Unified time‐domain formulation of switching frequency for hysteresis current controlled AC/DC and DC/AC grid connected converters

Gautam, Shweta; Gupta, Rajesh

doi:10.1049/iet-pel.2012.0484

Cited by 23 publications

(17 citation statements)

References 28 publications

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“…Step 1: Initially, the hysteresis band scaling factor (h1) range is obtained as 0.01 to 0.1 by using the generalized instantaneous switching frequency formula reported in Reference [40] to get the lowest % THD at the reduced switching frequency (fsw).…”

Section: Proposed Mb-hccmentioning

confidence: 99%

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Scalable Single-Phase Multi-Functional Inverter for Integration of Rooftop Solar-PV to Low-Voltage Ideal and Weak Utility Grid

2019

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Integration of rooftop solar-PV (RTSPV) systems and extensive use of nonlinear loads in the low-voltage distribution system (LVDS) leads to poor power quality (PQ). Therefore, it is necessary to address the issues leading to poor PQ at the point of common coupling of the LVDS. In this article, a multi-band hysteresis current control (MB-HCC) for the multi-functional inverter (MFI) is proposed which improves the efficiency of the MFI and also enhances the PQ of the LVDS. The MB-HCC uses simple switching logic and outperforms in its multi-functional tasks such as active power injection and power conditioning. MB-HCC offers better efficiency over variable double-band HCC (VDB-HCC) as it operates at a lower switching frequency. The performance of the proposed system is simulated by using MATLAB/Simulink and validated by OPAL-RT based real-time simulation studies. During the variation of solar irradiation, the proposed MFI has an average efficiency of 98.5% under the ideal grid and 97.34% under the distorted grid. Moreover, the percentage of Total Harmonic Distortion under ideal and distorted grid conditions is brought down to below 5%, and also, reactive power compensation maintains unity power factor operation complying with the IEEE-519-2014 and 1547 standards. These results substantiate the hypothesis of scalability of the single-phase MB-HCC-based MFI for an LVDS contributing to economy and ecology.

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Section: Proposed Mb-hccmentioning

confidence: 99%

“…The instantaneous switching frequency values of the VDB-HCC and the proposed MB-HCC are calculated concerning the switching frequency formula given in Reference [40]. The instantaneous average switching frequency of the MFI using MB-HCC was maintained at 10 kHz, whereas the VDB-HCC [30] had 16 kHz under nonlinear load conditions.…”

Section: Switching Frequencymentioning

confidence: 99%

Scalable Single-Phase Multi-Functional Inverter for Integration of Rooftop Solar-PV to Low-Voltage Ideal and Weak Utility Grid

2019

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“…Variable-frequency CMC methods are a good choice to overcome the issue of subharmonic oscillations. Hysteresis CMC (HCMC) [21,22] is one of the most frequently used variablefrequency methods. It has excellent features, including no slope compensation, no subharmonic oscillations, and zero peak-to-average current error.…”

Section: Introductionmentioning

confidence: 99%

A modified dual current mode control method with an adaptive current bandwidth

Lale

Šoja

Lubura

2015

Circuit Theory & Apps

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SUMMARYIn this paper, a new adaptive dual current mode control method (ADCMC) is presented, being a result of the modification of existing dual current mode control (DCMC) by introducing an adaptive current bandwidth. The ADCMC offers several important advantages over DCMC, such as no peak-to-average error in the inductor current, better transient response of current loop, and improved line regulation. A detailed analysis of the proposed ADCMC is performed for three types of DC-DC power electronics converters: buck, boost, and non-inverting buck-boost converter. The performances of the ADCMC are tested with simulations and experiments. The obtained results confirm the analysis and validity of the proposed ADCMC method.

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“…The switching frequency of hysteresis current control is not constant in a cycle of power frequency, which leads to the electromagnetic interference (EMI) problem and the dead zone for zero-crossing current. At the same time, the hysteresis width has great influence on switching frequency and system performance [11]. OCC is a modulation and control technique [12].…”

Section: Introductionmentioning

confidence: 99%

Application of Improved Bridgeless Power Factor Correction Based on One-cycle Control in Electric Vehicle Charging System

Chen

Zhou

Dai

et al. 2014

Electric Power Components and Systems

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Unified time‐domain formulation of switching frequency for hysteresis current controlled AC/DC and DC/AC grid connected converters

Cited by 23 publications

References 28 publications

Scalable Single-Phase Multi-Functional Inverter for Integration of Rooftop Solar-PV to Low-Voltage Ideal and Weak Utility Grid

Scalable Single-Phase Multi-Functional Inverter for Integration of Rooftop Solar-PV to Low-Voltage Ideal and Weak Utility Grid

A modified dual current mode control method with an adaptive current bandwidth

Application of Improved Bridgeless Power Factor Correction Based on One-cycle Control in Electric Vehicle Charging System

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