Integrated HVDC Circuit Breakers With Current Flow Control Capability
Integrated HVDC Circuit Breakers With Current Flow Control Capability
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DOI：
10.1109/tpwrd.2017.2711963
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发表时间：
2018-02
影响因子：
4.4
通讯作者：
O. Cwikowski;J. Sau-Bassols;Bin Chang;E. Prieto‐Araujo;M. Barnes;O. Gomis‐Bellmunt;R. Shuttleworth
中科院分区：
文献类型：
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作者：
O. Cwikowski;J. Sau-Bassols;Bin Chang;E. Prieto‐Araujo;M. Barnes;O. Gomis‐Bellmunt;R. Shuttleworth
网状高压直流输电网的两个关键问题是线路潮流管理和直流故障保护。需要电流控制器（CFC）来平衡网状直流电网中的电缆电流，以防止个别线路功率容量限制限制电网中的整体功率流。直流断路器（DCCB）也将被要求保护HVDC电网免受直流故障的影响。本文表明，电流控制器的功能可以添加到一个混合CB的设计。本文提出了一种将跨线CFC集成到混合DCCB的负载换向开关（LCS）中的方法。分析了LCS/CFC一体化设计，建立了状态空间模型。通过MATLAB Simulink和PSCAD仿真验证了LCS/CFC在正常运行时的性能。给出了LCS/CFC一体化设计与分离设计的比较。案例研究表明，减少总功率损耗，并改善保护操作时间可以实现。
Two key problems in meshed high-voltage direct current (HVDC) transmission grids are managing line power flows and protection against dc faults. Current flow controllers (CFCs) will be required to balance cable currents in meshed dc grids, in order to prevent individual line power capacity limits restricting overall power flow in the grid. Direct current circuit breakers (DCCBs) will be also required to protect HVDC grids from dc faults. This paper demonstrates that the current flow controller functionality can be added into a hybrid CB's design. This paper proposes integrating an interline CFC into the load commutation switch (LCS) of a hybrid DCCB. The integrated design LCS/CFC is analyzed and a state-space model is derived. The control of the CFC is designed and the performance of the LCS/CFC during normal operation is verified by means of MATLAB Simulink and PSCAD simulations. A comparison of the integrated LCS/CFC and the separate design is given. The case studies show a reduction in total power losses, and improved protection operation times can be achieved.