Research About Economical Evaluation of Multi Power Quality Indexes of Automobile Industry

This article analyze the case of power quality in automobile manufacturing processing, there are several indexes exceed the limits, which are caused by the manufacture of automobiles. Then we find out that there are mainly four procedures may cause excess of power quality, which are stamping, soldering, coating and final assembly. On this basis, we aimed at the power quality of these four procedures, we summarize lots of problems that had appeared during all these four nodes. We collect several important indicators of power quality during the process, such as voltage sag and voltage swell, harmonic current, three-phase voltage unbalance, etc. Then we put forward a new method called “Significant indexes rapid economical evaluation” to do the estimation about power quality of the automobile industry. Because the entire car production line is highly integrated, any problems in the process will cause the entire production line to be shut down. By using “Significant indexes rapid economical evaluation” method, we can get the result of economic loss from every procedure of automobile industry. We can also obtain a clear status of economic losses from the evaluation result, then we can give advice to the improvement for the automobile industry production line, so that they can reduce the risk of the whole factory.