Design of a Low-Cost Smart Frequency Meter

An important step toward managing energy and costs in an effective and cost-saving manner is to monitor electrical equipment that consume electricity in the proper manner. The characteristics of an electrical power supply can alter in many different ways when electrical devices are used. During the use of electrical devices, the parameters of an electrical power system change in a lot of ways. These changes in the parameters required to be measured using accrued meters This paper presents the design and implementation of a frequency meter based on Arduino for a three-phase synchronous generator. In addition, it was used to detect the abnormal operation of a three-phase synchronous generator (at low and high frequencies). The proposed frequency meter displayed the measured parameters and the protection status of each data point directly on the LCD and took a serial print of the Arduino software program on the PC via a USB cable. A smart monitoring system for these operation conditions was designed using a Bluetooth module. One sensor has been used with the frequency meter: an AC voltage sensor type ZMPT101b. The frequency has been measured utilizing the ac voltage sensor signal, i.e., without using any external zero crossing detector hardware circuit.