| Title |
Transient Current and Phase Noise Analysis to Reduce the Number of Sensors in the Energy Management System |
| Authors |
Joong-Ki Kim ; Dong-Hwa Shin ; Dongho Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2018.32.1.108 |
| Keywords |
Energy Management System ; Energy Monitor ; Current Sensor ; Transient Phenomena ; Phase Noise ; Reducing the Number of Sensors |
| Abstract |
A cheaper energy monitoring system, which is an essential component of the energy management system, is absolutely necessary for households or small and medium-sized buildings. This study examines a method of reducing the number of sensors used for an energy monitoring system. In the conventional power monitoring system, each electrical equipment needs its own sensor. However, if power consumption characteristics of each electrical equipment are utilized, multiple sensors can be replaced by a single one installed on a power bus to which multiple electrical equipment are connected. This paper proposes phase noise and current patterns in a transient state where each electrical equipment is turned on by its own power characteristics. A current pattern in a transient state is measured by time axis, while phase noise is converted to frequency axis by Fast Fourier Transform (FFT). Even when each electrical equipment is distant from the measurement point of a sensor, the identification method using phase noise obtained from frequency axis is still more useful since it is resistant to noise in an electrical cable. |