روش حفاظت هماهنگ بر مبنای کنترل امپدانس مجازی برای ریزشبکه‌های حلقوی
محورهای موضوعی : انرژی های تجدیدپذیر
حامد کریمی
1
(دانشکده مهندسی برق- واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران)
بهادر فانی
2
(دانشکده مهندسی برق- واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران)
غضنفر شاهقلیان
3
(مرکز تحقیقات ریز شبکه های هوشمند- واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران)
کلید واژه: منابع تولید پراکنده, ریزشبکه حلقوی, هماهنگی حفاظتی, رله اضافه جریان,
چکیده مقاله :
حضور منابع تولید پراکنده اینورتری در سیستم‌های قدرت در مقابل مزایای متعدد آن، می‌تواند باعث ایجاد عدم هماهنگی در عملکرد سیستم حفاظتی گردد. در این مقاله یک راه کار مناسب، مستقل از تنظیمات رله‌ها، به منظور حل مشکلات حفاظتی ریزشبکه‌های جزیره‌ای اینورتری با آرایش حلقوی ارائه گردیده است. حضور منابع تولید پراکنده اینورتری، تغییر جهت و دامنه‌ی جریان خطا در سطح ریزشبکه را موجب می‌شود. این مساله در ریزشبکه‌ها با آرایش حلقوی بیشتر به چشم می‌خورد. بنابراین طرح‌های حفاظتی متداول که یک مسیر واحد و یک سطح جریان خطای بالا را در مقایسه با جریان بار در نظر می‌گیرند، ممکن است دچار مشکل شوند. یک عامل مهم برای طراحی مناسب یک سیستم حفاظتی برای ریزشبکه‌ها، سهم جریان خطای تزریقی منابع اینورتری است. در این مقاله استراتژی حفاظت بر مبنای کنترل اینورتر منابع ارائه می‌گردد و از رله‌های اضافه جریان معمولی با منحنی مشخصه‌ی یکسان استفاده شده است. هنگامی که یک خطای اتصال کوتاه در ریزشبکه رخ دهد، یک استراتژی محدود کننده جریان وفقی با استفاده از حلقه امپدانس مجازی اعمال می-گردد. در این حالت سهم جریان خطای هر منبع با توجه به موقعیت خطا کنترل می‌شود و منابع نزدیکتر به خطا جریان خطای بزرگتری تولید می‌کنند. بنابراین جریان عبوری از تجهیزات حفاظتی نزدیکتر به خطا بیشتر از سایر تجهیزات موجود در ریزشبکه می‌شود و بدون نیاز به برقراری ارتباط بین تجهیزات حفاظتی هماهنگی حفاظتی تضمین می‌شود.
The presence of the inverter distributed generations in the power systems can bring about incoordination in the protection system performance while enjoying various advantages. In this paper, a suitable solution, independent of relay settings, is presented in order to solve the protection problems of inverter island microgrids with circular arrangement. The presence of distributed inverter generation sources causes a change in the direction and amplitude of the fault current at the microgrid level. This problem is more visible in microgrids with circular arrangement. Therefore, conventional protection schemes that consider a single path and a high fault current level compared to load current may be problematic. An important factor for the proper design of a protective system for microgrids is the contribution of the injecting fault current of the inverter sources. In this paper, a protection strategy based on the inverter control of sources is presented and ordinary overcurrent relays with the same characteristic curve are used. When a short circuit fault occurs in the microgrid, an adaptive current limiting strategy is applied using the virtual impedance loop. In this case, the share of fault current of each source is controlled according to the position of the fault, and sources closer to the fault produce a larger fault current. Therefore, the current passing through the protective equipment is closer to the fault than other equipment in the micro grid. And without the need for making connection between protective equipment, the protective coordination is guaranteed.
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_||_[1] M. Salari, F. Haghighatdar-Fesharaki, “Optimal placement and sizing of distributed generations and capacitors for reliability improvement and power loss minimization in distribution networks”, Journal of Intelligent Procedures in Electrical Technology, vol. 11, no. 43, pp. 83-94, Autumn 2020..
