Design Of Power Quality Analyzer Calibration System Based On Virtual Instrument

With the develop ment o f modern industry, the factors that affect the power qua l-ity are more and more comp lex. The incre ment o f a ll k inds of non-linear power loadsaffects the norma l operatio n of e lectrica l equipme nt serious ly. There fore, accuratemeasure ment of power quality parameters and calibration of power qua lity ana lyzerplay a cruc ia l role in China’s economic deve lopme nt and safe production o f powersupply. The power quality a nalyzer calibration s ystem currently used in China, withmany shortcomings such as more measuring devices, high cost, comp licated o peration,large artificia l error, fewer functions, low accuracy and low le vels of auto mation,cannot meet the needs of the market. There fore, it is necessary to deve lop a mult i-functiona l computerized calibration syste m to achieve idea l purposes such as multi-function, low cost, good performa nce, and simp le structure.This d issertation brie fly introduces the mea ning and the status quo of powerquality ana lyzer calibratio n, points out the defects in traditio na l calibratio n system,deve lops a ca libration syste m o f power quality a nalyzer based on virtua l instrume nttechno logy. Many functio ns such as power quality data acquis itio n, real-time param-eter disp lay, data error ana lys is a nd calibration, database mana ge, data save and printare inte grated in this ca libration syste m. Based on the d iscuss ion o f the s yste m’scompos ition and virtua l instrument technolo gy, the error ana lys is and calibrationmethod of the power qua lity data as well as the realization of the system are paid greatattentio n to. According to the function, the power qua lity ana lyzer calibratio n systemcons ists of instrume nt communication a nd contro l module, the power quality dataanalys is and calibratio n module, the database module and data save and print module.Amo ng these modules, power quality data ana lys is and calibratio n module inc ludesanalys is and calibration of basic parameters, harmonic, three-phase unba lance factor,volta ge fluctuatio n and flicker parameters.Due to the usage of virtua l instrume nt techno logy, rich so ftware functions, si m-ple hardware structure and high inte lligence have been realized in this power qualityanalyzer calibratio n syste m, which make positive s ignifica nce in ens uring sa fe oper a-tion of power syste m, improving the effic ie ncy of the industry econo my and increas-ing new economic growth point for enterprises. The designed system can providegood testing technolo gy equip ment and effic ient ca libration tool for power industry, it has a broad applicatio n prospect.