3nd Quarter 2014 VRL Report Gentry Tubbs

Monitored Element- LONGWOO – OAK_PHEC 138 kV LN Contingent Element- SWSHREV XFR MIDI S 345/138 KV Reason for Violating: Ongoing outage of xfmr; high load in area and a resource was offline, relieving resource was maxed out; it took some time to get into a good ramp range for unit to provide relief. TEMP48_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP48_203587/2/ :207/2/ :35OC VRL TEMP48_203587/14/ :407/14/ :40OC VRL

SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado New Mexico Texas West East Iowa Arkansas Missouri SPS NPPD EES T48 LONOAKSWSXFR

Monitored Element- Bell – KSCO3 69kV LN:230 Contingent Element- SUMNER – OXFO 138kV LN: OXFO_SUMNER Reason for Violating: Local issue; Local generation came offline and relieving generation was not fixing the issue; Local generation brought back on line. TEMP05_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP05_204117/2/ :107/2/ :30OC VRL

Monitored Element- Bell – KSCO3 69kV LN:230 Contingent Element- SUMNER – OXFO 138kV LN: OXFO_SUMNER Reason for Violating: One-day outage of 138kV line; generation able to control the constraint, but a low ramp rate and the unit not staying right on dispatch led to a lot of violations. TEMP05_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP05_204119/8/ :059/8/ :30OC VRL

6 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T5 BELMILSUMOXF

Monitored Element- South Hayes Contingent Element- Knoll1 XFR Reason for Violating: High load in NW Kansas/Hays area, violated until a local resource came online after noon and another came online around 16:00 SHAHAYKNOXFR 7 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE SHAHAYKNOXFR7/5/ :257/5/ :30OC VRL

Monitored Element- South Hayes Contingent Element- Knoll1 XFR Reason for Violating: High load in NW area; Unit shut down, effective limit was lower than SOL and we violated until load in the area dropped off. SHAHAYKNOXFR 8 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE SHAHAYKNOXFR9/18/ :159/18/ :25OC VRL

9 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri SHAHAYKNOXFR

Monitored Element- Ogalala – Brule 115kV Contingent Element- Stegall 345/230 kV Xfmr Reason for Violating: Planned outage of a Line; normal reconfigurations were not an option. TLR needed to control external impacts on the flowgate; low GSFs on SPP market resources contributed to needing to violate the flowgate up to 102% of the effective limit just to start dispatching down the primary Decrement unit. During the violations on 7/30, we ran out of dispatchable room and had to create a post- contingent load shed plan. TEMP50_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP50_204507/29/ :257/29/ :15OC VRL TEMP50_204507/30/2014 9:207/30/ :05OC VRL TEMP50_204507/30/ :057/30/ :10OC VRL

11 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T50 OGABRUSTEXFR

Monitored Element- Mustang – Denver 115kV C.1 Contingent Element- Mustang – Denver 115kV C.2 Reason for Violating: A CA requested more of a resource to be brought online after a unit tripped. The plant was operating with a high Eco Min due to testing for HE 15, and the others were dispatched to their Eco Min and we had no more room to move down on the resources. TEMP63_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP63_204668/7/ :058/7/ :05OC VRL

13 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T63 MUSDENMUSDEN

Monitored Element-OSAGE CANYON 115 kV Contingent Element-BUSHLAND DEAFSMITH 230 kV Reason for violating: We shut down two resources, and wind in north SPS increased as well; it took some time for RTBM to resolve the loading. OSGCANBUSDEA 14 Beginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE OSGCANBUSDEA8/13/ :158/13/ :15OC VRL

Monitored Element-OSAGE CANYON 115 kV Contingent Element-BUSHLAND DEAFSMITH 230 kV Reason for violating: Ran out of room to move down on nearby Dec units; had room to move up on Inc units but prices at the time required a violation to 101% to get those units to move up OSGCANBUSDEA 15 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE OSGCANBUSDEA8/24/2014 0:158/24/2014 1:20OC VRL

Monitored Element-OSAGE CANYON 115 kV Contingent Element-BUSHLAND DEAFSMITH 230 kV Reason for Violating: Resource came offline very fast; took some time for RTBM to solve and more generation at another was brought on shortly after OSGCANBUSDEA 16 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE OSGCANBUSDEA9/14/ :459/14/ :55OC VRL

SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado New Mexico Texas West East Iowa Arkansas Missouri SPS OSGCANBUSDEA

Monitored Element- Renfrow7 – RenfrowWF 138kV Contingent Element- Hunters – Woodring 345kV Reason for Violating: Ran out of room to move up on generation; low shift factors and other flowgates binding were competing for Incs/Decs coming across peak load. Nearby wind had very low offers, so prices did not get low enough to dispatch them down. TEMP67_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP67_204728/15/ :058/15/ :15OC VRL

