A new method for detecting spark in electrostatic precipitation

Abstract

Spark detection is an important problem in electrostatic precipitation. This paper proposes a new method for detecting the spark based on the load voltage variety. In order to obtain this variety, the control model of the power supply is established, and then the mathematical expression of the load voltage can be formulated. By analyzing the features of the spark breakdown, it is observed that the load voltage variety during the spark breakdown is much larger than that of normal condition. Therefore, the maximum variety of the load voltage under normal condition can be considered as the detection threshold. In addition, the control method which tracks the dielectric strength recovery curve is also presented. The simulations and experiments demonstrate that the proposed method is effective.