Harmonic characteristics and control strategies of grid-connected ...

In order to reveal the ability of harmonic mitigation control strategy with the addition of capacitor current active damping control to suppress high frequency …

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Series and parallel resonance active damping of three-phase …

Series and parallel resonance active damping of three-phase buck-type dynamic capacitor for reactive compensation and harmonic suppression ISSN 1755-4535 Received on 19th January 2020 Revised 24th March 2020 Accepted on 7th April 2020 E-First on 6th May 2020 doi: 10.1049/iet-pel.2020.0089

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Series and parallel resonance active damping of three‐phase …

Series and parallel resonance tend to occur and cause harmonic distortion when the distribution system contains a shunt power capacitor to compensate inductive load and dynamic capacitor (D-CAP) to suppress harmonics. This study focuses on the series and parallel resonance active damping of three-phase buck-type D-CAP, …

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Harmonic compensation and resonance damping for SAPF with …

Harmonic equivalent circuit of the system with multifunctional SAPF is shown in Fig. 2a, where SAPF operates to provide harmonic compensation and resonance damping simultaneously pensation current i F of SAPF is regulated to track current reference, which is composed of harmonic compensation current …

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Interaction of Harmonics with Capacitors | Request PDF

Investigates interaction of harmonics with capacitors. First the main applications of capacitors in power systems are outlined: power factor correction, definitions of displacement power factor ...

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Harmonic compensation and resonance damping for SAPF with …

System configuration with SAPF to suppress harmonic current (a) Dual-loop control system of SAPF with DC-side voltage outer-loop and compensation current inner-loop, (b) Implementation of RDFT algorithm without phase-angle compensation for extracting the kth harmonic component, (c) Implementation of RDFT algorithm with …

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Parallel Resonance Detection and Selective Compensation …

Due to capacitor elements and inductive line impedance in power system, parallel resonance could be triggered in the presence of harmonic currents from nonlinear load, whose frequency may shift ...

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Series and parallel resonance active damping of three-phase …

shunt power capacitor to compensate inductive load and dynamic capacitor (D-CAP) to suppress harmonics. This study focuses on the series and parallel resonance active damping of three-phase buck-type D-CAP, so as to achieve better power quality

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An Approach to Improve Harmonic Attenuation and

In a multi-parallel inverter system, the grid-tied inverters incorporate the PCC voltage feedforward technique to suppress the effect of low-order grid voltage harmonics on the inverter output ...

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A Novel Control Strategy for Improving the Performance of

In order to suppress harmonics and compensate for reactive power, researchers have put forward many feasible schemes [3,4,5]. Among them, the more popular schemes include passive filter (PF), parallel capacitor compensation, static reactive power compensation device, complete set of power capacitor compensation …

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IET Digital Library: Series and parallel resonance active damping …

Series and parallel resonance tend to occur and cause harmonic distortion when the distribution system contains a shunt power capacitor to compensate inductive load and dynamic capacitor (D-CAP) to suppress harmonics. This study focuses on the series and parallel resonance active damping of three-phase buck-type D-CAP, so as to …

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Dynamic Capacitor (D-CAP): An Integrated Approach to

Dynamic capacitor (DCAP) was firstly introduced in 2010 as an integrated compensator for reactive and harmonic compensation by even harmonic modulation (EHM) method [15, 16]. DCAP is one of the ...

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Parallel APF Compensating Voltage Source

Energies 2019, 12, 3070 2 of 16 of an uncontrolled rectifier non-linear load. The studies in [6,7] describe the characteristics and phenomena of parallel APF compensation motor and capacitor ...

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Stability and Power Quality Enhancement Strategy for DFIG System ...

