摘要
给出注入功率空间中满足输电线路热稳定性约束的电力系统安全域的快速计算方法。该热稳定安全域综合考虑了输电线路电流的有功和无功分量。通过有功静态安全域的数学表达式来描述输电线路有功电流与节点有功注入功率之间的数学关系;对于输电线路的无功电流与节点无功注入功率之间的数学关系,则由"修正的关联矩阵"和基本回路矩阵描述。计算所需的全部状态变量均采用广域测量系统(wide area measurement system,WAMS)实测获得。以新英格兰39节点系统为例对该方法所确定的热稳定安全域进行校验,结果表明:由该方法所确定的热稳定安全域边界相比基于直流潮流模型的结果更精确;其计算量较采用交流潮流模型的逐点法更低。
A calculation approach for power system thermal security region in power injection space was presented. Both real and reactive power transmission currents are considered in this thermal region synthetically. The mathematic expression of steady-state security region of real power, which is based on DC power flow model, is used to describe the mathematic relation of the real transmission current and the bus real injection; and the amended associate matrix and basic circuit matrix are used to describe the relation of the reactive transmission current and the bus reactive power injection. All the state variables are acquired by wide area measurement system （WAMS）. The test results on the new England 39 buses system show that the power system thermal security region given by this paper approach can be more accurate than the result based on the approach of DC power flow model, and much lower computation burden than the approach of AC power flow model.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第10期33-38,共6页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973项目)(2004CB217904)~~
关键词
输电线路电流约束
直流潮流模型
有功静态安全域
热稳定安全域
广域测量系统
transmission current constraint
DC power flow model
steady-state security region of real power
thermal security region
wide area measurement system （WAMS）
