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讨论了27.5 kV供电的AT供电系统性能并得出结论:第1个AT漏抗较小时,27.5 kV自耦变压器供电系统的电气性能与正常AT供电系统基本一样;第1个AT只向第2个AT提供功率,不直接向负荷提供功率则第1个AT的电流永远与第2个AT一样;只有1个AT区间的27.5 kV AT供电系统的优点是可能节省变压器总容量;与由55 kV供电的正常AT供电系统比,第1个AT承受的短路电流增大且须注意承受短路电流能力校核。
The performance of AT power supply system with 27.5 kV power supply is discussed and the conclusion is drawn that the electrical performance of 27.5 kV autotransformer power supply system is basically the same as normal AT power supply system when the first AT leakage reactance is small; One AT provides power and the first AT is always the same current as the second AT without providing power directly to the load; the advantage of a 27.5 kV AT powering system with only one AT interval is that it is possible to save the total transformer capacity; The normal AT power supply system than the supply, the first AT to withstand the short-circuit current increases and must pay attention to withstand short-circuit current capacity check.