摘要
以PIC18F4520单片机为控制核心,采用电压、电流互感器和有效值检测电路检测电网参数,运用C语言编程,开发了一种适用于低压配电网的晶闸管投切电容器(TSC)型动态无功补偿器,实现无功功率和功率因数相结合的控制策略,避免轻载时投切振荡。通过控制晶闸管导通时刻投切电容器,实现功率因数的提高和电能质量的改善,具有动态响应快、无投切冲击等优点。试验结果证明,该TSC型动态无功补偿器硬件电路设计合理,整个装置运行稳定、可靠。
A thyristor switched capacitor （TSC） type dynamic reactive compensator on PIC applied in low w^hage distribution networks was developed. This device, centered on PIC18F4520 micro controller unit, could detect networks parameters by adopting voltage or current transformers and effective value detection circuit. C program language was applied in the controlling method that combined reactive power with power factor, avoiding oscillation on the condition of light loading accordingly. This device could compensate the power factor and improve power quality by controlling the thyristor casting instant, which had a lot of advantages, such as rapid dynamic response and non-impact,etc. The results prove that the hardware design of TSC type dynamic reactive compensator is valid and the whole system runs stably and reliably.
出处
《低压电器》
2012年第12期40-44,共5页
Low Voltage Apparatus
关键词
晶闸管投切电容器
动态无功补偿
真有效值检测
电压过零检测
PIC18F4520
thyristor switched capacitor （TSC）
dynamic reactive power compensation
true effective value detection
voltage zero cross detection
PIC18F4520
