Browsing by Author "Udaykumar, R.Y."

Now showing 1 - 20 of 25

An algorithm for optimal phase balancing of secondary distribution systems at each node
(2016) Swapna, M.; Udaykumar, R.Y.
In this paper, a phase balancing algorithm is developed to balance the load at each candidate node of the secondary distribution network from tail end of the feeder by rearranging the connections of consumer load/ service laterals. Phase balancing is a concept of re-phasing service laterals such that load on three phases is balanced. The algorithm is designed to handle three, two and single phase time varying loads with an objective of loss reduction and minimum number of phase moves. To evaluate the performance of proposed algorithm, it is applied to the IEEE 13 node test feeder. The simulation results confirm the efficiency of algorithm for reduction of power loss and phase balancing of secondary distribution network with minimum number of phase moves. � 2016 IEEE.
Architectural framework of on-board integrator: An interface for grid connected EV
(2017) Kumar, S.; Likassa, K.; Ayenew, E.; Sandeep, N.; Udaykumar, R.Y.
Vehicle to Grid (V2G) is the concept of connecting a group of electric vehicles (EV) to the grid for power transaction. EVs can be connected to the grid through the home interface or through the chargers available at charging stations. In this paper, a single phase on-board charger with low complexity control scheme is proposed for EV power transaction. The power flow from and to the grid is processed using two stage cascaded converters consisting of a bidirectional DC-DC and DC-AC converters. The LCL filter is used as an interface between DC-AC converter and the grid to attenuate the grid current harmonics. A proportional resonant (PR) controller is employed for the control of grid current and to enable the unity power factor operation of the DC-AC converter. The setbacks associated with the conventional proportional-integral (PI) controller for single phase system is elevated by employing PR controller. Filter design guidelines and the control strategy developed for the proposed system is numerically simulated and verified with extensive simulation carried using MATLAB/SIMULINK. The results demonstrating the feasibility and viability of the proposed system are presented. � 2017 IEEE.
A comparison of seven-level inverter topologies for multilevel DC-AC power conversion
(2014) Salodkar, P.; Sandeep, N.; Kulkarni, P.S.; Udaykumar, R.Y.
Multilevel inverter (MLI) performance is high compared to the conventional two level inverters since they offer high power capability, associated with lower output harmonics and lower commutation losses. However the main drawback of MLI is their increased number of power devices, passive components, complex pulse width modulation control and balancing of capacitor voltages. In this paper the most popular topologies like diode-clamped inverter (neutral-point clamped), cascaded multicell with separate dc sources, and transistor clamped H-Bridge inverter are discussed. A simplified multilevel inverter (Switched Transistor MLI) is proposed and its performance is compared with the above said topologies. Component count and the % total harmonic distortion (THD) of the output voltage are considered as the indexes of the comparative performance. The operating principle of each topology, the most relevant modulation method of all the topologies and the detailed analysis of the proposed Switched Transistor MLI is included. The selection of topology and control techniques depends and varies according to power demands of inverter. Simulation study of all the topologies considered is carried out on MATLAB/SIMULINK platform and the performance of the proposed topology is verified experimentally by the tests performed on a scaled laboratory prototype. � 2014 IEEE.
Design and implementation of FPGA based low power digital PID controllers
(2009) Sreenivasappa, B.V.; Udaykumar, R.Y.
In this paper design and implementation of low power Proportional Integral Derivative (PID) controller using Field Programmable Gate Array (FPGA) is presented. In the present status the embedded control applications requires low power and fast acting PID controllers with a closed loop performance using less resources, resulting in cost reduction. Different types of digital PID controllers are analyzed with the frequency response using Matlab tool. The controller algorithm is synthesized, simulated and implemented using Xilinx Spartan3e XC3S100E board with XilinxISE 9.1i as a tool and synthesized and simulated using Altera Cyclone EP1C12Q240C8 with Quartus II 6.1 as a tool. The results are compared in terms of their power consumption, speed, memory usage, Look Up Tables (LUTs) and number of Multipliers, Adders/Subtractors. �2009 IEEE.
