基于功角直接测量及预测的发电机失步预测保护  

A study on microprocessor-based predictive out of step protection for large generator units

作　　者：严伟[1] 陆于平[1] 李鹏[1] 

机构地区：[1]东南大学电气工程系,江苏南京210096

出　　处：《继电器》2001年第3期20-22,26,共4页Relay

摘　　要：针对发电机失步预测保护所存在的问题 ,介绍了一种基于功角直接测量的自回归预测失步的方法 ,并在此基础上提出了一套完整的保护方案。通过对算法的精度和误差进行了数字仿真分析 ,表明这种方案的精度较高。基于此方法实现的大型发电机失步及失步预测保护与传统的保护相比 ,物理概念明确 ,对失步的预测及判别更加完善。目前 。In order to avoid the problems caused by traditional predictive out of step protection, this paper presents a method to measure the power angle directly and bring forward an algorithm to predict the variety of power angle. Based on these, a complete microprocessor based predictive out of step protection scheme is put forward.The accuracy of the algorithm and the analysis of the error is simulated by using digital simulation. The result shows that the method is more accurate and simpler than those traditional methods. Its clear concept and high accuracy will do good to the predictive out of step protection. Now, the new predictive out of step protection is under developing.

关 键 词：电力系统 失步预测保护 功角直接测量 发电机组 自回归模型 

分 类 号：TM772[电气工程—电力系统及自动化]