Improved Selective Frequency Active Damping for Voltage Source Inverter With Output $LC$ Filter

Tolani, Sanjay; Gautam, Vasav; Sensarma, Parthasarathi

doi:10.1109/tia.2020.3004755

Cited by 17 publications

(8 citation statements)

References 21 publications

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“…The chief drawback of this scheme is too many gains to be set. A selective frequency active damping scheme by means of the filter inductor current feedback has been addressed in [36]. However, the study on the impact of parameter variations which can impressively threaten the controller operation was overlooked.…”

Section: Introductionmentioning

confidence: 99%

Model‐based control of four‐leg inverter for UPS applications considering the effect of neutral line inductor

Seyedalipour

Shahparasti

Hajizadeh

et al. 2021

IET Power Electronics

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A control approach for three-phase four-leg LC-filtered voltage source inverters (VSIs) is proposed for an uninterruptible power supply (UPS) application. A filter inductor in the fourth (neutral) leg of the VSI is considered to enhance the output voltage quality when feeding different types of loads in such a system. The proposed approach is based on the modelling of UPS VSI system in the dq0 synchronous frame. First, the switching functions of the inverter under study are extracted from the achieved system model. Afterward, the control approach is developed by introducing a virtual time constant, which simultaneously affects the system's damping ratio, and a virtual undamped natural frequency in the switching functions. It offers flexibility for improving the system dynamic and steady-state responses as desired. While the final time constant decreases the transient response time and overshoot, the resulting undamped natural frequency leads to alleviation of steadystate error in the output voltage. The performance of the proposed control approach is evaluated via SIMULINK-based and real-time simulation results.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Model‐based control of four‐leg inverter for UPS applications considering the effect of neutral line inductor

Seyedalipour

Shahparasti

Hajizadeh

et al. 2021

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…7,8 In addition to this problem, it is also necessary to pay attention to the high frequency harmonics caused by the switches. 9 Due to the clamping effect of the DC voltage source, the waveform of the output voltage of the H-bridge is rectangular wave, and its total harmonic distortion (THD) is very high. Therefore, it is necessary to connect a filter to improve the quality of output power.…”

Section: Introductionmentioning

confidence: 99%

“…16 However, this method will increase the system loss and reduce the efficiency of the equipment. 9,17 Different from passive damping method, active damping method usually uses capacitor current of LCL filter as a feedback term to achieve closed-loop control. By introducing virtual resistors to the system, as a result, the additional losses are avoided.…”

Section: Introductionmentioning

confidence: 99%

“…By introducing an impedance network into the circuit, the impedance source topology represented by the Z‐source inverter (ZSI/qZSI) has been rapidly developed, and many experts and scholars have proposed other novel high‐gain converters with better performance 7,8 . In addition to this problem, it is also necessary to pay attention to the high frequency harmonics caused by the switches 9 . Due to the clamping effect of the DC voltage source, the waveform of the output voltage of the H‐bridge is rectangular wave, and its total harmonic distortion (THD) is very high.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, passive damping can suppress the resonance peak by introducing resistance into the circuit 16 . However, this method will increase the system loss and reduce the efficiency of the equipment 9,17 . Different from passive damping method, active damping method usually uses capacitor current of LCL filter as a feedback term to achieve closed‐loop control.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parameter optimization design and performance analysis of filter‐integrated switched boost grid‐connected inverter

Liu

et al. 2021

Circuit Theory & Apps

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This paper proposes a filter-integrated switched boost grid-connected inverter by coupling switched boost network between inverter bridge and power grid, which can effectively solve the inherent resonance peak problem of LCL filter. Meanwhile, the proposed topology can realize boost function at AC side, which can effectively avoid the problem of excessive voltage stress caused by the boost at the DC side. Due to the design of the parameters in the control system will affect the effect of resonance spike damping, it will also affect the harmonic content of the grid-connected current. Based on the stability margin and steady-state error of the system, combined with the characteristics of the system regulator, the parameter selection area that meets the system requirements is drawn in this paper, and the optimization of the system parameter design method is realized. Finally, the function of the circuit is verified by building an experimental platform.

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An active damping control strategy with improved transient performance for high‐frequency AC power distribution in intelligent vehicles

Zhou

Liu

Zhang

et al. 2023

Circuit Theory & Apps

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SummaryHigh‐frequency AC (HFAC) LCLC resonant inverter has recently received more and more attention in power distribution system (PDS) of intelligent vehicles. However, LCLC resonance complicates the design of a current control loop and can even threaten the stability and transient performance of PDS. Active damping (AD) strategies based on the feedback of a single filter voltage or current have been shown to be effective and cost‐efficient method for attenuating resonant spikes. In this paper, a notch filter‐based AD (NFAD) control strategy is proposed to improve the stability and transient performance of PDS for intelligent vehicles. By sensing and feeding back the output resonance current of LCLC resonant inverter, the NFAD control strategy is then formulated to emulate a virtual impedance in order to improve the system phase margin and crossover frequency. Hence, the proposed control strategy can not only suppress the LCLC double resonance peaks but also effectively improve the transient performance of resonant inverter while guaranteeing the stability of the system. Finally, an experimental prototype was established and tested to verify the effectiveness of the proposed control strategy with a rated output power of 130 W, an operation frequency of 25 kHz, and a sinusoidal output voltage of 28 V (rms).

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Improved Selective Frequency Active Damping for Voltage Source Inverter With Output $LC$ Filter

Cited by 17 publications

References 21 publications

Model‐based control of four‐leg inverter for UPS applications considering the effect of neutral line inductor

Model‐based control of four‐leg inverter for UPS applications considering the effect of neutral line inductor

Parameter optimization design and performance analysis of filter‐integrated switched boost grid‐connected inverter

An active damping control strategy with improved transient performance for high‐frequency AC power distribution in intelligent vehicles

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