高温超导电缆自动重合闸方案研究

Study of auto-reclosure strategy for high temperature superconducting cable

高温超导电缆与传统电力电缆不同,外部短路故障产生的过电流可能导致高温超导电缆由于短时失超而被切除。鉴于高温超导电缆输送容量大,为了提高其供电可靠性和整个电网并列运行的稳定性,有必要增设自动重合闸装置。论证了采用高温超导电缆自动重合闸的重要性,阐述了高温超导电缆自动重合闸的设计原则,提出了一种基于超导电缆温升的自适应式重合闸配置方案,通过仿真计算,验证了所提方案的有效性。

Different from normal power cable, the High Temperature Superconducting （HTS） cable may be cut-off because of transient quench which is caused by external short-circuit current. HTS cable has a huge power transmission capacity, so the auto-reclosure device must be installed in the transmission line of HTS cable to improve the reliability and stability of power grid. The dissertation demonstrates the importance of auto-reclosure for HTS cable and analyses the temperature change of the HTS cable during reclosing, so that an appropriate strategy of auto-reclosure for HTS cable is presented, finally a simulation is carried out to investigate the validity of auto-reclosure scheme for HTS cable.