二次屏蔽

本文重点研究了传输线矩阵法（TLM）在电力系统二次设备屏蔽体的设计中的应用。

The transmission line matrix method ( TLM ) about the design of the shielding of the secondary equipments in power system is mainly researched in this paper .

就二次回路电缆屏蔽层两端接地以及牵引变电所回流回路与变电所接地网连接方式的设计、施工问题进行探讨并提出建议。

Discusses and puts forward the proposals on design and construction of earthing methods for both ends of cable screening layers of secondary circuit as well as the connection mode between return circuit and earthing network of traction substation .

一个根本性的解决方法就是开发一个通用的Web二次开发平台，屏蔽技术上的实现细节，形成一个标准的软件开发过程，使开发人员集中于业务的分析和实现。

A fundamental solution is to develop a general Web second development platform which shields the technical detail of implementation and causes a standard software process . With it , much attention will be paid to the analysis and implementation of Web business system .

聚苯胺由于具有低成本、结构多样化、通过掺杂电导率可调、重量轻等特点，在发光材料、传感器、太阳能电池、二次电池、电磁屏蔽、金属防腐等领域呈现广泛的应用前景。

Because of the low cost , flexible doping conducting , light in weights and diversification in structure , Polyaniline has widespread application in such regions as light emitter diode , sensor , solar cell , rechargeable battery , electromagnetic interference shielding , metal anticorrosion and so on .

导电聚合物及其复合材料在催化、锂离子二次电池、电磁屏蔽材料和化学传感等很多领域都具有很广泛的应用价值，研究发现导电聚合物可以化学还原比其还原电位高的金属离子。

Conducting polymers and their composites have significant application in catalysts , Li-ion battery , electromagnetic shielding materials , chemical sensors etc. It has been recognized that a metal ion having a higher reduction potential than that of a conducting polymer can be chemically reduced by the conducting polymer .

然后，结合二次电缆的结构和二次电缆屏蔽层的抗电磁干扰原理，建立电磁干扰原理的电路模型，并使用PSpice电路仿真软件进行仿真实验分析。

Secondly , based on the structure of the secondary cables and the theory of the electromagnetic anti-interference in shields , the circuit models ware built and simulated in PSpice .