Effect of sampling frequency and execution time on hysteresis current controlled three-phase three-wire HAPF converters

Durna, Emre

doi:10.1109/speedam.2016.7525968

Cited by 4 publications

(3 citation statements)

References 36 publications

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“…11 shows the block diagram comprising every step of the process. First, a sampled HBCC is used to inject harmonic currents into the grid, which is digitally implemented by comparing the current error

normalΔ i

with the hysteresis band

δ

[30], selected as 1% of the operational current, and then the switches

S_{+}

and

S_{-}

are turned on or off accordingly. Then, phase voltage

v_{a, inv}

is measured at the converter's output along with the current

i_{a}

, and both signals go through a DFT algorithm to extract the desired harmonic components,

V_{h}

and

I_{h}

, as well as the respective phases,

θ_{V_{h}}

and

θ_{I_{h}}

.…”

Section: Proposed Methodologymentioning

confidence: 99%

VSC plug‐and‐play operation using online grid parameter estimation for PI self‐tuning

Alves

Rolim

Dias

et al. 2020

IET power electron.

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This work presents a plug‐and‐play solution for voltage source converters controlled by proportional–integral controllers to automatically operate connected to a previously unknown grid. The methodology consists of an initial operation using hysteresis band current control in order to synthesise harmonic currents, which are used for online grid parameter estimation, allowing the proper analytical tuning of the controllers using the grid's equivalent model. The method is firstly simulated and then validated through experimental results using Texas Instruments TMS320F28377S Digital Signal Processor and BOOSTXLDRV8305‐EVM static converter.

show abstract

normalΔ i

with the hysteresis band

δ

[30], selected as 1% of the operational current, and then the switches

S_{+}

and

S_{-}

are turned on or off accordingly. Then, phase voltage

v_{a, inv}

is measured at the converter's output along with the current

i_{a}

, and both signals go through a DFT algorithm to extract the desired harmonic components,

V_{h}

and

I_{h}

, as well as the respective phases,

θ_{V_{h}}

and

θ_{I_{h}}

.…”

Section: Proposed Methodologymentioning

confidence: 99%

VSC plug‐and‐play operation using online grid parameter estimation for PI self‐tuning

Alves

Rolim

Dias

et al. 2020

IET power electron.

View full text Add to dashboard Cite

show abstract

“…In Fig. 1 c , filter current is shown to change linearly after each switching instant by taking into consideration of Assumption 2. Assumption 2 (linear LC filter response and fast control hardware assumption): Execution time, T e , sampling period, T s and hysteresis band, Δ I , are small enough such that LC filter response can be considered linear [38, 43]. Also, the tracking error is negligible as compared to the hysteresis band because T e and T s are assumed to be small.…”

Section: Formulation Of Hysteresis Switching Behaviour Of Hapf Convmentioning

confidence: 99%

“…Fortunately, the THD value of the proposed method is still below the allowed limits, 5%, in standards [49] throughout the measurement period. The performance of the proposed method can also be optimised with the use of more powerful processors by increasing the computational capabilities and the sampling frequency [43].…”

Section: Field Implementationmentioning

confidence: 99%

Adaptive fuzzy hysteresis band current control for reducing switching losses of hybrid active power filter

Durna

2018

IET Power Electronics

Self Cite

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Although hysteresis band current control is an easy to implement and robust control method for industrial power electronics converters, it has also some disadvantages like variable and high switching frequency causing high switching losses. In this study, a novel adaptive fuzzy hysteresis band current control system is proposed by making use of fuzzy expressions of both hybrid active power filter (HAPF) current and integral of its harmonic components to reduce the switching losses of threephase three-wire two-level HAPF. To reach this aim, a relation between switching frequency and integral of filter current harmonic components is formulised and used for defining a fuzzy hysteresis band. Moreover, the magnitude of the instantaneous current switched is also correlated to the switching losses; in this way, its fuzzy expression is also used for defining hysteresis band. Those fuzzy expressions are then utilised to constitute a dynamically changing hysteresis bandwidth. The proposed control system is finally optimised using EMTDC/PSCAD simulation environment and implemented in the field. The implemented HAPF system has been shown to successfully suppress all the interharmonic and harmonic current components produced by a steel melting facility occupying three induction melting furnaces and it has provided around 9% reduction in overall losses.

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Online Impedance Estimation for Voltage Source Converters through the Discrete Fourier Transform

Alves

Rolim

Dias

et al. 2021

J Control Autom Electr Syst

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Effect of sampling frequency and execution time on hysteresis current controlled three-phase three-wire HAPF converters

Cited by 4 publications

References 36 publications

VSC plug‐and‐play operation using online grid parameter estimation for PI self‐tuning

VSC plug‐and‐play operation using online grid parameter estimation for PI self‐tuning

Adaptive fuzzy hysteresis band current control for reducing switching losses of hybrid active power filter

Online Impedance Estimation for Voltage Source Converters through the Discrete Fourier Transform

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