Grid-connected inverter direct power control method with voltage compensation

The invention discloses a grid-connected inverter direct power control method with voltage compensation. According to the method, in combination with a state observer, the defects that parameter changes of the characteristic matrix of a traditional state observer are not considered, and influences on an observation result by the input deviation of the traditional state observer are not considered are overcome. A state observer based on an inner model is adopted for obtaining an accurate observation state quantity, a controlled object is transformed through state feedback, and then the network access current of a grid-connected inverter is controlled; meanwhile, by the adoption of the direct power control method, network side power can be controlled in real time; on the premise that the cost is not increased, the fluctuation magnitude of bus capacitor voltage is decreased, and circuit stability is improved.