind of common DC power quality problem because of its many influencing factors and a wide range of aspects. Combined with the topology of DC distribution network and the characteristics of AC side of converter, the formation mechanism of DC ripple caused by non-ideal characteristics of AC load and imperfect factor of AC power supply is analyzed. On this basis, the frequency domain analysis of the ripple and the superposition of the positive harmonic, the negative sequence harmonic and the zero sequence harmonic on the DC side under the condition of three phase symmetry and asymmetry at the AC access terminal is carried out. The relationship between the characteristics of ripple superposition and the frequency and phase of AC harmonics is established. The simulation results verify the correctness of the theoretical analysis.
【作者单位】： 电力电子节能与传动控制河北省重点实验室(燕山大学);
【基金】：国家自然科学基金项目(51477147) 河北省教育厅资助科研项目(QN2015124)~~
【分类号】：TM721.1
，
本文编号：2179958
[Abstract]:DC distribution network is a new trend of distribution system in the future, and its power quality is one of the important problems to be paid attention to. The ripple is a kind of common DC power quality problem because of its many influencing factors and a wide range of aspects. Combined with the topology of DC distribution network and the characteristics of AC side of converter, the formation mechanism of DC ripple caused by non-ideal characteristics of AC load and imperfect factor of AC power supply is analyzed. On this basis, the frequency domain analysis of the ripple and the superposition of the positive harmonic, the negative sequence harmonic and the zero sequence harmonic on the DC side under the condition of three phase symmetry and asymmetry at the AC access terminal is carried out. The relationship between the characteristics of ripple superposition and the frequency and phase of AC harmonics is established. The simulation results verify the correctness of the theoretical analysis.
【作者单位】： 电力电子节能与传动控制河北省重点实验室(燕山大学);
【基金】：国家自然科学基金项目(51477147) 河北省教育厅资助科研项目(QN2015124)~~
【分类号】：TM721.1
，
本文编号：2179958
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