{"title":"Grid Current Feed-forward based Transfer Scheme for Grid-tied Inverters with Anti-islanding Schemes","authors":"Sugoto Maulik, V. John","doi":"10.1109/PEDES56012.2022.10080563","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080563","url":null,"abstract":"Grid-connected distributed resources operate in current or power control mode when in grid-tied conditions. However, in islanded conditions, the inverters operate in grid forming mode to feed local loads. This paper proposes a method for the inverter to transfer from grid-tied to grid-forming mode after an islanding event considering the operating point tolerances when detecting an unintentional island. This transfer is undertaken using a control structure comprising of an instant switch from current control to voltage control mode utilizing an islanding detection signal and a grid current feed-forward term. Islanding detection plays a significant role in the transfer of control scheme by providing the initial stimulus for transfer. Hence, all transfer schemes act after an island is detected and the system has deviated from its steady-state conditions. The magnitude of deviation depends on the generation-load imbalance and the time taken for detection. Active anti-islanding schemes tend to force a larger deviation. The proposed method thus returns the deviated system to its nominal operating range within one power cycle by providing a grid current feed-forward signal to offset the effect of generation-load imbalance. This is achieved with minimal operating point disturbance as seen by the local load.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124570148","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":"PWM-Based Optimal Predictive Direct Torque Control of Switched Reluctance Machine","authors":"Mouli Thirumalasetty, G. Narayanan","doi":"10.1109/PEDES56012.2022.10080561","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080561","url":null,"abstract":"This paper proposes a novel PWM-based predictive torque controller for Switched Reluctance Machines (SRM). The phase currents are predicted using a simplified flux linkage model, and phase torques are predicted from static-torque characteristics. Both predicted currents and phase torques are then expressed in incremental duty ratio. A cost function to minimize the primary objective of instantaneous torque error and the secondary objective of RMS currents is then solved online to obtain the optimal duty ratio at every switching period. The impact of weight given to the RMS currents in the cost function is studied through experiments and simulation. An appropriate weight to ensure acceptable torque performance and RMS phase currents is selected. The proposed controller is validated through experiments and simulations on a 4-phase, 8/6 pole SRM at different operating conditions.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114863705","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}
Suresh Katta, N. Jayaram, J. Rajesh, Sukanta Halder
{"title":"An Improved Cascaded H-Bridge Based High Power Factor Converter with Enhanced Power Quality","authors":"Suresh Katta, N. Jayaram, J. Rajesh, Sukanta Halder","doi":"10.1109/PEDES56012.2022.10080865","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080865","url":null,"abstract":"An individual linear control scheme has been designed to improve the performance of 3-phase, 3.3 kV, 1MW, 5-level Cascaded H-Bridge (CHB) based High Power Factor Converter (HPFC). This individual control scheme exhibits the cell balancing system addressing the problem of DC voltage regulation in each H-bridge cell when loaded asymmetrically and current harmonics in the input source is reduced. This methodology ensures that voltages across DC bus capacitor retains to a preset value, even if the loads demand different powers. Additionally, this methodology achieves stability during the DC load perturbations at all modes of operation. In anticipation to adopt conventional Multi Level Sinusoidal Pulse Width Modulation (MLSPWM) scheme, an individual unipolar Sinusoidal PWM (SPWM) is acquired to apply on each H-Bridge cell for individual control to achieve the target. This effort addresses and curtails the capacitor unbalancing problem due to power mismatch between the loads attached to the cells and other performance indices of HPFC. The evaluation and impact of the proposed strategy is augmented by various simulations and the results are verified with dSPACE 1104 based real time experimental studies","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117131161","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":"Machine Learning-based Modification of Communication Assisted TRIP Schemes deployed with Distance Relays","authors":"sudarshan khond, V. Kale, M. Ballal","doi":"10.1109/PEDES56012.2022.10079985","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10079985","url":null,"abstract":"Inadvertent over/ under reach of the distance relays due to variable DC offset, fault resistance, infeed, and CT and PT errors cause the pessimistic setting of the distance relays. Hence the faults occurring close to either