In the modern power system, STATCOM can conduct rapid and flexible adjustment to the reactive power flow in power system, so as to improve the integrated stability of power system. This paper constructed a STATCOM simulation model in the Matlab based on the ladder wave modulation method and made simulation analysis. The ladder wave modulation method is to use the principle of ladder wave approximation sine wave and generate the corresponding ladder wave through controlling all thyristor hige, and will overlay the ladder wave of each H bridge to approximate sine wave.%在现代电力系统中STATCOM(静止同步补偿器)能对电力系统的无功潮流进行快速灵活的调整,从而达到提高电力系统综合稳定性的目的.文章在Matlab中搭建了基于阶梯波调制法的STATCOM的仿真模型并进行了仿真分析,阶梯波调制法是利用阶梯波逼近正弦波的原理,通过控制各个晶闸管的通断来产生相应的阶梯波,将各个H桥的阶梯波进行叠加来逼近正弦波的.
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