Fault Ride-Through Optimization Scheme for Hybrid AC/DC Transmission Systems on the Same Tower
Xu Chu, Qi Liu, Letian Fu, Shaoshuai Yu, Weidong Wang
TL;DR
This paper proposes new fault ride-through strategies to improve the reliability of hybrid AC/DC power systems during faults.
Contribution
The paper introduces two novel fault ride-through schemes that address power interruptions and reactive power issues in hybrid AC/DC systems.
Findings
A power compensation-based FRT scheme reduces reactive power redundancy during faults.
A protection-control cooperation FRT scheme improves AC line protection by detecting AC components on the DC side.
Simulation results confirm the effectiveness of the proposed methods in hybrid AC/DC systems.
Abstract
Sensors in power systems utilize the detection results of fault signals to guide subsequent fault handling procedures. However, the traditional phase-shift restart strategy exhibits limitations such as power interruptions, reactive power redundancy, and intersystem fault clearance failures when addressing faults in the hybrid AC/DC transmission system. To address these shortcomings, a power compensation-based fault ride-through (FRT) scheme and a protection-control cooperation FRT scheme are proposed, taking into account the operational characteristics of the symmetric monopole LCC-HVDC (SM-LCC-HVDC). The power compensation-based FRT scheme actively compensates for power, mitigating the impact of reactive power redundancy on the AC-side bus during faults. The protection-control cooperation FRT scheme is activated after sufficient AC components are detected on the DC side. It leverages…
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Taxonomy
TopicsHVDC Systems and Fault Protection · High-Voltage Power Transmission Systems · Power Systems Fault Detection