What is outdoor auto recloser?
What should you know about outdoor auto recloser?
What are the features of outdoor auto recloser?
How about the development trend of outdoor auto recloser?
What should you know about outdoor auto recloser?
Outdoor auto recloser is an automatic device that automatically turns on the circuit breaker that has tripped due to a fault as required. Outdoor auto recloser is a device that can open at the time of fault and reclose after a delay or without delay. The power system adopts an outdoor auto recloser, which greatly improves the reliability of power supply, reducing power outage losses, improving the level of the power system and enhancing the transmission capacity of the line.
The shortest interval time allowed for outdoor auto recloser is 0.15 to 0.5 seconds. The higher the rated voltage of the line, the longer the insulation deionization time. The success rate of outdoor auto recloser depends on changes inline structure, voltage level, meteorological conditions, and main fault types. According to the statistics of China’s electric power department, outdoor auto recloser is generally up to 60% to 90%.
What are the features of outdoor auto recloser?
It is realized that 80 to 90 % of all the faults held on overhead lines are transient in nature, which creates a long lag in restoration times if done manually. Outdoor auto recloser’s primary objective is to reduce outage time in distribution lines by providing rapid restore to power lines. Outdoor auto recloser is done by automatically closing the line after a pre-determined delay. Usually, the temporary faults would clear themselves in the first or second dead time. If the fault is of permanent nature, the outdoor auto recloser will enter into lockout state after giving the final closure attempt. After the outdoor auto recloser is in lockout condition, it remains in open position until it is manually closed by an operator. Outdoor auto recloser states the event of operation which occurs sequentially before the device enters into lockout mode at the end of cycle. One of the important characteristics of smart grid from a conventional grid is the self-healing capacity that outdoor auto recloser plays a crucial role.
How about the development trend of outdoor auto recloser?
Most of the faults that occur in the power system are transient faults. In order to shorten the power outage time and reduce economic losses, outdoor auto recloser is widely used in the power system. According to the statistics of the existing system operation, the success rate of outdoor auto recloser is generally about 60% to 90%. The use of outdoor auto recloser has played a great role in providing the continuity of power supply during transient faults, the stability of system operation, and the correction of false trips caused by the malfunction of circuit breakers or relay protection.
At present, the coupling voltage criterion with outdoor auto recloser has been able to better distinguish between instantaneous and permanent faults. The research on the optimal coincidence time has made practical progress. The research on offline calculation and how to cooperate with the fixed coincidence interval time have been relatively complete.
Post time: Nov-26-2022