直孔电厂1号发电机励磁参数与涉网保护配合的研究  

Research on the Coordination Between the Excitation System Parameters and the Grid-Related Protection of Zhikong No. 1 Hydropower Generator

作　　者：贾文双[1] 岳雷[1] 杨永军 措姆 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]西藏电力调度中心,西藏自治区拉萨市850000

出　　处：《电网技术》2013年第7期2018-2023,共6页Power System Technology

基　　金：国家电网公司大电网重大专项资助项目(SGCC-MPLG-001-2012)~~

摘　　要：励磁参数与涉网保护的相互配合是源网协调的重要内容,相关内容配合是否合理将对电网安全稳定运行产生重要影响。文章以直孔发电厂1号机组为例,详细分析了强励与励磁变过电流保护的配合问题;论述了过励与发电机转子过负荷保护的配合;基于发电机功角方程提出了转子过负荷导致定子过负荷的工程分析方法,为分析发电机过励与定子过负荷的配合提供了理论依据;从失磁保护阻抗特性出发推导出了失磁保护阻抗圆从阻抗平面到功率平面的通用标准映射方程,为失磁保护阻抗圆与低励限制参数在同一平面进行整定配合校核奠定了基础。上述内容可供相关工程技术人员借鉴。The coordination between the excitation parameters and the grid-related protection is an important content which is significant for secure and stable operation of power grid.This paper studied the coordination problem between the excitation parameters and the grid-related protection in Zhikong hydropower power station No.1 unit.The coordination between the forced excitation and the over current protection of the excitation transformer is analyzed in detail.A novel analysis method based on the generator power angle equation is proposed for the stator overload accident analysis caused by the rotor overload,which provides a theoretical basis for the analysis of the coordination between the forced excitation and the over current protection.According to the characteristic of the loss of excitation protection impedance,general standard mapping equation is deduced by the loss of excitation protection impedance circle from the impedance plane to the power plane,which lays the foundation for the coordination verification of the loss of excitation protection impedance circle and the under excitation limitation parameters on the same plane.The above contents will be practical for the related engineering and technical personnel.

关 键 词：源网协调 涉网保护 过电流保护 过励限制 低励限制 过负荷 失磁保护 

分 类 号：TM72[电气工程—电力系统及自动化]