Proposal of a Power Quality Analyzer for the new Brazilian Distribution Procedures (PRODIST)

Along with the continuous expansion of photovoltaic (PV) power generation, different capacity of grid connected PV system is gradually increased. China's first residential grid-connected PV system has interconnected successfully in QingDao and operated normally. This document analyzed electrical connected diagram of grid-connected PV system. Using power quality analyzer, the online power quality is monitored and analyzed. When PV power generation is low efficiency of operating state, harmonic current is over distortion limits. Monitoring data was simulated through electrical power standard source. To ensure power metering accuracy under harmonic, the watt-second method is proposed. Testing results show that smart electrical meter can meter accurately within 20 times harmonics.

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Design of Power Quality Analyzer Based on Labwindows/CVI

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.466-467.759 ◽

2012 ◽

Vol 466-467 ◽

pp. 759-762 ◽

Cited By ~ 1

Author(s):

Fan Yang ◽

Hui Zhao

Keyword(s):

Power Quality ◽

Virtual Instrument ◽

Electric Power System ◽

Quality Analysis ◽

Harmonic Amplitude ◽

Quality Analyzer ◽

Instrument Technology ◽

Analysis System ◽

Hardware Circuit ◽

Design Ideas

The traditional quality analysis system has many disadvantages such as the bulky, expensive, fixed functional modules, poor extension, monotonous display etc. Combined with the virtual instrument technology, the paper propose design ideas of instrument Virtual power quality analysis based on LabWindows/CVI, including design of hardware circuit and software, obtain harmonic amplitude and phase by making use of fast Fourier transform. The analyzer has high accuracy, stable, and good anti-jamming performance, meet the electric power system testing requirements.

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Analisis Pengaruh Peralatan Laboratorium Terhadap Kualitas Daya Pada Laboratorium Elektroteknika Dasar

ELKHA ◽

10.26418/elkha.v9i1.21422 ◽

2017 ◽

Vol 9 (1) ◽

pp. 23

Author(s):

Jamhir Islami

Keyword(s):

Power Quality ◽

Quality Analyzer

Abstract– Meningkatnya penggunaan beban non-linier pada pada laboratorium dapat menyebabkan munculnya harmonisa yang dapat mengganggu sistem distribusi energi listrik. Dengan melakukan pengukuran secara langsung menggunakan Fluke 43B Power Quality Analyzer pada beberapa peralatan laboratorium, maka dapat diketahui bahwa harmonisa dapat memperburuk kualitas daya yang dapat meningkatkan rugi-rugi pada sistem distribusi energi listrik, sehingga terjadinya pemborosan energi. Dalam penelitian ini pengukuran dilakukan pada beberapa jenis peralatan laboratorium seperti osiloskop, komputer, catu daya DC, dan sebagainya. Setelah diteliti, maka beban lampu hemat energi (LHE) dan komputer (PC) merupakan beban listrik dengan kandungan harmonisa tertinggi yaitu sebesar 81,1 % dan 72,2 %. Dengan memperkecil nilai kandungan arus harmonisa yang disebabkan oleh beban non-linier maka akan menyebabkan nilai THDi menjadi lebih kecil sehingga rugi-rugi pemakaian energi listrik dapat dihindari. Keywords- harmonisa, THDi, rugi-rugi

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