D.P. Kothari

D.P. Kothari
Indian Institute of Technology Delhi | IIT Delhi · Centre for Energy Studies

B.E., M.E,Ph D ALL FROM BITS PILANI IN 1967,1969. 1975 RESPECTIVELY

About

345
Publications
111,244
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
12,244
Citations

Publications

Publications (345)
Article
This paper proposes a novel chaotic-crisscross differential evolution (CCDE) algorithm to realize an optimal generation schedule of multi-chain short-term hydrothermal system over 24 hours’ time-horizon in a multi-objective framework, considering conflicting economic-environmental aspects of thermal units. The equality constraints of active power b...
Article
Full-text available
This paper proposes a fair calculation approach for the cost and emission of generators. Generators also have reactive power requirements along with the active power demand to meet up the total power demand. In this paper, firstly the reactive power is calculated considering the random active power operating points on the capability curve of a gene...
Article
In this paper Particle swarm optimization (PSO) algorithm has been applied to solve Optimal Power Flow (OPF) problem (OPFP). The proposed work has been examined and tested on IEEE-9 bus system with six different objectives based on fuel cost, Transmission losses and Voltage profile improvement. The results drawn show its validity and effectiveness.
Article
The environmental concerns and shortage in conventional energy has paved the way for utilizing renewable energy resources like photovoltaic energy (PV). As the grid is becoming smarter, the complexity associated with the conventional power system network has gone up with increased renewable energy penetration. Safety factor and reliable interconnec...
Article
This paper deals with a non-interactive approach to solve multi-objective thermal power load dispatch (MTPLD), where either decision maker is not involved or preference information is available in prior. To reduce the computational complexities due to generation of Pareto-front and selection of satisficing solution, this paper adopts no-preference...
Article
This paper presents an adaptive predator-prey optimization (APPO) to solve multiobjective thermal power dispatch problem considering objectives of operating cost and pollutant emission. In APPO the fear factor from a predator is a function of cognitive and social behavior of prey. It ensures continuous mobility (magnitude and direction) of prey, re...
Chapter
Full-text available
Knowledge assets (KAs) are the main focus for knowledge management as these are considered most valuable in this knowledge-driven economy. However, the tasks of understanding, valuation, and management of knowledge assets have been daunting in contrast to their physical counterparts. There have been no generally agreed frameworks for carrying out t...
Article
The multi-objective thermal power dispatch (MTPLD) problem allocates power demand among the committed generating units while minimizing the operating cost and pollutant's emission objectives simultaneously, subject to physical and technological constraints. The success to find MTPLD solution relies on the decision-maker's ability to select compromi...
Article
Full-text available
Modern economies run on the backbone of electricity as one of major factors behind industrial development. India is endowed with plenty of natural resources and the majority of electricity within the country is generated from thermal and hydro-electric plants. A few nuclear plants assist in meeting the national requirements for electricity but stil...
Article
Full-text available
In this work, a chaotic differential evolutionary and Powell’s pattern search (CDEPS) algorithm is proposed to solve multi-objective thermal power load dispatch (MTPLD) problem. The chaotic differential evolutionary method is responsible for the diversification, and Powell’s pattern search is dedicated to exploitation. Further, the performance of t...
Article
This paper presents a novel hybrid optimization algorithm for optimizing the Distributed Generation (DG) parameters in deregulated power system which improves the stability, reduces the losses and also increases the cost of generation. This Hybrid algorithm which includes Fuzzy-Genetic Algorithm (FGA) is used to optimize the various DG parameters s...
Article
This paper introduces a synergic predator-prey optimization (SPPO) algorithm to solve economic load dispatch (ELD) problem for thermal units with practical aspects. The basic PPO model comprises prey and predator as essential components. SPPO uses collaborative decision for movement and direction of prey and maintains diversity in the swarm due to...
Chapter
The utilization of distorting loads has been increasing exponentially, which results power quality issues in electrical power systems. Transmission of the pollution free power is an important task for power engineers. Power quality issues may affect on end user equipment like electronic goods, digital meters etc. which results the spoilage of produ...
Chapter
Full-text available
From a strategic point of view, the most valuable assets in the present era are knowledge assets. Effective management of knowledge assets is essential to use existing knowledge bases as well as to create new knowledge bases by knowledge workers. Therefore, knowledge assets and knowledge workers are crucial aspects of any Knowledge Management (KM)...
Conference Paper
Full-text available
Knowledge assets (KAs) are the main focus for knowledge management as these are considered most valuable in this knowledge-driven economy. However, the tasks of understanding, valuation and management of knowledge assets have been daunting in contrast their physical counterparts. There have been no generally agreed frameworks for carrying out the a...
