新型数字式发电机定子接地保护的研究  

Research of digital generator stator grounding protection

作　　者：万慧 吴济安[2] 陆于平[1] 

机构地区：[1]东南大学电气工程系,江苏南京210096 [2]国电南京自动化股份有限公司,江苏南京210003

出　　处：《电力自动化设备》2002年第11期7-10,共4页Electric Power Automation Equipment

摘　　要：基于平衡原理的定子接地保护研究成果的基础上,提出了用于数字式新型发电机定子接地保护。该保护能满足不同容量和接线方式的发电机组定子接地保护的要求,保护算法不受发电机中性点接地方式的影响;同时,接地电阻判据可由基于平衡原理的保护算法求得,基波零序电压可由机端和中性点的电压互感器(TV)获取,对于基波零序电压的取值要考虑到主变高压侧接地时的影响。Based on the achievements of the proposed stator grounding protection applying equilibrium principle,a complete digital stator grounding protection scheme is advanced.It meets the requirements of stator grounding protection for the generators of different capacity and connection mode.Its protection algorithm is not affected by the grounding mode of generator's neutral point .The grounding resistance is calculated by protection algorithm based on equilibrium principle.The fundamental wave voltage of zero sequence is obtained from the terminal PT and neutral point PT of generator,and the value should take into account the influence of the grounded main transformer's high voltage side.

关 键 词：数字式发电机 定子 接地保护 中性点接地 

分 类 号：TM31[电气工程—电机]