Effective Operation Method by Interdependent Use of Condenser Energy of the Voltage Transient Sag Compensator with Controlled Gradational Voltage

Abstract

This paper presents the efficient operation method by interdependent use of condenser energy on the new concept of voltage transient sag compensator. This compensator consists of the series connection inverter units, and each inverter unit generates a different output voltage by 2ⁿ times. Namely, in this system, the compensation energy is accumulated in each inverter unit's condenser charged with different voltage by 2ⁿ times. The method proposed here, in any case of various levels of transient voltage sags on the power line, provides the efficient use of condenser energy of all these inverter units. The method of interdependent use of condenser energy is also verified by the experiment.