Time-domain modeling of electromagnetic interactions in power-system transmission line networks

电力系统传输线网络中电磁相互作用的时域建模

• 批准号: 327893-2005
• 负责人: Bridges, Gregory
• 金额: $ 2.57万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2006
• 资助国家: 加拿大
• 起止时间: 2006-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=325254
• 关键词: Time; domain; modeling; electromagnetic; interactions

Reliable and high quality electric power distribution is of paramount importance to society and the Canadian economy. In a power distribution system, transmission lines are key components and their proper performance is essential to achieve the desired expectations of the power distribution network. Power-simulation software tools, such as PSCAD/EMTDC which is developed by the Manitoba Hydro HVDC Research Centre, and used throughout the world, play a crucial role in design and maintenance of a power system. These simulation tools require accurate and efficient models for transmission lines. In this research proposal, we tackle the problem of how to accurately model frequency-dependent and/or non-uniform multiconductor transmission lines, how to incorporate them within a time-domain simulation code, and how to model the effects of external-field coupling to and electromagnetic radiation from transmission lines. To accomplish this, a novel model based on a finite-difference time-domain approach will be developed and integrated within the power-system simulator. This model will be capable of simulating multiconductor transmission lines with frequency-dependent parameters. It will also have the intrinsic feature of being able to include external-field coupling, such as that from lightning. To complement this capability, an algorithm for accurate determination of the transient fields from a lightning return stroke will be developed. The issue of passivity for this model and existing models will also be addressed, as well as methods for per-unit-length parameter extraction, which is important for buried-cable studies. The combination of these aspects will provide a new class of power-system transmission line models that can be integrated into the PSCAD/EMTDC framework or other time-domain circuit simulator.

可靠和高质量的电力分配对社会和加拿大经济至关重要。在配电系统中，输电线路是关键部件，其适当的性能对于实现配电网络的期望是必不可少的。功率仿真软件工具，如由马尼托巴水电直流输电研究中心开发的PSCAD/EMTDC，在世界各地使用，在电力系统的设计和维护中起着至关重要的作用。这些仿真工具需要准确和有效的传输线模型。在这项研究建议中，我们解决的问题是如何准确地模拟频率相关和/或非均匀多导体传输线，如何将它们纳入时域仿真代码，以及如何模拟外场耦合和电磁辐射的影响传输线。为了实现这一点，一个新的模型的基础上，时域有限差分法将开发和集成的电力系统仿真器。该模型将能够模拟多导体传输线与频率相关的参数。它还将具有能够包括外部场耦合的内在特征，例如来自闪电的耦合。为了补充这一能力，将开发一种算法，用于精确确定闪电回击的瞬态场。该模型和现有模型的无源性问题也将得到解决，以及每单位长度参数提取的方法，这是重要的埋地电缆的研究。这些方面的结合将提供一类新的电力系统传输线模型，可以集成到PSCAD/EMTDC框架或其他时域电路仿真器。