For instance, instantaneous current, instantaneous voltage descent and effective current, main changing capacity and so on, in addition, there are the minimum power shortage model, the optimal transformer substation location, the least engineering expenditure, the optimal mathematical model of traction power supply system. Optimize design’s algorithm of traction power supply system is introduced in detail in chapter four, where programming idea and realizing method of the computer software aregiven an explanation.
本研究主要进行了以下工作：结合牵引供电系统运行图的仿真原理和现行工程设计的实际情况，建立了牵引网电流分布、积分分布、任一时刻机车分布和取流的数学模型；应用数学规划方法建立了任一距离区间、任一时刻的瞬时电流、瞬时电压降数学模型和有效电流、主变容量和主变压降、最小功率损失、最佳变电所容量、最佳变电所位置、最少工程费用、最少运营维护费用和牵引供电系统方案最优等方面的数学模型；阐明了牵引供电系统优化设计的算法和计算机软件编程思想及实现方法；进行了工程实例计算；最后，对牵引供电系统优化设计技术应用进行了总结。
参考来源 - 牵引供电系统优化设计技术的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The total harmonic distortion (THD) can be reduced by the instantaneous voltage feedback control.
采用电压瞬时值反馈降低了输出电压波形的总谐波量。
The instantaneous voltage PID control inverter has advantage on circuit and cost, compared with voltage current dual-loop control inverter.
逆变器瞬时电压PID控制与电压电流双环控制相比，在电路结构、成本等方面更具优越性。
Adopting sinusoidal instantaneous voltage and current, a new algorithm for measuring sinusoidal electrical parameters has been put forward.
提出了一种利用正弦交流电压和电流的瞬时值测量正弦交流电参量的新算法。
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