河北南网两起高频保护误动作事故分析与对策

Analysis on two Malfunctions of High Frequency Protection in Hebei Southern Power System and Their Countermeasures

通过河北南网发生两起高频保护误动作事故，分析是由生产厂家制造错误和回路接线错误所致。并提出了对ＪＳＦ－１１Ｃ装置的漏制造的印刷条用跨线连接焊好；取消与９０１微机保护配合的收发讯机的“位置停讯”回路；利用９０１内部远方启迅逻辑；９０１保护与ＳＦ—６００可采用单对接点连接。

Two malfunction failures of High frequency protection occurred in Hebei Southern Power Grid. By analyzing,the causes of the failures were found due to manufacture error in circuit wiring. A missing segment of printed circuit in JSF 110 device was connected with a jumper, Cancel the circuit of “position stop of communication” in the receiver transmitter unit in coordination with 901 microcomputer based protection; Make use of the remote start logic in the 901; The 901 protection and SF 600 can be connected with single pair of contact.