Forced shutdown of communication base station inverter and grid connection

Conversely, during the transition from islanded to grid-connected mode, this paper proposes a composite pre-synchronization control strategy based on droop control, which enables precise tracking of the phase, amplitude, and frequency of the output voltage of the bidirectional energy storage inverter relative to the grid voltage.

Currently, there are two primary switching strategies for bidirectional energy storage converters: one is the switching strategy combining PQ control and V/f control, and the other is the switching strategy based on droop control [3, 4, 5, 6].

We propose a passivity-based control strategy to enhance the stability and dynamic performance of grid-forming multi-inverter power stations and address these challenges. The inner loop designed from the perspective of energy reshaping, ensures the stability of the inverter's output.

A grid connection/disconnection mode switching strategy for the multi-droop controlled inverter has been proposed in . However, the analysis on the issue of the power circumfluence during the pre-synchronous period is not provided.

This work provides a feasible solution for enhancing inverter stability in power stations, contributing to the reliable integration of renewable energy. Existing grid-connected inverters encounter stability issues when facing nonlinear changes in the grid, and current solutions struggle to manage complex grid environments effectively.

The bidirectional energy storage converter in the power grid must possess the capability for seamless switching between grid-connected and islanding modes to cope with frequency and voltage dips resulting from unforeseen circumstances in the main grid.