This paper proposes a novel approach to design the LCL filter for grid interfaced PV system. A cost based minimization approach on a cost per joule basis for each of the filter elements is explored to obtain the optimal filter design. Simulation results for a 10 KVA grid connected inverter with LCL filter are presented in order to verify the behavior of the proposed design. The impact of designed filter parameters on the ripple current is also discussed in the paper. The total inductance of the LCL filter is varied and filter parameter values which give lowest cost is identified while meeting harmonic standard requirements and the fundamental voltage drop across the filter. © 2016 IEEE.

Krishna Vasudevan

Department of Electrical Engineering

C. Poongothai

Bandpass filters

Power electronics

Cost minimization

Grid connected inverters

LCL FILTERS

OPTIMAL FILTER DESIGN

PV INVERTER

Selective harmonic elimination

STANDARD REQUIREMENTS

WEIGHTING FACTORS

Costs

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Design of LCL filter for grid-interfaced PV system based on cost minimization

IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2016

Many research works report the use of LCL filters for grid-interfaced PV systems. Indiscreet selection of passive LCL filter parameters may result in poor filtering and increased power losses. LCL filter parameter selection is critical to get a good performance and at the same time ensure that losses and costs stay low. This paper proposes a novel approach to design the LCL filter for a grid-interfaced PV system. A cost-based minimization approach on a cost per joule basis for each of the filter elements is explored to obtain the optimal filter design. Simulation results for a 10-kVA grid-connected inverter with an LCL filter are presented in order to verify the efficacy of the proposed design. The impact of designed filter parameters on the ripple current is also discussed in this paper. The total inductance of the LCL filter is varied and filter parameter values which give lowest cost is identified while meeting harmonic standard requirements and the fundamental voltage drop across the filter. Finally, the proposed design is also experimentally validated via a hardware prototype. Results validate the design method in terms of the harmonic attenuation and total harmonic distortion. © 2018 IEEE.

IEEE Transactions on Industry Applications

Grid-tied inverters and associated control techniques have gained importance in the domain of distributed generation. Different methods of control have been compared in the literature depending upon the ability to meet total harmonic distortion limits, damping offered to resonant oscillations, and stable operation. Multiple-loop methods compared to their single-loop counterparts have proved to be highly effective for meeting the grid regulations. In the literature, while single-loop and two-loop control systems for LCL filter have been assessed, not much study on three-loop control (TLC) has been done, possibly due to the hardware complexity and cost imparted by the increase in the number of sensors. In this paper, a TLC structure for grid connected inverters is analyzed for stability and parametric variations. Robustness of TLC is compared with single-loop grid current feedback control and a two-loop control structure. An approach to estimate the state variables is proposed in this paper, which cuts down the number of sensors and cost of implementation. The performance of the system is analyzed through simulations and results are validated in a hardware setup, under dynamic and steady-state conditions, thereby showing that this is a promising approach. © 1972-2012 IEEE.

Stability Analysis of Three-Loop Control for Three-Phase Voltage Source Inverter Interfaced to the Grid Based on State Variable Estimation

IEEE Transactions on Industrial Informatics

<italic>LCL</italic>-Filter Design for Robust Active Damping in Grid-Connected Converters

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

A novel LCL filter parameter design method basing on resonant frequency optimization of three-level NPC grid connected inverter

$LCL$ Filter Design and Performance Analysis for Grid-Interconnected Systems

2014 IEEE International Conference on Industrial Technology (ICIT)

Step-by-step design and control of LCL filter based three phase grid-connected inverter

IEEE Transactions on Power Electronics

Grid Interfacing of Multimegawatt Photovoltaic Inverters

Design of LCL filter for Grid-interfaced PV system based on Cost minimization

Journal	Data powered by TypesetIEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2016
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open Access	No