采用GTO的±300kvar新型静止无功发生器

Advanced static vargenerator of±300 kvar employing GTO thyristors

介绍了国内第一台基于１８脉冲大功率门极可关断晶闸管（ＧＴＯ）电压源变流器的先进无功发生器（ＡＳＶＧ）。该额定容量为±３００ｋｖａｒ的ＡＳＶＧ自１９９５年７月以来先后在清华大学与河南孟砦变电所投入试验运行。作者给出了该装置的硬件结构、参数选择和谐波抑制方法。试验结果表明该装置可以吸收和发出额定无功功率，可以以小于３０ｍｓ的响应速度对无功功率进行调节，并可在系统电压不对称度高达１０％条件下正常运行。

A  prototype advanced static var generator (ASVG) based on 18 pulse GTO voltage source converter is developed as the first phase of a 20 Mvar ASVG developing project. The ASVG, which is rated±300 kvar, has been put into experimental operation in Tsinghua University and Mengzhai substation of Henan Province, China, since July 1995. The design considerations such as the parameters selection and harmonic suppression are presented. The hardware configuration of the ASVG is also described. Experimental results show it can operate in two quadrants (leading vars and lagging vars) at the full 300 kvar rating, and is capable of rapid control of reactive power with a transient response less than 30 ms to change in commanded value. Furthermore it works properly under 10% voltage unbalance conditions in Mengzhai substation. 