end of the transmission section under protection are cleared with unintentional time delays. To avoid the same, distance relays are incorporated with communication-assisted TRIP schemes where the relay issues a TRIP signal in addition to the distance relay TRIP. The communication-assisted TRIP schemes are Direct/Permissive Over/Under Reach Trip schemes (DUTT/ DOTT/ PUTT/POTT). However, certain weaknesses in the communication-assisted TRIP schemes result in unintentionally long fault-clearing times and nuisance TRIP. In the presented study, the weaknesses of communication-assisted TRIP schemes are elaborated and a data-driven, adaptive Machine Learning (ML) based solution is proposed to improve the selectivity of the relaying scheme. Also, with the deployment of the ML-based relay, the fault sensitivity is improved. Moreover, an ensemble-based approach to data mining is presented that improves computational speed by reducing the computational burden.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124004180","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}
Raghava Ram BharadwajV, Chaitanya Shambharkar, Shivprasad Desai, R. Wandhare, J. Titus, V. Sarkar, R. Bhimasingu
{"title":"Bi-Directional Power Flow Control in Grid Integrated Solar PV Connected Water Pump System","authors":"Raghava Ram BharadwajV, Chaitanya Shambharkar, Shivprasad Desai, R. Wandhare, J. Titus, V. Sarkar, R. Bhimasingu","doi":"10.1109/PEDES56012.2022.10080266","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080266","url":null,"abstract":"This paper proposes a grid connected solar photovoltaic (PV) fed water pumping system for agriculture and irrigation purposes, with bi-directional power flow functionality. PV generated power can be transferred into the grid when water pumping is not needed, to improve its capacity utilization factor. It is achieved by the voltage source converted integrating the DC link of the conventional single stage or two stage PV fed water pumping system, proving several other benefits. The pump can run at its duty point (efficient point) in spite of large variation in the insolation level. For applying the $boldsymbol{dq}$ control technique, the single phase grid voltage is taken as a real signal, and an imaginary signal is generated by shifting it by 90°. These real and imaginary signals are considered $alphabeta$, and $boldsymbol{dq}$ transformation is achieved. The voltage source converter tries to keep the DC link voltage constant at a specified reference. This proposed system allows the consumer to use the water pump at full capacity throughout the day, irrespective of the weather condition. The consumer can also export the PV power generated when the water pump is not being used. Maximum power point operation of PV array is also achieved in this system.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124123772","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":"Computer Vision based Framework for Power Converter Identification and Analysis","authors":"Bharat Bohara, H. Krishnamoorthy","doi":"10.1109/PEDES56012.2022.10080752","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080752","url":null,"abstract":"This paper proposes a computer vision-based framework to identify the topology of a hand-drawn image or schematic of a power converter circuit and perform automated simulations. For component detection, a deep learning-based model, i.e., YOLOR, the state-of-the-art object detection model, is used with a model accuracy mAP0.5 of 91.6%. In order to trace the wire connections in the circuit diagram, a classical Hough transform algorithm is used. The nodes of the circuit diagram are identified with K-Means clustering of the point-of-intersections between the horizontal and vertical lines. With the help of the position of the components detected and the nodes, a netlist of the circuit diagram is generated that can be fed into any spice-based circuit simulator. An automated simulation of the schematic of the power converter is done with the help of PySpice - an open-source python module, to simulate the electronic circuit that runs a spice-based simulation engine, i.e., ngspice and xyce on the backend. The proposed methods have been verified using the main non-isolated DC-DC converters (buck, boost, and buck-boost). It is envisioned that this framework can also act as an educational tool. Moreover, the proposed concepts can be extended to create fully automated and optimal power converter designs for practical applications.