产生随机信号。此模块是用于评估当信号中有谐波时，对电能质量产生的影响-Generate random signal.This module is used to assess when a harmonic signal, the influence on power quality

电能质量闪变测试仪。此模块是用于评估当信号中有谐波时，电压闪变的程度-Power quality flicker tester.This module is used to uate when signal with harmonic, voltage flicker