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Power electronic control in electrical systems 29

Fig. 1.22 Distribution system data sources.

own and are able to measure electricity consumption, power factor and average load
factor.

1.6.3 Planning

At the planning level, increasingly powerful computer resources are dedicated to
hosting the extensive power systems analysis tools already available (Stoll, 1989). At
present, the emphasis is on corporate databases, geographic information systems and
interactive graphics to develop efficient interfaces which blend seamlessly with legacy
power systems software. The current trend is towards web applications and e-busi-
ness which should help companies to cope with the very severe demands imposed on
them by market forces.

1.7 Conclusion

This chapter has presented an overview of the composition of electrical power net-
works and the computer assisted studies that are used for their planning, operation
and management.
The main plant components used in modern power networks are described, and
the growing ascendancy of power electronics-based equipment in power network
control is emphasized. This equipment is classified into equipment used in high
voltage transmission and equipment used in low voltage distribution. The former
belongs to the family of plant components known as FACTS equipment and the
latter belongs to the family of Custom Power equipment. A generic power system