Joint compensation method, control method and device for grid connection of network construction type energy storage system

The invention discloses a combined compensation method, a control method and a device for grid connection of a network-building type energy storage system. The compensation method comprises the following steps: obtaining an output angular frequency omega of a network-building type energy storage virtual synchronous machine through angular frequency feedforward compensation; angular frequency feed-forward compensation and phase angle feed-forward compensation are combined to obtain an output phase angle theta of the network-forming type energy storage virtual synchronous machine; and generating a driving signal of an inverter bridge switching tube of the network-building type energy storage converter based on the output phase angle theta of the network-building type energy storage virtual synchronous machine. According to the method, the grid-connected active power and frequency response performance of the grid-forming type energy storage virtual synchronous machine are improved through angular frequency feed-