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61-492: VFT , an abbreviation, may refer to: Variable frequency transformer , a type of electricity transformer Venus Flytrap , a variety of carnivorous plant Vertical fire-tube boiler , a heat-transfer device used in steam engines Very Fast Train , a proposed high-speed railway in Australia Virtual field trip , a method used in online education Virtual function table ,

122-513: A 100 MW variable-frequency transformer in 2004 to connect the asynchronous grids in Québec and the northeastern United States . This was the first large scale, commercial variable frequency transformer, and was installed at Hydro-Québec Langlois substation and is located electrically near sixteen hydro generators at Les Cèdres, Quebec and thirty-six more hydro generators at Beauharnois, Quebec . The operating experience since April 2004 has demonstrated

183-699: A financial instrument used to balance energy congestion and demand costs. Northeastern United States The Northeastern United States (also referred to as the Northeast , the East Coast , or the American Northeast ) is one of the four census regions defined by the United States Census Bureau . Located on the Atlantic coast of North America , the region borders Canada to its north,

244-690: A governor. Massachusetts and New Hampshire also shared a governor for some time. The beginnings of the American Revolutionary War would be in the Northeast, specifically in Massachusetts. The Battles of Lexington and Concord in northeast of Boston would be the first military engagements between the Revolutionaries and the British. Many of the major battles of the revolution would be fought in

305-588: A mechanism used in programming language Vogel–Fulcher–Tammann equation , an equation used to describe the viscosity of liquids as a function of temperature Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title VFT . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=VFT&oldid=1209904045 " Category : Disambiguation pages Hidden categories: Short description

366-414: A vertical shaft hydroelectric generator with a three-phase wound rotor , connected by slip rings to one external power circuit. The stator is connected to the other. With no applied torque, the shaft rotates due to the difference in frequency between the networks connected to the rotor and stator. A direct-current torque motor is mounted on the same shaft; changing the direction of torque applied to

427-401: Is different from Wikidata All article disambiguation pages All disambiguation pages Variable frequency transformer It can be thought of as a very high power synchro , or a rotary converter acting as a frequency changer , which is more efficient than a motor–generator of the same rating. A variable-frequency transformer is a doubly fed electric machine resembling

488-490: Is home to the Northeast megalopolis , which includes many of the nation's largest metropolitan areas, including Boston , New York City , and Philadelphia . The megalopolis makes up 67% of the region's total population of 57,609,148. The gross domestic product of the region was $ 5.1 trillion as of 2022 and contains some of the most developed states based on the Human Development Index , with every state with

549-573: Is now the eastern United States . Among the many tribes inhabiting this area were those that made up the Iroquois nations and the numerous Algonquian peoples . In the United States of the 21st century, 18 federally recognized tribes reside in the Northeast. For the most part, the people of the Northeastern Woodlands, on whose lands European fishermen began camping to dry their codfish in

610-492: The 2020 U.S. census , the population of the region was 57,609,148, representing 17.38% of the nation's total population. With an average of 345.5 people per square mile, the Northeast is 2.5 times as densely populated as the second-most dense region, the South . Since the last century, the U.S. population has been shifting away from the Northeast and Midwest toward the South and West . The region's racial composition as of 2020

671-647: The Atlantic coastal plain , which extends south to the southern tip of Florida . The coastal plain areas include Cape Cod in Massachusetts, Long Island in New York, and most of New Jersey , and are generally low and flat with sandy soil and marshy land. The highlands, including the Piedmont and the Appalachian Mountains, are heavily forested, ranging from rolling hills to summits greater than 6,000 feet (1,800 m), and pocked with many lakes. The highest peak in

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732-735: The Battle of Yorktown in Virginia. The idea of an independent United States of America, with the designs of its government would be created primarily in the Northeast in a series of declarations, constitutions, and documents. The Continental Congresses would meet in Philadelphia, which would produce the Declaration of Independence and the Articles of Confederation . Following the American Revolution,

793-553: The English colonial empire . The territory became the colonies of New York and New Jersey . New Jersey was originally split into East Jersey and West Jersey until the two were united as a royal colony in 1702. New England played a prominent role in early American education. Starting in the 17th century, the larger towns in New England opened grammar schools , the forerunner of the modern high school . The first public school in

