Design of Effective Passive Damping Resistor of Grid-Connected Inverter with LCL Filter for Industrial Applications

Jo, Jongmin; Cha, Hanju

doi:10.1007/s42835-019-00239-1

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…In [8,26,27], the proposed design of the damping resistor is primarily focused on the internal stability of the inner current control loop of the grid-connected LCL-filtered inverter, neglecting the external stability. In contrast, the research in [11] looked at the impact of varying grid impedance on the stability of an inverter connected to the grid.…”

Section: Comparison With Different Design Approachesmentioning

confidence: 99%

“…Another concern is the accuracy of the design approaches. For instance, in [11,27], a proposed range for the damping resistor is suggested; however, the minimum value that ensures the lowest loss and highest attenuation is not identified. It is necessary to fine-tune the damping resistor's value in [26] for it to work properly.…”

Section: Comparison With Different Design Approachesmentioning

confidence: 99%

“…In [26], the gain and phase margins of the current controller are employed to design the damping resistor. In [27], the damping resistor is designed to make the magnitude of the open‐loop transfer function 0 dB at the filter resonant frequency; however, the resulting value may not be sufficient to guarantee the internal stability of the VSI. Therefore, a range for the damping resistor is introduced to select the resistor value based on three criteria, the relationship between the crossover frequencies, the requirement of gain and phase margins, and minimum power loss.…”

Section: Introductionmentioning

confidence: 99%

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Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability

Ali,

Heydari‐doostabad,

Sajedi

et al. 2024

IET Power Electronics

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Grid‐connected inverters with an inductor–capacitor–inductor (LCL) filter usually require the implementation of damping in the filter to suppress the resonance associated with the filter and hence ensure internal stability. The value for the damping resistor is commonly chosen as one‐third of the capacitive reactance at the resonance frequency of the LCL filter. However, this commonly‐used principle does not take into account the external stability of the inverter, i.e. the potential for an interaction between the inverter output impedance and the grid impedance. This work discusses a new design for the damping resistor to assure the external stability of the voltage source inverter as well as its internal stability. The analysis shows that the proposed design can ensure the external stability of the voltage source inverter with different grid impedances as well as robustness against the variations of the filter parameters while maintaining low power losses and an acceptable attenuation rate for high‐frequency harmonics. To validate the theoretical analysis, a 1 kW, 110 V laboratory prototype is implemented. The obtained results confirm the applicability of the proposed design approach.

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Section: Comparison With Different Design Approachesmentioning

confidence: 99%

Section: Comparison With Different Design Approachesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability

Ali,

Heydari‐doostabad,

Sajedi

et al. 2024

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…Multilevel inverters produce staircase type output which is nearly sinusoidal, and the output is better than a conventional two-step version. Multilevel inverter offers several merits over the two-level inverter such as it can produce high output voltage at lower switching frequency, low voltage stress, Minimum Electromagnetic Inference (EMI), low Total Harmonic Distortion (THD) and reduced filter size [3]. 5-H Bridge Multi-Level Inverter (5-H BMI) can handle real as well as reactive power control.…”

Section: Introductionmentioning

confidence: 99%

Integrated Renewable Smart Grid System Using Fuzzy Based Intelligent Controller

Vijayal¹,

Krishnamoorthi²

2022

Intelligent Automation &Amp; Soft Computing

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In high power medium voltage applications, the utilization of 5-H Bridge Multi-Level Inverter (MLI) has grown vastly in recent years. The 5-H Bridge MLI can effectively control link voltage as well as power factor. However, the inverter imparts harmonics owing to the high switching frequency. Hence Inductance Capacitance Inductance (LCL) filter is implemented at its output to mitigate harmonics in presence of non-linear load. It's of highly important to choose LCL parameters wisely in order to attain good filtering effect. This work investigates the application of 5-H Bridge MLI with LCL filter at the output for efficient integration of renewable energy sources on to the grid. A modified fuzzy heuristic approach is used to solve LCL power filter optimization problem at output of 5-H Bridge Multi-Level Inverter. Subject to the constraint's harmonic distortion and losses of the inverter, multi objective optimization problem is solved to obtain LCL filter optimal values. The optimized LCL filter design was applied to a grid connected cascaded H-bridge MLI of rating 4.5 MW, 11 kV. MATLAB-Simulink is utilized for modelling and simulating the system. The results showed that the system is more efficient and generic. dSPACE Hardware in Loop (HIL) test system was used to verify the efficacy of the prototype system.

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“…Also, the changes in the capacitance and inductance of an LC filter deteriorate the sinusoidal output voltage. Therefore, over the past few decades, considerable researches [6]- [12] have been done on the voltage control techniques to achieve a fast dynamic response [6], robustness to parameter variations, zero tracking error, and low total harmonic distortion (THD) [7].…”

Section: Introductionmentioning

confidence: 99%

An Improved Sliding Mode Control Technique to Mitigate Mismatched Parameter Uncertainties of Three-Phase Voltage Source Inverters

et al. 2020

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This paper proposes a theoretical and experimental implementation of an advanced sliding mode control (SMC) for a three-phase voltage source inverter (VSI) to achieve robustness against the unknown uncertainties of an LC filter. The significant contributions of the proposed SMC are summarized as considerations for the matched and mismatched uncertainties of the LC filter, more relaxed normbounds, dynamic characterization of sliding surface, and unique stability analysis. Unlike the conventional SMC techniques with matched uncertainties, the mismatched uncertainties in the state matrix are taken for the design of the proposed SMC. Also, the relaxed norm-bound designed for matched and mismatched uncertainties allows a wide range of variations in the values of LC filter. The voltage tracking errors are significantly reduced and the total harmonic distortions (THDs) are highly suppressed by characterizing the sliding surface in terms of flexible linear matrix inequalities (LMIs). Next, the stability analysis and reachability conditions are given using the Lyapunov criterion. The authenticity of the proposed SMC method is proved by TMS320LF28335 DSP based experimental results with a prototype 1-kVA test-bed. The comparative experimental results and analysis for the proposed SMC scheme, the conventional SMC scheme, and the conventional PI−PI control scheme are presented under the load step change, unbalanced load, and non-linear load step change with the parameter uncertainties to demonstrate the excellent performance of the proposed controller such as fast transient response, small steady-state error, and low THD.INDEX TERMS Parameter uncertainties, sliding mode control (SMC), three-phase voltage source inverter (VSI), total harmonic distortion (THD).

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Design of Effective Passive Damping Resistor of Grid-Connected Inverter with LCL Filter for Industrial Applications

Cited by 11 publications

References 16 publications

Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability

Improved design of passive damping for single phase grid‐connected LCL filtered inverter considering impedance stability

Integrated Renewable Smart Grid System Using Fuzzy Based Intelligent Controller

An Improved Sliding Mode Control Technique to Mitigate Mismatched Parameter Uncertainties of Three-Phase Voltage Source Inverters

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