Medium Voltage Articles
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What are the main key differences between a dry-type transformer and a oil filled transformer?
There are several key differences between a dry-type transformer and an oil-filled transformer. The main differences include the type of insulation used, the cooling method, the size and weight, and the applications for which they are typically used. One of the main differences between a dry-type transformer and an oil-filled transformer is the type of insulation used. A dry-type transformer ...
By Protrafo
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How to find the right cable manufacturer to purchase
Medium and low voltage power cables are a kind of main materials in power construction projects. It is also an important part of the material procurement work of relevant construction and demand units. Its procurement occurs frequently and involves a large amount of money. The quality of procurement and supply of medium and low voltage power cables (hereinafter referred to as cables) will ...
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Status of export of cable industry
The cable products exported by China are basically the simplest, with the lowest technical content and the most common, such as AAC, ACSR, low-voltage construction wires, low-voltage power cables, etc. In recent years, there have been medium voltage cables with ancient technology Cross-linked cable and ABC cable outlet. Imported cable products are special high-end cable products that are required ...
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How to choose the cross-sectional area of the power cable
The choice of the cross-sectional area of the power cable is related to the investment, the loss and voltage quality of the line, and the service life of the cable. If the cross-sectional area of the power cable is too small, the voltage quality will drop, the line loss will be too large, and the initial investment will be too high. Therefore, the appropriate cross-sectional area should be ...
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How are evolving standards improving MV installations?
Standards must evolve to ensure safer and efficient MV installations Almost all products people use in their daily lives - such as electronics, cars, medical devices, and home energy systems - were designed to meet designated industry standards. For the consumer, this means that these products meet both the safety and performance requirements. This even more true for MV installations ...
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Why 98% of commercial and industrial buildings aren’t getting the most value out of their solar installations
Solar installations at commercial and industrial buildings have soared in recent years, with businesses realizing that they’re smart investments. Part of the reason is that solar installations produce clean, locally generated energy — a must-have in a time of ambitious sustainability goals. But not all solar installations are alike. According to a 2021 study by Berkeley Lab, 98 ...
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6 reasons smart grids need green, digital and more secure ring main units (RMU)
Globally, every industry is accelerating decarbonization initiatives. Buildings and factories are becoming more electrified by replacing fossil-fuel-based heating and processes. As more renewable energy is progressively added to the power grid, the grid itself must take steps to decarbonize. The SF6 greenhouse gas currently has a unique use exemption in insulating medium-voltage (MV) electrical ...
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How to select suitable SMA inverter for your On Grid PV system
Introduction The PV system installation are done in centralized and decentralized structure considering the required capacity. Mostly, centralized structures are done in MW/GW scale with a single massive DC and AC built in super inverters. While in a decentralized structure, the inverter DC and AC built capacity is less. However, combining more than a single inverter we could still possibly ...
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Tata Steel UPP Control System India Case Study
For our customer TATA, a system control for an iron mine was installed in June 2017 in the Indian city of Noamundi. Our UPP System connects the newly erected photovoltaic system with the existing diesel generators. Diesel, PV, grid power supply and all switching devices for the medium voltage systems are now fully automatic to ensure a stable power supply and a maximum of diesel fuel saving. In ...
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The solar 52 GWp cover is probably going away - and the market too?
In the "No Climate Package" from September 20, 2019 there is also a wording that the 52 GWp cover for photovoltaics should be deleted. Contrary to what was given in a paper from the lecture, there are no precise stipulations or further adjustments for photovoltaics. It looks like a large part of the photovoltaic market disappears before the cover is painted. What's going on now? The lid ...
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Network inquiries digitally and at the push of a button - E.DIS takes the first step
They are often a very big nuisance of the necessary network inquiries before a solar system can enter the network. These are not only opaque, but often take a painfully long time. The often heavily criticized network operator E.DIS AG takes a strong first step towards a digitized network request at the push of a button. Annoyance network requests Although all renewable energy systems have the ...
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A complex network approach for identifying vulnerabilities of the medium and low voltage grid
The vision behind the smart grid promises, among other things, to bring more attention to the lower layers of the distribution network where users are gradually transforming into prosumers. Independent of this transformation, users will expect the same (or higher) level of reliability of the infrastructure. In this paper, we consider physical samples from the Dutch medium and low voltage network ...
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Performance improvement of indirect vector controlled induction motor drive using multi–level inverter
Multi–level inverter has emerged as an important topology in the area of high power–medium voltage control applications due to its several advantages such as a better output voltage with reduced total harmonic distortion (THD), reduction of voltage ratings of the power semiconductor switching devices and also the reduced electro–magnetic interference problems etc. This paper presents the ...
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Power circuit breaker using micro-mechanical switches
The objective of this research is to investigate innovative power distribution components based on micro-electromechanical systems technologies integrated with advanced optimisation methods to improve the performance of electric power distribution systems. A novel medium voltage circuit breaker using two switching string assemblies has been developed. The building block is a switching unit, which ...
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