scholarly journals Damping techniques for grid-connected converters with LCL filter: an overview

2021 ◽  
Vol 42 (2) ◽  
pp. 227
Author(s):  
Arthur de Abreu Romão ◽  
Newton Da Silva
Keyword(s):  
Renewable Energy Sources ◽  
Design Procedure ◽  
Voltage Source ◽  
Third Order ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Resonant Behavior ◽  
Low Pass ◽  
Grid Connected Converters ◽  
Low Pass Filters

Distributed generation systems, based on renewable energy sources, are typically connected to the main grid by a voltage-source inverter with a low-pass filter. The need for improved efficiency led to the use of third order low-pass filters, such as the LCL configuration, which has resonant behavior. In order to meet energy quality requirements and ensure the systems stability it is necessary to suppress the LCL filters resonance through damping techniques. Therefore, this paper presents an overview of some damping strategies found in literature and its design procedure, applied to a simulated single-phase grid-tied inverter. The comparison of each presented damping methodology characteristics is described, with analysis of advantages and drawbacks for each case.

scholarly journals A New Parameter-Extraction Method for DGS and its Application to the Low-Pass Filter

2004 ◽  
Vol 27 (2) ◽  
pp. 119-123 ◽  
Author(s):  
Haiwen Liu ◽  
Xiaowei Sun ◽  
Zhengfan Li
Keyword(s):  
Equivalent Circuit ◽  
Extraction Method ◽  
Circuit Simulation ◽  
Equivalent Circuit Model ◽  
Design Procedure ◽  
Parameter Extraction ◽  
Defected Ground Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

A new and simple parameter-extraction method for the equivalent circuit of defected ground structure (DGS) is presented. Using this method, circuit simulation, based on the DGS equivalent-circuit model, show excellent agreements with the electromagnetic (EM) simulation. Further, our method is applied effectively to design a low-pass filter (LPF) with DGS. Comparison between simulation and measurement confirm the validity of the LPF configuration and design procedure. Simple structure and high power handling capability are obtained from the proposed LPF.

scholarly journals Designing Microstrip Low Pass Filter In ISM Band For Rectenna System

2012 ◽  
Vol 1 (4) ◽  
pp. 356
Author(s):  
Pavan Sharma ◽  
Veerendra Jadaun ◽  
Devesh Mahor ◽  
Atal Verma
Keyword(s):  
Power Transmission ◽  
Wireless Power ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Communication Techniques ◽  
Filter Structure ◽  
Rf Communication ◽  
Power Transmission Systems ◽  
Low Pass ◽  
Low Pass Filters

The filter is required in all RF-communication techniques. Low Pass Filters play an important role in wireless power transmission systems. Transmitted and received signals have to be filtered at a certain frequency with a specific bandwidth. In this paper the design of filter is done in the ISM (Industrial, Scientific and Medical) band whose frequency lies between 1.55GHz- 3.99GHz. After getting the specifications required, we realized the filter structure with the help of CST-MW software.

Characterization of Low-pass Filters on Local Fields of Positive Characteristic

2016 ◽  
Vol 59 (3) ◽  
pp. 528-541 ◽  
Author(s):  
Qaiser Jahan
Keyword(s):  
Positive Characteristic ◽  
Sufficient Conditions ◽  
Local Fields ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Necessary And Sufficient ◽  
Low Pass Filters ◽  
The Scaling Function

AbstractIn this article, we give necessary and sufficient conditions on a function to be a low-pass filter on a local field K of positive characteristic associated with the scaling function for multiresolution analysis of L2(K). We use probability and martingale methods to provide such a characterization.

METHOD FOR MEASURING THE EQUIVALENT PARAMETERS OF INDUCTORS AS PART OF LOW-PASS FILTERS

2020 ◽  
pp. 19-29
Author(s):  
A. G. Zinovev ◽  
I. A. Shestakov
Keyword(s):  
The Self ◽  
Network Analyzer ◽  
Q Factor ◽  
Practical Application ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Loss Resistance ◽  
Low Pass ◽  
Low Pass Filters ◽  
Fifth Order

A method for measuring the self-capacitance, inductance, loss resistance, and Q-factor of inductors as part of an LC low-pass filter at its operating frequency is presented. An example of the practical application of this method for measuring the equivalent pa-rameters of inductors and capacitors as part of a fifth-order Cauer low-pass filter using network analyzer.

