Improved Transformer Differential Protection by Adaptive Pickup Setting during Momentary Over-Fluxing Condition

The differential relaying scheme is universally adopted as the main protection for power transformer. In certain situations, like temporary over-fluxing, this differential protection may malfunction. This is due to unbalance in primary and secondary current, as the saturated core does not reflect equal ampere-turn on either side. This article presents detection of over-fluxing condition against the internal fault based on the fifth harmonic component of differential current. As per the estimated level of the fifth harmonic concerning the fundamental component of differential current, the pickup setting of percentage bias characteristic will be modified to avoid maloperation. Once the over-flux condition is sensed, the algorithm activates timer-based V/f protection to protect the equipment. The proposed algorithm is validated on PSCAD software and after the collection of data, MATLAB software is used for further validation. The proposed algorithm is validated under various test conditions like normal load, external fault, internal fault, and over-fluxing. It is observed that the algorithm accurately detects internal fault in the transformer or blocks the relay operation under momentary over-fluxing situations. Further, to assassinate the competency of the proposed scheme, a practical test is performed on a single-phase transformer available in laboratory. The data for various test cases are captured with the help of DSO, and the collected data has been migrated to computer where the proposed algorithm is examined. After analyzing all the results, it is cleared that the proposed algorithm can prevent transformer isolation during momentary over-fluxing conditions

Enhancing Student Progression Using Statistical Process Control

This presentation was given at the Production and Operations Management Annual Conference (POMS)

Using Statistical Process Control to Enhance Student Progression

Public interest in educational outcomes has markedly increased in the most recent decade; however, quality management and statistical process control have not deeply penetrated the management of academic institutions. This paper presents results of an attempt to use Statistical Process Control (SPC) to identify a key impediment to continuous improvement in the academic setting and to facilitate continual improvement of instructional performance. An illustration from an undergraduate degree program in business administration is provided

Evaluation of the Socio-Economic Survey and Statistical Metrics for Lambhvel Village, Gujarat State

This study is aimed to research the life of people of village Lambhvel, Gujarat, awareness about various government schemes, about their family, and what they are expecting from the government for the betterment of their life. This survey is part of NSS Village Camp 2023 which was held from 22nd May to 27th May at Lambhvel, Anand, Gujarat. This survey is done on 23rd May. Which total of the 40-person personal interview has taken at Lambhvel. Of 40 persons 30% are women and 70% are men. Of which 40% are self-employed and 15% are farmers only. 87.5% are having ration cards and out of  it, 70% of people are taking ration from it which means the BPL rate is very high in the village. 92.5% are having Aadhar card. An average of 5.075 persons are living in one house and each house has an average of 0.75 Girls and 1.075 boys in each house. And 1.825 Children in each house, which means there are 2 adults and 2 children in one house but we can also see that some house has 5 or 8 children in one house. The average income of one house by our survey is Rs 85300. This village has very less awareness about any government scheme because 17.5% of people are taking benefit of any Government scheme and most of the people out of 17.5% are taking benefit of Pradhan Mantri Ujjwala Yojana (PMUY) and 35% of people having Maa Card/ Aayushman Card. And most people want cleanliness in the city and a better education system in their village for their children