2017 Hurricane Harvey -...

2017 Hurricane Harvey

Bret Burford, PEAEP Transmission Technical Support

Corpus Christi, TX

Texas A&M Relay ConferenceCollege Station, TX

March 27-29, 2018

Presentation Assistance

I would like to Thank:

Everyone at AEP that supplied information & pictures.

AEP Transmission

David Solis

Matthew Estrada

Jimmy Emmert, Jr.

Alfredo Flores

Gerardo Trevino

David Browning

AEP Texas

Tomas Cardenas

Timothy Heard

2017 Hurricane Harvey

• Hurricane Harvey Statistics

• Sequence of Outages during the Storm

• Transmission Line Damage

• Substation Damage

• Distribution Damage

• Sequence of Transmission Restoration

• Interesting Fault Cases

Hurricane Harvey StatisticsC

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Hurricane Harvey Statistics

• First Category 4 hurricane to impact the Coastal Bend area

since Celia in 1970

• 61 Transmission circuits outaged

• 68 Substations outaged

• 270 Distribution circuits outaged

• 176 Transmission outage entries logged by Transmission

Operators (Momentary & Permanent)

• 1st Transmission outage was Friday 8/25/2017 @ 15:56 CDT

• Last Transmission outage was Saturday 8/26/2017 @ 14:22

CDT

• 95 Transmission Faults Recorded by a single device at DuPont

Switch Ingleside across roughly 9 hours


Day 7

Day 14

220,000

Sequence of Outages (Hour 0)

Legend:Solid – In Service

Dashed - OUT

Line out for CB

clearance

Sequence of Outages (Hour 1-4)


Dashed - OUT

Airco-Rincon 138kV

Nueces Bay-White Point 138kV

Blessing-Celanese 138kV

Barney Davis 138kV Bus #2

Airline-Pharaoh-Barney Davis 138kV

Airline-Wooldridge-Barney Davis 138kV

Lon Hill-Sinton 69kV

Carbide-Victoria 69kV

Aransas Pass-Port Aransas 69kV

Beeville-Goliad 69kV

DuPont Ingleside-Hecker #1 138kV

Barney Davis-Holly 138kV

Refugio-Tatton 69kV

Gila-White Point 138kV


Airline-Barney Davis 138kV

Naval Base-Port Aransas 69kV

Fulton-Rockport 69kV

Fulton-Live Oak-Rockport 69kV



Dashed - OUT

Gregory-Rincon 69kV

DuPont Ingleside-White Point 138kV

Blessing-El Campo 69kV

Aransas Pass-Gregory 69kV

Big 3-DuPont Victoria 138kV

DuPont Ingleside 138kV Bus #2

Aransas Pass-DuPont Ingleside 138kV

DuPont Ingleside-Rincon #2 138kV

DuPont Ingleside-Ingleside Cogen #1 138kV

DuPont Ingleside-GPP #2 138kV


DuPont Ingleside-OxyChem 138kV

Aransas Pass-Rockport 138kV

Lon Hill-STEC Warburton 138kV

Rincon-White Point 69kV

Lon Hill-Pelican 138kV

Refugio-Rincon 69kV

Rincon-Rockport 138kV

Refugio-Victoria 69kV

Lon Hill-North Edinburg 345kV

Big 3-Vistron 138kV



Dashed - OUT


Goliad-Victoria 69kV

DuPont Victoria-Joslin 138kV

Carbide-Port Lavaca 69kV

STP-White Point 345kV

Carbide-Joslin 138kV

Coleto Creek-Lon Hill 345kV

Lon Hill-White Point 345kV

Pelican-White Point 138kV


Victoria-STEC Warburton 138kV

Carbide-Vistron 138kV

Port Lavaca-Victoria 69kV

Victoria-Magruder 138kV

Magruder-Thomaston 138kV

Coleto Creek-Kenedy Switch 138kV

Blessing-Bay City 69kV

Victoria #1 138-69kV Auto

Airco-Carbide 138kV



Dashed - OUT

Blessing-Lolita 138kV

Victoria 138-69kV Auto #2

Coleto Creek-Victoria South 138kV

El Campo-Victoria 138kV

Cantwell-Weil Tract 138kV

Cantwell-Citgo NOP 138kV

Blessing-Port Lavaca 69kV

Transmission Line Damage

STP-White Point 345kV line structures down


69kV line structure down near Aransas Pass


• 549 Transmission structures down

• 217 Transmission structures with other damage

• Insulators, Static wire, Conductor, X-arm, X-brace, etc.

• 4 - 345kV lines outaged

• STP-White Point line: 120 structures down (H-frame, steel lattice)


• Airco-Rincon line: 90 structures down (H-frame, wood)

• Lon Hill-Warburton line: 16 structures down (H-frame, wood)

• DuPont Victoria-Joslin line: 13 structures down (H-frame, wood)

• Aransas Pass-DuPont Ingleside line: 4 structures down (H-frame,

wood)

• Aransas Pass-Rockport line: 3 structures down (1-pole, wood)

• DuPont PP1-DuPont Ingleside line: 3 structures down (1-pole, wood)



• Live Oak-Rockport line: 98 structures down (1-pole, wood)

• Refugio-Rincon line: 65 structures down (H-frame & 1-pole, wood)

• Gregory-Rincon line: 50 structures down (1-pole, wood)

• Refugio-Tatton line: 27 structures down (H-frame, wood)

• Fulton-Live Oak line: 20 structures down (1-pole, wood)

• Refugio-Victoria line: 12 structures down (H-frame, wood)

• Port Aransas-Seawall line: 11 structures down (1-pole, wood)

• Port Aransas Ship Channel: UG cable potheads damaged (both ends)

• Blessing-El Campo line: 6 structures down (1-pole, wood)