Disturbance-observer based control of voltage-source-converter under unbalanced voltage conditions

2017 ◽  
Vol 14 (6) ◽  
pp. 522-531 ◽  
Author(s):  
Akhtar Rasool ◽  
Esref Emre Ozsoy ◽  
Fiaz Ahmad ◽  
Asif Sabanoviç ◽  
Sanjeevikumar Padmanaban
Keyword(s):  
Disturbance Observer ◽  
Operating Conditions ◽  
Voltage Source ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Content Type ◽  
Negative Sequence ◽  
First Order ◽  
Unbalanced Voltage ◽  
Low Pass

Purpose This paper aims to propose a novel grid current control strategy for grid-connected voltage source converters (VSCs) under unbalanced grid voltage conditions. Design/methodology/approach A grid voltage dynamic model is represented in symmetrical positive and negative sequence reference frames. A proportional controller structure with a first-order low-pass filter disturbance observer (DOB) is designed for power control in unbalanced voltage conditions. This controller is capable of meeting the positive sequence power requirements, and it also eliminates negative sequence power components which cause double-frequency oscillations on power. The symmetrical components are calculated by using the second-order generalized integrator-based observer, which accurately estimates the symmetrical components. Findings Proportional current controllers are sufficient in this study in a wide range of operating conditions, as DOB accurately estimates and feed-forwards nonlinear terms which may be deteriorated by physical and operating conditions. This is the first reported scheme which estimates the VSC disturbances in terms of symmetrical component decomposition and the DOB concept. Originality/value The proposed method does not require any grid parameter to be known, as it estimates nonlinear terms with a first-order low-pass filter DOB. The proposed control system is implemented on a dSPACE ds1103 digital controller by using a three-phase, three-wire VSC.

Chatter alleviation for a class of second-order under-actuated mechanical systems with matched and mismatched disturbances

2016 ◽  
Vol 23 (3) ◽  
pp. 458-468
Author(s):  
Jinjin Shi ◽  
Jinxiang Wang ◽  
Fangfa Fu
Keyword(s):  
Sliding Mode ◽  
Mechanical Systems ◽  
Design Procedure ◽  
Second Order ◽  
Control Input ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Sliding Surfaces ◽  
Low Pass ◽  
Mismatched Disturbances

The chattering phenomenon and a system with both matched and mismatched disturbances are the major difficulties in sliding mode control design. This paper presents an effective design procedure to alleviate these two difficulties for a class of second-order under-actuated mechanical systems. In the proposed design, new hierarchical sliding surfaces are designed and a modified disturbance observer is utilized to estimate the lumped disturbance which is a linear combination of the matched and mismatched disturbances. The chatter in control input is filtered out by an integrator, which acts as a low-pass filter. The asymptotic stabilities of the entire sliding surfaces are guaranteed. A design study considering lateral control of a vehicle with matched and mismatched disturbances demonstrates the effectiveness of the proposed design.

scholarly journals Modelling of Butter worth low pass Stepped Impedance Microstrip line Filter

2020 ◽  
Vol 8 (5) ◽  
pp. 1225-1229
Keyword(s):  
Communication Systems ◽  
Return Loss ◽  
Satellite Communication ◽  
Microwave Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Microwave Application ◽  
Low Pass ◽  
Radar Satellite ◽  
Low Pass Filters

This paper presents the design of a class of highly selective micro strip low pass filters. The proposed structure is considered for Stepped Impedance Low Pass Butterworth filter of order n=3 and n=5 with cut-off frequency 1.2 GHz and passband ripple of 3.01db [1]. The substrate FR4 having a dielectric constant 4.4 is considered for calculating the physical length of the micro strip low pass filter. The designing equation are solved using MATLAB Software and the results are analysed and compared using IE3D Simulator. The microwave filter is a building block that provides frequency selectivity in various microwave application like mobile, radar, satellite communication systems. The simulated results show the insertion loss and return loss of about -6.65 dB & - 55.49dB for N=3 and -7.23dB &-16.01 dB for N=5.Simulation has also been done for VSWR.

Sign in / Sign up

Export Citation Format

Share Document