As a flexible tariff mechanism,making a rational CPP implementation strategy and selecting suitable critical days are crucial to its successful implementation.

In this article,the authors analyze the aiguille voltage of the whole-bridge DC source converter circuit according to the mathematics model when the MOSFET transistor is shut and the instant voltage equations are obtained.

For this reason,this paper base actual data of the essence characteristic, to discuss calculate formula VaR means in the the aiguille and fat tail branch, and make use of the calculate formula to carry out demonstration analysis for the stock market.

The ore dressing testing and its actural practice of the Yinfengjian gold mine are introduced, and its flow chart is dwelled.

The reason of appearing peak voltage in IGBT(insulated gate bipolar transistor)absorber is discussed.

Using the peak voltage(ruled) in GJB 181 as the interferential source and the Pspice software,the peak voltage s influence on SSR s(working) state was analyzed and the reason which caused misoperation was found.

This paper summarizes three kinds of practical suppression method to turn off IGBT peak voltage,it discusses some issue of IGBT drive circuit,and introduces a kind of dynamic voltage rise control circuit.