Soumya Ranjan Sahoo

Soumya Ranjan Sahoo
Indian Institute of Technology Kanpur | IIT Kanpur · Department of Electrical Engineering

PhD

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114
Publications
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818
Citations

Publications

Publications (114)
Article
A novel Cournot model design for trading price functions, incorporating line-losses in the electricity market (EM), is proposed in this paper. The proposed transactive EM framework has a major EM and a local market (LM) inside a microgrid. The protagonist in major EM is the transmission network operator, which buys electric units from a generating...
Article
In the existing literature on the robust control design of UAV systems, the controllers are designed without considering motor dynamics. Hence, if these controller gains are not correctly tuned, the system undergoes oscillation and may even go unstable. We have demonstrated this through an experiment in this work. Here, we propose a novel control s...
Article
This paper addresses the challenge of velocity control in fixed canard decoupled dual-spin projectiles, focusing on the nonlinearities and parameter uncertainties of the system. A motor-generator test bench and a dynamical model are developed to emulate the dual-spin system accurately, enabling thorough experimentation and analysis. Robust control...
Article
The series stacked active power decoupling (SS-APD) circuit is a power dense and efficient alternative for ripple energy storage in single phase power converter. The SS-APD circuit needs to absorb a small amount of real power to meet power losses in it. For this, the literature uses additional power supply or modifies the controller for SS-APD circ...
Article
The multi-agent rendezvous problem for single- and double-integrator agents in the presence of unknown constant input and communication delays is investigated in this paper. Existing works address the rendezvous problem by incorporating negative gain(s) into the distributed consensus protocol and showing that negative gain(s) expands the reachable...
Article
Full-text available
Due to limited reserves and 100% inverter-based resources in an islanded residential microgrid (IRM), largefrequency oscillations may arise during load/generation fluctuations. As an independent grid-forming unit, a battery energy storage system (BESS) can participate in load-frequency control (LFC) to achieve environment-friendly and reliable supp...
Preprint
Full-text available
With uncertain injections from Renewable Energy Sources (RESs) and loads, deterministic AC Optimal Power Flow (OPF) often fails to provide optimal setpoints of conventional generators. A computationally time-efficient, economical, and robust solution is essential for ACOPF with short-term injection uncertainties. Usually, applying Robust Optimizati...
Article
With uncertain injections from Renewable Energy Sources (RESs) and loads, deterministic AC Optimal Power Flow (OPF) often fails to provide optimal setpoints of conventional generators. A computationally time-efficient, economical, and robust solution for ACOPF with short-term injection uncertainties is essential. Robust Optimization (RO), when used...
Article
This paper investigates the synchronization problem for generic linear multi-agent systems with known or unknown heterogeneous input and communication delays. We propose two protocols that consist of consensus-based internal controller states and decentralized controllers. This kind of distributed dynamic control methodology is able to circumvent t...
Article
The existing techniques solve the rendezvous problem and characterize the final convergence point in the absence or presence of homogeneous input/communication delays. In this article, we analyze the rendezvous problem of double-integrator multi-agent system (MAS) in the presence of heterogeneous input and communication delays. We employ cyclic pur...
Article
This paper proposes a distributed secondary controller for dc microgrid which achieves both current sharing and voltage regulation by exchanging just one variable per converter. Generally, output current and voltage information are used by secondary controllers to attain both these objectives. With more sources, the amount of data to be handled, an...
Article
This paper presents the analytical-cum-numerical-based mathematical model for the multiphysics simulation of a high-speed unipolar axial eddy current brake (ECB). The operating principle and the necessary multiphysics simulation for an ECB are introduced. An analytical method is developed for high-speed ECB operation to search coarse parameters in...
Article
Battery energy storage system (BESS), as grid forming unit, can quickly regulate voltage and frequency for a 100% inverter-based islanded low voltage microgrid. However, due to some inherent characteristics of this network, such as: (a) coupling among voltage and frequency dynamics, (b) dynamics of dc source, and (c) timescale coupling among conver...
Article
This paper focuses on the consensus tracking problem for a group of single-integrator agents with heterogeneous communication and input delays, with the goal of achieving the maximum exponential convergence rate. Existing research discusses a tracking protocol consisting of a consensus-based estimator and a tracking controller for each agent, as we...
Article
Aluminum electrolytic capacitors (AECs) and power semiconductor devices (PSDs) are typically identified as weak links in the reliable design of power converters. To eliminate the AECs from the design, active power decoupling (APD) circuits are preferred in single-phase power converters. However, in an attempt to eliminate AECs, this approach introd...
Article
During the implementation of a cooperative algorithm, information about the agents' velocity may be unavailable due to the space constraint and availability of sensors. Thus, it gives rise to the design of distributed average tracking (DAT) algorithms without using agents' velocity measurements. These are denoted as velocity-free DAT problems. The...
Article
The service of grid voltage regulation is required nowadays from inverter-based resources (IBRs) particularly at the lower voltage level. In the transmission network, this is easily managed by leveraging solely the reactive power (Q) capability of the IBR, but in distribution networks that are mix of $L$ and $r$ the voltage magnitude is coupled...
