PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

The annual increase of the global load demand has led to higher penetration of inverter-based renewable energy resources like wind farms and solar PV into the modern grid system. Distance relay may mal-operate by incorrectly estimating line impedance as fault during swing scenarios considering the infeed contributions impact from renewable sources. The negative impact of these integrated power electronics-based devices on the power swing blocking (PSB) and out-of-steps tripping (OST) functions of the distance relay characteristics has not been extensively discussed in previous studies. This study divulges a comprehensive review of the various PSB and OST schemes studies conducted to prevent relay mal-operation during power swing (PS) and symmetrical faults. Also, the large-scale renewable resources penetrations impact the PS characteristic and trip decision operation of the distance relay divulged. The mining of distance relay event records for hidden useful knowledge deployment for intelligent PSB and OST functions is the future research direction. Using the distance relay divulged knowledge will assist in reducing the failure rate level of PSB and OST function distance relaying schemes, hence improving the degree of reliability/dependability of the power system under different operating conditions.

• Abbasi, M. J., & Yaghobi, H. (2017). A new combined method to diagnosis loss of excitation from stable power swing in doubly fed induction generator. Journal of Modeling in Engineering, 15(51), 159-169. https://doi.org/10.22075/jme.2017.2684

• Abdin, E. S., & Xu, W. (2000). Control design and dynamic performance analysis of a wind turbine-induction generator unit. IEEE Transactions on Energy Conversion, 15(1), 91-96. https://doi.org/10.1109/60.849122

• Ahmed, S. D., Al-Ismail, F. S. M., Shafiullah, M., Al-Sulaiman, F. A., & El-Amin, I. M. (2020). Grid integration challenges of wind energy: A review. IEEE Access, 8, 10857-10878. https://doi.org/10.1109/ACCESS.2020.2964896

• Alsyoufi, Y. R., & Hajjar, A. A. (2019). A high-speed algorithm to discriminate between power swing and faults in distance relays based on a fast wavelet. Electric Power Systems Research, 172, 269-276. https://doi.org/10.1016/j.epsr.2019.03.021

• Arumuga, M., & Reddy, M. J. B. (2022). Distance protection methodology for detection of faulted phase and fault along with power swing using apparent impedance. IEEE Access, 10, 43583-43597. https://doi.org/10.1109/ACCESS.2022.3168563

• Bakar, A. H. A., Yatim, F. M., Yusof, S., & Othman, M. R. (2010). Analysis of overload conditions in distance relay under severe system contingencies. International Journal of Electrical Power & Energy Systems, 32(5), 345-350. https://doi.org/10.1016/j.ijepes.2009.11.023

• Benjamin, A., & Jain, S. K. (2018). A review of literature on effects of harmonics on protective relays. In 2018 IEEE Innovative Smart Grid Technologies-Asia (ISGT Asia) (pp. 407-412). IEEE Publishing. https://doi.org/10.1109/ISGT-Asia.2018.8467876

• Bowen, Z., Qiyu, C., & Dongsheng, Y. (2018). On the power system large-scale blackout in Brazil. Power Generation Technology, 39(2), 97-105. https://doi.org/10.12096/j.2096-4528.pgt.2018.016

• Brahma, S. M. (2007). Distance relay with out-of-step blocking function using wavelet transform. IEEE Transactions on Power Delivery, 22(3), 1360-1366. https://doi.org/10.1109/TPWRD.2006.886773

• Buraimoh, E., & Davidson, I. E. (2020). Overview of fault ride-through requirements for photovoltaic grid integration, design and grid code compliance. In 2020 9th International Conference on Renewable Energy Research and Application (ICRERA) (pp. 332-336). IEEE Publishing. https://doi.org/10.1109/ICRERA49962.2020.9242914

• Cabrera-Tobar, A., Bullich-Massagué, E., Aragüés-Peñalba, M., & Gomis-Bellmunt, O. (2019). Active and reactive power control of a PV generator for grid code compliance. Energies, 12(20), Article 3872. https://doi.org/10.3390/en12203872

