Steady security risk assessment considering uncertainties of wind power and fault in smart grid

The uncertainties and intermittent nature of the wind generation poses certain operational challengers for the transmission grid including traditional energy generation. This paper presents a new viewpoint that the steady security risk assessment should consider uncertainties of wind power, correlation between random variables and fault contingency from periodic planning and real time operation. In this paper, probability models describing uncertainties of generation, loads and short-term wind power are built. Then, probabilistic load flow using Monte Carlo simulation is employed to calculate the risk indices that guide operators make optimal operation decisions. The IEEE three areas RTS-96 test system has been taken for case study. The case has shown that the method is effective and efficient.