By programming transition process of one - order inertial system , designing rationality in the whole process of the set value changing and introducing assistant application of the derivative signal , the implementation of control target was carried into the programmed process control and made the control key to transit from confirming system model to roughly estimating the time constant of system , and the control effect was improved evidently 通过一阶惯性规划过渡过程，设计设定值变化的全程合理性和引入微分信号的辅助应用，将控制目标的实现落实在规划的过程控制之中，使控制关键由原来对系统模型的确定过渡到对系统时间常数的粗略估计，显著地改进了控制效果。
By close study on the average temperature rise , temperature distribution , and tune constant of the class f resin dry type power transformer ' s high voltage and low voltage winding under self - cooling and wind - cooling mode , we find out the connection between the variation of the load and the items , mentioned above . the results of the experiments can be reference to both thermal design optimization of dry type power transformer and the revision of current standards . meanwhile , we develop the software , which can predict the overload ability of the dry type power transformer 本文对f级树脂浇注式干式变压器的高、低线圈的平均温升，内部温度分布和时间常数在自冷和风冷，两种冷却方式下随负载变化的规律进行了研究，得出了平均温升、热点温升和时间常数随负载变化的相互关系和有关计算用参数和公式，试验结果可作为改进干式电力变压器的热设计的依据和对现行标准进行修改的参考。
Abstract : the saturation behavior of stress current is studied . the three types of precursor sites for trap generation are also introduced by fitting method based on first order rate equation . a further investigation by statistics experiments shows that there are definite relationships among time constant of trap generation , the time - to - breakdown , and stress voltage . it also means that the time constant of trap generation can be used to predict oxide lifetime . this method is faster for tddb study compared with usual breakdown experiments 文摘:基于一阶速率方程,讨论了恒定电压应力下应力电流的饱和行为.通过对应力电流的拟合,发现存在三类缺陷产生的前身.更进一步的统计实验显示,在缺陷产生时间常数、击穿时间以及应力电压之间存在着明确的关系.这意味着缺陷产生时间常数能够被用于有效预测氧化层的寿命.与常规的氧化层击穿实验相比,基于缺陷产生时间常数的预测更快、更有效
On this basis , fortran program is written to solve temperature and velocity fields in transformer . by using this program we can calculate total flow , duct flow , mean temperature rise of transformer oil , oil time constant , mean oil temperature rise in each winding - coil , temperature distribution in each winding - coil , and stable / transient state temperature field . so this program has a great use value 在此基础上，我们编制了计算自然油导向冷却的具有饼式线圈变压器流场和温度场的fortran程序，程序可以对总油流量，进入各相、各油道的油流量，各线圈内的油流分布，变压器的油平均温升，油的时间常数，各线圈的平均线油温升，各线圈内的油温分布以及各线圈的稳态温度场、暂态温度场进行定量模拟，具有较强的实用价值。
It can acquire the voltage on the test appliance and current in the circuit . and it can see these electrical signals as its input and calculates based on the data and gives the parameters and waveform that user needed . the parameters we can get through calculation include power factor , joule ' s integral , available value , maximal value , minimum value , time constant etc . recently , there are many scholar is studying the algorithm that calculate the parameter using test data , but many of them adopt the heuristic method , not using the test data directly 本课题研制一套电器试验参数高速采集系统，能够检测试验回路中试品上的电压信号和回路中的电流信号，并根据这些电信号的数值利用计算机进行在线计算，并给出用户需要的各种电参数值和用户需要的波形图，通过计算得到的电器参数有功率因数、焦耳积分、有效值、最大最小值、时间常数等。
In the second place , based on the asu of buggenum igcc plant in netherlands , both static and dynamical model for distillation tower of the asu are created and some valuable conclusions are gained as well . finally , a compartmental simplified model is created for distillation tower of the asu , in order to reduce the simulation time and increase the simulation efficiency . the new model will be helpful to the further simulation and on - line optimal control for the asu of the igcc plant 其次，本文以荷兰buggenum电站的空分系统为原型，基于matlab建立了空分系统精馏塔的半图形化动、静态数学模型，并通过模拟，得出了一些有价值的结论：当空分系统的压力变化时，氧气产品浓度的响应时间常数为两小时左右，说明空分系统是igcc电站最大延迟环节；而且虽然氧气浓度最后会稳定在igcc电站所要求的范围之内，但在过渡过程中会超出限制，这些都为igcc电站的安全运行及控制系统设计提供了有价值的信息。
