Bhim Singh

Bhim Singh
Indian Institute of Technology Delhi | IIT Delhi · Department of Electrical Engineering

PhD

About

2,494
Publications
439,421
Reads
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50,107
Citations
Additional affiliations
August 2016 - June 2018
Indian Institute of Technology Delhi
Position
  • Chair

Publications

Publications (2,494)
Article
This paper presents a high-frequency model to analyze leakage current (LC) in electronic-pole-changing (EP-C) induction motor drives (IMDs). LC flows through parasitic capacitances in inverter-fed drive systems, resulting from the equivalent common-mode voltage (E-CMV) generated by the inverter's high-frequency PWM strategy. Further, for EP-C opera...
Article
To achieve higher gravimetric and volumetric power density, on-board integrated chargers are employed in EV’s, where drivetrain components are re-utilized for charging purposes. A permanent magnet synchronous motor (PMSM)-based on-board integrated electric vehicle (OBIEV) charger with AC winding currents in charging mode, has issues of instability,...
Article
This article presents a three-phase, single-stage photovoltaic (PV) system with a battery energy storage (BES) that functions in both grid-tied and islanded modes. In grid-tied mode, dual-mode PV-battery system (DPBS) provides functionalities such as reactive power compensation, enhanced power quality (PQ), and feeding PV power to utility. On grid...
Article
Interleaved current fed dual active bridge (CFDAB) converter is a potential converter for low voltage battery charging applications. The output inductors, which are present on the low voltage side of CFDAB, provide ripple-free battery current and shoot through protection under fault conditions. The behavior of this converter slightly differs from t...
Article
A grid tied hybrid charging station is developed to provide fast-charging. It is designed with incorporation of two framework adaptive filters, aiming to enhance power quality and detect variable sparsity in a multifunctional charging station. To regulate DC link voltage to desired level, a cascaded proportional-integral controller is utilized in c...
Article
This paper deals with an advanced discrete generalized integrator frequency-locked loop (DGI-FLL) control algorithm designed for regulating grid-side converter (GSC) of doubly-fed induction generator (DFIG). Its primary function is to ensure consistent regulation of DC-bus voltage of rotor side converter (RSC) and GSC. Notably, this advanced DGI-FL...
Article
Volatility of sustainable power generation sources combined with erratic grid behavior in economically developing countries, bring forward intriguing challenges to effective implementation of a wind-solar microgrid (MG). These challenges consist of preserving an undisturbed functioning of MG despite utility grid/renewable generation uncertainity, i...
Article
Conventional drive converters suffer from several power component counts, a complex circuit design, large switching losses, and other problems. Motivated by these issues, a reduced power components-based asymmetric hybrid inverter is presented for a medium voltage drive. A new structure is designed with a series connection of (1:1) dc-source-based...
Article
This work presents control of interlinking converter for adaptive operation of hybrid microgrid. The hybrid microgrid (HMG) consists of canal based small hydro generation combined with solar panel tied at AC bus. A battery-based energy storage unit (ESU) is used, that balances the DC bus voltage whereas the interlinking converter (ILC) balances the...
Article
Brushless direct current motor ceiling fans (BLDCM-CFs) are becoming popular day by day due to their high performance and also compatibility with a 48V DC-grid. However, these CFs are still in developing phase and costly. Conventionally available 48V DC and 230V, 50Hz AC-DC fans are consuming power-input around 30W to 35W. This increases per year e...
Article
This article presents a microgrid (MG) comprised of a switched reluctance generator (SRG)-based wind energy conversion system and a two-stage solar energy conversion system that operates satisfactorily at nonideal grid and load conditions. A sliding mode observer is implemented to estimate the rotor position and speed needed for SRG operation. Load...
Article
High-cost, slightly high input-power, and poor power-quality (PPQ) at a supply-side are the main concerns in a traditional brushless-direct-current-motor ceiling-fan (BLDCM-CF), which limits its utility. This paper addresses retrofit solutions of problems in an existing BLDCM-CF to increase utility and user attraction to use it. In this, discontinu...
Article
This article presents a modified single-ended primary inductance converter based single-stage ac–dc converter designed specifically for low voltage electric vehicles (LVEVs) charger applications. The rectifier showcases in this article demonstrates a high-step down buck gain, making it ideal for charging low-voltage battery packs commonly found in...
