Assessment of transmission reliability margin using stochastic response surface method

Transmission reliability margin (TRM) is the amount of transmission capability ensuring that the transmission network is secure from the uncertainty in system operating condition. The accurate evaluation of TRM is of great importance in the calculation of available transfer capability (ATC). This paper presents a fast assessment method of TRM using stochastic response surface method (SRSM). The statistics and probability distributions of TRM can be accurately estimated with less computational cost. The effectiveness of the proposed method is demonstrated by several case studies of the modified IEEE 30-bus standard test systems with wind farm integration.