scholarly journals Analisa Total Harmonic Distortion dan Losses Setelah Beroperasinya Distributed Generation di Program Studi Teknik Elektro Universitas Udayana

2019 ◽  
Vol 6 (1) ◽  
pp. 125
Author(s):  
Gregorius Reza Dwi Nugroho ◽  
I Wayan Rinas ◽  
I Wayan Arta Wijaya
Keyword(s):  
Power Plant ◽  
Distributed Generation ◽  
Electrical Engineering ◽  
Harmonic Distortion ◽  
S Phase ◽  
Electric Power System ◽  
Total Harmonic Distortion ◽  
Study Program ◽  
Lc Filter ◽  
T Phase

In the Electrical Engineering Study Program, Udayana University, a Solar Power Plant was installed with a power of 26.4 kWp, a Wind Power Plant with a power of 5 kWp and a Diesel Power Plant with a capacity of 20 kVA. The size of harmonics in the electric power system is called Total Harmonic Distortion (THD). THDi's research results at DH Electrical Engineering Building of Udayana University before the operation of Distributed Generation (DG) were that R phase was 9.91%, S phase was 10.86%, and T phase was 9.85%. THDi value after the operation of Distributed Generation, R phase was 16.05%, S phase was 17.53%, and T phase was 15.70%. THDi value with LC filter, R phase was 4.0%, S phase was 5.52% and T phase was 3.97%. THDv value before the operation of Distributed Generation, R phase was 0.08%, S phase was 0.48% and T phase was 0.47%. THDv value after the operation of Distributed Generation, R phase was 0.24%, S phase was 0.44% and T phase was 0.49%. THDv value with LC filter, R phase was 0.01%, S phase was 0.01% and T phase was 0.02%. The results of the research showed that losses before the operation of Distributed Generation were 115.53 Watts and the value of losses after the operation of Distributed Generation had increased to 130.07 Watts.

Islanding Detection in a Distribution System with Modified DG Interface Controller

2017 ◽  
Vol 6 (3) ◽  
pp. 135 ◽  
Author(s):  
Abbineni Sai Subhadra ◽  
P.Linga Reddy ◽  
Shailesh . B Modi
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Detection Methods ◽  
Islanding Detection ◽  
Detection Zone ◽  
Current Harmonics ◽  
Crucial Problem

Islanding detection of Distributed Generation (DG) is considered as one of the most important aspects when interconnecting DGs to the distribution system. It was the crucial problem in distributed generation. This detection phenomenon having a great importance. These detection methods are divided into active and passive islanding detection. These two methods are based on changing in parameters such as frequency, voltage and current harmonics. But these methods have some challenges such as reduction in power quality and large Non Detection Zone (NDZ). In this paper, the proposed method is change of Total harmonic distortion (THD) will be studied for islanding detection diagnosis. The studied system was considered by following the standard IEEE-1547 and UL-1741.The system was simulated using MATLAB/ SIMULINK.

scholarly journals Electromagnetically Compatible and Virtual Flux DPC Control Techniques for 3-Phase Distributed Generation Fed by Active Rectifier

2020 ◽  
Vol 9 (3) ◽  
pp. 2295-2301
Keyword(s):  
Distributed Generation ◽  
Control Strategies ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Control Mechanisms ◽  
Direct Power ◽  
Control Techniques ◽  
Active Rectifier ◽  
Virtual Flux ◽  
Active Rectifiers

This paper gives different control mechanisms comparison for active rectifiers fed grid connected 3-phase distributed generation systems from non-conventional energy sources. The control strategies presented here are Direct Power Control, 2 other DPC methods DPC to reduce CM voltage emissions that are EMC-I-DPC and EMC-II-DPC. Another two strategies are also presented with a concept of virtual flux i.e EMC-I-VF-DPC and EMC-II-VF-DPC. MATLAB/Simulink software is used to implement the so called techniques and the parameters like are injected current into electric grid , %Total harmonic distortion of current injected vs. generated power, %Total harmonic distortion of current injected vs DC link voltage (Vdc) and %Total harmonic distortion of current injected vs CM voltages are shown.

