The invention provides a through flexible traction substation based on an existing traction transformer and a protection configuration method of the through flexible traction substation. Comprising an existing traction transformer, a matching transformer, a three-phase-single-phase converter and a plurality of circuit breakers. The through flexible traction substation can return to an existing power supply mode when the three-phase-single-phase converter has a serious fault. According to the invention, the influence of the unbalanced secondary side voltage of the existing traction transformer on the three-phase-single-phase converter is reduced, and meanwhile, the power supply reliability of the power supply interval of the through flexible traction substation is improved. According to the invention, negative sequence over-current protection is added in matching transformer protection, so that the safety of the transformer in an asymmetric fault is improved; and a reconfiguration switch is arranged at the output side of the power module of the three-phase-single-phase converter of the flexible traction substation, so that when the module has a non-short-circuit fault, the self-healing reconfiguration of the converter can be realized through the driving pulse blocking and reconfiguration switch, and the safe and reliable operation of the flexible traction substation is realized.
本发明提供了一种基于既有牵引变压器的贯通柔性牵引变电所及其保护配置方法。包括既有牵引变压器、匹配变压器、三相‑单相变流器以及若干个断路器,本发明的贯通柔性牵引变电所能在三相‑单相变流器出现严重故障后退回到既有供电方式。本发明减少既有牵引变压器副边电压不平衡问题对三相‑单相变流器的影响,同时提高贯通柔性牵引变电所供电区间的供电可靠性。本发明在匹配变压器保护中加入负序过电流保护,提高了变压器在非对称故障时的安全性;且在柔性牵引变电所三相‑单相变流器功率模块输出侧设置重构开关,在模块发生非短路故障时,可通过驱动脉冲封锁与重构开关实现变流器地自愈重构,实现柔性牵引变电所的安全可靠运行。
Through flexible traction substation based on existing traction transformer and protection configuration method thereof
基于既有牵引变压器的贯通柔性牵引变电所及其保护配置方法
2022-05-06
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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