Peak Shaving Strategy of Power Grid with Concentrating Solar Power Plant

This paper analyzed the changes of operation characteristics and peak regulation capability about cogeneration unit before and after heating by concentrating solar power(CSP). Discussed the operation mechanism of wind power accommodation by CSP based on cogeneration operation mode. The optimization model of peak shaving is established, which include CSP, wind power, condensing unit and cogeneration unit. Compared with the traditional model, the new model increased the thermal balance constraints of the system, thermoelectric coupling constraints of cogeneration unit, and the operation constraints of CSP. Case study verifies that the proposed model is valid. The CSP plant based on cogeneration operation mode can effectively improve the wind power accommodation level of power grid and avoid the condensing unit frequently adjust its power, which greatly improved the economy of the system.