Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375769
Venkatanarasimharao Medam, P. Anil Kumar, S. Sahoo, Roger Looney
This paper proposes a Reactive power-based Model Reference Adaptive Controller (Q-MRAC) for the real-time estimation of rotor resistance considering the magnetizing inductance saturation, for an IFOC based induction motor drive used in electric vehicle (EV). The online estimated rotor resistance is updated in the IFOC operation by carefully observing the dynamics of the EV. In general, EVs operate in the flux saturation region to achieve higher gradients as well as the compactness of the overall drive system. The saturated flux operation of an induction motor has a variable magnetizing inductance profile depending on the level of saturation. The proposed Q-MRAC considers the complete magnetizing inductance variation profile to estimate an accurate value of rotor resistance, and updates into the IFOC algorithm without affecting the vehicle dynamics. The proposed controller makes the EV drive system more efficient. This estimation works accurately at all magnetization levels and stator frequencies. The simulation results validate the effectiveness of the proposed estimation technique.
{"title":"Q-MRAC Based Online Rotor Resistance Estimation Technique Considering the Saturated Magnetizing Inductance of an Indirect Rotor Flux Oriented Vector Controlled Induction Motor Drive for an Electric Vehicle","authors":"Venkatanarasimharao Medam, P. Anil Kumar, S. Sahoo, Roger Looney","doi":"10.1109/SeFet48154.2021.9375769","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375769","url":null,"abstract":"This paper proposes a Reactive power-based Model Reference Adaptive Controller (Q-MRAC) for the real-time estimation of rotor resistance considering the magnetizing inductance saturation, for an IFOC based induction motor drive used in electric vehicle (EV). The online estimated rotor resistance is updated in the IFOC operation by carefully observing the dynamics of the EV. In general, EVs operate in the flux saturation region to achieve higher gradients as well as the compactness of the overall drive system. The saturated flux operation of an induction motor has a variable magnetizing inductance profile depending on the level of saturation. The proposed Q-MRAC considers the complete magnetizing inductance variation profile to estimate an accurate value of rotor resistance, and updates into the IFOC algorithm without affecting the vehicle dynamics. The proposed controller makes the EV drive system more efficient. This estimation works accurately at all magnetization levels and stator frequencies. The simulation results validate the effectiveness of the proposed estimation technique.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130191060","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375784
V. R. Raju, K. H. Phani Shree, S. V. Jayarama Kumar
Modern power networks are operating under heavy stress due to the intrusion of unprecedented loads and unpredictable energy resources. Networks are operated at their peak capacity to meet the demand. These circumstances forced the operators to opt for Wide Area Measurements and Control (WAMC) schemes for real-time monitoring, control, and protection. Synchrophaosr technology has evolved as a promising technology for the implementation of WAMC. Phasor Measurement Units (PMUs) can provide the synchrophasor data along with frequency and Rate of Change of Frequency (ROCOF). Whereas the deployment of these devices was limited due to higher price tags. This constraint has been dealt with in this study by identifying the optimal locations for PMU placement considering the measurement redundancy.In the present study, the optimal PMU placement problem is formulated using binary decision variables (1,0) representing the existence or non-existence of PMU at that bus. Initially, an additive algorithm to solve linear problems with binary decision variables, Balas additive algorithm (BAA) is tested to solve the optimal PMU placement problem. After understanding the challenges a nature-inspired algorithm, Binary Particle Swarm Optimization (BPSO) technique is used to solve the problem. While maintaining the complete system observability, the presence of Zero Injection Busses (ZIB) is also exploited to reduce the count of PMUs. Consequences of optimal placement problem (OPP) like, measurement reliability is also addressed considering redundancy in measurements. Finally, the existence of multiple solutions was solved by introducing Bus Observability Index (BOI) and the System Observability Redundancy Index (SORI) rankings. Algorithms are tested on standard IEEE systems. Results have shown, less than 25% of the busses demanded PMU placement for full system observability, at the same time the number of installations increased with measurement redundancy.
