A multilevel PWM inverter topology for photovoltaic applications

Agelidis, V.G.; Baker, Douglas M.; Lawrance, W.B.; Nayar, C.V.

doi:10.1109/isie.1997.649027

Cited by 114 publications

(44 citation statements)

References 13 publications

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“…Table II and show the different switching stages of the sevenlevel MLI controlled by SPWM. The frequency modulation index, which describe the frequency relation between the sinusoidal signal and the carrier signals is given by [6] and its value chosen to be 60 based on previous work.…”

Section: B Sinusoidal Pulse Width Modulation (Spwm)mentioning

confidence: 99%

“…Improvement of the output voltage required an appropriate control of the waveform on the inverter to reduce its respective harmonic and electromagnetic effect by the diminution of switching operations and hence the filter size [5]. The limitations of the conventional inverters in the case of power or harmonic effect lead to the usage of the multilevel inverter (MLI) technology which promises some advantages over the conventional inverter especially for high power applications [6]. Three main topologies for multilevel inverter are used.…”

Section: Introductionmentioning

confidence: 99%

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Comparison Study and Simulation of the Main Multilevel Inverter Topologies for Different Output Voltage Levels

Benioub¹,

Adnane²,

Itaka³

2017

ijeei

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This paper discusses the difference between the three fundamental types of multilevel inverter (MLI) topologies, which are the neutral-point-clamped, the flying capacitors and the cascaded H-bridges. The sinusoidal pulse width modulation technique was used to simulate the output voltages and currents of the MLI inverters. The total harmonic distortion (THD) was estimated for each topology and each voltage level. Moreover, the simulation results indicate that the cascaded structure exhibited a lower THD value even when increasing the number of the output voltage. Furthermore, a new key parameter was defined as cost efficiency factor and used to compare the three topologies. Evaluation results of this factor indicate that the cascaded structure was the most advantages as it reduces stress effect on the inverter switches by eliminating the power diodes and capacitors.Keywords: Multilevel Inverter, Sinusoidal Pulse-width modulation, Cost efficiency IntroductionThe fast growth of PV power application industry requires the development of new technologies to maximize the energy yield of the PV systems [1]. This technology concerns the electrical power operation control and transfer in between the PV sources and the customers, to keep the supply of the electric power in a way to match the international standard requirement for power supply [2]. One of the weak points of the PV systems is the incapability conversion from the DC voltage to the AC voltage before connecting to the power network [3]. This conversion is performed by inverters, which are used in power system application and uninterrupted power supplies industries [4]. Improvement of the output voltage required an appropriate control of the waveform on the inverter to reduce its respective harmonic and electromagnetic effect by the diminution of switching operations and hence the filter size [5]. The limitations of the conventional inverters in the case of power or harmonic effect lead to the usage of the multilevel inverter (MLI) technology which promises some advantages over the conventional inverter especially for high power applications [6]. Three main topologies for multilevel inverter are used. The first structure is known as the neutral-point-clamped (NPC) [7], the second as the flying capacitor (FC) [8] and the third as the cascaded H-bridge with separate DC sources [9]. They are characterized by many features such as low total harmonic distortion (THD) of generated output voltage, reduced size of the filter and increased the system efficiency [10]. Thus, aspect lead the MLI topologies to find their application in PV system on the low cost and high performance [11]. New combined topology have been reported, such as three-phase MMLI, where the authors developed to reduce the components number and improve the output voltage level [12]. Moreover, the MLDCL topology which is based on cascaded H-bridge topology connected with half H-bridges cells in a series configuration in purpose to reduce the components number. However, this topology shows a hi...

