IoT BASED INTELLIGENT METER

Intelligent meter is a device that record and display the user’s power consumption in real time. The device has two sensors, one voltage sensor and one current sensor, these devices measure the voltage and current, respectively. Other major components include: ATtiny 85, Bolt Wi-Fi Module with ESP 826612E and 4 channel 5V relay all this work at 5V=Vcc. The recorded data is displayed using a custom-made mobile application. The measured voltage and current in real time are given to A3 and A2 pin of ATtiny 85 from which ATtiny 85 is interfaced with Bolt ESP 8266 to store the measured data in real time to the online server. The interfacing of Bolt ESP 8266 and ATtiny 85 is done by connecting the Tx and Rx pin of the Bolt ESP 8266 to the 0 PWM and 1 PWM of the ATtiny 85 as shown in the circuit diagram The Bolt ESP 8266 is again interfaced with a 4-channel relay module to switch on and off the necessary circuit here. The relay module interfaced with Bolt ESP 8266 is acts as a remotely control switch. The Bolt ESP 8266 is programmed in such a way that it records the measured voltage and current and control the relay module when it is needed. The recorded data is stored in the online server and the stored data can be displayed by using a mobile application. The relay can be controlled by this mobile application to switch off unwanted electrical equipments to control and reduce the usage of electrical power. By using Intelligent meter user can observe power usage and control the power usage in such a way that the user can optimise the power usage and reduce power wastage.

SERVO CONTROLLED VOLTAGE STABILIZER (SCVS)

Voltage received from mains at the input of SCVS is continuously sensed by the sensing circuit and gives feedback to the main control circuit which consists of a microprocessor. This microprocessor continuously receives values of input voltages and compares them with the reference value embedded in its program. Whenever there is a high or low voltage at the input of SCVS, the microprocessor gives a trigger to the motor driver. Based on the amount of high voltage or low voltage observed at the input, the motor driver moves the servo motor across the winding of the autotransformer to increase or decrease the number of winding and hence the voltage across the primary Buck-Boost transformer. The servo motor shaft is connected to the primary of the Buck-Boost transformer and when there is a change in voltage across the primary of the buck-boost transfer, the induced voltage across its secondary also changes. The motor moves in such a way that proper voltage is applied across the Buck-Boost primary so that the output voltage will be equal to the set or desired output voltage of the servo stabilizer. This process takes place continuously to correct input voltages. In the case of the 3-Phase Automatic Voltage Regulator, there is an independent phase-controlled unit for each of the three phases separately, (essentially) to check if there are 3 Single-Phase Servo Stabilizers in one three-phase stabilizer.