Balancing Authority ACE Limit Proof-of-Concept Field Trial Project 2010-14 WECC Update Discussion April 10, 2012 DISCUSSION STARTING AT 3:30 PM EDT Brian Van Gheem - MISO Balancing Authority Reliability-based Control Standard Drafting Team (BARCSDT)
Balancing Authority ACE Limit Proof-of-Concept Field Trial Western Interconnection Field Trial Participation Participation reflects approximately xx% of the projected 2010 peak load for the Western Interconnection
Clock-Minute Frequency Below 59.932 Hz FTL Low Prevailing Time PTimeZone FreqError ActualFreq SchedFreq 02/06/2012 18:04 MST -0.07 59.9312 60.00
Clock-Minute Frequency Above 60.068 Hz FTL High Prevailing Time PTimeZone FreqError ActualFreq SchedFreq NONE
Balancing Authority ACE Limit Proof-of-Concept Field Trial The Balancing Authority ACE Limit (BAAL) shall not be exceeded for more than 30 consecutive clock-minutes* MinCtLow BAAL Low BAAL High BAAL Low BAAL High BAAL Low BAAL High BAAL Low BAAL High BA Number MinCtLow MinCtHigh MinCtLow2 MinCtHigh2 MinCtLow MinCtHigh LowLimitCt HighLimitCt BA05 44 42 58 49 25 28 25 28 BA06 16 20 16 20 12 20 12 20 BA07 43 36 29 41 14 15 14 15 BA08 35 41 19 34 13 11 13 11 BA09 11 9 15 55 6 9 6 9 BA11 12 14 16 7 4 9 4 9 BA12 14 13 14 17 8 2 8 2 BA13 9 27 12 45 6 4 6 4 BA14 23 31 13 55 2 1 2 1 BA15 5 7 7 5 0 0 0 0 BA16 19 27 25 34 5 12 5 12 BA18 10 13 25 15 1 2 1 2 BA19 24 38 30 34 9 7 9 7 BA22 9 10 15 14 9 6 9 6 BA23 20 18 13 27 4 5 4 5 BA24 25 19 0 0 18 18 18 18 BA25 15 22 21 14 7 4 7 4 BA26 19 23 43 41 13 20 13 20 BA27 23 22 16 15 1 1 1 1 BA28 22 24 38 39 6 10 6 10 BA29 17 15 16 16 9 1 9 1 BA30 26 38 47 39 7 4 7 4 BA31 20 23 29 28 11 11 11 11 BA33 26 52 28 58 12 13 12 13 BA34 16 17 23 29 16 11 16 11 BA36 69 51 114 25 11 23 11 23 = Count of consecutive clock-minutes BAAL Low was exceeded MinCtHigh = Count of consecutive clock-minutes BAAL High was exceeded MinCtLow2 = Count of consecutive clock-minutes BAAL Low was exceeded MinCtHigh2 = Count of consecutive clock-minutes BAAL High was exceeded *BAAL being exceeded for more than 30 consecutive clock-minutes would be a violation under the draft BAAL standard.