[2] G. Shahgholian, Z. Azimi, "Analysis and design of a DSTATCOM based on sliding mode control strategy for improvement of voltage sag in distribution systems", Electronics, vol. 5, no. 3, pp. 1-12, 2016 (doi: 10.3390/electronIcs 5030041).
[3] W. Huang, N. Zhang, J. Yang, Y. Wang, C. Kang, "Optimal configuration planning of multi-energy systems considering distributed renewable energy", IEEE Trans. on Smart Grid, vol. 10, no. 2, pp. 1452-1464, March 2019 (doi: 10.1109/TSG.2017.2767860).
[4] G. Shahgholian, "Analysis and simulation of dynamic performance for DFIG-based wind farm connected to a distrubition system", Energy Equipment and Systems, vol. 6, no. 2, pp. 117-130, June 2018 (doi: 10.22059/EES.2018. 315 31).
[5] S. Yang, P. Wang, Y. Tang, L. Zhang, "Explicit phase lead filter design in repetitive control for voltage harmonic mitigation of VSI-based islanded microgrids", IEEE Trans. on Industrial Electronics, vol. 64, no. 1, pp. 817-826, Jan. 2017 (doi: 10.1109/TIE.2016.2570199).
[6] J. Faiz, G. Shahgholian, M. Ehsan, “Stability analysis and simulation of a single‐phase voltage source UPS inverter with two‐stage cascade output filter”, European Transactions on Electrical Power, vol. 18, no. 1, pp. 29-49, Jan. 2008 (doi: 10.1002/etep.160).
[7] R. Kolluri, I. Mareels, T. Alpcan, M. Brazil, J. Hoog, D. Thomas, “Power sharing in angle droop controlled microgrids”, IEEE Trans. on Power Systems, vol. 32, no. 6, pp. 4743-4751, Nov. 2017 (doi: 10.1109/TPWRS.2017.2672569).
[8] B. Keyvani-Boroujeni, G. Shahgholian, B. Fani, "A distributed secondary control approach for inverter-dominated microgrids with application to avoiding bifurcation-triggered instabilities", IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 8, no. 4, pp. 3361-3371, Dec. 2020 (doi: 10.1109/JESTPE.2020.2974756).
[9] B. Fani, M. Dadkhah, A. Karami, “Adaptive protection coordination scheme against the staircase fault current waveforms in PV-dominated distribution systems”, IET Generation, Transmission and Distribution, vol.12, no. 9, May 2018 (doi: 10.1049/iet-gtd.2017.0586).
[10] B. Khajeh-Shalaly, G. Shahgholian, “A multi-slope sliding-mode control approach for single-phase inverters under different loads”, Electronics, vol. 5, no. 4, Oct. 2016 (doi: 10.3390/electronics5040068).
[11] S. D. Kermany, M. Joorabian, S. Deilami, M. A. S. Masoum, "Hybrid islanding detection in microgrid with multiple connection points to smart grids using fuzzy-neural network", IEEE Trans. on Power Systems, vol. 32, no. 4, pp. 2640-2651, July 2017 (doi: 10.1109/TPWRS.2016.2617344).
[12] H. Pan, Q. Teng, D. Wu, "MESO-based robustness voltage sliding mode control for AC islanded microgrid", Chinese Journal of Electrical Engineering, vol. 6, no. 2, pp. 83-93, June 2020 (doi: 10.23919/CJEE.2020.000013).
[13] D. E. Olivares, A. Mehrizi-Sani, A. H. Etemadi, C. A. Canizares, R. Iravani, M. Kazerani, A. H. Hajimiragha, O. Gomis-Bellmunt, M. Saeedifard, R. Palma-Behnke, G. A. Jiménez-Estévez, N. D. Hatziargyriou, “Trends in microgrid control”, IEEE Trans. on Smart Grid, vol. 5, no. 4, pp. 1905-1919, July 2014 (doi: 10.1109/TSG.2013.2295514).
