Modelling farm-based electric vehicles on charging systems for power distribution networks with dynamic grid interactions Ramu Srikakulapu, Vivekanandan Subburaj, S. Sujith, Mohammad Shahid, Javed Khan Bhutto, G. Charan kumar, Abhishek Dasore, Abdul Razak, C. Ahamed Saleel Ain Shams Engineering Journal, 2023 This paper provides the capability with a control topology for low voltage distribution network to satisfy sudden peak load demand by designing a system. Develop the electric vehicle (EV) farm accumulated based on the charging system for voltage regulation at a distribution node for transmitting power to the grid from EVs by a control vehicle-to-grid operation. Also, this paper concerns with modelling of an EV system with dynamic interaction with grid integrated with major classifications from the state of charge (SOC). In EV farm, four various EV profiles were considered to understand the grid integration and supply the sudden peak load demand. The EV farm integration with the grid was observed by modelling an equivalent system in MATLAB/Simulink.
Control of Interfaced Converters with Various Levels of PV Penetration into the Grid: A Case Study Ramu Srikakulapu, G Sanjay Kumar, P Joanna Parimala, G Charan Kumar International Conference on Trends in Electrical Electronics Computer Engineering Teeccon 2022, 2022 The regulation of interfaced converters with the integration of renewable energy sources (RESs) into the power grid with penetration effect is the subject of this article. Various amounts of RES penetration into the grid are used to present a suitable outcome of this investigation. The simulation findings for grid integration with varying levels of PV penetration are presented. A maximum PV penetration of 50% of peak demand is modelled, with a minimum of 10%. This project examines a variety of faults, including symmetrical and unsymmetrical faults. Two controllers are employed in the control process, one for boost converter with maximum power point tracking and the other for VSC controller. The VSC controller regulates the DC voltage. Inner and outer loops exist in the VSC controller. The current is controlled by the inner loop, while the DC voltage is controlled by the outside loop. With these future scenarios in mind, this paper presents existing solutions as well as new and future options to solve these concerns.
MHD Heat and Mass Transfer Steady Flow of a Convective Fluid Through a Porous Plate in The Presence of Diffusion Thermo and Aligned Magnetic Field Obulesu Mopuri, Raghunath Kodi, Charankumar Ganteda, Ramu Srikakulapu, Giulio Lorenzini Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 2022 In the presence of a diffusion thermal and coupled magnet field effect, this manuscript seeks continuous free convective motion by a viscous, incompressible fluid that conducts electrically past a sloping platform via a porous medium. The free flow speed may be compatible with the exponentially tiny disrupting law. Two-term harmonic and non-harmonic functions solve dimensional-less control equations analytically. Detailed graphs are used to determine the budgets for tempo, temperature, and concentration for various limit calculations. Also, the numbers of Nusselt and Sherwood are given and evaluated with the graphs. Its sketches illustrate that the velocity profiles get reduced by the increase of aligned magnetic field parameter (α) and inclined angle parameter (ξ). Temperature profile is accelerated by rising heat absorption, Dufour number and concentration distribution is decelerated by enhancing the chemical reaction and Schmidt number. Heat and mass transfer frequently occurs in chemically processed industries, distribution of temperature and moisture over agricultural fields, dispersion of fog and environment pollution and polymer production. Free convection flow of coupled heat and mass transfer occurs due to the temperature and concentration differences in the fluid as a result of driving forces. For example, in atmospheric flows, thermal convection resulting from heating of the earth by sunlight is affected differences in water vapour concentration.
Architecture Design of Electric Vehicle Parking Lot Sanjay Kumar G, Leela Grace U, Ramu Srikakulapu, Poojasree M, Latha V, Charan Kumar G International Conference on Trends in Electrical Electronics Computer Engineering Teeccon 2022, 2022 This paper provides different challenges for Electric Vehicle parking (EVP) in parking lots (PL) along with different parking architectures for proper placing of Electric vehicle (EV) in the PL that would result in Optimised charging conditions for EV in the PL along with the considerations of PL Space optimization, Time Optimization with the help of angled parking slot to adjust the parking slots to certain angle for fast parking and unparking of vehicles, Driver Preferences regarding location of slot in the parking lot that could result in drivers satisfaction keeping Initial cost concerns for power electronic circuitry in mind. This study also includes engineering extensions for existing PL designs of Conventional fuel Vehicles (CFV) that could make the parking lot feasible for EV charging in the parking lots. In this study different designs are proposed like spiral parking lots which could enable vehicles to park on different flowers, also include the case study of using Pythagorean theorem for creating few more spaces in the parking lot, mobile EV charger also proposed to establish temporary PLs in demand prone areas.
