丹东电网黑启动安全分析

发布时间：2018-01-16 06:14

本文关键词：丹东电网黑启动安全分析　出处：《沈阳工程学院》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,电力系统不断引入的新技术与设备提高了电力系统的稳定性,但也给电力系统增加了很多不稳定因素,同时自然灾害和人为因素引起的电力系统大停电事故频发,造成了巨大的经济和社会损失,在增强系统稳定的同时研究电力系统大停电事故后的恢复问题是必要的。一旦发生紧急停电事故,必须果断采取措施恢复正常供电,否则延误了恢复过程可能会导致事故范围扩大,造成更加严重的损失。电力系统黑启动是指电力系统因故障停电后再启动的恢复供电过程,制定安全的黑启动方案是保证大停电后系统快速恢复的有效手段。本文结合丹东地区电网的实际情况,选择了适合本地区的黑启动电源和黑启动路径,对丹东电网黑启动过程中发电机自励磁、空充输电线路过电压、厂用辅机负荷投运对恢复小系统电压和电流的冲击等关键问题进行了理论上的分析和仿真研究。文章以电磁暂态软件PSCAD/EMTDC为工具,对丹东电网黑启动方案进行自励磁安全分析,对三种空充输电线路方式及两种辅机启动方式分别进行过电压和辅机启动安全分析,验证丹东电网黑启动方案的可行性,比较各类充电、启动方式的优劣性。本文对电网黑启动方案的制定和安全分析有重要意义,对电力系统安全防御综合体系和国家应急管理体系有重要参考价值。
[Abstract]:In recent years, the new technology and equipment introduced into the power system have improved the stability of the power system, but also added a lot of unstable factors to the power system. At the same time natural disasters and human factors caused by power system blackouts frequent, resulting in huge economic and social losses. It is necessary to study the recovery of power system after blackout while enhancing the stability of the system. Once an emergency power failure occurs, measures must be taken to restore the normal power supply. Otherwise, delayed recovery process may lead to the expansion of the scope of the accident, resulting in more serious losses. Establishing a safe black start scheme is an effective means to ensure the rapid recovery of the system after the blackout. This paper selects the black start power supply and the black start path suitable for the region according to the actual situation of Dandong power grid. For the Dandong power grid during the process of black start the generator self-excitation and overvoltage of air-filled transmission line. The paper makes theoretical analysis and simulation study on the key problems such as recovering small system voltage and current impact by load operation of auxiliary machine. The electromagnetic transient software PSCAD/EMTDC is used as a tool in this paper. The self-excitation safety analysis is carried out on the black start scheme of Dandong power grid, and the overvoltage and the safety analysis of the auxiliary machine start-up are carried out respectively for the three kinds of empty charging transmission lines and the two auxiliary machine start-up modes. Verify the feasibility of Dandong power grid black start scheme, compare the advantages and disadvantages of various charging and startup methods. This paper is of great significance for the establishment and safety analysis of power grid black start scheme. It has important reference value for the comprehensive system of power system security and defense and the national emergency management system.
【学位授予单位】：沈阳工程学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM73

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