Alstom

Alstom Holdings

Jean-Paul Audren

Jean Marmonier

The invention provides a &ldquo;hybrid&rdquo; high voltage multiphase distribution substation having one or more sets of busbars including at least one air-insulated set of busbars ( ), the substation having feeders (A, B, C, D) for air-insulated lines ( ) placed in substantially parallel bays ( ) on either side of the set(s) of busbars ( ) and including metal-clad breaking and switching modules each formed by metal cladding ( ) containing, for each electrical phase passing through a module, breaking and disconnection systems connected to a phase conductor ( ) in an insulating gas, an end disconnection system ( A, B) being placed at each of the two ends ( ) of a module, the substation being characterized in that the feeders are opposite in facing pairs, and in that two opposite feeders (A, B) are electrically interconnected for each electrical phase via a single module ( ) when the break systems ( A, B, C) and the end disconnector systems ( A, B) of said module are closed, said end disconnector systems each being connected to a respective feeder (A, B).

High voltage hybrid station with opposite busbars and shielded cutoff and switching modules for same

The hybrid high-voltage substation comprises firstly equipment implemented using metal-clad technology and constituted by at least one single or double busbar set, and secondly equipment implemented using conventional air-insulated technology so as to form feeders disposed in bays approximately perpendicular to said busbar set. The substation incorporates at least one air-insulated backup line approximately parallel to the busbar set and performing the function of backup phase to enable the substation to operate in &ldquo;degraded&rdquo; manner.

Hybrid high-voltage substation having busbars that are enclosed in metal cladding and a backup phase that is air insulated

The 4 mA-20 mA type or 0-20 mA type current loop connects an analog sensor ( ) to an acquisition system ( ), respectively carrying a sensor current (Ic) and an acquisition current (Ia). A test circuit is connected in parallel with the current loop to inject a superposition current (Is) into said loop, which current is superposed on the sensor current (Ic) or on the acquisition current (Ia). In a first embodiment, a variable voltage generator ( ) injects the superposition current (Is) by adding it to the acquisition current (Ia), thereby making it possible to check a low-current threshold of the acquisition system ( ). In a second embodiment, a variable current regulator injects the superposition current (Is) by adding it to the sensor current (Ic), thereby making it possible to check a high-current threshold of the acquisition system. The high- and low-current thresholds of the acquisition system are tested without opening the current loop.

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Aix les Bains, France

Jean-Paul Audren