Investigation of the Stochastic Harmonic Distortion Caused by Multiple Converters in Micro-Grid

The primary emphasis of this inquiry is on the influence of voltage-source converter harmonics on the power quality of a power system. The level of harmonic distortion produced by several VSCs may significantly vary in the presence of uncertainties, making it challenging to predict its behavior due to these fluctuations. These uncertainties may arise due to the selection of design parameters or the adjustment of system characteristics. Therefore, it is essential to use statistical techniques to quantify the levels of VSC harmonic distortion in the presence of uncertainty. The experimental assessment of the UDR's performance was conducted using a practical microgrid lab that included three VSCs. The MCS approach functioned as a benchmark for evaluating the precision of the anticipated UDR results. The UDR consistently achieved the expected results, saving a large amount of time compared to the MCS technique. Furthermore, the UDR findings closely aligned with the MCS strategy

Voltage Sag Mitigation by Using Dynamic Voltage Restorer (DVR)

Due to increasing complexity in the today’s power system, voltage sags and swells are now becoming one of the most critical power quality problems. Voltage sag is a short reduction voltage from nominal voltage, occurs in a short duration of time, they are bound to have a greater impact on the industrial customers. If the voltage sags exceed two to three cycles, then manufacturing systems making use of sensitive electronic equipment’s are likely to be affected leading to major problems. It leads to wastage of financial losses and resources. This is possible only by ensuring that uninterrupted flow of power is maintained at proper voltage levels. Electrical power utilities are looking for solutions to ensure high quality power supply to their customers, a lot of solutions have been developed, but this project tends look at the solving the problems by using custom power devices such as “Series active power filter (SAPF)”. This work describes the techniques of correcting the supply voltage sag and voltage in a distributed system. Among these, the distribution static compensator and the series active power filter (SAPF) are most effective devices based on the VSC principle. The series active power filter (SAPF) injects a voltage in series with the system voltage to correct the voltage sag and swell. Comprehensive results are presented to assess the performance of each device as a custom power solution

Effect of lactation length adjustment procedures on genetic parameter estimates for buffalo milk yield

The objectives of this study were to estimate the genetic parameters for milk yield unadjusted and adjusted for days in milk and, subsequently, to assess the influence of adjusting for days in milk on sire rank. Complete lactations from 90 or 150 days of lactation to 270 or 350 days in milk were considered in these analyses. Milk yield was adjusted for days in milk by multiplicative correction factors, or by including lactation length as a covariable in the model. Milk yields adjusted by different procedures were considered as different traits. Heritability estimates varied from 0.17 to 0.28. Genetic correlation estimates between milk yields unadjusted and adjusted for days in milk were greater than 0.82. Adjusting for days in milk affected the parameter estimates. Multiplicative correction factors produced the highest heritability estimates. More reliable breeding value estimates can be expected by including short length lactation records in the analyses and adjusting the milk yields for days in milk, regardless of the method used for the adjustment. High selection intensity coupled to the inclusion of short length lactations and adjustment with multiplicative factors can change the sire rank.

electronics, Flexible AC Transmission Systems (FACTS)

Abstract—With the rapid development of powe

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P Mishra, AS Ali, SV Kuralkar, SP Dixit, RAK Aggarwal, PS Dangi and NK Verma (2013) Analysis of genetic diversity in Berari goat population of Maharashtra state. Journal of Applied Animal Research 3 (3) : 553 - 559.Not AvailableNot Availabl