Results 31 to 40 of about 13,079 (253)
Multilevel cascaded three-phase inverter with low-voltage ride-through flexible control capability for photovoltaic systems [PDF]
Proceedings of the Estonian Academy of Sciences, 2020 A potential solution for medium and large-scale solar power plants connected to a grid is the multilevel cascade H- bridge (CHB) inverter. Nevertheless, it has not been thoroughly studied how it operates during voltage sags.
Omar Kanaan Kanaan Albasri +1 more
doaj +1 more source
Voltage Unbalance Compensation in Distribution Feeders Using Soft Open Points
Journal of Modern Power Systems and Clean Energy, 2022 Soft open points (SOPs) are power electronic devices that may replace conventional normally-open points in distribution networks. They can be used for active power flow control, reactive power compensation, fault isolation, and service restoration ...
Rui You, Xiaonan Lu
doaj +1 more source
Tradeoffs between AC power quality and DC bus ripple for 3-phase 3-wire inverter-connected devices within microgrids [PDF]
, 2011 Visions of future power systems contain high penetrations of inverters which are used to convert power from dc (direct current) to ac (alternating current) or vice versa.
Burt, Graeme M. +2 more
core +1 more source
IET Renewable Power Generation, 2016 Low‐voltage distribution grids (LV) experience unbalanced voltage condition due to the high penetration levels of rooftop mounted single‐phase photovoltaic (PV), the existence of single‐phase transformers, unbalanced cable impedances and different load levels on each phase.
El-Naggar, Ahmed, Erlich, István
openaire +2 more sources
Flexible Compensation of Voltage and Current Unbalance and Harmonics in Microgrids
Energies, 2017 In recent years, the harmonics and unbalance problems endanger the voltage and current quality of power systems, due to increasing usage of nonlinear and unbalanced loads.
Seyyed Yousef Mousazadeh Mousavi +3 more
doaj +1 more source
Energy Reports, 2022 The unbalance of neutral-point potential (NPP) is an important problem in three-level converter. This paper proposes a neutral-point potential balancing control method with the third harmonic injected pulse width modulation (PWM) for three-level ...
Jie Tian +4 more
doaj +1 more source
Energies, 2018 The direction taken towards sustainable power system and renewable energy generation is now irreversible. The power grid needs to host more renewable energy sources, such as solar power, and tackle power quality problems that come along with it.
Ammar Arshad +2 more
doaj +1 more source
Adaptation of power lines fault location methods to voltage characteristics deviations [PDF]
E3S Web of Conferences, 2019 The influence of voltage characteristics deviations, acceptable in normal operation of power grid, at power lines emergency state fault location methods precision is considered.
Obalin Mixail, Majstrenko Georgij
doaj +1 more source
Frontiers in Energy Research, 2023 Under non-ideal grid operating conditions such as unbalanced grid voltage and harmonic grid that are commonly found in microgrid conditions, the negative sequence components of the microgrid voltage interfere with the active and reactive current controls
Sue Wang, Junbo Yang
doaj +1 more source
Point estimate method for voltage unbalance evaluation in residential distribution networks with high penetration of small wind turbines [PDF]
, 2014 Voltage unbalance (VU) in residential distribution networks (RDNs) is mainly caused by load unbalance in three phases, resulting from network configuration and load-variations.
Farrag , Mohamed Emad A. +3 more
core +2 more sources