Analysis of the performance of the mark-space method for determining the power in single-phase circuits

摘要

The electrical power transfer is an essential element of an energy system. Along with frequency and phase, electrical power influences the dimensions and costs involved. The paper presents an analysis of mark-space method, which offers a mathematical solving of power measurement in single-phase AC circuits. Remarkable that it can has analog solution implemented. The existence of electronic circuits with known possibilities, such as the pulse width modulation, absolute value and filtering with operational amplifier, allows the synthesis of specific schemes. This approach avoids multiplying operations that facilitate error generating. The main purposes are to follow the performance of such a circuit in different operating situations and present an example of schematics. Using specific simulation programs but not restricted to them, the results confirmed the method being analyzed.