需要金幣： 1000 個金幣 |
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| 折扣與優(yōu)惠：團購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要:廠用電保護的配置及整定計算直接關(guān)系到廠用設(shè)備的正常可靠運行，繼而影響到電廠的安全和穩(wěn)定。隨著電力工業(yè)的迅速發(fā)展，我國發(fā)電機、變壓器單機容量不斷增大，電力系統(tǒng)正朝著“大機組、超高壓、大電網(wǎng)”的方向發(fā)展。如今我國大容量電廠不斷變多，它們在電力系統(tǒng)中地位更加顯得重要。為了保證整個電力系統(tǒng)的安全運行，我們應(yīng)對電廠配置可靠性、靈敏性、選擇性和速動性都很好的保護裝置。 我的本次畢業(yè)設(shè)計的主要內(nèi)容是針對110KV電力系統(tǒng)繼電保護的配置，然后根據(jù)繼電保護配置原理，對所選擇的保護進行整定計算和靈敏度校驗，確定所選保護。計算標(biāo)幺值，短路電流，確定運行的方式。然后確定各種設(shè)備的保護配置，有變壓器、母線、輸電線、發(fā)電機。對于變壓器，主保護采用縱聯(lián)差動保護與瓦斯保護，優(yōu)勢互補。對于母線來說，采用完全電流差動保護，簡單可靠。后備保護采用復(fù)合電壓啟動過電流保護。 關(guān)鍵詞 繼電保護；標(biāo)幺值；整定計算；電流保護
Abstract:The configuration and setting calculation of electricity protection in the power plant have direct links to the regular and stable running of the equipments in the plant, which in turn affects the safety and stability of the power plant. With the rapid development of power industry, the power system is heading for the development of “larger unit, higher pressure and bigger grid” since the unit capacity of generators and transformers has been ever increasing. Nowadays with the increasing number of high-capacity power plants, the configuration and calculation play a more significant role in the power system. In order to ensure the safe running of the whole power system, we should carefully protect the configuration of the power plant in terms of its reliability, flexibility, selectivity and velocity. My graduation project mainly focuses on the configuration of relaying protection of 110KV power system. Based on the principle of relaying protection configuration, I calculate the selected protection and examine its sensitivity so as to determine the chosen one. I also calculate the per-unit value and short circuit current so as to determine the running mode. Then I am able to decide the protection configuration of all equipments, such as transformers, bus bars, transmission lines and power generators. As for transformers, the main method is the combination of longitudinal differential protection and gas protection, which are complementary to each other. When it comes to bus bars, the simple and easy way is to use fully current differential protection and over-current protection of composite voltage start is adopted for back-up protection. Keywords relaying protection per-unit value setting calculation current protection |
