Transformer Oil Chromatographic Analysis of Data Anomalies Caused by Harmonics

2014 ◽  
Vol 543-547 ◽  
pp. 713-716
Author(s):  
Hua Zhang ◽  
Chaun Zong Zhao ◽  
Qing Hao Wang ◽  
Rui Guo Chen ◽  
Yong Wang ◽  
...  
Keyword(s):  
Data Analysis ◽  
Chromatographic Analysis ◽  
Load Condition ◽  
State Standards ◽  
Low Energy ◽  
Transformer Oil ◽  
Test Results ◽  
Chromatographic Data ◽  
Harmonic Currents ◽  
Harmonic Content

According to the 66kV transformer blackout phenomenon, the oil chromatogram data analysis, found that the transformer existed temperature (676 °C) and low energy discharge defect. Through measuring the harmonic content to and analyzing the load condition, test results show that the grid was injected harmonic currents by the substation non-linear loads, its 5 times,7 times, 11 times, 13 times harmonic were higher than the state standards, this shows that the harmonic is the cause of the chromatographic data of transformer oil abnormal

On the effect of the periodicity of diagnostic measurements on improving the reliability of high-voltage transformers

2019 ◽  
Vol 12 (1) ◽  
pp. 18-21
Author(s):  
V. A. Tikhonov
Keyword(s):  
Service Life ◽  
High Voltage ◽  
Chromatographic Analysis ◽  
Aluminum Industry ◽  
Early Stage ◽  
Diagnostic Methods ◽  
Transformer Oil ◽  
Operating Voltage ◽  
Dissolved Gases ◽  
The Aluminum Industry

The influence of the periodicity of diagnostic measurements on the operational state of high-voltage transformers is considered. Examples of defects of switching devices of converter transformers and methods for their detection are given. The rationale for the importance of recognition of defects at an early stage of their occurrence is given. The influence of the multiplicity of overvoltages on the service life of converter transformers in the aluminum industry is investigated. Based on the analysis of the service life of converter transformers of one of the powerful aluminum plants, where 83% of converter transformers have exhausted their standard service life, it is shown that in 40% of cases it would be possible to avoid their failures, with timely detection and elimination of emerging defects. Examples of defects of OLR (on-load regulators) of converter transformers and methods for their detection are given. The importance of recognition of defects at an early stage of their occurrence is substantiated. A method for chromatographic analysis of dissolved gases in transformer oil has been developed for the qualitative determination of defects and ways to eliminate them. Examples of diagnostics of converter transformers at operating voltage and working load are given, providing the best quality operational characteristics of converter transformers. The periodicity of diagnostic measurements and the reduction of defects and failures has been substantiated. The question of diagnosing the state of the converter transformer TDNP-40000/10 at an enterprise of the aluminum industry is investigated. Currently, diagnostic methods are being developed based on chromatographic analysis of dissolved gases in transformer oil. The presented method of evaluating the operating parameters of transformers allows for the safe operation of high-voltage transformers and enables to increase the reliability of the power supply scheme of aluminum industry plants.

PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS ADOBE FLASH CS3 PROFESSIONAL PADA MATERI PENYAJIAN DATA

2020 ◽  
Vol 2 (2) ◽  
pp. 70-76
Author(s):  
Savitri Septiara Pratiwi ◽  
Ana Setiani ◽  
Novi Andri Nurcahyono
Keyword(s):  
Data Analysis ◽  
Junior High School ◽  
Random Sampling ◽  
Interactive Learning ◽  
Simple Random Sampling ◽  
Mathematical Understanding ◽  
Test Results ◽  
Analysis Techniques ◽  
Adobe Flash ◽  
Is Research

