MOD4210 v 2 Changes to the Single Ramp

MOD_42_10 v 2 : Changes to the Single Ramp Up Rate and the Single Ramp Down Rate Calculation

Single Ramp Rate MSP Software uses ØA single ramp rate based on time to ramp between min & max outputs Generator Units can specify: Ø 5 ramp up rates over 4 ranges and 5 ramp down rates over 4 ranges. ØDwell times describe output levels at which ramping must pause. Output (MW) RAMP UP Slope = Single Ramp Up Rate RAMP DOWN Availability Slope = Single Ramp Down Rate Dwell Times Min Stable Generation Time

Single Ramp up Rate MW Real-Time Availability RUR 3 Ramp up Break Point RUR 2 Ramp up Break Point RUR 1 MINGEN Load up Break Point 2 Load up Break Point 1 Block Load Time Soak Time 1 Soak Time 2 LUR 1 LUR 2 LUR 3 Dwell Time 1 Dwell Time 2

Single Ramp up Rate MW Real-Time Availability Single Ramp up Rate RUR 3 Ramp up Break Point RUR 2 Ramp up Break Point RUR 1 MINGEN Time Dwell Time 1 Dwell Time 2

Single Ramp up Rate The Single Ramp up Rate calculation is: = (Max(Availability) – Min(Minimum Generation))/Ramp. Up. Time The Single Ramp Down Rate calculation is: = (Max(Availability) – Min(Minimum Generation))/Ramp. Down. Time

Single Ramp down Rate MW Real-Time Availability RDR 3 Ramp Down Break Point 2 RDR 2 Ramp Down Break Point 1 RDR 1 MINGEN DLR 2 Deloading Break Point DLR 1 Time Dwell Time 2 Dwell Time 1

Single Ramp down Rate MW Real-Time Availability (MAXGEN) RDR 3 Single Ramp down Rate Ramp Down Break Point 2 RDR 2 Ramp Down Break Point 1 RDR 1 MINGEN Time Dwell Time 2 Dwell Time 1

Overview of Changes in the T&SC Registration Data VTOD Spot Values Profiled values Other relevant parameters T&SC current Minimum Generation Name Minimum Stable Generation Outturn Minimum Stable Generation Minimum Output T&SC new Name Lower Registered Output Minimum Generation Outturn Minimum Stable Generation Minimum Output T&SC Glossary What it is incorrect Ok Ok incorrect Ok The registered value of MINOUT (Minimum Output), which is zero for all units except Pumped Storage (-73) and Interconnectors (in the systems this value is zero for all units except PS) The value of minimum stable generation for the unit, which is the minimum at which it can generate. The spot values of declared minimum availability i. e. the lowest output at which a generator can generate at a moment in time The profiled value of the outturn minimum stable generation values Minimum Output (zero for all units except PS) The T&SC term "Minimum Generation" is renamed “Lower Registered Output". New glossary definition. Change VTOD parameter in T&SC to "Minimum Generation". Change Glossary definition of Minimum Generation to correctly define this parameter No change required Correct Glossary definition. No change required Change proposed Lower Registered Output: means the minimum level of Output at which a Generator Unit may operate submitted for the Generator Unit in accordance with Appendix H: "Participant and Unit Registration and Deregistration". Lower Registered Output is zero except for Pumped Storage Units, for which the Lower Registered Output shall be equal to the pumping capability. Minimum Generation means the minimum MW Output which a Generator Unit can generate continuously. Minimum Stable Generation means the time weighted average Outturn Minimum Stable Generation for each Trading Period within the Trading Day for a Generator Unit, calculated as described in Section 4. 49.

Single Ramp up Rate – proposed changes The Single Ramp up Rate calculation is: If max(AAuh) <= Min. Gen. TOD then (Max. Gen. TOD – max(min(Minimum Stable Generation), Min. Gen. TOD))) /Ramp. Up. Time else (max(AAuh) – max(min(Minimum Stable Generation), Min. Gen. TOD))) /Ramp. Up. Time And similarly for the Single Ramp Down Rate.