quinta-feira, 21 de abril de 2011

Regulation and Alternative Energy Sources

The article from the Star Advertiser "Power Struggle Plays Out" talks about the regulation challenge for a decentralized energy model.

According to Hawaii's electricity regulation, when the amount of photovoltaic (PV) on a circuit reaches 15 percent of the total capacity, Hawaiian Electric Company (HECO) requires the homeowner or business seeking to install the system to conduct an interconnection study. The specter of having to do the costly study kills new projects. This study aims to determine how any particular project exceeding the threshold will affect other customers on the circuit.

According to PV contractors, there is room to double the number of projects but for this regulation restriction.

15 percent trigger point has been reached or exceeded on 11 of the island's 465 circuits, 18 of the 140 on the Big Island, and 3 of the 90 on Maui.

15 percent is also used by utilities in California. This level is recommended by the Institute of Electricity and Electronic Engineers. It is argued that this regulation is needed to protect the integrity of the grid ans alternative energy sources such as solar power are intermittent in nature. This can have a negative impact on HECO's effort to balance the load on its grid.

http://www.staradvertiser.com/business/20110417__Power_struggle_plays_out.html

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