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improvement in system.pptx
- 1. MSc Research Proposal prepared by: (student name)
- 2. Contents 1. Title 2. Introduction 3. Literature survey 4. Problem definition 5. Objectives 6. Research questions 7. Outcomes 8. Conclusion 9. References
- 3. 1. Title Improvement of Voltage Stability in Low Voltage Networks Containing Solar PV Distribution Generation
- 4. 2. Introduction Previous year installed power (GW), 2011, 40 Previous year installed power (GW), 2012, 71 Previous year installed power (GW), 2013, 100 Previous year installed power (GW), 2014, 138 Previous year installed power (GW), 2015, 178 Previous year installed power (GW), 2016, 229 Previous year installed power (GW), 2017, 305 Previous year installed power (GW), 2018, 403 Previous year installed power (GW), 2019, 501 Previous year installed power (GW), 2020, 625 Annual addition (GW), 2011, 31 Annual addition (GW), 2012, 29 Annual addition (GW), 2013, 38 Annual addition (GW), 2014, 40 Annual addition (GW), 2015, 51 Annual addition (GW), 2016, 76 Annual addition (GW), 2017, 98 Annual addition (GW), 2018, 98 Annual addition (GW), 2019, 122 Annual addition (GW), 2020, 142 INSTALLED POWER (GW) YEAR Previous year installed power (GW) Annual addition (GW) Solar PV global installed capacity (GW) and its annual additions
- 5. The single line diagram of a LV network with solar PV consists of: Solar panels as renewable DGs, Energy storage units such as batteries, Converters; dc/dc for DC side and dc/ac for AC side, DC loads Main grid at point of common coupling (PCC).
- 6. Power quality issues related to voltage stability
- 7. 3. Literature Survey UPQC DVR SVC STATCOM Factors Higher rating High rating Low Low rating Rating Faster Fast Less than DVR Less than DVR Speed Series & Shunt Series Shunt Shunt Compensation Active and Reactive Active and Reactive Reactive Reactive Active/ Reactive Least Much less Less Less Harmonics Sag/swell/harmonics /transient/unbalance/ flicker Sag/harmonics/fluct uations/swell Sag/swell Sag/swell PQ issue Higher High Average Normal Cost Higher High High High Complexity Comparison between various mitigation devices to Power quality issues
- 8. 4. Problem definition Penetration of solar generation units into the main grid, although economically justified, but it is accompanied by power quality (PQ) problems. Such issues, as voltage deviations, flickers, and harmonic distortions in bus voltage and load current waveforms are major concerns today. Literature shows that voltage stability problems (voltage dips and voltage swells) represent about 48% of total power quality incidences. Voltage level at load buses in LV grid should be maintained to meet the specifications listed in PQ standards and satisfy the requirements of Distribution Generation (DG).
- 9. 5. Research Objectives To identify the effect of solar PV DGs on voltage profile in LV distribution networks. To specify the role of DG location inside the LV network, in voltage stability problem. To model a LV network embedded with solar units in order to evaluate the voltage stability and improve it.
- 10. 6. Research Questions How does DG units affect the voltage stability at load buses? Does the location of these units inside LV grid has any effect on voltage profile of load buses? What are the optimum mitigation technique that gives the best voltage stability?
- 11. Scope of Work Model a LV network with solar DG using available software package (PSCAD, ETAP, etc.). Carry out performance calculation to determine the voltage profile at load buses. Perform design configuration assessment with different proposed locations for the solar DGs. Use different types of active filters to improve voltage stability.
- 12. 7. Outcomes Modeling of proposed LV network is conducted. Joining various cases aiming to investigate the voltage sag/swell issue. Simulation firstly is carried out using the power system software “ETAP 16”. Secondly, optimum results are investigated via conducting different design calculations on the modelled network.
