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Flicker Mitigation by Speed Control of Permanent Magnet Synchronous Generator Variable-Speed Wind Turbines

Hu, Weihao; Zhang, Yunqian; Chen, Zhe; Hu, Yanting - In: Energies 6 (2013) 8, pp. 3807-3821

Grid-connected wind turbines are fluctuating power sources that may produce flicker during continuous operation. This … and permanent magnet synchronous generator (PMSG) developed in the simulation tool of PSCAD/EMTDC. Flicker emission of … effects is the significant part in the flicker emission of variable speed wind turbines with PMSG during continuous operation …

Persistent link: https://www.econbiz.de/10010681654

Power Quality and Harmonic Analysis of End User Devices

Dolara, Alberto; Leva, Sonia - In: Energies 5 (2012) 12, pp. 5453-5466

Among the non-linear loads used in household, Compact Fluorescent Lamps (CFLs) and LED lamps are becoming more widespread, while incandescent lamps are intended to be replaced by these types of lighting devices. LEDs and CFLs are significantly more efficient and economical than incandescent...

Persistent link: https://www.econbiz.de/10010668146

New Power Quality Analysis Method Based on Chaos Synchronization and Extension Neural Network

Wang, Meng-Hui; Yau, Her-Terng - In: Energies 7 (2014) 10, pp. 6340-6357

A hybrid method comprising a chaos synchronization (CS)-based detection scheme and an Extension Neural Network (ENN) classification algorithm is proposed for power quality monitoring and analysis. The new method can detect minor changes in signals of the power systems. Likewise, prominent...

Persistent link: https://www.econbiz.de/10011030695

Power Quality Assessment in Small Scale Renewable Energy Sources Supplying Distribution Systems

Golovanov, Nicolae; Lazaroiu, George Cristian; Roscia, … - In: Energies 6 (2013) 2, pp. 634-645

The impact of wind turbines and photovoltaic systems on network operation and power quality (harmonics, and voltage fluctuations) is very important. The capability of the power system to absorb this perturbation is dependent on the fault level at the point of common coupling. The paper deals...

Persistent link: https://www.econbiz.de/10011030735

Design of a Control Scheme for Distribution Static Synchronous Compensators with Power-Quality Improvement Capability

Roncero-Sànchez, Pedro; Acha, Enrique - In: Energies 7 (2014) 4, pp. 2476-2497

Electric power systems are among the greatest achievements of the last century. Today, important issues, such as an ever-increasing demand, the flexible and reliable integration of distributed generation or a growth in disturbing loads, must be borne in mind. In this context, smart grids play a...

Persistent link: https://www.econbiz.de/10011030880

Vehicle to Grid Services: Potential and Applications

Ehsani, Mehrdad; Falahi, Milad; Lotfifard, Saeed - In: Energies 5 (2012) 10, pp. 4076-4090

Electric Vehicle (EV) technology is expected to take a major share in the light-vehicle market in the coming decades<em>.</em> Charging of EVs will put an extra burden on the distribution grid and in some cases adjustments will need to be made. On the other hand, EVs have the potential to support the...

Persistent link: https://www.econbiz.de/10011031162

Transient Analysis of Large Scale PV Systems with Floating DC Section

Brenna, Morris; Dolara, Alberto; Foiadelli, Federica; … - In: Energies 5 (2012) 10, pp. 3736-3752

The increasing penetration of renewable sources with power-electronic interfaces in power systems is raising technical problems and the overall efficiency of photovoltaic systems can decrease dramatically. In this context, the optimal layout for the photovoltaic system is required. The most...

Persistent link: https://www.econbiz.de/10010676133

An Analysis of Variable-Speed Wind Turbine Power-Control Methods with Fluctuating Wind Speed

Kim, Yun-Su; Chung, Il-Yop; Moon, Seung-Il - In: Energies 6 (2013) 7, pp. 3323-3338

Variable-speed wind turbines (VSWTs) typically use a maximum power-point tracking (MPPT) method to optimize wind-energy acquisition. MPPT can be implemented by regulating the rotor speed or by adjusting the active power. The former, termed speed-control mode (SCM), employs a speed controller to...

Persistent link: https://www.econbiz.de/10010676141

Current Harmonics Compensation in Microgrids Exploiting the Power Electronics Interfaces of Renewable Energy Sources

Bouloumpasis, Ioannis; Vovos, Panagis; Georgakas, … - In: Energies 8 (2015) 4, pp. 2295-2311

This work presents a method of current harmonic reduction in a distorted distribution system. In order to evaluate the proposed method a grid with high-order current harmonics is assumed. The reduction of current distortion is feasible due to the pulse modulation of an active filter, which...

Persistent link: https://www.econbiz.de/10011211013

Altering Kinetic Energy Entrainment in Large Eddy Simulations of Large Wind Farms Using Unconventional Wind Turbine Actuator Forcing

VerHulst, Claire; Meneveau, Charles - In: Energies 8 (2015) 1, pp. 370-386

In this study, horizontally periodic large eddy simulations (LES) are utilized to study turbulent atmospheric boundary-layer flow over wind turbines in the far-downstream portion of a large wind farm where the wakes have merged and the flow is fully developed. In an attempt to increase power...

Persistent link: https://www.econbiz.de/10011114943