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A Delay-dependent Dynamic Wide Area Damping Controller for Renewable Energy Integrated Power System Resilient to Communication Failure

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 577-588页

作者： Anirban Sengupta Dushmanta Kumar Das bidyadhar subudhi Department of Electrical and Electronics Engineering Sikkim Manipal Institute of TechnologySMUSIkkim737136 India Department of Electrical and Electronics Engineering National Institute of TechnologyNagalandDimapur797103 India School of Electrical Science Indian Institute of TechnologyGoaIndia

Integration of renewable energy sources(RES)with a conventional power system has a detrimental effect on interarea *** popular RESs are solar photovoltaic(PV)and wind energy conversion systems(WECS).Both solar PV power generation and WECS are integrated with power systems using a power electronic *** the amount of RES generation lead towards reduction of system damping,which leads towards inter-area ***,the intermittent behavior of a RES reduces the effectiveness of damping controllers.A dynamic controller based wide area damping controller(WADC)is proposed in this paper to increase small signal stability of a RES integrated power *** WADC is designed for contemplating delay in a communication channel,communication failure and *** anti-windup compensator is developed to overcome the effect of actuator ***,the gain of the anti-windup compensator is calculated using LyapunovKrasovskii functional(LKF)in terms of linear matrix inequality(LMI).The actuator considered in this paper is a unified power flow controller(UPFC).Efficacy of PV and wind power integration on power system is also *** efficacy of the developed dynamic controller is verified using IEEE 39 bus and 68 bus power system.

关键词： Actuator saturation communication failure linear matrix inequality renewable energy sources time delay wide area damping control

Forecasting Global Solar Insolation Using the Ensemble Kalman Filter Based Clearness Index Model

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1087-1096页

作者： Pravat Kumar Ray bidyadhar subudhi Ghanim Putrus Mousa Marzband Zunaib Ali Department of Electrical Engineering National Institute of Technology RourkelaRourkela-769008India School of Electrical Sciences Indian Institute of Technology GoaGoa 403401India Department of Maths Physics and Electrical EngineeringNorthumbria UniversityUK

This paper describes a novel approach in developing a model for forecasting of global insolation on a horizontal *** the proposed forecasting model,constraints,such as latitude and whole precipitable water content in vertical column of that location,are *** parameters can be easily measurable with a global positioning system(GPS).The earlier model was developed by using the above datasets generated from different locations in *** model has been verified by calculating theoretical global insolation for different sites covering east,west,north,south and the central region with the measured values from the same *** model has also been validated on a region,from which data was not used during the development of the *** the model,clearness index coefficients(KT)are updated using the ensemble Kalman filter(EnKF)*** forecasting efficacies using the KT model and EnKF algorithm have also been verified by comparing two popular algorithms,namely the recursive least square(RLS)and Kalman filter(KF)*** minimum mean absolute percentage error(MAPE),mean square error(MSE)and correlation coefficient(R)value obtained in global solar insolation estimations using EnKF in one of the locations are 2.4%,0.0285 and 0.9866 respectively.

关键词： Clearness index ensemble Kalman filter extra-terrestrial irradiance forecasting global solar insolation

A Delay-Dependent Anti-Windup Compensator for Wide-Area Power Systems With Time-Varying Delays and Actuator Saturation

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 106-117页

作者： Maddela Chinna Obaiah bidyadhar subudhi Department of Electrical Engineering National Institute of TechnologyRourkela 769008India School of Electrical Sciences Indian Institute of TechnologyFarmagudiGoa 403401India

In this paper, a delay-dependent anti-windup compensator is designed for wide-area power systems to enhance the damping of inter-area low-frequency oscillations in the presence of time-varying delays and actuator saturation using an indirect approach. In this approach, first, a conventional wide-area damping controller is designed by using output feedback with regional pole placement approach without considering time-varying delays and actuator saturation. Then to mitigate the effect of both time-varying delays and actuator saturation, an add-on delay-dependent anti-windup compensator is designed. Based on generalized sector conditions, less conservative delay-dependent sufficient conditions are derived in the form of a linear matrix inequality(LMI) to guarantee the asymptotic stability of the closedloop system in the presence of time-varying delays and actuator saturation by using Lyapunov-Krasovskii functional and Jensen integral inequality. Based on sufficient conditions, the LMI-based optimization problem is formulated and solved to obtain the compensator gain which maximizes the estimation of the region of attraction and minimizes the upper bound of-gain. Nonlinear simulations are performed first using MATLAB/Simulink on a two-area four-machine power system to evaluate the performance of the proposed controller for two operating conditions, e.g.,3-phase to ground fault and generator 1 terminal voltage variation. Then the proposed controller is implemented in real-time on an OPAL-RT digital simulator. From the results obtained it is verified that the proposed controller provides sufficient damping to the inter-area oscillations in the presence of time-varying delays and actuator saturation and maximizes the estimation of the region of attraction.

