Smart Impedance: A New Way to Look at Hybrid Filters

Gonzatti, Robson Bauwelz; Ferreira, S. C.; Silva, Carlos Henrique da; Pereira, Rondineli Rodrigues; Silva, Luiz Eduardo Borges da; Lambert‐Torres, Germano

doi:10.1109/tsg.2015.2466613

Cited by 59 publications

(31 citation statements)

References 28 publications

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“…Characteristics of all aforementioned topologies could be gathered in a novel topology called "smart impedance" [143][144][145]. Electrical spring is another device of this group that performs voltage regulation while improving the stability of grid and also takes part in demand response program [146][147][148][149].…”

Section: The Third Generation Of Pqi Devicessmentioning

confidence: 99%

An overview of power quality enhancement techniques applied to distributed generation in electrical distribution networks

Naderi

Hosseini

Zadeh

et al. 2018

Renewable and Sustainable Energy Reviews

126

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-It is obvious that power quality is an important characteristic of today's distribution power systems as loadsbecome more sensitive on the other hand nonlinear loads are increasing in the electrical distribution system. Considering the distributed nature of harmonic loads, the need for distributed power quality improvement (PQI) is inevitable. From years ago, researchers have been working on various kinds of filters and devices to enhance the overall power quality of power system, but today the nature of distribution system has been changed and power electronic based DGs play an important role in distribution grids. In this paper, a thorough survey is done on power quality enhancement devices with emphasis on ancillary services of multi-functional DGs. A literature review is also done on microgrids concept, testbeds and related control methods. Although there were some applications of DGs for PQI improvement these applications were not defined multi-functional DGs. Various control methods are studied and categorized regarding different viewpoints in the literature. Finally, a couple of thorough comparisons are done between the available techniques considering the nature, capabilities, advantages and implementation costs.

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Section: The Third Generation Of Pqi Devicessmentioning

confidence: 99%

An overview of power quality enhancement techniques applied to distributed generation in electrical distribution networks

Naderi

Hosseini

Zadeh

et al. 2018

Renewable and Sustainable Energy Reviews

126

View full text Add to dashboard Cite

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“…The active filter must control independently and generate V s,h and (Z Cp + Z Lp )I L,h to block the harmonic current flowing through the source. This is realized by synthesizing active impedance across the single-tune LC passive filter [25]. The voltage (Z Cp + Z Lp )I L,h forces the filter path into an ideal active short circuit for the selected load current harmonic.…”

Section: System Configurationmentioning

confidence: 99%

“…Inverter is the most expensive part of the active power filter. Based on this fact, a lot of works have been reported on a reduced inverter voltage three-phase HAPFs [22][23][24], and three-phase smart impedance [25] combining APFs in series with capacitors.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, proportional-resonant control has grown [28][29][30] in the area with its good tracking performance and less computational burden. The active impedance concept [25,31] was applied to actively tune the filter path for multiple characteristic harmonic frequencies toward active short circuit. Although the authors in [25] mention that smart impedance can be extended to a singlephase system, its arrangement demands a coupling transformer and a full DC link voltage (440 V).…”

Section: Introductionmentioning

confidence: 99%

“…The active impedance concept [25,31] was applied to actively tune the filter path for multiple characteristic harmonic frequencies toward active short circuit. Although the authors in [25] mention that smart impedance can be extended to a singlephase system, its arrangement demands a coupling transformer and a full DC link voltage (440 V). The active short circuit helped the system to effectively damp source voltage-originated harmonic, compensate load current harmonic, and supply variable reactive power.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Active impedance‐based single‐phase hybrid active power filter

Lemma

Liao

2019

IEEJ Transactions Elec Engng

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This article presents a single‐phase hybrid active power filter (1pSHAPF) containing a small rated active power filter connected in series with a single‐tuned inductive‐capacitive (LC) passive filter. Single‐phase nonlinear loads are increasing alarmingly in the distribution system. This is because the devices are gaining attraction for applications in information technology, emerging electric vehicle technology, and interfacing for power grids. However, nonlinear loads are common source of harmonics and contribute unpleasant conditions for the power systems. In the proposed control, a single‐phase hybrid active power filter was actively adjusted to form multiple active short circuits for characteristic harmonic. Load harmonic current easily diverted into filter path and harmonic voltages eliminated from the bus due to the active short circuit formed at the bus. The LC passive filter blocked 70% of the maximum fundamental bus voltage. This allows us to use lower DC‐link voltage hence reduces switching loss and investment for inverters. The detailed design procedures and their realization on TMS320F28335 DSP are analyzed and presented using PSIM and MATLAB/Simulink environments. The performances of the proposed controller are evaluated using diode rectifiers with resistance‐capacitance (RC) and resistance‐inductance (RL) loads. The results showed good harmonic voltage damping, current harmonic reduction (from 60.86 to 9.4%), and power factor correction. Therefore, the proposed controller can be taken as a solution to extend the hybrid active power filter (HAPF) tuned into multiple harmonic frequencies. This research has a practical benefit for power quality (PQ) compensation in the case of a single‐phase smart grid. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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