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基于潮流熵测度的连锁故障脆弱线路评估及其在四川主干电网中的应用

ISSN号：1006-6047
期刊名称：电力自动化设备
时间：2013
页码：40-46
分类：TM711[电气工程—电力系统及自动化]
作者机构：[1]四川大学电气信息学院四川省智能电网重点实验室,四川成都610065, [2]四川省电力公司,四川成都610061
相关基金：国家自然科学基金资助项目（50977059）;四川省产业发展重大技术项目（2011GZ0225）
相关项目：电力系统连锁故障的能量演变特征及其防御策略研究

关键词：电力系统, 脆弱性, 连锁故障, 潮流分布熵, 潮流转移熵, 模型, electric power systems, vulnerability, cascading failures, distribution entropy of power flow, transfer entropy of power flow, models

中文摘要：

运用熵的基本原理．结合电网扰动下线路潮流转移和分布特性。提出线路潮流转移熵和线路潮流分布熵的概念。针对不同运行状态下电网脆弱环节的转移特点和过负荷与故障断线扰动下线路潮流熵的变化特点．考虑电网实时运行风险，提出基于潮流熵的脆弱评估模型。IEEE30节点系统仿真结果验证了所提方法的可靠性和全面性。丰大和枯大方式下四川主干网应用表明．潮流分布熵越大、潮流转移熵越小的线路过负荷冲击脆弱度越大：潮流负载较重、运行故障率高、潮流转移熵较小的线路故障断线风险脆弱度高：丰大、枯大期电网的脆弱环节发生转移：基于潮流熵的电网综合脆弱线路与电网实际薄弱环节相吻合。

英文摘要：

Based on the entropy theory and combined with the characteristics of power flow transfer and distribution of transmission lines,the concepts of transfer entropy and distribution entropy of transmission line power flow are proposed. According to the transfer characteristics of power grid weak links in different operating conditions and the change characteristics of power flow entropy under the disturbances of overload and line break,a vulnerability assessment model based on power flow entropy is proposed for transmission lines with the consideration of real time operational risk of power grid. The simulative results of IEEE 30- bus system show the reliability and comprehensiveness of the proposed method. Its application in Sichuan backbone power grid during high and low flow periods show that,the line with higher power distribution entropy and smaller power flow transfer entropy has bigger overload vulnerability;the line with heavier power flow load,higher operational fault rate and smaller power flow transfer entropy has bigger line break vulnerability;the vulnerable links of high flow period are different to those of low flow period,and the comprehensive vulnerable lines based on power flow entropy is consistent with the actual weak links of power grid.

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