مکان‌یابی خطا در شبکه‌های توزیع با استفاده از ترکیب روش امپدانسی و فرورفتگی ولتاژ
محورهای موضوعی : مهندسی برق و کامپیوتر
محمد دیسی
1
(دانشگاه خلیج فارس)
رحمن دشتی
2
(دانشگاه خلیج فارس)
کلید واژه: بارزدايي ولتاژي باس مؤثر توان راکتيو حساسيت ولتاژ پایداری ولتاژ,
چکیده مقاله :
شبکه‌های توزیع در تمام سطوح شهرها و روستاها گسترده شده‌اند و این شبکه‌ها دارای انشعاب‌ها، زیرانشعاب‌ها و بارهای زیرخط می‌باشند. مکان‌یابی دقیق خطا در سیستم‌های توزیع باعث بهبود شاخص‌های قابلیت اطمینان و بازده آنها می‌شود. در این مقاله یک روش ترکیبی جدید برای مکان‌یابی خطای تک‌فاز، دوفاز و سه‌فاز به زمین در شبکه‌های توزیع پیشنهاد می‌گردد. همچنین از یک الگوریتم مکان‌یاب امپدانسی خطا برای پیداکردن محل‌های ممکن خطا استفاده می‌شود. سپس از روش پیشنهادی با استفاده از الگوریتم تطابق فرورفتگی ولتاژ برای تعیین بخش دارای خطا استفاده می‌شود. در این روش پس از وقوع خطا، محل‌های ممکن خطا با استفاده از الگوریتم امپدانسی تعیین می‌شوند. سپس خطاهای مشابهی به طور جداگانه در محل‌های ممکن تعیین‌شده، شبیه‌سازی می‌شوند. در ادامه ولتاژ ابتدای فیدر ذخیره می‌شود و آن گاه دامنه و فاز اختلاف ولتاژها تعیین و بانک داده آنلاین تولید می‌گردد. برای تشخیص خطای حقیقی، داده‌های این بانک با دامنه و زاویه اختلاف ولتاژهای به دست آمده و ثبت‌شده (در ابتدای فیدر) مقایسه می‌شوند. محل واقعی خطا با مقدار تطبیق هر محل خطای ممکن تعیین می‌شود.
Load taps, laterals, and sub laterals are different branches of power distribution (PD) networks. In PD systems, reliability indices and their efficiency are improved using an accurate method in fault locating. In this paper, a new combined method for locating single, double and three phase faults to ground is proposed in PD networks. In this article, for finding the possible fault locations, an impedance based fault-location algorithm is used. Then, for determining the faulty section, the new method is proposed using voltage sag matching algorithm. In this method, the possible fault locations are determined, after occurrence of single and double phase faults to ground, using an algorithm which is impedance based fault-location algorithm. Separately, the same fault is simulated in possible locations. Then, at the beginning of a feeder, the voltage is saved and the amplitude and angle of the voltage differences are determined and accordingly, an online data bank is generated. Then, the obtained and recorded amplitude and angle of the voltage differences (at the beginning of the feeder) is compared with that data bank, for the actual fault. By the matching value of each possible fault location, the real location of fault is determined. Compared to the other counterparts, the proposed method is more accurate in locating faults and less sensitive to the fault resistance.
[1] J. Sadeh, E. Bakhshizadeh, and R. Kazemzadeh, "A new fault location algorithm for radial distribution systems using modal analysis," International J. of Electrical Power & Energy Systems, vol. 45, no. l, pp. 271-278, Feb. 2013.
[2] H. Mokhlis and H. Li, "Non-linear representation of voltage sag profiles for fault location in distribution networks," International J. of Electrical Power & Energy Systems, vol. 33, no. 3, pp. 124-130, Jan. 2011.
[3] H. Mokhlis, A. R. Khalid, and H. Y. Li, "Voltage sags pattern recognition technique for fault section identification in distribution networks," inProc. IEEE PowerTech, 6 pp., Bucharest, Romania, Oct. 2009.
