220KV一次降压变电所继电保护电气部分初步设计毕业设计

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1、汉中一次降压变电所继电保护部分初步设计 I 摘 要 本次设计的主要内容是变电所的主变压器的选择、主接线的选择、短路计算、变电所保护装置等的选定进行设计，通过对变压器以及线路保护配置的选择来实现动作，从而更好地保证电力系统的安全运行。 其主要采用的保护有继电保护、过电压保护、瓦斯保护、变压器差动保护。在此期间，遇到的种种问题均通过反复比较、验算，并请教老师得以解决。毕业设计论文由设计说明书、设计计算书、一套图纸（电气主接线图、保护配置图、保护展开图）组成。内容较为详细，对今后扩建有一定的参考价值。 本次设计是我们在校期间进行的最后一个非常重要的综 合性实践教学环节，也是我们学生全面运用所学基础理

2、论、专业知识对实际问题进行设计（或研究）的综合性训练，同时还是我们将来走向工作岗位而奠定的基本实践。通过本次设计可以增强我们运用所学知识解释实际问题的能力和创新能力，以便更好地适应工作的需要。变电所的合理设计与建设是一个极其重要的组成部分。本次设计是根据毕业设计任务书的要求，综合所学专业知识及变电所设计等书籍的有关内容，在指导老师的帮助下，通过本人的精心设计论证完成的。整个设计过程中，全面细致的考虑工程设计的可靠性、经济性、灵活性等诸多因素，最终完成本设计 方案。 电力系统继电保护的设计与配置是否合理，直接影响电力系统的安全运行，故选择保护方式时，满足继电保护的基本要求。在上述原则基础上，明确

3、设计的目的，逐步完成主变的选择、电气主接线的拟定、短路电流的计算、整定计算、绘制图纸等主要工作，形成较为完整的论文。 选择保护方式和正确的计算，以保证电力系统的安全运行。 关键词 电力系统，继电保护，整定计算，灵敏度校验 沈阳工程学院毕 业设计（论文） II Abstract This important task of this design is protective relaying design of sabstation through the pootective distribution of the tramsformer and lines. Ensure the Elect

4、ric power systems safe operation. In complete this design process, we can study the electric power engineering the design, investigative procedure in problem in technique with method, be collected information, checked the cultural heritage, investigate the research, project comparison and design the

5、 various training in etc. Mainly uses the protection has the gas to protect, the transformer differential motion protection, the electric current, the load, the distance protection. For the sake of dependable that guarantee the power supply with a request that contented long-term burthen, carries ac

6、cording to the forward the programming proceeding design developments, from but guarantee to change to give or get an electric shock can long-term dependable power supply. This design is we in school period carries on last the count for much comprehensive practice teaching link, also is our student

7、comprehensively utilizes studies the basic theory, the specialized knowledge carry on the design to the actual problem (or research) the comprehensive training, simultaneously or we future will move towards the basic practice which the work post will establish. May strengthen us through this design

8、to utilize studies the knowledge explanation actual problem the ability and the innovation ability, in order to meets the work need well.This design is at guiding teacher descend, passing oneself of design what argument complete with meticulous care. Whole design process inside, completely dependabl

9、e, economic, vivid.etc. many factors that meticulous consideration engineering design, end complete this design project. The Electric power systems protective relaying design and distribution whether is rational directly affect safe operation whon selecting protective duty. Should satisfy basic requires of protectivc relaying selecting protective detty and right calculated setting ensures the electric power systems safe operation. Key Words electric power system, relay protection, setting(up) to compute, sensitivity calibration