Investigation on the spatial arc resistance distribution of switching arcs in gas filled high voltage circuit breakers

充气高压断路器操作电弧空间电弧电阻分布研究

• 批准号: 163482480
• 负责人: Professor Dr.-Ing. Armin Schnettler
• 金额: --
• 依托单位: Siemens AG
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/163482480?language=en
• 关键词: Investigation; spatial; arc; resistance; distribution

In the field of high voltage circuit breakers self-blast circuit breakers filled with sulphur hexa fluoride (SF6) are state of the art. They are used for switching electric circuits of the high voltage power supply systems. As these breakers serve as protective components, they are required tointerrupt nominal currents as well as short circuit currents in case of a failure.Due to the high global warming potential of SF6, alternative gases are investigated aiming for economic and ecologic advantages. One possible substitute is carbon dioxide (CO2). It is necessary to investigate, if this substitute can be used and whether the design of a SF6 circuit breaker has to be changed for an optimal switching performance of a CO2 circuit breaker. A deep understanding of both the physical processes and the mathematical models, which can be applied on different gases,are required in order to save time and costduring intensive experimental tests of such a development process. This helps to improve the design of circuit breakers, which were initially optimized for SF6,for alternative gases.State of the art simulation tools for circuit breaker development and design are designed for investigating SF6 breakers with conventional geometric assemblies. As they are configured via an ex-post view on experiments they cannot be applied to alternative assemblies and gases. Hence the measurement system, which has been developed in the first project, shall be used for investigating the arcing behaviour for different gases and flow conditions. This information can be used to derive suitable simulation models. These models shall in particular be able to enhance the development of circuit breakers with SF6 substitutes. Up to now state of the art simulation tools are not able to calculate the different cooling mechanisms of CO2 in contrast to the mechanisms of SF6. In addition to the applicability of the models for different gas alternatives, the customization of breaker geometry for the quenching gas is of vital importance.Using the previous investigations as well as the developed measurement system as a basis for further parameter variations, the physical processes during the switching process of a circuit breaker can be better understood. Hence this understanding can be implemented in numerical models. Next to the variation of the nozzle-geometry and the quenching gas pressure the main focus is on the variation of the blowing gas. For instance the gases SF6, CO2 and air shall be used for the investigations. The derived simulation models are required to be applicable for the development of non-SF6 circuit breakers.

在高压断路器的领域中，充满硫六氟化物（SF6）的自燃量断路器是最新的。它们用于切换高压电源系统的电路。由于这些断路器充当保护性组件，因此需要在失败的情况下使它们的标称电流以及短路电流。一种可能的替代品是二氧化碳（CO2）。是否必须使用此替代品以及是否必须更改SF6断路器的设计才能进行调查，以使CO2断路器的最佳切换性能进行更改。为了节省时间和成本量的强化实验测试，对可以应用于不同气体的物理过程和数学模型的深入了解。这有助于改善最初针对SF6优化的断路器的设计，用于替代气体。用于断路器开发和设计的ART仿真工具的设计旨在研究具有常规几何组件的SF6断路器。由于它们是通过实验的前柱视图配置的，因此不能将其应用于替代的组件和气体。因此，应在第一个项目中开发的测量系统用于研究不同气体和流量条件的弧行为。该信息可用于得出合适的仿真模型。这些模型尤其应能够通过SF6替代品增强断路器的发展。到现在为止，与SF6的机制相比，直到现在，最先进的仿真工具无法计算CO2的不同冷却机制。除了模型在不同气体替代方案中的适用性外，对淬灭气体的断路器几何形状的定制至关重要。使用先前的研究以及开发的测量系统作为进一步参数变化的基础，可以更好地理解断路器切换过程中的物理过程。因此，这种理解可以在数值模型中实现。在喷嘴几何体和淬火气压的变化旁边，主要重点是吹气的变化。例如，气体SF6，CO2和空气应用于调查。派生的仿真模型必须适用于非SF6断路器的开发。