HASIL AUDIT ENERGI DI INDUSTRI TEKSTIL

2010 ◽  
Vol 6 (1) ◽  
Author(s):  
Achmad Hasan
Keyword(s):  
Power Plant ◽  
Power Quality ◽  
Power Factor ◽  
Electric Energy ◽  
Harmonic Distortion ◽  
Electrical Energy ◽  
Total Harmonic Distortion ◽  
Energy Audit ◽  
Hydro Power ◽  
Installed Capacity

Energy audit is one way to plan for optimizing the supply and use of energyneeded by the industry. Portrait of the use of electrical energy used in textileindustry supplied from PT.PLN (Persero) with the power contract for 23000 kVAand POJ Power (Mini Hydro Power Plant, Jatiluhur) with installed capacity of5800 kVA. Especially for electric energy supplied from POJ Power, status ofelectricity continues to be a contract with the manager of POJ Power Jatiluhur.Based on the results of measurement of power quality with PQA Hioki 3197 is asdescribed in the previous section, it can be seen that: (a) Voltage magnitude atsome of the panel is high (about 250 V), (b) The power factor is very low, (c)Generally, voltage and current THD (Total Harmonic Distortion) is very high.Kata kunci: energi, listrik, penghematan, filter harmonik, faktor daya

scholarly journals Power Quality Assessment of Perturbed Power System Implementing Fuzzy Logic and Discrete Wavelet Transform

2019 ◽  
Vol 9 (1) ◽  
pp. 4711-4717
Keyword(s):  
Wavelet Transform ◽  
Power System ◽  
Discrete Wavelet Transform ◽  
Power Quality ◽  
Quality Index ◽  
Harmonic Distortion ◽  
Electric Power System ◽  
Total Harmonic Distortion ◽  
Discrete Wavelet ◽  
Non Linear

A novel power quality index (PQI) is determined in this paper which helps in determining the power quality under non-sinusoidal condition. Power quality monitoring is important due to exponential growth of non linear loads in electric power system. As non linear loads creates the distortion level in distribution system so it is highly necessary to measure power quality index. The innovative power quality index has been found out by considering three component such as Representative quality factor(RQPF), Detailed pollution factor(DPF), Total harmonic Distortion(THD). When total harmonic distortion of voltage(THDV) and Total harmonic distortion of current(THDI ) amalgamation occur then THD has been formed using fuzzy inference system. An experimental model has been developed to verify the PQI under different cases by measuring voltage and current both on the source side and utility side . The measured voltage and current are reformulated as wavelet function using discrete wavelet transform (DWT) to calculate referred power quality factors . This new power quality index has been validated through hardware model to justify its importance under different non-sinusoidal conditions.

Improvement of Solar Energy System Under Partial Shading Conditions in Koneru Lakshmaiah Education Foundation

2018 ◽  
Vol 7 (1.8) ◽  
pp. 197
Author(s):  
B Bhargavi ◽  
P Linga Reddy
Keyword(s):  
Solar Energy ◽  
Harmonic Distortion ◽  
Energy System ◽  
Total Harmonic Distortion ◽  
Solar Photovoltaic ◽  
Pv System ◽  
Partial Shading ◽  
Pv Array ◽  
Pv Module ◽  
Lc Filter

This paper consists of grid connected Solar photovoltaic (SPV) system. An output of SPV depends on the irradiation and temperature. Sometimes PV module is shaded due to nearby buildings, passing clouds etc. Power extracted from such partially shaded PV array is reduced. . The PV system at KLEF deemed to be university is considered. Total Harmonic Distortion (THD) and the output powers  are  computed using Matlab/Simulink using LC filter .These are compared with the actual values measured from the existing system . It is found that percentage of THD is reduced.  

Islanding Detection in a Distribution System with Modified DG Interface Controller

2017 ◽  
Vol 6 (3) ◽  
pp. 133
Author(s):  
Abbineni Sai Subhadra ◽  
P. Linga Reddy ◽  
Shailesh B. Modi
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Detection Methods ◽  
Islanding Detection ◽  
Detection Zone ◽  
Current Harmonics ◽  
Crucial Problem

Islanding detection of Distributed Generation (DG) is considered as one of the most important aspects when interconnecting DGs to the distribution system. It was the crucial problem in distributed generation. This detection phenomenon having a great importance. These detection methods are divided into active and passive islanding detection. These two methods are based on changing in parameters such as frequency, voltage and current harmonics. But these methods have some challenges such as reduction in power quality and large Non Detection Zone (NDZ). In this paper, the proposed method is change of Total Harmonic Distortion (THD) will be studied for islanding detection diagnosis. The studied system was considered by following the standard IEEE-1547 and UL-1741. The system was simulated using MATLAB/ SIMULINK.

