Important properties of the system power supply. The value of renewable energy to be able to supply electricity when demand is high. Requirements for various energy storage applications, the ability of existing technologies. Energy storage technologies.
Issues in the Storage of Electric Power By Ruth Howes and Sekazi Mtingwa Most of us are now well aware that the economic security of the United States requires development of renewable energy sources, and that our aging electrical grid needs renewal. The storage of electric power is essential to both these objectives. POPA recently prepared a report on this problem that can be downloaded at < . This article summarizes that report. There are at least three critical properties of an electric power supply system: 1) Stable voltage at any current; 2) Stable frequency (critical for digital equipment) and 3) No interruption of service even for very short times. One study (1) estimates that power outages cost US consumers $79 billion annually with 2/3 of this due to outages lasting less than 5 minutes. Short power outages are rarely critical for domestic consumers, but they cause large computer processing operations to reboot all the computers in their systems. For the Fabs where chips are manufactured, even a brief
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