Development of WSN system for precision agriculture
(2015) Santoshkumar; Udaykumar, R.Y.
The agriculture sector is changing rapidly pointing to the future of automated and embedded systems with an array of sensors to monitor and control the growing plants in a way to protect workers, the environment and profits associated with it. The continuous monitoring and controlling of distantly located plants is labour intensive and technically challenging business. In modern precision agriculture, a Wireless Sensor Network (WSN) provides a simple cost effective solution to monitor and control. The basic parameters to be monitored are temperature and humidity (moisture content in the soil). A smart low cost WSN system for precision agriculture is proposed for monitoring and control using open software and electronic prototype - ARDUINO. � 2015 IEEE.
Electrical energy conservation in India - Challenges and achievements
(2009) Kamalapur, G.D.; Udaykumar, R.Y.
The gap between electrical energy supply and demand is continuously increasing despite huge outlay for energy sector since independence. This gap between supply and demand of energy can be bridged with the help of energy conservation which is considered as a new source of energy and envinronmental friendly. The energy conservation is cost effective with a short pay back period and modest investment. There is a good scope of energy conservation in various sectors, viz domestic, industry, agriculture. The planners have already started appreciating the role and significance of energy conservation in future energy scenario of India. An attempt is made in this paper to acess the achievements and further challenges of electrical energy conservation in Indian context.
Electrification in rural areas of India and consideration of SHS
(2010) Kamalapur, G.D.; Udaykumar, R.Y.
Rural electrification is an integral component of poverty alleviation and rural growth of a nation. In India, electricity has not played effective role in the socio-economic growth of village. Government of India has ambitious target of providing electricity to all villages by 2008 and all rural households by 2012. Steps are initiated with Rural Electric Corporation, State Electricity Boards, Reforms in Power sector. Ever increasing demand of electrical energy is causing a large gap in generation and load demand. All the requirement of energy cannot be fully met with conventional grid supply so, an alternative energy source has to be found out for this purpose. Therefore it has become necessary to explore the applications of distributed energy sources which are inevitable to meet the energy requirements. An attempt has been made in this paper to assess the features of rural electrification in India and a simple cost comparison of Solar Home Systems (SHS) with grid supply in deep rural areas. �2010 IEEE.
FPGA based control model with derivative filter for converter
(2010) Sreenivasappa, B.V.; Udaykumar, R.Y.; Beig, A.R.
In this paper, the control model for a digitally controlled DC-DC converter is presented along with derivative filter. The digital implementation of this model gives the detailed description about the gain and phase responses of each block in the digital controller loop. Key problems such as quantization resolution of digital pulse width modulator (DPWM), steady state limit cycle oscillations and loop delay of the controller are discussed and solutions are presented. The controller is implemented in an altera Quartus II 9.0 tool and simulated with an inbuilt simulator. It is observed that the controller utilizes less resource and consumes less power, means that the controller cost can be reduced. �2010 IEEE.
GEV Aggregator Placement in Distribution Network Using 802.16 Protocol
(2018) Kumar, S.; Lakshmi, M.S.; Afeta, A.T.; Udaykumar, R.Y.
Vehicle to Grid (V2G) is a viable solution to meet the grid requirements with present developments in electric vehicle (EV) technology and power grid. In this paper wireless access infrastructure for optimal placement of EV aggregator in power distribution network is proposed using Worldwide Interoperability for Microwave Access (WiMAX) or 802.16 protocol. The load flow studies were carried out for IEEE 14 bus system and the physical layer of WiMAX protocol was modeled and simulated using MATLAB/SIMULINK. The results demonstrate that timely placement of GEV aggregator will result in substantial reduction of active power loss. � 2017 IEEE.
GEV Aggregator Placement in Distribution Network Using 802.16 Protocol
(Institute of Electrical and Electronics Engineers Inc., 2018) Hampannavar, S.; Lakshmi, M.S.; Teshale, A.T.; Udaykumar, R.Y.
