【摘要】：隨著全球范圍內(nèi)人口和環(huán)境壓力的增加,如何節(jié)約能源,降低損耗和降低排放是擺在各國面前的一個重要問題。智能電網(wǎng)的建設(shè),對電網(wǎng)安全、可靠、高效運(yùn)行,實(shí)現(xiàn)節(jié)能減排、帶動相關(guān)產(chǎn)業(yè)發(fā)展具有重要意義。現(xiàn)有智能變電站初步實(shí)現(xiàn)了全站信息數(shù)字化、通信網(wǎng)絡(luò)平臺化、信息共享標(biāo)準(zhǔn)化、高級應(yīng)用互動化,提升了變電站運(yùn)行維護(hù)水平和安全可靠性。但是在智能變電站整體水平與建設(shè)世界一流電網(wǎng)的要求還存在差距。為此,國家電網(wǎng)公司提出建設(shè)新一代智能變電站的目標(biāo)。本文在此背景下研究,針對220kV新一代智能變電站設(shè)計(jì)進(jìn)行研究,提出新一代智能變電站電氣設(shè)計(jì)方案,為今后新一代智能變電站設(shè)計(jì)和建設(shè)提供借鑒和參考。本文首先介紹了智能變電站的基本理論,闡述了智能電網(wǎng)的發(fā)展背景、主要范疇和典型特征,以此引出建設(shè)智能變電站的必要性。在介紹智能變電站作用、構(gòu)成、典型特征和設(shè)計(jì)原則之后,分析了現(xiàn)階段智能變電站建設(shè)所取得的成果和存在的不足,引出了建設(shè)新一代智能變電站的必要性。之后從層次化保護(hù)、智能一次設(shè)備、智能二次設(shè)備、變電站布局優(yōu)化和無功優(yōu)化六方面給出了詳細(xì)的解決方案。最后針對未來城及所在電網(wǎng)實(shí)際情況,詳細(xì)設(shè)計(jì)了未來城新一代智能變電站。通過潮流計(jì)算確定了導(dǎo)線截面積,并進(jìn)行了穩(wěn)定性校驗(yàn)。通過短路電流計(jì)算確定了主變阻抗及限流電抗器。按照正常運(yùn)行考慮過載情況下的負(fù)載最大電流確定了母線型號。在站內(nèi)一次設(shè)備方面詳細(xì)設(shè)計(jì)了主變及主接線形式,通過短路電流和工作電流確定了其他主要的一次設(shè)備。根據(jù)新一代智能變電站層次化保護(hù)與控制的要求,設(shè)計(jì)了站內(nèi)層次化保護(hù)控制系統(tǒng),及各元件保護(hù)配置方案。此外還詳細(xì)設(shè)計(jì)了站內(nèi)遠(yuǎn)動信息和設(shè)備、電能計(jì)量配置和二次系統(tǒng)安全防護(hù)配置。最后對設(shè)計(jì)方案的投資和節(jié)電進(jìn)行了分析。本設(shè)計(jì)滿足未來城地區(qū)用電需求,加強(qiáng)了分區(qū)電網(wǎng)結(jié)構(gòu),提高了地區(qū)電網(wǎng)的可靠性,能夠有效緩解未來城地區(qū)電源點(diǎn)緊張的問題。
[Abstract]:With the increase of global population and environmental pressure, how to save energy, reduce loss and reduce emissions is an important issue facing countries. The construction of smart grid is of great significance to the safe, reliable and efficient operation of power grid, the realization of energy saving and emission reduction, and the development of related industries. The existing intelligent substation has realized the information digitization of the whole station, the communication network platform, the information sharing standardization, the advanced application interaction, and has improved the substation operation maintenance level and the security reliability. However, there is still a gap between the overall level of smart substation and the requirement of building world-class power grid. To this end, the State Grid Company proposed to build a new generation of smart substation objectives. Under this background, this paper studies the new generation intelligent substation design of 220kV, puts forward the new generation intelligent substation electrical design plan, provides the reference and the reference for the next generation intelligent substation design and construction. In this paper, the basic theory of intelligent substation is introduced, and the development background, main category and typical characteristics of smart substation are expounded, which leads to the necessity of constructing intelligent substation. After introducing the function, composition, typical characteristics and design principles of intelligent substation, the achievements and shortcomings of intelligent substation construction at present are analyzed, and the necessity of constructing a new generation intelligent substation is introduced. Then the detailed solutions are given from the following six aspects: hierarchical protection, intelligent primary equipment, intelligent secondary equipment, substation layout optimization and reactive power optimization. Finally, according to the actual situation of the future city and its power grid, a new generation of intelligent substation is designed in detail. The traverse cross-section area is determined by power flow calculation, and the stability check is carried out. The main transformer impedance and current limiting reactor are determined by short circuit current calculation. The bus type is determined according to the maximum current of the load considering overload in normal operation. The main transformer and the main connection form are designed in detail in the primary equipment of the station. The other main primary equipments are determined by the short-circuit current and the working current. According to the requirements of the new generation intelligent substation hierarchical protection and control, the hierarchical protection control system in the station and the protection configuration scheme of each component are designed. In addition, the telecontrol information and equipment, electric energy metering configuration and secondary system security protection configuration are designed in detail. Finally, the investment and power saving of the design scheme are analyzed. This design can meet the demand of the future city area, strengthen the structure of the district power network, improve the reliability of the regional power network, and can effectively alleviate the problem of the shortage of power supply points in the future city area.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM63;TM76

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