与传统以同步发电机为发电主体的发电系统不同，微网内存在多种类型的分布式电源(distributed generation，DG)，为便于控制和管理如此复杂的系统则需要采用分层控制，分层控制分为微电网初级控制、二级控制、三级控制。以光伏发电这一种DG为例，在初级控制层面根据其特性优化了光伏电源最大功率点跟踪(maximum power point tracking，MPPT)的方法，将增量电导法中融入了基于模糊控制的PI控制器，使其具有更好的实时性和计算速度，并且能及时根据环境变化改变其输出功率，具有良好的适应性。
Different from the traditional generation system with synchronous generators as the main generator, there are many types of distributed generators (DG) in the microgrid. In order to facilitate the control and management of such a complex system, hierarchical control is needed, which is divided into primary control, secondary control and tertiary control. Taking photovoltaic power generation as an example, this paper optimizes the method of maximum power point tracking (MPPT) of photovoltaic power supply according to its characteristics at the primary control level. The incremental conductance method is integrated into the PI controller based on fuzzy control, so that it has better real-time performance and calculation speed, and can change its output power in time according to environmental changes. It has good adaptability.
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