{"title":"Measurement Redundancy constrained Optimal PMU Locations","authors":"V. R. Raju, K. H. Phani Shree, S. V. Jayarama Kumar","doi":"10.1109/SeFet48154.2021.9375784","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375784","url":null,"abstract":"Modern power networks are operating under heavy stress due to the intrusion of unprecedented loads and unpredictable energy resources. Networks are operated at their peak capacity to meet the demand. These circumstances forced the operators to opt for Wide Area Measurements and Control (WAMC) schemes for real-time monitoring, control, and protection. Synchrophaosr technology has evolved as a promising technology for the implementation of WAMC. Phasor Measurement Units (PMUs) can provide the synchrophasor data along with frequency and Rate of Change of Frequency (ROCOF). Whereas the deployment of these devices was limited due to higher price tags. This constraint has been dealt with in this study by identifying the optimal locations for PMU placement considering the measurement redundancy.In the present study, the optimal PMU placement problem is formulated using binary decision variables (1,0) representing the existence or non-existence of PMU at that bus. Initially, an additive algorithm to solve linear problems with binary decision variables, Balas additive algorithm (BAA) is tested to solve the optimal PMU placement problem. After understanding the challenges a nature-inspired algorithm, Binary Particle Swarm Optimization (BPSO) technique is used to solve the problem. While maintaining the complete system observability, the presence of Zero Injection Busses (ZIB) is also exploited to reduce the count of PMUs. Consequences of optimal placement problem (OPP) like, measurement reliability is also addressed considering redundancy in measurements. Finally, the existence of multiple solutions was solved by introducing Bus Observability Index (BOI) and the System Observability Redundancy Index (SORI) rankings. Algorithms are tested on standard IEEE systems. Results have shown, less than 25% of the busses demanded PMU placement for full system observability, at the same time the number of installations increased with measurement redundancy.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133210108","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375764
Rithvik Reddy Adapap, S. S. Nawaz, D. G. Padhan
This paper analyses different types of coil systems to produce volumes of uniform magnetic field. The square spiral coils are easier to implement than the circular ones. In this paper, a new analytical calculation for magnetic flux density of the spiral coils is presented, which is simpler than the greenhouse method. This paper presents a comparative study of the magnetic field distribution for circular and square coils. The magnetic flux density is obtained using the Biot- Savart’s law, furthermore a detailed analysis is performed in order to obtain simple mathematical expressions that relate the area, with uniform magnetic field, to the length of the different coils and number turns of the coils. Two adaptations of the Biot- Savart’s law are developed in this paper which offer a means of calculating the flux density given the position of interest, the coil geometry, and the amount current passing through the coil. The calculation of the magnetic flux density using analytical formulas and finite element simulations are compared. Finally, a cube volume of uniform magnetic field in each coil is calculated. In this paper magnetic flux densities are determined for different currents at various locations for circular coil as well as square coil. Computational models are constructed and simulated using ANSYSS Maxwell software in order to validate the calculated results of the magnetic field distribution of each geometry considering similar parameters.
{"title":"Analytical Study of Magnetic Flux Density for Circular Spiral and Square Spiral Coils","authors":"Rithvik Reddy Adapap, S. S. Nawaz, D. G. Padhan","doi":"10.1109/SeFet48154.2021.9375764","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375764","url":null,"abstract":"This paper analyses different types of coil systems to produce volumes of uniform magnetic field. The square spiral coils are easier to implement than the circular ones. In this paper, a new analytical calculation for magnetic flux density of the spiral coils is presented, which is simpler than the greenhouse method. This paper presents a comparative study of the magnetic field distribution for circular and square coils. The magnetic flux density is obtained using the Biot- Savart’s law, furthermore a detailed analysis is performed in order to obtain simple mathematical expressions that relate the area, with uniform magnetic field, to the length of the different coils and number turns of the coils. Two adaptations of the Biot- Savart’s law are developed in this paper which offer a means of calculating the flux density given the position of interest, the coil geometry, and the amount current passing through the coil. The calculation of the magnetic flux density using analytical formulas and finite element simulations are compared. Finally, a cube volume of uniform magnetic field in each coil is calculated. In this paper magnetic flux densities are determined for different currents at various locations for circular coil as well as square coil. Computational models are constructed and simulated using ANSYSS Maxwell software in order to validate the calculated results of the magnetic field distribution of each geometry considering similar parameters.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"608 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134545406","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375651
Dasaratha Sahu, P. S. R. Nayak
The current environmental apprehensions are fascinating the world to swift towards green technology. The development of renewable energy-based equipment and machinery are increasing the approaches towards a pollution free world. In this paper, the substantial modelling and performance analysis of a solar powered electric rickshaw (e-Rickshaw) for different drive cycles is presented. The modelling of the e-Rickshaw is done as per design methodology of solar charger, battery bank, electric motor, e-Rickshaw drive train suitable for different drive cycles and different components to provide the required traction. The e-Rickshaw is having onboard solar charging system with provision of grid charging through suitable DC power plug. The battery bank supplies the power to a dedicated electric motor to generate required mechanical torque and power to provide required speed to the e-Rickshaw through suitable converter. This paper also emphases on the performance analysis of various components of the e-Rickshaw, namely: Battery bank, Drive system, DC motor and Battery Management System (BMS) during solar charging and without solar charging for different drive cycles. The simulation is done for various loads and speed profiles using Simulink of MATLAB.