854-505: The Mid-Atlantic states of New Jersey, New York, and Pennsylvania. This definition has been essentially unchanged since 1880 and is widely used as a standard for data tabulation. The U.S. Census Bureau has acknowledged the obvious limitations of this definition and the potential merits of a proposal created after the 1950 census, that would include changing regional boundaries to include Delaware , Maryland , and Washington, D.C. with

915-711: The Southern United States to its south, the Midwestern United States to its west, and the Atlantic Ocean to its east. The Northeast is one of the four regions defined by the U.S. Census Bureau for the collection and analysis of statistics. The Census Bureau defines the region as including the six New England states of Connecticut , Maine , Massachusetts , New Hampshire , Rhode Island , and Vermont , and three northern Mid-Atlantic states of New Jersey , New York , and Pennsylvania . The region

976-512: The capital of the newly formed United States would move around in the states of Pennsylvania , New Jersey , and New York . It was based in New York City from 1785 until 1790, when it was moved to Congress Hall in Philadelphia , where it remained for a decade, until 1800, when the construction of the new national capital of Washington, D.C. was completed. The Constitutional Convention

1037-517: The current-carrying capacity of the slip rings for the rotor winding. Five small variable-frequency transformer with a total power rate of 25 MVA were in use at Neuhof Substation , Bad Sachsa, Germany for coupling power grids of former East and West Germany between 1985 and 1990. Langlois Substation in Québec , Canada ( 45°17′13.76″N 74°0′56.07″W  /  45.2871556°N 74.0155750°W  / 45.2871556; -74.0155750 ) installed

1098-494: The humid subtropical zone ( Cfa/Do ) begins at Martha's Vineyard and extreme SW Rhode Island and extends southwestward down the coastal plain to central and southern Maryland. The oceanic climate zone ( Cfb/Do ) only exists on Block Island , Nantucket , and the far coastal islands of Maine. It is the only area of the Northeast where all months average between 0 and 22 °C (32 and 72 °F). Cape Cod borders this zone and warm-summer humid continental ( Dfb/Dc ). As of

1159-526: The "Northeastern Woodlands" as one of the cultural regions that existed in the Western Hemisphere at the time of European colonists in the 15th and later centuries. Most did not settle in North America until the 17th century. The cultural area, known as the " Northeastern Woodlands ", in addition to covering the entire Northeast U.S., also covered much of what is now Canada and others regions of what

1220-519: The 1960s. New York state lost its claim to being the most populated state after it was surpassed by California in the 1970s. Some Northeastern cities, including New York City, have recovered from its decline in the mid-20th century. Many new information and service industries have risen in the northeast, which has led to a boom in the 21st century in some cities in the Northeast like Boston, New York, and Philadelphia. Some other cities like Hartford , Syracuse, and Buffalo still are declining though in

1281-463: The 21st century, a large industrial decline in the Northeast resulted in a depopulation of many Northeastern cities, many of which had not yet recovered from it into the 21st century. This led to the rise of programs of urban renewal and demolition of large parts of Northeastern cities during the mid and late 20th century. There has also been a large population shift to the Sun Belt states starting in

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1342-464: The 21st century. Hurricane Sandy would impact much of the northeast in 2012, severely damaging much of the coast and causing flooding inland. The hurricane would directly impact New Jersey and caused large amounts of flooding in New York City. Although the first settlers of New England were motivated by religion, since the 21st century, New England had become one of the least religious parts of

1403-580: The American involvement in both World Wars, the Northeast would become a large base of war production, with the Brooklyn Naval Yard producing many navy ships. Many worker strikes would occur in the states, including the Homestead strike in 1892. Many of these cities would see a peak population and industrial output in the aftermath of World War II in the 1950s. Starting in the 1950s and continuing into

1464-589: The Appalachians partially protect these locations from the extreme cold coming from the west and the interior of North America. The basic climate of the Northeast can be divided into a colder and snowier interior, including western Maryland, most of Pennsylvania, most of North Jersey , Upstate New York , and most of New England, and a milder coastal plain region from Cape Cod and southern Rhode Island southward, including Long Island , Southern Connecticut , New York City , central and southern New Jersey , part of

1525-520: The English colonies was the Boston Latin School , founded in 1635. In 1636, the colonial legislature of Massachusetts founded Harvard College , the oldest institution of higher learning in the United States. In 1681, William Penn , who wanted to give Quakers a land of religious freedom, founded Pennsylvania and extended freedom of religion to all citizens. Penn strongly desired access to

