Digital measurement of transient disturbances in electric power network with additional lowpass analog circuit

• Autorzy: Duda K. , Bień A.
• Języki publikacji: EN

Abstrakty

EN

The paper presents a DSP-based system for measurement of the short-term transient distortions in electric power networks. These distortions typically possess short duration times and high amplitude values and thus they are very di.cult to acquire by standard digital data acquisition systems. We propose to apply an additional analog lowpass RC circuit before digital data acquisition. A properly chosen analog RC filter extends the duration time of transient distortion and simultaneously reduces its amplitude making it significantly simpler to acquire digitally. Next, digital signal processing is used for cancelling the analog convolution of the acquired signal with a RC filter. The paper discuses results obtained for di.erent con.gurations of the proposed measurement system including RC filter selection and digital deconvolution filter design. The algorithm was implemented in a Texas Instruments C617 DSK toolkit. Laboratory experiments with voltage signals are presented in the paper.

Słowa kluczowe

EN

transient distortion measurement; DSP system; power quality monitoring

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2007
• Tom: Vol. 14, nr 2
• Strony: 283--289
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Duda K.

autor

Bień A.

• AGH University of Science and Technology, Measurement & Instrumentation Department, Krakow, Poland,

Bibliografia

• 1. Signal Processing Toolbox For Use with MATLAB. User’s Guide Version 6, www.mathworks.com
• 2. Duda K., Bień A.: Real-time detection of transient disturbances in electric power network, 14th IMEKO TC4 Symposium on New Technologies in Measurement and Instrumentation and 10th Workshop on ADC Modelling and Testing, Jurata – Gdynia, Poland.
• 3. Duda K., Bień A.: Design of a recorder of quick-changing disturbances in a power network. XVth Symposium of Measurement Systems Modeling and Simulation, September 18-22nd, Krynica (in Polish).
• 4. Duda K., Bień A.: Digital measurement of pulse disturbances in a power network using analog integration – experimental investigation. XVIth MiSSP Symposium 2006 (in Polish).
• 5. Ptasiński L. Żegleń T.: Ignition investigation of methane-air mixtures by multiple capacitor discharges, 9th international conference on Electrostatics, Electrostatics 2001, Zakopane, 29.V.2001.
• 6. Zieliński T.: From theory to digital signal processing. WKŁ , Warsaw 2005 (in Polish).
• 7. Leonardo Power Quality Initiative, www.lpqi.org