Carrier phase shifted SPWM based on current sourced multi-modular converter for active power filter

A novel current-source active power filter (APF) based on multi-modular converter with carrier phase-shifted SPWM (CPS-SPWM) technique is proposed. With this technique, the effect of equivalent high switching frequency con-verter is obtained with low switching frequency converter. It is very promising in current-source APF that adopt super-conducting magnetic energy storage component.

一种自适应配电网综合电压补偿装置

一种自适应配电网电压补偿装置,能比常规手段更有效地自适应补偿配电网末端电压偏低及三相电压不平衡现象,显著提高配电网供电质量。该装置采用三相自适应独立电压注入补偿技术;基于IGBT的AC-AC功率变换技术和针对SPWM的滤波器设计技术;基于快速故障检测和可靠旁路(<10ms)的高可靠性设计技术。自适应补偿电压注入,使末端电压升高,同时可以有效地解决三相电压不平衡问题。若植入储能环节,还可以实现重要负载的低电压穿越。