基于网络化Euler-Lagrange系统的电力系统暂态稳定控制方法研究

项目名称： 基于网络化Euler-Lagrange系统的电力系统暂态稳定控制方法研究

项目编号： No.61503197

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 自动化技术、计算机技术

项目作者： 吴英俊

作者单位： 南京邮电大学

项目金额： 20万元

中文摘要： 保障电力系统稳定运行是关乎社会稳定和经济发展的重大问题。传统暂态稳定控制大都采用集中式方式。随着电力系统规模扩大和运行环境复杂化，集中式控制已经不能完全适应电力系统运行的需要，甚至是不可行的。提高电力系统的暂态稳定性实质上是要控制发电机趋向相同的转子角速度和稳态运行点的功角，是一个二阶系统一致性问题。据此建立了适合于研究多机电力系统暂态稳定控制问题的网络化Euler-Lagrange系统模型。暂态失稳大多表现为机群与机群之间失去同步，根据该机理并综合考虑通信成本，提出了较实用的二层邻居信息的一致性算法，其中第一层邻居和第二层邻居通过发电机机群同调识别和分群后选取得到。控制算法参数大小和通信网络拓扑等对一致性算法的性能有重大影响。基于Lyapunov稳定性定理等，研究了他们对一致性算法的收敛性和收敛速度的影响，并提出算法参数和通信拓扑的优化方法。

中文关键词： 暂态稳定；网络化Euler-Lagrange；系统；多智能体系统；分布式控制

英文摘要： It is critical to secure power system’ operation for social stability and economic prosperity. Conventionally, centralized control is employed to enhance power systems’ transient stability. However, with scale expanding and operation environment complicating, centralized control has not already adapted to the need of power system’s stability, even is infeasible. Actually, enhancing power systems’ transient stability is to force all generators’ power angles to theirs steady-state’s vales and rotor angular speeds to the rated speed, which indeed is a second-order consensus problem. A model for enhancing power systems’ transient stability based on Networked Euler-Lagrange Systems is established. Transient instability is caused by the asynchrony between generator clusters. Based on the instability mechanism and considering communication cost for control, a practical and effective consensus algorithm based on second-order neighbors' information is proposed, in which the first-order neighbors and second-order neighbors are decided by coherence generators identification and clustering. Parameters and communication network topology vary have significant influence on the performance of consensus algorithm. Through Lyapunov stability theory, the effects of parameters vary and communication network topology vary on the convergence performance and convergence rate are investigated. According to the investigation, the optimization of parameters and communication network topology is studied.

英文关键词： Transient stability;Networked Euler-Lagrange Systems;Multi-Agent Systems;Distributed Control