Distributed grid and microgrid are becoming increasingly important in power system nowadays. In these grids, reactive compensations and harmonic current suppression are commonly employed to improve power quality. For the doubly fed induction generator (DFIG), high frequency resonance (HFR) will occur when it is connected to …

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A comprehensive review of improving power quality using active …

When the reactive compensation capacitor is parallel with the nonlinear load, from the load side, there is a risk of parallel resonance between capacitor and inductance in the power system line. ... would have multi-functions so that they can simultaneously suppress harmonics, correct the power factor, and compensate the …

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Interaction and coordination between reactive …

Dynamic capacitor (D-CAP) could be designed to compensate reactive power and suppress harmonic currents simultaneously by means of regulating DC and harmonic terms in duty …

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COMPENSATION OF HARMONICS TO IMPROVE POWER …

This paper presents design, simulation and development of hybrid active power filter for mitigation of the power quality problem at ac mains in ac-dc power supply feeding to a nonlinear load.

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A Fractional-Order Capacitor Based Method to Suppress Harmonic …

To address these issues, this paper proposes a FOC-based method to compensate for parameter error in harmonic suppression, especially for negative-order …

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Suppression of parallel resonance and mitigation of harmonic …

Obtained results have shown a remarkable performance on the elimination of harmonic distortion (null THD index achieved by the shunt APF) and the …

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Capacitor Voltage Damping Based on Parallel Feedforward Compensation ...

Abstract: Active damping is a popular approach to suppress the resonance in LCL-filtered grid-connected inverter owing to lossless damping and efficient system design capacitor voltage (CV) damping methods, a differential compensator is essentially needed in feedback path, where the damping effectiveness depends on …

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Research on Harmonic Current Amplification Effect of Parallel …

A parallel active power filter (APF) is generally used to suppress dynamic harmonic current and compensate reactive power in the grid. However, parallel APF may have a negative effect on the load ...

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Power Factor Correction and Harmonic Resonance: A Volatile …

a capacitor has a parallel resonant point. Parallel resonance causes problems only if a source of harmonics exists at the frequency where the impedances match. This is typically called harmonic reso-nance. Harmonic resonance results in very high harmonic currents and voltages Blown capacitor cans are just one possible outcome of harmonic resonance.

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Reshaping Strategy of Wide Frequency Impedance for DFIG …

The influence of grid equivalent impedance on system stability cannot be ignored [7,8]. On the other hand, new energy power generation systems often use parallel compensation capacitors to improve ...

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Harmonic Filter Circuit: How to remove Harmonics using Active …

The passive harmonic filter converts the harmonic current into the heat and protects the end device or load. The filter can be tuned to a certain frequency that needs to be eliminated as harmonics. There are mainly four types of passive harmonic filters are used: 1. High pass filter. 2. Bandpass filter. 3. C type filter and. 4. Series filter ...

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Design and application of a single‐tuned passive harmonic filter …

Measured at 27.5‐kV feeder. (a) Total harmonic voltage distortion. (b) Total harmonic current rms value. (c) Reactive power demand. (d) Voltage spectrum indicating resonance at 21st harmonic.

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Hybrid-paralleled power-factor-correction system for high-power ...

This paper proposes a novel power-factor-correction system for the harmonic suppression of high-power equipment. It connects a PWM (pulse width modulation) rectifier and several uncontrolled diode rectifier units in parallel. The PWM rectifier is not connected to the load, and the power of the IGBT device is lower than that …

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A Fractional-Order Capacitor Based Method to Suppress …

To address the issue, this paper proposes a method based on a fractional-order capacitor (FOC) whose order can be modulated according to the compensated capacitance and …

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A Novel Control Strategy for Improving the Performance of

In order to suppress harmonics and compensate for reactive power, researchers have put forward many feasible schemes [3,4,5]. Among them, the more …

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Parallel and series harmonic resonance prevention by anti …

This paper discusses a simple control scheme for an anti-resonance hybrid power factor correction capacitor bank in low-voltage industrial power systems. Conventional power factor correction capacitors are prone to failure due to high voltage and current caused by parallel and series resonance with the system inductance. Load …

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A PRACTICAL APPROACH TO HARMONIC COMPENSATION …

filter have been broadly used to suppress harmonics because of a, low initial cost and high efficiency. However, they have the following disadvantages; Source impedance strongly affects filtering characteristics. Parallel resonance between a source and a passive filter causes amplification of harmonic currents on the source side

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