What effect does the protection device have on the time anomaly?

The misoperation of the protection device will greatly reduce the reliability of power supply and easily lead to a vicious accident of large-scale power failure. The misoperation of protection device refers to that in the power system, the relay protection and automatic device send out the wrong action instruction to trip the normal circuit breaker. Although the misoperation of the protection device greatly reduces the reliability of power supply, it will not cause serious damage to the primary equipment.

Compared with the protection device refusing to operate, refusing to operate is more harmful.

The protection device refuses to act, which means that in the power system, relay protection and automatic devices should give action instructions, but they don't, which is also commonly known as action without action, and the consequences of refusing to act are extremely serious. For example, when the line fails, the line protection does not act, which may cause vicious accidents such as line disconnection.

Line protection is generally configured with overcurrent and quick break. Quick-break refers to the trip of quick-break protection for interphase short circuit in the front section of the line, and overcurrent refers to the trip of overcurrent protection at the end of the line.

When there is a fault or abnormal working condition in the power system, the faulty equipment will be automatically cut off from the system in the shortest time and in the smallest area as possible, or the personnel on duty will send a signal to eliminate the root cause of abnormal working condition, so as to reduce or avoid the damage to the equipment and the influence on the power supply in the adjacent areas.