• Camarillo-Peñaranda, J. R., Celeita, D., Gutierrez, M., Toro, M., & Ramos, G. (2020). An approach for out-of-step protection based on swing center voltage estimation and analytic geometry parameters. IEEE Transactions on Industry Applications, 56(3), 2402-2408. https://doi.org/10.1109/TIA.2020.2973590

• Choudhury, S. (2020). A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology. International Transactions on Electrical Energy Systems, 30(9), Article e12446. https://doi.org/10.1002/2050-7038.12446

• Chowdhury, M. A., Hosseinzadeh, N., Shen, W. X., & Pota, H. R. (2013). Comparative study on fault responses of synchronous generators and wind turbine generators using transient stability index based on transient energy function. International Journal of Electrical Power & Energy Systems, 51, 145-152. https://doi.org/10.1016/j.ijepes.2013.02.025

• Chung, P. D. (2013). Comparison of steady-state characteristics between DFIG and SCIG in wind turbine. International Journal of Advanced Science and Technology, 51, 135-146.

• Corsi, S., & Sabelli, C. (2004). General blackout in Italy sunday september 28, 2003, h. 03: 28: 00. In IEEE Power Engineering Society General Meeting, 2004 (pp. 1691-1702). IEEE Publishing. https://doi.org/10.1109/PES.2004.1373162

• Desai, J., & Makwana, V. (2021). Power swing blocking algorithm based on real and reactive power transient stability. Electric Power Components and Systems, 48(16-17), 1673-1683. https://doi.org/10.1080/15325008.2021.1906794

• Desai, J. P., & Makwana, V. H. (2022). Modeling and implementation of power swing detection and out-of-step protection. Journal of The Institution of Engineers (India): Series B, 103, 541-548. https://doi.org/10.1007/s40031-021-00679-2

• Dreidy, M., Mokhlis, H., & Mekhilef, S. (2017). Inertia response and frequency control techniques for renewable energy sources: A review. Renewable and Sustainable Energy Reviews, 69, 144-155. https://doi.org/10.1016/j.rser.2016.11.170

• Dubey, R., Samantaray, S. R., Panigrahi, B. K., & Venkoparao, V. G. (2016). Data-mining model based adaptive protection scheme to enhance distance relay performance during power swing. International Journal of Electrical Power & Energy Systems, 81, 361-370. https://doi.org/10.1016/j.ijepes.2016.02.014

• Elliott, R. J. R., Nguyen-Tien, V., & Strobl, E. A. (2021). Power outages and firm performance: A hydro-IV approach for a single electricity grid. Energy Economics, 103, Article 105571. https://doi.org/10.1016/j.eneco.2021.105571

• Emmanue, O., Othman, M. L., Hizam, H., Othman, M. M., Aker, E., Chidiebere, A. O., & Samuel, T. N. (2019). Hybrid signal processing and machine learning algorithm for adaptive fault classification of wind farm integrated transmission line protection. International Journal of Integrated Engineering, 11(4), 91-100. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4562

• Emmanuel, O., Othman, M. L., Hizam, H., & Othman, M. M. (2020). Single line-to-ground fault special protection scheme for integrated windfarm transmission line using data mining. In 2020 2nd International Conference on Smart Power & Internet Energy Systems (SPIES) (pp. 76-81). IEEE Publishing. https://doi.org/10.1109/SPIES48661.2020.9242959

• Folly, K., & Sheetekela, S. (2009). Impact of fixed and variable speed wind generators on the transient stability of a power system network. In 2009 IEEE/PES Power Systems Conference and Exposition (pp. 1-7). IEEE Publishing. https://doi.org/10.1109/PSCE.2009.4840178

• Gao, Z. D., & Wang, G. B. (1991). A new power swing block in distance protection based on a microcomputer-principle and performance analysis. In 1991 International Conference on Advances in Power System Control, Operation and Management, APSCOM-91 (Vol. 2, pp. 843-847). IET.

