Anti-Surge Driving Strategy Based on the Thyristor-Controlled Phase-Shifting Transformer

The Thyristor-Controlled Phase Shifting Transformer (TCPST) holds significant prospects in the increasingly complex power grid flow control due to its reliable load regulation and cost-effectiveness. However, the semi-controlled characteristics of thyristors introduce the possibility of current surg...

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Bibliographic Details
Published in2024 IEEE 7th International Electrical and Energy Conference (CIEEC) pp. 2477 - 2482
Main Authors Wang, Xinying, Wang, Chuyang, Zhang, Mengjie, Dong, Xuan, Shen, Jiapeng
Format Conference Proceeding
LanguageEnglish
Published IEEE 10.05.2024
Subjects
current direction
driving strategy
Electric potential
power reference threshold
Reliability
Short-circuit currents
Switches
TCPST
Threshold voltage
Thyristors
winding short-circuit
Windings
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Summary:The Thyristor-Controlled Phase Shifting Transformer (TCPST) holds significant prospects in the increasingly complex power grid flow control due to its reliable load regulation and cost-effectiveness. However, the semi-controlled characteristics of thyristors introduce the possibility of current surges of short-circuit during mode switching, restricting the widespread engineering application of TCPST. To address this issue, this paper proposes an anti-surge driving strategy for mode switching on the basis of the TCPST: a locking driving strategy that combines current direction of valve-group and operating mode to address the current surge issues induced by coil short-circuit during mode switching. Additionally, an RC buffer circuit is added within the valve-group, and a power reference threshold is introduced in the driving strategy to reduce the voltage surge associated valve-group momentary open-circuit. Finally, simulations are conducted on a 220kV grid environment with the TCPST, confirming the effectiveness of the proposed anti-surge driving strategy.
DOI:10.1109/CIEEC60922.2024.10583458