输入源的间歇性和多样性，恒功率、脉冲型负载的特殊性，造成微电网阻抗的时变特质，影响逆变器的并网稳定性和控制性能，给基于固定电网阻抗模型的传统逆变器控制带来挑战，亟待开展智能型自适应控制方案的研究，对提升微电网整体的可靠性和电能质量具有重要意义。项目开展：①对逆变器底层控制器的研究，通过综合优化控制器的结构和调节器，解决逆变器自身控制性能欠佳的问题；②对逆变器自适应控制的研究，提出基于性能指标闭环的新型自适应控制方案，解决电网阻抗变化造成逆变器并网稳定性变弱和控制性能下滑的问题；③对自适应调节器干扰机理的研究，提出频率自同步的抗干扰方案，解决扰动信号干扰导致的多逆变器同步自适应控制难以实现的问题。该项目旨在突破传统自适应控制依赖于电网阻抗建模/在线测量的局限性，实现任意合理的电网阻抗范围内，微电网中全体逆变器的稳定并网与高性能控制，推动新能源的发展，加速传统电网的低碳化、信息化、智能化。

The intermittency and diversity of sources together with the particularity of constant-power/pulsed loads, result in time-varying characteristics of microgrid impedances, which affects the stability of grid/inverter connection and inverter’s control performance. The peculiarity of microgrid impedances brings in challenges to conventional inverter control, which is based on fixed grid impedance models, making study of the more intelligent adaptive control schemes an imperative and urgent task. The adaptive control is expected to significantly improve the overall reliability and power quality of microgrids. To this end, the project will conduct a series of research: ①On the bottom-controller, by comprehensively optimizing the controller structure and the regulator to improve its control performance; ②On adaptive control strategies to improve the stability of grid/inverter connection and maintain the high inverter control performance, by proposing a novel performance-indexes-based adaptive control scheme; ③On the interference among adaptive controllers to realize simultaneously the adaptive control of multiple inverters by proposing a frequency self-synchronized harmonics attenuation strategy. The project aims to overcome the limitation of conventional adaptive control, which requires grid impedance modeling or online measurement. The joint realization of stable grid/inverter connection and high-performance control of all inverters within microgrids under any reasonable grid impedances, will speedup the development of renewables and accelerate the low-carbonization, informatization, and intelligentization of conventional grids.