220kV新一代智能变电站设计方案研究

发布时间：2018-09-09 10:13

【摘要】：随着全球范围内人口和环境压力的增加,如何节约能源,降低损耗和降低排放是摆在各国面前的一个重要问题。智能电网的建设,对电网安全、可靠、高效运行,实现节能减排、带动相关产业发展具有重要意义。现有智能变电站初步实现了全站信息数字化、通信网络平台化、信息共享标准化、高级应用互动化,提升了变电站运行维护水平和安全可靠性。但是在智能变电站整体水平与建设世界一流电网的要求还存在差距。为此,国家电网公司提出建设新一代智能变电站的目标。本文在此背景下研究,针对220kV新一代智能变电站设计进行研究,提出新一代智能变电站电气设计方案,为今后新一代智能变电站设计和建设提供借鉴和参考。本文首先介绍了智能变电站的基本理论,阐述了智能电网的发展背景、主要范畴和典型特征,以此引出建设智能变电站的必要性。在介绍智能变电站作用、构成、典型特征和设计原则之后,分析了现阶段智能变电站建设所取得的成果和存在的不足,引出了建设新一代智能变电站的必要性。之后从层次化保护、智能一次设备、智能二次设备、变电站布局优化和无功优化六方面给出了详细的解决方案。最后针对未来城及所在电网实际情况,详细设计了未来城新一代智能变电站。通过潮流计算确定了导线截面积,并进行了稳定性校验。通过短路电流计算确定了主变阻抗及限流电抗器。按照正常运行考虑过载情况下的负载最大电流确定了母线型号。在站内一次设备方面详细设计了主变及主接线形式,通过短路电流和工作电流确定了其他主要的一次设备。根据新一代智能变电站层次化保护与控制的要求,设计了站内层次化保护控制系统,及各元件保护配置方案。此外还详细设计了站内远动信息和设备、电能计量配置和二次系统安全防护配置。最后对设计方案的投资和节电进行了分析。本设计满足未来城地区用电需求,加强了分区电网结构,提高了地区电网的可靠性,能够有效缓解未来城地区电源点紧张的问题。
[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.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM63;TM76

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