【摘要】：目前我國正在大力發(fā)展智能電網(wǎng)建設(shè)，其中智能變電站的建設(shè)是建設(shè)智能電網(wǎng)的核心內(nèi)容。建設(shè)智能變電站要對(duì)現(xiàn)有的變電站進(jìn)行智能化改造，主要是實(shí)現(xiàn)一次設(shè)備的智能化，也就是用電子互感器代替?zhèn)鹘y(tǒng)的互感器，使用智能開關(guān)代替?zhèn)鹘y(tǒng)的高壓開關(guān)，從而實(shí)現(xiàn)變電站內(nèi)高壓電路和低壓電路的有效隔離，保證變電站工作的穩(wěn)定性和維護(hù)的簡便性。目前為保證智能變電站中一次設(shè)備智能化的實(shí)現(xiàn)，便引入一種叫智能終端的設(shè)備，也可以稱之為控制單元。通過這種設(shè)備來實(shí)現(xiàn)使傳統(tǒng)的一次設(shè)備智能化，有利于傳統(tǒng)變電站智能化改造。智能開關(guān)控制單元就是一種智能終端，這種設(shè)備在智能電網(wǎng)建設(shè)中是不可或缺的。針對(duì)目前國內(nèi)這種設(shè)備的產(chǎn)品并不多，技術(shù)上還不統(tǒng)一和成熟，而且其市場需求大，所以智能開關(guān)控制單元這種設(shè)備還很值得研究。 本文首先介紹了智能控制單元的研究背景，設(shè)備的特點(diǎn)及其國內(nèi)外發(fā)展現(xiàn)狀。接下來研究了控制單元的微機(jī)保護(hù)算法，介紹了一些傳統(tǒng)算法，并創(chuàng)造性地提出了新的算法，并通過仿真分析比較幾種算法，說明了新算法的優(yōu)越性，確定了控制單元所采用的算法。對(duì)于控制單元如何實(shí)現(xiàn)線路保護(hù)進(jìn)行了研究，主要是如何實(shí)現(xiàn)分段電流保護(hù)，重點(diǎn)研究了反時(shí)限過流保護(hù)及其配合的問題，對(duì)于實(shí)際應(yīng)用提供了一些參考。對(duì)于高壓系統(tǒng)中的單相自動(dòng)重合閘還涉及到故障選相問題，這里研究并確定了計(jì)算方法和選相方案。 考慮到控制單元的實(shí)際應(yīng)用，對(duì)控制單元的硬件上采用了模塊化設(shè)計(jì)，設(shè)計(jì)了主控電路板、采樣電路板，，還設(shè)計(jì)了采樣互感器線圈。通過一定的實(shí)驗(yàn)，對(duì)硬件進(jìn)行了測試，驗(yàn)證了設(shè)計(jì)的可行性。 對(duì)智能開關(guān)控制單元仍需要進(jìn)一步研究，本文研究的內(nèi)容為其后續(xù)的研究提供了一些可靠的支持與參考。
[Abstract]:At present, smart grid construction is being vigorously developed in China, among which the construction of intelligent substation is the core content of smart grid construction. To build intelligent substations, we should carry out intelligent transformation of existing substations, mainly to realize the intelligentization of primary equipment, that is, to use electronic transformers instead of traditional transformers, and to use intelligent switches to replace traditional high-voltage switches. Thus, the high voltage circuit and low voltage circuit in substation can be separated effectively, and the stability and maintenance of substation can be ensured. At present, in order to ensure the intelligent realization of primary equipment in intelligent substation, a kind of equipment called intelligent terminal is introduced, which can also be called control unit. The traditional primary equipment is intelligentized by this equipment, which is beneficial to the intelligent transformation of traditional substation. Intelligent switch control unit is a kind of intelligent terminal, which is indispensable in the construction of smart grid. At present, there are not many products of this kind of equipment in our country, the technology is not uniform and mature, and its market demand is large, so the intelligent switch control unit is worth studying. This paper first introduces the research background of intelligent control unit, the characteristics of the equipment and its development status at home and abroad. Then, the microcomputer protection algorithm of control unit is studied, some traditional algorithms are introduced, and some new algorithms are creatively proposed, and the superiority of the new algorithm is illustrated through the simulation analysis and comparison of several algorithms. The algorithm used in the control unit is determined. The control unit how to realize the line protection is studied, mainly how to realize the segmented current protection, especially the inverse time overcurrent protection and its coordination, which provides some references for the practical application. For the single phase automatic reclosing in high voltage system, the fault phase selection problem is also involved. The calculation method and phase selection scheme are studied and determined here. Considering the practical application of the control unit, the hardware of the control unit is designed by modularization, the main control circuit board, the sampling circuit board and the sampling transformer coil are designed. Through certain experiments, the hardware is tested and the feasibility of the design is verified. The intelligent switch control unit still needs further research, and the content of this paper provides some reliable support and reference for its subsequent research.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM564

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