Sujit K. Biswas

Sujit K. Biswas
Jadavpur University | JU · Department of Electrical Engineering

BEE (JU), ME (IISc), PhD (IISc)

About

153
Publications
126,663
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
740
Citations

Publications

Publications (153)
Conference Paper
Individual distributed energy resources (DER) because of their small capacity are not able to participate in energy trading. A novel concept has been used in this paper wherein Virtual Power Plant (VPP) acts as an aggregator and can provide scheduled dispatch of power and thereby participate in energy trading of the grid. VPP operator (VO) is the a...
Conference Paper
This paper proposes a decentralized secondary control scheme suitable for islanded microgrid consist of multiple VF controlled inverters connected in parallel. The controller is based on proportional-integral control to maintain frequency and voltage under different load switching conditions. Moreover improved system performance and reliability are...
Article
Full-text available
This study presents a winding open-circuit fault-tolerant control scheme for an open-end induction motor drive with common DC bus for dual inverters. The proposed control scheme also permits balanced three-phase operation of the same motor under healthy operation. It can suppress common mode current easily, yet permits maximum DC bus utilisation in...
Article
This article presents a new collaborative control method based on expert decision, proposed for the combined system of an ac grid with a low THD thyristorized static var compensator (SVC), interconnected to a dc microgrid through a distribution static compensator (D-STATCOM) that also works as a bidirectional power converter. The combination of lar...
Conference Paper
Full-text available
Renewable energies like Photo Voltaic (PV)/ solar power are abundantly available and waiting to be harnessed. Being weak system renewable energy based power systems require reactive power generation close to load to unburden the source. Study reveals fixed tuned Proportional & Integral (PI) controller based DSTATCOM may not be able to provide satis...
Conference Paper
Renewable energies like Photo Voltaic (PV)/ solar power are abundantly available and waiting to be harnessed. Being weak system renewable energy based power systems require reactive power generation close to load to unburden the source. Study reveals fixed tuned Proportional & Integral (PI) controller based DSTATCOM may not be able to provide satis...
Conference Paper
Full-text available
DSTATCOM is a shunt compensation device connected at Point of Common Coupling (PCC) of Distribution System to deliver quality power. The proportional & integral controller (PI) of DSTATCOM needs tuning at the time of installation as well as due to change of network parameters and working conditions, can provide a slower response. To ensure plug and...
Article
Full-text available
This work presents a three-phase Thyristor Controlled Reactor which makes use of two constituent banks of controlled reactors, with coordinated control of triggering angle of both the banks. The first reactor bank has a set of ‘delta’ connected back-to-back thyristor switches with a balanced set of reactors in series with each switch, while the sec...
Article
A 3-phase 3-wire Thyristor Controlled Reactor topology is presented comprising of two banks, involving Thyristor Switched & Controlled Coupled Reactors (TSCCR), one bank of which is “ $\Delta$ ” connected and the other being “Y” connected. Each TSCCR comprises of a reactor with two well coupled identical sections, two main thyristor back-to-back sw...
Article
The conventional ‘Delta’ connected Thyristor Controlled Reactor (TCR) bank used for Static VAR Compensation (SVC) and other applications is proposed to be split into two identical ‘Delta’ banks each having kVAR capacity half of the total TCR capacity. The study presented shows that such combination of two identical ‘Delta’ connected reactor banks,...
Article
In the context of electricity shortage and an attempt to save the environment, introduction of energy efficient motors in different fields of application has become a necessity. This paves the way for fusing the conventional machine design procedures with optimization techniques. Unfortunately, the mathematics of electrical machine design involves...
Article
A 3-phase 3-wire Thyristor Controlled Reactor topology is presented comprising of two reactor banks, involving simultaneous firing angle control of both banks having maximum kVAr in the ratio of 60:40. The first reactor bank is ‘Δ’ connected and has phase switching while the second reactor bank is either ‘Δ’ or equivalent ‘Y’ connected with line sw...
Article
Three phase converters using diode or Silicon Controlled Rectifier (SCR) are widely employed to convert the commercial AC supply to DC. Such converters inject harmonics into the power supply system and thereby distort supply system voltage waveform. A simple input current wave-shape improvement technique using a shunt connected harmonic current com...
Article
A new Thyristor Controlled Reactor (TCR) scheme is presented in this paper in which the total bank is split into one Δ and one Y connected reactor bank with the addition of a low rating Zig-zag autotransformer, instead of the conventional scheme using a Δ connected reactor bank with a harmonic current filter. This arrangement prevents the triplen h...
Conference Paper
In this paper the conventional ‘Delta’ connected TCR bank is split into two identical ‘Delta’ banks each having kVAr capacity half of the total TCR capacity. The study presented shows that such combination of two identical ‘Delta’ connected reactor banks, one with phase switching by thyristors and the other with line switching thyristor arrangement...
Conference Paper
Renewable energy potential in the form of wind or micro hydro are available in abundance at rural locations far away from city habitat. To harness this green energy the rugged induction generator has come up as a viable option. However, induction generator has change in reactive power requirement with change in load. This dynamic reactive power req...
Conference Paper
Diode and thyristor based solid state converters are preferred because of their high reliability in applications for bulk power conversion. These converters generally use Power diodes or SCR (silicon controlled rectifiers) which has non-linear characteristics. Due to this reason such converters generate highly non-sinusoidal currents at the power s...
