A novel real-time and on-line computation algorithm for characteristic parameters of micro-grids

The characteristic parameters of the micro-grids determine its transient response and the stability. The generation, the grid structure and the electric loads of all the whole micro-grids are always changing randomly due to the random load changes and the integration of large-scale batch energy, indicating that the characteristic parameters of the micro-grids also changes. A novel real-time and on-line computation algorithm for the characteristic parameters of the micro-grids is presented in this paper. This new method can calculate the key characteristic parameters of the micro-grids according to the measured transient currents. And hence the response character and the stability of the transient, the important information for the regulation and dispatching of the micro-grid system, can be pre-estimated quickly and accurately.