三绕组自耦变压器与普通变压器并列运行的研究与实施

Study and Implementation on Parallel Operation of Three-Winding Autotransformer and General Transformer

为变电所的扩容 ,需将 2台型号不同且技术参数相差较大的电力变压器 ,即OSFPS7 12 0 /2 2 0型三绕组自耦变压器与SFPSZ 12 0 /2 2 0型三绕组普通变压器实施可靠、经济地并列运行。经对 3种运行方式下负荷分配的理论分析和计算 ,提出了合理、可行的调整主变压器分接头和就地抑制无功分量的技术对策 ,符合继电保护及安全自动装置配置的要求。

In order to increase the aggregate capacity of substation,two different type power transformers with quite different technical parameters have to reliably and economically operate in parallel.One is OSEPS7?120/220 three winding autotransformer and the other is SEPSZ?120/220 general three winding transformer.By theoretic analysis and calculation of load distribution under three typical models,the reasonable,applicable technical strategy of main transformer tap changing and local reactive power restraint is proposed,which meets the configuration requirements of relay protection and automatic equipment.