Optimal Placement of GIC Blocking Devices Considering Transformer Thermal Limit Using Surrogate Optimization

Lamichhane, Anusha; Rezaei-Zare, Afshin; Asgary, Ali

doi:10.1109/eeeic/icpseurope54979.2022.9854797

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…The placement of these neutral blocking devices is not trivial and can lead to even more disturbances [27]. However, there are optimization algorithms that propose an optimal placement [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Reduction of geomagnetically induced current impacts by optimized neutral point connections

Schachinger

Albert

Renner

2023

IET Generation Trans & Dist

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Solar storms impact electrical power grids by causing quasi‐DC neutral point currents in transformers. These currents lead to half‐cycle saturation as well as other related and unwanted effects in the grid. To reduce the effect of these currents on the grid, DC‐blocking devices can be installed or changes in the grid topology can be made. However, these counter measures often have unwanted side effects or cannot be applied to the grid due to operational restrictions. In this work, a novel mitigation approach, based on the distribution of currents on more transformers, is presented. The number and location of grounded transformer neutral points is optimized, taking grid related constraints such as the minimal number of transformer connections into account. It is shown that the algorithm can effectively reduce the stress on transformers without any additional assets and thus increase system security.

show abstract

Section: Introductionmentioning

confidence: 99%

Reduction of geomagnetically induced current impacts by optimized neutral point connections

Schachinger

Albert

Renner

2023

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

Reduction of Geomagnetically Induced Current Impacts by Optimized Neutral Point Connections

Schachinger

Albert

Renner

2023

Preprint

View full text Add to dashboard Cite

Solar storms impact electrical power grids by causing DC neutral point currents in transformers. These currents lead to half-cycle saturation as well as other related and unwanted effects in the grid. To reduce the effect of these currents on the grid, DC-blocking devices can be installed or changes in the grid topology can be made. However, these counter measures often have unwanted side effects or cannot be applied to the grid due to operational restrictions. In this work, a novel mitigation approach, based on the distribution of currents on more transformers, is presented. The number and location of grounded transformer neutral points is optimized, taking grid related constraints such as the minimal number of transformer connections into account. It is shown that the algorithm can effectively reduce the stress on transformers without any additional assets and thus increase system security.

show abstract

Optimal Placement of GIC Blocking Devices Considering Transformer Thermal Limit Using Surrogate Optimization

Cited by 2 publications

References 12 publications

Reduction of geomagnetically induced current impacts by optimized neutral point connections

Reduction of geomagnetically induced current impacts by optimized neutral point connections

Reduction of Geomagnetically Induced Current Impacts by Optimized Neutral Point Connections

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