The paper analyzes the gas insulated switchgears(GIS) anti-maloperation system of the jiuli 220 kV substation,points out the shortcomings,proposes anti-maloperation measures.

• 对事故原因和误操作原因进行了分析,提出了要严格执行"取证上岗"制度、努力实现系统本质安全等防范误操作的措施。