Substation Damage

• Carbide 69kV metering CT damaged

• O’Connor 69kV switch damaged

• Rockport 69kV Control house roof leak

• 18 station battery banks replaced (during / afterwards)

• 2 Distribution circuit breakers failed (during)

• Port Lavaca 69-12 kV transformer failed (afterwards)

• More damage on next slides

Substation Damage

5 Barney Davis 138kV CB bushing failures / flashovers

Substation Damage

Fulton 69-12kV control house roof blown off

Substation Damage

Live Oak 69-12kV control house destroyed

Substation Damage

Morris Street #3 - 12kV PTs failed in switchgear

Substation Damage

Tatton 69-12kV substation

Distribution Damage

Distribution Damage

Areas impacted by Hurricane Harvey included: Corpus Christi, Port Aransas,

Aransas Pass, Rockport , Fulton, Refugio, Port Lavaca, Bay City and Victoria.

Non-ping meters Pole damage

Transmission Restoration

• Restored the system from “Outside => In”

• Barney Davis – Replacement CBs were already on-hand for

planned replacement project

• Tatton – Temporary 69-12kV station built

• Live Oak – Temporary control cubicle was available/used

• Fulton – New roof and dried out the old EM relays

Transmission Restoration (Day 1-3)


Dashed - OUT

Day 1:

Naval Base-North Padre 69kV

Lon Hill-North Edinburg 345kV



Airline-Wooldridge-Barney Davis 138kV

Cantwell-Citgo NOP 138kV

Coleto Creek-Lon Hill 345kV

Cantwell-Weil Tract 138kV



Magruder-Victoria 69kV

Goliad-Victoria 69kV

Day 2:

Blessing-Palacios 69kV

DuPont Ingleside-White Point 138kV

DuPont Ingleside 138kV Bus #2

Magruder-Victoria 138kV

Day 3:

Nueces Bay-White Point 138kV

Big 3-DuPont Victoria 138kV

Transmission Restoration (Day 4)


Dashed - OUT

Day 4:

Lon Hill-Pelican 138kV

Pelican-White Point 138kV

Lon Hill-Sinton 69kV

Coleto Creek-Victoria South 138kV

Gila-White Point 138kV


Magruder-Thomaston 138kV


DuPont Ingleside-Ingleside 138kV

Rincon-Rockport 138kV

Lon Hill-White Point 345kV

DuPont Ingleside-OxyChem 138kV

Transmission Restoration (Day 5)


Dashed - OUT

Day 5:

Edna-Victoria 138kV

Palacios-Brookhollow 69kV

Barney Davis-Holly 138kV


Big 3-Vistron 138kV


Carbide-Vistron 138kV

Carbide 138-69kV Auto #1

Blessing-Lolita 138kV

Mustang Island-North Padre 69kV

Brookhollow-Port Lavaca 69kV



Dashed - OUT

Day 6:

Mustang Island-Port Aransas 69kV



Blessing-Celanese 138kV

Carbide-Victoria 69kV

Carbide-Joslin 138kV

Aransas Pass-Rockport 138kV

Aransas Pass-Gregory 69kV

Airco-Carbide 138kV

Day 7:

Aransas Pass-DuPont Ingleside 138kV


Blessing-Bay City 69kV

Aransas Pass-Seawall 69kV


Cuero-Thomaston 138kV

Airline-Pharaoh-Barney Davis 138kV

Airline-Barney Davis West 138kV

Edna-El Campo 138kV

Carbide-Port Lavaca 69kV

Beeville-Goliad 69kV

Lon Hill-Medio Creek 138kV



Dashed - OUT

Day 8:

DuPont Ingleside-Hecker #1 138kV

Port Lavaca-Victoria 69kV

Coleto Creek-Kenedy Switch 138kV

Victoria-STEC Warburton 138kV

Day 9:

DuPont Victoria-Joslin 138kV

Blessing-El Campo 69kV

Refugio-Victoria 69kV

Bonnieview-Refugio 69kV

Day 11:

Medio Creek-STEC Warburton 138kV

Day 12:

Fulton-Rockport 69kV

Fulton-Live Oak 69kV

Day 13:

Gregory-Rincon 69kV

Day 14:

Refugio-Tatton 69kV

Day 18:

Bonnieview-Rincon 69kV

Other Participants in the Restoration Effort

Interesting Fault Case 1

DuPont Switch-Rincon #2 138kV line Faults:

33 cycle LG to LLG fault duration – Why so long?

DuPont end tripped at 28.5 cycles

Rincon end tripped at 33 cycles

DCB Blocking present until 26 cycles – Why?

Fault cause = broken jumper on C phase at DuPont end.

Thus, no current on C phase at DuPont end until fault

flashes over at that end.

Non-directional 3I0 DCB Start at DuPont end caused

Blocking and delayed Rincon end trip.

Fault clears at

Rincon

Fault clears at

DuPont SwitchFault now flashes at

DuPont Switch end

C ph = 0 amps

Fault starts

Interesting Fault Case 2Lon Hill-White Point 345kV line Faults:

Initial CG fault clears by 87L in 2 cycles.

Note all currents “in-phase” like a GSU with no

Generation output. This occurred when the only

true source to White Point was the Beeville 69kV

source.

Fault cause = Static wire down near White Point end.

Auto-reclose from this weak source end with fault present

eventually trips by Line Pickup in 13.5 cycles.

Line Pickup OP

Interesting Fault Case 2Lon Hill-White Point 345kV line Faults:

Auto-reclose from this weak source end with fault

not present until a short time later.

Fault is now below the 87L pickup and Line Pickup is

disabled and the fault is not consistently there.

Fault finally produces a Z1G element trip at 1.74 seconds

after the fault first re-appeared.

Fault re-appears

Z1G trip

Thanks

Questions?

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