摘要
直流输电系统落入受端交流电网的落点选择需要考虑交直流系统的相互作用,主要包括有效短路比、静态电压稳定指标和受端系统的有功功率损耗。文中提出一种兼顾稳定性与经济性的直流落点选择方法。基于数学上解决多目标决策问题的线性加权和法,首先设置各指标的门槛值,然后对其进行归一化处理,采用组合赋权法合理确定权系数,建立目标函数,选出最优落点作为换流母线。算例分析表明所述方法切实可行,兼顾了交直流系统的稳定性和经济性。
The main factors for planning DC links terminating at AC system locations from the point of interactions between AC and DC systems are illustrated, such as the effective short-circuit ratio （ESCR）, the voltage static indicator （VSI）, the power losses of the termination system, etc. A new method is proposed to select stable and economical AC buses as the locations of DC links. Based on the linear weighted summation method for multi-objective decision-making problems, the objective function is established to select the optimal placement of a commutation bus by setting the threshold values of all indices, normalizing them and using a combinatorial assigning method to rationally determine the weight coefficients. According to the objective and eecnomvconsidered atonee the methodfunctionvalueofeachnode_the, oDtimalonenre entedise fe tive andfeasible.WillsbeCh^senfaScthec^mmutati^n bus. Numerical tests show that, with stability
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第24期73-78,共6页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50807013)
中央高校基本科研业务费专项资金资助项目(10ZG02)
高等学校学科创新引智计划(“111”计划)(B08013)~~
关键词
交直流系统
直流落点选择
多目标决策
有效短路比
静态电压稳定指标
AC-DC system
DC links location
multi-objective decision
effective short-circuit ratio
static voltage stability index
