Power Transformer Protection Using a Multiregion Adaptive Differential Relay

Dashti, Hadi; Sanaye‐Pasand, M.

doi:10.1109/tpwrd.2013.2280023

Cited by 58 publications

(26 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An adaptive differential protection for the 3‐phase transformer is proposed in Oliveira et al in which the restriction zone is increased or decreased according to different operating conditions. An adaptive multiregional differential relay is given in Dashti and Sanaye‐Pasand, in which dual slope differential characteristics are divided into 5 operating regions to provide correct decisions for mild, heavy, severe internal faults, external faults with CT saturation, and inrush conditions. The fault component of the restraint and differential currents is used to adaptively adjust the settings of the dual‐slope characteristics according to the disturbances and discriminates external and internal faults …”

Section: Introductionmentioning

confidence: 99%

Adaptive differential protection for transformers in grid-connected wind farms

George

Ashok

2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary In response to energy requirements and environmental concerns, renewable energy technologies including wind power are considered to be the potential alternatives. Generally, wind farms are integrated into the grid through a transformer, and its rating depends upon the capacity of wind farms. The fault current of the system to which wind farm is connected changes according to the wind generators in service as well as with the wind speed. The study shows that the existing differential relay for transformer protection mal‐operates during fault interval according to the operating conditions of the wind farm. Under such conditions, the generalized characteristics for the differential relay of the transformer need modification. The protection scheme should be capable of functioning satisfactorily under various dynamic conditions of the wind, which can be achieved through adaptive relaying. In this work, an algorithm for transformer differential protection according to the variation in wind power injection is proposed. A case study of a typical wind farm shows that the proposed algorithm adaptively modifies the settings of the differential relay with varying wind farm currents, according to the wind generators in service, as well as with regard to different wind speed conditions. The modified algorithm is also validated using the experimental setup in the laboratory.

show abstract

Section: Introductionmentioning

confidence: 99%

Adaptive differential protection for transformers in grid-connected wind farms

George

Ashok

2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

“…Power transformers are the most critical and expensive equipment in the field of transmission and distribution of electric energy [1,2]. It is one of the most important pieces of equipment in electrical systems [3].…”

Section: Introductionmentioning

confidence: 99%

Study on the Vacuum-Degassing Technology of the Oil-Paper Insulated Transformer

Hong¹,

Lv²,

Qing³

et al. 2018

Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)

View full text Add to dashboard Cite

The 3D model of the oil-paper insulated transformer was constructed by SOLIDWORKS and simulated by Moldflow to optimize its vacuum-degassing technology. The number of the inside oil papers, the space of the adjacent two oil papers, the number and its distribution of the setting oil inlets are discussed in detail and the variation of the relevant formed air bubbles are analyzed. It reveals that the pouring process and the residual air bubbles are seriously influenced by the number and the space of the oil papers. In order to exhaust the inside air, the reserved oil inlets should be set symmetrically on the top of the transformer. Furthermore, the formation mechanism of the residual air bubbles is proposed.

show abstract

“…Power transformer insulation is one of the most important pieces of equipment in electrical systems, which is critical and expensive in the field of transmission and distribution of electric energy [1,2]. It has the insulation systems made in cellulose paper and mineral oil [3], which are used in the electric power transformer mainly to transfer heat [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Insulating Properties of the Oil-Paper Transformer at its Different Position by Partial Discharging System

Hong¹,

Peng²,

Lv³

et al. 2018

Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)

View full text Add to dashboard Cite

The oil-paper transformer is widely used as the common insulating device in the electrical industry. The transformer with the reserved primary coil and the secondary coils was filled with the transformer oil by the vacuum pouring process. Its insulating property was tested by the partial discharging (PD) system and the testing results are analyzed in detail. The experiment data reveals that the insulating properties of transformer at different positions are diverse due to the specific oil-paper structure. Obviously, the outer part of the transformer shows a much higher insulating property than its inner part. This confirms the residual air or defects are mostly concentrated in the inner part and air in the outer part is easier to be degassed by a viable vacuum pouring technology.

show abstract

Power Transformer Protection Using a Multiregion Adaptive Differential Relay

Cited by 58 publications

References 18 publications

Adaptive differential protection for transformers in grid-connected wind farms

Adaptive differential protection for transformers in grid-connected wind farms

Study on the Vacuum-Degassing Technology of the Oil-Paper Insulated Transformer

Investigation on Insulating Properties of the Oil-Paper Transformer at its Different Position by Partial Discharging System

Contact Info

Product

Resources

About