Article
Full-text available
The power-performance trade-off is one of the major considerations in micro-architecture design. Pipelined architecture has brought a radical change in the design to capitalize on the parallel operation of various functional blocks involved in the instruction execution process, which is widely used in all modern processors. Pipeline introduces the...
Conference Paper
Full-text available
In a deregulated market environment, the calculation of market power is one of the top priorities of the bodies involved in the market. The bodies generally involved such as the Generation companies (GENCOs), Distribution companies (DISCOs) look towards maximizing profit whereas the RTO/ISOs look to attain a zero market power environment. In this p...
Conference Paper
Full-text available
From a strategic point of view, the most valuable assets in the present era are knowledge assets. Effective management of knowledge assets is essential to use existing knowledge as well as to create new knowledge by knowledge workers. Therefore, knowledge assets and knowledge workers are most crucial aspects of any Knowledge Management (KM) Framewo...
Article
In the past few decades, restructuring has overtaken all possible domains including the electric supply industry. Restructuring has brought about considerable changes by the virtue of which electricity is now a commodity and has converted into deregulated one. Such a competitive market has paved way for innumerable participants. This has led to ove...
Article
The non-conventional resources like sun and wind are never-ending, reliable and pollution less sources of power. When such limited size renewable sources situated close to load centers are used for generating power, they are termed as distributed energy resources (DER) or Distributed Generation (DG). After the Kyoto protocol on climate change there...
Conference Paper
The introduction of Distributed Generation (DG) devices for power system improves the stability, reduction in losses and increase in the cost of generation. In this paper Simulated Annealing (SA) is used to optimize the various parameters in IEEE 33 bus radial distribution system. Expenditure of losses and savings are also estimated. Load flow anal...
Article
In this paper, a regulation band based digital voltage control scheme is proposed and key design and implementation fssues are discussed. In the proposed scheme, a hysteretic selector is designed to monitor the DC bus voltage in the voltage feedback path of the converter system. The selector algorithm decides switching between large bandwidth and n...
Article
The controllers in Power Factor Corrected (PFC) converters are conventionally designed in frequency or time domain using linearized model of the converter system. These controllers are not always adequate for PFC converters due to presence of hard nonlinearity in the system. Theoretically, linear feedback designs can only ensure stability and satis...
Chapter
Assessment of market power becomes an important issue when more than one firm/supplier and buyer enters the market. As the electricity market has moved from the conventional bundled system to the deregulated environment, the market power assessment has become vital. Most of the researchers have used Herfindahl-Hirschman Index (HHI) and must-run sha...
Article
The power-performance trade-off is one of the major considerations in micro-architecture design. Pipelined architecture has brought a radical change in the design to capitalize on the parallel operation of various functional blocks involved in the instruction execution process, which is widely used in all modern processors. Pipeline introduces the...
Article
This paper presents a novel integration technique for optimal network reconfiguration and distributed generation (DG) placement in distribution system with an objective of power loss minimization and voltage stability enhancement. Fireworks Algorithm (FWA) is used to simultaneously reconfigure and allocate optimal DG units in a distribution network...
Article
This paper presents best weight pattern evaluation approach to solve short-term multi-objective hydrothermal generation scheduling (HTGS) which determines the allocation of power demand among the committed generating units, to minimize operating cost and minimal impacts on environment subjected to physical and technological constraints. A multi-cha...
Article
The introduction of Distributed Generation (DG) devices for power system increases the stability, reduction in losses and increase in the cost of generation. In this paper Micro Genetic Algorithm (MGA) a non conventional optimization technique is used to optimize the various parameters. The various parameters taken into consideration are their type...
Article
Paper presents predator–prey based optimization (PPO) technique to obtain optimal generation scheduling of short-term hydrothermal system. PPO is a part of the swarm intelligence family and is capable to solve large scale non-linear optimization problems. PPO based algorithm combines the idea of particle swarm optimization concept with predator eff...
Article
Full-text available
Nowadays, multi-core processor is the main technology used in desktop PCs, laptop computers and mobile hardware platforms. As the number of cores on a chip keeps increasing, it adds up the complexity and impacts more on both power and performance of a processor. In multi-processors, the number of cores and various parameters, such as issue-width, n...
Article
The study and development of chip multi-processors (CMPs) are of utmost importance for the creation of future technologies. Devising a theoretical analysis of the micro-architecture model for the power/performance on CMPs is still a challenge. This paper addresses this problem by (1) introducing an analytical model for measuring the power and perfo...
Article
Fuel cells are considered as one of the most promising devices for standalone/grid connected distributed generations due to its cleanliness, modularity and higher potential capability. In the present energy scenario, Fuel cells combined with other renewable technologies are gaining attraction. This paper focuses on the combination of Fuel Cell (FC)...
