本文選題：高壓試車(chē)　切入點(diǎn)：港機(jī)　出處：《大連理工大學(xué)》2015年碩士論文

【摘要】：大連市靠近海岸,港口是其重要的城市特色。港口中大型機(jī)械的動(dòng)力依賴(lài)高壓電機(jī),電機(jī)的運(yùn)行情況決定了港口的工作效率,為電機(jī)供電的配電系統(tǒng)尤為重要。尤其是海港不同區(qū)在電力調(diào)度的過(guò)程中,電能的分配極為不均,許多大功率負(fù)載是間歇性工作,需要在短時(shí)間內(nèi)對(duì)系統(tǒng)進(jìn)行供電補(bǔ)給,對(duì)靈活性的要求很高。本文研究了采用一種試車(chē)的方法搭建一套臨時(shí)的供電系統(tǒng),用以連接電力網(wǎng)與用電設(shè)備,可以做到隨用隨搭,機(jī)動(dòng)性、靈活性較好。本文從企業(yè)的實(shí)際要求立足,分析了海港大型機(jī)械供電的特殊性,并提出了利用現(xiàn)有試車(chē)搭建臨時(shí)高壓供電系統(tǒng)的方案。這種方案具有靈活性,易于維護(hù),成本低的特點(diǎn)。按照電力設(shè)計(jì)的流程進(jìn)行主接線的規(guī)劃,確定主接線方案,同時(shí)根據(jù)負(fù)荷的大小估算了變壓器的容量,并在考慮各種裕量的情況下確定了變壓器臺(tái)數(shù)與容量。同時(shí)在主接線方案中,闡述了各種高壓開(kāi)關(guān)設(shè)備選型的理論依據(jù),一并進(jìn)行了選擇,并根據(jù)相關(guān)國(guó)標(biāo)進(jìn)行了核算校驗(yàn)。企業(yè)中提供了幾種電纜作為電力輸送介質(zhì),本文從電力電纜的型號(hào)開(kāi)始著手分析對(duì)比,確定了不同試車(chē)所用的電纜型號(hào),與理論計(jì)算的通流能力進(jìn)行了對(duì)比,保證能夠配送足夠的容量。同時(shí)為了解決電纜的敷設(shè)問(wèn)題,將多種敷設(shè)方式進(jìn)行了分析比對(duì),選擇了最有利于現(xiàn)場(chǎng)實(shí)施的橋架式敷設(shè)。在主體設(shè)計(jì)完成后,計(jì)算了各種保護(hù)設(shè)備應(yīng)有的通流能力、動(dòng)作時(shí)間等參數(shù),分別對(duì)變壓器的繼電保護(hù)和線路的保護(hù)進(jìn)行了計(jì)算,其結(jié)果可以應(yīng)用于各種繼電保護(hù)設(shè)備的選型。最后,在臨時(shí)供電高壓系統(tǒng)的線路完成后進(jìn)行了性能的測(cè)試,測(cè)試結(jié)果表明臨時(shí)供電系統(tǒng)供電可靠。
[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.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U653.95

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