[14] S. Zamanian, S. Sadi, R. Ghaffarpour, A. Mahdavian, “Inverter-based microgrid dynamic stability analysis considering inventory of dynamic and static load models”, Journal of Intelligent Procedures in Electrical Technology, vol. 11, no. 44, pp. 91-109, Winter 2021 (in Persian).
[15] Y. C. C. Wong, C. S. Lim, M. D. Rotaru, A. Cruden, X. Kong, "Consensus virtual output impedance control based on the novel droop equivalent impedance concept for a multi-bus radial microgrid", IEEE Trans. on Energy Conversion, vol. 35, no. 2, pp. 1078-1087, June 2020 (doi: 10.1109/TEC.2020.2972002).
[16] L. Che, X. Zhang, M. Shahidehpour, A. Alabdulwahab, Y. Al-Turki, "Optimal planning of loop-based microgrid topology", IEEE Trans. on Smart Grid, vol. 8, no. 4, pp. 1771-1781, July 2017 (doi: 10.1109/TSG.2015.2508058).
[17] L. Xindong, M. Shahidehpour, “Protection scheme for loop-based microgrid”, IEEE Trans. on Smart Grid, vol. 8, no. 3, pp. 1340-1349, May 2017 (doi: 10.1109/TSG.2016.2626791).
[18] S. Gorji, S. Zamanian, M. Moazzami, “Techno-economic and environmental base approach for optimal energy management of microgrids using crow search algorithm”, Journal of Intelligent Procedures in Electrical Technology, vol. 11, no. 43, pp. 49-68, Autumn 2020 (in Persian).
[19] F. Mumtaz, I. S. Bayram, “Planning, operation, and protection of microgrids: An overview”, Energy Procedia, vol. 107, pp. 94-100, Feb. 2017 (doi: 10.1016/j.egypro.2016.12.137).
[20] P. T. Manditereza, R. C. Bansal, “Protection of microgrids using voltage-based power differential and sensitivity analysis”, International Journal of Electrical Power and Energy Systems, vol. 118, Article Number: 105756, June 2020 (doi: 10.1016/j.ijepes.2019.105756).
[21] M. A. Redfern, H. Al-Nasseri, “Protection of micro-grids dominated by distributed generation using solid state converters”, Proceeding of the IEEE/DPSP, pp. 670–674, Glasgow, UK, Mar. 2008 (doi: 10.1049/cp:20080119).
[22] N. Villamagna, P. A. Crossley, "A CT saturation detection algorithm using symmetrical components for current differential protection", IEEE Trans. on Power Delivery, vol. 21, no. 1, pp. 38-45, Jan. 2006 (doi: 10.1109/TPWRD.2005.848654).
[23] P. A. Venikar, M. S. Ballal, B. S. Umre, H. M. Suryawanshi, "Symmetrical components based advanced scheme for detection of incipient inter-turn fault in transformer", Proceeding of the IEEE/CATCON, pp. 127-132, Bangalore, India, Dec. 2015 (doi: 10.1109/CATCON.2015.7449521).
[24] H. Nikkhajoei, R. H. Lasseter, “Microgrid fault protection based on symmetrical and differential current components”, Public Interest Energy Research, California Energy Commission, Dec. 2006.
[25] S. Kar, S.R. Samantaray, “Time-frequency transform-based differential scheme for microgrid protection”, IET Generation, Transmission and Distribution, vol. 8, no. 2, pp. 310-320, Feb. 2014 (doi: 10.1049/iet-gtd.2013.0180).
[26] S. R. Samantaray, G. Joos, I. Kamwa, “Differential energy based microgrid protection against fault conditions”, Proceeding of the IEEE/ ISGT, Washington, DC, USA, Jan. 2012 (doi: 10.1109/ISGT.2012.6175532).
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