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检索条件"主题词=Control System Design"

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control of a Concentrated Solar Power - Biogas Hybrid Unit 6

Control of a Concentrated Solar Power - Biogas Hybrid Unit

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6th Conference on Advances in control and Optimization of Dynamical systems (ACODS)

作者： Kumar, Vikas Kaistha, Nitin Indian Inst Technol Kanpur Chem Engn Kanpur 208016 Uttar Pradesh India

This work presents the design of a robust decentralized PI control system for a small scale, grid isolated concentrated solar power (CSP) biogas hybrid unit. The biogas is readily available in remote and rural areas in the developing countries and its hybridization with a CSP unit as a supplementary source of heat for enhanced power backup is an attractive option. The considered system utilizes an organic Rankine cycle (ORC) for power generation. The control system is designed to supply the user demanded power to the extent possible with appropriate override controllers to ensure safe and stable operation as the thermal energy storage (TES) approaches the high or low limits. These overrides encompass shutdown and start-up of the biogas burner firing and the ORC at low TES level as well as appropriate reduction in the captured solar flux at high TES level. Closed loop results demonstrate the robustness of the control system to very severe disturbance scenarios with the TES storage never breaching the full or empty limits. Results also show that the hybridization with biogas heating gives extra back-up varying from 1.1 h to 6 h depending on the power demand (C) 2020, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Concentrated solar power thermal energy storage control system design override control constraint control

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uavAP: AModular Autopilot Framework for UAVs

uavAP: AModular Autopilot Framework for UAVs

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AIAA Aviation Forum

作者： Theile, Mirco Dantsker, Or D. Naii, Richard Caccamo, Marco Yu, Simon Tech Univ Munich Dept Mech Engn Garching Germany Tech Univ Munich Dept Informat Garching Germany Univ Illinois Dept Elect & Comp Engn Urbana IL USA

ISBN: (数字)9781624105982

ISBN: (纸本)9781624105982

Being applied to many fields of research and industry, UAVs require reliable but modular autopilot software. An autopilot task can range from simple waypoint following to complex maneuvering or adaptive mission tracking. The developed and presented autopilot, uavAP, aims to be fully modular in a decentralized manner, embracing an object-oriented design in C++. It implements a typical control stack comprising of a mission planner, global planner, local planner, and controller. To facilitate its modularity, uavAP makes use of its core, cpsCore, for module management as well as core utilities. cpsCore administers the configuration, aggregation, and synchronization of all the modules in uavAP. With the emulation environment uavEE, uavAP forms an ecosystem for rapid prototyping and testing of modules for various research directions, ranging from scheduling and memory management, through planning and control system design, to flight profile and configuration optimization. The uavAP-uavEE ecosystem has facilitated the design of an accurate UAV power model based on the aircraft's physical model, flight maneuver automation for aircraft system identification and dynamics parametrization, and an algorithm for geo-fencing of fixed-wing UAVs. This paper describes the control stack of uavAP, its core, cpsCore, as well as application examples highlighting the framework's modularity and flexibility.

关键词： PX4 Autopilot Unmanned Aerial Vehicle C++ system Identification Rapid Prototyping control system design Flight Profile Experimental Flight Test Fixed Wing Aircraft Flight Software

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Modelling of Variable Speed Hydropower for Grid Integration Studies 21st

Modelling of Variable Speed Hydropower for Grid Integration ...

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21st IFAC World Congress on Automatic control - Meeting Societal Challenges

作者： Reigstad, T., I Uhlen, K. Norwegian Univ Sci & Technol NTNU NO-7491 Trondheim Norway

This paper proposes a hydraulic model based on the Euler turbine equations suitable for the purpose of grid integration studies of variable speed hydropower (VSHP). The work was motivated by the need to assess how the dynamic performance might change when a hydropower plant is operated at variable speed. The Euler model considers the water flow dependency on the turbine rotational speed and calculates the turbine power as a non-linear function of water flow, turbine rotational speed and guide vane opening. A waterway model is included, based on the 1-D momentum and continuity balance for a water-filled elementary pipe to simulate water hammer, mass oscillation and tunnel losses. These detailed and accurate models are necessary for recognising possible limitations in the hydraulic system, to model the turbine power and rotational speed correctly and thereby to be able to maximise power delivery for system control purposes. All Euler model parameters can be derived from the physical dimensions of the turbine and waterway, ensuring easy implementation. State-space representation of the Euler model is approximated by utilising a lumped-parameter equivalent of the penstock dynamics. Dynamic simulations and eigenvalue analysis show the strength of the Euler model compared to conventional hydropower models. Copyright (C) 2020 The Authors.

关键词： Modelling and simulation of power systems power systems stability dynamic interaction of power plants control system design control of renewable energy resources optimal operation and control of power systems

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Fatigue Load Reduction and Variable-Structure control Techniques for DFIM-based Wind Farm Scenarios 21st

Fatigue Load Reduction and Variable-Structure Control Techni...