• Gautam, D., Vittal, V., & Harbour, T. (2009). Impact of increased penetration of DFIG-based wind turbine generators on transient and small signal stability of power systems. IEEE Transactions on Power Systems, 24(3), 1426-1434. https://doi.org/10.1109/TPWRS.2009.2021234

• Gonzalez-Longatt, F., Adiyabazar, C., & Martinez, E. V. (2021). Setting and testing of the out-of-step protection at mongolian transmission system. Energies, 14(23), Article 8170. https://doi.org/10.3390/en14238170

• Gunasegaran, M. K., Tan, C., Bakar, A. H. A., Mokhlis, H., & Illias, H. A. (2015). Progress on power swing blocking schemes and the impact of renewable energy on power swing characteristics: A review. Renewable and Sustainable Energy Reviews, 52, 280-288. https://doi.org/10.1016/j.rser.2015.07.066

• Haddadi, A., Farantatos, E., Kocar, I., & Karaagac, U. (2021). Impact of inverter based resources on system protection. Energies, 14(4), Article 1050. https://doi.org/10.3390/en14041050

• Haddadi, A., Kocar, I., Karaagac, U., Gras, H., & Farantatos, E. (2019). Impact of wind generation on power swing protection. IEEE Transactions on Power Delivery, 34(3), 1118-1128. https://doi.org/10.1109/TPWRD.2019.2896135

• Hashemi, S. M., & Sanaye-Pasand, M. (2018). Distance protection during asymmetrical power swings: challenges and solutions. IEEE Transactions on Power Delivery, 33(6), 2736-2745. https://doi.org/10.1109/TPWRD.2018.2816304

• He, H., Chen, L., Yin, T., Cao, Z., Yang, J., Tu, X., & Ren, L. (2016). Application of a SFCL for fault ride-through capability enhancement of DG in a microgrid system and relay protection coordination. IEEE Transactions on Applied Superconductivity, 26(7), 1-8. https://doi.org/10.1109/TASC.2016.2599898

• Holbach, J. (2006). New out of step blocking algorithm for detecting fast power swing frequencies. In 2006 Power Systems Conference: Advanced Metering, Protection, Control, Communication, and Distributed Resources (pp. 182-199). IEEE Publishing. https://doi.org/10.1109/PSAMP.2006.285388

• Jedrzejczak, J., Anders, G. J., Fotuhi-Firuzabad, M., Farzin, H., & Aminifar, F. (2016). Reliability assessment of protective relays in harmonic-polluted power systems. IEEE Transactions on Power Delivery, 32(1), 556-564. https://doi.org/10.1109/TPWRD.2016.2544801

• Jia, K., Gu, C., Xuan, Z., Li, L., & Lin, Y. (2017). Fault characteristics analysis and line protection design within a large-scale photovoltaic power plant. IEEE Transactions on Smart Grid, 9(5), 4099-4108. https://doi.org/10.1109/TSG.2017.2648879

• Kang, D., & Gokaraju, R. (2016). A new method for blocking third-zone distance relays during stable power swings. IEEE Transactions on Power Delivery, 31(4), 1836-1843. https://doi.org/10.1109/PESGM.2017.8273837

• Khadka, N., Paudel, R., Adhikary, B., Bista, A., Sharma, S., & Shrestha, A. (2020). Transient stability in renewable energy penetrated power systems: A review. Proceedings of the RESSD 2020 International Conference on Role of Energy for Sustainable Social Development in ‘New Normal’Era, Kathmandu, Nepal. IEEE PES Nepal Chapter.

• Khodaparast, J., & Khederzadeh, M. (2014). Three-phase fault detection during power swing by transient monitor. IEEE Transactions on Power Systems, 30(5), 2558-2565. https://doi.org/10.1109/TPWRS.2014.2365511

• Khoradshadi-Zadeh, H. (2005). Evaluation and performance comparison of power swing detection algorithms. In IEEE Power Engineering Society General Meeting, 2005 (Vol. 2, pp. 1842-1848). https://doi.org/10.1109/PES.2005.1489280

• Lawan, M. M. G., Raharijaona, J., Camara, M. B., & Dakyo, B. (2017). Power control for decentralized energy production system based on the renewable energies—using battery to compensate the wind/load/PV power fluctuations. In 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA) (pp. 1132-1138). IEEE Publishing. https://doi.org/10.1109/ICRERA.2017.8191230

