"Luhtala, Roni" - Selaus tekijän mukaan TUNICRIS-julkaisut
Viitteet 1-17 / 17
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Adaptive Grid-Voltage Feedforward for Three-Phase Inverters Applying Perturb and Observe Algorithm to Minimize Current THD
Annual Conference of the IEEE Industrial Electronics Society (IEEE, 10 / 2019)
conferenceObjectAs the amount of renewable energy increases rapidly, power systems will face novel challenges to maintain power quality. Power quality issues, which usually arise from the grid connection through power-electronic devices, ... -
Adaptive method for control tuning of grid-connected inverter based on grid measurements during start-up
(IEEE, 2019)
conferenceObjectAs the share of grid-connected converters increases, potential stability issues in the grid interface of the converters are emphasized. Impedance-based stability criterion can be used to assess the stability of the interface ... -
Adaptive Optimization of Current-Control Loop for Grid-Connected Inverters
Conference proceedings : IEEE Applied Power Electronics Conference and Exposition (IEEE, 2020)
conferenceObjectThe amount of grid-connected power electronics is rapidly increasing and their effect to power quality becomes important especially in areas with high penetration levels. In weak grids with significant grid impedance, the ... -
Amplitude design of perturbation signal in frequency-domain analysis of grid-connected systems
(Elsevier, 2020)
conferenceObjectThe rise of renewable electricity production has driven the power grid to a remarkable transformation, where a large share of the electricity production is integrated to the grid through power-electronic inverters. The ... -
Autonomous reactive power support for smart photovoltaic inverter based on real-time grid-impedance measurements of a weak grid
(2020)
articleA large share of renewable energy production is connected to a weak grid with significant grid impedance. The transmission impedance causes unintended flow of reactive power to grid, coupling the grid reactive power to the ... -
Combination of Orthogonal Injections in Impedance Measurements of Grid-Connected Systems
(25.09.2020)
articleImpedance-based stability criterion has become a popular method in determining the stability of grid-connected systems. Recent studies have presented the utilization of various pseudo-random-sequence (PRS) perturbations ... -
Hardware-in-the-loop methods for real-time frequency-response measurements of on-board power distribution systems
(07 / 2019)
articleThe operation of more electric aircraft is dependent on the embedded power grid. Therefore, the onboard power-distribution system must be reliable, having a high level of survivability, and promptly respond to any change ... -
Hardware-in-the-Loop Methods for Stability Analysis of Multiple Parallel Inverters in Three-Phase AC Systems
(2021)
articleModern electric distribution systems typically contain several feedback-controlled parallel inverters that together form a complex power distribution system. Consequently, a number of issues related to stability arise due ... -
Identification of three-phase grid impedance in the presence of parallel converters
(2019)
articleGrid impedance is an important parameter which affects the control performance of grid-connected power converters. Several methods already exist for optimizing the converter control system based on knowledge of grid impedance ... -
Impedance-based stability analysis of multi-parallel inverters applying total source admittance
(IEEE, 2019)
conferenceObjectThe utility-scale wind and solar electricity production is typically connected to the power grid through multiple parallel three-phase inverters. One of the main issues in such grid-connected systems is the harmonic resonance ... -
Online Frequency-Response Measurements of Grid-Connected Systems in Presence of Grid Harmonics and Unbalance
(2020)
articleGrid characteristics have a drastic impact on the stability and control performance of grid-connected systems. Because the grid conditions typically vary over time, online measurements are most desirable for the stability ... -
Practical implementation of adaptive SRF-PLL for three-phase inverters based on sensitivity function and real-time grid-impedance measurements
(01.03.2020)
articleRapidly increasing demand for renewable energy has created a need for the photovoltaic and wind farms to be placed in various locations that have diverse and possibly time-variant grid conditions. A mismatch between the ... -
Real-Time Impedance-Based Stability Assessment of Grid Converter Interactions
(2017)
conferenceObject -
Small-Signal Analysis of Photovoltaic Inverter with Impedance-Compensated Phase-Locked Loop in Weak Grid
(2020)
articleThe grid-connection point of photovoltaic inverters may exhibit inductive characteristics (i.e., a weak grid) due to long transmission cables as well as multiple transformers. A large grid impedance can arouse impedance-based ... -
Stability and Performance Analysis of Grid-Connected Inverter Based on Online Measurements of Current Controller Loop
Annual Conference of the IEEE Industrial Electronics Society (IEEE, 10 / 2019)
conferenceObjectThe amount of grid-connected three-phased inverters is increasing rapidly. In a weak grid, the non-ideal grid impedance decreases the control performance and can even compromise the system stability through load effect. ... -
Used Lithium-Ion Batteries in Second-Life Applications: Feasibility Study
IEEE Energy Conversion Congress and Exposition (IEEE, 2022)
conferenceObject -
Using high-bandwidth voltage amplifier to emulate grid-following inverter for AC microgrid dynamic studies
(25.01.2019)
articleAC microgrid is an attractive way to energize local loads due to remotely located renewable generation. The AC microgrid can conceptually comprise several grid-forming and grid-following power converters, renewable energy ...
