A novel voltage boosting switched‐capacitor 19‐level inverter with reduced component count

Gupta

2022

Circuit Theory & Apps

Renewable energy sources employ a power conditioning unit for injecting power into the grid. Such resources of small capacity are characterized by low generated voltage and thus require a high voltage boost at the inversion stage. This paper proposes a novel transformer‐less, single‐phase grid‐connected, 13‐level inverter to yield the voltage boost. The presented topology is realized through 12 unidirectional switches, 2 diodes, and 3 capacitors. A single‐stage circuit synthesizes 13 levels with a single input source and yielding an overall voltage gain of six. The adapted modulation technique is robust enough to keep the capacitors self‐balanced for all values of the modulation index. The proposed topology is modular and cost‐effective in comparison to other similar typologies due to reduced device count and space requirement. The presented topology is validated experimentally with satisfactory operation in yielding input voltage boost by a factor of six.

Section: Comparision With Other Multilevel Topologiesmentioning

confidence: 99%

“…Proposed SC-MLI worked in an asymmetric charging state and uses only three capacitors. The topologies [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] generate different voltage levels and use single or multiple DC sources. Topologies [13][14][15] are operated with seven-level, where previous works 13,14 have the gain of 1.5.…”

mentioning

confidence: 99%

A novel step‐up topology for multilevel power conversion

Gupta

2022

Circuit Theory & Apps

“…Nowadays, multi-level inverters (MLI) play an important role in modern power systems and have many advantages, such as avoiding high-voltage stress under high switching frequency operation and producing output voltage with low total harmonic distortion [1][2][3][4]. Therefore, the research and application of multilevel inverters are continuing [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Thirteen-Level Switching Capacitor Inverter with Six Times Boost and Self-Balancing Capability

et al. 2023

Electronics

A thirteen-level inverter based on switching capacitor is proposed in order to improve the boost capacity and output power quality of inverter in renewable energy power generation system. The proposed topology is composed of one DC input power supply, three capacitors and 14 switching devices, and achieves thirteen-level output with six times voltage boost. It has smaller volume, lower cost and output harmonic content. Moreover, it can realize inverter without H bridge and reduce the voltage stress of switching tube. In addition, the proposed inverter can achieve self-balancing capacitor voltage without any auxiliary method, simplifying the complexity of control. The superiority of the proposed topology is verified by comparing with other traditional multilevel inverters. The simulation and experimental verification on the simulation and prototype platform show that the inverter has good performance in both steady and dynamic conditions.

IET Renewable Power Gen

“…With the increase in the number of levels, the harmonic content reduces in the output voltage. To utilize the benefits of higher voltage levels as mentioned above, authors in [16] have proposed a nineteen‐level inverter and a twenty‐five level inverter is presented in [17].…”

Section: Introductionmentioning

confidence: 99%

Grid‐connected operation and control of single‐phase asymmetrical multilevel inverter for distributed power generation

Tayyab

Sarwar

Murshid

et al. 2022

Self Cite

In recent times, multilevel inverters (MLIs) are gaining popularity for grid integration of distributed power generation sources. In this paper, a proportional‐resonant (PR) controller based on current control logic is proposed for a single‐phase eleven‐level inverter topology, enabling the integration of distributed power generation sources into the grid. The presented topology utilizes eight two‐quadrant switches and three dc sources to produce an eleven‐level output voltage. The level‐shifted pulse width modulation (LS‐PWM) scheme is used for providing switching signals to the inverter under grid‐connected operation. Simulation and real‐time results are presented for the eleven‐level inverter to validate the presented current control logic under the grid‐connected mode of operation. The hardware‐in‐loop emulator (Typhoon HIL‐402) is used for taking real‐time results of the presented grid‐connected topology. The total harmonic distortion (THD) of the eleven‐level inverter voltage and grid current is 12.10% and 0.46%, respectively. The efficiency of the inverter while supplying 2 kW active power to the grid is 98.4%.