基于扩展等面积准则理论的大容量机组投运对电网暂态稳定性的影响研究  

Research on Impact of Large⁃Capacity Unit Commissioning on Power Grid Transient Stability Based on EEAC Theory

作　　者：武海燕 刘石川 慕腾 郭琪 任斌 郭裕 达尔汗 WU Haiyan;LIU Shichuan;MU Teng;GUO Qi;REN Bin;GUO Yu;Daerhan(Inner Mongolia Power(Group)Co.,Ltd.,Inner Mongolia Power Research Institute Branch,Hohhot 010020,China;Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power System,Hohhot 010020,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,呼和浩特010020 [2]内蒙古自治区电力系统智能化电网仿真企业重点实验室,呼和浩特010020

出　　处：《内蒙古电力技术》2022年第3期46-52,共7页Inner Mongolia Electric Power

基　　金：内蒙古电力(集团)有限责任公司科技项目“基于PSD⁃FDS的蒙西高风光渗透率电力系统的安全稳定分析及措施验证研究”(2022-22)。

摘　　要：针对电网网架薄弱地区大容量机组的投运可能会造成系统暂态稳定水平降低,导致电网接带负荷能力下降的问题,结合某电网的实际情况,运用等面积准则和扩展等面积准则对该电网HY电厂新增机组后出现的暂态稳定问题进行计算分析,指出在电网规划和设计中应该充分考虑送端电源系统结构、机组出力大小以及该地区短路容量等因素,以避免因送端系统“大机大负荷小网”的结构特点而造成电网暂态稳定水平下降。通过仿真分析,提出可以通过扩建主变压器、控制机组出力、快速切除故障、改善发电机及其励磁调节系统特性、提高领前群机组机端电压和无功出力及切机等措施来提高地区电网的暂态稳定性和接带负荷能力。In view of the fact that the commissioning of large⁃capacity units in areas with weak grids may reduce the transient stability of the system and lead to a decrease in the load capacity of the power grid,this paper analyzes the phenomenon,combined with the actual situation of a certain power grid,the equal⁃area rule and the extended equal⁃area rule are applied in this paper.It is pointed out that in the planning and design of the power grid,factors such as the structure of the sending⁃end power system,the output of the unit,and the short⁃circuit capacity of the area should be fully considered,in order to avoid the drop in the transient stability of the power grid due to the structural characteristics of the large machine,large load and small network of the sending end system.Finally,through simulation analysis,it is proposed that the transient stability and splicing load capacity of the regional power grid can be improved by controlling the output of the unit,expanding the main transformer,quickly removing the fault,improving the characteristics of the generator and its excitation regulation system,increasing the terminal voltage and reactive power output of the leading group of units,and cutting the machine.

关 键 词：接带负荷能力 等面积准则 扩展等面积准则 暂态稳定性 电源系统 机组出力 

分 类 号：TM712[电气工程—电力系统及自动化]