港机调试临时高压供电系统设计

发布时间：2018-04-06 04:17

本文选题：高压试车　切入点：港机　出处：《大连理工大学》2015年硕士论文

【摘要】：大连市靠近海岸,港口是其重要的城市特色。港口中大型机械的动力依赖高压电机,电机的运行情况决定了港口的工作效率,为电机供电的配电系统尤为重要。尤其是海港不同区在电力调度的过程中,电能的分配极为不均,许多大功率负载是间歇性工作,需要在短时间内对系统进行供电补给,对灵活性的要求很高。本文研究了采用一种试车的方法搭建一套临时的供电系统,用以连接电力网与用电设备,可以做到随用随搭,机动性、灵活性较好。本文从企业的实际要求立足,分析了海港大型机械供电的特殊性,并提出了利用现有试车搭建临时高压供电系统的方案。这种方案具有灵活性,易于维护,成本低的特点。按照电力设计的流程进行主接线的规划,确定主接线方案,同时根据负荷的大小估算了变压器的容量,并在考虑各种裕量的情况下确定了变压器台数与容量。同时在主接线方案中,阐述了各种高压开关设备选型的理论依据,一并进行了选择,并根据相关国标进行了核算校验。企业中提供了几种电缆作为电力输送介质,本文从电力电缆的型号开始着手分析对比,确定了不同试车所用的电缆型号,与理论计算的通流能力进行了对比,保证能够配送足够的容量。同时为了解决电缆的敷设问题,将多种敷设方式进行了分析比对,选择了最有利于现场实施的桥架式敷设。在主体设计完成后,计算了各种保护设备应有的通流能力、动作时间等参数,分别对变压器的继电保护和线路的保护进行了计算,其结果可以应用于各种继电保护设备的选型。最后,在临时供电高压系统的线路完成后进行了性能的测试,测试结果表明临时供电系统供电可靠。
[Abstract]:Dalian is close to the coast, port is its important urban characteristics.The power of large machinery in the port depends on the high voltage motor. The working efficiency of the port is determined by the running condition of the motor, and the power distribution system for the motor is particularly important.Especially in the process of power dispatching in different areas of the harbour, the distribution of electric energy is extremely uneven. Many high-power loads work intermittently and need to supply the power supply to the system in a short time, so the flexibility is very high.In this paper, a test run method is used to build a temporary power supply system, which is used to connect the power network with the electric equipment. It is easy to use, mobile and flexible.Based on the actual requirements of enterprises, this paper analyzes the particularity of large-scale mechanical power supply in seaports, and puts forward a scheme of building temporary high-voltage power supply system by using existing test runs.This scheme has the characteristics of flexibility, easy maintenance and low cost.According to the process of power design, the main connection plan is determined, and the capacity of transformer is estimated according to the load, and the number and capacity of transformer are determined under the condition of considering various kinds of margin.At the same time, in the main wiring scheme, the theoretical basis for the selection of various high-voltage switchgear is expounded, and the selection is carried out, and the accounting verification is carried out according to the relevant national standards.In the enterprise, several kinds of cables are provided as power transmission medium. This paper begins with the analysis and comparison of the types of power cables, determines the cable models used in different test runs, and compares them with the theoretical calculation of the current transfer capacity.Ensure adequate delivery capacity.At the same time, in order to solve the problem of cable laying, various laying methods are analyzed and compared.After the main body design is finished, the parameters such as current passing capacity and operation time of various protective devices are calculated, and the relay protection and line protection of transformer are calculated respectively. The results can be applied to the selection of various relay protection equipment.Finally, the performance of the power supply system is tested after the circuit is completed, and the test results show that the power supply system is reliable.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U653.95

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