By Benoît Robyns, Bruno François, Gauthier Delille , Christophe Saudemont
This publication offers with the administration and valuation of power garage in electrical strength grids, highlighting the curiosity of garage structures in grid functions and constructing administration methodologies in response to man made intelligence tools. The authors spotlight the significance of storing electricity, within the context of sustainable improvement, in "smart grids", and speak about a number of companies that storing electricity can bring. Methodological instruments are supplied to construct an power administration procedure garage following a universal process. those instruments are in line with causal formalisms, synthetic intelligence and particular optimization ideas and are offered through the publication in reference to concrete case reviews
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Extra resources for Energy Storage in Electric Power Grids
The sodium-sulfur option can be used for large capacities (several MW and several MWh with a typical time constant of 7 h), which makes it suitable for storage systems supporting electrical grids. 14). NaS technology uses widely available, low-cost materials (sodium sulfide, aluminum oxide and aluminum) and is an attractive solution for energy storage in fixed batteries, the regulation of grids and the optimization of station operations over periods of several hours [BOY 13]. 14. 4. 2 V. Mass performance is up to two times higher than that of lead-acid, and power performance can be excellent [MUL 13].
From this, we can deduce that the electrical consumption for 1 kWh of turbined energy is Wpumped = 1/( ηt . 643 kWh 6) With the four groups consuming 100 m3/s, a stored reserve of 2,000,000 m3 will enable operation for: Tt = 2,000,000/100 = 20,000 s, or 5 h and 33 min 7) With all four groups pumping 48 m3/s, pumping 2,000,000 m3 requires a time of: Tp = 2,000,000/48 = 41,666 s, or 11 h and 34 min. 5. 1. Principle of compressed-air storage The storage of electricity using compressed air is a procedure that has been known and used on a large scale for more than 30 years.
Note that in this example there is no reversible storage of electricity, but rather thermal storage assisting with the highly variable production of electricity. 11. Utilization of molten salts as a heat-transferring fluid in a heliothermodynamic solar power facility (source: Randy Montoya) A true electricity storage system can be obtained via thermal pumping (pumped heat electricity storage); this concept consists of using a heat pump to store energy in thermal form in cheap solid materials with a high expected efficiency [MUL 13].