Switching loss reduction of switched capacitor multilevel inverter using bus clamping modulation
01 Dec 2015-pp 1-6
TL;DR: In this paper, a simulation of three phase structure for recently proposed topology based on selfvoltage balancing capability with step up switched capacitor multilevel inverter has been performed in PSCAD software.
Abstract: In this paper simulation of three phase structure for recently proposed topology based on self-voltage balancing capability with step up switched capacitor multilevel inverter has been performed in PSCAD software. This topology has simplified gate circuit since number of active switches are less when compared with other switched capacitor topologies. Another advantage is the voltage boost capability with only one voltage source per phase. Sinusoidal Pulse Width Modulation and Bus Clamped Pulse Width Modulation techniques have been considered for both R and RL loads and results have been compared at different modulation indices for both 50 Hz and 400 Hz output voltage. Bus Clamped Pulse Width Modulationis capable of reducing switching losses and gives reduced harmonic distortions even at modulation indices close to unity.
Citations
More filters
TL;DR: The analysis and implementation of the most suitable carrier based control strategy technique show superiority over the harmonic content for different techniques for the aforementioned topology.
Abstract: Objectives: In the last two decades, various control algorithms have been proposed for several multilevel converter topologies each having their pros and cons compared with improvement in harmonic performance and efficiency. The multicarrier modulation strategy seems to be the most common thread for multilevel topologies. Methods/Statistical Analysis: The harmonic observations for phase shifted and phase disposition multicarrier strategy is different for cascaded and neutral point clamped topologies. The exemplification of mathematical analysis and hardware in loop results with Nexys 4 FPGA digital controller with Xilinx and MATLAB/Simulink for digital control modulation of Marx multilevel inverter for photovoltaic application is discussed. Findings: The balanced charging and discharging of the capacitor will lead to less leakage current, further reducing the health hazards to the working personals in the region. The analysis and implementation of the most suitable carrier based control strategy technique show superiority over the harmonic content for different techniques for the aforementioned topology. The hardware results show the similarity with the simulated version with comparison with pre-existing topologies. Application/Improvements: The paper discusses the application with real-time hardware photovoltaic implementation of self-boost capable Marx multilevel inverter with an added advantage of equalization with capacitor charge. An improved total harmonic distortion evaluation with preexisting topologies is presented.
4 citations
01 Nov 2018
TL;DR: Control of Solar PV-Wind hybrid system is proposed for standalone three phase applications to improve system efficiency and battery life and provides better performance with accurate tracking of references.
Abstract: Increasing need of clean energy have driven mankind towards renewable sources. PV and wind sources being readily available and pollution free are gaining popularity. Thus, control of Solar PV-Wind hybrid system is proposed for standalone three phase applications. Solar and Wind sources are integrated at DC link with battery backup. Inverter supplies the load. PV is associated with DC interface by means of boost converter performing MPPT or Desired Power Control (DPC) as required and boosting its output voltage. PMSG usedfor wind energy conversion is further integrated to DC link via rectifier and boost converter to perform Maximum power point Tracking (MPPT). The battery is connected through a bidirectional converter to maintain DC link at a specified level and enable energy displacement as per energy production and load. DPC algorithm allows extracting only desired amount of power form PV according to prevailing load requirements. It thus can also prevent deep discharging or overcharging of battery. This improves system efficiency and battery life. The inverter performance is enhanced by using synchronous reference frame transformation for its control which helps in regulation of AC output voltage, getting exact data about load's active power component and diminishing complexity of control. Its control is such that output voltage and frequency is maintained. PV Boost, bidirectional converter and inverter are operated in inner current control and outer voltage control mode. This provides better performance with accurate tracking of references. All analytical, simulation and partial hardware results are included.
Cites methods from "Switching loss reduction of switche..."
...As control in the synchronous dq frame is less complex and accurate, it is used for the control of simple H-bridge 3-phase inverter[13][14][15]....
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References
More filters
TL;DR: The most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-Clamped (flying capacitor), and cascaded multicell with separate DC sources are presented and the circuit topology options are presented.
Abstract: Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. This paper presents the most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-clamped (flying capacitor), and cascaded multicell with separate DC sources. Emerging topologies like asymmetric hybrid cells and soft-switched multilevel inverters are also discussed. This paper also presents the most relevant control and modulation methods developed for this family of converters: multilevel sinusoidal pulsewidth modulation, multilevel selective harmonic elimination, and space-vector modulation. Special attention is dedicated to the latest and more relevant applications of these converters such as laminators, conveyor belts, and unified power-flow controllers. The need of an active front end at the input side for those inverters supplying regenerative loads is also discussed, and the circuit topology options are also presented. Finally, the peripherally developing areas such as high-voltage high-power devices and optical sensors and other opportunities for future development are addressed.
6,472 citations
"Switching loss reduction of switche..." refers background in this paper
...[1] Due to their superiority over three level inverters they are becoming more popular and have additional provided flexibility in various process industries[2][3]....
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Book•
03 Oct 2003
TL;DR: In this paper, an integrated and comprehensive theory of PWM is presented and the selection of the best algorithm for optimum pulse width modulation is an important process that can result in improved converter efficiency, better load (motor) efficiency, and reduced electromagnetic interference.
Abstract: An integrated and comprehensive theory of PWM. The selection of the best algorithm for optimum pulse width modulation is an important process that can result in improved converter efficiency, better load (motor) efficiency, and reduced electromagnetic interference. However, the identification of the best approach is a complex process requiring extensive mathematical manipulation.
2,450 citations
"Switching loss reduction of switche..." refers background in this paper
...Modulation strategies for multilevel inverters has been discussed in [22] [23]....
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TL;DR: A survey of different topologies, control strategies and modulation techniques used by cascaded multilevel inverters in the medium-voltage inverter market is presented.
Abstract: Cascaded multilevel inverters synthesize a medium-voltage output based on a series connection of power cells which use standard low-voltage component configurations. This characteristic allows one to achieve high-quality output voltages and input currents and also outstanding availability due to their intrinsic component redundancy. Due to these features, the cascaded multilevel inverter has been recognized as an important alternative in the medium-voltage inverter market. This paper presents a survey of different topologies, control strategies and modulation techniques used by these inverters. Regenerative and advanced topologies are also discussed. Applications where the mentioned features play a key role are shown. Finally, future developments are addressed.
2,111 citations
"Switching loss reduction of switche..." refers background in this paper
...Conventionally, multilevel inverters are classified into three categories namely neutral-point clamped or diode clamped multilevel inverter [4], flying capacitor multilevel inverter [5] and H-bridge cascaded multilevel inverter [6][7]....
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TL;DR: The basic operation and the most used modulation and control techniques developed to date of neutral-point-clamped inverters are presented and some technological problems such as capacitor balance and losses are presented.
Abstract: Neutral-point-clamped (NPC) inverters are the most widely used topology of multilevel inverters in high-power applications (several megawatts). This paper presents in a very simple way the basic operation and the most used modulation and control techniques developed to date. Special attention is paid to the loss distribution in semiconductors, and an active NPC inverter is presented to overcome this problem. This paper discusses the main fields of application and presents some technological problems such as capacitor balance and losses.
1,556 citations
"Switching loss reduction of switche..." refers background in this paper
...Conventionally, multilevel inverters are classified into three categories namely neutral-point clamped or diode clamped multilevel inverter [4], flying capacitor multilevel inverter [5] and H-bridge cascaded multilevel inverter [6][7]....
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