Ageing Mitigation Control Method for Power Devices in Multilevel Inverters in Standalone PV Systems

2018 ◽  
Author(s):  
Mokhtar Aly ◽  
Emad M. Ahmed ◽  
Masahito Shoyama
Keyword(s):  
Control Method ◽  
Power Devices ◽  
Multilevel Inverters ◽  
Pv Systems

The Research of Two Staged Non-Isolated Photovoltaic Grid Connected Inverter Control Method

2013 ◽  
Vol 773 ◽  
pp. 139-142
Author(s):  
Jia Guo ◽  
Zhi Gang Li ◽  
Ya Ping Cheng ◽  
Chun Yan Cui
Keyword(s):  
Control Method ◽  
Current Control ◽  
Power Devices ◽  
Grid Current ◽  
Pv Systems ◽  
Sampled Signal ◽  
Bus Voltage ◽  
Grid Connected Inverter ◽  
And Control ◽  
Pv Grid

Grid-connected inverter topologies and control methods are analyzed and compared on the basis of two non-isolated PV grid-connected inverter circuit topology as 3kVA grid connected PV systems. In this paper, the current control method, the DC bus voltage outer grid current inner loop of the dual closed-loop PI control method. Sampled signal through the system circuit for processing, resulting in a SPWM drive signal to control the conduction of the power devices off the grid current control.

Cooperative Voltage Control Method by Power Factor Control of PV Systems and LRT

2012 ◽  
Vol 132 (4) ◽  
pp. 309-316 ◽  
Author(s):  
Shoji Kawasaki ◽  
Noriaki Kanemoto ◽  
Hisao Taoka ◽  
Junya Matsuki ◽  
Yasuhiro Hayashi
Keyword(s):  
Power Factor ◽  
Control Method ◽  
Voltage Control ◽  
Pv Systems ◽  
Power Factor Control

scholarly journals Improved Neutral-Point Voltage-Shifting Strategy for Power Balancing in Cascaded NPC/H-Bridge Inverter

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 167 ◽  
Author(s):  
Jin-Wook Kang ◽  
Seung-Wook Hyun ◽  
Jae-Ok Ha ◽  
Chung-Yuen Won
Keyword(s):  
Phase Equilibrium ◽  
Fault Tolerance ◽  
Output Power ◽  
Control Method ◽  
Neutral Point ◽  
Voltage Range ◽  
Multilevel Inverters ◽  
Three Phase ◽  
Power Balancing ◽  
Tolerance Control

This paper investigates the fault-tolerance control of a multilevel cascaded NPC/H-bridge (CNHB) inverter. The fault-tolerance control method has been widely used for multilevel inverters, such as the neutral-point voltage-shifting control, which can operate for a certain period of time by compensating for the phase voltage of a faulty stack even if one stack is broken. Even though the three-phase equilibrium is maintained in the case of failure by using the conventional neutral-point voltage-shifting control, an imbalance in the output power occurs between each stack, which causes problems for maintenance and lifetime. Therefore, this paper proposes a fault-tolerance control that can maintain three-phase equilibrium in a case of stack failures and minimize power imbalances between the stacks. The problem of the conventional neutral-point voltage-shifting control is presented based on the output power. In addition, the power imbalance is improved by performing selective neutral-point voltage-shifting control according to the reference voltage range. To verify the principle and feasibility of the proposed neutral-point voltage-shifting control method, a simulation and an experiment are implemented with the CNHB inverter.

Enhancement of PV Penetration with Centralized Control Method in Cimei Island Distribution System

2015 ◽  
Vol 799-800 ◽  
pp. 1272-1277
Author(s):  
Chia Hung Lin ◽  
Chao Shun Chen ◽  
Cheng Ting Hsu ◽  
Wei Lin Hsieh ◽  
Yih Der Lee ◽  
...  
Keyword(s):  
Line Segment ◽  
Distribution System ◽  
Load Transfer ◽  
Reactive Power ◽  
Control Method ◽  
Reactive Power Compensation ◽  
Control Algorithms ◽  
Centralized Control ◽  
Pv Systems ◽  
Pv Penetration

This paper discusses the use of centralized control method in an Intelligent Energy Management System (iEMS) to prevent voltage violation after load transfer between distribution feeders with high PV penetration level. The proposed method comprises three control modes with different control algorithms for regulating both reactive and active power output of PV inverters in a distribution system with multiple PV installations. Before the execution of load transfer, the total reactive power compensation required at the critical Point of Common Coupling (PCC) is solved by the reactance of distribution feeder line segment to prevent system voltage violation. With the proposed control algorithms, the iEMS dispatches total reactive power compensation among PV systems according to the reactance of line segment and issues the control command to each PV inverter for adjustment of PV power generation so that the ancillary service of voltage support can be provided by all PV systems in a fairer manner. A practical Cimei island distribution feeder pair is selected for computer simulation to verify the effectiveness of the proposed control method after load transfer between two feeders.

