330kV变电站设计和运行问题研究

发布时间：2018-11-25 07:40

【摘要】：随着科学技术的进步和经济的发展,电力电网发展速度也随之增快,这对电网的设计和电力一、二次设备的选型要求也有所提高。330kV及以上等级的变电站在西部建设中迅猛发展,由于建设地理条件的错综复杂和其他客观条件限制,如何设计枢纽330kV变电站和高效利用电气设备是西北电网建设、改造中,需要研究和解决的一个重要课题。本文以西北某330kV变电站为例,实际分析了该变电站设计运行中存在的问题,并提出了一定的改进方案。论文的主要内容如下:首先,本文在总结其发展成果的基础上,研究了国内外330kV变电站设计领域的发展情况,根据实际工程要求,提出了330kV变电站的设计目标。新建的月牙湖330kV变电站不但可以提高银川市滨河新区供电质量的可靠性还能满足银川市滨河新区新增负荷的供电需求。本文对月牙湖330kV变电站的概括从安全性、经济性及可靠性方面考虑,确定了三个等级的主接线方式,根据负荷计算及短路电流确定了主变压器台数、容量及型号,通过Matlab/Simulink软件搭建模型进行稳态仿真分析。逐一对断路器、隔离开关、互感器进行了选型,并设计了相关继电保护配置和电气设备平面布置,使变电站电气一、二次部分的设计基本完成。根据变电站的负荷、主接线方式和设备的运行情况,对电气设备进行了评估分析,统计电气设备故障情况,体现出当前变电站设计上的功能性不足。例举现场设备故障,利用Matlab软件搭建模型对变压器和继电保护装置进行系统的仿真分析,运用现场试验数据的“标准对比法”分析出互感器故障的原因。通过总结主要一、二次设备故障产生的原因,提出相关整改预防措施,从而达到设备能正常运行的目的。针对变电站直流系统运行存在的问题及对策进行了分析讨论。结合实际情况给出了对应的解决措施。在现有直流系统的基础上提出了优化配置方案,通过Matlab软件搭建模型进行仿真分析来验证优化后的直流系统可靠性。最后介绍了变电站综合自动化系统运行中存在的问题,提出了防范措施和整改意见。对原有系统从通信、计量等装置的配置提出了优化配置方案,进行了可靠性计算分析。
[Abstract]:With the progress of science and technology and the development of economy, the speed of power grid development is also increasing. The selection requirements of secondary equipment have also been improved. Substations of 330kV and above have developed rapidly in the construction of western China, due to the complexity of construction geographical conditions and other objective conditions, How to design the hub 330kV substation and make efficient use of electrical equipment is an important subject to be studied and solved in the construction and transformation of Northwest Power Grid. Taking a 330kV substation in Northwest China as an example, this paper analyzes the problems existing in the design and operation of the substation, and puts forward some improvement schemes. The main contents of this paper are as follows: firstly, based on the summary of the development results, this paper studies the development of 330kV substation design field at home and abroad, and puts forward the design objectives of 330kV substation according to the actual engineering requirements. The newly built Yueqihu 330kV substation can not only improve the reliability of power supply quality in Binhe New area of Yinchuan City, but also meet the power supply demand of additional load in Binhe New area of Yinchuan City. In this paper, considering the safety, economy and reliability of the 330kV substation, three grades of main connection mode are determined, and the number, capacity and type of the main transformer are determined according to the load calculation and short-circuit current. The steady state simulation analysis is carried out by building a model with Matlab/Simulink software. The circuit breakers, isolators and transformers are selected one by one, and the relaying protection configuration and the layout of electrical equipment are designed, so that the design of the first and second parts of the substation is basically completed. According to the load of substation, the main connection mode and the operation of equipment, the electrical equipment is evaluated and analyzed, and the fault situation of electrical equipment is counted, which reflects the functional deficiency of substation design at present. In this paper, the system simulation analysis of transformer and relay protection device is carried out by using Matlab software, and the cause of transformer fault is analyzed by using the "standard contrast method" of field test data. By summing up the causes of the main primary and secondary equipment failures, the paper puts forward the relevant preventive measures to achieve the purpose of normal operation of the equipment. The problems and countermeasures of DC system operation in substation are analyzed and discussed. Combined with the actual situation, the corresponding solutions are given. On the basis of the existing DC system, the optimal configuration scheme is proposed, and the reliability of the optimized DC system is verified by the simulation and analysis of the model built by Matlab software. Finally, the problems existing in the operation of substation integrated automation system are introduced, and the preventive measures and corrective suggestions are put forward. The optimal configuration scheme of the original system from communication, metering and other devices is put forward, and the reliability calculation is carried out.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM63

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