严重灾害下特高压交直流电网风险评估方法

发布时间：2018-06-22 03:12

本文选题：特高压 + 连锁故障　；参考：《电网技术》2017年09期

【摘要】：为研究特高压交直流电网承受自然灾害的能力,基于风险评估理论,研究了适用于严重灾害下特高压交直流混合电网的安全性分析方法。首先,考虑连锁故障的全过程,提出一种基于PSD电力系统分析软件仿真的快速故障概率计算方法,计算系统在某初始故障集下的连锁故障概率;并考虑故障恢复阶段的损失,建立全过程风险评估模型;其次,从电网架构、故障状态、经济损失3个方面提出了综合指标评价体系,对系统风险进行了量化评估。最后对某地区特高压电网2种规划方案进行了风险评估,通过比较其连锁故障发展过程,并根据事故阶段和恢复阶段的风险指标计算结果,得出了优选网架规划方案,验证了研究工作的有效性。
[Abstract]:In order to study the ability of UHV AC / DC power network to withstand natural disasters, based on the risk assessment theory, the security analysis method for UHV AC / DC hybrid power network under severe disasters is studied. First of all, considering the whole process of cascading fault, a fast fault probability calculation method based on PSD power system analysis software simulation is proposed to calculate the cascading fault probability of the system under a certain initial fault set, and consider the loss of fault recovery stage. The whole process risk assessment model is established. Secondly, the comprehensive index evaluation system is put forward from three aspects of power network structure, fault state and economic loss, and the system risk is evaluated quantitatively. Finally, the risk assessment of two kinds of planning schemes for UHV power network in a certain area is carried out. By comparing the development process of cascading faults, and according to the calculated results of risk indexes in the accident stage and recovery stage, the optimal grid planning scheme is obtained. The validity of the research work is verified.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家自然科学基金项目(51277067) 电网技术国际标准研制(201510207-3)~~
【分类号】：TM721.3

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