1586-562: The Mid-Atlantic states, but ultimately decided that "the new system did not win enough overall acceptance among data users to warrant adoption as an official new set of general-purpose State groupings. The previous development of many series of statistics, arranged and issued over long periods of time on the basis of the existing State groupings, favored the retention of the summary units of the current regions and divisions." The U.S. Census Bureau confirmed in 1994 that it would continue to "review

1647-524: The Northeast and Midwest and would become prominent towards the mid-19th century, these groups advocated the shrinking or banning of slavery in the United States. Some Northeastern states still had small amounts of slaves into the 1850s, though some would ban it during the decade. The election of 1860 led to the start of the Civil War; southern states seceded from the United States in late-1860 and early-1861. States like Maryland and Delaware would remain in

1708-509: The Northeast is Mount Washington in New Hampshire at 6,288 feet (1,917 m). As of 2012 , forest-use covered approximately 60% of the Northeastern states, including Delaware, Maryland, and Washington, D.C., about twice the national average. About 11% was cropland and another 4% grassland pasture or range. There is also more urbanized land in the Northeast (12%) than any other region in

1769-501: The Northeast, and frequent (but brief) thundershowers are common on hot summer days. In winter, the subtropical high retreats southeastward, and the polar jet stream moves south bringing colder air masses from up in Canada and more frequent storm systems to the region. Winter often brings both rain and snow as well as surges of both warm and cold air. In the southern part of the Northeast from coastal Rhode Island southwest to eastern Maryland,

1830-568: The Northeast. The British would evacuate Boston in early-1776 and would move to capture New York City . The revolutionaries were pushed to the Delaware River before suddenly moving forward against the British in the Battles of Trenton and Princeton . A stalemate was reached in 1778, between the British and American Revolutionaries and continued until the end of the war in 1783. The war would move to southern states and eventually conclude with

1891-688: The Northeastern United States in somewhat different ways. The Association of American Geographers divides the Northeast into two divisions: "New England", which is the same as the Census Bureau; and it has the same "Middle States" but adds Delaware. Similarly, the Geological Society of America defines the Northeast as these same states but with the addition of Maryland and the District of Columbia . The narrowest definitions include only

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1952-550: The Northeastern region have distinct histories. The first European explorer known to have explored the Atlantic shoreline of the Northeast since the Norse was Giovanni da Verrazzano in 1524. His ship La Dauphine explored the coast from what is now known as Florida to New Brunswick. The first Europeans to settle and colonize New England were Pilgrims from England , who landed in present-day Massachusetts in 1620. The Pilgrims arrived on

2013-583: The Pennsylvania portion of the Delaware Valley including Philadelphia , Delaware , and most of Maryland . In the latter region the hardiness zone ranges from 7a to 8a. Annual mean temperatures range from the low-to-mid 50s F from Maryland to southern Connecticut, to the 40s F in most of New York State, New England, and northern Pennsylvania. Most of the Northeast has a humid continental climate ( Dfa/Dfb/occasional Dfc/Dc ). The northernmost portion of

2074-697: The U.S. Many parks on a state and national level cover the inland parts of the region. Large parks include the Adirondack Park in northeastern New York, Green Mountain National Forest in Vermont, White Mountain Forest in northern New Hampshire, Baxter State Park in northern Maine, Acadia National Park on the eastern coast of Maine, Allegheny National Forest in northwestern Pennsylvania, and Catskill Park in southern New York. There are also some parks closer to

2135-581: The United States (western and Northeastern states) and the Confederacy (southeastern states). The admission of Maine as a free state in exchange for Missouri becoming a slave state as part of the Missouri Compromise in 1820 would settle the final boundaries of the Northeastern states. The Mason-Dixon line would be established as the border of slavery, following the border of Pennsylvania and Delaware/Maryland. Abolitionist movements would start in

2196-503: The United States during the war, conflicts did arise, like the New York draft riots in 1863. The war would end in 1865 with the United States taking back control of Southern states. Following the Civil War, the Northeast would see a large economic boom and would become one of the most industrialized regions in the world. Many technological innovations would be made in the Northeast during this time. The Second Industrial Revolution would see

2257-700: The United States. The War of 1812 would see less fighting in the Northeast and instead more fighting in western and southern areas. A failed invasion of Canada and the occupation of Maine would be some of the major conflicts during the war. The war would end in 1815 and most of the Northeast has not seen any major conflict since then. The American Industrial Revolution was launched in Blackstone Valley in Rhode Island and Massachusetts , where textile mills spread across New England, and in eastern Pennsylvania , where coal, steel, and industrialization launched

