摘要
对于牵引供电系统车-地配合参数优化问题,建立了包含中压能馈装置的牵引供电系统等效电路模型,推导了采用电压下垂控制方式的直流潮流计算方法,并考虑了中压能馈装置的容量配制对潮流算法的影响.考虑直流电压对再生制动的约束,以列车再生制动能力最大发挥和系统能耗最小为目标,提出基于遗传算法的牵引供电系统车-地配合参数优化方法,得到最优逆变启动电压阈值和下垂控制斜率.最后以实际线路为例进行了仿真研究,结果表明:中压能馈装置开通牵引供电功能后系统节能效果更好,优化后系统能耗降低2%以上,达到了良好的节能效果.
To optimize the train-ground coordination parameter of traction power supply system,the equivalent circuit model of traction power supply system with medium-voltage energy feedback device is established,and the DC power flow calculation method with voltage droop control mode is deduced,when the influence of capacity configuration of the medium-voltage energy feedback device on the power flow algorithm is taken into consideration.Because of the constraints of DC voltage on regenerative braking,aiming at maximizing the regenerative braking capacity of the train and minimizing the system energy consumption,a train-ground coordination parameter optimization method for traction power supply system based on genetic algorithm is proposed to obtain the optimal value of inverter starting threshold voltage and droop slope.Finally,a simulation study is carried out with an actual line as example.The results show that system energy saving effect is better when the medium-voltage energy feedback device operate with traction power supply,the system energy consumption can be reduced by more than 2%after optimization,achieving good energy saving effect.
引文
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