张佳民,廖盼盼,洪 轩,翟成强.基于直接信号合成技术电能质量干扰发生器的设计[J].电测与仪表,2016,53(20):. Zhang Jiamin,Liao Panpan,Hong Xuan,Zhai Chengqiang.The design of power quality disturbance generator based on the direct signal synthesis technology[J].Electrical Measurement & Instrumentation,2016,53(20):.
基于直接信号合成技术电能质量干扰发生器的设计
The design of power quality disturbance generator based on the direct signal synthesis technology
In this article we design a new type of analog power quality disturbance generator based on the direct signal synthesis technology, to solve the existing high performance power quality disturbance simulator, such as expensive that don’t suitable for general laboratory use. The sine wave signal is produced by the direct frequency synthesis chip AD9850, and the signal into the power quality waveform shaping after the elliptical passive low-pass filter. The functions of temporary over-voltage, short dips-voltage, voltage short interruption and voltage sag are realized by using single-chip microcomputer control D/A conversion chip DAC7811 and electronic switch CD4053B. The first amplified by using amplifier LM617 and the second amplified by using the power amplifier PA89A which is featuring with high output voltage and high speed, the technology of parallel triode is adopted to increase the output current of the system. Through the prototype test, the design can simulate a variety of power quality signal waveforms, relative to the economy and can achieve high power.
