Category Archive for: «Transmission and Distribution»

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How Best to Spend $450 Billion on Power Grid

Power Infrastructure Today’s power grid is suffering from a backlog in capital investment. While electrical power demand surged over recent years, electrical industry restructuring left utilities in a state of suspended animation. It is unclear who is responsible to make sure power infrastructure keeps up with demand, and who will benefit. This has left a […]

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5 Technologies to Boost Efficiency in the T&D System

Energy Efficiency in Power System One example of efficiency measures aimed primarily at the utilities that operate the T&D system is an initiative underway at the US Department of Energy to implement new efficiency standards for distribution transformers. These are the grey cylinders you see perched atop utility poles in residential neighborhoods, and the metalhoused […]

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Three Awesome HVDC projects in Australia

Modern HVDC systems combines the good experience of the old installations with recently developed technologies and materials. It is important to remark that an HVDC system not only transmit electrical power from one point to another, but it also has a lot of value added which should have been necessary to solve by another means […]

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Hey Mom, look at that big HVDC Transformer!

Key component HVDC transformers are key components of HVDC stations. HVDC converter and inverter stations terminate long-distance DC transmission lines or DC sea cables. This type of transformer provides the interface between AC grids and high power rectifiers and are used to control the load flow over the DC transmission lines. Design options The design […]

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Location of Current Transformers in HV Substation

Power flow Current transformers are used for protection, instrumentation, metering and control. It is only the first function that has any bearing on the location of the current transformer. In many circuits the power flow can be in either direction and it then becomes necessary to decide which location of fault is most important or likely and to […]

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8 Main Disadvantages of HVDC Transmission

High Voltage Direct Current (HVDC) Few weeks back I posted an article about advantages of HVDC over HVAC transmission systems. Advantages of HVDC are numerous and very well recognized, but like everything on this earth this system has other side too. The eight main disadvantages of HVDC transmission systems, including DC links connecting HVAC systems area, […]

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An overview of Large Power Transformer – LPT (Characteristics, Costs and Pricing)

Tailored to customers’ specifications An LPT (Large Power Transformer) is a large, custom-built piece of equipment that is a critical component of the bulk transmission grid. Because LPTs are very expensive and tailored to customers’ specifications, they are usually neither interchangeable with each other nor produced for extensive spare inventories. Figure 1 illustrates a standard […]

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Comparison of major grid failures in United States and around the world (part 2)

Continued from first part: Comparison of major grid failures in United States and around the world (part 1) A Breakdown of Major Grid Failures by Cause (cont.) Table II – A Breakdown of Major Grid Failures by Cause Main Causes US & Canada Europe International Snow Storm 13 fails 3 fails 3 fails Summer Storms […]

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Comparison of major grid failures in United States and around the world (part 1)

Power Surges The creation and delivery of power is one basic infrastructure expected by all modern industrial societies. Power distribution basics started in the US in the early 1900s when the first AC grid was established. Since 12 independent power grids were completed in the lower 48 states in the mid-1950s, reliability has been a […]

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An overview of South Africa’s energy sector with emphasis on increased demands

Generation, transmission and distribution Electricity provision involves three phases: generation, transmission and distribution. Generation is the process by which electricity is produced; transmission is the transportation of electricity that has been generated in power stations via high voltage, long distance power lines to local networks for distribution; and distribution is the actual delivery of electricity […]

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