Vehicle to Grid (V2G) is a viable solution to meet the grid requirements with present developments in electric vehicle (EV) technology and power grid. In this paper wireless access infrastructure for optimal placement of EV aggregator in power distribution network is proposed using Worldwide Interoperability for Microwave Access (WiMAX) or 802.16 protocol. The load flow studies were carried out for IEEE 14 bus system and the physical layer of WiMAX protocol was modeled and simulated using MATLAB/SIMULINK. The results demonstrate that timely placement of GEV aggregator will result in substantial reduction of active power loss. Â© 2017 IEEE.
IEEE 802.16-2004(WiMAX) protocol for grid control center and aggregator communication in V2G for smart grid application
(2013) Kumar, S.; Udaykumar, R.Y.
The Vehicle to grid (V2G) has become a reality with the developments in power grid and electrical vehicle technology. The V2G acts as a source and can be connected to the grid for shaving peak. The information and communication technology (ICT) will play a key role in V2G communications in smart grid environment. The aggregator acts as an interface between the grid control center and electrical vehicles. The communication between grid control center and aggregator is crucial and it is the responsibility of the aggregator to mobilize the electrical vehicles and facilitate the EV's to get connected to the grid by providing them the required parking slot for the EV's based on the state of the battery. In this paper we have analyzed the performance of IEEE 802.16-2004 for grid control center and aggregator communication. The IEEE 802.16-2004 physical layer modeling is performed using MATLAB/SIMULINK. � 2013 IEEE.
Long term evolution protocol for grid control center to aggregator communication in V2G for smart grid application
(2015) Kumar, S.; Udaykumar, R.Y.
The Vehicle-to-Grid (V2G) concept has become a reality with developments in the power grid and vehicle technology. The electrical vehicle (EV) can be connected to the grid to contribute power and help in maintaining the grid stability for shorter duration of time. The communication between the grid control center (GCC) and Aggregator is very crucial as GCC sends the power requirement details to the aggregator. In this paper we propose Long Term Evolution (LTE) protocol for GCC to Aggregator communication in V2G. The physical layer of LTE protocol is modeled using MATLAB/SIMULINK and its performance is investigated. � 2014 IEEE.
Markov chain based stochastic model of electric vehicle parking lot occupancy in vehicle-to-grid
(2016) Kumar, S.; Udaykumar, R.Y.
The concept of connecting group of electric vehicles (EVs) to the grid for power transaction is known as Vehicle-to-Grid (V2G). The EVs can be connected to the grid through V2G integrators and charging slots. The arrival of EVs in parking lot is time varying and random in nature and facilitating them to participate in power transaction is challenging and aggregator's responsibility. In this paper, development of Markov chain based stochastic model of Electric Vehicle Parking Lot (EVPL) occupancy is proposed. A developed model is simulated using MATLAB and the results are presented. � 2015 IEEE.
Modelling and performance analysis of a wind/diesel hybrid power system
(2006) Kini, A.S.; Udaykumar, R.Y.
Domestic consumers in the remote places who are not connected by the main electrical grid network, hybrid systems such as wind/diesel generators have been considered as the most reliable, preferred and attractive alternative source of power supply. This paper presents the modeling and performance analysis of wind/diesel hybrid generating system. To regulate the frequency and voltage output of the wind generator, an AC-DC-AC scheme using SPWM technique is employed. The system is simulated for different wind speed and load conditions using EMTDC/PSCAD software. � 2006 IEEE.
A new nine-level single-DC source-based inverter topology for distributed generation
(2017) Sandeep, N.; Udaykumar, R.Y.
Multilevel inverter enables to completely remove the passive filtering requirement at the grid interfacing end, resulting in improved efficiency and reduced cost. These features have led to increasing attention towards their application to medium and high-power arena. In this paper, investigation of a hybrid 9-level inverter topology for grid integration of renewable energy sources is presented. The structural details, operating principle, capacitor voltage balancing control and the main features of the proposed inverter are presented. The proposed topology is compared with other similar 9-level converters to emphasize its superior characteristics and performance. Simulation results demonstrating the grid connected operation of the converter for two test cases are presented. The results affirm the effectiveness of the capacitor voltage balancing control in maintaining capacitor voltages at set values, under steady state and transient operation of the converter. � 2016 IEEE.
