Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1986-02-24
1987-09-08
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 64, 307 82, 363 49, 323323, H02J 906
Patent
active
046926321
ABSTRACT:
To supply various loads connected to a uninterruptible bus, a power supply system N is connected (when functioning normally) by means of a mechanical switch, keeping an energy storage unit charged by means of a static converter which also functions preferrably as a phase shifter to stabilize the supply voltage. In the event of a power system malfunction, the storage unit is discharged by means of the static converter arrangement, and the mechanical switch is opened. The opening of this switch is not critical since between the switch and uninterruptible bus there is an inductance arrangement and an auxiliary switch. In case of a power system malfunction (auxiliary switch open), a large inductance and its large corresponding impedance of the inductive impedance arrangement becomes effective which during proper operation of the power system is shunted. Thus, during proper operation of the system only low inductive impedances (11, 12) and their correspondingly low impedances are effective via which a high current can flow from power supply system N, which suffices to trigger the load unit fuses in the event of a load unit short-circuit thus allowing such loads to self disconnect and not interrupt the bus by dragging it down with a heavy current malfunction.
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Gaul Hartmut
Haboeck Adolf
Mickal Hermann
Ip Shik Luen Paul
James John L.
Shoop Jr. William M.
Siemens Aktiengesellschaft
Ulbrich Volker R.
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