Modelling of switching systems in bond graphs using the concept of switched power junctions

Umarikar, Amod C.; Umanand, L.

doi:10.1016/j.jfranklin.2004.08.005

Cited by 64 publications

(41 citation statements)

References 5 publications

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“…Such switches are also needed to model the circuit breakers that connect the generators to the power grid. In [22] a design for such switches are proposed and derived using bond graph theory.…”

Section: Discrete Switchesmentioning

confidence: 99%

A real-time simulator framework for marine power plants with weak power grids

Skjong

Pedersen

2017

Mechatronics

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This work takes aim at presenting a generic real-time simulation framework for marine power plants with weak power grids, containing transient functionalities such as starting and stopping of arbitrary generators, and phase synchronization. The generator models used in the power plant are hybrid causality models, meaning that they have the ability to switch between causality orientations, between voltage and current. These models facilitate real-time simulations as long as they are solved properly, as will be discussed in this article. Much is devoted to numerical stability, model robustness and power plant control, e.g. rms voltage control, engine speed control, active-and reactive power sharing control and phase synchronization control. Some focus is also given to overall power plant control structure. A case study of a marine power plant including two generators and a fluctuating-and noisy power consumption is presented and analysed, and illustrates the advantages of the proposed framework as well as giving a good foundation for future works.

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Section: Discrete Switchesmentioning

confidence: 99%

A real-time simulator framework for marine power plants with weak power grids

Skjong

Pedersen

2017

Mechatronics

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“…In order to account for the abstraction of ideal, no power consuming switching in a bond graph with invariant causalities that holds for all system modes, Umarikar extended 0-and 1-junctions by allowing for more than one bond to impose an effort on a 0-junction and more than one bond imposing a flow on a 1-junction with the constraint that only one of the causality imposing bonds is active at a time instant [12,13]. These extensions are called switched power junctions and are not to be confused with controlled junctions to be referred to subsequently.…”

Section: Switched Power Junctions (Spjs)mentioning

confidence: 99%

Bond Graph Representations of Hybrid System Models

Borutzky

2014

Bond Graph Model-Based Fault Diagnosis of Hybrid Systems

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This chapter addresses the modelling abstraction of fast dynamic state transitions into instantaneous discrete state changes and its consequences and surveys various bond graph representations of hybrid system models proposed in the literature. The bond graph model-based quantitative approach to FDI in hybrid systems presented in Chap. 4 uses a bond graph representation with system mode independent computational causalities. As a result, a single set of equations in the form of a DAE system can be derived that holds for all system modes. The chapter concludes by addressing the index of the DAE system as it is an information that is relevant with regard to a symbolic and numerical processing of the DAE system.

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“…The disadvantage of this approach is that one needs to reassign the causality if the switching happens. To handle this problem, a concept of switched power junction is developed to represent switching phenomena in systems [36,37]. The switched power junction (SPJ) models ideal switching, so that the problem of stiff systems and associated numerical stability problems while simulating the system are eliminated.…”

Section: Hybrid Bond Graphmentioning

confidence: 99%