Electrical Engineering and its Automation Graduation Design (Graduation Thesis of Northeast Li Dian University) Thursday, March 9, 2009 16:22 The main contents of the thesis include 1. Abstract 2. English translation. Raw data 4. Calculation book 5. Instruction 6. Reference 7. Directory of Primary or Secondary Design Sketch of Regional Power Grid System: Chapter 1. Fundamentals of design chapter 2. Original data Chapter III Design of Access System Chapter IV Design of Local Power Supply System Chapter V Selection of Main Transformer (including tap selection or regulation mode design) Chapter VI Design of Main Wiring (including power supply design) Chapter VII Calculation of Short-circuit Current Chapter VIII Selection of Equipment Chapter IX Configuration of Relay Protection [Text]: Chapter I. Graduation Design of Electrical Engineering and Automation Specialty in XX University Chapter II Design Basis. In order to meet the needs of industrial and agricultural production development, the original data was approved by the superior and decided to build a new Yanbei substation. 1. Design data (1) See Table 3 for the load data, lines and synchronization rate of each voltage level of the new Yanbei substation. The annual load growth rate of Yanbei substation is 5%, so five-year development plan should be considered. The total load of the substation is s 110 = k1(S35+s10) (1+5%) (2) There are two power receiving schemes for the new Yanbei substation: (1). (2) The power receiving distance is changed from 1 10KV to 35KM in the south (this project does not; See figure 1 (3) for the wiring diagram of power system, and see tables 1, 2, 3, 4 and 5 for the technical parameters of main equipment such as factories, substations and transmission lines. (4) Other original data: Address: flat terrain, soil field resistivity 1.5× 10ω? Cm, the site is higher than the highest flood level once in a hundred years. Climate of the address, average temperature 15℃, maximum temperature 35℃ and minimum temperature-15℃. Transportation: Close to the national second-class highway, 0.4 km into the expressway. Water source: there is a river near the substation, which is convenient for suppliers and has sufficient water source. 2. Design content (1) Access system design: determine the number of transmission lines and conductor sections of the access system. (2) Design of regional power supply system: According to the nature of regional load and power supply distance, determine the number of power supply lines and conductor section. (3) Determine the number, capacity, model and specification of main transformer in substation through technical and economic comparison. (4) Through voltage calculation, choose the main transformer tap or voltage regulation mode. (5) According to the determined main transformer scheme and the number of incoming and outgoing lines, the main wiring of the proposed substation is determined through technical analysis and demonstration. (6) Determine the power scheme of the substation to be built (the number, model, capacity and self-use power connection type of transformers used, and the power load used shall be calculated according to the substation capacity of 0. 1%). (7) Selection of electrical equipment 1. Select electrical equipment and relay protection setting, and calculate three-phase short-circuit current. 2. Select the primary electrical equipment of the substation (circuit breaker, disconnector, PT, ct, bus, lightning arrester and neutral grounding equipment). (VIII) Relay protection According to the requirements of relay protection, determine the relay protection configuration of each element in the substation. [Abstract]: This design specification is based on the requirements of graduation design task book, combined with electrical equipment, power system transient analysis, electrical steady-state analysis, mechanical system, relay protection, electrical engineering professional graduation design guide and other related books, which is the summary of my three-year study in university. Over the past three years, under the guidance of my teacher, I have learned a lot of knowledge, which has greatly promoted my study career and social practice life. Let me constantly challenge myself and enrich myself, not only with great ideological gains, but also with qualitative breakthroughs in knowledge. At the same time, it also pays attention to the application of the learned knowledge in practical work, which enhances the ability to deal with and analyze problems. The newly-built 1 10KV substation designed this time is based on the principle of providing sufficient power for all sectors of the national economy, meeting the power demand of users to the maximum extent, ensuring the reliability of power supply, ensuring good power quality and improving the operation economy of power system. Aiming at the design of access system: determine the number of loops and conductor section of transmission line in access system. Design of regional power supply system: according to the nature of regional load and power supply distance, determine the number of power supply lines and conductor section. Through technical and economic comparison, the number, capacity, model and specification of main transformer in substation are determined. Through voltage calculation, the main transformer tap or voltage regulation mode is selected. According to the determined main transformer scheme and the number of incoming and outgoing lines, the main wiring of the proposed substation is determined through technical analysis and demonstration. Determine the power scheme of the substation to be built (the number, model, capacity and self-use power connection type of transformers used, and the power load used is calculated according to 0. 1% substation capacity). Selection of electrical equipment: select electrical equipment and relay protection setting, and calculate three-phase short-circuit current. Select the primary electrical equipment of the substation (circuit breaker, disconnector, PT, ct, bus, lightning arrester and neutral grounding equipment). Relay protection according to the requirements of relay protection, determine the relay protection configuration of each element in substation. This design description is the basis of graduation design homework, which is a summary of my three years in college, combined with Electrical Equipment, Steady State Analysis of Power System, Relay Protection and Graduation Design Guide for Electrical Engineering. Over the past three years, relying on the guidance of teachers, I have gained a lot of knowledge, promoted my study, work and life, constantly challenged me and enriched me, and not only have I gained knowledge myself. Pay attention to it at work. The purpose of this design of 1 10KV substation is to provide sufficient power for various departments of the country, ensure power supply, ensure power supply quality and promote the economy of power system. Design of this operation system (determine the transmission line loop and line segment of the operation system); Determine the number, capacity, model and specification of the main transformer of the substation; Calculation of voltage, selection of tap position, economic and technical comparison; Determine the power supply scheme of substation; Calculating three short-circuit currents; Select electrical equipment (circuit breaker, disconnector, PT, CT, bus, lightning arrester, grounding device) and relay protection device to determine the relay protection configuration of substation. [Reference]: 1. Water voltage 2. Power system design equipment reference 3. Steady-state analysis of power system. Power system transient analysis hydropower press 5. Power Engineering Design Manual Hydropower Northwest Electric Power Design Institute 6. Power plant electrical part hydropower press 7. Power system relay protection