基于DSP控制的动态无功补偿装置优化设计

Optimum design of DSP controlled dynamic reactive power compensation device

研制了一台基于DSP控制的晶闸管投切电容(TSC)型无功补偿装置。该装置利用DSP的捕获功能实时跟踪电网频率变化,同步采样交流电网电压电流信号,并使用均方根算法,实现采样数据的实时快速处理,获得三相功率相关参数;投切补偿电容采用混合编码方式,融合了等值编码和不等值编码的优点,在保证补偿-装置投切精度的同时,实现了电容的循环投切。实际运行表明,该装置可以快速准确检测并计算电网各项参数,实时控制电容补偿,达到了实际应用的水平。

This paper develops a dynamic reactive power compensation device （TSC） controlled by DSP. This device uses DSP capture function to obtain the frequency variation of the electric network and sample the alternating signals （voltage and current） synchronously, and the RMS arithmetic is used to calculate the real-time data quickly. The compensative capacitors are encoded in the mixed mode, which has a better precision and can switch on/off the capacitors circularly. The operation of the device shows that it can measure the parameters of power system fast and oreciselv, and achieve real-time reactive nower compensation.