{"title":"A Substantial Modelling and Analysis of Solar Powered e-Rickshaw Drive System","authors":"Dasaratha Sahu, P. S. R. Nayak","doi":"10.1109/SeFet48154.2021.9375651","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375651","url":null,"abstract":"The current environmental apprehensions are fascinating the world to swift towards green technology. The development of renewable energy-based equipment and machinery are increasing the approaches towards a pollution free world. In this paper, the substantial modelling and performance analysis of a solar powered electric rickshaw (e-Rickshaw) for different drive cycles is presented. The modelling of the e-Rickshaw is done as per design methodology of solar charger, battery bank, electric motor, e-Rickshaw drive train suitable for different drive cycles and different components to provide the required traction. The e-Rickshaw is having onboard solar charging system with provision of grid charging through suitable DC power plug. The battery bank supplies the power to a dedicated electric motor to generate required mechanical torque and power to provide required speed to the e-Rickshaw through suitable converter. This paper also emphases on the performance analysis of various components of the e-Rickshaw, namely: Battery bank, Drive system, DC motor and Battery Management System (BMS) during solar charging and without solar charging for different drive cycles. The simulation is done for various loads and speed profiles using Simulink of MATLAB.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134600910","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375811
M. Veerachary
A semi-quadratic Z-source type boost converter (SQZBC) exhibiting improved voltage gain is proposed in this paper. It is a two-switch based boost converter and operates with less duty ratio range (i.e. 0 to 0.5). It is able to establish highvoltage transformation ratio like the conventional quadratic boost converter but at a lower duty ratios. To achieve this, three chargepump capacitors along with two inductances are utilized in the converter formulation. An additional capacitor is used across the load to ensure constant voltage along with suppression of ripples. Principle of operation is explained for the continuous inductor current mode of operation. Steady-state analysis is performed and the converter elements design equations are formulated. Later on state-space models are formulated to quantify the proposed converter dynamic behavior and then to design suitable controller. A 36V to 100/200 V, SO W prototype SQZBC is constructed for experimental verification. Measurement results are supported with simulation results to demonstrate the proposed high gain boost converter salient features.
提出了一种具有较好电压增益的半二次z源型升压变换器(SQZBC)。它是一种基于双开关的升压转换器，工作时占空比范围较小(即0至0.5)。它能够像传统的二次升压变换器一样建立高电压转换比，但占空比较低。为了实现这一点，三个电荷泵电容器以及两个电感在变换器配方中被利用。在负载上使用一个额外的电容器，以确保恒定的电压以及抑制波纹。阐述了连续电感电流工作方式的工作原理。进行了稳态分析，建立了变换器元件的设计方程。然后建立状态空间模型来量化所提出的变换器的动态行为，进而设计合适的控制器。构建了一个36V至100/200 V, SO W原型SQZBC进行实验验证。仿真结果验证了所提出的高增益升压变换器的显著特性。
{"title":"Design and Analysis of Two-switch Semi-quadratic Z-source Type Boost Converter","authors":"M. Veerachary","doi":"10.1109/SeFet48154.2021.9375811","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375811","url":null,"abstract":"A semi-quadratic Z-source type boost converter (SQZBC) exhibiting improved voltage gain is proposed in this paper. It is a two-switch based boost converter and operates with less duty ratio range (i.e. 0 to 0.5). It is able to establish highvoltage transformation ratio like the conventional quadratic boost converter but at a lower duty ratios. To achieve this, three chargepump capacitors along with two inductances are utilized in the converter formulation. An additional capacitor is used across the load to ensure constant voltage along with suppression of ripples. Principle of operation is explained for the continuous inductor current mode of operation. Steady-state analysis is performed and the converter elements design equations are formulated. Later on state-space models are formulated to quantify the proposed converter dynamic behavior and then to design suitable controller. A 36V to 100/200 V, SO W prototype SQZBC is constructed for experimental verification. Measurement results are supported with simulation results to demonstrate the proposed high gain boost converter salient features.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115613002","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375678
Nikhil Bhati, U. Kalla
This paper presents permanent magnet brushless DC (PMBLDC) generator based Micro hydro power generation system. The micro hydro power generation scheme presented in this paper is found highly suitable for hilly and remote locations. More particularly for the villages located in the mountain areas. The different system characteristics of the permanent magnet brushless direct current generator (PMBLDCG) based power generation scheme under various operating conditions have been investigated and presented in this paper. The performance of the system is investigated with two different DC-DC converters for steady state and dynamic conditions under varying turbine speeds. The investigations on schemes are simulated on MATLAB/Simulink platform. The simulation results presented in this paper are highly useful for in-depth understanding of the PMBLDC generator based micro hydro power generation system.
