新型DT-STATCOM原理分析与结构设计

提出一种新颖配电变压器一体化静止同步补偿装置(DT-STATCOM)的设计思想和方法:基于功率平衡原理,将STATCOM从变压器高压绕组抽头接入,充分利用配电变压器的富余容量来补偿系统所需的无功功率。阐述了DT-STATCOM系统无功补偿的理论基础,提出了多种DT-STATCOM系统结构。针对Dyn型变压器,重点研究了变压器高压绕组多抽头DT-STATCOM系统结构,分析了该结构对变压器绕组电流分布的影响,选择了合适的抽头电压等级。仿真结果表明,DT-STATCOM系统结构具有很好的无功功率补偿性能。

Principle Analysis and Structure Design of a Novel DT-STATCOM

The novel design idea and method of an integration system of distribution transformer and static synchronous compensator(DT-STATCOM) is proposed.Based on the power balance principle,STATCOM is accessed in the system from the taps at transformer high voltage windings to make full use of the spare capacity of the distribution transformer compensating the system reactive power.The theoretical basis for DT-STATCOM reactive power compensation is described,several system structures of DT-STATCOM are presented.For Dyn type transformers,the structure of DT-STATCOM with multi-tap at the transformer high voltage windings is emphatically studied,and its influence on the current distribution in the transformer windings is analyzed,at last an appropriate tap voltage is selected.Simulation results show that the proposed DT-STATCOM system structure has good performance of reactive power compensation.