The feasibility research on distribution network loop closing operation based on hybrid grounding model of arc suppression coil and low resistance

Hu, Yezhou; Shao, Xianjun; Xie, Chenggang; Chen, Zhenhai; Wu, Shunyu; Shi, Yuchao; Li, Zhuoran

doi:10.1109/cieec47146.2019.cieec-2019524

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…At the closing point, we construct the closing equivalent circuit, as shown in Figure 1. When the parameters of the closing line and the voltage on both sides of the closing point are known, the steadystate current of the closing loop is determined by KVL, as shown in Equation (1).…”

Section: Structure and Principle Of Hpst Ring Closing Devicementioning

confidence: 99%

“…Distribution networks are directly oriented towards users, and controlling and ensuring their safe operation is the key to ensuring the quality of power supply. The distribution network is designed with a closed-loop structure and operates with an open-loop power supply, which greatly improves the reliability of the power supply [1][2]. However, when equipment such as transformers and transmission lines are overhauled or fail, for important loads with demanding power supply quality, the open-loop power supply cannot avoid the impact of power outages caused by switching operations [3].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Structure and Principle Of Hpst Ring Closing Devicementioning

confidence: 99%

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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“…Moreover, a power flow control method to minimize power losses [2] has been studied. In addition, studies have investigated the permissible current of power lines during loop operation, risk assessment during N‐1 power control [3], and overcurrent countermeasures [4–7]. Additionally, an algorithm for temporary loop operation for early transmission in case of distribution line failure has been developed [8], in addition to a study on reliability evaluation from the viewpoints of system configuration, line span, and failure probability during loop operation [9].…”

Section: Introductionmentioning

confidence: 99%

Identifying Faulty Sections in Distribution Line Loop Operation using Section Switchgear with Sensor without Branch Lines

Kodama

Iino

Hayashi

2023

IEEJ Transactions Elec Engng

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The loop operation of distribution lines is expected to reduce power loss and increase the introduction of distributed energy resources as solar power generators and storage batteries. A significant problem during the failure of a section of a distribution line in loop operation is the extension of the failure to other sections due to the wideness of the power supply network area. Currently, there are no methods to easily identify a faulty section using the failure waveform during the loop operation of distribution lines and ground faults; consequently, short‐circuits or disconnections still occur. Therefore, when operating a loop of distribution lines, it is necessary to identify and isolate a faulty section. To solve this problem, we investigate and propose a method to identify the faulty section based on the voltage and current values measured using a switchgear with sensor at the waveform level. By applying the proposed method to identify and isolate faulty sections during distribution line loop operation, power can be transmitted to sections where no fault has occurred at an early stage. The proposed method has a significantly reliable fault detection capability and will help improve the stability of the power supply during loop operation. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Modeling and Simulation of a Load Transfer Controller for Uninterrupted Operation of Low-Voltage Distribution Grids

Xie

Guan

et al. 2021

2021 IEEE 4th International Electrical and Energy Conference (CIEEC)

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The feasibility research on distribution network loop closing operation based on hybrid grounding model of arc suppression coil and low resistance

Cited by 5 publications

References 3 publications

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

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

Identifying Faulty Sections in Distribution Line Loop Operation using Section Switchgear with Sensor without Branch Lines

Modeling and Simulation of a Load Transfer Controller for Uninterrupted Operation of Low-Voltage Distribution Grids

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