Development Of Power Quality Detector Based On DSP And ARM

With the rapid development of science and technology,the requirements for power quality are getting higher and higher.The constant technological revolution in the power electronics industry has brought great convenience to people's lives,and brought many power quality problems,which bring serious pollution to the power system environment.For this reason,more and more electric power science and technology workers are devoted to the work of power quality research.This paper introduces the various problems of power quality and its harm,at the same time introduces the research status of power quality detector at home and abroad.Then the definition of power quality parameters is analyzed,and the correlative calculation method of each parameter is put forward.Based on the theory of power quality detection technology and combined with the national standard for power quality testing,a DSP + ARM dual-microprocessor power quality detector is proposed,and its hardware system and software system are mainly designed.In terms of hardware,combining the advantages of DSP operation and ARM control,a hardware framework with DSP as the core and ARM as the control core is designed.To high-speed 16-bit AD acquisition chip AD7006 to achieve high-precision sampling.DSP and ARM communication between the use of 16-bit parallel bus interface for real-time communication.In software,we mainly introduce the use of FFT algorithm to achieve embedded C language on the harmonics and voltage sagging detection algorithm is written;and ARM Linux operating system transplantation;Finally,in Ubuntu + QT under the interface design.Finally,the high-power motor in their schools comprehensive experimental device for prototype testing,mainly on the three-phase voltage,current,frequency deviation,power and harmonics tested.The test results are tabulated and analyzed.Finally,it is proved that the prototype satisfies the testing requirements of each index.