Analysis and improvement for WXH-802 distance protection malfunction;

Analysis on the reason of the differential protection malfunction of the start & stand-by auxiliary transformer

Analysis and disposal of primary transformer protection misoperation;

Analysis of the main transformer differential protection misoperation for the failure outside of the region;

Due to manufacturing defects in some equipment,many problems were discovered during the on-site electrical test,such as structure defects and protection misoperations,etc.

By means of analysis on abnormal conditions of thermal protection in practice,problems which should be taken note of in logic implement of thermal protection signals were discussed and some strategies to improve reliability of these signals were given in this paper.

This paper introduces the important impact of thermal protection system reliability to the unit security.

This paper analyzes and summarizes the reasons for maloperation and failure of thermal protection,and proposes countermeasures to prevent them.

By analyzing the abnormal operations of the thermal process protections for the 4 generating units in Fengcheng power plant,measures for improvement were put forth and implemented.

By analyzing the abnormal operations of the thermal process protections for the 4 generating units in Mawan General Power Plant, me asures for improvement were put forth and implemented.