Browsing Institutt for elkraftteknikk by Document Types "Chapter"
Now showing items 1-20 of 201
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3-Phase Multi-Functional Grid-Tied Inverter for Compensation of Oscillating Instantaneous Power
(Chapter, 2019)The primary objective of this paper is to present the basic terms of Conservative Power Theory (CPT) and its applications for compensating instantaneous power oscillations in three-phase three-wire systems. The reference ... -
A control scheme for utilizing energy storage of the modular multilevel converter for power oscillation damping
(Chapter, 2017)This paper presents a control scheme that utilizes energy storage of the Modular Multilevel Converter (MMC) for Power Oscillation Damping (POD) service. Such a service is used to enhance grid stability by providing damping ... -
A Data-driven Approach to Grid Impedance : Identification for Impedance-based Stability Analysis under Different Frequency Ranges
(Chapter, 2019)The instability caused by inappropriate damping design of grid-connected converters under specific grid impedance makes the grid impedance estimation a crucial issue. To guide the system controller design toward a stable ... -
A Guideline for employing PSIM on power converter Applications: Prototyping and educational tool
(Chapter, 2017)Fast prototyping tools for power electronics and control systems are becoming handful players on effortlessly translating computer simulated results into real experimental validations, not abdicating reliability. Among ... -
A novel arrangement for improving three phase saturated-core fault current limiter (SCFCL)
(Chapter, 2018)Fault current limiter (FCL) is a device that has low impedance in normal state of the power network and has simultaneous large impedance in the time of fault, so that it would lead to limitation of the fault current. Among ... -
A Novel Methodology to Monitor Partial Discharges in Microvoids at Solid-Solid Interfaces
(Chapter; Peer reviewed, 2019)The combination of two solid dielectrics increases the risk of partial discharge (PD) activity in microscopic cavities at the solid-solid dielectric interfaces, facilitating interface tracking failures. The main purpose ... -
A Robust Predictive MPPT Strategy: An Enabler for Improving the Photovoltaic Conversion Source
(Chapter, 2017)The key drivers for Maximum Power Point Tracking (MPPT) solutions in photovoltaic (PV) power plants are independency from solar panels, fast tracking of irradiance and temperature variations, and efficiency of conversion ... -
A Stochastic mixed integer linear programming formulation for the balancing energy activation problem under uncertainty
(Chapter, 2017)In the activation market, the Transmission System Operator selects and activates balancing energy bids to cover the system imbalance. Growing use of intermittent energy sources increases uncertainty in system operation and ... -
A Topology-based Scheme for Adaptive Underfrequency Load Shedding
(Chapter, 2017)This paper presents a topology-based scheme for adaptive underfrequency load shedding (UFLS). By tracking changes of power system topology and information about power flow, the proposed method is able to identify islanded ... -
Active Compensation of Unbalanced Load Currents in Grid Connected Voltage Source Converters
(Chapter, 2019)For a 2-level 3-phase voltage source converter connected to the grid, it should be capable of supporting the grid with maximum possible active and reactive power during balanced and unbalanced load condition. This paper ... -
Agent Based Modelling and Simulation of Plug-In Electric Vehicles Adoption in Norway
(Chapter, 2018)This paper looks into the consumption side of the power balance, and more specifically on the effects of utilizing an increasingly larger fleet of Plug-in electric vehicles (PEVs) for personal transportation. To asses this, ... -
An accurate MPPT scheme for photovoltaic modular-based Conversion units: A robus sensorless predictive aproach
(Chapter, 2017)This research presents a Maximum Power Point Tracking (MPPT) algorithm for a solar photovoltaic (PV) power station which is constructed based on modified circuit topology of the Modular Multilevel Converter (MMC). The ... -
An Approach for Small Scale Power Hardware in the Loop Emulation of HVDC Cables
(Chapter, 2018)Long HVDC cables are difficult to emulate in laboratory settings due their complex behaviour and fast transient response. This paper presents the methodology for the design and the laboratory implementation of a HVDC cable ... -
An insight into geometry and orientation of capacitors for high-speed power circuits
(Chapter, 2018)SiC transistors can switch extremely fast. Often turn-off di/dt is reduced to limit the turn-off over voltages due to the stray inductances in the commutation loops. Thus, the potential low switching losses are not met. ... -
Analysis of Additional Eddy-Current Copper Losses in Large Converter-Fed Hydropower Generators
(Chapter, 2018)This paper investigates the effect of converter operation on AC copper losses in the stator and damper windings of a large hydrogenerator. Stator currents are computed using finite element simulations. The computed current ... -
Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator
(Chapter, 2017)This paper investigates the influence of converter-fed operation on magnetic forces and radial vibration in a hydrogenerator. Flux density distribution is computed using time-stepping finite element (FE) analysis and used ... -
Analysis of MMC Dynamics in DQZ Coordinates for Vertical and Horizontal Energy Balancing Control
(Chapter, 2018)This paper presents a control system implementation in dqz-coordinates for equalizing the average energies stored in each arm of a Modular Multilevel Converter (MMC); a control objective that is typically referred to as ... -
Analytical and FEM Calculation of Electrical Parameters of Carbon Steel Pipe in DEH Systems
(Chapter, 2018)In Direct Electrical Heating (DEH) systems, the pipeline of subsea oil productions conducts a large AC current to generate heat. To further improve the effectiveness of the DEH, higher operating frequency is preferable. ... -
Analytical design considerations for MVDC solid-state circuit breakers
(Chapter, 2019)This paper investigates the design principles of a solid-state circuit breaker (SS CB) for medium voltage direct current (MVDC) grids. The emphasis is given on the design of the required active and passive components that ... -
An Analytical Model for Detailed Transient Fault Analysis of Doubly-Fed Induction Machines
(Chapter, 2020)This paper presents an exact analytical solution to the two-phase and three-phase short-circuit events of the doubly-fed induction machine (DFIM). The contribution is intended to strengthen the predictability of DFIMs under ...