Nine-Level Inverter Based on Resonant Switched-Capacitor and NPP/NPC Unit

Ye, Yuanmao; Hua, Teke; Wang, Xiaolin

doi:10.1109/access.2021.3074141

Cited by 9 publications

(8 citation statements)

References 30 publications

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“…In Equation (40), f is the frequency of power grid. The total losses of the power switch S 1 which is equal to the summation of the conduction and switching losses can be achieved as follows:…”

Section: Current Stress During Negative Half-cyclementioning

confidence: 99%

“…Compared to other inverters, the SC-based MLIs can generate more voltage levels at the output and decrease the number of the needed DC supplies [36][37][38][39]. To obtain a higher number of produced output voltage levels with reduced circuit components, a new type of switched capacitor multilevel inverters have been presented in [40][41][42]. In these topologies a series-parallel switching method has been used so that these inverters can enhance the system flexibility by switching between several capacitors in series or parallel modes.…”

Section: Introductionmentioning

confidence: 99%

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A new transformer‐less common grounded five‐level grid‐tied inverter with leakage current elimination and voltage boosting capability for photovoltaic applications

Kurdkandi

Marangalu

Alavi

et al. 2023

IET Renewable Power Gen

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Due to serious Concerns such as air pollution, global warming, and fossil fuels shortcoming, renewable energy sources such as photovoltaic applications are dramatically being integrated into the power generation systems all of the world. Here, a new switched‐capacitor‐based transformer‐less grid‐tied inverter has been proposed. By applying the series–parallel switching technique of the utilized switched‐capacitor module, the voltage boosting capability has been obtained. By implementing common ground technique, high overall efficiency and leakage current elimination capability have been obtained. Since the proposed inverter provides a multi‐level output voltage, the total harmonic distortion of the injected grid current is reduced. The introduced control strategy has been implemented to control both active and reactive powers and generate the switches pulses. Therefore, a high quality and adjusted current is injected to the grid. This inverter requires a single renewable energy source as input DC source. Here, the comprehensive description of the proposed inverter and its performance with design considerations have been presented. The proposed structure has been compared with several similar structures and the obtained results have been investigated. To evaluate the performance of the proposed inverter, a 620 W laboratory prototype is assembled and experimental results are analyzed.

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Section: Current Stress During Negative Half-cyclementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new transformer‐less common grounded five‐level grid‐tied inverter with leakage current elimination and voltage boosting capability for photovoltaic applications

Kurdkandi

Marangalu

Alavi

et al. 2023

IET Renewable Power Gen

View full text Add to dashboard Cite

show abstract

“…In Niu et al, 27 although the number of switches is the same as the proposed topology, it requires more gate drivers and two DC sources. The topology illustrated in Ye et al 28 synthesizes 9‐level but is characterized by high

TSV

and the requirement of additional DC bus capacitors. The topologies in Ye et al and Lin et al 28,29 synthesize 9‐level but have high

TSV

.…”

Section: Introductionmentioning

confidence: 99%

A double boost 9‐level switched capacitor‐based multilevel inverter for photovoltaic applications

Agarwal

Gupta

Singh

2023

Circuit Theory & Apps

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Summary A self‐balancing 9‐level inverter is proposed in this paper. To generate a 9‐level voltage with a gain of two requires a single DC source, eight power switches, three capacitors, and two diodes. Without additional circuitry, the voltages of the capacitors in the proposed topology can achieve inherent balance. The peak‐inverse‐voltage (PIV) of six power switches equals or less than the source voltage, and the other two are twice. As power switches are complementary, the proposed topology requires fewer gate drivers. Furthermore, the self‐balancing capability of capacitors' voltage helps in simple control complexity. The description of topology, mode of operation, modulation strategy, and design of the capacitor of proposed topology are presented. The advantages of the proposed inverter are examined by comparing it with switched capacitor multilevel inverters (MLIs). Finally, a 9‐level prototype is built to verify the theoretical analysis and the practical efficacy of the proposed inverter.

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“…Similarly, Fig. 1(b) shows another nine-level boost inverter based on an SC and a T-type 3-level units presented in [17]. Both of these nine-level inverter structures are simple and require only 8 transistors.…”

Section: Introductionmentioning

confidence: 99%

“…(a) The nine-level inverter presented in [16]. (b) The nine-level inverter presented in [17]. (c) The proposed 17-level inverter.…”

Section: Introductionmentioning

confidence: 99%

Seventeen-Level Inverter Based on Switched-Capacitor and Flying-Capacitor-Fed T-type Unit

Rui-jie

Wang

2022

IEEE Access

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To use fewer components to construct a multilevel inverter (MLI) with more levels and high quality of the output voltage, a hybrid MLI is developed by combining a double-mode switched-capacitor (SC) unit with a T-type unit fed by flying capacitors (FCs). The SC unit is used to boost the amplitude of the output voltage to twice the dc input voltage, while the T-type unit is responsible for increasing the number of output levels. A total of ten transistors, four capacitors, and two diodes are used to generate 17 different levels. As two of the four capacitors are charged by a single dc source directly and the other two operate as FCs, there is no capacitor voltage ripple accumulation (CVRA) problem, resulting in high-quality output voltage. In addition to topology, a voltage balance controller of the FCs is developed to cooperate with the APOD-PWM strategy. Compared with other single-phase SC-based MLIs, the proposed inverter has a lower cost per level. Finally, to verify the feasibility of the proposed inverter, both the simulation model and experimental prototype are established. The results show that the proposed inverter has high-quality output voltage waveform and good dynamic response. The measured efficiency is above 96.5 for a wide range of loads, and the maximum value is up to 98.36. INDEX TERMSMultilevel inverter, switched-capacitor, flying capacitor. XIAOLIN WANG received the B.Sc. degree in electrical engineering and automation from Three Gorges University, Yichang, China, in 2012, and the M.Sc. and Ph.D. degrees from The

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Nine-Level Inverter Based on Resonant Switched-Capacitor and NPP/NPC Unit

Cited by 9 publications

References 30 publications

A new transformer‐less common grounded five‐level grid‐tied inverter with leakage current elimination and voltage boosting capability for photovoltaic applications

A new transformer‐less common grounded five‐level grid‐tied inverter with leakage current elimination and voltage boosting capability for photovoltaic applications

A double boost 9‐level switched capacitor‐based multilevel inverter for photovoltaic applications

Seventeen-Level Inverter Based on Switched-Capacitor and Flying-Capacitor-Fed T-type Unit

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