An Efficient Sparse Matrix Technique for Closed Loop Current Analysis in Distribution Network

Qiu, Zejian; Wu, Longteng; Zeng, Tao; Wang, Yüan; Zhang, Xin; Cheng, Tao

doi:10.1109/repe55559.2022.9948978

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Configuration of Offshore wind farm power system Assuming bus I and bus II are connected through the main bus switch and main transformer 2 is maintained which is ready to reclose. Based on the existing literature on the close loop operation, the characteristic of the maintained transformer reclosing can be described as equation (1) [2],…”

Section: Analysis Of Transformer Reclosing Loop In Offshore Wind Powe...mentioning

confidence: 99%

“…Operating conditions in systems powered by renewable energy which utilize lots of power electronic converter equipment are more complex than those in conventional power systems. The closing damping current generated in the circuit during the close loop operation may cause risks such as circuit breaker trip, equipment overload, and overcurrent protection maloperation [2]. This indicates the higher requirements for grid close loop operation.…”

Section: Introductionmentioning

confidence: 99%

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A Coordinated Reclosing Strategy for Maintained Transformer in Offshore Wind Power Systems

Chen,

Wei,

et al. 2023

J. Phys.: Conf. Ser.

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Offshore wind power generation system needs to consider the maintained transformers to reclose. The close loop operation can meet the requirement for reclosing the maintained transformer and maximize the use of wind resources without disconnecting wind turbines. However, close loop operation will cause system damping which can easily cause system instability and protection maloperations. To suppress close loop current damping, a flexible reclosing strategy is proposed that coordinates control of the main bus switch and transformer-connected flexible switch which consists of a damping buffer branch and pass branch. The coordinated control of switches realizes the optimized reclosing state of the maintained transformer. Finally, case studies are established in PLECS simulation software to evaluate the effectiveness of the proposed flexible reclosing strategy to eliminate the reclose damping oscillation for maintained transformers in offshore wind power generation systems.

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Section: Analysis Of Transformer Reclosing Loop In Offshore Wind Powe...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Coordinated Reclosing Strategy for Maintained Transformer in Offshore Wind Power Systems

Chen,

Wei,

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…If the closed loop is forced, there may be a large voltage difference and phase difference at the connection closing point of the distribution network. When the closed-loop structure operates directly, there may be a large impact current, causing greater risks such as equipment overload, protection device tripping, and more serious power outage accidents [4].…”

Section: Introductionmentioning

confidence: 99%

Flexible closed-loop control device and control method for distribution network based on hybrid phase shifting transformer

Gan,

Yuan,

2024

J. Phys.: Conf. Ser.

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With the increasingly complex structure of the distribution network and the increasing demand for power supply quality from the user side, relying solely on the original grid layout for power supply can no longer meet existing needs. Closed loop power supply can achieve uninterrupted load to improve power supply reliability. This article proposes a flexible loop closing device based on HPST for the case of large voltage phasor differences on both sides of the busbar loop closing point in the distribution network and proposes corresponding flexible loop closing and load transfer strategies based on the characteristics of HPST. Finally, a simulation of loop closure and power control was conducted based on the 10 kV distribution network loop closure scenario, verifying the feasibility of the HPST flexible loop closure device and the effectiveness of the control strategy.

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A Coordinated Voltage Control Method for Suppressing Currents Induced by Closing-Loop Operation in Offshore Wind Power Systems

Liu,

Wang,

et al. 2023

2023 6th Asia Conference on Energy and Electrical Engineering (ACEEE)

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An Efficient Sparse Matrix Technique for Closed Loop Current Analysis in Distribution Network

Cited by 3 publications

References 6 publications

A Coordinated Reclosing Strategy for Maintained Transformer in Offshore Wind Power Systems

A Coordinated Reclosing Strategy for Maintained Transformer in Offshore Wind Power Systems

Flexible closed-loop control device and control method for distribution network based on hybrid phase shifting transformer

A Coordinated Voltage Control Method for Suppressing Currents Induced by Closing-Loop Operation in Offshore Wind Power Systems

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