摘要
为选择适合的接地变压器变比及二次侧负载电阻以提高20Hz注入式定子接地保护的测量精度,本文推导出注入信号与中性点接地变压器参数之间的数值关系,并确定二次侧负载电阻以及变比的选型原则,最后以该原则为依据编译了MATLAB/GUIDE可视化程序。以某电厂发电机组为例,通过对原始参数以及优化参数数值化结果进行对比,验证了设计原则的可行性及优越性,通过该方法得到的参数可更好地提升20Hz注入式定子接地保护的性能。
In order to select a suitable grounding transformer ratio and secondary side load resistance to improve the measurement accuracy of the 20Hz injection stator grounding protection.This paper derives the numerical relationship between the injected signal and the parameters of the neutral grounded transformer,and determines the selection principle of the secondary side load resistance and transformation ratio.Finally,based on this principle,the MATLAB/GUIDE visualization program is compiled.Taking a generator set in a power plant as an example,the feasibility and superiority of the design principles are verified by comparing the original parameters and the numerical results of the optimized parameters.The parameters obtained by this method can better improve the performance of the 20Hz injection stator grounding protection.performance.
作者
周靖
傅剑文
郑梦阳
法拉蒂尔
ZHOU Jing;FU Jianwen;ZHENG Mengyang;FA Ladier(State Grid Xinyuan Group Co.Ltd.,Xin’anjiang Hydropower Plant,Hangzhou 311608,China;Guodian NARI Technology Co.Ltd.,Nanjing 211100,China;Zhejiang Yunda Wind Power Co.Ltd.,Hangzhou 311600,China)
出处
《水电与抽水蓄能》
2022年第1期94-98,共5页
Hydropower and Pumped Storage
基金
国家自然科学基金资助项目“一类非线性不确定系统的自抗扰迭代学习控制理论研究”(61773170)。
关键词
可视化程序
注入电源
定子接地保护
保护灵敏度
visualization program
power injection
stator grounding protection
protection sensitivity
