Coordinated Dispatch of Battery and Pumped Hydro Energy Storage utilizing hydraulic short circuit

This study explores the dispatch of a system comprising a Pumped Hydro Energy Storage with a ternary machine set and a Battery Energy Storage. The coordinated operation of both storage systems aims to optimize the use of their capacities efficiently. The coordinated system actively participates in day-ahead and intraday markets, as well as ancillary service markets. Utilizing Mixed-Integer Linear Programming models for both storage systems, a simulation study is conducted. The models encompass relevant parameters, variables, and an objective function to generate an optimized dispatch strategy for each storage system, focusing on participating in the spot market and providing ancillary services. Additionally, German electricity market regulations are considered in the models. Simulation results demonstrate that coordinated operation leads to significantly higher renenues of 6.23% compared to uncoordinated system, primarily attributed to increased earnings from providing ancillary services. The coordination enhances overall system flexibility and results in an increase in operating hours for ancillary service provision.