The Research And Realization Of The Analysis System On Load And Power Quality

The evaluation of Load and Power Quality will influence every aspects of power system, such as the power generation, transmission, supply and using. However, all the references being used nowadays in China are still as old as those published many years ago by the Ministry of Power System of China, and all the standards are incomplete and can only be used in stationary fields.This paper has made some research on the concerned national standards and the evaluation strategy of load and power quality, and designed a background data-analyzing system. The system can make the data transferred from the internet interface to the serial ports, and provides many wonderful tables to allow users to find and collect the rate of load-using and situations of power quality. The system also offers many kinds of curves and figures, such as load curves, three-phase current curves, voltage variation strip-figures, the variation duration cake-figures, typical harmonics curves and the three phase imbalance figures. Specially, the American CBEMA curve has been used to evaluate the transient power quality, and it is a good attempt to perfect the evaluation of load and power quality in our country. All the results can be reported with Excel tables. Lastly, the system platform can be validated by disposing the data.