【作者】

Juho Könnö

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC大会上发表，论文的版权归CIMAC所有。ABSTRACT In field operations, generating sets are often subject to highly fluctuating loading conditions and anomalous phenomena imposed on the generator by the electric grid. Examples of such events are unstable grids with possible short circuits, heavily varying loading in peaking power plants, or frequency fluctuations. On the other hand, in a marine operating environment, the internal grid of the vessel is rather small, also leading to highly fluctuating loading conditions, in particular in special applications. To ensure robust operation in such a harsh environment, testing has been traditionally the preferred validation methodology. However, with the continuous improvement of simulation tools, more and more complex systems are within the scope of virtual validation. A clear benefit of virtual validation of such transient loading conditions is the easy adaptability of the simulation also to hard-to-test loading conditions at very little cost. Thus the engine can be optimized always for the loading conditions of the final customer destination even before leaving the factory, guaranteeing fault-free operation from the beginning. The methodology described in this paper allows us to directly check the stress response of a given engine component due to a load fluctuation in the network with a multibody dynamics model coupled to an electric model of the generator and also a model of the electric grid. Additionally, by coupling the engine automation system to control the gas pressure given as an input to the multibody model, we can easily simulate transient phenomena, such as starting and stopping the engine. As a demonstrator, we present a multibody model of a generating set, including a model of the electric machine coupled to an automation model for controlling the firing pressure. With such a setup, we can demonstrate how the whole generating set responds to predefined network events, such as short circuits. The goal of this paper is to give the reader an introduction into the possibilities of coupling electrical and automation system models to flexible multibody dynamics to enhance and optimize the engine design for varying loading conditions.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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