Statistics of BAAL being exceeded > 25 consecutive clock-minutes : Date Time Time Zone Actual Freq Sched Freq MinCtLow MinCtHigh CPS1 ACPS1 MinCtLow2 MinCtHigh2 LowLimitCt HighLimitCt 2/27/2012 22:41 MST 60.022 60.00 0 16-8010.21-8010.21 0 0 0 16 2/27/2012 22:42 MST 60.032 60.00 0 17-12031.9-12031.9 0 0 0 17 2/27/2012 22:43 MST 60.028 60.00 0 18-9854.58-9854.58 0 0 0 18 2/27/2012 22:44 MST 60.023 60.00 0 19-7693.13-7693.13 0 0 0 19 2/27/2012 22:45 MST 60.018 60.00 0 20-4110.93-4110.93 0 0 0 20 2/27/2012 22:46 MST 60.027 60.00 0 21-7093.6-7093.6 0 0 0 21 2/27/2012 22:47 MST 60.019 60.00 0 22-5338.24-5338.24 0 0 0 22 2/27/2012 22:48 MST 60.024 60.00 0 23-8290.4-8290.4 0 0 0 23 2/27/2012 22:49 MST 60.013 60.00 0 24-2696.55-2696.55 0 0 0 24 2/27/2012 22:50 MST 60.025 60.00 0 25-6410.82-6410.82 0 0 0 25 2/27/2012 22:51 MST 60.026 60.00 0 26-7065.85-7065.85 0 0 0 26 2/27/2012 22:52 MST 60.016 60.00 0 27-4389.01-4389.01 0 0 0 27 2/27/2012 22:53 MST 60.007 60.00 0 28-872.957-872.957 0 0 0 28
Examples in this Presentation Example# Type #mins Sched Freq Start Time Time Zone Stop Time Time Zone 1 BAAL High 28 60 2/27/12 22:26 MST 2/27/12 22:53 MST
EXAMPLE 1
02/27/2012 ending 22:53 MST 28-minute duration above BAAL High 60.08 EI Clock-Minute Average Frequency FTL 60.06 60.04 60.02 Frequency (Hz) 60.00 59.98 59.96 59.94 FTL 59.92 Clock-minute Actual Frequency of Participants
02/27/2012 ending 22:53 MST 28-minute duration above BAAL High 3000 ACPS1 Clock-Minute Averages 2000 1000 ACPS1 CF (%) 0-1000 BAAL -689.5-2000 -3000 Adjusted CPS1 of individual BAs under the Field Trial
02/27/2012 ending 22:53 MST 28-minute duration above BAAL High 30 Consecutive Minutes Exceeding BAAL BAAL shall not be exceeded for more than BAAL Violation* 30 consecutive clock-minutes * 25 Consecutive Minutes Exceeding BAAL 20 15 10 5 0 *BAAL being exceeded for more than 30 consecutive clock-minutes would be a violation under the proposed standard.
Balancing Authority ACE Limit Proof-of-Concept Field Trial Examples of circumstances when BAAL was exceeded and actions taken if appropriate On a monthly basis, each Balancing Authority will review its performance for the prior month and identify any periods where the ACE exceeded the low BAAL ( BAAL Low ), the high BAAL ( BAAL High ), the low ATL or high ATL for more than 30 consecutive clock-minutes. To help the RBCSDT gain a better understanding of the circumstances that all Balancing Authorities may be faced while operating under BAL-007, each Balancing Authority will provide a brief explanation of the circumstances related to any periods where the duration of consecutive clock-minutes exceeded 30 minutes. In the event that no period exceeded 30 minutes in the prior month, but the longest duration exceeded 25 minutes, the Balancing Authority will provide a brief explanation of the circumstances related to that longest-duration event. Limit Exceeded (Enter one of the following: BAAL high, BAAL low, ATL high, ATL low) Clock-minute of ACE exceeding the BAAL or ATL (mm/dd/yy hh:mm) Clock-minute of ACE returning within the BAAL or ATL (mm/dd/yy hh:mm) TimeZo ne Total duration of ACE exceeding the BAAL or ATL (minutes) Event associated with a DCS- Reportable Event? (0=No, 1=Yes) Event associated with a resource loss other than a DCS- Reportable Event? (0=No, 1=Yes) Brief explanation of circumstances and notable actions taken if applicable BAAL HIGH 2/27/12 22:26 2/27/12 22:54 MST 28 0 0 Wind speed increased intra-hour causing generation to increase with frequency trending above 60 Hz. Forecast did not indicate an increase in wind speed. Operator deployed dec resources, but wind speed continued to increase, so operator initiated measures to cap turbine output to return ACE to zero.
Balancing Authority ACE Limit Proof-of-Concept Field Trial Project 2010-14 Discussion Brian Van Gheem - MISO Balancing Authority Reliability-based Control Standard Drafting Team (BARCSDT) bvangheem@misoenergy.org