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Section: B Sinusoidal Pulse Width Modulation (Spwm)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison Study and Simulation of the Main Multilevel Inverter Topologies for Different Output Voltage Levels

Benioub¹,

Adnane²,

Itaka³

2017

ijeei

View full text Add to dashboard Cite

show abstract

“…This LC filter is used to remove the harmonics present in the output of the inverter and filtered output voltage is given to the three phase grid. The proposed inveretr inverter is modified from the reference papers [13]- [14] 4. CURRENT CONTROL SCHEME…”

Section: Three Phase Pv Inverter Topology and Principle Of Operationmentioning

confidence: 99%

Comparative Study of Three Phase Grid Connected Photovoltaic Inverter Using PI and Fuzzy Logic Controller with Switching Losses Calculation

Venkatesan¹,

Rajeshwari²,

Deverajan³

et al. 2016

IJPEDS

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A comparative study of three phase grid connected photovoltaic (PV) inverter using Proportional-Integral (PI) controller and Fuzzy logic controller (FLC) is presented in this paper. Proposed three phase inverter with single DC source employing three phase transformer for grid connected PV system controlled by using space vector pulse width modulation (SVPWM) technique. PI and FLC are used as current controller for regulating the current. Perturb and observe maximum power point technique (MPPT) is used for tracking of maximum power from the PV panel. Finally total harmonic distortion (THD) comparison made between two controllers for validation of results. Furthermore swithing losses of inverter are also presented. The simulation results are obtained using MATLAB simulink. Keyword:Fuzzy INTRODUCTIONIn the modern scientific world ruled by science, the utilizing of electricity has increased rapidly due to growing of population of the world. Nowadays, most of the research works have focused on PV based power generation due to major reasons such as price of fossil fuel, green house effect and energy available in nature [1]. Actually, solar panel is directly converting solar irradiation in to electrical energy [2]. It is necessary to convert available DC voltage into AC voltage and the converted AC voltage should be sinusoidal with high quality output voltage. For this purpose, multilevel inverter (MLI) is the most suitable choice for converting DC into AC compared to the conventional two level inverters with minimum THD values. MLI's broadly categorised into three main types namely, diode clamped, flying capacitor and cascade [3]- [4]. Three phase MLI inverter using cascaded H-Bridge with independent DC source is presented in the literature review [5]. The above topology, each H bridge require separate DC sources with equal rating and separate DC sources make it system bulky and costlier [6]. Cascade H bridge inverter employing single phase and three phase transformers with single DC input is also presented [7]. This configuration use single DC input and require additional single and three phase transformers for higher voltage level. In accordance with the observation from the references [5]- [7], inverter topology requires more DC input, transformers and switches which result in increased complexity, system size and cost. For maintain grid current as pure sinusodial Proportional-Integral (PI) controller and FLC controllers are used as feedback controller. The PI is maynot satisfactory in controlling various non linear control applications. Moreover the design of its control system is

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“…However, this topology uses a large number of power switches. In [21], a multilevel inverter was implemented by using two switches and two power diodes with an H-bridge single-phase inverter. These two systems can generate only five output voltage levels.…”

Section: Introductionmentioning

confidence: 99%

PWM Control Techniques for Single-Phase Multilevel Inverter Based Controlled DC Cells

Sayed¹,

Ahmed²,

Elsheikh³

et al. 2016

Journal of Power Electronics

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This paper presents a single-phase five-level inverter controlled by two novel pulse width modulation (PWM) switching techniques. The proposed PWM techniques are designed based on minimum switching power loss and minimum total harmonic distortion (THD). In a single-phase five-level inverter employing six switches, the first proposed PWM technique requires four switches to operate at switching frequency and two other switches to operate at line frequency. The second proposed PWM technique requires only two switches to operate at switching frequency and the rest of the switches to operate at line frequency. Compared with conventional PWM techniques for single-phase five-level inverters, the proposed PWM techniques offer high efficiency and low harmonic components in the output voltage. The validity of the proposed PWM switching techniques in controlling single-phase five-level inverters to regulate load voltage is verified experimentally using a 100 V, 500 W laboratory prototype controlled by dspace 1103.

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A multilevel PWM inverter topology for photovoltaic applications

Cited by 114 publications

References 13 publications

Comparison Study and Simulation of the Main Multilevel Inverter Topologies for Different Output Voltage Levels

Comparison Study and Simulation of the Main Multilevel Inverter Topologies for Different Output Voltage Levels

Comparative Study of Three Phase Grid Connected Photovoltaic Inverter Using PI and Fuzzy Logic Controller with Switching Losses Calculation

PWM Control Techniques for Single-Phase Multilevel Inverter Based Controlled DC Cells

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