The Noise Of The Power System Data Acquisition Effects On Lossless Compression Of Power Quality

With many types of unbalanced load increases, the harmonics of the gridproblem, single-phase three-phase short circuit current unbalance, voltagefluctuation, nonlinear these problems more serious. On the one hand, if the powerquality is very bad, it will accelerate the aging of the insulating equipment,electrical equipment and communications systems reduce normal use efficiencyand utilization, so we study consumer power quality green electricity for our buildsystem is very helpful.As China’s smart grid construction proposed grid monitoring system has beenwidely distributed research and application. Compared to the previous powersystems, smart grid because the computer monitoring system and appears to bemore intelligent and efficient in the data acquisition system with the help of acomputerized system or power system controller can be obtained accuratelysimulate the action of time and performance parameters, These data can be storedin the memory in which to prepare for future analysis and full power range ofoperation. Collecting real-time data acquisition system not only occur related to thebehavior of the power system data, and will be collected in order to improve theperformance of the necessary design information acquisition system. Study of thesepower quality has become an important issue in today’s digital age, current andvoltage signals are applied before being analyzed and have been digitized, the gridvoltage current transformer signal after passing into digital samples, the convertedAccuracy can make progress every digital samples are significantly improved.With GPS, GPRS, synchronous vector constant application of newtechnologies to monitor grid monitoring system, so that it becomes efficient andstable, grid monitoring system to ensure the power supply is running in good order,is the healthy operation of modern power system prerequisite for stable and smoothdata flow monitoring objectives for achieving the fundamental guarantee ofintelligent grid. Our country and put into operation the number of grid monitoringdevices is growing rapidly in recent years, its performance and functionality is thespeed at which may be raised. However, the resulting massive amounts of databound to information storage, transmission and retrieval of enormous pressure, andmay even affect the entire power system information sharing and wide areameasurement safe and reliable operation. Power system data compressiontechnique is an effective method to solve the above problems, and in addition,enhance the quality of data collection is to improve its compression datacompression is another key way.This paper introduces the synchronous sampling, similarities and differencesbetween asynchronous sampling, analyzes power quality data acquisition system function modules, analysis of its features and working principle, from the inductivenoise introduced during acquisition source, through modeling analysis andcomparison, summed collection major source of noise in the circuit; Then, theweight of the noise source according to descending order of noise, especially forthe AD converter quantization noise and the noise of the PLL key analysis, thenumber of noise reduction measures, calculated using the noise reduction measuresto improve the signal to noise ratio of the post; Next, various noise sources wereanalyzed and various data processing data on electricity lossless compressioneffects, the most serious factors affecting results.