兼顾稳定性与经济性的交直流系统直流落点选择方法

直流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...

A Method of Selecting DC Links Termination at AC Locations Considering Stability and Economy at Once

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 function value of each node,the optimal one will be chosen as the commutation bus.Numerical tests show that,with stability and economy considered at once,the method presented is effective and feasible.