{"title":"Investigations on PMBLDCG for Micro Hydro Power Generation","authors":"Nikhil Bhati, U. Kalla","doi":"10.1109/SeFet48154.2021.9375678","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375678","url":null,"abstract":"This paper presents permanent magnet brushless DC (PMBLDC) generator based Micro hydro power generation system. The micro hydro power generation scheme presented in this paper is found highly suitable for hilly and remote locations. More particularly for the villages located in the mountain areas. The different system characteristics of the permanent magnet brushless direct current generator (PMBLDCG) based power generation scheme under various operating conditions have been investigated and presented in this paper. The performance of the system is investigated with two different DC-DC converters for steady state and dynamic conditions under varying turbine speeds. The investigations on schemes are simulated on MATLAB/Simulink platform. The simulation results presented in this paper are highly useful for in-depth understanding of the PMBLDC generator based micro hydro power generation system.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115447379","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375693
Suresh Lakhimsetty, K. Shaik
This paper presents different current control techniques for a solar powered single-phase grid connected inverter in the application of distributed generation. The control techniques are Hysteresis controller, Fuzzy controller and Model predictive controller. The controllers are used to generate the switching pulses to the single-phase inverter. The control techniques are also achieves the unity power factor on the grid side with robust grid-current regulation. The control techniques are simulated with help of MATLAB/Simulink and their performance is compared by considering the current THD and switching frequency of the inverter.
{"title":"A Comparative Analysis of Current Control Strategies for a Solar based Single-Phase Grid Connected Inverter","authors":"Suresh Lakhimsetty, K. Shaik","doi":"10.1109/SeFet48154.2021.9375693","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375693","url":null,"abstract":"This paper presents different current control techniques for a solar powered single-phase grid connected inverter in the application of distributed generation. The control techniques are Hysteresis controller, Fuzzy controller and Model predictive controller. The controllers are used to generate the switching pulses to the single-phase inverter. The control techniques are also achieves the unity power factor on the grid side with robust grid-current regulation. The control techniques are simulated with help of MATLAB/Simulink and their performance is compared by considering the current THD and switching frequency of the inverter.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123330846","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375720
K. Mathuria, H. Tiwari
This paper presents the performance of the dc-dc converter with non-idealistic in active and passive components for the electric vehicle (EV) battery charging applications. The duty cycle expression is developed by analyzing the effect of non-idealistic on the converter for reducing the associated converter loss. The effect of inductor and capacitor series resistance is analyzed in detail to identifying their effects on the current and voltage ripple of the converter. Later, the analysis is validated by using MATLAB/ Simulation results.
{"title":"Effect of non-idealistic parameters on the performance of dc-dc converter for EV applications","authors":"K. Mathuria, H. Tiwari","doi":"10.1109/SeFet48154.2021.9375720","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375720","url":null,"abstract":"This paper presents the performance of the dc-dc converter with non-idealistic in active and passive components for the electric vehicle (EV) battery charging applications. The duty cycle expression is developed by analyzing the effect of non-idealistic on the converter for reducing the associated converter loss. The effect of inductor and capacitor series resistance is analyzed in detail to identifying their effects on the current and voltage ripple of the converter. Later, the analysis is validated by using MATLAB/ Simulation results.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"385 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122768759","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375688
Sanjeev Singh, Shailendra Kumar, U. Kalla, A. Chandra, M. Saad
This paper presents an optimal scheme for large deployment of single phase rooftop photovoltaic (RTPV) systems in a low voltage (LV) distribution network. A detailed investigation is carried out under three different cases for RTPV deployment at each load node as 1) fixed rating per phase; 2) rating proportional to the load at each node; 3) optimum rating obtained using an optimization algorithm. The objectives considered for the optimal selection of RTPV ratings are energy loss minimization and voltage unbalance across three phases apart from active and reactive power optimization. The RTPV systems are operated under volt-VAR control, to achieve the optimum power quality along with minimum losses. The network selected for the above study is IEEE 13 bus system so that the impact on each line and load is monitored. After analysis of the obtained results of 13 bus system, further investigation is carried out for IEEE 8500 node network to validate the proposed concepts. The obtained results are presented to demonstrate the effectiveness of optimum deployment of large number of RTPV systems in a LV distribution network to have good voltage profile and minimum energy loss under variable penetration level, load and solar irradiance.