The purpose of this research are : 1) knowing the process of developing interactive with using Adobe Flash CS3 Professional media, 2) knowing the effectiveness of interactive learning with using Adobe Flash CS3 Professional media, 3). knowing the ability of students' mathematical understanding after using the Adobe Flash CS3 Professional media. The type of research is Research and Development (R & D) with One-Group Pretest-Posttest. The research was conducted at Mardi Waluya 2 Sukabumi Junior High School in the 2018/2019 semester event. The writer take the population of this study is on VII class. The sample used simple random sampling and for the instruments used were validation questionnaires media and tests. Data analysis techniques are using the Likert scale for validation questionnaires media, using the T test to determine effectiveness, and N-Gain to determine the increase in students' mathematical understanding skills. Interactive learning media are valued by media experts and material experts, with the results obtained that are valid so that they can be used in learning. The results of the effectiveness test are Thit (8.78)> T table (1,699) with a significant level used which is 5%. With high criteria of N-Gain test results are 75.61. Based on the results of these studies, interactive learning with using Adobe Flash CS3 Professional media can be effective in learning and can improve students' of mathematical understanding skills.

THE EFFECT OF ONLINE VIDEO BLOG ON STUDENTS’ ACHIEVEMENT OF PASSIVE VOICE IN 4J OPERATION KENDARI

2020 ◽  
Vol 5 (2) ◽  
pp. 125
Author(s):  
Raden Alifian Setiawan ◽  
Hanna Hanna ◽  
Alberth Alberth
Keyword(s):  
Data Analysis ◽  
Real World ◽  
T Test ◽  
Test Design ◽  
Online Video ◽  
Test Results ◽  
Multiple Choice Questions ◽  
Passive Voice ◽  
Paired Sample ◽  
Post Test

The use of videos in education makes it possible to overcome practical real-world constraints and explore far greater possibilities provided by digital spaces, especially for the video uploaded in online platform such as blog. This study examines whether online video blog as media have a significant effect on students’ achievement of passive voice. It used pre-experimental (one group pre-test and post-test) design. The samples of this study were 10 students at 4J Operation. A pre-test and post-test were conducted by using multiple choice questions as the instruments. Data analysis was through paired-sample t-test. Results showed that there was an increase in mean score of pre-test (49,1) and post-test (63,5). Data from Paired Sample t-test showed that Sig. (2-tailed) was 0.000 which was smaller than .05 which means that there was significance difference in mean score after employing treatment.

Towards Hardware-driven Design of Low-energy Algorithms for Data Analysis

2015 ◽  
Vol 43 (4) ◽  
pp. 15-20 ◽  
Author(s):  
Indre Zliobaite ◽  
Jaakko Hollmen ◽  
Lauri Koskinen ◽  
Jukka Teittinen
Keyword(s):  
Data Analysis ◽  
Low Energy

MENINGKATKAN KETERAMPILAN MENULIS PUISI MELALUI MEDIA TULISAN BERGAMBAR (MEME) DI INSTAGRAM PADA PESERTA DIDIK KELAS VIII G SMPN 24 SURABAYA

Buana Bastra ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 26-31
Author(s):  
Prily Yulia Utomo Putri ◽  
Tri Indrayanti
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Test Data ◽  
Writing Skills ◽  
Test Results ◽  
Population Activity ◽  
Data Analysis Technique ◽  
Analysis Technique ◽  
Class Viii

This research is a research follow class by using the secound cycle that there is the first cycle and cycle II. On the cycle I and cycle II each cycle there four stage of the (1) planning, (2) implementation of action, (3) observations, and (4) reflection. Each cycle has two meetings in one week, namely the first meeting and the second meeting with the allocation 2 x 40 minutes of each meeting. Subject in research is learners class VIII G SMPN 24 Surabaya totaling 37 learners contained 16 learners men and 21 learners woman. This school is located in Jl. Kebraon Indah Permai Blok K/23 A Surabaya. Data collection techniques to use the observation and test, data analysis technique using the percentage of. Based on the results of data analysis, it can be concluded that using pictorial writing media on the meme on Instagram can improve the writing skills of class students VIII G SMPN 24 Surabaya. This can be seen from (1) population activity in the cycle I 84,61% on the cycle II 100%, (2) activity learners in cycle I 83,44% on the cycle II 90,20%, (3) the test results writing skills poerty in cycle I 56,73% one the cycle of II increased 83,70%.