• Lazaro, C., Marques, J. P., Marchesan, G., & Cardoso, G. (2018). Waveform asymmetry of instantaneous current signal based symmetrical fault detection during power swing. Electric Power Systems Research, 155, 340-349. https://doi.org/10.1016/j.epsr.2017.11.005

• Liang, Y., Li, W., & Zha, W. (2020). Adaptive mho characteristic-based distance protection for lines emanating from photovoltaic power plants under unbalanced faults. IEEE Systems Journal, 15(3), 3506-3516. https://doi.org/10.1109/JSYST.2020.3015225

• Liu, S., Bi, T., & Liu, Y. (2017). Theoretical analysis on the short-circuit current of inverter-interfaced renewable energy generators with fault-ride-through capability. Sustainability, 10(1), Article 44. https://doi.org/10.3390/su10010044

• Mahamedi, B. (2010). A very fast unblocking scheme for distance protection to detect symmetrical faults during power swings. In 2010 Conference Proceedings IPEC. IEEE Publishing. https://doi.org/10.1109/IPECON.2010.5697162

• Mararakanye, N., & Bekker, B. (2019). Renewable energy integration impacts within the context of generator type, penetration level and grid characteristics. Renewable and Sustainable Energy Reviews, 108, 441-451. https://doi.org/10.1016/j.rser.2019.03.045

• Mathe, R., & Folly, K. (2017). Impact of large scale grid-connected wind generators on the power system network. In 2017 IEEE PES PowerAfrica (pp. 328-333). IEEE Publishing. https://doi.org/10.1109/PowerAfrica.2017.7991246

• Mishra, P., Pradhan, A. K., & Bajpai, P. (2020). Adaptive distance relaying for distribution lines connecting inverter-interfaced solar PV plant. IEEE Transactions on Industrial Electronics, 68(3), 2300-2309. https://doi.org/10.1109/TIE.2020.2975462

• Mohapatra, S., Mohanty, S. K., & Patel, T. K. (2017). Out-of-step technique based symmetrical fault analysis. In 2017 Innovations in Power and Advanced Computing Technologies (i-PACT) (pp. 1-5). IEEE Publishing. https://doi.org/10.1109/IPACT.2017.8244912

• Mondal, A., Das, S., & Patel, B. (2020). Fault detection during power swing using fast discrete S-transform. In K. Maharatna, M. R. Kanjilal, S. C. Konar, S. Nandi, & K. Das (Eds.), Lecture notes in electrical engineering: Vol. 575. Computational Advancement in Communication Circuits and Systems (pp. 73-79). Springer. https://doi.org/10.1007/978-981-13-8687-9_7

• Mooney, P. E. J., & Fischer, N. (2006). Application guidelines for power swing detection on transmission systems. In 2006 Power Systems Conference: Advanced Metering, Protection, Control, Communication, and Distributed Resources (pp. 159-168). https://doi.org/10.1109/PSAMP.2006.285385

• Morais, A. P., Júnior, G. C., Mariotto, L., & Marchesan, G. (2015). A morphological filtering algorithm for fault detection in transmission lines during power swings. Electric Power Systems Research, 122, 10-18. https://doi.org/10.1016/j.epsr.2014.12.009

• Moustakas, K., Loizidou, M., Rehan, M., & Nizami, A. (2020). A review of recent developments in renewable and sustainable energy systems: Key challenges and future perspective. Renewable and Sustainable Energy Reviews, 119, Article 109418. https://doi.org/10.1016/j.rser.2019.109418

• Muljadi, E., Butterfield, C. P., Parsons, B., & Ellis, A. (2007). Effect of variable speed wind turbine generator on stability of a weak grid. IEEE Transactions on Energy Conversion, 22(1), 29-36. https://doi.org/10.1109/TEC.2006.889602

• Nasab, M. R., & Yaghobi, H. (2020). A real-time out-of-step protection strategy based on instantaneous active power deviation. IEEE Transactions on Power Delivery, 36(6), 3590-3600. https://doi.org/10.1109/TPWRD.2020.3045276