- 13. 8. Conclusions Limitations Outcomes PQ issue targeted Mitigation method -no standards followed -I reactive injected for V sag -supported V stability during faults V sag Adapted VSC control strategy -no elimination of Q exchange between DGs -reduced VHF to ≤ 1% -reduced THD V&I to ≤ 5% Harmonics & V unbalance DVR 1 -high cost & more complexity -V sag mitigation at different faults V sag DVR2 -more system complexity -V fluctuations & deviations are eliminated V fluctuations STATCOM - high cost & more complexity -reduced harmonics comply with IEEE 1547 standard Harmonics DSTATCOM -poor performance -V sag eliminated by Q injection during the event V sag SVC - high cost & more complexity -reduced V&I harmonics comply with IEEE standards Harmonics V&I UPQC Comparative methods of PQ issues & mitigation techniques in LV networks
- 14. Time Schedule Description Task Phase Study of current research in existing MGs with solar PV-based distribution generation. Topic Definition 1 Collect data from literature survey related to PQ issues and its mitigation methods for solar-based DGs in LV distribution grids. Literature Survey 2 The literature review is demonstrated and discussed to specify the gap in literature. Definition of gap in literature review 3 The simulation of the designed system of LV grid containing solar-based DG is carried via adequate computer software. Modelling 4 Evaluation of bus voltages through calculations conducted for various scenarios with different locations for solar DG in the LV grid. Performance calculations and Validations 5 Final thesis report writing and preparation. Thesis 6 Research phases definition
- 16. 9. References [1] Ammar A. Alkahtani, Saad T. Y. Alfalahi, Abedalgany A. Athamneh, Ali Q. Al-Shetwi, Muhamad Bin Mansor, M. A. Hannan, Vassilios G. Agelidis, "Power Quality in Microgrids Including Supraharmonics: Issues, Standards, and Mitigations", IEEE ACCESS, Volume 8, pp. 127104 - 127122, July 2020. [2] A. Novitskiy, S. Schlegel, D. Westermann, " Measurements and analysis of supraharmonic influences in a MV/LV network containing renewable energy sources", 2019 Electric Power Quality and Supply Reliability Conference and 2019 Symposium on Electrical Engineering and Mechatronics, PQ and SEEM 2019. [3] D. Amaripadath, R. Roche, L. Joseph-Auguste, D. Istrate, D. Fortune, J.P. Braun4, F. Gao, "Power Quality Disturbances on Smart Grids: Overview and Grid Measurement Configurations", 2017, 52nd International Universities Power Engineering Conference (UPEC), 2017. [4] Renewable Energy World Editors, "142 GW of global solar capacity will be added in 2020, says HIS", online article, https://www.renewableenergyworld.com/2020/01/10/142-gw-of-solar-capacity-will-be-added-to-the-global- market-in-2020-says-ihs/ [5] P. Prabhakar, H. Vennila, "Power Quality improvement in microgrid using Custom Power Devices", International Journal of Enterprise Network Management, Volume 8, Issue 4, 2017. [6] Eklas Hossain, M. R. TÜR, S. Padmanaban, S. AY, and I. Khan, "Analysis and Mitigation of Power Quality Issues in Distributed Generation Systems Using Custom Power Devices", IEEE Access, pp. 16816-16833, VOL. 6, 2018. [7] P. M. Arockia Dass, Omkar S Pawar, and A. Peer Fathima, "Voltage Sag and Harmonic Compensation of PV Fed Unified Power Quality Conditioner", I J C T A, 9(2) 2016, pp. 741-748, International Science Press. [8] J. Huang and Z. Jiang, "Power Quality Assessment of Different Load Categories", Energy Procedia 141 (2017), pp. 345–351. 2020 International SAUPEC/RobMech/PRASA Conference.
- 17. [9] R. Dash, S. C. Swain, "Effective Power quality improvement using Dynamic Activate compensation system with Renewable grid interfaced sources", Ain Shams Engineering Journal 9 (2018) 2897–2905. [10] M. Gayatri, A. M. Parimi, and A. P. Kumar, "Utilization of Unified Power Quality Conditioner for voltage sag/swell mitigation in microgrid", Biennial International Conference on Power and Energy Systems: Towards Sustainable Energy (PESTSE), pp. 1-6, 2016. [11] T. Sridevi and Y. Suri Babu, “Mitigation of voltage sag and swell in a Grid connected PV system by using Dynamic Voltage Restorer”, International Journal of Creative Research Thoughts ( IJCRT), Volume 6, Issue 2 April 2018. [12] Rahul G. Suryavanshi and Irana Korachagaon, “A review on power quality issues due to high penetration level of solar generated power on the grid”, 2nd International Conference on Power and Embedded Drive Control (ICPEDC). [13] Basanta K. Panigrahi et al., “Power Quality Analysis In A PV Connected Hybrid System”, 2018 2nd International Conference on Data Science and Business Analytics. [14] Thabeti Aditya et al., “Power Quality Analysis, Challenges and Feasible Solutions of 90 kWp Grid-Integrated PV System”, 2020 International Conference on Emerging Trends in Information Technology and Engineering (ic-ETITE). [15] Sachin Devassy and Bhim Singh, “Design and Performance Analysis of Three-Phase Solar PV Integrated UPQC”, IEEE Transactions On Industry Applications, Vol. 54, No. 1, January/February 2018. [16] Oluwafunso O. Osaloni and Ashky Kumar Saha, “ Distributed Generation Interconnection with Improved Unified Power Quality Conditioner for Power Quality Mitigation”, 2020 International SAUPEC/RobMech/PRASA Conference. [17] Afaneen A. Abbood, Mohammed A. Salih and Ashraf Y. Mohammed, “Performance Improving of Grid Connected Photovoltaic System with Grid Contain Heavily Outages ”, International Journal of Current Engineering and Technology , Vol.7, No.6 (Nov/Dec 2017 ).