Key line identification method for two types of roles in transmission network based on symmetric entropy
A technology for key lines and transmission lines, applied in data processing applications, instruments, calculations, etc., to solve problems such as the inability to effectively distinguish between the two roles of transmission lines
Active Publication Date: 2021-09-17
JIANGXI SCI & TECH NORMAL UNIV
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[0005] The purpose of the present invention is to provide a key line identification method for two types of roles in the transmission network based on symmetric entropy, which solves the problem that the existing identification methods cannot effectively distinguish the two types of roles of the transmission line, making the evaluation more refined
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[0048] to attach image 3 The IEEE 39 node system diagram is an example to describe the present invention in detail, the system has 39 busbar nodes, 46 lines and 10 generators; the information data of the input IEEE 39 node system includes: the input power when the generator is running normally, System load data, line reactance and maximum transmitted power ( P M1 , P M2 ,…, P M46 ), the bus node type, number the lines 1, 2,..., 46; calculate the DC power flow of the transmission network, and obtain the active power values of the 46 lines when the transmission line is in normal operation; use the maximum transmission power of the line and the normal operation active power, through a i =| P i | / P Mi ( i =1,2,…,46) respectively calculate the evaluation quantization values of 46 lines under normal operation; use the easy-to-spread power quantization set={ a 1 , a 2 ,…, a N }\ a i ( i =1,2,...,46) calculate the easily propagated power quantization sets of ...
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A key line identification method for two types of roles in a transmission network based on symmetric entropy. The steps are to obtain relevant data information of the transmission network; establish a power evaluation quantification set of two types of roles that are easy to spread and easy to infect when the transmission line is in normal operation; establish The power evaluation quantification set of the two types of roles that are easy to spread and easy to infect when the transmission line is in fault operation; construct the symmetric entropy formula to identify the two types of roles that are easy to spread and easy to infect in the transmission network; use the symmetric entropy to identify the two types that are easy to spread and easy to infect in the transmission network The key line of the character. The present invention distinguishes the two types of roles of the key lines, easy to spread and easy to infect, by constructing symmetric entropy. By distinguishing these two types of roles, it is beneficial to reveal the role of key lines with different roles in the process of cascading failures, making key line identification more refined .
Description
technical field [0001] The invention belongs to the field of power system safety evaluation, and in particular relates to a key line identification method for two types of roles in a power transmission network based on symmetric entropy. Background technique [0002] With the continuous expansion of power demand, the power grid plays an increasingly important role in social production and life. Therefore, how to ensure the efficient, safe and stable operation of the power grid has become one of the key issues. Although the protection and control system can effectively improve the reliability of the safe operation of the power grid, there are still many "low-probability, high-risk" blackouts (cascading failures), which pose a serious threat to national security and economic development. From the perspective of the development process of these power outages, it is often due to the failure of a certain component that causes the successive failures of other components and finall...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06Y02P90/82
Inventor 刘渊韦晓广陶嘉刘虹彭燕谢源
Owner JIANGXI SCI & TECH NORMAL UNIV