交直流混合配电网粗糙状态估计研究

项目名称： 交直流混合配电网粗糙状态估计研究

项目编号： No.51277052

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 电工技术

项目作者： 卫志农

作者单位： 河海大学

项目金额： 76万元

中文摘要： 随着分布式电源、柔性直流输电等新兴元素的涌现，交直流混合配电网逐步成为未来配电网的主流运行方式。同时，配电网状态估计是配电管理系统的重要组成部分，对保证配电网安全、经济运行起着至关重要的作用。本课题旨在研究交直流混合配电网粗糙状态估计。首先，针对交直流混合配电网量测信息的特点以及自身拓扑结构的变化，提出基于粗糙集理论的伪量测分析方法和交直流混合配电网静态粗糙状态估计模型，并从三相不对称解耦、交直流解耦等方面进行算法研究。然后，结合抗差估计器的优良特性，建立基于粗糙集理论的交直流混合配电网抗差状态估计模型，进一步提高状态估计的精度和处理粗差的能力。最后，在此基础上建立基于UKF的交直流混合配电网动态粗糙状态估计模型，提高算法的鲁棒性、计算精度、收敛性。本课题的研究成果对促进交直流混合配电网的发展有重要的理论和实际意义，同时也能有效地实现交直流混合配电网状态估计的广泛应用。

中文关键词： 配电网；交直流混联；状态估计；粗糙集；解耦

英文摘要： With the emergence of distributed generation, VSC-HVDC, etc., AC/DC distribution network gradually becomes the main operating mode of the future distribution network. Forthermore, distribution network state estimation is an important part of distribution management system, which plays an important role in guaranteeing power system to operate safely and economically. This project focuses on rough state estimation of AC/DC distribution network. First of all, the properties of measuring information in AC/DC distribution network, its own changes of topology, etc., are taken into account, based on the rough set theory, the analytic method of pseudo measurement and the model of AC/DC distribution network static rough state estimation are proposed, respectively, then we will analyze the algorithm about decoupling the asymmetry of three-phase and AC/DC. Then, combining the excellent properties of robust estimator, the model of AC/DC distribution network robust state estimation based on rough set theory is thus established, which can improve the precision of state estimation and the ability of processing gross error. Finally, the model of AC/DC distribution network dynamic rough state estimation based on UKF is proposed, then some improvements about robustness, precision and convergence of the algorithm can be developed.

英文关键词： Distribution networks；AC-DC hybrid；State estimation；Rough set theory；decoupling