ABSTRACT

The aim of this paper is in continuation with previous works of other authors, to demonstrate a methodology of analysing unbalanced operating conditions of ship electric energy systems via Millman’s theorem. Its advantages consist in being simple in implementation (either in time domain or in phasor mode) especially by non-electric power engineers, in contrast to the more complicated method via the symmetric components (or sequence networks). Furthermore, the method can be well applied to most ship electric systems, the configurations of which are not as complicated as in inland grids, e.g. with meshed loop double-circuit transmission networks, etc. The analysis covers most unbalanced case studies, i.e. single- and two-phase short-circuit faults as well as single- and two open-circuit faults.

摘要

本文的目的是延续其他作者之前的工作，展示一种通过米尔曼定理分析船舶电能系统不平衡运行条件的方法。它的优点在于实施起来很简单（无论是在时域还是在相量模式），尤其是对于非电力工程师而言，这与通过对称组件（或序列网络）的更复杂的方法形成对比。此外，该方法可以很好地应用于大多数船舶电力系统，其配置不像内陆电网那样复杂，例如网状环路双回输电网络等。分析涵盖了大多数不平衡案例研究，即单-和两相短路故障以及单相和两相开路故障。