Minimization of Harmonics Penetration into Transmission and Distribution Systems by Utilizing Tertiary Winding of the Transformer

Elagab, Ammar Mishal Abd-Elrasool; El-Amin, Ibrahim

doi:10.1109/ieeegcc.2017.8448241

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…The tertiary transformer is usually used in the application of inrush current mitigation of Line Frequency Transformer (LFT) as in [9], [10]. The tertiary transformer can also be used in filtering harmonics either with passive or active filters [11]. A hybrid transformer is designed in [12] to combine PV and wind turbine systems for MV grid-connected operation.…”

Section: System Descriptionmentioning

confidence: 99%

Adaptive Notch Filter based WECS for Unbalance Mitigation

Abbas¹,

Mokhtar²,

Marei³

et al. 2024

RE&PQJ

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The accelerating spread of distributed energy resources among the LV networks has revealed their adverse impact on voltage profiles, power quality and protections along the network. On the contrary, since they are essentially interfaced with the network through power electronic converters that can be exploited to enhance power quality. Voltage regulation, unbalance and harmonics mitigation are some examples of the functions that can be implemented through these converters. This paper presents a wind energy conversion system (WECS) with a back-to-back converter performing its mere function of maximizing wind energy capture and regulating output active and reactive power. Added to these basic functions, ancillary services are provided to a local load and MV grid. Voltage regulation of the load voltage at different loading conditions is achieved. Extraction of load unbalance is investigated through different algorithms. Adaptive Notch Filter (ANF) has demonstrated a leading response over the conventional methods in detecting the symmetrical components under different unbalance conditions. Unbalance in grid currents is then effectively managed and the currents from/to the MV grid are ensured to be balanced. The system is simulated using PSCAD/EMTDC and results are presented to confirm validity of the proposed methods.

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Section: System Descriptionmentioning

confidence: 99%

Adaptive Notch Filter based WECS for Unbalance Mitigation

Abbas¹,

Mokhtar²,

Marei³

et al. 2024

RE&PQJ

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“…From (17) the impedance on the primary side on the third harmonic current is decreased by the square of the turn's ratio but by (24) energy stored in the inductor decreases by the square of the turns ratio. That means if the higher the turn's ratio, the lower the energy stored and hence lower the cost of an inductor, as cost and size of inductor depend on maximum energy stored in the inductor.…”

Section: 𝜋√𝐿𝐶mentioning

confidence: 99%

“…This paper proposes a new technology to remove third harmonic currents. The major contributions of the proposed paper are:  A passive filter that blocks zero-sequence harmonics [24] especially the third harmonic is presented. The construction, working principle, and design considerations are discussed.…”

Section: Introductionmentioning

confidence: 99%

Third harmonic current minimization using third harmonic blocking transformer

Bhat¹,

Pius²

2022

IJEECS

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Zero sequence blocking transformers (ZSBTs) are used to suppress third harmonic currents in 3-phase systems. Three-phase systems where single-phase loading is present, there is every chance that the load is not balanced. If there is zero-sequence current due to unequal load current, then the ZSBT will impose high impedance and the supply voltage at the load end will be varied which is not desired. This paper presents Third harmonic blocking transformer (THBT) which suppresses only higher harmonic zero sequences. The constructional features using all windings in single-core and construction using three single-phase transformers explained. The paper discusses the constructional features, full details of circuit usage, design considerations, and simulation results for different supply and load conditions. A comparison of THBT with ZSBT is made with simulation results by considering four different cases.

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