Harmonic loss analysis of converter transformer in LCL-HVDC system

Ni, Qing; Luo, Longfu; Fan, Jin; Jin, Zhaowei

doi:10.1016/j.egyr.2020.11.231

Cited by 10 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Converter transformers for LCC applications normally are specified with considerably high impedances, to contribute to the HVDC short-circuit power strength, limiting the fault currents. Hence, the contribution of the magnetic flux to the total converter transformer load losses is extremely significant [17].…”

Section: B Winding Losses and Total Weightmentioning

confidence: 99%

“…Where b is equal to rr for axial losses, and to hc for radial losses. The conductor cross-section area in [m 2 ] is given by (17):…”

Section: B Winding Losses and Total Weightmentioning

confidence: 99%

“…Since eddy losses depend on the load current frequency, with the harmonics' spectrum (Tables V and VI), each ohmic and eddy losses component, can be obtained for the fundamental and for all harmonic orders for a specific load profile. The losses with harmonics 𝑷 𝒘 𝒉′ , (33), are obtained by adding each loss component, proposed by [36], [37]:…”

Section: Validation With Finite Elements Analysismentioning

confidence: 99%

See 2 more Smart Citations

Multi-Objective Design Optimization for HVDC-LCC Converter Transformers: Analytical and FEA-Based Comparison

et al. 2023

View full text Add to dashboard Cite

show abstract

Section: B Winding Losses and Total Weightmentioning

confidence: 99%

“…Where b is equal to rr for axial losses, and to hc for radial losses. The conductor cross-section area in [m 2 ] is given by (17):…”

Section: B Winding Losses and Total Weightmentioning

confidence: 99%

Section: Validation With Finite Elements Analysismentioning

confidence: 99%

See 1 more Smart Citation

Multi-Objective Design Optimization for HVDC-LCC Converter Transformers: Analytical and FEA-Based Comparison

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Under no-load closing conditions, the differential protection device of the converter misidentifies the generated magnetizing inrush as a fault, leading to a protection malfunction that cuts off the transformer access. It will cause the transformer's load to work abnormally, which may cause the HVDC transmission system to shut down in severe cases [1] . Accurate identification of excitation inrush is the key to improving system reliability.…”

Section: Introductionmentioning

confidence: 99%

Research on Intelligent Identification of Magnetizing Inrush Current based on Empirical Modal Decomposition

Duan

Zhang

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The accurate identification of the converter transformer magnetizing inrush current can ensure the safety of the operation of the UHV DC transmission system. In the differential protection of the converter transformer, it is extremely hard to distinguish between the excitation inrush current generated when the transformer is closed and the Fault current due to internal fault, which leads to frequent misoperation of the transformer protection to the extent that the transformer access fails. This paper proposes a current identification model based on empirical modal decomposition (EMD) and probabilistic neural network (PNN) algorithm with particle swarm (PSO) optimization. The EMD algorithm decomposes the current waveform, and the eigenmode functions (IMFs) of the three highest correlation bars are selected. The energy, cliffs, and standard deviation of the IMFs are extracted as the original waveform eigenvectors.

show abstract

“…Transformadores conversores normalmente são especificados com impedâncias consideravelmente altas, para contribuir com a limitação das correntes de falta do sistema HVDC. Dessa forma, a influência do fluxo de dispersão na composição das perdas em carga do transformador para HVDC é extremamente significativa (DAWOOD, 2023;NI, 2020).…”

Section: Perdas Nos Enrolamentos E Massa Totalunclassified

Metodologia para cálculo de perdas e projeto da parte ativa de transformadores de potência aplicados em sistemas de transmissão HVDC-LCC.

Czernorucki

View full text Add to dashboard Cite

À minha esposa Carla, e filhas Isabel e Ana Beatriz de Azevedo Czernorucki, pela motivação e apoio para conclusão deste trabalho. Aos Profs. Drs. Maurício Barbosa de Camargo Salles e Eduardo Coelho Marques da Costa, pela orientação e coorientação dispensadas no decorrer do trabalho. Aos Profs. Drs. Sérgio Luciano Avila e Bernardo Pinheiro de Alvarenga pelas sugestões e comentários apresentados no exame de qualificação, bem como trabalhos nos artigos publicados que fizeram parte desta tese.

show abstract

Harmonic loss analysis of converter transformer in LCL-HVDC system

Cited by 10 publications

References 2 publications

Multi-Objective Design Optimization for HVDC-LCC Converter Transformers: Analytical and FEA-Based Comparison

Multi-Objective Design Optimization for HVDC-LCC Converter Transformers: Analytical and FEA-Based Comparison

Research on Intelligent Identification of Magnetizing Inrush Current based on Empirical Modal Decomposition

Metodologia para cálculo de perdas e projeto da parte ativa de transformadores de potência aplicados em sistemas de transmissão HVDC-LCC.

Contact Info

Product

Resources

About