中国电机工程学报2016，Vol.36Issue(22)：6122-6130,9.DOI:10.13334/j.0258-8013.pcsee.160426
直流接入后的多态频率稳定性及机组控制策略
Multi-state Frequency Stability and Power Unit Control Strategy After DC Access
摘要
Abstract
Frequency analysis is the approximate analysis about source - load power balance, so the regional power grid frequency model with equivalent unit is reasonable. By three performance indicators, namely the disturbance moment rate, damping ratio and static deviation, the paper analyzed transient, dynamic and static stability of regional frequency after the direct current (DC) access, obtained the dominant factor. Analysis found that after constant power DC access, equivalent machine inertia and power frequency static characteristic coefficients were smaller; the former leads to deteriorates of transient stability, the latter leads to deterioration of static stability, both the ratio basically unchanged result dynamic stability basically unchanged; if the change in power frequency static coefficient, the dynamic stability, static stability appears inverse characteristics. In addition, after the virtual inertia and droop regulated DC access, although the frequency stability by the end can be improved, but for the sending end disadvantage. Accordingly, it also suggests that the end of the conventional unit power-frequency adjustment method improvement strategies, namely series connection inertial element, in power feedback path, in the next frequency feedback channel parallel proportion-differentiation (PD) link. Theory and simulation show the effectiveness. The study provides useful references to improve frequency stability of regional power grid.关键词
直流接入/暂-动-静态频率稳定性/主导因子/动-静态逆特性/功-频调节的改进策略Key words
direct current (DC) access/transient- dynamic- static frequency stability/dominant factor/dynamic- static inverse characteristic/improved strategy of power-frequency adjustment分类
信息技术与安全科学引用本文复制引用
竺炜,钟鹏,巫晓云..直流接入后的多态频率稳定性及机组控制策略[J].中国电机工程学报,2016,36(22):6122-6130,9.基金项目
湖南省自然科学基金项目(2016JJ4001)；湖南省教育厅重点项目(16A006)。Project Supported by the Natural Science Foundation of Hunan Province (2016JJ4001) （2016JJ4001）
The Research Foundation of Education Bureau of Hunan Province (16A006) （16A006）
