Introduction  With the continuously increasing of the installed capacity and proportion of wind power and other new energy sources generation，the peak-shaving problem of receiving power system with nuclear power（such as Guangdong Power Grid） in flood season will be more prominent due to the influence of wind power anti peak shaving characteristics. In order to ensure the coordinated development of multiple types of power supply and the safe and reliable operation of power grid.

  Method  Aiming at the peak shaving problem of the receiving end power system with nuclear power under the wind power grid connection， based on the full analysis of the domestic and foreign nuclear power units' participation in peak shaving and their technical economy， combined with the shortcomings of the conventional deterministic peak shaving check method， a peak shaving balance analysis method combining certainty with probability， typical week / typical day and whole year 8 760 h panoramic simulation was proposed.

  Result  Taking the coastal provincial power grid as an example，the proposed method was applied to analyze the peak-shaving situation of receiving power system under different scenarios， and then some suggestions was presented.

  Conclusion  The proposed method can give full play to the advantages of both deterministic and probabilistic methods and carry out more comprehensive and effective analysis and verification of the system peak regulation balance.