The invention belongs to the technical field of distributed generating micro-grid systems, and provides an
energy management system for the grid-connected operation of a wind and photovoltaic
power storage micro-
grid system, wherein the micro-
grid system is connected to an alternating-current
bus through a current conversion
system and connected with a large
power grid, and the factory load is also connected to the large
power grid. The wind and photovoltaic
power storage micro-
grid system is composed of at least a
wind driven generator unit, at least a
photovoltaic power generation unit and at least an
energy storage device. The micro-grid
energy management system controls the grid-connected operation of the wind and photovoltaic
power storage micro-grid system, and carries out starting, stopping and
power control on each unit of the wind and photovoltaic power storage micro-grid system, so that each unit of the wind and photovoltaic power storage micro-grid system can run safely and stably, only supplies power to the factory load and does not supply power to the large
power grid. According to the invention, through the
energy management of the wind and photovoltaic power storage micro-grid system, each unit of the wind and photovoltaic power storage micro-grid system can carry out grid-connected operation safely; and when the factory load is changed, the
energy management system carries out starting, stopping and
power control on each unit of the wind and photovoltaic power storage micro-grid system, so that each unit of the wind and photovoltaic power storage micro-grid system can run safely and stably, only supplies power to the factory load and does not supply power to the large power grid.