Robust Economic Dispatching of High Renewable Energy Penetrated System with Concentrating Solar Power Providing Reserve Capacity

With the clean transformation of power system, conventional thermal power units can no longer meet the spinning reserve demand due to the mass access of intermittent renewable energy such as wind power and photovoltaic (PV). As a new form of renewable energy generation, concentrating solar power (CSP) has the comparable dispatching performance to conventional thermal power, which has significant advantages in promoting the consumption of renewable energy and participating in system auxiliary services. Therefore, take high renewable energy penetrated system including CSP, wind power, PV and thermal power as the research object. With the goal of reducing operating costs and load shedding costs, a robust economic dispatching model for high renewable energy penetrated system with CSP providing reserve capacity is established, which is on the basis of traditional unit commitment model, considering the constrains including output restriction constraints, ramping ability constraints and thermal energy storage capacity constraints to model the operation of CSP providing reserve capacity. An example of actual data in northwest province of China is calculated in case study, in which the traditional dispatching model of CSP providing reserve capacity is taken as a reference. The results show that the method proposed in this paper can not only improve the economy of system but also reduce the occurrence of load shedding, which is helpful to enhance the reliability of power system.