Research the Method Estimation of Fast and Accurate Sag Voltage
Main Article Content
Abstract
Sag voltage affects the quality of the grid voltage and the working conditions of the electrical equipment. In order to prevent effective this problem, the authors researched the method estimation of fast and accurate voltage and phase angle in the presence of sag voltage. The method proposed Least Error Squares (LES) were constructed on the basis of the least squares algorithm and Taylor series expansion. Compared with conventional Clark and Park methods, the LES approach has the following major advantages: faster detection time, reduced deviation of estimated voltage values at the time of failure; faster detection time, reduced deviation of estimated voltage values at the time of failure; Not affected by other fundamental components 50Hz, the DC components in the grid. The effectiveness of the method is verified by simulation model of a distribution grid in Vinh Phuc province by Matlab / SIMULINK software
Keywords
Sag voltage, Least Error Squares, DVR
Article Details
References
[1] Gabriele D’Antona, The Full Least-Squares Method, in IEEE Trans. Inst. Mea, vol. 52, no. 1, February 2003. https://doi.org/10.1109/TIM.2003.809489
[2] M.S. Sachdev, FIEE M.M. Giray, A Least error squares technique for determining power system frequency, IEEE Trans. Pow. Appa. Sys, Vol. PAS-98, No.6 Nov./Dec. 1979
[3] M.S. Sachdev, Senior Member, M.A. Baribeau, A new algorithm for digital impedance relays, IEEE Trans. Pow. Appa. Sys, Vol. PAS-98, No.6 Nov./Dec. 1979 https://doi.org/10.1109/TPAS.1979.319422
[4] Guo, Hengdao, Frequency tracking and phasor estimation using least squares and total least squares algorithms (2014). Theses and Dissertations-Electrical and Computer Engineering. Paper 57. https://doi.org/10.1007/978-94-017-3552-0_6
[5] P. Harichandana, M. Tech Scholar, Madhavi Sunkara, M. Tech, Improvement of DVR performance using fast and effective control scheme under various loads, ISSN: 2248-9622, Vol. 3, Issue 5, Sep-Oct 2013, pp.1807-1813
[6] Control and testing of a Dynamic Voltage Restorer (DVR) at medium voltage level, IEEE Trans. Pow. Appa. Sys, Vol. 19, no. 3, May 2004.
[2] M.S. Sachdev, FIEE M.M. Giray, A Least error squares technique for determining power system frequency, IEEE Trans. Pow. Appa. Sys, Vol. PAS-98, No.6 Nov./Dec. 1979
[3] M.S. Sachdev, Senior Member, M.A. Baribeau, A new algorithm for digital impedance relays, IEEE Trans. Pow. Appa. Sys, Vol. PAS-98, No.6 Nov./Dec. 1979 https://doi.org/10.1109/TPAS.1979.319422
[4] Guo, Hengdao, Frequency tracking and phasor estimation using least squares and total least squares algorithms (2014). Theses and Dissertations-Electrical and Computer Engineering. Paper 57. https://doi.org/10.1007/978-94-017-3552-0_6
[5] P. Harichandana, M. Tech Scholar, Madhavi Sunkara, M. Tech, Improvement of DVR performance using fast and effective control scheme under various loads, ISSN: 2248-9622, Vol. 3, Issue 5, Sep-Oct 2013, pp.1807-1813
[6] Control and testing of a Dynamic Voltage Restorer (DVR) at medium voltage level, IEEE Trans. Pow. Appa. Sys, Vol. 19, no. 3, May 2004.