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

Xie, Cong; Guan, Zhitao; Li, Junlin; Mao, Chengxiong; Wang, Dan; Li, Jingqi; Wang, Xiaocong; Liu, Zhichao; Zhang, Yanyu; Qi, Yuanzhuo

doi:10.1109/cieec50170.2021.9510523

Cited by 3 publications

(3 citation statements)

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“…Few papers study the control strategy of SCLT scheme [11], [17]. The simple PI and PR controllers are adopted in their control strategies.…”

Section: ) Control Strategymentioning

confidence: 99%

“…The upper-level control strategy is mainly responsible for the coordination of the four processes and the series-parallel modes. The upper-level control strategy for the four process of power supply transferring operation in single mode has been described in [17], and the control strategy for the power supply restoring operation is similar. The detailed is not descripted here.…”

Section: Upper-level Control Strategymentioning

confidence: 99%

“…The voltage amplitude and phase angle differences for allowing loop closing operation are set to 15 V and 5 °, which are determined based on the engineer's knowledge and experiences. In [17], a scheme of seamless closed-loop load transfer (SCLT) was proposed based on power electronic technology, which has better performance in the impulse and steady-state circulating current. The SCLT devices can reduce the risk of loop closing operation and improve the power supply reliability [18].…”

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confidence: 99%

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Control Strategy and Implementation of Seamless Closed-Loop Load Transfer Mobile Prototype for 400 V Distribution Network

Guan,

Tang,

Mao

et al. 2024

IEEE Access

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Recently, ordinary residential users' tolerance for power outages has dropped much by the flourishing economy. To further improve the power supply reliability, a scheme of seamless closed-loop load transfer was proposed based on series compensation technology. For its field application, two points should be considered: 1) For the efficient utilization, the device is designed with high mobility. But its mobility is limited due to its power requirements and the usage of magnetic components. 2) The mobility leads to variable nodes interconnected each time, which puts forward high requirements for the control strategy. The following are proposed: 1) Proposing a novel control strategy based on online impedance estimation method to ensure the effectiveness of the mobile prototype in variable scenarios. 2) Employing modular design and seriesparallel mode to reduce the individual cabinet's volume, while utilizing the short-term overload capacity of magnetic components to augment the power density. A mobile prototype is developed, and test results prove the effectiveness of the control strategy and the engineering feasibility of the prototype.INDEX TERMS Interconnected power system, online impedance estimation, power distribution reliability, series-parallel mode.

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“…Few papers study the control strategy of SCLT scheme [11], [17]. The simple PI and PR controllers are adopted in their control strategies.…”

Section: ) Control Strategymentioning

confidence: 99%

Section: Upper-level Control Strategymentioning

confidence: 99%

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confidence: 99%

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