• Nayak, P. K., Rao, J. G., Kundu, P., Pradhan, A. K., & Bajpai, P. (2010). A comparative assessment of power swing detection techniques. In 2010 Joint International Conference on Power Electronics, Drives and Energy Systems & 2010 Power India (pp. 1-4). IEEE Publishing. https://doi.org/10.1109/PEDES.2010.5712568

• O’Donovan, M., Cowhey, E., Barry, N., & Connell, J. (2020). Assessment of Power Swing Blocking Functions. In 2020 55th International Universities Power Engineering Conference (UPEC) (pp. 1-6). IEEE Publishing. https://doi.org/10.1109/UPEC49904.2020.9209826

• Ontiveros, L. J., Mercado, P. E., & Suvire, G. O. (2010). A new model of the double-feed induction generator wind turbine. In 2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA) (pp. 263-269). IEEE Publishing. https://doi.org/10.1109/TDC-LA.2010.5762892

• Othman, M. L., & Aris, I. (2012). Inconsistent decision system: rough set data mining strategy to extract decision algorithm of a numerical distance relay–tutorial. In A. Karahoca (Ed.), Advances in Data Mining Knowledge Discovery and Applications. IntechOpen. https://doi.org/10.5772/50460

• Othman, M. L., Aris, I., Abdullah, S. M., Bakar, M. L. A. M. A., & Othman, M. R. (2009). Discovering decision algorithm of numerical distance relay using rough-set-theory-based data mining. European Journal of Scientific Research, 33(1), 30-56.

• Othman, M. L., Aris, I., Abdullah, S. M., Ali, M. L., & Othman, M. R. (2010). Knowledge discovery in distance relay event report: a comparative data-mining strategy of rough set theory with decision tree. IEEE Transactions on Power Delivery, 25(4), 2264-2287. https://doi.org/10.1109/TPWRD.2010.2055587

• Othman, M. L., Aris, I., & Ananthapadmanabha, T. (2016). Novel rule base development from IED-resident big data for protective relay analysis expert system. In S. V. Soto, J. M. Luna, & A. Cano (Eds.), Big Data on Real-World Applications. IntechOpen. https://doi.org/ 10.5772/63756

• Othman, M. L., Aris, I., Othman, M. R., & Osman, H. (2011). Rough-set-and-genetic-algorithm based data mining and rule quality measure to hypothesize distance protective relay operation characteristics from relay event report. International Journal of Electrical Power & Energy Systems, 33(8), 1437-1456. https://doi.org/10.1016/j.ijepes.2011.06.024

• Paladhi, S., Pradhan, A. K., & Rao, J. G. (2022). Accurate superimposed component estimation for improved relay performance during power swing. IEEE Systems Journal, 16(4), 6119-6129. https://doi.org/10.1109/JSYST.2021.3138758

• Patil, D., Naidu, O., Yalla, P., & Hida, S. (2019). An ensemble machine learning based fault classification method for faults during power swing. In 2019 IEEE Innovative Smart Grid Technologies-Asia (ISGT Asia) (pp. 4225-4230). IEEE Publishing. https://doi.org/10.1109/ISGT-Asia.2019.8881359

• Rampokanyo, M., & Kamera, P. (2018). Impact of increased penetration levels of distributed inverter-based generation on transient stability. In 2018 IEEE PES/IAS PowerAfrica (pp. 573-578). IEEE Publishing. https://doi.org/10.1109/PowerAfrica.2018.8521139

• Rao, A. V. K., & Ahmad, A. (2017). Power swing blocking (PSB) function for distance relay using prediction technique. International Journal of System Assurance Engineering and Management, 8(2), 301-307. https://doi.org/10.1007/s13198-016-0434-2

• Rao, A. V. K., Soni, K. M., Sinha, S. K., & Nasiruddin, I. (2017). Tracking of impedance trajectory for distance protection using neural networks. In 2017 4th IEEE Uttar Pradesh Section International Conference on Electrical, Computer and Electronics (UPCON) (pp. 289-294). IEEE Publishing. https://doi.org/10.1109/UPCON.2017.8251062

• Rao, J. G., & Pradhan, A. K. (2017). Supervising distance relay during power swing using synchrophasor measurements. IET Generation, Transmission & Distribution, 11(17), 4136-4145. https://doi.org/10.1049/iet-gtd.2016.1110

• Ratha, A. (2013). India’s blackouts of July 2012: What happened and why. ESI Bulletin on Energy Trends and Development, 5(4), 3-6.

