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There are three minor power grids in North America: the Alaska Interconnection, the Texas Interconnection, and the Quebec Interconnection. The Eastern, Western and Texas Interconnections are tied together at various points with DC interconnects allowing electrical power to be transmitted throughout the contiguous U.S., Canada and parts of Mexico.
The Electric Reliability Council of Texas (ERCOT) manages the flow of electric power on the Texas Interconnection that supplies power to 26 million Texas customers – representing 90 percent of the state's electric load. [3] ERCOT is the first independent system operator (ISO) in the United States [4] and one of nine ISOs in North America. [5]
Interconnections can be tied to each other via high-voltage direct current power transmission lines such as the north-south Pacific DC Intertie, or with variable-frequency transformers (VFTs), which permit a controlled flow of energy while also functionally isolating the independent AC frequencies of each side.
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As a result, 85% [2] of Texas power consumers (those served by a company not owned by a municipality or a utility cooperative) could choose their electricity service from a variety of retail electric providers (REPs), including the incumbent utility. The incumbent utility in the area still owns and maintains the local power lines (and is the ...
New map projections are still being developed, university map collections, such as Perry–Castañeda Library Map Collection at the University of Texas, offer better and more diverse maps and map tools every day, making available for their students and the broad public ancient maps that in the past were difficult to find.
Afro-Iranians (Persian: ایرانیان آفریقاییتبار) refers to Iranian people with significant black ancestry. Most Afro-Iranians are concentrated in the southern provinces of Iran, including Hormozgan, Sistan and Balochistan, Bushehr, Khuzestan, and Fars.
Iranian Americans, also known as Persian Americans, are United States citizens or nationals who are of Iranian ancestry, or who hold Iranian citizenship.. Most Iranian Americans arrived in the United States after 1979, as a result of the Iranian Revolution and the fall of the Iranian monarchy, with over 40% settling in California, specifically Los Angeles.