引用本文: | 袁敞,丛诗学,徐衍会.应用于微电网的并网逆变器虚拟阻抗控制技术综述[J].电力系统保护与控制,2017,45(9):144-154.[点击复制] |
YUAN Chang,CONG Shixue,XU Yanhui.Overview on grid-connected inverter virtual impedance technology for microgrid[J].Power System Protection and Control,2017,45(9):144-154[点击复制] |
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摘要: |
微电网是由分布式电源、储能装置和负荷等组成的统一整体,随着分布式电源渗透率的不断提高,微电网的应用越发广泛。在实际运行中,微电网中通常会出现并联逆变器功率分配不均、谐波污染、串并联谐振、故障电流和励磁涌流过大等问题。虚拟阻抗技术能够改变并网逆变器的阻抗特性,对于上述问题的解决效果颇佳,而且实现简单,因此具有广泛的应用前景。全面综述了虚拟阻抗的应用场景和相应的实现方法,并结合自适应虚拟阻抗这一现阶段的研究热点,探讨了未来的研究趋势和可能遇到的关键问题。 |
关键词: 虚拟阻抗 下垂控制优化 谐波补偿 谐振抑制 故障电流限制 励磁涌流抑制 |
DOI:10.7667/PSPC160624 |
投稿时间:2016-05-01修订日期:2016-12-13 |
基金项目:国家自然科学基金项目(51677066) |
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Overview on grid-connected inverter virtual impedance technology for microgrid |
YUAN Chang,CONG Shixue,XU Yanhui |
(State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University, Beijing 102206, China) |
Abstract: |
Microgrid is a unity composed of distributed generation, energy storing devices and load. As the penetration of distributed generation increasing, microgrid application domain is more extensive. Some problems often occur in microgrid, such as parallel inverter power distribution imbalance, harmonic pollution, series parallel resonance, fault current and inrush current. Virtual impedance technology which is achieved easily can change the impedance characteristics of grid-connected inverters and solve the above problems effectively, hence this technology has broad application prospects. This paper comprehensively introduces the application scenarios of virtual impedance and corresponding implementation methods, combined with adaptive virtual impedance that is the current hot research topics, and discusses the future research trends and key issues that may be encountered. This work is supported by National Natural Science Foundation of China (No. 51677066). |
Key words: virtual impedance droop control optimizing harmonic suppression resonance damping fault current limiting inrush current suppression |