Grid reactive power compensation: provide reactive power support in response to grid dispatching AVC instruction; Improve the power factor: This product can realize reactive power compensation and improve the power factor by monitoring the power factor at the assessment point and following the principle that capacitive reactive power and inductive reactive power offset each other; Stabilizing grid voltage: This product can stabilize the grid voltage by monitoring the grid voltage, the voltage of capacitive output raising system voltage and inductive output lowering system, and other methods; Harmonic suppression: This product can realize the harmonic suppression by monitoring the load current, extracting the harmonic components of the load current, and controlling SVG to output harmonic currents with equal magnitude and opposite direction to be injected into the grid; Three-phase unbalance compensation: This product can realize the three-phase unbalance compensation by monitoring the load current, decomposing the load current into a positive sequence component and a negative sequence component by using a symmetrical component method, and controlling the SVG to output negative sequence currents with equal magnitude and opposite directions to be injected into the grid; Voltage fluctuation and flicker control: This product can realize voltage fluctuation and flicker control by monitoring the grid voltage fluctuation and responding to reactive power support quickly at 5ms.