Conference Paper
Wireless power transmission systems has revolutionized the transmission of power in various application. The concept has gained momentum recently. This work presents an exhaustive insight and detailed discussion on the components of a systems having Wireless Power Transfer (WPT) and the various techniques used for its implementation. The use of WPT...
Article
Full-text available
This study presents a control algorithm of a grid tied solar photovoltaic (PV) system using a dual reference phase shifted pulse width modulation technique for a single-phase cascaded N-level inverter. The grid tied inverter consists of several five-level hybrid inverter modules which are connected to the solar PV panels having equal DC voltage mag...
Article
The concept of a double rotor motor presented earlier and its equivalent circuit has been developed, showing a non-linear parameter content. The two rotors (which are recommended to be double cage type for development of high starting torque) can run with equal or unequal speed independently, depending on their individual loading. This paper presen...
Article
Bidirectional ac to dc converters connected to the ac supply lines is an important area of research in view of the increasing requirements of grid tied converters for renewable energy systems, having near-sinusoidal ac line current and near-unity power factor. Total losses and hence the efficiency of these converters as well as its control complexi...
Article
This paper presents the effectiveness of a microgrid (MG) in a distribution system. The combined heat and power (CHP) system is used to enhance the overall efficiency of the power system. Microturbines are used for CHP operation in this paper. The various methods of control of the MG are discussed. A simple low-cost model is proposed for MG based o...
Conference Paper
Z-Source inverters can overcome some of the limitations, inherent in traditional Voltage Source and Current Source Inverters and can provide boosted outputs. Most of the literature on Z-source inverters deals with 3-phase or 1-phase bridge inverters. This paper proposes a Single-Phase Z-Source Push-Pull Inverter topology. This scheme has several ad...
Article
Full-text available
This study presents a generalised online switching scheme for a space vector pulse-width modulation (SVPWM)-based multilevel inverter of any voltage level. The proposed SVPWM algorithm implements a generalised three-(similar to five) and seven-segment switching scheme using the three most desired switching states and one suitable redundant state fo...
Article
This paper presents a new closed-loop control strategy for a Current Source Inverter (CSI) fed induction motor drive system. It is based on an analog torque computation circuit, which provides information about the actual machine torque from the dc link variables and the inverter frequency. A major advantage is that it does not require a tachogener...
Article
Full-text available
This paper proposes a reduced switch voltage source converter (VSC) topology implemented as a voltage controller in isolated power systems. In isolated power systems generally self-excited induction generators (SEIG) are used mainly for their ruggedness and economic reasons. Mostly for constant power applications such as pico hydro uncontrolled tur...
Article
Full-text available
p>This paper proposes a reduced switch Open-Delta (OD-VSC) voltage controller for an standalone asynchronous generator (SAG), also known as the self-excited induction generator (SEIG),used in constant power applications such as pico hydro uncontrolled turbine driven isolated induction generator (IAG) for feeding three-phase loads. The proposed redu...
Article
Wind as renewable energy potential is abundantly available at remote locations. This can be harnessed by using the rugged induction generator. However there is a dynamic requirement of reactive power as the load changes. A DSTATCOM has been proposed in this paper to cater for the dynamic requirement of the reactive power for the Induction generator...
Conference Paper
Power blackouts are major catastrophic failures in large inter connected power systems. Risk of blackouts is more than expected and must be considered in the power system studies. In past, many power blackouts occurredworldwide. An attempt has been made to summarize those major blackouts with their effects. To resolve the risk factors identified by...
Conference Paper
The requirements of generating various low frequency voltage waveshapes are usually catered by using linear amplifiers, which results in low overall efficiency. High frequency voltage source inverters with low pass filter at the output are not suitable for these applications, as it is difficult to produce waveshapes containing high frequency compon...
Conference Paper
Photovoltaic energy has been playing a key role among the renewable energy sources of the future. Converting this energy which is trapped into a low voltage battery, to a higher voltage for appropriate use, in an area of present day research. A single phase boost inverter operating on four switches has been presented in this paper. The use of inter...
Conference Paper
Renewable energy potentials available at rural locations are often harnessed using induction generators. These generators are connected in parallel to form an autonomous local grid, to improve the quality of power supply to the consumers. A DSTATCOM is connected in shunt to the autonomous grid to compensate the loads and to provide the required rea...
Conference Paper
Various problems come to the fore, in order to achieve high voltage boost using the basic form of non-isolated boost converter. A number of topological improvements have been suggested by researchers to achieve higher voltage boost ratio with their inherent pros and cons. This paper presents an overall study of four such converters including the bo...
Article
A battery Energy storage system (BESS) based voltage and frequency controller (VFC), for an Autonomous Asynchronous Generator (ASG) driven by an uncontrolled pico hydro turbine used in constant power mode, is presented in this paper. Excitation of the asynchronous generator with capacitor bank enables it to generate rated voltage at no load. The ad...
