电力变压器

It has been received and upheld by the people. It involves a great deal content that is extensive and intricate. It bestrides subject of three aspects. The first is IC control chip system of micro-electronics; The second is electronic devices of high-performance power semiconductor such as MOSFET and IGBT. The third is various devices of inductance and magnetic materials of transformer how to be utilized and rolled rationally.

现代高频开关稳压电源技术涉及的内容是极其广泛和复杂的，它横跨了三个学科：一是微电子精细加工的智能化专用集成电路控制芯片系统；二是正在快速更新的高性能功率半导体MOSFET和IGBT等电力电子器件；三是要合理利用，绕制各种电感器件和变压器所用的磁性材料等几大类。

It has been received and upheld by the people. It involves a great deal content that is extensive and intricate. It bestrides subject of three asp ects. The first is IC control chip system of micro-electronics; The second is electronic devices of high-performance power semiconductor such as MOSFET and IGBT. The third is various devices of inductance and magnetic materials of transformer how to be utilized and rolled rationally.

现代高频开关稳压电源技术涉及的内容是极其广泛和复杂的，它横跨了三个学科：一是微电子精细加工的智能化专用集成电路控制芯片系统；二是正在快速更新的高性能功率半导体MOSFET和IGBT等电力电子器件；三是要合理利用，绕制各种电感器件和变压器所用的磁性材料等几大类。

It deflates the influencing area of faults and reduces operation time delay of backup protection.In the end it is proved that the new scheme is correct by a mass of simulation using PSCAD/EMTDC, and the scheme is feasible and practicable.

最后用电力仿真软件PSCAD/EMTDC做了大量的仿真工作，证明了本文提出的原理适用于各种变压器的运行方式，而且简单可行，具有良好的实际应用价值。

Vacuum greasing and drying also may be used for transformer are various power equipment becoming damp.

也可用于变压器的真空注油和干燥各种受潮的电力设备。

As is known to all,because of the physical factor,the quality of electric component(such as transformer, generatrix,cable,power capacitor and motor),and the factor of maintenance. The fact of short circuit and abnormal running of the power supply system is inevitable.

众所周知，由于自然条件、电气元件（如变压器、母线、电缆、电力电容器、电动机等）制造质量、运行维护诸方面因素，供电系统发生短路故障或异常运行状态是不可能完全避免的。

Excess current of transformer tap changing winding is limited by controlling the switching of mutual repulsive thyristors at the instantaneous of current passing zero.

1引言有载调压变压器是电力系统最重要的调压设备，在系统运行中可以自动调节变比，维持负荷区域内的电压水平。

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DTS includes a series of component models of power system: generator, load, line, transformer and relay set.

DTS系统包括一系列的电力系统组成部件的模型，如发电机、负荷、线路、变压器、继电器等等。

For oil-filled transformers in power industry, dissolved gas analysis with gas chromatograph is applied as an efficient tool for their routine monitoring and fault diagnosis.

对于充油变压器，利用气相色谱法检测油中溶解气体进行内部故障判断的方法，已在电力行业中得到了广泛地应用。

The proposed method can work well under asymmetry element parmeters,and it is not necessary to consider the phase shift of ideal transformer or using multi-port net theory,which make the proposed method more applicable and simplify the calculat...

相分量算法不要求电力系统元件参数对称或循环对称、不利用多端口网络理论及理想变压器的移相，拓宽了故障计算的适用范围、简化了编程难度，并可推广到处理诸如线路换位不完全的参数不对称等其他电网不对称计算。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。