第三绕组增加串变的中性点调压自耦变设计

Design of Neutral Point Voltage Regulating Autotransformer with Addition of Series Transformer in Tertiary Winding

针对有多级有载调压的自耦变压器,对比了恒磁通、变磁通等多种设计解决方案。提供了通过增加串变来稳定变磁通调压变压器第三绕组电压的设计思路。此种调压方式比常规直接使用调压开关的方案成本低,比中压增加串变来调压的方案损耗低,同时串变的容量小。

Multiple design solutions such as constant flux voltage variation and variable flux voltage variation were compared for autotransformers with multi-steps on-load volt-age regulation.A design concept is provided to stabilize the voltage of the third wind-ing of a variable flux voltage variation transformer by adding a series transformer.This voltage regulation method has lower cost compared to the conventional scheme of di-rectly using voltage regulating tap-changers,lower loss compared to the scheme of in-creasing series transformer for voltage regulation in medium voltage side,and smaller capacity of series transformer.