| Summary: | In view of the development trend of nuclear power and offshore wind power in China's coastal areas, as well as the current situation of peak shaving pressure brought by reverse peak shaving of wind power to the power grid. In this paper, according to the number of failures and power loss per year in each region, the risk of peak load regulation is calculated comprehensively and quantitatively, and the risk cost increment of nuclear power peak shaving is calculated and evaluated. Optimize and linearize the constraints, and the relatively complete constraint conditions are established. Thus, the traditional peak shaving model of fixed gear nuclear power dispatch is improved, and the peak shaving depth is continuous within the safety regulation range of nuclear power. Then, based on the peak shaving operation model of nuclear power safety constraints, considering the nuclear power risk and wind power consumption, taking into account the operation cost, risk cost, environmental cost and safe operation constraints of various types of power supply, a multi-source optimal scheduling model of wind-nuclear-thermal-storage-gas is established. Based on the calculation example of the actual regional power grid, the security, low carbon and economy of the model are analyzed, and the sensitivity analysis of the risk cost coefficient and wind power reserve coefficient in the dispatching model is carried out. It can be concluded that the nuclear power has a little safety impact on the reactor core and coolant circulation system after participating in the peak shaving operation, and the increase in the probability of man-made misoperation is not obvious. The main source of the risk cost increase is the benefit loss of selling electricity, so that it can properly participate in the peak shaving of the system. When the nuclear safety risk is low and the risk of wind abandonment is high, the nuclear power peak shaving has a stronger economic advantage. The dynamic optimal allocation of wind power reserve capacity can further reduce the abandonment of nuclear power and improve the operation economy of the system.
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