high voltage Articles

  • Customer case: Telenor reaps the benefits of remote power

    The Norwegian telco operator Telenor applies Eltek's "remote power" concept in their mobile network, distributing 380 V DC to Remote Radio Units (RRUs) - with significant documented savings as a result. In collaboration with Eltek, the Telenor Technology Centre has developed a solution for High Voltage Distribution which offers completely new opportunities and savings for the development of the ...


    By Eltek AS

  • Sunny Boy Storage is affordable and also flexible applicable

    Independent and affordable electricity supply for your home – until now that was not feasible from a technical perspective. But that’s exactly what the new SMA battery inverter Sunny Boy Storage offers. In March, the inverter has been honored with the Innovation Prize at the PV symposium Bad Staffelstein. Volker Wachenfeld, Executive Vice President of the SMA Offgrid ...


    By SMA Solar

  • Electricity Alliance case study

    Enabling incident management and audit The Electricity Alliance carries out construction works to connect new electricity generation, such as wind farms and power stations, to the National Grid network. It also enhances and replaces existing National Grid assets, including substations, overhead lines and underground cables, to ensure the continued safe and reliable operation of the ...


    By Rivo, a Sphera Company

  • Spectral analysis of a real power network

    We present a spectral analysis of a significant part of the Italian bulk power system. Spectral analysis applied to graphs is not a new tool, but analyses of the real world, especially of technological networks, currently are lacking. We show the spectral pattern of a high voltage power network, calculate the ratio between the smallest and largest non–zero Laplacian eigenvalue to check its ...


    By Inderscience Publishers

  • Day-ahead AC-DC OPF-based nodal price prediction by artificial neural network (ANN) in a restructured electricity market

    In the last few years, electricity markets have significantly restructured in both developed and developing countries. Accurate prediction of day–ahead electricity nodal price has now become an important activity to address the price volatility in the marketplace. This will facilitate the market participants to estimate the risk and have effective decision–making in formulating bidding strategy. ...


    By Inderscience Publishers

  • A power-flow control method for hybrid active front-end converters

    The hybrid active front-end converter, which is composed of a capacitor and a voltage source converter in series connection, has been presented recently. Compared with grid-connected converter, the hybrid converter could be operated with reduced dc voltage as well as small-sized passive filters due to series-connected capacitor. This paper presents a power flow control method for a hybrid active ...


    By Inderscience Publishers

  • A simple carrier-based neutral point potential regulator for three-level diode clamped inverter

    Three-level diode clamped inverter is a proven technology nowadays in medium and high power applications. Despite of its several advantages such as harmonic reduction and achieving high voltage and high power capabilities without series and parallel connections of switching devices, neutral point potential (NPP) variation is the inherent problem with this topology. This paper presents a simple ...


    By Inderscience Publishers

  • Switched-coupled-inductor DC/DC converters with high voltage conversion ratio

    When a low voltage DC power source is used, a DC-DC converter with a high step-up voltage gain is required to raise the voltage to more applicable levels. This is typically achieved by using classical converters driven by pulse width modulation (PWM) waves with extremely high duty cycles. Although theoretically step-up converters can achieve an infinite gain as the duty cycle approaches unity, in ...


    By Inderscience Publishers

  • A modified non-dissipative LC snubber circuit for MOSFET based fly-back converters

    High frequency converters with different switching topologies are now being widely used over a wide range of applications, which mainly includes different types of power supplies. Snubber circuit design for high frequency-switched converters using MOSFET as a power device assumes different dimension as regards the minimisation of the power dissipation in the snubber resistance. This paper shows a ...


    By Inderscience Publishers

  • H∞ controller for stability enhancement in VSC HVDC system with parallel AC lines

    In this paper, a state-space model for a voltage source converter based high voltage direct current (VSC HVDC) transmission link in parallel with an AC transmission line is developed using dq-coordinate system. A robust H∞ control design for the converter and inverter of the VSC HVDC system is proposed to maintain the DC voltage and control the active and reactive power at the converter stations. ...


    By Inderscience Publishers

  • The evolution of the topology of high-voltage electricity networks

    The electricity network represents an example of an evolving complex system. The first local networks contained only a few nodes, but within several decades, they have evolved into a highly connected continental system. The growth of these networks was influenced by various factors such as economic, demographic, political and technological developments. In this paper, we analyse the growth of the ...


    By Inderscience Publishers

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