{"title":"Enhance Selectivity of Cross Differential Relay for Parallel Lines Connecting Solar Photovoltaic Plant","authors":"Arghadeep Chowdhury, S. Paladhi, Anu Pradhan","doi":"10.1109/NPSC57038.2022.10069857","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069857","url":null,"abstract":"Cross differential relay is used for protecting parallel lines. For such lines connecting a solar PV plant to the grid, the current modulation by the plant during fault affects the selectivity of conventional cross differential relay. This work proposes a modified cross differential technique using positive sequence currents and prefault voltage at local bus for protection of parallel lines connecting PV plant. Performance of the proposed method is tested for different fault conditions in PV integrated IEEE-9 bus system.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115223304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dynamic Phasor and Frequency Estimation Based on Variable Step Size Weibull M-Transform","authors":"Kuber Saxena, S. Nanda, S. Samantaray","doi":"10.1109/NPSC57038.2022.10069393","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069393","url":null,"abstract":"The key to the stable and dependable operation of a power system and its control equipment is the accurate and rapid estimation of the system’s phasors and frequency. Numerous research has been conducted on phasor estimation techniques under steady state and dynamic conditions. Although the performance of an estimator based on a static phasor has improved under dynamic conditions, significant errors are still present during large deviations. So, a new approach is presented in this paper to improve phasor estimation during dynamic conditions using Variable Step Size Weibull M transform. The corresponding methods aims on low intricacy adaptive filter using dynamic signal modelling method, whose parameters are calibrated using a new variable step size algorithm by establishing a new nonlinear relationship between the step size and error, the algorithm eliminates the trivial noise and improve the convergence rate to achieve good stability, low complexity, improved precision, faster response, and better noise cancellation.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115736994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Operational Risk Assessment based Energy Management in Microgrid using PV Generation","authors":"K. Sandhya, K. Chatterjee","doi":"10.1109/NPSC57038.2022.10068949","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10068949","url":null,"abstract":"Microgrids are small distribution system interconnected to distributed energy sources and battery energy system to meet its local demand independently or in coordination with the main grid. This characteristic of microgrid can be used as an alternative to reliance on electricity generation and distribution when grid remains inoperable due to technical glitches or catastrophic severities. To exploit this advantage of microgrid, this paper proposes an operational risk assessment based energy management of microgrid. The risk assessment has been achieved by appraising the microgrid value in the presence and absence of grid energy. After assessing the microgrid value, energy management of the system using PV and battery energy storage by linear programming optimization technique has been performed to proliferation microgrid antifragilie nature. This further led to the increase in system reliability and robustness. The efficacy of the proposed work has been demonstrated using a small network model consisting of utility grid, Photovoltaic (PV) array, batteries and variable load whose energy management was optimized using linear programming technique to obtain a robust and reliable system when operated with the grid or in isolation.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115485701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"HGO based Stator Side Converter Control with Reduced Current Sensors of RT-DFIG for WECS","authors":"Md Sabbir Haider Khan, Sanjeev Kumar Mallik","doi":"10.1109/NPSC57038.2022.10069364","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069364","url":null,"abstract":"Model-based speed estimation, a well-known mechanical sensorless control method, implements FOC in a doubly fed induction generator (DFIG) based wind energy conversion system (WECS) in both stator-tied and rotor-tied configurations. High gain observers (HGO) are popular due to their stable exponential convergence, resistance to parametric variations, and ease of deployment with a fixed gain parameter. A minimum of four to six current sensors mounted on rotor and stator terminals are required for rotor-tied DFIG (RT-DFIG) HGO design. An alternative HGO design for mechanical speed estimation is proposed in this paper. It enables RT-DFIG sensorless FOC control with only two current sensors. Since fewer physical components are required to complete the system, complexity and cost are reduced. The elimination of two existing sensors improves hardware reliability. The proposed algorithm uses only two stator current sensors. The proposed reduced sensor HGO architecture is tested in Matlab/Simulink for both static and dynamic wind conditions. Compared to the existing HGO design, this HGO with a reduced sensor performs well under diverse operating conditions.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114078459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fault Tolerant Modified Asymmetric MLI Topologies with Reduced Switch Count","authors":"N. Muraly, P. Ajay-D-Vimal Raj, N. Subramaniam","doi":"10.1109/NPSC57038.2022.10069297","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069297","url":null,"abstract":"The goal of this research work, is to enable fault tolerance in Multilevel Inverter (MLI) technique utilizing Asymmetric Reduced Switch Count (ARSC). In Symmetric Reduced Switch Count (SRSC) inverters possible switching sequence is less for a specific output voltage level. Due to the reduced device count, the lack of redundant states impacts the capability of fault tolerant operation and severely compromises the inverter’s reliability, which resulting in the system’s complete shutdown. Whereas in ARSC inverters redundant states are almost naught for various inverter output voltage levels. Therefore, in this proposed paper the operation of a seven-level asymmetric inverter is analyzed in the event of single and double open switch failures. The general structure of an asymmetric seven-level inverter is modified by inclusion of bidirectional switches and two new asymmetric inverters topologies have been proposed with fault tolerant operational facility. The proposed topologies sustain output voltage either at five level or three level for an open switch fault in one or two switches. Circuits were simulated in the simulation of MATLAB environment and outcomes were checked in order to validate the efficacy of suggested topologies.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121577624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. R. Mishra, A. K. Verma, Anjali Jain, Parul Mathuria, R. Bhakar