Article
Full-text available
A microgrid may be subjected to various unexpected events, such as sudden tripping of a generator/load, line outages due to faults, sudden switching of large capacitor banks, etc. Detection and classification of events play an essential role in the reliable operation, control, and restoration of microgrids. Due to low observability in microgrids, a...
Article
This letter presents a distributed protocol for a heterogeneous MAS to track the global maximum of multiple time-varying references. We define this as the global max-tracking problem. Compared to the existing max-consensus problems, the global max-tracking problem has more challenges, as the references are time-varying, and no agent has any knowl...
Article
Thermal stress because of mean junction temperature (\textcolor{blue}{ $T_\mathrm{{jm}}$ }) and junction temperature swing (\textcolor{blue}{ $\Delta T_\mathrm{j}$ }) reduces the lifetime of the power electronic (PE) converters. It is beneficial to distribute the stress evenly among the converters operating in parallel in a system like microgrid...
Article
We study the bounded consensus tracking problem for the heterogeneous multiagent system composed of single- and double-integrator agents in the presence of diverse communication and input delays. The objective is to ensure bounded tracking when only a portion of agents has access to the desired trajectory while agents interact with each other throu...
Article
Full-text available
A battery energy storage system (BESS) can play a critical role in regulating system frequency and voltage in an islanded microgrid. A $\mu$ -synthesis-based robust control has been proposed for dc link voltage regulation of BESS for achieving frequency regulation and voltage quality enhancement of islanded microgrid. Variation in the operating c...
Conference Paper
Network operators are currently exploring how embedded solar generation can assist with voltage regulation in the distribution network, usually by leveraging the inverter’s reactive power capability. In highly resistive networks, reactive power alone may not be sufficient, which has motivated researchers to explore how simultaneous adjustment of ac...
Article
Full-text available
The connection of nonlinear constant power loads (CPL) in a low power dc system leads to a reduction in the stability margin of the system. Most of the existing techniques increase the stability margin by modifying the controller for CPL or source converter at the cost of deterioration in the performance of converters. Few publications have suggest...
Conference Paper
With the proliferation of non-linear loads, the power quality particularly in the distribution level of the grid is deteriorating. The recent grid codes impose limit on the total demand distortion (TDD) and harmonic distortion (HD) level caused by these non-linear loads. The recent published researches focus on how to exploit the embedded photovolt...
Article
This article studies the consensus tracking problem for a group of double-integrator agents in the presence of heterogeneous communication and input delays. We consider a tracking protocol comprising a consensus-based estimator for the desired trajectory with a simple tracking controller for each agent, which ensures bounded tracking under input de...
Conference Paper
Full-text available
Distributed secondary controllers in dc microgrid are used for low voltage regulation and proportional current sharing among the source converters. These controllers depend on the calculation of global average of the source voltages and ideal value of the current that each source must share. These values are usually calculated using an all-to-all c...
Conference Paper
Full-text available
Distributed secondary controllers in dc microgrid are used for low voltage regulation and proportional current sharing among the source converters. These controllers depend on the calculation of global average of the source voltages and ideal value of the current that each source must share. These values are usually calculated using an all-to-all c...
Article
A group of unmanned aerial vehicles (UAVs) can efficiently obtain the information of an unknown target or location of interest. Efficacy of localization gets enhanced if UAVs form an optimal formation geometry around the target. This work presents a unified scheme of cooperative localization and tracking for a group of fixed-wing unmanned aerial ve...
Article
Proportional harmonic current sharing among inverters is desired in AC microgrid with non-linear loads. R/R-L based virtual impedance is emulated to achieve good harmonic current sharing at the cost of increased harmonic voltage distortion. To reduce voltage distortion, negative resistance emulation is suggested, which suffer from reduced stability...
Article
A containment control problem deals with driving the followers in a multi-agent system (MAS) into the convex hull formed by the maneuvering leaders. The design of such a control is dependent on the measurements or exchange of complete state information, such as acceleration, velocity, and position. In this work, we propose a containment protocol wh...
Article
In this paper, we present a consensus strategy based on cyclic pursuit which ensures rendezvous at any desired point in two-dimensional space ( ${\mathbb{R}^{2}}$ reachability) starting with any nonsingular initial configuration of the agents. Choice of a negative gain expands the reachable set beyond the convex hull of the initial configuration o...
Article
In dc microgrid, proportional current sharing among the sources is recommended while maintaining the system voltage within the limits. To achieve this, secondary control is often employed along with the primary droop controllers. As secondary controllers rely on communicated values, a larger delay in the communication channel can make the microgrid...
Article
For a multi-agent system (MAS), researchers have explored min-consensus for single-integrators under uniformly strongly-connected digraph, and double-integrators under jointly-connected graphs. However, the extension of these works is non-trivial for heterogeneous higher-order integrators under switching digraphs. This paper proposes a min-consensu...