Article
In this paper, different Distribution Static Compensators (DSTATCOMs) topologies, state of the art, their performance, design considerations, future developments, and potential applications are investigated for power quality improvement. These DSTATCOMs for three-phase three-wire systems and three-phase four-wire systems are developed and installed...
Conference Paper
Full-text available
The scope and significance of learning is increasingly being seen beyond its traditional context in educational institutions such as universities. Now learning is an integral part of organizational development process for all sectors including business, industry and government. Project-based learning, on-job training, online education/training and...
Conference Paper
Full-text available
Cloud computing represents a paradigm shift - a transition from computing-as-a-product to computing-as-aservice. It can be applied to a range of areas, including ecommerce, health, education, communities, etc which are emerging as the important sectors in today's market. Day-byday more knowledge is added to the internet and is shared amongst the us...
Article
This study proposes introduction of advanced power system configuration for enhancing the efficacy of clean energy mechanism and to ensure reduction in adverse impact on climate. There is increasing scientific evidence showing that burning of fossil fuels are altering the earth's climate, because combustion of fossil fuels produces green house gase...
Article
Integration of Distributed Energy Resources
Conference Paper
Full-text available
Cloud computing represents a paradigm shift - a transition from computing-as-a-product to computing-as-a service. It can be applied to a range of areas, including ecommerce, health, education, communities, etc which are emerging as the important sectors in today’s market. Day-by day more knowledge is added to the internet and is shared amongst the...
Article
In this paper, a new Modified Bacterial Foraging Algorithm (MBFA) method is developed to incor-porate FACTS devices in optimal power flow (OPF) problem. This method can provide an enhanced economic solution with the use of controllable FACTS devices. Two types of FACTS devices, thyris-tor controlled series compensators (TCSC) and Static VAR Compens...
Article
This paper presents a solution technique for combined emission constrained unit commitment problem (UCP) . The emission level is taken as a constraint in both the selection of units for generation and also in dispatching the real power among the committed units. The multi objective problem is converted into a single objective using max price penalt...
Article
Full-text available
This Study proposes the feasibility of proposed restructured power system for the integration of distributed energy resources. Once the proposed power system network takes place, it will be able to provide opportunities for sustained economic growth. Main objectives of the proposed network are maximization of Distributed Generation (DGs) penetratio...
Article
In power system studies, congestion in transmission lines and utilization of flexible alternating current transmission system (FACTS) devices are closely associated. These devices are very important due to their role in power delivery system enhancement. It is to be noted that the generation companies can exercise their market power which depends o...
Article
Experts share their views on how renewable energy technologies (RET) for cooking are transforming lives in rural areas in India. A few villages in India have adopted the use of RETs for cooking to address this problem, but the real impact of these technologies on the lives of rural people needs to be explored more extensively. Experts compares two...
Article
This paper presents the comparison between various numerical methods namely Euler's Method, Midpoint Method, 2nd order Runge Kutta Method and 4th order Runge Kutta Method with the analytical method to solve a power electronic system in both single phase and three phase configuration using decoupled methodology. The values of source current, load cu...
Article
Full-text available
This paper presents the research platform for real-time digital simulation applications which replaces the requirement for full-scale or partial-scale validation of physical systems. To illustrate this, a three-phase AC-DC-AC converter topology has been used consists of diode rectifier, DC link, and an IGBT inverter with inductive load. In this top...
Conference Paper
Power and performance trade-off in multi-core processors is a key problem towards achieving the goal of continuing exponential performance growth. This dissertation makes several contributions in the space of power-performance analyses for multi-core CPUs.
Article
The concept of market power has gained its importance after the electric power industry started a process of transition and restructuring since early 1990s or so. In this competitive electricity market, the operational and the physical constraints of the network possess major threat to the market by the generation companies in exercising its market...
Article
This paper proposes the effective utilization of unified power quality conditioner (UPQC) for interconnecting the PV modules to the grid using power angle control (PAC) method. A shunt active power filter (APF) is used to evacuate the power from the photovoltaic module in addition to compensating the current harmonics, load unbalance and reactive p...
Conference Paper
Full-text available
Major objective for the Thermal power generation is to minimize fuel consumption by allocating optimal power generation from each unit and to maintain emissions within the environmental license limit subject to equality and inequality constraints. The objectives considered in this paper for minimization i.e. cost and emission are of conflicting nat...
Conference Paper
This paper proposes a method for modeling and simulation of photovoltaic system and Maximum Power Point tracking (MPPT). Due to poor efficiency of Photo voltaic (PV) systems some MPPT methods are proposed. All MPPT methods follow the same goal that is maximizing the PV system output power by tracking the maximum power on every operating condition.....
