Keeping the lights burning
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Keeping the lights burning
HVDC (high-voltage direct-current) technology offers an excellent opportunity to support and improve the power supply for today’s growing and increasingly energy-hungry metropolitan areas. One example is New York: Solutions from Siemens are contributing to keeping the city’s power-supply infrastructure stronger and more reliable in the face of growing demand.
Keeping the lights burning
New York City keeps growing. According to a press release from the Office of the Mayor, the city’s population increased by about two percent from 2010 to 2012, and U.S. census data issued in March 2013 indicate that the city’s population has reached an all-time-record of 8,336,697. As reported by the U.S. Energy Information Administration, the megacity, a world-leading center of commerce, finance, media, fashion, and entertainment – has the second-lowest electricity consumption per capita of all U.S. cities. Still, its power demand is enormous – and that power supply needs to be secured today and even more so tomorrow.
Electrical power is essential to the bustling life in today’s megacities around the world. For example, a single day without power would cost New York City around $1bn, according to a research project conducted by Arup, RPA – America’s oldest independent urban research and advocacy organization – and Siemens. Without a doubt, similar figures can be assumed for other metropolitan areas.
Siemens provides a wide range of AC and DC power transmission solutions that ensure a reliable power supply for centers of consumption of any size. New York City, for instance, benefits from two powerful HVDC systems from Siemens.
The Hudson River and the Manhattan skyline.
Hotel manager Jennifer Rhoda knows that virtually all modern business processes rely on electrical power.
TV producer Diedra Wesley points out how important a reliable power supply is for her industry.
»If there's no reliable power supply, there's no business,« says coffee shop owner Ricardo Costa.
James Sullivan enjoying the view of the Manhattan skyline.
The HVDC station in Ridgefield, New Jersey, was constructed by Siemens as a turnkey project.
The Hudson Project is an HVDC back-to-back link that connects the power supply networks of New Jersey and New York City.
The valve hall of the HVDC system is where the power is made ready for transmission.
The thyristor valves are the heart of the HVDC transmission system. They enable the conversion of AC to DC and vice versa.
Eric Fullerton, North American HVDC O&M Manager, Siemens.
James Sullivan, Vice President of Operations, and Chris Hocker, Vice President of Planning, PowerBridge.
New York City keeps growing, and so does its power demand.
Siemens recently completed the Hudson Project, an HVDC back-to-back link to connect the power supply networks of New Jersey and New York. It is now possible to transmit an additional 660 megawatts of controlled electric power into New York City via a high-voltage cable link crossing the Hudson River from New Jersey. One megawatt is enough electricity to meet the power needs of 800 to 1,000 typical homes.
The power link, which connects New York City to the North American power market, commenced operation in June 2013, just in time to support the city’s power system during the hot days of summer, when power demand peaks due to the extensive use of air-conditioning and cooling systems.
The station hosting the HVDC back-to-back link was built as a turnkey project in Ridgefield, New Jersey. It is connected via a substation with New Jersey's 230-kV power supply network. A 345-kV high-voltage cable spanning a total distance of twelve kilometers, part of which lies underwater in the Hudson River, provides the connection to the point where the power is fed into New York's system. The infeed point is located on 49th Street in Manhattan.
Siemens' scope of supply included the open- and closed-loop controls for the HVDC system, the thyristor valves, eight converter transformers, and the AC filters. Siemens and the owner of the system, Hudson Transmission Partners, LLC of Fairfield, Connecticut, have also concluded an operation and maintenance contract for five years.
The Hudson Transmission Project is the second power highway Siemens has built to boost the power supply of the New York megacity. Siemens previously installed an HVDC link between New Jersey and Long Island that was commissioned in late June 2007. This HVDC submarine cable link, also known as the Neptune project, consists of a 105-kilometer undersea and underground HVDC interconnector between Sayreville, New Jersey and Nassau County, Long Island. It transmits 660 MW of electrical power at a transmission voltage of 500 kV – enough energy for 600,000 homes. The transmission system provides a low-loss, eco-friendly power link between New Jersey's power supply network and Long Island. It also enables the system owner, Long Island Power Authority (LIPA), to access one of the most diverse and competitively-priced power markets in the United States.
Innovative HVDC solutions have the potential to cope with the new challenges of the energy system, such as the efficient transmission of bulk volumes of green power over long distances, and enabling dedicated power exchange between power grids. By means of power electronics, Siemens HVDC systems increase transmission capacity and provide fast and powerful features that improve system stability and help prevent cascading disturbances.
Discover the answers Siemens delivers for the Power Matrix.