2318-557: The United States. In a 2009 Gallup survey, less than half of residents in Maine , Massachusetts , New Hampshire , and Vermont reported religion as an important part of their daily life. In a 2010 Gallup survey, less than 30% of residents in Vermont, New Hampshire, Maine, and Massachusetts reported attending church weekly, giving them the lowest church attendance among U.S. states. The vast area from central Virginia to northern Maine , and from western Pennsylvania , from Pittsburgh in

2379-673: The VFT's inherent compatibility with the nearby generators AEP Texas installed a 100 MW VFT substation in Laredo , Texas, United States ( 27°34′13.64″N 99°30′34.98″W  /  27.5704556°N 99.5097167°W  / 27.5704556; -99.5097167 ) in early 2007. It connects the power systems of ERCOT (in the United States) to CFE (in Mexico). (See The Laredo VFT Project .) Smaller VFTs are used in large land-based wind turbines , so that

2440-557: The area became known as New Netherland . In 1625, the city of New Amsterdam (the location of present-day New York City) was designated the capital of the province. The Dutch New Netherland settlement along the Hudson River and, for a time, the New Sweden settlement along the Delaware River divided the English settlements in the north and the south. In 1664, Charles II of England formally annexed New Netherland and incorporated it into

2501-599: The components of the regions and divisions to ensure that they continue to represent the most useful combinations of states and state equivalents." Many organizations and reference works follow the Census Bureau's definition for the region. In the history of the United States, the Mason–Dixon line between Pennsylvania ( the North ) and Maryland ( the South ) traditionally divided the regions, but in modern times, various entities define

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2562-543: The early 1600s, lived in villages, especially after being influenced by agricultural traditions of the Ohio and Mississippi valley societies. All of the U.S. states making up the Northeastern region were among the original Thirteen Colonies , though Maine and Vermont were part of other colonies before the United States became independent in the American Revolution . The two cultural and geographic regions that form parts of

2623-467: The exception of Maine above the national average. It is also the most densely populated region in the United States, with 320 people per square mile (120 people/km ). The U.S. Census Bureau defines the Northeast United States as having a total area of 181,324 sq mi (469,630 km ), making it the smallest region of the United States by total area. Anthropologists recognize

2684-764: The nation's manufacturing sector. After the end of the War of 1812, industry boomed in the Northeast in the early and middle parts of the 19th century. With the construction of railroad and canals crossing the northeast and the rise of western territories and resources from the south, the Northeast experienced the development of new industries and a fast-growing population. Many of the coastal cities, including Boston , New York City , and Philadelphia , served as ocean trade ports for American goods. Cities, including Allentown , Buffalo , Pittsburgh , Rochester , and Syracuse , were settled and emerged as major industrial centers. By 1860, New York City, based on its present-day boundaries,

2745-405: The northeast grow massively, even more so than before the Civil War. Many cities in the Northeast would explode in population, with cities like Philadelphia and New York climbing over one million people, while other cities like Buffalo, Boston, and Pittsburgh would rise above half a million during this time. New York City eventually grew to become one of the largest cities in the world by 1900. With

2806-469: The region. The climate of the Northeastern United States varies from northernmost state of Maine to its southernmost state in Maryland . The region's climate is influenced by its positional western to eastern flow of weather in the middle latitudes in the United States. Summers are normally warm in northern areas to hot in southern areas. In summer, the building Bermuda High pumps warm and sultry air toward

2867-571: The revolution the Northeast would see small skirmishes like the Whiskey Rebellion in western parts of Pennsylvania. Many northeastern states would continue trading with the British and other European powers. Tensions between the United States and Europe (specifically Britain) would sour in the lead up to the War of 1812 . This caused certain trade merchants to meet in Hartford to propose succeeding from

2928-618: The sea for the Province of Pennsylvania and leased what then came to be known as the "Lower Counties on the Delaware" from the Duke . Penn established representative government and briefly combined his two possessions under one General Assembly in 1682. By 1704, the province of Pennsylvania had grown so large that their representatives wanted to make decisions without the assent of the Lower Counties and

2989-404: The shaft changes the direction of power flow. The variable-frequency transformer behaves as a continuously adjustable phase-shifting transformer . It allows control of the power flow between two networks. Unlike power electronics solutions such as back-to-back HVDC , the variable frequency transformer does not demand harmonic filters and reactive power compensation. Limitations of the concept are

