Non-Linear Load Leads to the Power Quality

All applications resulting from the rapid growth of industries using an increase in the use of modern electronic switches and purely nonlinear loading load to maintain modern civilization are the power leading to the existence of harmonics in the grid Resulting in power quality disturbance to the grid. Problems such as voltage distortion, parallel resonance of the PF correction capacitor, overheating and overload of the power transformer, meter error, power supply cable failure, interference of the telephone line and the communication line, deterioration of the motor efficiency, etc. are caused by the harmonic current flowing through the grid There is a possibility of occurrence. Additional motor stator and rotor heating, pulsating machine

The harmonic current and voltage in the grid are the result of the nonlinear load. Harmonics in the grid generate higher temperature electrical equipment and conductors, obstacles to variable frequency drive, and motor torque waves. The problem of power quality is the result of the harmonic frequency of the grid. When designing the grid, it is necessary to reduce harmonics. The serious impact of harmonics in the system is the increase in current in the system. This becomes more noticeable at the 3rd harmonic and the zero sequence current increases significantly. When designing a grid to drive a nonlinear load, this requires a lot of consideration.

Power conditioners are used to maintain predictable voltages under varying loads. Using a power supply regulator is important to ensure excellent power supply quality. Power quality is the ability of the equipment to consume the energy provided by the grid. In other words, it is compatibility between the power outlet and the device. If the voltage and frequency are within the normal tolerance range, the power quality is good. Poor power quality includes interference, voltage fluctuation, power surge and so on. An example of low power quality is surge due to lightning strikes during the storm. Another example is wiring failure in the panel, which can cause downstream distortion. Without protection of the power conditioner, poor power quality can cause various equipment problems such as failure, overheating, high maintenance cost, failure etc.