On-board Vehicle-to-Grid (V2G) integrator for power transaction in smart grid environment
(2015) Koduri, N.; Kumar, S.; Udaykumar, R.Y.
The growing oil demands and the economic concerns have inspired the governments, car manufactures and the environmentalist to promote the manufacturing of Electrical Vehicles (EV). With developments in the power grid and advancements in the vehicle technology the EVs can contribute to the grid by selling or buying power from the grid. For the effective and efficient use of the V2G there is a major scope to develop the V2G integrators like On-Board and Off-Board. In this paper the On-Board V2G integrator is proposed and is modeled using MATLAB/SIMULINK. The conversion efficiency of 90% is obtained and the benefits of V2G are listed. � 2014 IEEE.
People's participation in rural electrification -A successful case
(2008) Kamalapur, G.D.; Udaykumar, R.Y.; Karajgi, S.B.
Rural electrification is an integral component of poverty alleviation and rural growth of a nation. A developing nation, like India has 72.2 percent people living in rural areas. Still, electricity has not played an effective role in the socioeconomic growth of villages .The Government of India has an ambitious target of providing electricity to all villages by 2008 and all rural households by 2012. Steps are already initiated with Rural Electric Corporation, Rural Electricity Supply Technology Mission, State Electricity Boards led reforms, Reforms in Power Sector, Electricity Act 2003,etc. An attempt has been made in this paper to assess the present status of rural electrification in India and the major factors contributing to rural electrical distribution. Steps initiated by the Government of India through Rural Electric Corporation (REC) and a successful case study of the people's participation model is presented. � 2008 IEEE.
Performance investigation of mobile WiMAX protocol for aggregator and electrical vehicle communication in Vehicle-to-Grid(V2G)
(2014) Santoshkumar; Udaykumar, R.Y.
With the developments in smart power grid and electrical vehicle technology the Vehicle-to-Grid (V2G) has become reality. The V2G plays a prominent role in meeting the load demands either peak shaving or valley filling in power management. The aggregator acts as an interface between the power grid and electrical vehicles and communication between them plays a key role. The mobile WiMAX(Worldwide Interoperability for Microwave Access) 802.16e is proposed as a communication protocol for aggregator and electrical vehicle communication. The path loss models are compared and simulation of WiMAX 802.16e physical layer is carried out using MATLAB and its performance is investigated. � 2014 IEEE.
Power management of a hybrid PEMFC-PV and ultracapacitor for stand-alone and grid connected applications
(2012) Naik, A.; Udaykumar, R.Y.; Kole, V.
This paper presents the integration of photovoltaic (PV), fuel cell (FC) and energy storage systems for reliable power generation. In this system FC is used as main power source and power from PV whenever available is harvested completely with storage system compensating for power fluctuations. This topology has high efficiency, modularity and fuel flexibility. The sources in this hybrid system complement each other very well against environmental variations and load variations. Of the many storage systems the use of ultracapacitor gives advantage of absorbing and contributing to power transients quickly and efficiently. The aim of this study is to design an effective power management system for PV/FC/storage hybrid system thus to give high quality reliable power. MPPT for PV system is used for maximum power extraction. Finally the structure of hybrid system with control strategies for power management is discussed. The proposed hybrid system is modeled, simulated and verified by MATLAB/Simulink simulations for standalone and grid connected systems. � 2012 IEEE.
Rural electrification in India and pre-sizing of solar home systems
(2014) Kamalapur, G.D.; Udaykumar, R.Y.
There is a wide gap between the demand and supply of electrical energy. Far away rural areas are having dispersed loads in nature and hence increased transmission and distribution losses. Thus increasing electrical demand drives the attention towards available and feasible choices of distributed generation. India being a tropical country, solar is the natural choice of sustainable alternative. An attempt has been made in this paper to assess the issues of rural electrification India and presizing of distributed solar generation. � 2014 IEEE.