{"title":"Optimization of Rooftop PV System Deployment for LV Distribution Network","authors":"Sanjeev Singh, Shailendra Kumar, U. Kalla, A. Chandra, M. Saad","doi":"10.1109/SeFet48154.2021.9375688","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375688","url":null,"abstract":"This paper presents an optimal scheme for large deployment of single phase rooftop photovoltaic (RTPV) systems in a low voltage (LV) distribution network. A detailed investigation is carried out under three different cases for RTPV deployment at each load node as 1) fixed rating per phase; 2) rating proportional to the load at each node; 3) optimum rating obtained using an optimization algorithm. The objectives considered for the optimal selection of RTPV ratings are energy loss minimization and voltage unbalance across three phases apart from active and reactive power optimization. The RTPV systems are operated under volt-VAR control, to achieve the optimum power quality along with minimum losses. The network selected for the above study is IEEE 13 bus system so that the impact on each line and load is monitored. After analysis of the obtained results of 13 bus system, further investigation is carried out for IEEE 8500 node network to validate the proposed concepts. The obtained results are presented to demonstrate the effectiveness of optimum deployment of large number of RTPV systems in a LV distribution network to have good voltage profile and minimum energy loss under variable penetration level, load and solar irradiance.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123946793","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}
Pub Date : 2021-01-21DOI: 10.1109/SeFet48154.2021.9375804
Ankur Srivastava, J. Seshadrinath
Grid-connected applications of renewable energy sources(solar energy) are increasing day by day. For these applications, transformers play an important role in facilitating galvanic isolation and suitable voltage ratio for interconnection between grid and inverter. However, the omitting of the transformers from the complete power conversion system becomes inevitable because of having large size/weight and cost. Hence transformerless inverters are replacing conventional inverters for grid-connected PV systems at a rapid pace. It has been observed that a transformerless grid-connected H bridge inverter established a common mode resonant circuit with the formation of parasitic capacitance between PV terminals and grounded frame and hence, consequently, leakage current induced in the system. In this paper, a mathematical model has been derived by using source transformation approach for the common-mode resonant circuit of H bridge grid-connected PV inverter, and further, it has been analyzed for both unipolar and bipolar modulation strategies. Finally, a 1kW grid-connected single-phase H bridge PV inverter has been simulated on Matlab and verified with satisfactory results.
{"title":"Common Mode Leakage Current Analysis of 1ϕ Grid-Tied Transformer Less H-Bridge PV Inverter","authors":"Ankur Srivastava, J. Seshadrinath","doi":"10.1109/SeFet48154.2021.9375804","DOIUrl":"https://doi.org/10.1109/SeFet48154.2021.9375804","url":null,"abstract":"Grid-connected applications of renewable energy sources(solar energy) are increasing day by day. For these applications, transformers play an important role in facilitating galvanic isolation and suitable voltage ratio for interconnection between grid and inverter. However, the omitting of the transformers from the complete power conversion system becomes inevitable because of having large size/weight and cost. Hence transformerless inverters are replacing conventional inverters for grid-connected PV systems at a rapid pace. It has been observed that a transformerless grid-connected H bridge inverter established a common mode resonant circuit with the formation of parasitic capacitance between PV terminals and grounded frame and hence, consequently, leakage current induced in the system. In this paper, a mathematical model has been derived by using source transformation approach for the common-mode resonant circuit of H bridge grid-connected PV inverter, and further, it has been analyzed for both unipolar and bipolar modulation strategies. Finally, a 1kW grid-connected single-phase H bridge PV inverter has been simulated on Matlab and verified with satisfactory results.","PeriodicalId":232560,"journal":{"name":"2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124109813","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}
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