Unidade aritmética básica para transdução digital de parâmetros de potência.

Abstract

The commercially available Power Parameter Transducers have time constants in the order of 250 ms, which makes it impossible to detect disturbances occurring at shorter times. To solve this problem, was developed in the Department of Electrical Engineering of the Federal University of Paraíba Campus II, a Digital Transducer with time constant of the order of 16 ms, capable of detecting such disturbances. The developed Digital Transducer provides a central computer with the values ​​of Active (P) and Reactive (Q) power. These power calculations are performed in EPROMs and controlled by a microprocessor. This architecture allows only 160 samples per period with 10-bit accuracy. In order to improve the performance of the Digital Transducer, an Application Specific Integrated Circuit (ASIC) was developed that performed all its arithmetic functions. With this ASIC, the Basic Arithmetic Unit (UAB), it will be possible to perform 660 samples per period with 16-bit precision. The UAB will perform 32-bit Sum, Subtraction, Multiplication, and Division operations. Communication takes place via a single 16-bit input / output bus. The system used in the implementation of the UAB was ALLIANCE, a tool developed by the MASI / PARIS 6 laboratory.