A5103957836- Photovoltaic System Optimization Techniques
- Microgrid Control and Optimization
- solar cell performance optimization
- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Advanced Battery Technologies Research
- Solar Radiation and Photovoltaics
- HVDC Systems and Fault Protection
- Power Systems and Renewable Energy
- High-Voltage Power Transmission Systems
- Islanding Detection in Power Systems
- Silicon and Solar Cell Technologies
- Smart Grid Energy Management
- Solar Thermal and Photovoltaic Systems
- Photovoltaic Systems and Sustainability
- Real-Time Systems Scheduling
- Higher Education Practises and Engagement
- Reflective Practices in Education
- Collaborative Teaching and Inclusion
- Electric Vehicles and Infrastructure
- Silicon Carbide Semiconductor Technologies
- IoT-based Smart Home Systems
- Wind Turbine Control Systems
- Electrical Contact Performance and Analysis
- Energy Harvesting in Wireless Networks
University of Leeds
2014-2024
This study describes a new application of flying capacitor multi-level inverters whereby three-phase, four-leg three-level inverter is used for harmonic current cancellation and unbalanced compensation in four-wire system. A direct three-dimensional-pulse-width modulation (3D-PWM) scheme developed to deal with the increased state redundancy inverter. Test results show much superior performance case, which may allow use smaller DC supply capacitors. modified dead–beat control algorithm...
Abstract This paper presents the stability-evaluation outcomes of a multimachine power system (MMPS) connected with large-scale hybrid wind farm (WF) and photovoltaic (PV) or wind/PV (HWPF) energy-storage (HESS) consisting vanadium redox flow battery (VRFB) supercapacitor (SC). A probability scheme is used to determine rated proposed HESS, where capacities VRFB-ESS SC-ESS are designed effectively utilize their operating features. The control strategy HESS reduce pressure smooth output...
This paper presents a new application of modular multilevel cascaded converters (MMCC) for combined active harmonic current elimination and reactive power compensation in distribution line. A technique simultaneous extracting components element the load is presented. novel voltage control scheme balancing module intra-cluster capacitor voltages under distorted incorporated. Simulation studies show desired performance MMCC-based conditioning operating PCC distortion varying conditions.
Grid connected converters commonly use LCL filters for harmonic content suppression. However, associated with such is a resonant frequency at which the gain value increases significantly. To mitigate this problem, notch filter introduced into current control loop of converter. When tuned to frequency, it introduces an opposing notch, thereby neutralizing resonance effect. ensure robustness system, must be made adaptive. This will any variation in either due change grid impedance or aging...
This paper presents a novel control scheme for modular multilevel cascaded converter (MMCC) functioning as an active power conditioner (APC) to the reactive power, eliminate current harmonics, and compensate unbalanced load simultaneously. combines modified predictive controller with inter-cluster intra-cluster voltage balance MMCC sub-module capacitors. Simulation studies of this MMCC-APC network containing both thyristor controlled rectifier are performed results verifying its performance...
A photovoltaic array is subject to reduction of output caused by partial shading which causes bypass diodes turn on. This can be alleviated partly or fully cross-tying the modules within rows array, and reconfiguring positions it. In this paper a PV reconfiguration algorithm based on magic square proposed. The reconfigured has effects more evenly dispersed over entire surface, reduces voltage current drop due diode conduction. performance scheme assessed using simple models patterns,...
This paper presents a statistical approach for identifying the significant impact of cracks on output power performance photovoltaic (PV) modules. Since there are few analysis data investigating in PV modules real-time long-term measurements. Therefore, this will demonstrate which uses two techniques: T-test and F-test. Electroluminescence (EL) method is used to scan possible examined Moreover, virtual instrumentation (VI) LabVIEW software predict theoretical based I-V P-V curves. The has...
Standard synchronisation scheme for grid-connected power converters has been known to fail correctly estimate the instantaneous phase angle of grid voltages which are unbalanced and corrupted with harmonics.There other advanced schemes have proposed address this issue but a thorough comparison among is lacking.This paper presents detailed review on five voltage schemes.A coherent investigation performed compare their merits limitations considering wide range distortions.This verified through...
Renewable energy sources such as solar and wind require power converters harmonic filters for interconnection with the grid. Central to operation of systems is controller, which ensures that maximum possible transferred from source Of these controllers, proportional-integral (PI) controller most commonly used, owing its ease implementation. This report therefore aims at comparing PI stationary reference frame equivalent known proportional-resonant (PR) controller. Both controllers are...
This paper proposes a novel comprehensive state of charge (SOC) and voltage control scheme for battery equalization. For the circuit topology, equalizers contain balancing circuits based on buck-boost converter which can guarantee bi-directional power flow between cells, each cell is corresponding to one circuit. scheme, real time SOC measured determine switching so that equalization path be changed accordingly. Real also minimize load ripple. PI controller then applied regulate both SOCs...
In this paper, a fault detection algorithm for multiple grid-connected photovoltaic (GCPV) array configurations is introduced. For given set of conditions such as solar irradiance and module temperature, number attributes power, voltage current are calculated using mathematical simulation model. Virtual instrumentation (VI) LabVIEW software used to monitor the performance GCPV system simulate theoretical I-V P-V curves examined system. The evaluated on series, parallel series-parallel...
With large penetration and uncontrolled charging discharging of Electric Vehicles (EVs) due to rapid increasing demand for clean energy, the upstream grid may face many technical issues such as energy security reliability risk. Therefore, it is essential carry out smart scheduling EVs. In this paper, a residential parking-lot scheme using 200 EVs an example developed schedule which based on initial final value State Of Charge (SOC) all requested by owner one day in advance, information...
This paper proposes a novel maximum power point tracking (MPPT) method and single-phase grid-connected photovoltaic (PV) system using half-bridge active neutral clamped (ANPC) inverter. The new MPPT uses modified artificial fish swarm algorithm (MAFSA) performed by boost DC/DC converter. For the ANPC switching-loss balancing pulse-width modulation scheme is used for control of has shown to increase searching speed accuracy, combining this technique with inverter, overall efficiency higher...
This paper presents a novel configuration of unified power flow controller (UPFC) using three-phase modular multilevel cascaded converter (MMCC) shunt connected on one end the transmission line. offers control flexibility, lower cost and losses compared to conventional UPFC. The scheme combines regulation at series side voltage MMCC part. An overall DC capacitor balancing is implemented ensure all floating capacitors voltages can be maintained their nominal values. Simulation studies this...
This paper presents an integrated dynamic pricing scheme (iDPS) developed for off grid community in sub-Sahara Africa (SSA). proposed model employs a neighbourhood approach effectively determining the electricity units due to connected consumers based on their monthly contributions. Assuming base values, this obviates need real time inputs from users owing high illiteracy level SSA and dynamically computes price such that below par paying pay more compared or above consumers. Additionally,...
This article discusses the methodology of a partnership-based collaborative project between investigators comprising two academics and one educational developer diverse group international students studying at UK University. The were recruited to co-design survey instrument better understand lived experiences their peers across institution, but prior doing so engaged in structured process weekly engagement create safe space where they could feel comfortable explore own experiences. produced...