Volume 66

Optimization Scheduling Method for Enhancing Flexibility in Cascade Hydro-Wind-Solar Power System Utilizing Hybrid Pumped Storage Zhewen Hu1, Yunchao Sun, Wei Hu, Yipu Li, Zhen Gao, Lei Zhang

Abstract

To fully explore the potential of hybrid pumped storage in enhancing the power supply flexibility of the hydropower-wind-solar system in a river basin, the time-varying characteristics of water head under the joint operation of hybrid pumped storage and cascade hydropower, considering time delay, are analyzed. A model for cascade hydropower and hybrid pumped storage operations, considering hydrological coupling characteristics, is established. The active power scenarios of wind and photovoltaic are extracted through the improved SA-CGAN model. Then, a multi-scenario-based stochastic optimization dispatch method for the hybrid pumped storage-cascade hydropower-wind-solar joint generation system is proposed. The whale migration algorithm is used to improve the solution efficiency. Through simulation verification, the flexible complementarity of hybrid pumped storage and cascade hydropower can effectively improve the economic and reliable power supply of the hydropower-wind-solar renewable energy base in the river basin.

Keywords Hydro-wind-solar energy base, Hybrid pumped storage, Stochastic optimization, Whale migration algorithm.