System for supplying electrical energy to electrical apparatus

Details System for supplying electrical energy to electrical apparatus System for supplying electrical energy to electrical apparatus

1999-09-07

2001-02-13

Ballato, Josie (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

C307S066000

Reexamination Certificate

active

06188143

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a system for supplying electrical energy to an electrical apparatus.
DESCRIPTION OF RELATED ART
In certain applications, in particular in the field of electronics and microelectronics, it is necessary to have a high quality supply.
Such a supply must continuously furnish a very stable frequency, which is to say, for example, with variations less than about 1%, variations of the voltage value less than about 10%, preferably less for example than 8%, and this for a power which can reach for example 30 megawatts.
Moreover, when there is a cutoff or a voltage drop in the supply, the latter must not be translated into a variation of frequency and of voltage beyond fixed limits.
Thus, the public electric energy distribution networks, adapted to suffer micro-interruptions of a duration of 100 to 800 ms, accompanying a drop in supply voltage value, do not permit providing a suitable supply for such installations.
SUMMARY OF INVENTION
The object of the invention is to provide a supply system capable of a high quality supply, which is to say capable of responding to the emergencies mentioned above.
It therefore has for its object a system of supplying electrical energy to at least one electrical apparatus connected to a supply line connected to a network for the distribution of electrical energy, comprising moreover at least one electrical energy generator connected to the line and, interposed between the network and the line, means for compensating disturbances in the supply furnished to the apparatus, the compensation means comprising means for storing active electrical energy adapted to exchange the active electrical energy with the electrical apparatus, upon the appearance of a disturbance.
The supply system according to the invention can moreover comprise one or several of the following characteristics, taken alone or in any technically possible combinations:
the energy storage means comprise at least one rotating mass associated with reversible conversion means of mechanical energy into electrical energy, connected to a supply line of the apparatus;
the system comprises moreover frequency converter means associated with the energy storage means;
moreover it comprises means for reversibly converting an active power delivered by the energy storage means into active power adapted to be exchanged with the apparatus;
the system moreover comprises at least one voltage-increasing transformer connected between the supply line to the electrical apparatus and the energy storage means.
Other characteristics and advantages will become apparent from the following description, given solely by way of example and with reference to the accompanying drawings, in which:


REFERENCES:
patent: 5821630 (1998-10-01), Schutten
patent: 5917251 (1999-06-01), Schermann et al.
patent: 5994794 (1999-11-01), Wehrlen
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