Review and Simulation of Fixed and Adaptive Hysteresis Current Control Considering Switching Losses and High-Frequency Harmonics

Vahedi, Hani; Sheikholeslami, Abdolreza; Bina, Mohammad Tavakoli; Vahedi, Mahmood

doi:10.1155/2011/397872

Cited by 47 publications

(31 citation statements)

References 7 publications

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“…Hysteresis algorithms [20,73] are well known for their simple implementation features. They operate by comparing the resulted current error with a hysteresis band.…”

Section: Hysteresis Current Controlmentioning

confidence: 99%

“…However, fixed-band hysteresis algorithms suffer from high switching frequency variations which cause audible noise and increased switching losses [75,76]. In order to avoid this situation, adaptive-band hysteresis algorithms [46,73,75] with variable hysteresis bands have been proposed. The hysteresis band varies according to the desired reference current to provide the SAPF with a fixed switching frequency [75,77].…”

Section: Hysteresis Current Controlmentioning

confidence: 99%

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Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

et al. 2017

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Current harmonics is one of the most significant power quality issues which has attracted tremendous research interest. Shunt active power filter (SAPF) is the best solution to minimize harmonic contamination, but its effectiveness is strictly dependent on how quickly and accurately its control algorithms can perform. This manuscript reviews various types of existing control algorithms which have been employed for controlling operation of SAPF. Harmonic extraction, DC-link capacitor voltage regulation, current control and synchronizer algorithms are examined and discussed. The most relevant techniques which have been applied for each control algorithm are described and contrasted in an organized manner to identify their respective strengths and weaknesses. It is found that the applied control algorithms differ in two conditions: (1) the condition where harmonic current distortion is treated by the SAPF in the presence of non-ideal source voltage; and (2) the condition where multilevel inverter is employed as the circuit topology of SAPF.

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“…Hysteresis algorithms [20,73] are well known for their simple implementation features. They operate by comparing the resulted current error with a hysteresis band.…”

Section: Hysteresis Current Controlmentioning

confidence: 99%

Section: Hysteresis Current Controlmentioning

confidence: 99%

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

et al. 2017

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“…In [30] the single-loop current sensorless control is being proposed, which is based on digital current rebuilding approach and uses input and output voltage values as well as predefined circuit parameters (inductor and capacitor precise values) to estimate instantaneous inductor current value. The fixed and variable switching frequencies are used in the above mentioned articles, however, according to [31], the constant frequency reduces switching losses in comparison with variable frequency control, as well as reduces high-frequency components.…”

Section: Description Of Topologymentioning

confidence: 99%

Current Sensorless Control of Front-end Bidirectional AC/DC Converter Based on Half-bridge Topology

Suzdalenko¹

2013

Electrical, Control and Communication Engineering

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-Electrical grid modernization concept promotes the use of DC subgrids in order to improve efficiency, minimizing energy conversion count in the source-to-load chain. The present paper discusses an average current sensorless control algorithm for proposed bidirectional AC/DC converter, which is based on a dual half-bridge topology with common neutral wire that is not commutating during converter operation. The proposed current sensorless control algorithm has been obtained analytically for rectification, grid-tied and stand-alone inverter modes. The average value of inductor current tracks the reference current signal with constant switching frequency. Two control functions for inductor's discontinuous and continuous current modes have been defined for each of the operation modes, and a sensorless transition between DCM and CCM modes has been stated. The proposed sensorless control algorithm has been also adapted for use with LCL input filter. The results of simulation in the PSIM software approved the analytical model, keeping the average inductor current to follow the reference value in inductor discontinuous and continuous conduction modes. Experimental investigation of the proposed current control algorithm provided similar results confirming the discussed theory.

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“…For example, frequency converters produce a vast range of harmonics components that reduce the delivered energy quality and increase power losses with low reliability in power systems that result in the need for filtering devices [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Weighting Method to Identify Interharmonics based on Calculating the Bandwidth in Group-Harmonics

Vahedi¹,

Kiapi²,

Bina³

et al. 2013

Journal of Power Electronics

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Power converters produce a vast range of harmonics, subharmonics and interharmonics. Harmonics analyzing tools based on the Fast Fourier Transform (FFT) assume that only harmonics are present and the periodicity intervals are fixed, while these periodicity intervals are variable and long in the presence of interharmonics. Using FFT may lead to invalid and undesired results due to the above mentioned issues. They can also lead to problems such as frequency blending, spectral leakage and the picket-fence effect. In this paper, the group-harmonic weighting (GHW) approach has been presented to identify the interharmonics in a power system. Afterwards, a modified GHW has been introduced to calculate the proper bandwidth for analyzing the various values of interharmonics. Modifying this method leads to more precise results in the FFT of a waveform containing inter harmonics especially in power systems with a fundamental frequency drift or frequency interference. Numerical simulations have been performed to prove the efficiency of the presented algorithm in interharmonics detection and to increase the accuracy of the FFT and the GWH methods.

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Review and Simulation of Fixed and Adaptive Hysteresis Current Control Considering Switching Losses and High-Frequency Harmonics

Cited by 47 publications

References 7 publications

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

Current Sensorless Control of Front-end Bidirectional AC/DC Converter Based on Half-bridge Topology

Weighting Method to Identify Interharmonics based on Calculating the Bandwidth in Group-Harmonics

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