The invention discloses a control system for low voltage ride through. The control system comprises a micro-grid and a first grid-connected inverter device. A first distributed power supply and a second distributed power supply are arranged in the micro-grid, and the micro-grid is used for conveying electricity to a main power grid. The first grid-connected inverter device is mainly used for controlling the first distributed power supply and the second distributed power supply to achieve the low voltage ride through function when the main power grid breaks down. The control system solves the problem of the correlation technique of high cost when the micro-grid connects to achieve the low voltage ride through function.