Prediction of PV power quality: Total harmonic distortion of current

2013 ◽  
Author(s):  
James Rodway ◽  
Petr Musilek ◽  
Stanislav Misak ◽  
Lukas Prokop
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion

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 PENGARUH HARMONISA ARUS AKIBAT PENGGUNAAN BEBAN NON-LINIER TERHADAP HASIL PENGUKURAN kWhmeter ANALOG

2021 ◽  
Vol 11 (1) ◽  
pp. 34-40
Author(s):  
Made Wiwit Kastawan
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion

Penggunaan sumber tegangan non-sinusoidal atau beban non-linier pada sistem kelistrikan berdampak pada terbangkitkannya gelombang harmonisa arus. Gelombang harmonisa arus dapat mengakibatkan berbagai masalah, salah satunya adalah terjadinya kesalahan pada berbagai alat ukur yang terpasang pada sistem kelsitrikan tersebut. Dalam tulisan ini akan dibahas pengaruh gelombang harmonisa arus yang muncul sebagai akibat penggunaan beban-beban non-linier terhadap keakuratan hasil pengukuran konsumsi energi listrik oleh kWhmeter analog. Analisisnya dilakukan berdasarkan data yang diperoleh melalui pelaksanaan dua uji laboratorium berbeda yaitu pengukuran konsumsi energi listrik dengan beban linier (yang tidak menghasilkan gelombang harmonisa arus) dan pengukuran konsumsi energi listrik dengan beban non-linier (yang menghasilkan gelombang harmonisa arus dengan tingkat distorsi (total harmonic distortion, disingkat THD) berbeda. Hasil pengukuran konsumsi energi listrik dengan kWhmeter analog dan Power Quality Analyser (PQA) untuk masing-masing uji laboratorium akan dibandingkan untuk melihat perbedaannya dengan hasil pengukuran oleh PQA sebagai acuan.  karena PQA memiliki kemampuan untuk pengukuran true rms berbagai besaran listrik yang mengandung gelombang harmonisa. Analisis  terhadap data uji laboratorium menunjukkan bahwa harmonisa memiliki dampak atau pengaruh terhadap kesalahan pengukuran pemakaian energi oleh kWhmeter analog. Meski tidak meningkat secara signifikan namun semakin tinggi kandungan harmonisa arus maka akan semakin tinggi pula kesalahan pengukuran pemakaian energi listrik oleh kWhmeter analog. Lebih jauh, pengaruh harmonisa terhadap kesalahan pengukuran pemakaian energi oleh kWhmeter analog lebih signifikan untuk sistem kelistrikan tiga-fasa jika dibandingkan dengan sistem kelistrikan satu-fasa

scholarly journals Power Quality Improvement by Reduction of Total Harmonic Distortion (THD) using PWM Inverter

2020 ◽  
Vol 9 (2) ◽  
pp. 1641-1643
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Nonlinear Loads ◽  
Pwm Inverter ◽  
System A ◽  
Power Quality Improvement ◽  
Simulation Results ◽  
And Performance

In this paper, a PWM inverter is proposed for improvement of power quality i.e., reduction of total harmonic distortion (THD). The power quality problems reduce the lifetime and performance of equipments. The proposed system reduces the THD which is generated from the nonlinear loads. Because presence of harmonics leads to problems like overheating, failure of insulation etc. Here the simulation results of the proposed system is studied using MATLAB SIMULINK. Using the system, a lower THD is achieved which shows the effectiveness of the system.

PV based DG Power Quality Improvement Using Integrated D-STATCOM under varying Insolation

2021 ◽  
Vol 9 (11) ◽  
pp. 1848-1855
Author(s):  
Lakshmi Sravya Kanukolanu
Keyword(s):  
Power Quality ◽  
Power Plants ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Voltage Control ◽  
Electrical Energy ◽  
Total Harmonic Distortion ◽  
Static Synchronous Compensator ◽  
Pv Systems ◽  
Simulation Results

Abstract: The standalone grid connected Photovoltaic (PV) systems have been gradually increasing for generation of electrical energy due to ever increasing fuel and coal prices, as well as the environmental issues posed by conventional power plants. In this transition phase, power quality is at its expense, resulting in damage to equipment or appliances and lost in production. Inadequate power quality can be caused by network failures and switching operations, which primarily cause voltage dips, interruptions, transients, and network disturbances from loads which primarily produce flicker i.e., rapid voltage changes, harmonics and phase imbalance. In this paper PV is used as an external DC source for D-STATCOM (Distributed Static Synchronous Compensator) which is a FACTS device that can maintain and repair power quality limitations such as power factor correction, voltage control, load balancing and harmonic reduction. The PV-STATCOM system inverter is implemented by impending MPPT method using P&O algorithm so as to provide DC link voltage control and to improve transient response along with counteracting power quality issues. MATLAB/Simulink based simulation results are presented for the proposed PVSTATCOM model. The simulation results proves that the PV-STATCOM system has better Total Harmonic Distortion (THD) and good reactive power compensation at different irradiance levels. Keywords: Photovoltaic (PV) systems, D-STATCOM (Distributed Static Synchronous Compensator), Total Harmonic Distortion (THD), MPPT (Maximum Power Point Tracking), FACTS (Flexible AC Transmission System)

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

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