Abstract
Growing penetration of wind power challenges to power system security, since the conventional generators may not have sufficient capacity to compensate wind power fluctuation plus the reverse peak regulation. In this paper, the high-capacity pumped-storage and fast-response battery-storage are coordinated to compensate the variation of both wind power and load, aiming at shifting peak load, responding to wind power ramping, reducing the curtailment of wind and stabilizing the output of thermal units. A practical framework is designed for optimizing the operation of the hybrid system consisting of the wind, pumped-storage, and battery storage, which can take full advantages of pumped-storage and battery-storage. The detailed mathematical formulations of the pumped-storage and battery-storage are built. Three cases are studied to demonstrate the advantages of the proposed coordination method.
Highlights
With the large-scale wind power grid integration, shifting peak load and responding to the wind power variations become challenging problems
This paper investigates the optimal coordination of pumped-storage and battery-storage considering the characteristics of pumped-storage and battery-storage
The thermal units, wind farms, pumped-storage and battery-storage are optimized together according to the system operation conditions, such as the load and wind power
Summary
With the large-scale wind power grid integration, shifting peak load and responding to the wind power variations become challenging problems. Li et al Protection and Control of Modern Power Systems (2018) 3:2 the wind power output [18] These literatures give good examples for applications of battery in micro-grid. There exist many methods and technologies for using pumped-storage or battery-storage to accommodate the wind power variability. It’s not easy to solve the dispatch model, because it includes large scale mix variables and nonlinear constraints [24, 25] This proposed operation framework reduces the scale of variables and constraints, and limits the start-stop times of the thermal units in Intra-Day dispatching. A security-constrained optimal dispatching problem of a hybrid system of wind, pumped storage, and battery storage is mathematically formulated, with the target of compensating the variation of wind power.
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