Development of embedded system for energy analyzer

In recent decades, the subjects on environmentally friendly, energy saving, renewable energy resources, that scientists have been working on and new equipment that are developing day by day in technology invite us to protect our future in a better way. The increase in energy consumption and the gradual decrease in limited energy resources raise fundamental questions such as how much energy is produced, what is its efficiency, how it distributes to the end users. Not only on an individual basis, but also on a global basis research and development are carried out on this subject. In addition, required equipment usage in energy generation, distribution and utilization is increasing every day, too. In the common systems for monitoring power circuits, you need to install individual measuring devices e.g., Voltmeter, Ammeter, Oscilloscope, Wattmeter etc. separately because of the increasing harmonic currents and voltages in the grids. Our design yields an industrial analyzer that sense the current and voltage at the input then designed circuit transmits signals proportional levels to the MCU which will be analyzed based on some standards such as IEEE Std 1459TM2010 [1]. An A/D converter, converts the voltage and current signals to the digital representation at regular intervals. MCU periodically samples (f_sampling=1600 Hz, N=32, A/D resolution 12-bit) then analyze the voltage and current signals at regular intervals of time with the approximately *0,4 % error rate. After that, it stores the data of electrical variables which are analyzed. e.g., these electrical variables may be frequency, true RMS volts, true RMS amps, cos(φ) and even harmonic values, including energy variables. For the project ARM Cortex family as STM-32F405 and LCD-TFT screen which part number is HY-32D are one of the most important components. The features of this device completely provide our requirements with isolation circuits, fuses and another safety equipment for our PCB. As a summary, it is an objective of the thesis to develop an industrial analyzer which a single analyzer device that analyzes the variable parameters in a grid by eliminating the require of multiple measuring devices. Thanks to the LCD, with the compact design we are able to see all data only on a screen and it's completely mobilized. *The error rate depends on the f_sampling, N, and A/D resolution. Key Words: Embedded Systems, Arm Cortex, Energy Analyzer, Single Phase Analyzer, STM-32f429, Digital Signal Processing, Real-time Operating System