A low-voltage micro-grid control method based on standardized information model

Micro-grid is proven to be an effective way to adopt renewable generation in a disperse manner. For information sharing barriers between different inverter manufactory, which are caused by self-definition interfaces of devices, the method of standardized information modeling is proposed, and communication model of low-voltage micro-grid based on IEC61850 is built in this paper. In the unit layer of the model, photovoltaic distributed power is taken as example to show the method. In the model, primary logical devices mainly include PV module, inverter, switching device, etc. secondary logic devices involve schedule, protection, measurement and control, and so on. And then Implementation of 61850 operation control is analyzed, that mainly involve values, functions, and modes. Finally, two typical examples, including P-f droop control, switching between grid-connected and off-grid, were analyzed to illustrate 61850 implementation processes and indicate the feasibility of the 61850 control structure. From the examples, a reasonable engineering implementation of 61850 in micro-grid is shown in this paper.