Multi-strategy photovoltaic microgrid protection method and system

The invention relates to the technical field of power generation of a photovoltaic microgrid, and discloses a multi-strategy photovoltaic microgrid protection method and system. The photovoltaic microgrid protection method comprises the steps of dividing the microgrid into two protection layers, wherein the two protection layers comprise global information-based concentrated protection layer (1) and a single point information quantity-based protection layer (2); and receiving all information acquired by the single point information quantity-based protection layer (2) by the global information-based concentrated protection layer (1), and performing protection after summarization. By the multi-strategy photovoltaic microgrid protection method and system, concentrated and discrete integral protection is achieved, and all information of the microgrid is integrally used. 本发明涉及光伏微电网发电技术领域，公开多策略的光伏微电网保护方法及其系统，该光伏微电网保护方法包括：将微电网划分成两层保护层，两层保护层包括基于全局信息的集中式保护层(1)和基于单点信息量的保护层(2)；基于全局信息的集中式保护层(1)接收到基于单点信息量的保护层(2)所采集的所有信息，并