Circuits

47.Power Electronics by John G. Webster (Editor)

By John G. Webster (Editor)

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B) Uninterruptible power supply (UPS). (c) BESS configured for local load support (power quality). Description of a Battery Storage Plant Battery storage plants are built in two configurations. In the large installations, the facility is usually in a special-purpose BATTERY STORAGE PLANTS 237 40 m BS3 13 m CAPS 13 m PCM PCM 17 m BS2 30 m PCM XFMRs ACSG Utility connection Switch yard DCSG BS1 FCR Converter/ control room Battery room building because of the size of the batteries and equipment. 006 MWh) a modular approach is available that provides the entire system in a prepackaged outdoor module (4).

3 V per cell for several hours to refresh the charge on those cells that are not being fully charged by the float voltage. In some cases, the cell must be replaced. SELECTING AND RATING THE CONVERTER Choice of Power Semiconductors Power semiconductors suited to converters for battery energy storage converters fall into the following classes: Thyristors (SCRs). Latching devices that are turned on by a pulse to the gate terminal and can be turned off only by reversing the anode current. Gate Turn-off Thyristors (GTOs).

W. McMurray, Optimum snubbers for power electronics, IEEE Trans. Ind. , IA-8: 593–600, 1972. G. Mo¨ltgen, Converter Engineering, Chichester: Wiley, 1984. D. A. Paice, Multiple paralleling of power diodes, IEEE Trans. Ind. Electron. , IECI-22: 151–158, 1975. B. R. Pelly, Thyristor Phase-controlled Converters and Cycloconverters; Operation, Control, and Performance, New York: Wiley-Interscience, 1971. E. M. Perrin and E. T. Schonholzer, Fundamental operation of rectifiers with thyristor AC power control, IEEE Trans.

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