Article
An electric supply system should invariably show ideal sinusoidal voltage and current signals at every consumer end. But in fact electric utilities hardly find such desirable conditions due to several factors. Use of wide variety of domestic and industrial equipments is one of the reasons. In order to improve the performance to cope up with technol...
Patent
Full-text available
Disclosed is a rotating electric machine for generating a constant frequency AC power supply from a variable speed primemover including: a stator wound with two sets of isolated polyphase windings having the same number of poles, with the polyphase windings located at about 90 degree displacement in space between them, and a rotor wound with two se...
Article
A new inverter topology is presented in the paper, which produces a reduced low-order harmonic voltage waveform because of a natural harmonic cancellation process. Two switches of each limb operate at low switching frequency, whereas the other two switches of the same limb operate at higher switching frequency in conjunction with two additional cap...
Conference Paper
A paradigm shift is evolving for the way electrical power is being generated from the traditional concept of centralized large generators to small generators connected to the distribution system powered by non conventional and renewable sources. These small generators were primarily for back up and were not synchronized to the grid. A trend is bein...
Article
Full-text available
This study presents a simple and a generalised space vector pulse-width modulation scheme for a neutral point clamped multi-level inverter as well as cascaded inverter of any level. This modulation algorithm implements the online generation of desired switching states and their sequences through generalised expressions without any predetermined sto...
Conference Paper
This paper presents a 500W Soft Switched Flyback converter operating in discontinuous mode. The detailed circuit description, operation, characteristics, circuit equations and simulation results of the Active Clamp Flyback converter are presented here. The clamp capacitor absorbs leakage and a part of magnetizing energy stored in the primary windin...
Conference Paper
The difficulty in predicting the required air gap due to problems in calculating the Fringing Factor in magnetic circuit at the location of air gaps, causes various ambiguities in the design process of inductors. Significant number of researchers are still trying to find better prediction of fringing. But with standard and available formula it is d...
Article
Full-text available
The concept that an inverter can be used as a generalized impedance converter to realize either inductive or capacitive reactance has been widely used to mitigate power quality issues of distribution networks. One such device is the DSTATCOM which is connected in shunt at the load end. The heart of the DSTATCOM is a converter. The control algorithm...
Article
Full-text available
Deregulation of the electric power energy market has thrown open opportunities for tapping the large number of small pockets of renewable energy sources with the asynchronous generators. Whether the power is supplied by asynchronous generator or by the grid at the remote location, its quality has become an important aspect for consumers of electric...
Article
Full-text available
This paper presents the software implementation of a simple sector independent Space Vector Modulation (SVPWM) technique for simple motor drive applications using DSP processor. Conventional Space Vector modulation techniques are quite complex and computation intensive. In both software as well as hardware based implementation it is required to det...
Article
Full-text available
This paper presents the application of distribution static compensator (DSTATCOM) for mitigating the frequently occurring problems of voltage dips in autonomous systems. Consumer loads are experiencing proliferation of induction motors. The starting of induction motors draws large current causing voltage sag (dip). Autonomous Power system is compar...
Article
Full-text available
An improved fully soft-switched boost converter for active power factor correction is presented here. The converter uses an auxiliary circuit consisting of a switch, one inductor, a resonating capacitor and a diode. Unlike several earlier solutions, all switches used in this converter turn on and turn off under fully soft-switched condition. The bo...
Article
Full-text available
Large inductive loads require larger rating of DSTATCOM to generate the required reactive power of the load. Larger the rating of the DSTATCOM higher is the cost. Most distribution system has a base reactive power requirement. The reactive power demand at any instant varies around the base value. A window operation of the DSTATCOM is proposed in th...
Article
Full-text available
A three phase voltage source converter using six power switches is a very important structure with wide variety of applications involving sophisticated ac drives, active power filters and power supplies etc. PWM voltage source inverters are also being incorporated in grid connected distributed power generating units to provide secure and reliable p...
Conference Paper
The paper discusses the effectiveness of the MicroGrid (MG) in a distribution system. Combined heat and power (CHP) system has been used to enhance the overall efficiency of the power system. Microturbines have been used for CHP operation in this paper. The various methods of controls of the MG are also discussed. A simple and low cost model for MG...
Conference Paper
Bi-directional DC-DC converters facilitate controlled flow of energy in both directions. They are useful in battery charging/discharging, UPS, grid-connected renewable energy storage etc. Considerable amount of ongoing research deals with various improvements of these types of converters. This paper presents the optimized design methodology of an i...
Conference Paper
Full-text available
Some of the major drawbacks of Voltage-fed converter can be resolved by its Current-fed counterpart with its certain practical advantages. The recent increase in interest and use of current-fed converters calls for establishing a systematic design methodology. While some papers have provided useful insights to these converters, elaborate design ste...