Mitigation Strategy for Duck Curve in High Photovoltaic Penetration Power System Using Concentrating Solar Power Station

Qi Wang, Ping Chang, Runqing Bai, Wenfei Liu, Jianfeng Dai and Yi Tang
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Qi Wang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Ping Chang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Runqing Bai: Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730070, China
Wenfei Liu: Electric Power Research Institute, State Grid Gansu Electric Power Company, Lanzhou 730070, China
Jianfeng Dai: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Yi Tang: School of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2019, vol. 12, issue 18, 1-16

Abstract: Concentrating solar power (CSP) station is counted as a promising flexible power supply when the net load power curve is duck-shaped in high photovoltaic (PV) penetration power system, which may lead to the serious phenomenon of PV curtailment and a large-capacity power shortage. This paper presents a mitigation strategy that replaces thermal power station with CSP station to participate in the optimal operation of power system for solving the duck-shaped net load power curve problem. The proposed strategy utilizes the dispatchability of thermal storage system (TSS) and the fast output regulation of unit in the CSP station. Simultaneously, considering the operation constraints of CSP station and network security constraints of the system, an optimization model is developed to minimize the overall cost including operation and penalty. The results obtained by nonlinear optimization function demonstrate that the replacement of concentrating solar power (CSP) station contributes to reducing the PV curtailment and lost load, while increasing the available equivalent slope for power balance. Thus, the proposed mitigation strategy can promote the penetration of PV generation and improve the flexibility of power system.

Keywords: duck curve; photovoltaic (PV) penetration; concentrating solar power (CSP) station; operation mode; regulation capability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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