基于DSP的电能质量检测技术与无功补偿测控方法

Power quality detection technology and reactive power compensation measurement and control method based on DSP

针对目前电能质量检测技术检测精度低,无功补偿效果随着电网电压降低而降低的问题,基于DSP研究了一种新的电能质量检测技术与无功补偿测控方法。通过DSP处理器对电能质量进行检测,确定复序列,在DSP内部对复序列进行转换,通过电压传感器采样,使用空闲线多处理器模式实现串口通信。利用STATCOM实时追踪电流变化,STATCOM以并联的方式连接于电网之中,内部发送的无功电流会跟随电网负荷变化而快速变化,实现功率的自动补偿,确保电网在动态的模式下实现无功补偿。实验结果表明,基于DSP的电能质量检测技术与无功补偿测控方法的测量精度为0.0273%,满足电网要求,补偿过程不会受到电网电压影响,始终保持在恒定水平。

In view of the low detection accuracy of the current power quality detection technology and the reduction of the reactive power compensation effect as the grid voltage decreases,a new power quality detection technology and reactive power compensation measurement and control method based on DSP are studied.The power quality is detected by the DSP processor,the complex sequence is determined,the complex sequence is converted in the DSP,the voltage sensor is sampled,and the serial port communication is realized by using the idle line multiprocessor mode.Using STATCOM to track current changes in real time,STATCOM is connected to the power grid in parallel,and the reactive current sent internally will change rapidly with the load changes of the power grid to realize automatic power compensation and ensure that the power grid realizes reactive power compensation in a dynamic mode.The experimental results show that the measurement accuracy of the DSP-based power quality detection technology and reactive power compensation measurement and control method is 0.0273%,which meets the requirements of the power grid.The compensation process will not be affected by the power grid voltage and remains at a constant level.