Modeling electromagnetic emission and susceptibility problems in power transmission-line networks

电力传输线网络中的电磁辐射和磁化率问题建模

• 批准号: 327714-2006
• 负责人: Kordi, Behzad
• 金额: $ 2.08万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=397935
• 关键词: Modeling; electromagnetic; emission; susceptibility; problems

Increasing demand for high-quality and reliable electric power, as well as the advent of new broadband data transmission technologies that employ the electric-power infrastructure have raised important Electromagnetic Compatibility (EMC) issues. EMC specialists are essentially concerned with two problems involving power transmission and distribution systems: undesired electromagnetic emissions, and susceptibility to external sources of electromagnetic energy. Firstly, transmission of broadband data, such as Internet, over unshielded low- and medium-voltage power lines which have not been primarily designed for this application results in uncontrolled radiated emission. Secondly, power transmission and distribution networks, especially transmission lines, are vulnerable to transient electromagnetic radiation emitted from external sources. Indirect lightning strikes are considered one of the important sources of such energy that can induce over-voltages in overhead lines and underground cables. Simulation of lightning-induced over-voltages and electromagnetic emissions from power lines carrying broadband data share a common theoretical background. They both require accurate and efficient models for the propagation of electromagnetic fields in lossy media. The proposed research aims at developing various techniques and high-frequency models for simulating electromagnetic emission and susceptibility problems experienced in power-system transmission-line networks. Modeling the frequency dependence of the transmission-line parameters, the inclusion of ground loss within the models, and integrated macro-models for accurate and efficient calculation of lightning-induced electromagnetic fields are the distinguishing features that make the problem difficult but are necessary because of their significant impact on the accuracy of the simulation results and the efficiency of the developed techniques.

对高质量和可靠电力的需求不断增长，以及采用电力基础设施的新型宽带数据传输技术的出现，引发了重要的电磁兼容性 (EMC) 问题。 EMC 专家主要关注涉及输电和配电系统的两个问题：不良电磁辐射以及对外部电磁能源的敏感性。首先，通过非屏蔽低压和中压电力线传输宽带数据（例如互联网）主要不是为此应用而设计的，会导致不受控制的辐射发射。其次，输配电网络，特别是输电线路，容易受到外部源发出的瞬态电磁辐射的影响。间接雷击被认为是这种能量的重要来源之一，可以在架空线路和地下电缆中感应出过电压。雷击引起的过电压和承载宽带数据的电力线的电磁辐射的模拟具有共同的理论背景。它们都需要有损介质中电磁场传播的准确且有效的模型。拟议的研究旨在开发各种技术和高频模型来模拟电力系统传输线网络中遇到的电磁辐射和敏感性问题。对传输线参数的频率依赖性进行建模、在模型中包含接地损耗以及用于精确有效计算雷电感应电磁场的集成宏观模型是使问题变得困难的显着特征，但也是必要的，因为它们对模拟结果的准确性和所开发技术的效率具有重大影响。