3050-480: The ship Mayflower and founded Plymouth Colony so they could practice religion freely. Ten years later, a larger group of Puritans settled north of Plymouth Colony in Boston to form Massachusetts Bay Colony . In 1636, colonists established Connecticut Colony and Providence Plantations . Providence was founded by Roger Williams , who was banished by Massachusetts for his beliefs in freedom of religion, and it

3111-655: The shore, though these are usually smaller and squeezed in-between urbanized areas. These include the Palisades Park in New Jersey, Fire Island in Long Island, and the Cape Cod shoreline in Massachusetts. The Northeast has 72 National Wildlife Refuges , encompassing more than 500,000 acres (780 sq mi; 2,000 km ) of habitat and designed to protect some of the 92 different threatened and endangered species living in

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3172-538: The states of New England. Other more restrictive definitions include New England and New York as part of the Northeast United States, but exclude Pennsylvania and New Jersey. States beyond the Census Bureau definition are included in Northeast Region by various other entities: While most of the Northeastern United States lie in the physiographic region of the Appalachian Highlands , some are also part of

3233-425: The technical feasibility to flow power in both directions between two grids, permitting power exchanges that were previously impossible. Energy in a grid with lower costs can be transmitted to a grid with higher costs (higher demand), with energy trading. Power capacity is sold by providers. Transmission scheduling rights (TSRs) are auctioned by the transmission line owners. Financial transmission rights (FTRs) are

3294-483: The turbine rotation speed can vary while connected to an electric power distribution grid . General Electric installed a 3 × 100 MW VFT substation in Linden, New Jersey , in the United States in 2009. It connects the power systems of PJM & New York Independent System Operator (NYISO). This installation is in parallel with three existing phase-shifting transformers to regulate synchronous power flow. VFTs provide

3355-433: The two groups of representatives began meeting on their own, one at Philadelphia , and the other at New Castle, Delaware . Penn and his heirs remained proprietors of both and always appointed the same person Governor for their province of Pennsylvania and their territory of the Lower Counties. The fact that Delaware and Pennsylvania shared the same governor was not unique. From 1703 to 1738, both New York and New Jersey shared

3416-563: The union, even with slavery still legal. For the first two years, the eastern theater of the war would remain in Virginia and Maryland, but in 1863 the war would reach its northeastern most extent in Gettysburg, Pennsylvania . The Battle of Gettysburg is considered a turning point in the Civil War, seeing the end of the Confederate push northwards. While all Northeastern states would remain in

3477-400: The west to the Atlantic Ocean in the east, have all been loosely grouped into the Northeast. The U.S. Census Bureau 's definition of the Northeast includes nine states: Maine , New York , New Jersey , Vermont , Massachusetts , Rhode Island , Connecticut , New Hampshire , and Pennsylvania . The region is often subdivided into New England , the six states east of New York state and

3538-429: Was 64.42% white , 11.51% African American, 0.51% Native American, 7.25% Asian, 0.04% Pacific Islander, 8.17% from other races, and 8.10% from two or more races. Hispanic or Latino of any race were 15.27% of the population. There were 22,418,883 households and 14,189,719 families in 2021. Of the 22,418,883 households, 27.7% included children under the age of 18. In 2021, the region's the population's age distribution

3599-410: Was held in Philadelphia, where the new United States Constitution was drafted in 1787. 6 of the first 13 states to ratify the new constitution would be in the Northeast, with the last of the original 13, Rhode Island, ratifying the constitution in 1790. Vermont would be admitted in 1791 as the 14th state. The first Congress would convene in Federal Hall in New York City in March 1789. Following

3660-411: Was the first U.S. city to reach a population exceeding one million. Due to the settlement of the Midwest and Great Plains , agriculture would collapse in the Mid-Atlantic and New England, with many farms being abandoned by the end of the century, returning to rural forest. Conflicts with the south over the spread of slavery would become a large factor in the start of the American Civil War, between

3721-452: Was the first colony to guarantee all citizens freedom of worship. Anne Hutchinson , who was also banished by Massachusetts, formed the town of Portsmouth . Providence, Portsmouth and two other towns ( Newport and Warwick ) consolidated to form the Colony of Rhode Island and Providence Plantations . Henry Hudson explored the area of present-day New York in 1609 and claimed it for the Netherlands. His journey stimulated Dutch interest, and

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