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Published byCora Roan Modified over 10 years ago
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“10 SECOND” ANCILLARY SERVICE IT IS ALL ABOUT THE “C” POINT
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ERCOT’s WHITE PAPER FOCUSSES ON “C” POINT ISSUES AS THE REASON FOR FAST IF WE DON’T “CATCH” THE “C” POINT - THE REST OF THE ANCILLARY SERVICES MAY NOT MATTER LAARs HAVE PROVEN THE VALUE OF A “10 SECOND” SERVICE RESPONDING IN 30 CYCLES LAARs ARE EXPOSED TO MORE USE IN THE FUTURE
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“10 SECOND” AS LOW FREQUENCY RESPONSE ONLY 100 mHz DEAD-BAND RESPONDS IN LESS THAN 30 CYCLES AFTER 10 SECONDS STARTS A RAMPED RECALL TO BE FULLY RECALLED IN 20 SECONDS (30 SECONDS TOTAL) IDEALLY PROVIDES PROPORTIONAL RESPONSE FULLY DEPLOYED BY 59.8 Hz
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“10 SECOND” AS STEP RESPONSE WITHIN 30 CYCLES WHEN FREQUENCY REACHES 59.9 MWMW 0.5s10s 30s
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“10 SECOND” AS PROPORTIONAL RESPONSE STARTING WITHIN 30 CYCLES WHEN FREQUENCY REACHES 59.9 Hz FULLY DEPLOYED AT 59.8 Hz MWMW 0.5s10s 30s
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“10 SECOND” AS EVEN IF FREQUENCY REMAINS LOW THE OBLIGATION ENDS IF ALL DEPLOYMENT IS NOT RECALLED AT 10 SECONDS THE RESOURCE THEN STARTS A RAMP TO RECALL ALL DEPLOYMENT BY 30 SECONDS MWMW 0.5s 10s 30s
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SUPPLIERS OF “10 SECOND” AS BATTERIES – POSSIBLE “OVERRATING” DC TIES – POSSIBLE “OVERRATING” LOADS – LAARs – LOTS OF NEW LOADS – BATTERY CHARGERS – LOTS OF APPLIANCES
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LIMITED TIME AND ENERGY OBLIGATION IS THE KEY 100 MW x (10s + 20s/2) = 2,000 MW SECONDS OR 0.56 MWh OVERRATING NOW POSSIBLE USE OF DC TIE NO LONGER A COMMERCIAL ISSUE WHO CARES IF – TURN OF REFRIGERATION FOR 30 SECONDS – STOP CHARGING THE CAR FOR 30 SECONDS – STOP HEATING, PUMPING, ETC, ETC, FOR 30 SECONDS
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