| 引用本文: | 王瑞琪,程艳,孙树敏,等.基于坐标旋转虚拟阻抗的微电网控制与性能分析[J].电力系统保护与控制,2014,42(12):78-86.[点击复制] |
| WANG Rui-qi,CHENG Yan,SUN Shu-min,et al.Control and performance analysis of microgrid based on coordinate rotational virtual impedance[J].Power System Protection and Control,2014,42(12):78-86[点击复制] |
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| 基于坐标旋转虚拟阻抗的微电网控制与性能分析 |
| 王瑞琪,程艳,孙树敏,靳占新,李宝贤,李超英 |
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| (国网山东省电力公司电力科学研究院，山东 济南 250002;国网山东省电力公司人力资源部，山东 济南 250001;School of Electrical, Computer and Energy Engineering, Arizona State University, USA;国网山东省电力公司德州供电公司，山东 德州 263000) |
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| 摘要: |
| 微电网中系统阻抗不平衡和复阻抗特性、电源和负载位置复杂性等因素严重影响了系统功率分配的准确性、稳定性和动态性能。提出了基于坐标旋转虚拟阻抗的孤岛微电网控制策略，采用坐标旋转虚拟阻抗闭环改善微电网的阻抗特性，基于电压幅值和频率下垂控制实现系统功率分配，带前馈补偿的电压外环控制和电流内环控制保证了系统的稳态和暂态性能。建立了完整的微电网小信号动态模型，并在此基础上分析了坐标旋转虚拟阻抗对整个微电网性能的影响。算例仿真验证了小信号动态建模分析的准确性，证明了该方法能够改进功率解耦和分配的准确性，提高微电网控制的稳定性和动态性能。 |
| 关键词: 微电网 虚拟阻抗 小信号模型 坐标旋转 下垂控制 |
| DOI：10.7667/j.issn.1674-3415.2014.12.013 |
| 投稿时间：2013-09-08修订日期：2013-12-09 |
| 基金项目:国家高技术研究发展计划(863计划) (2012AA050206)；国家电网公司科技项目(12-12) |
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| Control and performance analysis of microgrid based on coordinate rotational virtual impedance |
| WANG Rui-qi,CHENG Yan,SUN Shu-min,JIN Zhan-xin,LI Bao-xian,LI Chao-ying |
| (Shandong Electric Power Research Institute of State Grid, Jinan 250002, China;Shandong Electric Company Human Resources Department of State Grid, Jinan 250001, China;School of Electrical, Computer and Energy Engineering, Arizona State University, USA;Dezhou Electric Company of State Grid, Dezhou 263000, China) |
| Abstract: |
| The power-sharing accuracy, system stability and transient performance can be seriously influenced by the unbalanced complex impedance, the complicated location of power generations and loads in microgrid. The control strategy of autonomous microgrid based on coordinate rotational virtual impedance is proposed to handle this problem. The coordinate rotational virtual impedance loop is adopted to improve the impedance characteristic. The system power-sharing is implemented by voltage magnitude and frequency based droop control strategy. The system stability and transient performance is ensured by the outer voltage control loop and inner current control loop with feed-forward compensation. In order to analyze the effect of coordinate rotational virtual impedance on the performance of microgrid, the small-signal dynamic model of whole microgrid is built. The simulation results verify the accuracy of small-signal dynamic modeling and analysis, confirming that the proposed control strategy can improve the active and reactive power decoupling, the power sharing accuracy, and the system stability and transient performance. |
| Key words: microgrid virtual impedance small-signal model coordinate rotation droop control |
