Quasi Z-Source Network-Based Photovoltaic Supported STATCOM for Voltage and Frequency Control of Stand-Alone WECS

Jeyanthi, S.; Krishnamoorthi, K.

doi:10.1142/s0218126622500037

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…This control method enhances voltage synchronisation and power quality. To balance a reactive power challenges of SEIG under load disturbances, a modified second-order generalised integrator (SOGI) with quasi-impedance (QZ) STATCOM is employed in [24]. It has been suggested that a quasi impedance source based STATCOM with FLC will improve the active power flow.…”

Section: Introductionmentioning

confidence: 99%

Reduced switch cascaded asymmetrical 27 level inverter-STATCOMwith fuzzy logic controller

Ramesh,

Govindaraj,

Raman

et al. 2023

IJEECS

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<p>In this study, a 27-levelinverter with a reduced switch asymmetrical cascaded H-bridge (CHB) with fuzzy logic controller (FLC) is proposed. With series connections, a low voltage converter, a middle level voltage converter, and a high voltage converter make up the static synchronous compensator (STATCOM). The configuration of the asymmetrical inverter uses trinary DCsources. To acquire switching signals for the trinary inverter-based STATCOM to compensate for real power, load voltage, reactive power, load current, and power factor under load changing conditions, FLC is constructed. With fewer switches, the suggested arrangement produces greater voltage levels. The performance of the reduced switch asymmetrical cascaded H-bridge inverter-STATCOM with FLCis simulated using the MATLAB Simulink platform under both static and dynamic load conditions. When compared to reduced switch asymmetrical cascaded H-bridge inverter-STATCOM with traditional proportional integral (PI) controller, the FLC result demonstrates efficient unbalanced load compensation. The FLC in the proposed inverter also lowers the total harmonic distortion.</p>

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Section: Introductionmentioning

confidence: 99%

Reduced switch cascaded asymmetrical 27 level inverter-STATCOMwith fuzzy logic controller

Ramesh,

Govindaraj,

Raman

et al. 2023

IJEECS

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“…Among all the resources, PV is the most popular because of its characteristics like easily available in worldwide, and easy to install and maintain [3]. Many governments around the world provide supports to encourage people to install PV on the roofs of their homes [4][5][6]. Moreover, some of the companies have set up solar panels for the consumption of energy and supply the energy to grid [7].…”

Section: Introductionmentioning

confidence: 99%

Power Harvesting Enhancement from PV array and Power Quality Improvement in Grid Connected PV Interleaved Inverter Using Hybrid LSE-WHO Approach

Vidhya¹,

Krishnamoorthi²

2022

Preprint

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This manuscript proposes a hybrid approach for multi-functional grid connected photovoltaic (PV) interleaved inverter using power quality improvement. The proposed approach is a combination of Spherical Evolution Search Algorithm (LSE) and Wild Horse Optimizer (WHO), therefore it is called LSE-WHO approach. The main objective of the proposed approach reduces DC voltage fluctuation and improves power quality. The interleaved inverter is utilized at the grid side, which consists of four legs and every leg contains a power electronic switch and a diode. Due to the configuration of interleaved inverter shoot-through effect is overcome. The system performance is enhanced by the utilization of interleaved inverter. The proposed approach operation is classified into 2 parts such as power harvesting and the harmonics reduction. The LSE approach is utilized to extract the maximum power of PV and the WHO approach is utilized to reduce the harmonics distortion and eliminated the DC link voltage fluctuation through double band hysteresis current controller (DBHCC). DBHCC provides lesser switching frequency, hence, the switching losses is low. By then, the LSE-WHO approach is implemented in the MATLAB site, its performance is compared to the existing approaches. From the simulation, it is conclude that the LSE-WHO approach provides the THD as 2.12% and increase the power quality.

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“…Generally, an inverter is utilized to feed the grid by the PV. 5,6 Voltage source inverter is one with simple construction, development, and control. [7][8][9] So it is the most preferable inverter.…”

Section: Introductionmentioning

confidence: 99%

A hybrid technique for optimal power quality enhancement in grid-connected photovoltaic interleaved inverter

Vidhya¹,

Krishnamoorthi²

2022

Energy & Environment

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A grid-connected photovoltaic (PV) system with interleaved inverter using a hybrid approach is presented in the paper. Generally, high deviation of DC voltage causes severe damage to the grid-linked system generate power quality issues. Therefore, a hybrid technique called LA-HBO, which is a combination of Lichtenberg optimization algorithm (LA) and heap-based optimizer, is proposed. The proposed method works with the interleaved inverter to realize a multifunctional operation and improve the power quality efficiency of the system. Here, LA techniques improve the power generated from PV and self-charging of the DC-link voltage control loop. The reference current signal is generated through the self-charging DC-link voltage control loop to eliminate the power quality issues. The double band hysteresis current controller generated a minimum switching frequency to provide low switching losses. A MATLAB platform is utilized to implement the proposed system, and the performance of the system is compared with other existing techniques. The test result validated that the proposed system can able to perform multilevel functions and produce power with high quality compared to other techniques. The value for the THD that achieves the proposed hybrid technique is 21.22%. The elapsed time of the proposed hybrid technique is 2.09 seconds.

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Quasi Z-Source Network-Based Photovoltaic Supported STATCOM for Voltage and Frequency Control of Stand-Alone WECS

Cited by 6 publications

References 21 publications

Reduced switch cascaded asymmetrical 27 level inverter-STATCOMwith fuzzy logic controller

Reduced switch cascaded asymmetrical 27 level inverter-STATCOMwith fuzzy logic controller

Power Harvesting Enhancement from PV array and Power Quality Improvement in Grid Connected PV Interleaved Inverter Using Hybrid LSE-WHO Approach

A hybrid technique for optimal power quality enhancement in grid-connected photovoltaic interleaved inverter

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