Text Accompanying Entergy Presentation at 2006 IEEE Switchgear Committee Meeting (Oct 3-5)

Hurricane Restoration

INITIAL RESTORATION

Slide Text

Substations energized from 9-Mile generating station

Key transmission substations

Several substations bypassed

Long radial lines feeding substations

In some cases, no primary relaying

Slide Text

Long Term Proposed Solution

Build new elevated control house

Replace all relay panels

Replace all HV circuit breakers

Eliminate Linear Couplers

Replace all control cable

Use existing Entergy Standards

Slide Text

Michoud Switchyard

Temporarily replaced Electromechanical Relays with Microprocessor Relays.

Repair damaged HV circuit breakers.

Repair transformer control cabinet equipment.

Slide Text

Michoud Switchyard

Long Term Proposed Solution

Build new elevated control house

Replace all relay panels

Replace all HV circuit breakers

Eliminate Linear Couplers

Replace all control cable

Use existing Entergy Standards

Slide Text

Port Sulphur Substation

DAMAGE

Severe water damage.

Control house destroyed by water.

RESTORATION

Build new 115 kV transmission line

Build new 115/34.5kV substation nearby

Slide Text

Carlisle

DAMAGE

Industrial load.

Severe water damage to entire substation and control house.

No damage to submarine cables and associated fiber optic cable.

RESTORATION

Demolish existing control house and install new one

Install new microprocessor current differential relays

Replace remote end relays

Abandon existing HV Circuit Breaker