[4] R. Dashti and J. Sadeh, "Accuracy improvement of impedance-based fault location method for power distribution network using distributed-parameter line model," International Trans. on Electrical Energy Systems, vol. 24, no. 3, pp. 318-334, Mar. 2014.
[5] R. Dashti and J. Sadeh, "Applying dynamic load estimation and distributed-parameter line model to enhance the accuracy of impedance-based fault-location methods for power distribution networks," Electric Power Components and Systems J., vol. 14, no. 1, pp. 1334-1362, Sept. 2013.
[6] R. Dashti and J. Sadeh, "Fault section estimation in power distribution network using impedance-based fault distance calculation and frequency spectrum analysis," IET J., Generation, Transmission and Distribution, vol. 8, no. 8, pp. 1406-1417, Aug. 2014.
[7] R. H. Salim, M. Resener, A. E. D. O. Filomena, K. R. C. de Oliveira, and A. S. Bretas, "Extended fault-location formulation for power distribution Systems," IEEE Trans. on Power Delivery, vol. 24, no. 2, pp. 508-516, Mar. 2009.
[8] A. D. Filomena, M. Resener Author Vitae, R. H. Salim Author Vitae, and A. S. Bretas, "Distribution systems fault analysis considering fault resistance estimation," International J. of Electrical Power & Energy Systems, vol. 33, no. 7, pp. 1326-1335, Sept. 2011.
[9] R. H. Salim, K. C. O. Salim, and A. S. Bretas, "Further improvements on impedance-based fault location for power distribution systems," IET Generation, Transmission & Distribution, vol. 5, no. 4, pp. 467-478, Apr. 2011.
[10] H. Nouri and M. M. Alamutil, "Comprehensive distribution network fault location using the distributed parameter model," IEEE Trans. on Power Delivery, vol. 26, no. 4, pp. 2154-2162, Aug. 2011.
[11] R. Krishnathevar and E. E. Ngu, "Generalized impedance-based fault location for distribution systems," IEEE Trans. on Power Delivery, vol. 27, no. 1, pp. 449-452, Jan. 2012.
[12] S. Das, N. Karnik, and S. Santoso, "Distribution fault-locating algorithms using current only," IEEE Trans. on Power Delivery, vol. 27, no. 3, pp. 1144-1153, Jul. 2012.
[13] Y. Liao, "Generalized fault-location methods for overhead electric distribution systems," IEEE Trans. on Power Delivery, vol. 26, no. 1, pp. 53-64, Jan. 2011.
[14] R. A. F. Pereira, L. G. W. da Silva, M. Kezunovic, and J. E. R. S. Mantovani, "Improved fault location on distribution feeders based on matching during-fault voltage sags," IEEE Trans. on Power Delivery, vol. 24, no. 2, pp. 852-862, Apr. 2009.
[15] W. H. Kersting, "Radial distribution test feeders," in Proc IEEE Power Engineering Society Winter Meeting, pp. 908-912, Aug. 2011.
[16] M. M. Saha, J. Izykowski, and E. Rosolowski, Fault Location on Power Network, Springer-Verlag: London, England, 2010.
[17] S. J. Lee, et al., "An intelligent and efficient fault location and diagnosis scheme for radial distribution systems," IEEE Trans. on Power Delivery, vol. 19, no. 2, pp. 524-532, Apr. 2004.
[18] A. Borghetti and M. Boseti, "Continuous-wavelet transform for fault location in distribution power networks: definition of mother wavelets inferred from fault originated transients," IEEE Trans. on Power Syst, vol. 23, no. 2, pp. 380-388, May 2008.
[19] M. S. Choi, S. J. Lee, D. S. Lee, and B. G. Jin, "A new fault location algorithm using direct circuit analysis for distribution systems," IEEE Trans. on Power Delivery, vol. 19, no. 1, pp. 35-41, Jan. 2004.