Article
This article analyzes an application of a unified power quality conditioner (UPQC) for improving power quality (PQ) in a stand-alone hydro generating system that supplies electricity to nonlinear loads. In this scenario, a series power active filter (SEPAF) is employed to ensure a consistent and fundamental voltage magnitude across loads, irrespect...
Article
An electromagnetic model of switched reluctance motor (SRM) is required for the process of design and its analysis. It is desirable to achieve the required specification within the limited application constraints. The finite element method (FEM) provides an accurate model at the expense of higher computational cost. The magnetic equivalent circuit...
Article
In this paper, a synchronous reluctance motor (SynRM) drive-based water pumping system integrated to a three-phase distribution grid is presented with seamless mode transition capabilities. Seamless transition operation of SyRM driven three-phase grid interfaced PV fed water pumping system is developed for both grid coupled and decoupled modes ensu...
Article
This work presents a hybrid circuit configuration of eascaded H-bridge (CHB) based static syncbronous compensator (STATCOM) to reduce the frequency deviation and the rate of cbange of frequency (RoCoF) in a bigb inverter-based resources (IBR) network. In this work, an auxiliary three-pbase, two-level voltage source inverter (VSI) is connected in se...
Article
This work presents a bidirectional battery charger (BC)-cum-domestic inverter system for light electric vehicles (LEVs) such as electric two-wheelers (E2Ws) and three-wheelers (E3Ws) applications. Presented BC incorporates a fully bridgeless bidirectional single stage isolated SEPIC AC-DC converter to enable effective power transfer between grid/lo...
Article
Full-text available
Diesel generators (DGs) are widely used in India by business and domestic consumers to provide resilience against unreliable power supplies, but have serious adverse environmental and health impacts. Low carbon alternatives to DGs are becoming more widely available and affordable, though technical and non-technical barriers remain to their widespre...
Article
Major design challenge for portable charger design, is a wide electric vehicle (EV) battery voltage compatibility. Additionally, wide variation in power transfer deteriorates dc–dc conversion efficiency. To immune system for wide range of power transfer and voltage, some modifications are proposed in this work. These modifications are inspired by z...
Article
For EV charging applications, performance of LLC resonance half-bridge is greatly influenced by non-linear variations in battery parameters. This has a significant impact on charging efficiency and system reliability. For efficient operation, all FETs must operate with zero voltage switching (ZVS). Additionally, converter must operate with minimum...
Article
In order to improve speed control performance of a switched reluctance motor (SRM) drive with load uncertainties, an error-based reference model in combination with a higher order sliding mode observer (HOSMO) is developed to compensate for lumped disturbances and to shorten time of speed response. At first, HOSMO estimates load conditions along wi...
Article
An improved multicarrier modulation technique is presented for single-source cascaded H bridge based solar multilevel converter (SMLC). Main aim of this article is to improve harmonic profile at converter output voltage. New modulation is introduced, which is summation of pulse and triangular carrier functions to have a new modified level arranged...
Article
Electrification of the transportation system is needed to reduce carbon emissions. To ease the adoption of electric vehicles (EVs) by consumers, development of accessible charging infrastructure is required. However, the integration of charging infrastructure has adverse impacts on the distribution grid, due to the frequent connection and disconnec...
Article
During grid-outage, photovoltaic array and battery supported water pump system with grid connection is operated in an islanded-mode. It is necessary to facilitate synchronization of system with grid to realize on-demand water pumping and to increase utilization of system. Thus, a generalized delayed signal cancellation (GDSC) with frequency drift c...
Article
In this article, we present a modified least mean square (M-LMS) adaptive filter-based controlled grid-integrated photovoltaic system (GPVS) with the capability for islanded operation during power cuts. The system employs a two-stage configuration to regulate the voltage at dc link. Designed M-LMS is utilized to extract ripple-free dq -axis compo...
Article