scholarly journals Implementasi Usability Testing dalam Evaluasi Website Sekolah

2020 ◽  
Vol 9 (3) ◽  
pp. 420-426
Author(s):  
Susan Dian Purnamasari ◽  
Firamon Syakti
Keyword(s):  
Information Technology ◽  
Data Analysis ◽  
Data Collection ◽  
Usability Testing ◽  
The Internet ◽  
Test Results ◽  
Testing Techniques

One of the products of information technology that is common today is the school website. Where the school website is the spearhead for schools in disseminating information to related parties. The most important aspect of a website is the usability aspect because it greatly affects visitor convenience. The use of the website for disseminating information is also used by SMK Negeri Sumsel and the school's main portal on the internet. For that to see the importance of the usability aspect, this study aims to see the level of usability of the SMK Negeri Sumsel website. In measuring the level of usability, usability testing techniques are used with the stages of preparation, selecting respondents, data collection and data analysis. The test results show that the usability aspects on the website such as errors, learnability, memorability and satisfaction get good ratings while the efficiency aspects are not categorized as good.

scholarly journals Hubungan Keaktifan Ekstrakurikuler Pendidikan Keperamukaan Dengan Sikap Disiplin Siswa Kelas Tinggi SDN 36 Kota Bengkulu

2020 ◽  
Vol 3 (2) ◽  
pp. 243-250
Author(s):  
Rika Marlina ◽  
Lukman Lukman
Keyword(s):  
Data Analysis ◽  
Significant Relationship ◽  
Primary Schools ◽  
Quantitative Research ◽  
Significance Test ◽  
Entire Population ◽  
Student Discipline ◽  
Test Results ◽  
High Class ◽  
The Relationship

This study aims to determine the relationship between the activeness of students following extracurricular scouting education with student discipline attitudes. This research is quantitative research. The research method used is the correlation with the type of product moment design. The population in this study were all high-class students who took extracurricular scouting education. Sampling using random sampling but the sample in this study the entire population because it is less than 100 then the entire population is sampled with a total of 57. The research instrument used was a questionnaire sheet. Prerequisite test data analysis using tests of normality, homogeneity and hypothesis. This technique is used to determine the significant relationship between independent and dependent variables by comparing r_calculations and r_tabels with a significant level of 5%. Based on the results of data analysis, the value of r_calculations= 0.66>  r_tabels= 0.266, which means that there is a significant relationship between activeness in scouting extracurricular education and disciplinary attitude. Furthermore, the significance test results obtained t_calculations = 6.8 ? t_tabels= 1.67303 means that there is a significant relationship between variables for the entire population with a contribution of 43.56% between the activities of joining extracurricular scouting education with student discipline attitude. It was concluded that Ha was accepted where there was a relationship between the activities of joining the scouting extracurricular education with the discipline attitude of high class students at 36 Primary Schools in Bengkulu City.

scholarly journals MOTIVASI BERPRESTASI DENGAN ADVERSITY QUOTIENT PADA SISWA MADRASAH ALIYAH DI KOTA PALEMBANG

2019 ◽  
Vol 5 (1) ◽  
pp. 74-82
Author(s):  
Rima Melati Farisuci ◽  
Budiman Budiman ◽  
Lukmawati Lukmawati
Keyword(s):  
High School ◽  
Data Analysis ◽  
Achievement Motivation ◽  
Quantitative Research ◽  
Hypothesis Test ◽  
Senior High School ◽  
Test Results ◽  
Spearman Rank ◽  
Analysis Methods ◽  
Data Analysis Methods

This research aims to know thecorrelation between Achievement Motivation with Adversity Quotient for Students at Senior High School Palembang and used the correlational quantitative research. The hypothesis proposed in this research is there is a correlation between Achievement Motivation with Adversity Quotient for Students at Senior High School Palembang. The research sample are 68 people consisting of 3 classes with ages ranging from 16-18 years. Data Analysis methods use the spearman rank technique and SPSS Version 23 for windows. Hypothesis test results show a significance value of 0,037  where is p<0.05, it means there is correlation between Achievement Motivation with Adversity Quotient for Students at Senior High School Palembang. Other word that one of the factors that can influence adversity quotient is achievement motivation.

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