基于序列二次规划算法的多馈入直流输电系统功率优化

我国已形成含有多馈入直流输电系统(multi infeed direct current，MIDC)的大规模交直流混合电力系统，由于直流输电系统换流站的特殊性，直流输电系统有功功率的输送会影响受端交流系统的运行特性。以MIDC系统各条直流线路输送的功率为控制变量，受端系统网损为目标函数，采用序列二次规划(sequence quadratic programming，SQP)算法对MIDC系统输送功率进行优化。算例证明该方法可有效减小受端系统网损，优化后双馈入DC/AC的9节点系统网损平均降低0.72%，三馈入DC/AC的118节点系统网损平均降低0.97%。

Active Power Optimization of Multi-Infeed DC Power Transmission System by Use of Sequence Quadratic Programming

Large-scale AC/DC hybrid power system containing multi-infeed direct-current (MIDC) systems has been formed in China. Due to the particularity of converter stations, the active power transmission in MIDC may impact the operating characteristic of AC power system at the receiving end. Taking the active power transmitted in DC transmission lines of MIDC as control variables and the network loss of the power system at receiving end as the objective function, the active power transmitted in MIDC system is optimized by sequence quadratic programming (SQP). Results of calculation examples prove that the proposed method can effectively reduce the network loss in power system at receiving end. After the optimization, the network loss of IEEE 9-bus system with double-infeed DC system can be reduced by 0.72 percent and the network loss IEEE 118-bus system with triple-infeed DC system can be reduced by 0.97 percent.