紧凑型输电线路非同期摇摆特性分析及防治措施

Asynchronous Swaying Character and Prevention Measures in the Compact Overhead Transmission Line

为了解决紧凑型输电线路中相间非同期摇摆引起的风偏闪络问题,结合线路运行经验,建立了导线系统的计算模型,并利用无条件稳定Newmark法与荷载增量法,研究了不同风荷载激励模型非同期摇摆的非线性动力学响应问题,得到了紧凑型线路非同期摇摆特性,给出了相间间隔棒的配置方案。研究结果表明,该荷载模型计算结果与线路运行经验吻合,非同期摇摆闪络故障防治方案能够保证线路的安全稳定运行。研究结果为紧凑型输电线路的风偏闪络设计提供了理论依据,而且在保障线路安全稳定运行的情况下,采用组合风模型的设计可合理地减少相间间隔棒安装数量,降低工程造价。

Aiming to the issue of windage yaw flashover fault caused by asynchronous swaying between the phases in compact overhead transmission line,the calculation model of conductor system was set up through the combined wind load model and operating experience of transmission lines.By using the unconditional stable Newmark method and load-increment method,the nonlinear dynamic response for asynchronous swaying in compact transmission lines was researched.The character of asynchronous swaying was obtained after analyzing the conductor nonlinear response of different wind load model,and the corresponding prevention measures and configuration of interphase spacers was given.The research results indicate that there is a better consistency between the calculation results with operation experiences;the prevention measures of control asynchronous swaying are effective,and ensure the safe and stable operation of transmission line.The result can provide the design foundation for the windage yaw flashover of the compact transmission,and the design based on combinatory wind model can reduce the configuration number of interphase spacers and line project cost.