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21st IFAC World Congress on Automatic control - Meeting Societal Challenges

作者： Cacciolatto, A. Capello, E. Wada, T. Fujisaki, Y. Politecn Torino Dept Control & Comp Engn Turin Italy Politecn Torino Dept Mech & Aerosp Engn Turin Italy Natl Res Council Italy CNR IEIIT Inst Elect Comp & Telecommun Engn Turin Italy Osaka Univ Dept Informat & Phys Sci Suita Osaka Japan

This paper proposes a trade-off approach between fatigue reduction and power extraction for wind farm scenarios, in which a simplified model for a Horizontal Axis Wind Turbine is developed. Both the aerodynamics and the electrical-mechanical model are implemented, considering a Doubly-Fed Induction Machine (DFIM). This model is controlled and connected to the grid by a back-to-back converter, composed of two bi-directional voltage source inverters . Moreover, the stator windings of the generator are directly linked to the grid and the rotor windings are connected to the grid through the power converter. The control of the VSIs is based on super-twisting sliding mode control, which guarantees robustness and low chattering effects. A wake model and an optimization problem for the reduction of the loads are included, to reduce the maximum fatigue load without compromising the power extraction. The results show a performance tracking of a desired rotational speed for the DFIMs and reduction of fatigue and damage, with a limited power reduction compared with the maximum power point tracking. Copyright (C) 2020 The Authors.

关键词： Sliding mode control Energy systems control of renewable energy resources control system design Renewable Energy system Modeling

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Active Power Regulation of a Storage Power Plant (SPP) with Voltage Angle control as Ancillary Service 21st

Active Power Regulation of a Storage Power Plant (SPP) with ...

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21st IFAC World Congress on Automatic control - Meeting Societal Challenges

作者： Gerdun, Paul Ahmed, Nayeemuddin Weber, Harald Univ Rostock Elect Energy Supply EEV D-18059 Rostock Germany

Electrical Energy Storage (EES) plays an increasingly important role to balance the intermittent power generation and demand, thus ensuring a more reliable network. An example of such an EES is the Storage Power Plant (SPP). It has been proved in previous studies that the SPP not only improves the power supply security but also reduces redispatch costs. However, its protection features against overcurrent and exceeding of its generation limit or storage capacity have not been discussed yet. In reality, such events can occur, leading to unexpected grid failures as a worst case scenario. Thus, the aim of this paper is to exhibit the behavior of a controller model which has been implemented in the SPP to protect the power plant during such situations. In this investigation, once the SPP's active power output is about to surpass its limit, the power plant automatically switches to a different mode of operation at the threshold value to prevent this from happening. In this manner, the SPP can protect itself autonomously and also helps to create a more robust system. Copyright (C) 2020 The Authors.

关键词： Energy storage Power system Stability control system design Redispatch Security

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Output Current-based Voltage Regulation of CPLs fed by dc/dc Power Converters 6

Output Current-based Voltage Regulation of CPLs fed by dc/dc...

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6th IEEE International Energy Conference (IEEE ENERGYCON) - Energy Transition for Developing Smart Sustainable Cities

作者： Papageorgiou, Panos C. Alexandridis, Antonio T. Univ Patras Dept Elect & Comp Engn Rion 26504 Greece

ISBN: (纸本)9781728129563

The inherent problem of open-loop instabilities that are created by a constant power load (CPL) is substantially analyzed and a novel control solution is proposed. The aim of the controller is to regulate the output voltage of any arbitrary CPL at desired level through a suitable feedback loop acting on the duty-ratio of a dc/dc boost converter feeding the CPL. The method is based on measurements of the output current at the CPL node, and as shown in this paper, it also needs the exact calculation of the corresponding input current of the dc/dc boost converter for any particular case. Since the latter is a cumbersome task, the input current calculation is substituted by a proportional-integral (PI) controller. Particularly, the proposed PI controller compares in his input the output voltage with its command voltage input and provides in its output the desired value of the input current. Actually, the inverse of this value is automatically approached, providing in this manner a significant degree of freedom for the whole design. The results presented in the paper for two distinct cases, one with the mean value dc/dc converter model and the other with the exact switching one, fully confirm the effectiveness of the proposed design.

关键词： CPL modeling and analysis dc/dc boost converter control system design

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Sliding Mode control with Chattering Attenuation and Hardware Constraints in Spacecraft Applications 21st

Sliding Mode Control with Chattering Attenuation and Hardwar...

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21st IFAC World Congress on Automatic control - Meeting Societal Challenges

作者： Mancini, M. Capello, E. Punta, E. Politecn Torino Dept Mech & Aerosp Engn Turin Italy Politecn Torino Natl Res Council Italy CNR IEIIT Inst Elect Comp & Telecommun Engn Turin Italy

Many practical issues should be considered when synthesizing a control system for real applications. In this paper the main objective is the evaluation of the performance of a Sliding Model controller (SMC) for spacecraft applications, in which implementation issues are included. The key features of the proposed practical design are: (i) chattering attenuation, in which an hyperbolic tangent is considered, and (ii) hardware constraints, in which a reduced SMC update frequency and saturations on the actuation system are included. A comparison between a first order and a super-twisting SMC is performed, including disturbances on the mathematical model. Moreover, computational effort and error accuracy are evaluated for both the strategies, showing the performance of the proposed implementation solutions. Copyright (C) 2020 The Authors.