• Saha, S., Das, S., & Nandi, C. (2014). Harmonics analysis of power electronics loads. International Journal of Computer Applications, 92(10), 32-36. https://research.ijcaonline.org/volume92/number10/pxc3895228.pdf

• Saleh, K. A., Moursi, M. S. E., & Zeineldin, H. H. (2015). A new protection scheme considering fault ride through requirements for transmission level interconnected wind parks. IEEE Transactions on Industrial Informatics, 11(6), 1324-1333. https://doi.org/10.1109/TII.2015.2479583

• Samuelsson, O., & Lindahl, S. (2005). On speed stability. IEEE Transactions on Power Systems, 20(2), 1179-1180. https://doi.org/10.1109/TPWRS.2005.846194

• Shafiullah, G. M., Oo, A. M. T., Ali, A. B. M. S., & Wolfs, P. (2013). Potential challenges of integrating large-scale wind energy into the power grid-A review. Renewable and Sustainable Energy Reviews, 20, 306-321. https://doi.org/10.1016/j.rser.2012.11.057

• Shair, J., Li, H., Hu, J., & Xie, X. (2021). Power system stability issues, classifications and research prospects in the context of high-penetration of renewables and power electronics. Renewable and Sustainable Energy Reviews, 145, Article 111111. https://doi.org/10.1016/j.rser.2021.111111

• Sinsel, S. R., Riemke, R. L., & Hoffmann, V. H. (2020). Challenges and solution technologies for the integration of variable renewable energy sources-A review. Renewable Energy, 145, 2271-2285. https://doi.org/10.1016/j.renene.2019.06.147

• Slootweg, J., & Kling, W. L. (2003). The impact of large scale wind power generation on power system oscillations. Electric Power Systems Research, 67(1), 9-20. https://doi.org/10.1016/S0378-7796(03)00089-0

• Sorrentino, E., Navas, G., & Orea, E. (2018). Effect of an additional large disturbance during power swings on the impedance seen by the out-of-step blocking function. International Journal of Electrical Power & Energy Systems, 99, 79-84. https://doi.org/10.1016/j.ijepes.2017.12.026

• Sravanthi, P., & Rani, K. R. (2014). Transient stability improvement of SCIG based wind farm with STATCOM. Journal of Electrical and Electronics Engineering Research (IJEEER), 4(2), 47-57.

• Swetapadma, A., & Yadav, A. (2016). Data-mining-based fault during power swing identification in power transmission system. IET Science, Measurement & Technology, 10(2), 130-139. https://doi.org/10.1049/iet-smt.2015.0169

• Taheri, B., & Razavi, F. (2018). Power swing detection using rms current measurements. Journal of Electrical Engineering and Technology, 13(5), 1831-1840.

• Taheri, B., Salehimehr, S., Razavi, F., & Parpaei, M. (2020). Detection of power swing and fault occurring simultaneously with power swing using instantaneous frequency. Energy Systems, 11, 491-514. https://doi.org/10.1007/s12667-018-00320-0

• Taheri, B., & Sedighizadeh, M. (2020). Detection of power swing and prevention of mal-operation of distance relay using compressed sensing theory. IET Generation, Transmission & Distribution, 14(23), 5558-5570. https://doi.org/10.1049/iet-gtd.2020.0540

• Tin, H., Abu-Siada, A., & Masoum, M. S. (2011). Impact of harmonics on the performance of over-current relays. In AUPEC 2011(pp. 1-4). IEEE Publishing.