scholarly journals Transformerless Multilevel Voltage-Source Inverter Topology Comparative Study for PV Systems

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3261 ◽  
Author(s):  
Adyr A. Estévez-Bén ◽  
Alfredo Alvarez-Diazcomas ◽  
Juvenal Rodríguez-Reséndiz
Keyword(s):  
Leakage Current ◽  
Clean Energy ◽  
Industrial Applications ◽  
Renewable Energies ◽  
International Standards ◽  
Voltage Source ◽  
Switching Frequency ◽  
Multilevel Inverters ◽  
Pv Systems ◽  
Advantages And Disadvantages

At present, renewable energies represent 25% of the global power generation capacity. The increase in clean energy facilities is mainly due to the high levels of pollution generated by the burning of fossil fuels to satisfy the growing electricity demand. The global capacity of generating electricity from solar energy has experienced a significant increase, reaching 505 GW in 2018. Today, multilevel inverters are used in PV systems to convert direct current into alternating current. However, the use of multilevel inverters in renewable energies applications presents different challenges; for example, grid-connected systems use a transformer to avoid the presence of leakage currents. The grid-connected systems must meet at least two international standards analyzed in this work: VDE 0126-1-1 and VDE-AR-N 4105, which establish a maximum leakage current of 300 mA and harmonic distortion maximum of 5%. Previously, DC/AC converters have been studied in different industrial applications. The state-of-the-art presented in the work is due to the growing need for a greater use of clean energy and the use of inverters as an interface between these technologies and the grid. Also, the paper presents a comparative analysis of the main multilevel inverter voltage-source topologies used in transformerless PV systems. In each scheme, the advantages and disadvantages are presented, as well as the main challenges. In addition, current trends in grid-connected systems using these schemes are discussed. Finally, a comparative table based on input voltage, switching frequency, output levels, control strategy used, efficiency, and leakage current is shown.

Design and Application of Distributed Solar Power Quality Detection System

2015 ◽  
Vol 742 ◽  
pp. 195-198
Author(s):  
Xue Fei Chang ◽  
Xiang Yu Lv ◽  
Zhe Yong Piao ◽  
De Xin Li
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Detection System ◽  
Algorithm Design ◽  
Photovoltaic Cell ◽  
Experimental Platform ◽  
Pv Systems ◽  
Join Algorithm ◽  
Quality Detection ◽  
Single Phase Inverter

This paper studies the stand-alone PV systems, including modeling and simulation of photovoltaic cells based on a battery charge and discharge algorithm design, simulation and design portion of the push-pull boost, simulation and design of single-phase inverter system through experimental platform was build, complete functional test of each module. After considering comprehensive choice as to interfere with observation control method in this paper, based on the principle of interference observation, simulation model in Matlab, through its simulation results and did not join algorithm results were compared and found can effectively increase the output power of the photovoltaic cell.

A PWM method for single-phase cascade multilevel inverters to reduce leakage ground current in transformerless PV systems

2016 ◽  
Vol 26 (11) ◽  
pp. 2353-2369 ◽  
Author(s):  
Gerardo Vazquez ◽  
Panfilo R. Martinez-Rodriguez ◽  
Gerardo Escobar ◽  
Jose M. Sosa ◽  
Rigoberto Martinez-Mendez
Keyword(s):  
Single Phase ◽  
Multilevel Inverters ◽  
Pv Systems ◽  
Ground Current

scholarly journals Performance evaluation and comparison of diode clamped multilevel inverter and hybrid inverter based on PD and APOD modulation techniques

2019 ◽  
Vol 8 (2) ◽  
pp. 143
Author(s):  
N. Susheela ◽  
P. Satish Kumar
Keyword(s):  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Number Of Components ◽  
Modulation Techniques ◽  
Modulation Methods

<p>The popularity of multilevel inverters have increasing over the years in various applications without use of a transformer and has many benefits. This work presents the performance and comparative analysis of single phase diode clamped multilevel inverter and a hybrid inverter with reduced number of components. As there are some drawbacks of diode clamped multilevel inverter such as requiring higher number of components, PWM control method is complex and capacitor voltage balancing problem, an implementation of hybrid inverter that requires fewer components and less carrier signals when compared to conventional multilevel inverters is discussed. The performance of single phase diode clamped multilevel inverter and hybrid multilevel inverter for seven, nine and eleven levels is performed using phase disposition, alternate phase opposition disposition sinusoidal pulse width modulation techniques. Both the multilevel inverter are implemented for the above mentioned multicarrier based Pulse Width Modulation methods for R and R-L loads.  The total harmonic distortion is evaluated at various modulation indices. The analysis of the multilevel inverters is done by simulation in matlab / simulink environment.</p>

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