太原理工大学阳泉学院—毕业设计说明书
结 论
本设计是汇能煤业35KV变电站供电系统设计，主要完成了以下工作： （1）对汇能35KV变电站的负荷进行了统计，并做了负荷计算，计算所用的方法是需用系数法，此方法比较简单。根据计算结果进而对该站所需的主变压器进行了选择，该站原有的主变压器容量仍能满足负荷的要求，因此近期无需改变。 （2）做了短路电流的计算，分析了短路的类型，计算短路电流的目的以及发生短路对煤矿供电质量的影响，根据短路电流计算结果，对电气设备进行了选择。 （3）对变电站继电保护做了详细计算，并就变电站自动化系统做了浅显的介绍。 虽然在理论上对其进行了设计，但是否能符合实际情况还需进一步的验证。设计35KV变电站是比较复杂的，涉及到现场的每一件设备都需要严格的选择，有时候虽然在理论上符合，但在现场就不一定适合。因此本次毕业设计只是对工程设计的一个初步了解，培养一种工程设计的思维方法。只是对35KV变电站进行了雏形设计，对于煤矿供电系统中存在的各类难题没有涉及。要想对变电站有一个比较完善的设计，还需继续深造学习。
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太原理工大学阳泉学院—毕业设计说明书
主要参考文献
[1] 崔景岳等编.煤矿供电.北京: 煤炭工业出版社, 2007.5
[2] 同济大学电气工程系编.工厂供电.北京: 中国建筑工业出版社, 1988.7 [3] 李树伟编.矿山供电.北京: 中国矿业大学出版社, 2006.3
[4] 焦留成编.实用供配电技术手册[M].北京: 机械工业出版社, 2001.8 [5] 唐志平主编.供配电技术[M].北京:电子工业出版社,2005.1 [6] 崔景岳等编.煤矿供电.北京:煤炭工业出版社,1992.5
[7] 周志敏等主编.电气电子系统防雷接地实用技术.北京:电子工业出版社,2005.12
[8] 刘宝林主编.电气设备选择·施工安装·设计应用手册[M].北京:中国水利水 [9] Trent E M .Metal Cutting. 2nd Ed. London: BUTTERWORTHS, 1984..5 [10] Education, enterprise culture and the entrepreneurial self: a Foucauldian perspective M Peters - Journal of Educational Enquiry, 2001 - firgoa.usc.es
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太原理工大学阳泉学院—毕业设计说明书
致 谢
本设计在选题及研究过程中得到苏争正老师的悉心指导。苏老师多次询问研究进程，并为我指点迷津，帮助我开拓研究思路，精心点拨、热忱鼓励。苏老师一丝不苟的作风，严谨求实的态度，踏踏实实的精神，使我在今后的工作及学习中受益无穷。对苏老师的感激之情是无法用言语表达的。
汇能煤业机电部部长、高级工程师姚冲在论文的完成过程中，给予了无私的帮助和解答，在此，我要向姚部长深深的鞠上一躬。
在论文即将完成之际，我的心情无法平静，从开始进入课题到论文的顺利完成，有多少可敬的师长、同学、朋友给了我无言的帮助，在这里请接受我诚挚的谢意!最后我还要感谢培养我长大含辛茹苦的父母，谢谢你们!
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太原理工大学阳泉学院—毕业设计说明书
附录1：主要英文参考资料及译文
Study on power system fault, and endanger the safe operation of the abnormal conditions in order to explore the response of anti-accident measures automation. In the course of its development there have been major users of the relay contacts to protect the power system and its components (generators, transformers, transmission lines, etc.) to make it from damage, it said along the relay. Basic tasks are: when the power system failure or abnormal condition, in the shortest possible time and the smallest region, as compared with the failure of equipment will be removed from the system, or a signal from the duty to eliminate the root causes of abnormal conditions in order to reduce or to avoid equipment damage and power supply to the adjacent areas of influence.
The first relay device is a fuse. After the emergence of a role in the electromagnetic circuit breaker relay protection devices, relays and electronic-based static digital computer relay. With electronic technology, computer technology, the rapid development of communication technology, artificial intelligence technologies such as artificial neural networks, genetic algorithms, evolutionary scale, such as fuzzy logic have been in the field of research and application of relay protection.
Relay protection device must have the following four basic properties: ① sensitivity. Reflect the ability of fault, that is usually sensitive factor. ② reliability. In the action, the action does not resist. ③ fast. To the shortest time limit will be the elimination of failure or anomaly. ④ selective. The smallest possible interval in the removal of failure, to ensure maximum continued to trouble-free supply. Choice of relay protection programs, in addition to the above settings need to meet the four basic performance, we must also pay attention to its economy. Protection devices that take into account not only the investment and operation and maintenance costs, one must also consider the imperfect device occurs due to refusal or moving maloperation on the national economy and social life losses. With the growing capacity of the power system, the scope has become an increasingly widespread, only the components of the system will relay devices, far from being able to prevent the occurrence of the whole long-term large-scale power system blackout of serious accidents. So we must proceed from the overall power system to study the failure
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太原理工大学阳泉学院—毕业设计说明书
by the corresponding components of the action of relay protection devices removed, the system will show what kind of condition, the system will lose stability characteristics of what and how to resume its normal operation as soon as possible, and so on. The task of system protection is that when the normal operation of power system has been destroyed, as far as possible, limit its impact to a minimum, the load power outages can be minimized. In addition, the machine, furnace, electrical fault any part of the safety of both the impact of energy production, especially in large power systems unit and the interaction and coordination of power production safety is becoming an important issue. Therefore, the system of relay protection and automatic device configuration of the security program should consider the machines, stoves and other equipment, the capacity for change, machines, equipment design and manufacture of furnace should also be fully taken into account safe and economic operation of power system of the actual needs. Large generating units in order to secure not only a good relay, but also research and promotion of fault prediction.
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