Monitored Element- Renfrow7 – RenfrowWF 138kV Contingent Element- Hunters – Woodring 345kV Reason for Violating: Online generation maxed out; high wind at windfarm, forced outage on a line made Dec GSFs a little bit lower, making it more difficult for RTBM to solve the constraint; also, this flowgate was fighting with another flowgate as well. TEMP67_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP67_204729/1/ :359/1/ :00OC VRL TEMP67_204729/1/ :309/1/ :05OC VRL

20 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T67 RENRENHUNWOO

Monitored Element- GORD 345/138 XFR: WICH_12 Contingent Element- GORD 345/138 XFR: WICH_11 Reason for Violating: Initially not much generation online in Wichita with high load, but generation came online to relieve that constraint, but it hurt Temp43 (which was also loading up due to increasing load and wind dropping in west Kansas). Temp43 violated until generation came online to support the load in the area TEMP09_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP09_204248/22/ :008/22/ :15OC VRL

Monitored Element- GORD 345/138 XFR: WICH_12 Contingent Element- GORD 345/138 XFR: WICH_11 Reason for Violating: Outage on 138kV line; all online local generation maxed out; generation brought online to resolve loading TEMP09_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP09_204249/4/2014 9:359/4/ :35OC VRL

Monitored Element- GORD 345/138 XFR: WICH_12 Contingent Element- GORD 345/138 XFR: WICH_11 Reason for Violating: Ongoing outage of line and the return of another; high load in area; resource committed to relieve the loading TEMP09_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP09_204249/18/ :459/18/ :55OC VRL

24 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T9 WICXFRWICXFR

Monitored Element- RENO 345/1kV XF: 2P Contingent Element- SUMM 345/15kV Reason for Violating: Initially not much generation online in Wichita with high load, but generation came online to relieve that constraint, but it hurt Temp43 (which was also loading up due to increasing load and wind dropping in west Kansas). Temp43 violated until generation came online to support the load in the area TEMP43_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP43_203118/22/ :508/22/ :55OC VRL

26 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T43 RENXFRSUMXFR

Monitored Element- CRSW – KSCO4 69kV Contingent Element- HAYS – PECK 69kV Reason for Violating: Load pocket issue; generation is the only generation that can help this constraint, and they were not following the dispatch up, so the market couldn't drive them up high enough to relieve the loading. TEMP22_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP22_20928/22/ :058/22/ :40OC VRL

28 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T22 CREROMPECHAY

Monitored Element- NOWST1 Contingent Element- NOWST1 Reason for Violating: Increasing load all the nearby Inc generation was already maxed out, no relief left available across afternoon peak NORXFRNORXFR 29 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE NORXFRNORXFR8/22/ :458/22/ :15OC VRL

Monitored Element- NOWST1 Contingent Element- NOWST1 Reason for Violating: High/increasing load. Online generation in the city was already maxed out, nothing left to move up/down to relieve the flowgate NORXFRNORXFR 30 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE NORXFRNORXFR8/23/ :508/23/ :20OC VRL

Monitored Element- NOWST1 Contingent Element- NOWST1 Reason for Violating: Approved derate of generation and resources already at max; other generation brought online, but still not enough generation with short enough lead times; directed wind farm to 0 to try to get relief, then came up with post-contingent load shed plan NORXFRNORXFR 31 ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE NORXFRNORXFR9/3/ :559/3/ :15OC VRL

32 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri NORXFRNORXFR

Monitored Element- Tarby1 161/69kV Contingent Element- AES5 – BONTP 161kV Reason for Violating: Outage of 161kV line; this is an outlet for issue for generation. We initially violated the flowgate because unit was OOMEd (in preparation for the outage) and not dispatchable. Once we released the OOME, they did not follow dispatch or their ramp rate, so they were OOMEd again. TEMP119_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP119_205259/15/ :359/15/ :35OC VRL

Monitored Element- Tarby1 161/69kV Contingent Element- AES5 – BONTP 161kV Reason for Violating: Outage of line; this is an outlet for issue for generation. Unit did not follow dispatch or their ramp rate, they had to be called to tell them to go down to resolve the loading. TEMP119_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP119_205259/23/ :309/23/ :30OC VRL

35 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T119 TARXF2AESBON

Monitored Element- Rose – El Paso 138kV Contingent Element- Rose – Weaver 138kV Reason for Violating: Ongoing outage of a line; no generation online in area. Units were committed to relieve the loading, but it took a while for load to drop and the constraint to be relieved. TEMP125_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP125_205329/17/ :259/17/ :00OC VRL

37 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T125 ROSELPROSWEA

Monitored Element- Seward – St. John 115kV Contingent Element- Finney – Hitch 345 kV Reason for Violating: Sharp increase in the area wind; wind farms limited themselves, which resolved most of the loading. TEMP127_ ConstraintBeginning_Int Ending_IntVRL_TYPE Intervals AVG_SMP AVG_VRL_VALUE TEMP127_205369/21/2014 3:459/21/2014 4:55OC VRL

39 SPS SECI WR NPPD WFEC EES KCPL MPS EDE MEC AECI AECC/EES CSWS OKGE SPA LES OPPD Colorado Wyoming New Mexico Texas Iowa Arkansas Missouri T127 SEWSTJFINHIT