A Universal Converter for Different Power Conversion Operations and High Power Applications K Suresh, K Jyotheeswara Reddy, Ritesh Dash, Santoshkumar Hampannavar, Ramu Srikakulapu, Vivekanandan Subburaj Proceedings of the Energy Conversion Congress and Exposition Asia Ecce Asia 2021, 2021 A newly designed universal converter proposes a new approach for power conversion (AC-DC, AC-AC, DC-DC, and DC-AC) using a single circuit. In this work, four topologies are considered simultaneously in a single circuit without changing the circuit design. The topologies of buck and boost operation work on the general topology operation i.e., using an inductor and two capacitors whereas remaining AC-AC, AC-DC and DC-AC conversions work using capacitors and switches. The proposed converter is highly recommended for multiple sources and multiple output operations. Different power ratings can be selected for different topologies for DC-DC or DC-AC conversion it varies from 1 Watt to 10 kW and AC-AC or AC-DC conversion 1 Watt to 10 MW. The Simulation is performed for the universal converter using MATLAB/SIMULINK. The simulation and the model results show good agreement with each other.
Stability analysis and a hybrid controller design of grid-connected offshore wind farm through a VSC-HVDC transmission link Ramu Srikakulapu, Vinatha U Asian Journal of Control, 2019 Abstract This paper proposes a hybrid controller which is a combination sliding mode control and PI control techniques for AC grid integrated offshore wind farm (OSWF) with voltage source converter ‐ high voltage direct current system. The controller must be capable of controlling AC voltage, DC‐link voltage, reactive power and effective power transfer. To examine the FRT capability, a symmetrical fault is applied at onshore AC grid side and compared the performances of the studied system based on the hybrid and PI controllers. The dynamic modelling and linearized system by state‐space modelling for the studied system are explained in detail. The small signal stability analysis and controller stability are observed with the help of the eigenvalue analysis. The analysis of the studied system with a hybrid and conventional controllers are conducted in the software environment of the MATLAB/SIMULINK . The effect of parameter uncertainty on total system stability is examined with the help of eigenmatrix of the studied system.
Optimized design of collector topology for offshore wind farm based on ant colony optimization with multiple travelling salesman problem Ramu SRIKAKULAPU, Vinatha U Journal of Modern Power Systems and Clean Energy, 2018 A layout of the offshore wind farm (OSWF) plays a vital role in its capital cost of installation. One of the major contributions in the installation cost is electrical collector system (ECS). ECS includes: submarine cables, number of wind turbines (WTs), offshore platforms etc. By considering the above mentioned problem having an optimized design of OSWF provides the better feasibility in terms of economic considerations. This paper explains the methodology for optimized designing of ECS. The proposed methodology is based on combined elitist ant colony optimization and multiple travelling salesman problem. The objective is to minimize the length of submarine cable connected between WTs and to minimize the wake loss in the wind farm in order to reduce the cost of cable and cable power loss. The methodology is applied on North Hoyle and Horns Rev OSWFs connected with 30 and 80 WTs respectively and the results are presented.
Design of a hybrid controller based on GA-SMC for the multi-terminal VSC-HVDC transmission system Ramu Srikakulapu, U. Vinatha 2018 2nd IEEE International Conference on Power Electronics Intelligent Control and Energy Systems Icpeices 2018, 2018 This paper explains a hybrid control approach to model a controller for voltage source converters (VSCs) in offshore wind farm (OSWF) applications, where the OSWFs are integrated to AC grid through the multi-terminal high voltage direct current (MT-HVDC) transmission system. Proper DC link voltage provides the effective power dispatch. So, a constant DC link voltage should be maintained to achieve the effective power dispatch between OSWFs and AC grid. A new control approach is a compound of proportional-integral and sliding mode control to regulate the DC link voltage on the grid side VSC. Also, the proposed control approach can control AC voltage and reactive power on wind farm and grid side VSCs respectively. Time- domain simulations executed in MATLAB/Simulink software are used to verify the proposed and conventional control approaches. Transient stability analysis is carried out for a case study. The three-terminal VSC-HVDC system has taken for study, where two OSWFs are fed to AC grid.
Combined approach based on ACO with MTSP for optimal internal electrical system design of large offshore wind farm Ramu Srikakulapu, U Vinatha Proceedings of 2018 IEEE International Conference on Power Instrumentation Control and Computing Picc 2018, 2018 The wind turbine (WT) layout and electrical system layout plays a vital role in offshore wind farm (OWF) design. The wake effect has a significant impact on the power production of the OWF. WTs in wake region will not experience healthy wind; hence it affects the power production. The proper placement of WTs can reduce the wake effect in OWF. The optimal design of large OWF is based on combined approach of Ant colony optimization (ACO) with multiple travelling salesmen problem (MTSP) is presented. The objectives of the approach are to improve power production, minimize the length of cable and cable cost. By considering (a) placement of WT with consideration of wake effect, (b) placement of substation, (c) selection of submarine cables with higher reliability and minimal power loss, and (d) minimum length of WT cable routing with zero cross connection. ACO-MTSP approach is applied on large OWF connected with 280 WTs and results are compared with the outcome of reference OWF.
