基于变压器端口调节的可控电抗器

提出一种具有控制绕组和短路绕组2种副边绕组的新型多绕组变压器式可控电抗器。调节控制绕组与原边电流的关系，原边绕组端口可以呈现连续变化的电抗值，再结合短路绕组的分级串联短路，则可使装置的电抗值或容量在较大范围内平滑调节。该电抗器的调节容量主要通过绕组短路获得，因此作为电流控制设备的脉宽调制(pulse width modulation，PWM)逆变器容量很小。对所得出可控电抗器进行建模及控制分析，试验结果证实了该可控电抗器的可行性及优异的工作性能。

Controllable Reactor Based on Transformer Winding Current Regulating

A novel transformer-type controllable reactor (CR) was presented which had two kinds of secondary windings: control winding (CW) and short-circuit windings (SW). The impedance of the primary-winding could be a reactance varying continuously in wide range by combining stepped series short-circuiting of the SWs and adjusting the current relationships between the CW and primary winding. The CR’s capacity regulating was achieved by winding short- circuiting mainly, so the power rating of PWM (pulse width modulation) inverter used to accomplishing current control was low. Model analysis and realizing methods for the proposed CR were provided, and the feasibility and excellent characteristics of it were verified by the experimental results.