Inductor Saturation Compensation With Resistive Decoupling for Single-Phase Controlled VSC Systems

Özkan, Ziya; Hava, Ahmet M.

doi:10.1109/tpel.2019.2918174

Cited by 10 publications

(10 citation statements)

References 19 publications

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“…When the current dc-bias is zero, the rise time is approximately 3-4 ms whereas when the d-axis current dc-bias level is 10 A, the rise time of the CSCC method is around 1 ms. This bandwidth shrinkage phenomenon in 3P3W VSCs with CSCC is similar to the case that of single-phase controlled VSCs under dc excitation [8], [23].…”

Section: B Dynamic Responsesupporting

confidence: 65%

“…Considering the d-axis to d-axis and q-axis to q-axis magnitude plots in Fig. 5 (a) and (b) for θ = 0 and θ = π/3 under fullload operation, the d-axis bandwidth (ω BW −dd ) and q-axis bandwidth (ω BW −qq ) are observed to be much smaller than the design bandwidth ω BW which is called bandwidth shrinkage [8], [23] and elaborated in [7]. Moreover, the phase responses in Fig down to 62 degrees decreasing the robustness of the stability of the closed-loop current control system [22].…”

Section: A Command To Output Characteristicsmentioning

confidence: 99%

“…7(c), the L-i characteristics of saturable inductors employed as converter side inductors are illustrated. These characteristics are obtained from experimental measurements as performed in [8] and used for analyses, simulations, and the implementation of experimental inverse system dynamics. The selected core is deeply saturated so that the inductance is decreased with the increase in the current down to 1/9 th of the initial value.…”

Section: A Simulated System Configurationmentioning

confidence: 99%

“…In [21], such correlation is demonstrated for 3P3W VSCs exhibiting linear system characteristics via frequency response functions. On the other hand, for VSCs employing saturable inductors, the dynamic response can still be utilized as an indicator of the system bandwidth as a function of time; wherein [8], [23], such a utilization has already been performed and verified for single-phase VSCs with saturable inductors. In this study, a similar approach is adapted to analyze 3P3W VSC systems employing saturable inductors.…”

Section: Introductionmentioning

confidence: 99%

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Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-II

Özkan¹,

Hava²

2020

Preprint

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Current waveform quality and current control bandwidth are the figures of merit for current controllers in three-phase three-wire (3P3W) voltage-source converter (VSC) systems. When saturable inductors are employed as converter side inductors due to cost, size, and energy conversion efficiency benefits in 3P3W VSCs with conventional synchronous frame current control (CSCC); substantial drawbacks arise by means of these figures of merit. In the preceding part of this study, an inverse dynamic model based compensation (IDMBC) method has been proposed to deal with these drawbacks. Complementarily, this paper presents a thorough analytical investigation of the control system characteristics of CSCC and IDMBC methods that affect the current waveform quality and current control bandwidth. The analyses are verified via dynamic response and waveform quality simulations and experiments that employ saturable inductors reaching $1/9^{th}$ of the zero-current inductance at full current. The results obtained demonstrate the suitability of the IDMBC method for 3P3W VSCs employing saturable inductors.

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Section: B Dynamic Responsesupporting

confidence: 65%

Section: A Command To Output Characteristicsmentioning

confidence: 99%

Section: A Simulated System Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-II

Özkan¹,

Hava²

2020

Preprint

Self Cite

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“…Recent studies [14][15][16] showed that it was possible to design smaller and lighter SMPS by exploiting ferrite-core inductors operating in partial saturation. In this situation, the inductance drops as the inductor current increases, with a strong dependence on the core temperature (at higher temperatures, the inductance starts dropping for lower current values).…”

Section: Introductionmentioning

confidence: 99%

Online Estimation of the Current Ripple on a Saturating Ferrite-Core Inductor in a Boost Converter

Lodi

Oliveri

2020

Sensors

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In this paper, a nonlinear observer is proposed for the estimation of the current ripple in a ferrite-core inductor working in partial saturation, mounted on a boost converter. The estimator is based on a recently proposed nonlinear inductance model, which expresses the inductance as a function of the inductor current, taking into account also the non-negligible effects of the core temperature. The proposed observer is implemented on a low-cost microcontroller and tested, both offline and online, on a real boost converter with different operating conditions. The offline tests show a satisfactory estimation accuracy both during the electrical (fast) and thermal (slow) transients. Due to the high microcontroller latency, some delays and inaccuracies occur during electrical transients in the online tests. This work suggests that, in order to exploit the observer for control purposes, the target architecture should be a high-performance microcontroller, a system-on-chip, or a field programmable gate array, where parallelism can be exploited to speed-up the computations. The proposed implementation can be instead suitable for switch-mode power supply (SMPS) monitoring purposes.

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Virtual Memristor Based Control to Improve Power Converter Stability Under Extreme Large Range of Parameter Uncertainty

Song

Shi

2022

2022 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Inductor Saturation Compensation With Resistive Decoupling for Single-Phase Controlled VSC Systems

Cited by 10 publications

References 19 publications

Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-II

Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-II

Online Estimation of the Current Ripple on a Saturating Ferrite-Core Inductor in a Boost Converter

Virtual Memristor Based Control to Improve Power Converter Stability Under Extreme Large Range of Parameter Uncertainty

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