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A Risk-Averse Just-In-Time Scheme for Learning-Based Operation of Microgrids With Coupled Electricity-Hydrogen-Ammonia Under Uncertainties

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IEEE Transactions on Sustainable Energy 2025年

作者： Li, Longyan Ning, Chao Pan, Guangsheng Zhang, Leiqi Gu, Wei Zhao, Liang Du, Wenli Shahidehpour, Mohammad Shanghai Jiao Tong University Department of Automation Shanghai200240 China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China School of Electrical Engineering Southeast University Nanjing210096 China Zhejiang Key Laboratory of Distributed Generations and Microgrid Technology State Grid Zhejiang Electric Power Research Institute Hangzhou310014 China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology China Department of Electrical and Computer Engineering Illinois Institute of Technology ChicagoIL60616 United States

This paper proposes a Risk-Averse Just-In-Time (RAJIT) operation scheme for Ammonia-Hydrogen-based Micro-Grids (AHMGs) to boost electricity-hydrogen-ammonia coupling under uncertainties. First, an off-grid AHMG model is developed, featuring a novel multi-mode ammonia synthesis process and a hydrogen-ammonia dual gas turbine with tunable feed-in ratios. Subsequently, a state-behavior mapping strategy linking hydrogen storage levels with the operation modes of ammonia synthesis is established to prevent cost-ineffective shutdowns. The proposed model substantially improves operational flexibility but results in a challenging nonlinear fractional program. Based upon this model, a data-driven RAJIT scheme is developed for the real-time rolling optimization of AHMGs. Unlike conventional one-size-fits-all schemes using one optimization method throughout, the data-driven RAJIT intelligently switches between cost-effective deterministic optimization and risk-averse online-learning distributionally robust optimization depending on actual risk profiles, thus capitalizing on the respective strengths of these two optimization methods. To facilitate the solution of the resulting nonlinear program, we develop an equivalent-reformulation-based solution methodology by leveraging a constraint-tightening technique. Numerical simulations demonstrate that the proposed scheme guarantees safety and yields an overall cost reduction up to 14.6% compared with several state-of-the-art methods. © 2025 IEEE.

关键词： Ammonia

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A framework for active fault-tolerant control of deterministic I/O automata 12th

A framework for active fault-tolerant control of determinist...

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12th IFAC/IEEE Workshop on Discrete Event Systems, WODES 2104

作者： Schmidt, Melanie Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

ISBN: (纸本)9783902823618

A method for the active fault-tolerant control (FTC) of systems modeled by deterministic input/output (I/O) automata is presented. In the fault-free case, a given controller moves the system such into a specified target state. The aim of the paper is to construct a framework which guarantees that the target state is reached again after the occurrence of a fault. For this, as usually in active FTC, two steps are performed when a fault is present: 1. Fault detection and identification, 2. Reconfiguration of the controller. In this paper, two existing methods for the fault diagnosis and the reconfiguration for I/O automata are combined in order to obtain an active and completely autonomous FTC framework. It is shown how the methods need to be modified and complemented in order to work conjointly and without any inadmissible assumptions on the results of other components. The applicability of the developed method is demonstrated by means of an example featuring a manufacturing cell. Copyright © 2014 IFAC.

关键词： Discrete event simulation

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Robust interval observer for substrate state estimation of nonlinear reactive sputter processes

Robust interval observer for substrate state estimation of n...

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2023 IEEE Conference on control Technology and Applications, CCTA 2023

作者： Schneider, Fabian Woelfel, Christian Ruhr University Institute of Automation and Computer Control Bochum44801 Germany

ISBN: (纸本)9798350335446

Process monitoring of the substrate surface condition of nonlinear, unstable, uncertain reactive sputter processes is crucial for reproducible film forming. But the substrate state is not easily measurable during deposition. This contribution proposes a new method to design a nonlinear reduced interval observer based on the Berg model including uncertain process parameters. A lower and an upper estimate are generated, and the thereby defined interval is guaranteed to contain the plant state. The input-to-state stability, the framer property and the accuracy of the interval observer are proven. Simulation studies show the applicability of the proposed design method by a narrow estimated interval width. © 2023 IEEE.

关键词： Reactive sputtering

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Active diagnosis of deterministic i/o automata

Active diagnosis of deterministic i/o automata

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4th IFAC Workshop on Dependable control of Discrete Systems, DCDS 2013

作者： Schmidt, Melanie Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

A method for the active fault diagnosis of systems modeled by sets of deterministic input/output automata is presented, where each automaton describes the behavior of the system subject to a different fault. It is shown that the system is diagnosable if and only if there are no equivalent states in different automata. An active diagnostic algorithm is presented, which generates adequate input sequences for the system and evaluates the outputs of the system in order to identify the present fault. The applicability of the developed method is demonstrated by means of an example. © 2013 IFAC.

