| 一种基于虚拟同步发电机的多逆变器微电网频率无差调节策略 |
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| 引用本文： | 谢卫才,王世豪,何力,李世军,赵振兴. 一种基于虚拟同步发电机的多逆变器微电网频率无差调节策略[J]. 电力系统保护与控制, 2019, 47(18): 169-175 |
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| 作者姓名： | 谢卫才 王世豪 何力 李世军 赵振兴 |
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| 作者单位： | 湖南工程学院电气信息学院,湖南 湘潭 411101;湖南工程学院,风力发电机组及控制湖南省重点 实验室,湖南 湘潭411101;湖南省风电装备与电能变换协同创新中心,湖南 湘潭 411101;湖南工程学院电气信息学院,湖南 湘潭,411101;湖南工程学院电气信息学院,湖南 湘潭 411101;湖南省风电装备与电能变换协同创新中心,湖南 湘潭 411101 |
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| 基金项目： | 湖南省教育厅科研项目资助(18A348);湖南省自然科学基金项目资助(2019JJ40059);湖南省重点领域研发计划项目资助(2019WK2012) |
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| 摘 要： | 虚拟同步发电机(Virtual Synchronous Generator, VSG)在增强微网稳定性的同时,能克服微网中电力电子装置并网给电网带来的冲击,受到了广泛关注。现有的VSG中的有功频率控制,在微网离网运行时,将存在频率偏移,这将会影响到微网中频率敏感负荷的稳定运行。因此提出了一种VSG的频率无差调节方法,将VSG所产生的频率偏差量叠加到VSG的有功频率控制环中,消除了微网的频率偏移。针对含多个VSG并联运行的微网,各VSG不需要通信,独立参与微网频率无差调节。同时,还能根据VSG额定容量自主分配负荷功率,提高了微电网经济运行的能力。最后搭建三台VSG并联仿真模型,验证了所提控制策略的可行性和有效性。
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| 关 键 词： | 微网 虚拟同步发电机 功率分配 无差调节 |
| 收稿时间： | 2018-10-11 |
| 修稿时间： | 2019-01-21 |
A frequent deviation-free regulation strategy of microgrid based on the VSG of multi-inverter |
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| XIE Weicai,WANG Shihao,HE Li,LI Shijun and ZHAO Zhenxing. A frequent deviation-free regulation strategy of microgrid based on the VSG of multi-inverter[J]. Power System Protection and Control, 2019, 47(18): 169-175 |
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| Authors: | XIE Weicai WANG Shihao HE Li LI Shijun ZHAO Zhenxing |
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| Affiliation: | College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China;Hunan Provincial Key Laboratory of Wind Generator and Its Control, Hunan Institute of Engineering, Xiangtan 411101, China;Hunan Province Cooperative Innovation Center for Wind Power Equipment and Energy Conversion, Xiangtan 411101, China,College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China,College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China;Hunan Province Cooperative Innovation Center for Wind Power Equipment and Energy Conversion, Xiangtan 411101, China,College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China and College of Electrical & Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China |
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| Abstract: | Virtual Synchronous Generator (VSG) has drawn much attention in enhancing the stability of microgrid and overcoming impact of traditional grid-connected electronic devices. In the existing VSG, the active frequency control will result in permanent frequency deviation when the microgrid runs off-grid, which is harmful to the stable operation of the frequency-sensitive load. Therefore, a method of frequent deviation-free regulation is proposed, the frequency deviation generated by the VSG is superimposed to VSG active frequency control loop, eliminating the micro-grid frequency deviation. For microgrids with multiple VSGs operating in parallel, each VSG does not require communication and is independently involved in the microgrid frequency regulation. At the same time, the load power can be automatically allocated to the VSG according to the rated capacity of VSG, conducive to the economic operation of the microgrid. Finally, taking three VSG parallel operation as an example, simulation demonstrates the validity and practicability of this control method. This work is supported by Hunan Provincial Education Department Funded Scientific Research Projects (No. 18A348), Hunan Provincial Self-study Fund Projects (2019JJ40059) and Research and Development Program in Key Areas of Hunan Province (No. 2019WK2012). |
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| Keywords: | microgrid virtual synchronous generator power allocation deviation-free regulation |
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