摘要
通过对静止同步补偿器(STATCOM)换流过程的分析,说明基于晶闸管的电压型和电流型STATCOM的基本原理,建立并求解基于三相回路方程和功率平衡方程的数学模型。提出当工作角度满足要求时,电压型晶闸管STATCOM可吸收无功,电流型晶闸管STATCOM可发出无功。构建了12脉冲电压型晶闸管STATCOM样机装置,实验验证了电压型晶闸管STATCOM的可行性。实验结果表明,电压型晶闸管STATCOM在其工作范围内能吸收连续可调无功功率。装置工作电流谐波小,具备普通STATCOM装置的优点,可用于电力系统无功补偿领域。采用该装置可以降低STATCOM的成本,实现国产化。
Through the analysis of the commuting sequence of a STATCOM, it was proposed the theory of a thyristor-based STATCOM built on a voltage source converter and a current source converter respectively. In order to analyze the performance of the proposed STATCOM, mathematic models based on equations of the 3-phase circuit and power equilibrium were presented. It is brought forward that with the appropriate control, the thyristor-based VSC STATCOM will absorb reactive power, and the thyristor-based CSC STATCOM will generate reactive power. A 12-pulse prototype of the thyristor-based VSC STATCOM was built to verify the theory. EXperimental results show that the thyristor-based VSC STATCOM can absorb variable reactive power by adjusting its fire angles. The equipment has reduced current harmonic and holds the advantage of conventional STATCOM. Therefore it can be used for reactive compensation in power systems.
出处
《中国电力》
CSCD
北大核心
2007年第4期11-15,共5页
Electric Power
关键词
静止同步补偿器
电压型逆变器
电流型逆变器
建模
static synchronize compensator
voltage source converter（VSC）
current source converter（CSC ）
modeling
