基于时变结构可靠性理论的覆冰电网风险调度

发布时间：2018-04-10 19:46

  本文选题：覆冰电网 + 时变结构可靠性　； 参考：《电网技术》2017年06期

【摘要】：冰雪灾害会严重影响电力系统的安全稳定运行。对降低覆冰期间电网的运行风险,研究覆冰线路的失效率建模与覆冰电网的调度方法有着重要的意义。在详细阐明应用静态结构可靠性理论进行覆冰线路时变失效率建模局限性的基础上,建立了基于时变结构可靠性理论的覆冰线路时变失效率模型,并研究了基于N-k场景筛选的覆冰电网风险调度方法。以IEEE RTS-79系统为例进行仿真研究,验证了所提模型与方法的有效性,分析了风险系数对调度结果的影响。仿真结果表明:静态结构可靠性与时变可靠性理论计算的覆冰线路可靠度存在较大差别;传统N-1预想故障调度方法风险较大;所提覆冰电网风险调度方法可以通过变更风险系数的取值,有效实现经济与风险的协调。
[Abstract]:Ice and snow disaster will seriously affect the safe and stable operation of power system.It is of great significance to study the modeling of the failure rate of the icing line and the dispatching method of the ice-coated power network.On the basis of expounding the limitation of time-varying failure rate modeling of icing lines based on static structural reliability theory, a time-varying failure rate model of icing lines based on time-varying structural reliability theory is established.The risk dispatching method of icing power network based on N-k scenario selection is also studied.Taking IEEE RTS-79 system as an example, the effectiveness of the proposed model and method is verified, and the influence of risk coefficient on scheduling results is analyzed.The simulation results show that the reliability of icing line calculated by static structure reliability theory and time-varying reliability theory is quite different, and the risk of traditional N-1 preconceived fault dispatching method is greater.The proposed risk dispatching method of ice-covered power network can effectively realize the coordination of economy and risk by changing the value of risk coefficient.
【作者单位】： 强电磁工程与新技术国家重点实验室(华中科技大学);浙江大学电气工程学院;电网输变电设备防灾减灾国家重点实验室(国网湖南省电力公司防灾减灾中心);
【基金】：国家自然科学基金项目(51577075)~~
【分类号】：TM73
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本文编号：1732643