Analysis of low-cost current sensors in the area of power engineering

Abstract

The range of the sensors, which are used for the measurement of electrical quantities recorded over a decade in an enormous growth. The sensor is established in many areas, such as in the energy technology, in drive technology or in the automotive industry. The demand as well as the request to the sensor and in particular for the current sensors have reshaped by technological progress. Accordingly the following problematic aspects are to consider, which as on the one hand, the potential-free transmission of the measured value (in the long distance) and on the other hand, the influence with relating to the sampling frequency of the measured value of current sensors in view of the switching frequency of power converters. Another aspect in this paper is the influence relating to the sampling frequency of the measured value of current sensors in view of the switching frequency of power converters. It will investigate how or whether the system behavior and the system dynamics changed by influencing the frequencies. A simulated model of the developed current sensor is to be installed in a system model, which contains a power converter and the electrical grid. An analysis should show whether it is necessary to increase the sampling rate of the current sensor, when the power inverter will work with a higher sampling frequency (e.g. 64kHz) in the future.