if our grade generation capacity is 7000 MW, how much MW from renewable energy such solar can this network absorbs?
For sure, you will connected renewables on power system gradually. Share of connected renewables at beginning will be few percentages and after several years, percentage will be high. This percentage highly depend on fees for renewables in first period. Renewable can be dominantly in solar, Photovoltaic, PV but also can be expected some wind power plants. Study works must be done for each phase, for example 10% integration, 20%, 30%, 40%, 50%, ….. Full attention must be on control features in dispatch center and regulations facilities (conventional power plant, new high speed gas turbine, battery storage, demand side response, …). Automatic generation control should be upgrade and it should be look maybe to unify these controls between few countries. On that, way it can regulations control and reserves can be exchange between few power systems in different countries. Forecast tool and applications must be developed and implemented immediately in control room. Finally, answer to your question can be example of Germany or Denmark. In some period of days or whole day, they have complete consumption feed from renewables (dominantly it is wind production). Therefore, it is possible to have high percent integration of solar but you must have proper control and forecast tools and regulations possibilities.
Shortly
Depends of Power system and its capabilities that it has operational reserve in the basic power plant to cover the loss of all renewables.
yes, this important point. we should have renewable energy equivalent to the reserve power in the power plant. my concern question how much power from renewable can be absorb by the normal network. for example if we have our full capacity is 5000 MW, we looking to benefit from renewable energy by turning off 3000 MW at daylight or we can not have this possibility? according to your answers the percentage of renewable energy which can be integrated to the network depends strongly on the strength of the infrastructure of the network itself, I'm right or not?
I think there are constraints on the percentage of MW electric from renewable energy in the electricity generation mix. These constraints include:
1) Mandates from the federal government on what should be the electricity mix (renewable vs. non-renewable sources).
2) Whether renewable energy is subsidized by the government. The reason here is that electricity prices (cents/kWh) from renewable sources cannot compete with cost of electricity from the mature non-renewable sources such as burning natural gas for electricity generation.
3) How much the electricity consumers are willing to pay per kWh for electricity generation from renewable sources.
4) Long-term strategies of the utilities that own generation units.
5) Availability of energy storage technologies that be integrated with the renewable energy sources to offset their intermittency (e..g., solar PV and wind turbines).
Hope this helps answer your question and good luck!
I tested IEEE ten generator system with varying RERs penetration starting from 15% to 40 % there is drastical impact on the thermal generators with 40 % RERs penetration ( Unit Commitment) only two thermal generators were required to cater the updated load demand ,I concluded that without proper policy making the penetration levels must not be increased or specific reserve limit must be kept as a percentage share of RERs ,because minimum up/ down constraint of thermal generators will make the situation severe if RERs penetration goes down. Moreover the ramp rate limits on RERs must be kept
In Spain, and for some years now, more than 40% of the used electricity is obtained from renewable energies. In 2018 an additional 23,500 MW of photovoltaic production have been authorized to be connected to the net; this will add a 20% of the used energy (for a total of 60%). How much more can be connected? I do believe that up to a 100% of the electricity needed.
To this end the eolic/photovoltaic plants need to be connected to pumpable hydraulic plants. In this manner, there will be no need for conventional plants to be connected when there is no production by renewable ones. In Spain there are several pumpable hydraulic plants e.g. “Cortes de Payas” with a capacity of 1.7 GW
https://www.iagua.es/noticias/espana/spancold/15/04/28/balsa-muela-cortes-pallas-mayor-central-bombeo-europa
Pumpable plants allow instantaneous response to the demands of the system. They are the best option to achieve a completely renewable system.
How can we achieve a 100% production by renewable energy? This is a problem that lies more with politicians, big electric companies and even media, which often introduce erroneous ideas or information to the general public.
The actual price of kWh produced by renewables is equal, or even lower, that those produced by coal, gas, or nuclear plants. And that is true even without considering the health and environmental costs that almost never are included in the price.
From my point of view the only intelligent future approach is work with this formula: photovoltaic + eolic + other renewables + pumpable.
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