Article
In this work, we design an algorithm for a group of higher-order integrators aiming to track the average of multiple time-varying and possibly unbounded reference signals. The existing literature has studied distributed average tracking (DAT) for higher-order systems in the presence of bounded or Lipschitz-type reference signals. In such DAT algori...
Article
In this paper, we address the multi-agent rendezvous problem for a group of single-integrator agents in the presence of a constant arbitrarily large bounded homogeneous communication delay. The agents are required to meet at a tunable desired point, which is unknown to all agents. To achieve this objective, we choose the cyclic pursuit strategy whi...
Article
Autonomous landing is a challenging phase of flight for an aerial vehicle, especially when attempting to land on a moving target. This paper presents vision-based tracking and landing of a fully-actuated tilt-augmented quadrotor on a moving target. A fully-actuated vehicle allows higher freedom in terms of control design and a larger flight envelop...
Article
This paper presents robust nonlinear control of a variable-pitch quadrotor with the flip maneuver. Backstepping approach is chosen for nonlinear control design. A control allocation loop dynamically computes the blade pitch angle of each rotor. A systematic method to select controller gains is presented that ensures closed-loop stability. Detailed...
Conference Paper
A cooperative consensus algorithm is proposed for a group of double integrators. This algorithm is based on minimal relative information and does not use communication networks. Each agent counts the number of predecessor and successor neighbors. The difference of these numbers is used in the controller instead of any accurate range or position mea...
Chapter
Full-text available
In this paper we propose a novel end-to-end convolution dehazing architecture, called De-Haze and Smoke GAN (DHSGAN). The model is trained under a generative adversarial network framework to effectively learn the underlying distribution of clean images for the generation of realistic haze-free images. We train the model on a dataset that is synthes...
Article
Full-text available
This study presents a novel secondary control strategy for a radial microgrid with end-to-end distributed energy resource (DER) interconnections, operating under islanded conditions. The control strategy utilises sparse communication and precludes the presence of a centralised controller. The distributed algorithm has a twofold objective. The first...
Conference Paper
The sources, interfaced with the microgrid using power electronic converters have inherently low physical inertia. With step variation in load demand, voltage and frequency difference are created among the sources during transient and the low frequency oscillations appear in the power supplied through the interconnecting lines. This may even lead t...
Article
Full-text available
In this paper we present a protocol to track a general trajectory for a multi-agent system in the presence of heterogeneous constant finite input delays. We consider two different multi-agent cases: agents with single-integrator and double-integrator dynamics. For the single-integrator case, we assume that the velocity along the desired trajectory...
Preprint
The topological obstructions on the attitude space of a rigid body make global asymptotic stabilization impossible using continuous state-feedback. This paper presents novel algorithms to overcome such topological limitations and achieve arbitrary attitude maneuvers with only continuous, memory-less state-feedback. We first present nonlinear contro...
Conference Paper
Full-text available
This paper presents a novel consensus tracking protocol for a group of double integrator agents. The target to be tracked is maneuvering with a non-zero bounded acceleration. It is assumed that at least one agent knows target's position and velocity. In this work, we assume that relative state measurements (position, velocity, and acceleration) are...
Article
Full-text available
To achieve proportional power sharing among similar sources in DC microgrid, droop controllers are used. However, due to interconnecting cable impedances, power shared by the sources deviate from their desired values. To alleviate this problem, techniques utilising shift in droop characteristics and/or modification in droop gain are suggested in li...
Article
Sources in a dc microgrid are required to have proportional current sharing and low voltage regulation. Conventional droop based control techniques achieve proportional current sharing but the voltage regulation of individual bus may be large due to large value of droop gains. In literature, secondary controllers are discussed to improve either the...
Conference Paper
This paper presents a cooperative control scheme for circumnavigation problem using a group of fixed-wing unmanned aerial vehicles (UAV). Each UAV can measure the range and bearing of an unknown stationary target. Localization performance can be analyzed by the Cramer-Rao lower bound on the estimator variance which is the same as the inverse of Fis...
Article
In this paper, a distributed protocol is proposed to solve the consensus tracking problem under heterogeneous input and communication delays. In contrast to consensus which can be achieved even without knowledge of the communication delay, tracking a general trajectory requires precise information about the individual delays. The proposed protocol...
Article
In this paper, the effect of homogeneous input delay on rendezvous of a group of agents under cyclic pursuit strategy is investigated. Presence of negative controller gain(s) aids in expanding the reachable set. It is found that at most one negative controller gain is possible for all the agents to converge under delayed condition. In contrast to a...
Article
Full-text available
This paper proposes cooperative control protocols for a group of unmanned vehicles to make a stable formation around a maneuvering target. The control protocols are proposed on the basis of heterogeneous communication networks, which represents more challenging and generalized situations. Two different scenarios are considered. Separate control pro...

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