关键词： Index Terms—Anti-windup compensator actuator saturation,FACTS devices H∞controller inter-area oscillations LMI time delay.

Position Control of a Flexible Manipulator Using a New Nonlinear Self-Tuning PID Controller

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 136-149页

作者： Santanu Kumar Pradhan bidyadhar subudhi School of Electrical Sciences National Institute of Science and Technology BerhampurOdisha 761008India School of Electrical Sciences Indian Institute of TechnologyFarmagudiGoa 403401India

In this paper, a new nonlinear self-tuning PID controller(NSPIDC) is proposed to control the joint position and link deflection of a flexible-link manipulator(FLM) while it is subjected to carry different payloads. Since, payload is a critical parameter of the FLM whose variation greatly influences the controller performance. The proposed controller guarantees stability under change in payload by attenuating the non-modeled higher order dynamics using a new nonlinear autoregressive moving average with exogenous-input(NARMAX) model of the FLM. The parameters of the FLM are identified on-line using recursive least square(RLS) algorithm and using minimum variance control(MVC) laws the control parameters are updated in real-time. This proposed NSPID controller has been implemented in real-time on an experimental set-up. The joint tracking and link deflection performances of the proposed adaptive controller are compared with that of a popular direct adaptive controller(DAC). From the obtained results, it is confirmed that the proposed controller exhibits improved performance over the DAC both in terms of accurate position tracking and quick damping of link deflections when subjected to variable payloads.

关键词： Index Terms—Flexible-link manipulator position control selftuning control NARMAX trajectory tracking

Unified Smith Predictor Based H_∞ Wide-Area Damping Controller to Improve the Control Resiliency to Communication Failure

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 584-596页

作者： Mithu Sarkar bidyadhar subudhi Sandip Ghosh G H Raisoni College of Engineering Nagpur 440016India Indian Institute of Technology Goa-403401India Indian Institute of Technology Banaras Hindu University(BHU)Varanasi 221005India

Inter-area low frequency oscillation in power system is one of the major problems for bulk power transmission through weak tie *** of wide-area signal is more effective than the local area signal in damping out the inter-area *** area measurement system(WAMS)is convenient to transmit the wide area signal through the communication channel to the remote *** failure is one of the disastrous phenomena in a communication *** this paper,a dual input single output(DISO)Hm controller is designed to build the control resiliency by employing two highest observability ranking wide area signals with respect to the critical damping inter-area *** proposed controller can provide sufficient damping to the system and also the system remains stabilized if one of the wide-area signals is *** time delay is an unwanted phenomenon that degrades the performance of the *** unified Smith predictor approach is used to design a Hm controller to handle the time ***'s two-area and IEEE-39 bus test systems are considered to verify the effectiveness of the proposed *** the simulation results,it is verified that,the proposed controller provides excellent damping performance at normal communication and improves the controller resiliency to counteract the communication failure.

关键词： Communication failure dual input single output(DISO)controller H_∞control inter-area oscillation unified Smith predictor

Design of a Robust Optimal Decentralized PI Controller Based on Nonlinear Constraint Optimization For Level Regulation: An Experimental Study

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 187-199页

作者： Soumya Ranjan Mahapatro bidyadhar subudhi Sandip Ghosh Department of Electrical Engineering National Institute of Technology RourkelaRourkela 769008India School of Electrical Sciences Indian Institute of TechnologyFarmagudiGoa 403401India Department of Electrical Engineering Indian Institute of TechnologyVaranasi 221005India

