Difference between revisions of "Flexibility (Power System)"

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= Flexibility: Why It Matters =
 
= Flexibility: Why It Matters =
  
There are many services the operators of a power system must consider to make the grid stable. Renewable sources, together with some battery storage, can already perform some of these services better than a conventional power system<ref>"Powering into the Future: Renewable Energy & Grid Reliability". Available at: http://www.mjbradley.com/sites/default/files/Powering_Into_the_Future.pdf</ref>. For example, renewable sources can supply reactive power (and therefore voltage response) even when they are not giving real power, and batteries can perform frequency response better than conventional sources.
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There are many services the operators of a power system must consider to make the grid stable. Renewable sources, together with some battery storage, can already perform some of these services better than a conventional power system<ref>"Powering into the Future: Renewable Energy & Grid Reliability". Available at: http://www.mjbradley.com/sites/default/files/Powering_Into_the_Future.pdf</ref>. For example, renewable sources can supply reactive power (and therefore voltage response) even when they are not giving real power, and batteries can perform frequency response better than conventional sources<ref>http://reneweconomy.com.au/tesla-big-battery-moves-from-show-boating-to-money-making-93955/</ref>.
  
 
However, current capacity of dispatchable renewables or batteriers is not enough to cover variations of the residual load curve. So flexibility of a power system must still be performed mainly by conventional dispatchable sources, with the aid of some demand response.
 
However, current capacity of dispatchable renewables or batteriers is not enough to cover variations of the residual load curve. So flexibility of a power system must still be performed mainly by conventional dispatchable sources, with the aid of some demand response.

Revision as of 04:52, 23 January 2018

Flexibility: Concept Definition

According to the International Energy Agency, the flexibility of a power system refers to "the extent to which a power system can modify electricity production or consumption in response to variability, expected or otherwise"[1]. Another source described it as "the modification of generation injection and/or consumption patterns in reaction to an external signal (price signal or activation) in order to provide a service within the energy system" [2].

Flexibility: Why It Matters

There are many services the operators of a power system must consider to make the grid stable. Renewable sources, together with some battery storage, can already perform some of these services better than a conventional power system[3]. For example, renewable sources can supply reactive power (and therefore voltage response) even when they are not giving real power, and batteries can perform frequency response better than conventional sources[4].

However, current capacity of dispatchable renewables or batteriers is not enough to cover variations of the residual load curve. So flexibility of a power system must still be performed mainly by conventional dispatchable sources, with the aid of some demand response.

Flexibility: Supply Side

Flexibility: Demand Side

Ways to Improve Flexibility

  1. International Energy Agency (IEA), Harnessing variable renewables., Tech. rep.;fckLR2011
  2. "Flexibility and Aggregation Requirements for their interaction in the market". Available at:fckLRhttp://www.eurelectric.org/media/115877/tf_bal-agr_report_final_je_as-2014-030-0026-01-e.pdf
  3. "Powering into the Future: Renewable Energy & Grid Reliability". Available at: http://www.mjbradley.com/sites/default/files/Powering_Into_the_Future.pdf
  4. http://reneweconomy.com.au/tesla-big-battery-moves-from-show-boating-to-money-making-93955/