大型水电站雷电过电压与绝缘配合研究
发布时间：2018-07-15 15:37
【摘要】：鉴于目前大型水电站超高压输变电系统雷电过电压防护设计方法单一、手段落后,因此不断丰富设计手段,提高设计水平显得尤为重要。通过对国内外雷电过电压领域研究现状的分析比较,选择将ATP-EMTP仿真计算程序引入到项目设计过程中,以某大型水电站为研究对象,根据电站的实际情况建立电站输变电系统仿真计算模型,通过仿真计算,对其雷电过电压与绝缘配合进行了分析研究,重点研究了不同条件下电站内主变压器和电抗器雷电侵入过电压峰值的变化规律,并根据研究成果对主变压器和电抗器避雷器保护距离的确定进行复核并提出优化建议。通过引入ATP-EMTP仿真计算程序,对电站输变电系统初步设计方案进行建模和计算,通过对计算结果的分析比较,可以复核电站内的主要电气设备是否受到有效的保护,对暴露出来的问题进行分析并提出解决方案,还可以指导电站内电气设备布置方式的优化。在水电站设计领域引入计算机仿真计算手段,使水电站电气设计又向科学化、精细化方向迈出了坚实的一步。
[Abstract]:In view of the fact that the design method of lightning overvoltage protection is single and backward, it is very important to enrich the design means and improve the design level. Based on the analysis and comparison of the research status in the field of lightning overvoltage at home and abroad, the ATP-EMTP simulation program is selected to be introduced into the project design process, and a large hydropower station is taken as the research object. According to the actual situation of the power station, the simulation calculation model of the transmission and transformation system of the power station is established. Through the simulation calculation, the coordination between the lightning overvoltage and the insulation is analyzed and studied. The variation law of the peak value of lightning intrusive overvoltage of main transformer and reactor in power station under different conditions is studied emphatically. According to the research results, the determination of protection distance of main transformer and arrester is checked and the optimization suggestions are put forward. Through the introduction of ATP-EMTP simulation calculation program, the preliminary design scheme of transmission and transformation system of power station is modeled and calculated. Through the analysis and comparison of the calculation results, it can be found that the main electrical equipment in the nuclear power station can be effectively protected. The problems exposed are analyzed and the solutions are put forward, which can also guide the optimization of the layout of electrical equipment in the power station. The introduction of computer simulation in the field of hydropower station design makes the electric design of hydropower station more scientific and more refined.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV734;TM862
本文编号：2124559
[Abstract]:In view of the fact that the design method of lightning overvoltage protection is single and backward, it is very important to enrich the design means and improve the design level. Based on the analysis and comparison of the research status in the field of lightning overvoltage at home and abroad, the ATP-EMTP simulation program is selected to be introduced into the project design process, and a large hydropower station is taken as the research object. According to the actual situation of the power station, the simulation calculation model of the transmission and transformation system of the power station is established. Through the simulation calculation, the coordination between the lightning overvoltage and the insulation is analyzed and studied. The variation law of the peak value of lightning intrusive overvoltage of main transformer and reactor in power station under different conditions is studied emphatically. According to the research results, the determination of protection distance of main transformer and arrester is checked and the optimization suggestions are put forward. Through the introduction of ATP-EMTP simulation calculation program, the preliminary design scheme of transmission and transformation system of power station is modeled and calculated. Through the analysis and comparison of the calculation results, it can be found that the main electrical equipment in the nuclear power station can be effectively protected. The problems exposed are analyzed and the solutions are put forward, which can also guide the optimization of the layout of electrical equipment in the power station. The introduction of computer simulation in the field of hydropower station design makes the electric design of hydropower station more scientific and more refined.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV734;TM862
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