This paper presents the development of a new robust optimal decentralized PI controller based on nonlinear optimization for liquid level control in a coupled tank system. The proposed controller maximizes the closed-loop bandwidth for specified gain and phase margins, with constraints on the overshoot ratio to achieve both closed-loop performance and robustness. In the proposed work, a frequency response fitting model reduction technique is initially employed to obtain a first order plus dead time(FOPDT) model of each higher order subsystem. Furthermore, based on the reduced order model, a proposed controller is designed. The stability and performance of the proposed controller are verified by considering multiplicative input and output uncertainties. The performance of the proposed optimal robust decentralized control scheme has been compared with that of a decentralized PI controller. The proposed controller is implemented in real-time on a coupled tank system. From the obtained results,it is shown that the proposed optimal decentralized PI controller exhibits superior control performance to maintain the desired level, for both the nominal as well as the perturbed case as compared to a decentralized PI controller.

关键词： Index Terms—Decentralized control multivariable system process control parameter uncertainty robustness

Adaptive Tracking Control of an Autonomous Underwater Vehicle

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International Journal of Automation and computing 2014年第3期11卷 299-307页

作者： Basant Kumar Sahu bidyadhar subudhi Centre for Industrial Electronics and Robotics Department of Electrical Engineering National Institute of Technology

This paper presents the trajectory tracking control of an autonomous underwater vehicle(AUV). To cope with parametric uncertainties owing to the hydrodynamic effect, an adaptive control law is developed for the AUV to track the desired trajectory. This desired state-dependent regressor matrix-based controller provides consistent results under hydrodynamic parametric *** of the developed controller is verified using the Lyapunov s direct method. Numerical simulations are carried out to study the efficacy of the proposed adaptive controller.

关键词： Autonomous underwater vehicle(AUV) adaptive control law regressor matrix Lyapunovs stability path following

Modified constrained adaptive formation control scheme for autonomous underwater vehicles under communication delays

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IET Cyber-Systems and Robotics 2020年第1期2卷 22-30页

作者： Chhavi Suryendu bidyadhar subudhi Department of Electrical Engineering National Institute of Technology RourkelaRourkelaOdisha 769008India School of Electrical Sciences Indian Institute of TechnologyGoaGoa-403401India

The performance of a formation control algorithm for a group of autonomous underwater vehicles(AUVs)may be degraded due to communication constraints between the leader and the follower ***,as the distance between the AUVs change due to ocean waves,the delay in communication also *** this study,a modified constrained adaptive controller(CAC)is proposed to resolve the issue of variable-delay as well as actuator *** to the on-line reduction of the cost function,the gains of the CAC are updated at each sampling time taking into account the effects of communication *** improves the path-following accuracy of the leader AUV as well as follower *** effectiveness of the proposed control algorithm is demonstrated by implementing it on a prototype AUV(ODRA-I)*** obtained simulation and experimental results show that the follower AUVs maintain a desired distance from the leader AUV to avoid a *** the proposed algorithm,the desired path-following performance of the follower AUV is maintained even when the delay is changed from 0 to 5 ***,the proposed control algorithm is efficient in avoiding actuator saturation.

关键词： communication underwater autonomous

An Improved Differential Evolution Trained Neural Network Scheme for Nonlinear System Identification

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International Journal of Automation and computing 2009年第2期6卷 137-144页

作者： bidyadhar subudhi Debashisha Jena Center for Industrial Electronics & Robotics Department of Electrical Engineering National Institute of Technology

This paper presents an improved nonlinear system identification scheme using di？erential evolution （DE）, neural network （NN） and Levenberg Marquardt algorithm （LM）. With a view to achieve better convergence of NN weights optimization during the training, the DE and LM are used in a combined framework to train the NN. We present the convergence analysis of the DE and demonstrate the efficacy of the proposed improved system identification algorithm by exploiting the combined DE and LM training of the NN and suitably implementing it together with other system identification methods, namely NN and DE＋NN on a number of examples including a practical case study. The identification results obtained through a series of simulation studies of these methods on different nonlinear systems demonstrate that the proposed DE and LM trained NN approach to nonlinear system identification can yield better identification results in terms of time of convergence and less identification error.

关键词： Differential evolution neural network (NN) nonlinear system identification Levenberg Marquardt algorithm