关键词： Sliding mode control control system design systems with saturation Autonomous systems Non-Linear control systems Tracking

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Indirect Fuzzy Adaptive Synchronization and control of a Grid-Connected DFIG-Based WECS 4

Indirect Fuzzy Adaptive Synchronization and Control of a Gri...

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4th International Conference on control, Automation and Diagnosis (ICCAD)

作者： Labdai, S. Alibi, A. Chrifi-Alaoui, L. Drid, S. Hemici, B. Nezli, L. Univ Picardie Jules Verne Lab LTI IUT Aisne 13 Av F Mitterrand F-02880 Cuffies France Natl Polytech Sch ENP Lab Proc Control LCP 10 Av Hassen BadiBP182 Algiers Algeria Univ Batna 2 Elect Engn Dept Lab LSPIE Av Med El Hadi Boukhlof Batna Algeria

ISBN: (纸本)9781728169996

In this paper, we propose an indirect adaptive control strategy for a Doubly Fed Induction Generator (DFIG) based Wind Energy Conversion system (WECS) linked to both external loads and the electrical grid. This configuration is widely used in smart buildings when the building has a positive power it can inject the excess amount directly to the grid. Our objective is to ensure the fast-tracking and boundless of all signals in both stages of synchronization and power regulation. The proposed technic is independent of the system model and guarantees the robustness against external (load changes) and internal perturbations (speed ***.). The fuzzy adaptive system is used to estimate in real-time the nonlinear functions of the system, the control law with the proposed adaptation laws ensure the stability of the controller with the DFIG based WECS. Numerical and graphical Simulation results illustrate the efficiency of the proposed scheme for both synchronization and power control.

关键词： Intelligent control of power system control system design control of renewable energy resources Grid-connected WECS DFIG Grid-synchronization Fuzzy adaptive controller

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Voltage Stabilization of dc/dc Converter-driven Constant Power Loads via Feeding-back the Output Measured Current 21st

Voltage Stabilization of dc/dc Converter-driven Constant Pow...

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21st IFAC World Congress on Automatic control - Meeting Societal Challenges

作者： Papageorgiou, Panos C. Alexandridis, Antonio T. Univ Patras Dept Elect & Comp Engn Rion 26504 Greece

A new approach and a novel solution to the voltage control problem of a dc/dc boost converter feeding an arbitrary constant power load (CPL) is developed. Particularly, as CPLs exhibit negative incremental resistance, a fact that in combination with the nonlinear nature of a converter/CPL system creates ad hoc stability problems, a nonlinear control design is proposed with main purposes: i) to be effective on regulating the output voltage regardless of the power absorbed, ii) to be easily implemented as a feedback loop from measurable states and outputs. In the feedback loop the measurable current at the power load side is fed back diminishing the need to apply any adaptation or other complicated mechanism for estimating the power absorbed by the CPL. Hence, the proposed controller analysis is based on the complete closed-loop nonlinear model instead of using standard linearized techniques and asymptotic stability is proven by applying suitable Lyapunov methods. This design approach extends the controller validity in a wide range while in practice it can be easily realized. The stable and good performance of the controller is finally evaluated by simulations taken with various CPL levels. Copyright (C) 2020 The Authors.

关键词： Application of power electronics Power systems stability control system design

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Model Predictive controller Development for controlling Actuators of Automated Manual Transmission 21st

Model Predictive Controller Development for controlling Actu...

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21st IFAC World Congress on Automatic control - Meeting Societal Challenges

作者： Lakhera, Siddharth Sengupta, Somnath Singh, Vimlendu Indian Inst Technol Kharagpur Adv Technol Dev Ctr Kharagpur W Bengal India Indian Inst Technol Kharagpur Mech Engn Dept Kharagpur W Bengal India

Automotive transmission technology is evolving rapidly to match up with the growing need of increased power transfer efficiency, tractive demands and powertrain electrification. In this, Automated Manual Transmission (AMT) systems have made their way to the global market as popular choice by automotive industry. AMT applications have grown substantially in Hybrid Electric Vehicles, where hybrid controller decides optimum gear ratio and the gearshift needs to be automated. Advanced model-based predictive techniques for AMT supervisory controllers have allowed complex clutch control, gear shift control and optimal gear-ratio selection. However, the AMT's lower level actuator control is usually done with the help of simple linear controllers like PID. This work aims to evaluate the performance of the AMT system when using a Model Predictive controller (MPC) for controlling generic AMT actuators. This generic AMT and its control system are modeled and implemented within a HEV vehicle closed loop system model. For gearshift control problem, MPC controller is developed and implemented as actuator controller within the AMT control system framework. A simple PID based actuator controller is also developed to serve as benchmark. The comparative performance of the developed MPC and PID based controllers are evaluated by simulating them during gear-shift operation under a realistic drive cycle. Finally, suitability of MPC for the AMT actuator controller is illustrated through the obtained results. Copyright (C) 2020 The Authors.

关键词： Automated Manual Transmission Actuators Gear shift dynamics control system design Model predictive control Automotive Modeling and Simulation PID control

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