Conference Paper
The net power generated by solar photovoltaic (PV) module and the characteristics of its module depends on irradiance and temperature. This paper presents an analysis of the Solar PV module on the basis of variation in the characteristics under different temperature and irradiance using simulation tool. The base of study is mathematical modelling o...
Conference Paper
In this paper, a detailed analysis is made on capacitor self excitation and DC injection methods of dynamic braking of induction motor through MATLAB/SIMULINK simulations. The effectiveness of these conventional dynamic braking methods is carefully analyzed while changing various parameters. The speed range and time duration for which these methods...
Conference Paper
In this paper an optimally designed PID controller equipped with Power System Stabilizer (PSS) for a Single Machine Infinite Bus (SMIB) system using linearized Modified Philip-Heffron's model is presented. The PSS design based on this model utilizes signals available within the generating station and doesn't require the knowledge about external sys...
Conference Paper
This paper presents testing and implementation of two pulse width modulation schemes i.e. bipolar sinusoidal pulse width modulation (SPWM) technique and unipolar SPWM technique for a single phase H-bridge inverter that is commonly used to regulate the magnitude and frequency of the inverter's output voltage. Both the schemes were implemented on the...
Conference Paper
In the deregulated electricity market, it has become very important to determine the complete information about the participants who are utilizing the transmission network. Transmission line usage computation requires information of generator to load contributions and the path used by various generators to meet loads and losses. In the present rest...
Conference Paper
This research work presents a Chaotic Self Adaptive Particle Swarm Optimization (CSAPSO) algorithm in order to solve the Combined Economic Emission Dispatch (CEED) problem. The main purpose of the work is to derive a simple and effective method for optimum generation dispatch to minimize the fuel cost and emission of power networks by considering s...
Conference Paper
This research work presents a Chaotic Self Adaptive Particle Swarm Optimization (CSAPSO) algorithm in order to solve the Economic Dispatch (ED) problem. The main purpose of the work is to derive a simple and effective method for optimum generation dispatch to minimize the generation cost power networks by considering several non-linear characterist...
Conference Paper
Full-text available
A multilevel inverter is a power electronic device that is used for high voltage and high power applications and has many advantages like, low switching stress, low total harmonic distortion (THD). Hence, the size and bulkiness of passive filters can be reduced. This paper proposes two new topologies of a 7-level cascaded multilevel inverter with r...
Conference Paper
In the recent years, the rapid development of microprocessors has raise up the demand for high-performance and fast processing computing systems capable of performing multiple tasks. Multi-core processors are increasingly advocated as a viable solution to achieve high performance, but under the constraints associated with power bounds. Maintaining...
Article
Full-text available
Feasibility of Interconnected Distribution Network for the Integration of Distributed Energy Resources using GA approach
Article
In the deregulated environment, the economic related problems like generation dispatch, unit commitment, network cost allocation, congestion management, market clearing prices etc. are all associated with the geographical location of the generation companies and the consumers. The number of transmission lines, the distance and the voltage levels ar...
Article
This paper envisages the feasibility of proposed power system configuration, which aspires at maximizing the electricity generation from green energy sources and furthermore to initiate the involvement of the consumers. Once the proposed distribution network configuration implemented, a power system based on distributed energy generation technologi...
Article
This paper presents the unified power quality conditioner (UPQC) performance while interconnecting with photovoltaic (PV) modules in unbalanced and distorted distribution systems. The proposed configuration consists of UPQC and PV modules connected to a DC-link capacitor. The PV modules evacuated power without losing the UPQC fimctions of compensat...
Article
This research paper proposes a simplified and optimized methodology for modeling power electronic interface of wind energy system by incorporating decoupled analytical approach. Mathematical modeling of back to back Pulse Width Modulated IGBT inverter has been developed by using its state variables from its equivalent circuits for each mode. The pr...
Conference Paper
In power system studies, congestion in transmission lines and utilization of Flexible Alternating Current Transmission System (FACTS) devices are closely associated and it is very important due to their role in power delivery system enhancement. It is to be noted that the generation companies can exercise their market power which depends on the lin...
Conference Paper
In this paper an optimal coordinated tuned UPFC controller has been proposed to enhance the damping of low frequency oscillations in a single machine infinite bus power system. The design of controller is developed as optimization model and it is carried out using a novel Elitist Teaching Learning Opposition based algorithm (ETLOBA).
Conference Paper
The advancement in power systems has led to the development of Dynamic Economic Emission Dispatch (DEED)that is difficult to solve by classical optimization method. The proposed paper work is to evolve a simple and effective method for an optimum generation dispatch to minimize the fuel cost and emission of power networks. This paper presents a Cha...