2017 Hurricane Harvey

Transcription

1 2017 Hurricane Harvey Bret Burford, PE AEP Transmission Technical Support Corpus Christi, TX Texas A&M Relay Conference College Station, TX March 27-29, 2018

2 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

3 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

4 Category -4 Hurricane Harvey Statistics

5 Hurricane Harvey Statistics First Category 4 hurricane to impact the Coastal Bend area since Celia in Transmission circuits outaged 68 Substations outaged 270 Distribution circuits outaged 176 Transmission outage entries logged by Transmission Operators (Momentary & Permanent) 1 st Transmission outage was Friday 15:56 CDT Last Transmission outage was Saturday 14:22 CDT 95 Transmission Faults Recorded by a single device at DuPont Switch Ingleside across roughly 9 hours

6 Hurricane Harvey Statistics 220,000 Day 7 Day 14

7 Hurricane Harvey Statistics

8 Sequence of Outages (Hour 0) Legend: Solid In Service Dashed -OUT Line out for CB clearance

9 Sequence of Outages (Hour 1-4) Legend: Solid In Service 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 Barney Davis 138kV Bus #1 Airline-Barney Davis 138kV Naval Base-Port Aransas 69kV Fulton-Rockport 69kV Fulton-Live Oak-Rockport 69kV

10 Sequence of Outages (Hour 1-8) Legend: Solid In Service 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-Ingleside Cogen #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

11 Sequence of Outages (Hour 1-12) Legend: Solid In Service Dashed -OUT Rincon-White Point 138kV 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 DuPont Ingleside-Rincon #1 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 # kV Auto Airco-Carbide 138kV

12 Sequence of Outages (Hour 1-23) Legend: Solid In Service Dashed -OUT Blessing-Lolita 138kV Victoria kV Auto #2 Coleto Creek-Victoria South 138kV El Campo-Victoria 138kV Cantwell-Weil Tract 138kV Cantwell-Citgo NOP 138kV Blessing-Port Lavaca 69kV

13 Transmission Line Damage STP-White Point 345kV line structures down

14 Transmission Line Damage 69kV line structure down near Aransas Pass

15 Transmission Line Damage 549 Transmission structures down 217 Transmission structures with other damage Insulators, Static wire, Conductor, X-arm, X-brace, etc kV lines outaged STP-White Point line: 120 structures down (H-frame, steel lattice) kV lines outaged 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)

16 Transmission Line Damage 20-69kV lines outaged 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)

17 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 kv transformer failed (afterwards) More damage on next slides

18 Substation Damage 5 Barney Davis 138kV CB bushing failures / flashovers

19 Substation Damage Fulton 69-12kV control house roof blown off

20 Substation Damage Live Oak 69-12kV control house destroyed

21 Substation Damage Morris Street #3-12kV PTs failed in switchgear

22 Tatton 69-12kV substation Substation Damage

23 Distribution Damage

24 Distribution Damage Non-ping meters Pole damage Areas impacted by Hurricane Harvey included: Corpus Christi, Port Aransas, Aransas Pass, Rockport, Fulton, Refugio, Port Lavaca, Bay City and Victoria.

25 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

26 Transmission Restoration (Day 1-3) Legend: Solid In Service Dashed -OUT Day 1: Naval Base-North Padre 69kV Lon Hill-North Edinburg 345kV Barney Davis 138kV Bus #2 Barney Davis 138kV Bus #1 Airline-Wooldridge-Barney Davis 138kV Cantwell-Citgo NOP 138kV Coleto Creek-Lon Hill 345kV Cantwell-Weil Tract 138kV Victoria kV Auto #1 Victoria kV Auto #2 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

27 Transmission Restoration (Day 4) Legend: Solid In Service 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 Rincon-White Point 138kV Magruder-Thomaston 138kV Rincon-White Point 69kV DuPont Ingleside-Ingleside 138kV Rincon-Rockport 138kV Lon Hill-White Point 345kV DuPont Ingleside-OxyChem 138kV

28 Transmission Restoration (Day 5) Legend: Solid In Service Dashed -OUT Day 5: Edna-Victoria 138kV Palacios-Brookhollow 69kV Barney Davis-Holly 138kV DuPont Ingleside-Rincon #2 138kV Big 3-Vistron 138kV DuPont Ingleside-Rincon #1 138kV Carbide-Vistron 138kV Carbide kV Auto #1 Blessing-Lolita 138kV Mustang Island-North Padre 69kV Brookhollow-Port Lavaca 69kV

29 Transmission Restoration (Day 6-7) Legend: Solid In Service Dashed -OUT Day 6: Mustang Island-Port Aransas 69kV DuPont Ingleside-GPP #1 138kV DuPont Ingleside-GPP #2 138kV 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 DuPont Ingleside-Ingleside Cogen #1 138kV Blessing-Bay City 69kV Aransas Pass-Seawall 69kV DuPont Ingleside-Ingleside Cogen #2 138kV 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

30 Transmission Restoration (Day 8-18) Legend: Solid In Service 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

31 Other Participants in the Restoration Effort

32 Interesting Fault Case 1 DuPont Switch-Rincon #2138kV 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 starts Fault clears at Rincon C ph = 0 amps Fault now flashes at DuPont Switch end Fault clears at DuPont Switch

33 Interesting Fault Case 2 Lon 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

34 Interesting Fault Case 2 Lon 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

35 Thanks Questions?