How We Do It in MISO
How We Do It in MISO
How We Do It in MISO
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Fundamental Issue<br />
.<br />
• No <strong>in</strong>crease <strong>in</strong> the conventional reserve requirement<br />
• What is the most challeng<strong>in</strong>g issue <strong>in</strong> the day to day<br />
operation<br />
– Ramp<strong>in</strong>g Capability<br />
• Keep<strong>in</strong>g enough rampable capacity <strong>in</strong> the system to go after the net load<br />
variability and uncerta<strong>in</strong>ty<br />
– Enforc<strong>in</strong>g system wide Ramp Up and <strong>Do</strong>wn capacity constra<strong>in</strong>ts <strong>in</strong> the<br />
Day Ahead process (partly cover<strong>in</strong>g <strong>in</strong>tra-hour ramp requirements)<br />
– Intra Day RAC process updates commitment of the generation<br />
resources to make sure upon changes <strong>in</strong> the system conditions there is<br />
enough headroom <strong>in</strong> the system<br />
– Follow<strong>in</strong>g the ramp needs close to the real-time and committ<strong>in</strong>g fast<br />
start up units if needed<br />
– Enforc<strong>in</strong>g an offset value <strong>in</strong> the dispatch function partly to enforce<br />
specific position<strong>in</strong>g of the units<br />
6
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