Harmonics Analysis of Inverter Circuits on Smart Grid System

Smart Grid System has Harmonics Distortions. Caused when switching inverters convert DC current into AC that lowers power quality and affects power generation system. Interference occurs in sinusoidal wavelengths of voltage or system currents that have frequency multiples of fundamental frequencies. Therefore, analysis is required based on IEEE Std 519-2014 standard which is for 20kV Bus voltage has a limit value of 3% for VIHD and 5% for VTHD, using ETAP software was conducted simulating the condition of the non-grid bus system has a VTHD value of 4.9%, while the on-grid system conditions that have inverters for buses have a VTHD value of 5.81%, and simulations before passive filters are installed in the 5th order (f = 250 Hz) with a VTHD value of 6.33%; VIHD 4.82% after installing passive filter VTHD value 1.88 %; VIHD 0.00 %, while in the 7th order (f=350 Hz) the VTHD value is 6.33%; VIHD3.33 % after installing passive filter VTHD value 1.88%; VIHD 0.00%. The passive filter used is a single tuned passive filter. Change the PF (Power Factor) value before filtering is installed on the distribution bus = 82.9%, after the passive filter installed is 88.1%.

Reducing of total harmonic distortion by simulating passive filters to suppress harmonic currents with the case: Faculty of Engineering Building, Universitas Kristen Indonesia Jakarta

Today’s electrical appliances use power electronics to save electricity. However, this equipment generates non-sinusoidal current, causing wave defect, expressed as total harmonic distortion (THD). As the %THD increases, the greater risk of equipment damage. For this reason, the research was carried out in the Faculty of Engineering Building, Universitas Kristen Indonesia Jakarta (FT UKI Jakarta) where there are many load combinations such as computers, various types of lights, laboratory equipment such as transformers, electric motors and so on. The research was conducted using quantitative method. Data collection is carried out directly in the main panel. Based on the measurement results, the calculation of the maximum load current (IL) and short circuit (ISC) is carried out. Through these values, it can be seen that whether the odd dominant harmonic values and orders meets the IEEE 519-2014 standards or not. Calculations and analysis of the measurement results have shown that the %THDI in the FT UKI building has not meet the standard. Therefore, it is necessary to simulate the filter design to reduce the %THDI, so that the results can meets the IEEE 519-2014 standard, which is below 5%.

Application of PI controller based active filter for harmonic mitigation of grid-connected PV-system

The recent trends show the interconnection of PV system with electric grid. With this configuration the issue of harmonics comes into existence. The mounting figure of power-electronic instruments has formed considerable impression on the power-quality of electric supply. Harmonics deformations have conventionally been handled amid the application of passive-LC filters. Active Filter has emerged as a good substitute for passive filters to reduce the harmonics to great extent as it has numerous benefits over the former filters. The active filter’s most vital part is the applied control strategies. Several researches are being under process to advance the functioning of the filter. One of the important control requirements of filter is the regulation of DC link up capacitor voltage. Here the voltage supervision of capacitor is being done using PI controller. The paper show current harmonics compensation of PV grid connected system using PI controller based active filter. Simulation outcomes have been shown which displays the harmonics are within the IEEE boundaries.

Utilization of Arduino Control in Mitigating the Hybrid Harmonics of DC/AC Inverter

This Paper deals with the implementation of Harmonics distortion in distribution system by using the method of hybrid of active filter and passive filters. The active filter is used to reduce the distortion present in the output. Boost converter is used to increase the voltage level. This boost converter is connected to the inverter, which is designed by using the MOSFET as a switch. In practical application the pulses for the inverter is given by using the Arduino control. By using this hybrid method, the total harmonics distortion is reduced to below the acceptable limit. Simulation for this proposed method is done by using the MATLAB simulink. Initially, fast fourier transform may found to mitigate harmonics. But emerging technologies like Arduino control is proved to simple and economical in carrying out the same task effectively.

Utilization of Arduino Control in Mitigating the Hybrid Harmonics of DC/AC Inverter

This Paper deals with the implementation of Harmonics distortion in distribution system by using the method of hybrid of active filter and passive filters. The active filter is used to reduce the distortion present in the output. Boost converter is used to increase the voltage level. This boost converter is connected to the inverter, which is designed by using the MOSFET as a switch. In practical application the pulses for the inverter is given by using the Arduino control. By using this hybrid method, the total harmonics distortion is reduced to below the acceptable limit. Simulation for this proposed method is done by using the MATLAB simulink. Initially, fast fourier transform may found to mitigate harmonics. But emerging technologies like Arduino control is proved to simple and economical in carrying out the same task effectively.