Question

急需电力专业毕业设计中文摘要的英文翻译哈，请各位大侠帮我翻译下哈，不胜感谢！

电力网络是电力系统中除发电设备和用电设备以外的部分。电力网络包括变电、输电、配电3个环节。主要由电力线路、变电所和换流站(实现交流电和直流电相互变换的技术装置)组成。按功能可分为输电线路、区域电网、联络线和配电网络。电力网络把分布在广阔地域内的发电厂和用电户连成一体，把集中生产的电能送到分散用电的千家万户。电力网络的运行工况是否安全、合理，直接影响国家的经济发展。因此，对电力网络的整定计算进行研究，具有非常重要的实际意义。
随着电力网络规模不断扩大，电力系统继电保护装置的数量不断增加，质量不断提高，继电保护管理工作的复杂程度和技术难度也不断增加。其核心就是电力网络的继电保护整定计算。本文以短路故障经典算例来介绍电力网络故障电流的计算方法，并对系统短路电流整定计算的进一步完善和发展进行了简单探讨。
在电力系统投入运行前和实际运行参数改变时，都需要通过短路计算，求解流经某些电气设备的短路电流，对继电保护整定值及设备的关键参数进行校验，以确保电力设备安全运行。正确掌握电力系统短路电流计算的基本原理和方法，是能否正确设置电气设备继电保护整定值和相关参数的关键。通过计算得知设备所经受的冲击电流和需要的开断容量，给选择设备提供技术依据。与此同时，还可以通过计算得知电气设备在各种故障状态下的故障电流，从而给保护装置进行定值整定。这些工作在电力系统日常工作中的作用显得尤其重要和有意义。
本文首先详细介绍了短路电流的计算方法和过程，然后结合电力网络的特点，通过分析一个简单系统对电力网络继电保护整定计算问题进行研究，分析得出不同结论的原因以及不同计算方法所适用的范围。
关键词：电力网络；整定计算；短路电流计算；继电保护；短路冲击电流；
谷歌翻译的不太准确哦

Answer 1

　　Power network is the power system of power generation equipment and electric equipment in the outside. Power network transmission and distribution, including three links. Mainly by power lines, substation and ac and dc converter (realize mutual transformation technology device). According to the function can be divided into the transmission lines, regional grid, tie and distribution network. Power network distribution in vast territory of plants and YongDianHu becomes an organic whole repeatedly, the production of electric power to scatter. Power network operation condition is safe, reasonable, directly affects the development of national economy. Therefore, the setting of power network computing research, has very important practical significance.
　　As the electric power network scale unceasingly expands, the power system protection device of increasing of quantity and quality enhances unceasingly, relay protection management of complexity and difficulty of technology are also increasing. Its core is the power network of relay protection setting calculation. Based on the classic example to short-circuit fault fault current electricity network is introduced, and the calculation method of short-circuit current calculation system setting the further improvement and development are discussed.
　　In power system and the actual operation before the operation parameters change, all need through short circuit calculation, solving some electrical equipment through the short-circuit current, relay protection setting value and the key parameter calibration equipment, electric equipment to ensure safe operation. Power system correctly grasp the basic principle of short-circuit current calculation method is correct and relay protection setting electrical equipment and related parameters of the value of the key. Through the calculation of the electric equipment and experienced impact to open to choose equipment capacity and provide technical basis. Meanwhile, through calculation of electrical equipment in various fault condition, giving the fault current protection device fixed value setting. These work in power system in the daily work appear particularly important and meaningful.
　　This paper introduced the short-circuit current calculation method and process, then combines power network, through the analysis of the characteristics of a simple system of power networks relay protection setting calculation, this article analyzes the problems and the causes of different conclusion of different calculation methods applicable scope.
　　Keywords: power network, The setting, Short-circuit current calculation, Relay protection, Short-circuit current,

　　我请我老师翻译的 呵呵

Answer 2

Electric power system network, in addition to other power generation equipment and electrical equipment parts. Electricity network, including substation, transmission, distribution three links. Mainly by power lines, substations and converter stations (to achieve the transformation between AC and DC technology device) form. According to the functions can be divided into transmission lines, regional power grid, contact lines and distribution networks. Electricity distribution network to the vast geographical region as close plants and electricity users, to focus on the production of electricity delivered to every household electricity distributed. Power network operating conditions are safe, reasonable, and directly affect the country's economic development. Therefore, power networks, setting calculation study has very important practical significance.
With the power network have been expanding the number of power system protection devices increasing continuously improve quality, protection management work of the complexity and technical difficulty also increases. The core is the power network relay protection setting calculation. In this paper, short-circuit fault to present the classic example of the power network fault current calculation method, and setting short-circuit current calculation system further perfection and development is discussed briefly.
Put into operation in power system operation before and the actual changes in the parameters are calculated through a short circuit, passing through some of the electrical equipment to solve short-circuit current, relay protection setting values on the key parameters and equipment check to ensure the safety of electrical equipment run. Correctly grasp the power system short-circuit current calculation of the basic principles and methods, is able to correctly set the value of electrical equipment and relay protection setting the key parameters. By calculating the impact of that equipment withstand current and breaking capacity required to provide technical basis for the selection of equipment. At the same time, can also be calculated in a variety of electrical equipment that under fault conditions the fault current, and thus to the protection of value tuning device. These work in the daily work of the power system is especially important and meaningful.
This paper details the short-circuit current calculation method and process, and then combine the characteristics of electricity networks, by analyzing a simple system of power network relay setting calculation to undertake a study to analyze the reasons come to different conclusions and different methods for calculating range.
Key words: power network; calculation; short-circuit current calculation; protection; short circuit surge current;

Answer 3

Power network is the power system of power generation equipment and electric equipment in the outside.

Answer 4

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