基于机电扰动传播的大规模电网中频率动态时空分布机理研究

项目名称： 基于机电扰动传播的大规模电网中频率动态时空分布机理研究

项目编号： No.51477143

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 王德林

作者单位： 西南交通大学

项目金额： 81万元

中文摘要： 大区域电网互联运行后，机电扰动传播现象和频率动态时空分布成为互联电网动态演变的显著特征，使得电网的安全稳定运行更加困难，至今还无法从理论上进行准确分析和解释。因此，亟待对大规模电网中机电耦合扰动传播和频率动态特性展开研究。项目针对大规模电网中机电耦合扰动传播特性、扰动控制原理和频率动态分布机制等科学问题，考虑电网空间信息，运用连续体建模研究网架结构和运行参数对扰动传播特性的作用机理；提出根据离散模型中阻抗匹配法则通过储能元件抑制扰动传播的基本原理，给出控制器的设计方案和协调运行策略；运用色散现象诠释机电扰动在电网中的消纳机理和能量大范围传播的物理本质；探索频率动态时空分布的形成机理及其影响规律，完善频率动态分析理论，为大规模互联电网的安全运行和稳定控制提供理论依据。本项目是对复杂电网本身的研究和探索，关注机理和物理现象本质的揭示，对我国电网的全国联网战略实施具有重要的理论意义和实用价值。

中文关键词： 电力系统建模；电力系统仿真；电力系统稳定；协调控制；低频振荡

英文摘要： After the interconnected operation of large-area power grids, electromechanical disturbance propagation phenomenon and frequency dynamic temporal- and spatial- distributions become prominent characteristics of dynamic evolution in interconnected power grids, which make the safe and steady operation of grids much more difficult. Moreover, they haven't been analyzed and explained accurately in theory up to now. Hence, it is urgent to carry out the research on coupled electromechanical disturbance propagation and frequency dynamic characteristics in large-scale power grids. This project works mainly aiming at several scientific issues, i.e., propagation characteristics of coupled electromechanical disturbance, principle of disturbance control, frequency dynamic distribution mechanism in large-scale power grids. 1) Considering spatial information of grids, the action-mechanisms of grid structural- and operational-parameters influencing disturbance propagation characteristics are studied by using continuum modeling. 2)Next, presented is the principle of suppressing disturbance propagation by energy storage according to the law of impedance matching in a discrete model. Furthermore, the design schemes and coordinated strategies will be proposed. This project also: 3)expatiates the absorption mechanism of electromechanical disturbance energy and physical essence of energy propagation in a large scope by dispersion phenomenon; 4)and explores in-depth the formation mechanism and influence law of frequency dynamic temporal- and spatial-distribution in power grids, perfects the theory for frequency dynamic analysis, and provides a theoretical basis for the safety operation and stability control of large-scale interconnected power grids. Finally, what must be emphasized more, this project is the further research and exploration aiming at the complicated power grid itself, and focuses on the reveal of intrinsic mechanism and physical phenomena. It has important theoretical significance and practical value to the strategic implementation for national interconnection of power grids in China.

英文关键词： power system modeling;power system simulation;power system stability;coordinated control;low frequency oscillation