VOLTAGE CONTROL METHODS FOR BASSETS AND PHOTOELECTRIC SYSTEMS

Abstract

The invention relates to a method for controlling the busbar voltage of a photovoltaic system. The photovoltaic system comprises a DC / DC converter and an AC / DC converter. The DC / DC converter, the DC / AC converter, and the energy storage battery are connected via a busbar. The DC / DC converter is connected to the photovoltaic DC source and performs maximum power point tracking (MPPT) monitoring on the input power from the photovoltaic DC source. The load is connected to the DC / AC converter with the load power. The energy storage battery has the maximum charging capacity and the maximum discharging capacity. The method involves controlling the busbar voltage within different discrete voltage ranges based on various comparisons between the maximum photovoltaic power and load power, the maximum charging power, and the maximum discharging power.Different voltage intervals correspond to different operating states of the inverter.