scholarly journals APLIKASI TAPIS PELEWAT RENDAH LC (LOW PASS LC FILTER) UNTUK MEREDUKSI DISTORSI HARMONISA PADA LAMPU HEMAT ENERGI

2012 ◽  
Vol 16 (4) ◽  
pp. 177
Author(s):  
Priyo Sasmoko ◽  
Subali Subali ◽  
Teguh Yuwono
Keyword(s):  
Power System ◽  
Energy Saving ◽  
Electric Power ◽  
Harmonic Distortion ◽  
Electric Power System ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Lc Filter ◽  
Office Lighting

Priyo Sasmoko, Subali, Teguh Yuwono, in this paper explain that harmonic (current or voltage) is one of the problems that has to be solved in electric power system, especially that caused by non-linear loads. Harmonic could cause bad impacts for the electric components that sensed it. It is almost certain that using of fluorescent lamp with electronic ballast or it is called energy saving lamp can cause harmonic in electric power system. Considering of the using of energy saving lamp is increased fairly fast as residence and office lighting, so it is important to analyze and solve the harmonic that caused by energy saving lamp. From the harmonic analysis, we can know the harmonic distortion caused by energy saving lamp. And there are some efforts to reduce such harmonic distortion by using a Low Pass Filter. Keyword: power quality, harmonic, low pass filter.

scholarly journals Perancangan Sistem Grid Tie Inverter pada Pembangkit Listrik Tenaga Surya

2019 ◽  
Vol 7 (2) ◽  
pp. 339
Author(s):  
SITI SAODAH ◽  
SRI UTAMI
Keyword(s):  
Harmonic Distortion ◽  
Control Process ◽  
Switching Control ◽  
Boost Converter ◽  
Buck Converter ◽  
Total Harmonic Distortion ◽  
Control Grid ◽  
Two Stage ◽  
Grid Systems ◽  
Lc Filter

ABSTRAKGrid Tie Inverter (GTI) merupakan inverter yang digunakan untuk mengubah energi yang dihasilkan panel surya berupa arus searah (DC) menjadi arus bolakbalik (AC). Keluaran dari GTI berupa bentuk gelombang sinusoidal yang masih belum ideal dan mempunyai nilai Total Harmonic Distortion (THD) di atas 3% serta nilai efisiensi belum mencapai 90%. Pengurangan nilai THD dan peningkatan efisiensi dapat dilakukan melalui proses kontrol switching pada inverter. Penelitian ini mengusulkan inverter dengan boost converter dua tahap, buck converter dua tahap, rangkaian switching control inverter, H-Bridge inverter dan rangkaian LC filter. Teknik switching dari inverter yang diusulkan terdiri dari kombinasi modulasi lebar pulsa sinusoida dan gelombang persegi. Berdasarkan hasil pengujian didapatkan nilai THD sebesar 4,97%. Terdapat selisih sebesar 1,97% dari nilai awal perancangan. Untuk efisiensi rata-rata inverter off-grid (tidak terkoneksi dengan PLN) sebesar 89,48% dan 79,4% untuk inverter on-grid (terkoneksi dengan PLN).Kata kunci: GTI, boost converter, buck converter, switching control,grid, THD. ABSTRACTGrid Tie Inverter (GTI) is an inverter used to convert energy resulted by solar panels in the form of direct current (DC) to alternating current (AC). The output of GTI is unideal sinusoidal and having Total Harmonic Distortion (THD) above 3% and efficiency below 90%. Reducing the THD value and increasing efficiency can be done through switching control process on inverters. This research proposed an inverter using two-stage boost converter, two-stage buck converter, an inverter switching control circuit, H-Bridge inverter and LC filter circuit. The switching technique of the proposed inverter system combined sinusoidal and square wave width modulation. The result showed THD of the proposed system is 4.97%, and still, there is a difference of 1.97% of the desired value. For average efficiency of off-grid systems (not connected with State Electricity Company/PLN) is 89.48% and 79.4% for on-grid systems (connected with PLN).Keywords: GTI, boost converter, buck converter, switching control,grid, THD

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