The design of the topic "township of the power supply system " powered The design of the main contents include: 10/4 kV main transformer substation choice， Substation auto-switch design， Short-circuit current calculation， Load calculation， Reactive power compensation， Electrical equipment selection (bus， high voltage circuit breaker， isolating switch， lightning arrester)， Distribution device design， Relay protection， planning and design， Lightning protection design According to the main electrical design should meet the reliability and flexibility， economy， the design of main electrical wiring high side by a single bus wiring， low voltage side of the single section of busbar auto-switch form， The statistics of low voltage side load calculation using need coefficient method， In order to reduce the loss of reactive power， improving the utilization ratio， the design of transformer， transformer power lines; power Short-circuit current calculation include the choice and short-circuit point numerical calculation， And electrical equipment selection adopted according to the rated current selection， according to the standard short-circuit current calculation method; what mix) Relay protection design of transformer is mainly for the protection and electrical flow over current protection design calculation， This design detailed consumers 10kV overhead lines of common accident reason analysis and anti-accident 变压器选择；电气主接线；继电保护Transformers， The main electrical wiring， Relay protection
This paper first book according to the mission to system and routes and all load parameter， this paper analyses load development Consult the relevant information design first， collection and research a lot of material， and translate the related foreign material， then analyzed to load， precise calculation and analysis of load growth from the necessity of clarified， then through wipeout of substation of generalization and built to qualify to consider， and through the direction of load data analysis， safety， economy and reliability into consideration， determine the 35kV voltage level 110 kv and worked two approach compared with cable connections to determine the Lord in ways that do the Lord wiring system design， 110 kv side chose to expand inside bridge connection mode， the consumers 10KV single busbar subsection wiring way， then tong ?
This paper first book according to the mission to system and routes and all load parameter， this paper analyses load development Consult the relevant information design first， collection and research a lot of material， and translate the related foreign material， then analyzed to load， precise calculation and analysis of load growth from the necessity of clarified， then through wipeout of substation of generalization and built to qualify to consider， and through the direction of load data analysis， safety， economy and reliability into consideration， determine the 35kV voltage level 110 kv and worked two approach compared with cable connections to determine the Lord in ways that do the Lord wiring system design， 110 kv side chose to expand inside bridge connection mode， the consumers 10KV single busbar subsection wiring way， then through the load calculation and power supply range identified the main transformer sets， capacity and model， with three， determine the transformer capacity as the 50000KVA， SZ10-50000 / type， then the standard 110 to short-circuit calculation method of what value is analyzed and According to the maximum continuous working current and short circuit calculation results of calculation of isolating switch， bus， voltage transformer， current transformer and the On the main transformer in setting calculation and analysis of the lightning part， determine the calculation and analysis， the method， and lightning made corresponding principle Thus finished 110 kv substations electrical parts of the consumers 10KV/ 满意不?
A New Principle of Discrimination between Inrush Current and Internal Fault Current of Transformer Based on Self-Correction Function基于变压器自校正函数区分突入电流与区内故障电流的新原理前言：Abstract--When differential protective relays are applied to transformer protection， how to identify the magnetizing inrush current and short circuit current caused by internal fault is the key Here， regarding the inrush current and short circuit current as the random signal， the sampled data are analyzed by correlation function principle in the digital signal processing （DSP）and the self-correlation function of the sampled data is Through the similar comparison operation conducted by standard self-correlation function (SSCF) formed with sinusoidal current the short circuit current and the inrush current can be distinguished by the magnitude of similarity The results in Electrical Power Dynamic Laboratory (EPDL) verify the feasibility of the proposed 当我们将差动保护继电器应用于变压器保护时， 如何区分励磁突入电流与变压器内部故障引起的短路电流就成为了关键问题。 在此，我们若将突入电流和短路电流视为随机信号， 就可以应用数据信号处理（DSP）中的相关函数原理分析采样数据， 并且计算采样数据的自关联函数。 通过类似的比较运算， 我们就可以根据相似系数的大小， 区分正弦电流短路电流和突入电流。电力动态试验室的实验结果证实了该方法的有效性。 Index Terms--Transformer， Differential protective relay， SSCF， Correlation function， Inrush current， Short circuit current， Random signal， EPDL索引词： 变压器， 差动保护继电器，自校正标准函数， 相关函数， 突入电流， 短路电流， 随机信号， 电力动态实验室。 正文：large power transformers are a class of very expensive and vital components of electric power Accordingly， higher demands are imposed on the study of their protection techniques; this includes the requirements of dependability associated with no mal-operations， security associated with no false tripping， and operating speed associated with short fault clearing Protection of large power transformers is a very challenging problem in power system relaying [1]大型电力变压器是电力系统中一类相当昂贵和重要的部件。 人们大型电力变压器保护技术的研究， 也也提出了较高的要求； 这些要求包括： 与无不正确操作相关的可靠性， 与误启动相关的安全性， 以及与短故障消除时间相关的运行速度。 对大型电力变压器的保护工作是电力系统继电保护中非常具有挑战性的问题[1]。 PS： 虽然它对我来说很难， 而我也不见得翻译得很好， 但是它还算不上史上最难吧！ 楼主做了回标题党。 玩笑归玩笑， 我的中文欠佳， 请楼主站在一个电力人的角度——平时你应该可以接触较多的专业中文论文——对我的译文评判评判。 :-)