The presented work demonstrates a battery energy storage (BES) equipped photovoltaic array (PVA) generation unit, with the capability to operate reliably in weak grid conditions, while maintaining distortion-free and balanced grid currents. The grid voltages are treated using a pair of presented multiple second order generalized integrator with DC...
Article
Solar energy conversion system (SECS) operation becomes strenuous when it is integrated into a weak distribution AC grid and feeds local nonlinear loads. Distorted/unbalanced point of common coupling (PCC) voltages create challenges in SECS, such as loss of synchronism and inferior power quality. These power quality issues are intensified if power...
Article
A new configuration for integration of large-scale solar photovoltaic plant (LSPV) with a medium voltage (MV) grid (Typically 11 kV) is presented. This modular multilevel converter topology uses four cells with 1:3 (trinary) PV voltages in each phase to have seventeen levels in pole voltage. Each module has two PV arrays with six switches to have 5...
Article
A projectile attached to an armature in a railgun is pushed with a very high force to reach high kinetic energy. To provide higher forces, either single or sequential switching of pulse-forming networks is performed for the current generation. The force profile and, in turn, the jerk on the armature are affected by the shape of the current pulse. I...
Article
One technique to enhance the inductance gradient of an electromagnetic railgun (EMRG) is to narrow the rails toward the muzzle end. The narrowing of rails along their length is called tapering. This article introduces the concept of taper angle and investigates the effect of taper angle on the rails by keeping the sliding contact intact. The effect...
Book
This book entitled “Recent Advances in Power Electronics and Drives - Select Proceedings of EPREC-2023 provides rigorous discussions, case studies, and recent developments in the emerging areas of power electronics, especially in power inverters and converters, electrical drives, regulated power supplies, electric vehicle and its charging infrastru...
Article
This paper deals with control of a single-phase grid-connected solar photovoltaic (SPV) array based synchronous reluctance motor (SynRM) driven water pumping system with seamless mode transition and power quality improvement capability. Presented system provides an uninterruptable power supply to dedicated water pump and domestic loads even under g...
Article
An interactive solar water pumping unit (SWPU) with enhanced frequency locked loop (FLL) based synchronization to ensure uninterrupted power for smart residential prosumers is presented in this paper. Enhanced FLL ensures rejection of both DC-offset and selected harmonics unlike conventional FLL, thereby improving performance of interactive SWPU, a...
Article
Ceiling fans (CF) with brushless direct current motor (BLDCM) are available commercially. However, power-quality issues are present in an existing CF like high supply current harmonics distortion, poor power factor (PF), electromagnetic interferences (EMI), etc. Power quality and EMI issues are present due to high-frequency PWM control of an invert...
Article
This work aims to develop an adaptable electric vehicle charging station that utilizes renewable energy sources in a microgrid without imposing significant strain on distribution network. Developed electric vehicle charging station is able to function in two modes with or without utility grid in unusual situations. Significant contributions are as,...
Article
A centralized real-time control based on recent guidelines and standards is presented in this work. The present study introduces a two-loop control capable of adapting to frequency changes, enabling a seamless transition. Obtained results indicate that this approach achieves synchronization during frequency step change and sinusoidal variation of u...
Article
The interoperability of wind and solar energy is a potential alternative to improve reliability and reduce the probability of an energy supply crisis. Due to the stochastic nature of both the sources, maintaining high quality performance in grid-intertie hybrid energy systems, particularly for nonlinear loads, is essential for efficient use of ener...
Article
The most common factors influencing performance of on-board EV chargers are grid voltage and a diverse loading pattern. Furthermore, the proportion of ripples in charging current affects charger and battery health. To overcome these concerns, a model predictive (MP) hybrid dual phase shift modulation (hy-DPSM) approach is developed. It arrives with...
Article
Switched reluctance generator (SRG) presents significant potential for application in wind generation systems, primarily due to its windings or magnet free rotor construction. However, its operation requires rotor position at every instant and may be obtained using resolvers, encoders, or Hall-Effect sensors. These sensors add substantial system co...
