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In recent years, Zhongshan has promoted the integration of urban and rural construction, and the cable rate is very high, and the 10 kV cable often fails
due to the continuous rise of the electricity load.
Emergency repair is urgent, difficult, and the fault location caused by old equipment has become the short board of each power supply sub-bureau, which has been plaguing the emergency repair team
of each power supply sub-bureau.
Xu, the elder of the emergency repair team of the Dachong Power Supply Branch, told reporters: "In the past, the emergency repair team of the branch held a bridge to test faults
.
The limitations of this equipment are very large, and it is often difficult to fail for
various reasons.
Usually after the load is brought by other lines, we open it to find it, sometimes for several days, which seriously affects the repair of the cable
.
"There are so many fish ponds in Dachong that they cannot be cut off, and cable failure is the most headache
.
"
The emergency repair team of the power supply sub-bureau only maintains the line below 10 kV, the voltage level is not too high for the power grid, the equipment and technical force equipped are not as strong as the transmission management, and whenever the cable repair problem is encountered, it is necessary to consult or borrow tools, which wastes a lot of time
.
According to this problem, the sub-bureaus held several meetings to cooperate with the equipment management department to study solutions
.
Finally, a temporary
assistance plan was drawn up for the Transmission Management Institute.
According to Zhang Zhifang, the head of the cable shift of the transmission management station, when going to the 10 kV fault site, the approximate location of the cable fault is generally measured by the "three-pulse method", and if there is no fault waveform, it is judged to be a high-resistance fault, and it will immediately switch to DC high voltage for burn-through
.
Finally, after a rough test, it can be accurately positioned
.
These jobs are common methods when managing mainnet cables, and the voltage level is high, requiring precision instruments and qualified staff to operate, but it is difficult for the emergency repair class to manage the distribution network
.
Today, 10 kV cable fault points can be found in less than half an hour
.
In recent years, Zhongshan has promoted the integration of urban and rural construction, and the cable rate is very high, and the 10 kV cable often fails
due to the continuous rise of the electricity load.
Emergency repair is urgent, difficult, and the fault location caused by old equipment has become the short board of each power supply sub-bureau, which has been plaguing the emergency repair team
of each power supply sub-bureau.
Xu, the elder of the emergency repair team of the Dachong Power Supply Branch, told reporters: "In the past, the emergency repair team of the branch held a bridge to test faults
.
The limitations of this equipment are very large, and it is often difficult to fail for
various reasons.
Usually after the load is brought by other lines, we open it to find it, sometimes for several days, which seriously affects the repair of the cable
.
"There are so many fish ponds in Dachong that they cannot be cut off, and cable failure is the most headache
.
"
The emergency repair team of the power supply sub-bureau only maintains the line below 10 kV, the voltage level is not too high for the power grid, the equipment and technical force equipped are not as strong as the transmission management, and whenever the cable repair problem is encountered, it is necessary to consult or borrow tools, which wastes a lot of time
.
According to this problem, the sub-bureaus held several meetings to cooperate with the equipment management department to study solutions
.
Finally, a temporary
assistance plan was drawn up for the Transmission Management Institute.
According to Zhang Zhifang, the head of the cable shift of the transmission management station, when going to the 10 kV fault site, the approximate location of the cable fault is generally measured by the "three-pulse method", and if there is no fault waveform, it is judged to be a high-resistance fault, and it will immediately switch to DC high voltage for burn-through
.
Finally, after a rough test, it can be accurately positioned
.
These jobs are common methods when managing mainnet cables, and the voltage level is high, requiring precision instruments and qualified staff to operate, but it is difficult for the emergency repair class to manage the distribution network
.
Today, 10 kV cable fault points can be found in less than half an hour
.
