防止输电断面连锁过载的快速控制算法
发布时间：2019-06-14 10:53
【摘要】：切除过载支路可能会引发相关输电断面内连锁过载,应在过载保护延时动作时限内,采取快速控制措施消除过载。文中保护对象为断面整体,保证降低断面整体潮流的同时断面内无支路过载。现有改进算法的综合灵敏度计算或忽略正常支路,或仅为过载线路及接近极限线路灵敏度的代数和,不能更为合理地体现节点消除断面整体过载的能力;且其节点优先级划分及调整节点对选择、调整量约束条件仍不完善。文中继承了现有综合灵敏度算法的总体思想并加以改进,认为综合灵敏度应为断面内过载支路与正常支路灵敏度的加权和,以此对控制节点进行分类和排序;划分节点优先级时综合考虑节点对支路的灵敏度及断面的综合灵敏度;根据反向等量配对法选择调整节点对时增加"保证断面整体安全"原则,且增加平衡机出力的处理避免越限;完善调整量约束条件,加入潮流反向约束避免调整量过大时潮流反向增长。对某省电网系统的仿真计算表明了算法的快速有效性。
[Abstract]:The removal of overload branch may lead to chain overload in the relevant transmission section, so fast control measures should be taken to eliminate overload within the time limit of overload protection delay operation. In this paper, the protection object is the whole section to ensure that the overall power flow of the section is reduced and there is no branch overload in the section. The comprehensive sensitivity calculation of the existing improved algorithm either ignores the normal branch, or is only the algebra sum of the sensitivity of the overload line and the limit line, which can not more reasonably reflect the ability of the node to eliminate the overall overload of the section, and the node priority division and the adjustment of the node pair selection, the adjustment constraint conditions are still not perfect. In this paper, the overall idea of the existing comprehensive sensitivity algorithm is inherited and improved, and it is considered that the comprehensive sensitivity should be the weighted sum of the sensitivity of the overload branch and the normal branch in the section, so as to classify and sort the control nodes, and consider the sensitivity of the node to the branch and the comprehensive sensitivity of the section when dividing the priority of the nodes. According to the reverse equal matching method, the principle of "ensuring the overall safety of the section" is added when the node pair is adjusted, and the output of the balancer is increased to avoid exceeding the limit; the constraint conditions of the adjustment quantity are improved, and the reverse constraint of the power flow is added to avoid the reverse growth of the power flow when the adjustment quantity is too large. The simulation results of a provincial power grid system show that the algorithm is fast and effective.
【作者单位】： 西安交通大学电气工程学院;国家电网许继集团有限公司;
【基金】：国家电网公司科技项目“适应变电站-网架形态演变趋势的新架构保护关键技术研究与开发”~~
【分类号】：TM744
本文编号：2499337
[Abstract]:The removal of overload branch may lead to chain overload in the relevant transmission section, so fast control measures should be taken to eliminate overload within the time limit of overload protection delay operation. In this paper, the protection object is the whole section to ensure that the overall power flow of the section is reduced and there is no branch overload in the section. The comprehensive sensitivity calculation of the existing improved algorithm either ignores the normal branch, or is only the algebra sum of the sensitivity of the overload line and the limit line, which can not more reasonably reflect the ability of the node to eliminate the overall overload of the section, and the node priority division and the adjustment of the node pair selection, the adjustment constraint conditions are still not perfect. In this paper, the overall idea of the existing comprehensive sensitivity algorithm is inherited and improved, and it is considered that the comprehensive sensitivity should be the weighted sum of the sensitivity of the overload branch and the normal branch in the section, so as to classify and sort the control nodes, and consider the sensitivity of the node to the branch and the comprehensive sensitivity of the section when dividing the priority of the nodes. According to the reverse equal matching method, the principle of "ensuring the overall safety of the section" is added when the node pair is adjusted, and the output of the balancer is increased to avoid exceeding the limit; the constraint conditions of the adjustment quantity are improved, and the reverse constraint of the power flow is added to avoid the reverse growth of the power flow when the adjustment quantity is too large. The simulation results of a provincial power grid system show that the algorithm is fast and effective.
【作者单位】： 西安交通大学电气工程学院;国家电网许继集团有限公司;
【基金】：国家电网公司科技项目“适应变电站-网架形态演变趋势的新架构保护关键技术研究与开发”~~
【分类号】：TM744
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