Article
This work presents a second-order generalized integrator (SOGI)-adaptive complex filter (ACF) based control with variable power mode to address synchronization and voltage rise issues in a grid integrated solar photovoltaic (GSPV) battery storage (BS) system. SOGI-ACF method is a fourth-order filter that resolves synchronization and power quality (...
Article
To reduce the cost and to improve system performance and reliability, this paper deals with a current sensor reduction technique for switched reluctance motor (SRM), running using fundamental switching of a midpoint converter with fewer devices than a conventional SRM asymmetric halfbridge converter. A midpoint converter energizes phases of SRM dri...
Article
An onboard charger (OBC) segment is currently dominated by two-stage charger designs, which suffer from drawbacks such as large size, low efficiency due to a high component count, elevated cost, and intricate controller requirements. To address these challenges, this work explores an implementation of an isolated bridgeless version of a modified Si...
Article
To address power-quality (PQ) issues in an existing ceiling fan (CF), an isolated bridgeless power-factor-corrected AC–DC converter (BL-PFCC) is implemented at fan’s front-end. In this, a diode bridge rectifier (DBR) is removed to get better efficiency with improved supply PQ. To enable all its benefits, including inbuilt unity power factor (UPF),...
Article
This work deals with the multiobjective optimization of control factors of a switched reluctance motor (SRM) drive for an electric vehicle (EV) application using an optimization algorithm with reduced computation effort. In motor operation using conventional torque sharing function (TSF), input control parameters must be optimized to achieve desire...
Article
This paper deals with a single stage photovoltaic (PV) system with improved resilience against adverse grid conditions. This is majorly achieved in two ways. First, it presents an enhanced filtering generalized integrator (EFGI) based filtering stage, to process the prevalent grid voltages and derive their positive sequence components free of harmo...
Article
PWM plus phase shift (PPS) modulation is a popular modulation technique for the current fed dual active bridge (CFDAB) converter. Power transfer characteristics for any modulation technique are important for converters. However, in the literature, different power characteristics of CFDAB are presented for PPS modulation. This disparity in power tra...
Article
The charging current variation at various level of battery operating conditions and state of charge (SOC), often requires precise and accurate control in EV charging to achieve desired power transmission. This paper proposes a gain adaptive sliding mode control (ASMC) with a modified phase-shift algorithm to facilitate EV fast charging at various l...
Article
The local nonlinear loads impact perfromance of a microgrid (MG), as they degrade the system power quality (PQ). This degradation is more in a diesel generator (DG) based standalone MG than grid-connected MG. Therefore, this paper introduces an enhanced adaptive multilayer complex coefficient filter (EAMCCF) control for PQ enhancement of a MG compr...
Article
Full-text available
A single stage high power quality (HPQ) rectifier, comprising an extended step-down gain modified Zeta converter is realized in this work for low voltage E-2-wheelers (E2Ws), and E-3-wheelers (E3Ws) battery charging applications. The presented rectifier exhibts wide output range feature and therefore, setup of a universal charger for all classes of...
Article
This work presents a new medium voltage nine-level solar converter, which uniquely connects the three-leg converters. The output terminal connects the voltage source converter (VSC) to the upper switch of the next VSC. Moreover, photovoltaic (PV) arrays are connected in series with a negative terminal connected to the positive dc rail of next VSC....
Article
Full-text available
A cost effective, efficient, and compact battery charger (BC) with a general-purpose charging characteristic, is presented in this work for the electric two-wheelers (E2Ws) and three-wheelers (E3Ws) consumers. In the presented BC, a flyback AC-DC converter with a fully bridgeless structure and simple control/gate drive circuitry is employed to faci...
Article
Performance indices of a grid-interactive microgrid fall off and defy the set IEEE std. 1547, when the loads connected at its point of common coupling (PCC) draw unbalanced/distorted currents. In this context, this work introduces a cascaded least mean square (C-LMS) algorithm-based harmonics mitigation and compensator method to integrate the load...

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