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Response to kristopher (Reply #4)

Sun Dec 8, 2013, 10:35 AM

5. Storage Is The Key

Wind and PV cause stability problems to the grid. The variable nature of both forms of energy create oscillations in the grid that have to be overcome with another generator. The term is called spinning reserve. For renewables to work with you need another solid generation source that does not vary. Right now Coal, Nuclear and Natural Gas are the prim generation. Oak Ridge labs (UTK) did a study for DOE that did not favor wind when a Coal Generator is used for spinning reserve. Large Energy storage will prevent the need for a back up from an unclean energy. Another issue that can be overcome with storage is to much generation during off peak times. Turbines have to be locked down because the cause high voltage in the transmission system. In many cases expensive Flexible AC Transmission devices have to be installed such as Static Var Compensator's to regulate voltage and reactive power flow. Storage will prevent the need for spinning reserve and reactive power mitigation.

Just these two factors make Wind far more expensive then Coal or Combustion Turbines with Natural Gas. You cant just look at the coast of the turbine but the additional cost for the renewable to do no harm to the grid. Total capital cost is what drives the installation price.If wind were cheaper then Utilities would be rushing to add Turbines to the grid instead of Natural gas CT units. Storage is the key to economic and environmental success of wind and PV.

Strategic energy storage not only will help lower generating price but dramatically lower carbon output.

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kristopher Dec 2013 OP
bloomington-lib Dec 2013 #1
randr Dec 2013 #2
Searay60 Dec 2013 #3
kristopher Dec 2013 #4
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