A basic characteristic of the renewable energy sources wind and solar is that

A basic characteristic of the renewable energy

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A basic characteristic of the renewable energy sources (wind and solar) is that they are variable in nature. The following charts show the national dispatch in each scenario on 18 th May, 2046 with maximum variability (i.e. maximum hour to hour variation) in RE generation.It can be seen, both solar and wind are showing maximum variability from 0900 hrs till 1400 hrs. Significantly high capacity of RE inspite of variability in case of high RE scenario requires the conventional plants to back down to minimum in the afternoon with substantial RE curtailment. In case of medium and low RE, there is enough conventional capacity in the grid and no curtailment of RE is needed. Figure 13b. Hourly National Dispatch for Max RE Variability Day (May 18th) – High RE Scenario 0 200 400 600 800 1000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Generation (GW) Coal Gas_CCGT Nuclear Hydro Biomass+Cogen Hydro_Small Wind Solar Waste to Electricity Hour of the day RE Curtailment
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Figure 13b. Hourly National Dispatch for Max RE Variability Day (May 18th) – Medium RE Scenario Figure 13b. Hourly National Dispatch for Max RE Variability Day (May 18th) – Low RE Scenario 92 0 200 400 600 800 1000 1 3 5 7 9 11 13 15 17 19 21 23 Generation (GW) Coal Gas_CCGT Nuclear Hydro Biomass+Cogen Hydro_Small 0 200 400 600 800 1000 1 3 5 7 9 11 13 15 17 19 21 23 Generation (GW) Coal Gas_CCGT Nuclear Hydro Biomass+Cogen Hydro_Small Hour of the day Hour of the day
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93 3.5.3. Maximum Load Day Insight: The following charts show the national dispatch for the maximum load day which is 3 rd June, 2046 in each scenario.In case of High RE scenario, even in case of high load, we can still see some curtailment of RE because of the limited ability of the conventional system to back down completely. Since the max load day is on 3 th June, 2046, both solar and wind are high. In case of Low RE scenario, maximum load is met through coal, gas and nuclear 0 200 400 600 800 1000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Generation (GW) Coal Gas_CCGT Nuclear Hydro Biomass+Cogen Hydro_Small Wind Solar Waste to Electricity RE Curtailment Figure 13c. Hourly National Dispatch for Max Load Day (June 3rd) – High RE Scenario Hour of the day
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Figure 13c. Hourly National Dispatch for Max Load Day (June 3rd) – Medium RE Scenario Figure 13c. Hourly National Dispatch for Max Load Day (June 3rd) – Low RE Scenario 0 200 400 600 800 1000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Generation (GW) Coal Gas_CCGT Nuclear Hydro Biomass+Cogen Hydro_Small Wind Solar Waste to Electricity 0 200 400 600 800 1000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Generation (GW) Coal Gas_CCGT Nuclear Hydro Biomass+Cogen Hydro_Small Wind Solar Waste to Electricity Hour of the day Hour of the day 94
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95 3.5.4. Minimum Load Day Insight: The following charts show the national dispatch for the minimum demand day which is 13 th Dec, 2046 in each scenario. In case of low demand day, we can see potential renewable energy over-generation and some curtailment is needed in case of high RE scenario.
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