A novel design of 9 level cascade multi-level inverter for decoupled double synchronous reference frame in state delay controller

Sengolrajan, T.; Kalaivani, C.; Ashok, J.; Manikandan, A.

doi:10.1016/j.jer.2023.100106

Journal of Engineering Research

2023

DOI: 10.1016/j.jer.2023.100106

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A novel design of 9 level cascade multi-level inverter for decoupled double synchronous reference frame in state delay controller

T. Sengolrajan¹,

C. Kalaivani²,

J. Ashok³

et al.

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Cited by 8 publications

References 22 publications

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2DOF‐FOPID‐IF control with improved sparrow modulation for cascaded H‐bridge multilevel inverter in PV applications

Ahmad,

Qinglei

2024

Circuit Theory & Apps

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SummaryPhotovoltaic (PV) systems benefit from the cascaded H‐bridge multilevel inverter (CHMLI) topology due to its high flexibility and efficiency. However, PV mismatches in three‐phase grid‐connected systems result in an unbalanced power supply, which leads to an unbalanced grid current. Proportional integral derivative (PID) controllers can be used to control H‐bridge inverters because of their simplicity of tuning as well as their basic structure. However, due to the nonlinearity and high sensitivity of the PID controller, its performance declines as a result of high overshoot, high settling time, and high rise time during significant external disturbances. Moreover, the switching angle of the inverter must be adjusted to provide the required fundamental voltage while reducing harmonic content. In order to address this problem, a control technique with modulation compensation is proposed. The present work offers a two‐degree‐of‐freedom fractional‐order PID controller with an integrated filter (2DOF–FOPID–IF). Moreover, the optimum switching angles are determined for the CHMLI by employing an improved sparrow optimization (ISO) algorithm. To prove the practicality of the suggested technique, simulation, and experimental data are compared with the existing techniques. The proposed technique shows better performance in terms of settling time, overshoot, rise time, and low harmonics.

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2DOF‐FOPID‐IF control with improved sparrow modulation for cascaded H‐bridge multilevel inverter in PV applications

Ahmad,

Qinglei

2024

Circuit Theory & Apps

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Enhancing grid‐connected solar PV systems with a novel three‐phase hybrid multilevel inverter

Pushparaj,

Nattamai Balasubramanian

2024

Circuit Theory & Apps

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SummaryThis paper presents a novel three‐phase hybrid multilevel inverter (TPHMLI) designed for grid‐connected solar photovoltaic (SPV) systems. The TPHMLI combines series‐connected bridge topologies of half and full circuits to generate 11 stages of line load voltages, reducing the need for DC sources. It also introduces an improved pulse width modulation (PWM) approach, addressing computational challenges and high‐frequency triggering issues. Practical validation in a laboratory setting demonstrates the MLI's functionality and effectiveness. Furthermore, the advanced MLI topology successfully addresses design issues in grid‐integrated SPV structures, including power quality, efficiency, and reliability. It excels in managing reactive power and fault obstructive capabilities. Extensive simulations using MATLAB/Simulink confirm its superior performance, making it a promising solution for power conditioning units in grid‐connected solar PV systems. This research contributes to clean and sustainable energy conversion technologies, enhancing power quality and cost‐effectiveness, with significant potential for practical applications in the renewable energy sector.

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An optimized controller for novel asymmetrical 51-level inverter in hybrid solar and wind turbine-connected power system

Tyagi,

Bihari,

Chaurasia

et al. 2024

Electr Eng

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A novel design of 9 level cascade multi-level inverter for decoupled double synchronous reference frame in state delay controller

Cited by 8 publications

References 22 publications

2DOF‐FOPID‐IF control with improved sparrow modulation for cascaded H‐bridge multilevel inverter in PV applications

2DOF‐FOPID‐IF control with improved sparrow modulation for cascaded H‐bridge multilevel inverter in PV applications

Enhancing grid‐connected solar PV systems with a novel three‐phase hybrid multilevel inverter

An optimized controller for novel asymmetrical 51-level inverter in hybrid solar and wind turbine-connected power system

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