{"title":"Carbon Capture Utilization and Storage: Pathways for India","authors":"P. R. Mishra, A. K. Verma, Anjali Jain, Parul Mathuria, R. Bhakar","doi":"10.1109/NPSC57038.2022.10069425","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069425","url":null,"abstract":"Carbon Capture Utilization and Storage (CCUS) would be an essential component of various strategies to address global climate change. It will play a major role in removing carbon emissions that can not be avoided. The countries are adopting and have successfully practiced various financial/ policy instruments such as carbon pricing, tax credits, and procurement programs in favour of low-carbon products to make CCUS economically viable. India is one of the countries those have submitted their net-zero emission targets. However, hard-toabate sectors like industries and irreplaceable coal power plants that jointly contribute to almost 80% of total CO2 emissions, can achieve net-zero only by utilisation of negative emission technologies such as CCUS. CCUS technology allows various capture methods followed by different separation technologies of CO2. The transportation of CO2 can be done through pipelines, rails, trucks, and ships. The captured CO2 can be converted into different products for various applications and storage. In this paper, different CCUS technologies with various methods of CO2 separation and carbon capture are discussed. The paper presents a short review of different CCUS projects running in India at a pilot stage along with challenges in their commercial implementation.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129944918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"VSC-HVDC System Based Ancillary Services for AC Grids","authors":"A. Kumar, Wei Li","doi":"10.1109/NPSC57038.2022.10069972","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069972","url":null,"abstract":"In viewing an increased ratio of renewable resources like solar and wind farms, point-to-point Voltage Source Converter based High Voltage DC (VSC-HVDC) system commissioning are on the rise worldwide. They are becoming techno-economical solutions for integrating bulk renewable resources into significant load centers. In this scenario, it is requisite by most of the grid codes that VSC-HVDC grids need to provide ancillary services to the AC grids. Ancillary services such as active power and frequency support are crucial for the stability and reliability of the power system. Henceforth, this paper proposes a control strategy to achieve these ancillary services through the VSC-HVDC system. The proposed control method introduces the active power and frequency loops into conventional control and extracts the support from a point-to-point VSC-HVDC system. To validate the proposed control strategy, two case studies and a test system which is a point-to-point VSC-HVDC integrated into Kundur’s two-area power system, have been considered. An RT-LAB simulation platform has been used to develop and model the test system. Further, the performance of the proposed method is demonstrated in real-time by using one of the OPAL-RT simulators, OP5707.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128490389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparative Study of Population-Based Algorithms for Solar PV Array Reconfiguration System for Partial Shading Conditions","authors":"Mallela Sahithi Prabhad, A. Badar","doi":"10.1109/NPSC57038.2022.10069258","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069258","url":null,"abstract":"Photovoltaics are one of the widely used renewables and play an indispensable role in meeting the increased energy demand in recent times. Partial shading condition occurs due to non-uniform irradiance across the PV panels which greatly reduces the efficiency and output of the PV plants. Several techniques were developed as a tool to reduce the vulnerability of partial shading in literature out of which PV array reconfiguration system is found to be a competent technique for obtaining the maximum power in such conditions. The dynamic reconfiguration of PV system is accomplished by redistributing the modules based on their shading levels. Therefore, this paper compares different algorithms based on population such as Differential Evolution (DE), Rao’s optimization, Particle Swarm optimization (PSO), Reptile Search Algorithm (RSA) and Manta Ray Foraging optimization (MRFO) aiming to provide the optimum pattern for PV reconfiguration to produce maximum power output under varied conditions of partially shaded PV array. The presented work considers PV array in total-cross-tied (TCT) configuration and the results are compared considering the metrics like maximum power output obtained and fill factor.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124563263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Differential Protection for Lines Connected to Inverter-Based Resources: Problems and Solution","authors":"N. George, O. Naidu, A. Pradhan","doi":"10.1109/NPSC57038.2022.10069220","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069220","url":null,"abstract":"Inverter based renewable energy resources with controlled current output has fault characteristics different from traditional synchronous generators. In this paper, we analyze how the peculiar fault current characteristics of these sources impact percentage and alpha plane line differential protection. Inherent phase selection capability, dependability, and speed of operation of alpha plane differential is identified to be impacted mainly due to increased system non-homogeneity. Dependability of percentage differential protection is also marginally impacted particularly when the grid end is also weak. Further, a time domain energy-based current differential protection is proposed, which has advantages when compared to existing line differential protection solutions. Extensive testing, and validation using field records, demonstrates improved reliability, sensitivity, and speed of the proposed method for synchronous generator as well as IBR-connected lines.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127680276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Controller Hardware-In-Loop Validation of Synchronverter in Islanded Microgrid","authors":"R. R. Pawar, Trapti Jain","doi":"10.1109/NPSC57038.2022.10069772","DOIUrl":"https://doi.org/10.1109/NPSC57038.2022.10069772","url":null,"abstract":"Recent developments in microgrid has introduced various new challenges in stability of power system. One of them is decreasing inertia due to the growing penetration of Distributed Generators (DGs) in the grid. Concept of implementation of virtual inertia in control of these converters is currently a topic of wide interest. One of the control strategies to implement virtual inertia is synchronverter. DGs use, mostly, renewable sources (PV and Wind turbines) and hence need power electronic converters to integrate them with grid. Stability of operation depends on the control scheme used in these converters. This paper develops a small signal state space model for synchronverter operating in islanded mode. Modelling is done individually for power calculation block, synchronverter, LC filter with coupling inductor, and loads. These sub-modules are then combined to get the complete model of the system, and the eigenvalue analysis is performed. Further, the system is simulated in RSCAD and Controller Hardware-In-Loop (CHIL) study is performed to validate the proposed control in islanded mode.","PeriodicalId":162808,"journal":{"name":"2022 22nd National Power Systems Conference (NPSC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123769556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}