Introducing a novel liquid air cryogenic energy storage system using phase change material, solar parabolic trough collectors, and Kalina power cycle (process integration, pinch, and exergy analyses)

Optimization of peak loads among multiple provincial power grids under a central dispatching authority

Short-term peak shaving operation for multiple power grids with pumped storage power plants

Fueled power systems using secondary energy storage are analyzed. A generic model of such systems is suggested, and an optimal power management strategy that maximizes efficiency is derived analytically. The model and optimal management solution emphasizes the constraint imposed by finite storage capacity. The optimal generated energy is established independently of the system's capacity, and load, and general characteristics of it are derived and proved. The analytic solution provides an intuitive comprehension into the optimal power management, without needing numeric simulations.

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Optimal Power Management in Fueled Systems With Finite Storage Capacity

A simulated battery energy storage (BES) system is considered for integration into Taiwan Power Company System to study the economic benefits of the BES. The system had a pumped storage power plant with four units. The authors applied multipass dynamic programming to the solution of the short term hydrothermal coordination problem considering pumped storage and battery energy storage systems. The algorithm can quickly converge to an optimal generation schedule while achieving the minimum production cost of power systems. Substantial savings of memory and CPU time were realized by using this efficient algorithm. The load, committed units, and available water usage data from 9:00 PM June 17, 1988 to 9:00 PM June 24 were used to test this algorithm. Results showed that within 20 minutes on a PC/386 this algorithm could find the optimal generation schedule of all the units and the switching time of the BES while satisfying all the constraints. >

The effect of pumped storage and battery energy storage systems on hydrothermal generation coordination

This paper deals with the problem of obtaining the optimal scheduling of a pumped storage hydroelectric plant in combination with, several interconnected power systems. A special case of interest is the scheduling of pumped storage when the plant is jointly owned by several electric utilities. A mnathematical model is developed in order to determine the power flows between the different power systems and the pumped storage plant as well as the water flows inside the plant.

Miguel J. Cobian

Papers

Optimal Pumped Storage Operation with Interconnected Power Systems