Application of on-line static sensitivity analysis software in China Southern power Grid

Online static sensitivity analysis is one of the important constituent component in advanced application software for energy management system (EMS). To carry out online static sensitivity analysis in the EMS of dispatching center of China Southern power Grid (CSG), it is needed to make calculation of the full model of 500 kV/220 kV AC/DC hybrid power gird covering five provinces and districts, so it is necessary to consider various physical responses of generators in these provinces and districts and the interaction between AC and DC power networks, in addition, the good covergence of the calculation is to be ensured. To meet above-mentioned demands, the sensitivity algorithm for AC/DC hybrid power grid, in which the characteristics of PV and PQ nodes is taken into account, is adopted. The algorithm that considers quasi-steady physical response characteristics of generators can give sensitivity among AC components and that among AC and DC components. The presented online static sensitivity analysis software has been steadily and efficiently operated in the EMS of dispatching center of CSG more than three years, and operation experiences of this software show that it is practicable for scheduling and control of dispatching center.