• Torres, S., Esponda, H., Andrade, M., Vázquez, E., Paternina, M. R. A., Zamora, A., & Ramirez, J. M. (2016). Unblocking function of distance relay during power swing based on modal analysis. In 2016 IEEE PES Transmission & Distribution Conference and Exposition-Latin America (PES T&D-LA) (pp. 1-6). IEEE Publishing. https://doi.org/10.1109/TDC-LA.2016.7805633

• Tziouvaras, D. A., & Hou, D. (2004). Out-of-step protection fundamentals and advancements. In 57th Annual Conference for Protective Relay Engineers, 2004 (pp. 282-307). IEEE Publishing. https://doi.org/10.1109/CPRE.2004.238495

• Tu, D. V., Chaitusaney, S., & Yokoyama, A. (2014). Maximum-allowable distributed generation considering fault ride-through requirement and reach reduction of utility relay. In 2012 10th International Power & Energy Conference (IPEC) (pp. 127-134). IEEE Publishing. https://doi.org/10.1109/ASSCC.2012.6523251

• Verzosa, Q. (2013). Realistic testing of power swing blocking and out-of-step tripping functions. In 2013 66th Annual Conference for Protective Relay Engineers (pp. 420-449). IEEE Publishing. https://doi.org/10.1109/CPRE.2013.6822056

• Višić, I., Strnad, I., & Marušić, A. (2020). Synchronous generator out of step detection using real time load angle data. Energies, 13(13), Article 3336. https://doi.org/10.3390/en13133336

• Wannous, K., & Toman, P. (2018). Evaluation of harmonics impact on digital relays. Energies, 11(4), Article 893. https://doi.org/10.3390/en11040893

• Yan, R., Roediger, S., & Saha, T. K. (2011). Impact of photovoltaic power fluctuations by moving clouds on network voltage: A case study of an urban network. In AUPEC 2011 (pp. 1-6). IEEE Publishing.

• Yang, W., Zhou, X., & Xue, F. (2010). Impacts of large scale and high voltage level photovoltaic penetration on the security and stability of power system. In 2010 Asia-Pacific Power and Energy Engineering Conference (pp. 1-5). IEEE Publishing. https://doi.org/10.1109/APPEEC.2010.5448930

• Yellajosula, J. R. A. K., Wei, Y., Grebla, M., Paudyal, S., & Mork, B. A. (2019). Online detection of power swing using approximate stability boundaries. IEEE Transactions on Power Delivery, 35(3), 1220-1229. https://doi.org/10.1109/TPWRD.2019.2941522

• Ying, J., Yuan, X., & Hu, J. (2017). Inertia characteristic of DFIG-based WT under transient control and its impact on the first-swing stability of SGs. IEEE Transactions on Energy Conversion, 32(4), 1502-1511. https://doi.org/10.1109/TEC.2017.2698521

• Yoosefian, D., & Chabanloo, R. M. (2020). Protection of distribution network considering fault ride through requirements of wind parks. Electric Power Systems Research, 178, Article 106019. https://doi.org/10.1016/j.epsr.2019.106019

• Yusoff, N., & Abidin, A. F. (2013). The effect of solar Photovoltaic (PV) system to the characteristic of power swing. In 2013 IEEE 3rd International Conference on System Engineering and Technology (pp.99-102). https://doi.org/10.1109/ICSEngT.2013.6650151

• Zare, J., & Azad, S. P. (2020). A new distance protection scheme for SCIG-based wind farms. In 2020 IEEE Power & Energy Society General Meeting (PESGM) (pp. 1-5). IEEE Publishing. https://doi.org/10.1109/PESGM41954.2020.9281962

• Zheng, Q., Li, J., Ai, X., Wen, J., & Fang, J. (2017). Overivew of grid codes for photovoltaic integration. In 2017 IEEE Conference on Energy Internet and Energy System Integration (EI2) (pp. 1-6). IEEE Publishing. https://doi.org/10.1109/EI2.2017.8245501

• Zhu, S., Gu, Q., & Zheng, L. (2004). New swing-blocking methods for digital distance protection. In IEEE PES Power Systems Conference and Exposition, 2004 (pp. 587-591). IEEE Publishing. https://doi.org/10.1109/PSCE.2004.1397484