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126129657","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":"Design and Analysis of Four-Plate Capacitive Couplers for Wireless Charging Systems","authors":"Pramod Patidar, D. Ronanki, A. Dekka","doi":"10.1109/PEDES56012.2022.10080748","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080748","url":null,"abstract":"Capacitive power transfer (CPT) systems have become a popular alternative to inductive power transfer (IPT) systems owing to their unique features such as better misalignment tolerance, relatively inexpensive, and lightweight. However, the main concern with CPT is the low coupling capacitance (typically pico farads (pF) range) between transmitter and receiver plates due to the natural low permittivity in air. Consequently, the power transfer capability is limited, which makes CPT systems unsuitable for high-power large air gap applications. This paper investigates a new four-plate coupler structure with a dielectric medium on the transmitter and receiver plates. The proposed design of the CPT coupler increases the coupling coefficient and improves the power density of the coupler with a better misalignment tolerance. The effectiveness of the proposed CPT coupler is validated through ANSYS-Maxwell simulations. Furthermore, its performance is compared with other configurations in terms of electric field emissions, misalignment tolerance, and coupling capacitance values at a constant excitation.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124729095","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}
Karthik Singh Parihar, Wajahat F. Khan, Jahangeer Ahmad Dar, M. K. Pathak
{"title":"A Hybrid modulation scheme for AC-AC Dual Active Bridge-based Solid-State Transformer","authors":"Karthik Singh Parihar, Wajahat F. Khan, Jahangeer Ahmad Dar, M. K. Pathak","doi":"10.1109/PEDES56012.2022.10080750","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080750","url":null,"abstract":"A hybrid modulation scheme for a Dual Active Bridge (DAB) based Solid-State Transformer (SST) is proposed in this paper. The topology consists of an input folding bridge, a DAB DC-DC converter with a half-bridge structure on the primary side, a full-bridge on the secondary side, and an output unfolding bridge. The conventional Phase-Shift Modulation (PSM) control technique exceeds the soft-switching boundary conditions under light load conditions and suffers from high current stress, which lowers the overall efficiency of the DAB-based SST converter. This article employs a hybrid modulation-based control strategy to overcome these limitations. Within this control strategy, an optimal control path for full power range is proposed, which extends the soft-switching range under light load conditions and lowers the current stress. Simulation results are provided to validate the effectiveness of the proposed control strategy.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128390625","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":"Perturb and Observe based Online MTPA of PM Assisted SynRM for Traction Application","authors":"Laukik Desai, G. Ghosh, Anchal Saxena","doi":"10.1109/PEDES56012.2022.10080811","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080811","url":null,"abstract":"Maximum torque per ampere (MTPA) control is necessary for achieving highest possible operational efficiency of a permanent magnet assisted synchronous reluctance motor (PMA-SynRM). However, large degree of parameter variation in these motors due to core saturation, elevated temperature and age makes it very difficult to implement a theoretical rule based MTPA that can achieve an acceptable degree of accuracy. Automatic MTPA approaches proposed till now present problems of increased computational intensity and requirement of extensive testing before control design. This paper attempts to address these issues by proposing a perturb and observe based online MTPA approach that is computationally simple and compensates parameter uncertainties automatically. Detailed simulation results are discussed to validate the accuracy of its MTPA trajectory and dynamic performance.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128399786","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}
Sreejith M R, V. A, Sunil K M, Dipak Sagar, Ravichandran M H
{"title":"Design of Magnetic Bearing and BLDC Motor for a Novel Third-Generation LVAD","authors":"Sreejith M R, V. A, Sunil K M, Dipak Sagar, Ravichandran M H","doi":"10.1109/PEDES56012.2022.10080849","DOIUrl":"https://doi.org/10.1109/PEDES56012.2022.10080849","url":null,"abstract":"In the last decade, considerable development is achieved in the usage of blood pumps for the treatment of heart failure instead of heart transplants. Blood pumps demand small size, lightweight, low power operation, and minimum blood damage with increased lifetime and reliability. The third-generation Left Ventricular Assist Device (LVAD) is a non-contact pump with a magnetic bearing and/or hydrodynamic bearing. The main attraction of the levitated rotor over conventional mechanical bearings is the increased life of the device. This paper focuses on the design of magnetic bearing and drive motor for a novel third-generation LVAD. In the proposed novel LVAD configuration, a centrifugal pump is levitated by an active magnetic bearing in the radial plane and by a passive magnetic bearing in the axial direction. The impeller of the pump is rotated using a BLDC motor configured in the same plane of magnetic bearing. Eddy current based gap sensors are used for sensing the rotor position.","PeriodicalId":161541,"journal":{"name":"2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128544165","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}