关键词： Discrete event simulation

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Analogies in the controller design for multi-agent and physically interconnected systems with identical subsystems

Analogies in the controller design for multi-agent and physi...

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2012 20th Mediterranean Conference on control and automation, MED 2012

作者： Demir, Ozan Lunze, Jan Otte, Patrick Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

ISBN: (纸本)9781467325318

This paper considers interconnected systems consisting of identical subsystems. The subsystem interconnections are either caused by the physical relations or have to introduced by the controllers. In both cases, decomposition methods are needed to reduce the complexity of the controller design problem. The discrete-time LQR design problem for interconnected systems is considered in this paper. A decomposition approach is introduced which can be uniformly applied to both interconnection structures. It reduces the controller design for the overall system to separate design problems for the modified subsystems, which have the order of a single isolated subsystem. © 2012 IEEE.

关键词： Large scale systems

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Fault-tolerant control of nondeterministic input/output automata subject to actuator faults

Fault-tolerant control of nondeterministic input/output auto...

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作者： Nke, Y. Lunze, J. Ruhr-Universität Bochum Institute of Automation and Computer Control Germany

ISBN: (纸本)9783902661791

This paper presents concepts dealing with fault-tolerant control of discrete-event systems (DES) modeled by Input/Output (I/O) automata. It answers the question how to reconfigure the controller of a plant which is subject to actuator faults. The notion of the redundancy degree is addressed and formalized in an I/O automata framework. The reconfigurability condition which is essential in a reconfiguration scheme is investigated and a new method for checking the feasibility of a specification for a faulty system is introduced. A control design method, from which a deterministic baseline controller can be derived from a nondeterministic specification automaton, is presented. The diagnoser is assumed to be able to detect and identify actuator faults which occurred in the system. An example demonstrates the applicability of the concepts.

关键词： controllers

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Robust diagnosis using state-set observation

Robust diagnosis using state-set observation

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作者： Planchon, Philippe Lunze, Jan Ruhr-Universität Bochum Institute of Automation and Computer Control Germany

ISBN: (纸本)9783902661142

This paper describes a set-theoretic approach to robust model-based diagnosis. For systems with unknown-but-bounded uncertainties in the input and output measurements, a set-observation algorithm checks the consistency of the measurements with the model of the faultless and faulty systems in order to generate a set of fault candidates. This method is illustrated with a motor example. Copyright © 2006 IFAC.

关键词： Linear systems

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Networked Event-Based Trajectory Planning for Mobile Objects

Networked Event-Based Trajectory Planning for Mobile Objects

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作者： Schwung, Michael Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

This paper proposes an event-based method to ensure a collision-free movement of mobile objects. The objects are locally controlled and connected by a communication network. Each object possesses an event-based trajectory planning unit, which acts on a dynamical model representing the neighbouring objects together with the uncertainty of the predicted states. If a common control goal is violated due to local disturbances affecting the objects, communication to neighbouring objects is invoked. A replanning of the local trajectory based on the communicated information attenuates the disturbance. In contrast to existing literature, this approach has a lower communication effort. The effectiveness of the method is illustrated by a simulation study with two quadrotors. © 2018

关键词： Trajectories

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Direct feedback in automata networks

Direct feedback in automata networks

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作者： Neidig, Jörg Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

ISBN: (纸本)008045108X

This paper investigates the problem posed by direct feedback in automata networks. Such a feedback introduces a direct instantaneous depending of the input of a system upon itself through a signal path within the network. in continuous system theory such a feedback yields an algebraic loop, which may render the overall system ill-posed. in discrete-event system theory this problem has not been investigated in detail. This paper develops criteria to test if direct feedback exists and if the network is well-posed. Copyright © 2005 IFAC.

关键词： Automata theory

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Tracking control of Networked and Interconnected Systems

Tracking Control of Networked and Interconnected Systems

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作者： Schenk, Kai Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

Networked and interconnected systems denote a class of systems that consists of physically coupled subsystems that can exchange information via a communication network. This paper presents a new design method for tracking controllers, which guarantee that the output of each subsystem follows a specified trajectory. Each controller is synthesised by a design agent that is introduced as a local component with limited knowledge of the overall system. Each design agent uses the network to gain information that is necessary for the controller synthesis. The information exchange takes places exclusively at design time and concerns an important aspect of this work. The method presented in this paper extends classical two-degree-of-freedom controllers by decoupling units. These units are essential for achieving the desired tracking. It is proven that the proposed extension yields the desired trajectory tracking. A simulation study demonstrates the applicability. © 2018

关键词： Trajectories

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