Path Rating Catalog 2013 - Western Electricity Coordinating Council
Path Rating Catalog 2013 - Western Electricity Coordinating Council Path Rating Catalog 2013 - Western Electricity Coordinating Council
III-11. TOT 4B (Pre-Gateway) Location: Definition: Transfer Limit: Critical Disturbance that limits the transfer capability: Added January 2013 Accepted Rating Existing Rating Northwest Wyoming Sum of the flows on the following transmission lines: Line Metered End CarrDraw-Buffalo 230 kV CarrDraw Sheridan-Tongue River 230 kV Sheridan Spence-Thermopolis 230 kV Spence Alcova-Raderville 115 kV Alcova Casper-Midwest 230 kV Casper Riverton-Thermopolis 230 kV Riverton Riverton-230/115 kV transformers Riverton 230 kV Other Subtract PreCorp load at Sheridan Southeast to Northwest: 829 MW (Non-simultaneous) Northwest to Southeast: Not defined Depending on flows on the adjacent TOT 4A path, the real-time rating can range between a minimum of 0 MW and a maximum of 829 MW (Reference attachment). Typically, the real-time rating centers around 475 MW. The critical disturbances and limiting elements vary with the various points on the nomogram. Reference attachment for further information. When: Rating Study Approved on 10/8/2010 System Conditions: Study Criteria: Remedial Actions Required: Formal This rating is independent of transfer levels between major areas of WECC. Historically, the flows have all been southeast to northwest across the path. (Summary) System intact: • Per unit voltages between 0.95 p.u. and 1.05 p.u. • All lines and transformers loaded to less than continuous rating. Single contingency outage conditions: • Per unit voltages between 0.90 p.u. and 1.10 p.u. • All facilities loaded to less than 100% of emergency ratings. Remedial actions are required to achieve the rated transfer capability. Following an outage, all overloaded lines and transformers must have their loading reduced to continuous ratings within 15 minutes. This is accomplished by reducing schedules or lowering local generation. There is a formal operating proceduredated 4/12/1991. PAC is the PART VI Item 1-236
Operating operating agent and uses real-time flows to monitor the path. Procedure: Allocation: PAC and WAPA share the transfer capability of the path. Interaction See attachment w/Other Transfer Paths: Contact Person: Craig Quist PacifiCorp 1407 W. North Temple - Suite 275 Salt Lake City, UT 84140 (801) 220-4264 (801) 220-2842 - fax craig.quist@pacificorp.com WYOMING SYSTEM OPERATING CURVE (2012 Winter Nomogram) SYSTEM NORMAL (2009 STUDIES) SYSTEM NORMAL POWERFLOW TOT FLOWS (MW) LIMITING OUTAGE LIMITING CONDITION CASE 4A 4B LINE KV BUS/LINE KV LIMIT Estimated 09LW- 87 829 YELLOWTAIL- 230 OREGON BASIN 0.9 C5E1L(11,12) SHERIDAN 230 KV 09LW- 301 829 GRASS CREEK- 230 GRASS CREEK 0.9 C5C4l(9,10) THERMOPOLIS 230 KV 09LW- 401 809 GRASS CREEK- 230 GRASS CREEK 0.9 C5A1A(9,10) 09LW- C5(H2C9,G2B9) THERMOPOLIS 639 746 MINERS- PLATTE 230 KV 230 BADWATER 230 KV PART VI Item 1-237 0.9
- Page 195 and 196: 73. North of John Day Revised Decem
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- Page 259 and 260: January 2013 III-16. Idaho to North
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- Page 269 and 270: Revised December 2010 II-1. Navajo
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- Page 277 and 278: Added February 2010 II-6. Southwest
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- Page 281 and 282: II-8. IID - SCE March 2013 Accepted
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Operating operating agent and uses real-time flows to monitor the path.<br />
Procedure:<br />
Allocation: PAC and WAPA share the transfer capability of the path.<br />
Interaction See attachment<br />
w/Other<br />
Transfer <strong>Path</strong>s:<br />
Contact Person: Craig Quist<br />
PacifiCorp<br />
1407 W. North Temple - Suite 275<br />
Salt Lake City, UT 84140<br />
(801) 220-4264<br />
(801) 220-2842 - fax<br />
craig.quist@pacificorp.com<br />
WYOMING SYSTEM OPERATING CURVE (2012 Winter Nomogram)<br />
SYSTEM NORMAL<br />
(2009 STUDIES)<br />
SYSTEM NORMAL<br />
POWERFLOW TOT FLOWS (MW) LIMITING OUTAGE LIMITING CONDITION<br />
CASE 4A 4B LINE KV BUS/LINE KV LIMIT<br />
Estimated<br />
09LW-<br />
87 829 YELLOWTAIL- 230 OREGON BASIN 0.9<br />
C5E1L(11,12)<br />
SHERIDAN<br />
230 KV<br />
09LW-<br />
301 829 GRASS CREEK- 230 GRASS CREEK 0.9<br />
C5C4l(9,10)<br />
THERMOPOLIS<br />
230 KV<br />
09LW-<br />
401 809 GRASS CREEK- 230 GRASS CREEK 0.9<br />
C5A1A(9,10)<br />
09LW-<br />
C5(H2C9,G2B9)<br />
THERMOPOLIS<br />
639 746 MINERS-<br />
PLATTE<br />
230 KV<br />
230 BADWATER 230<br />
KV<br />
PART VI Item 1-237<br />
0.9
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