Overhead Line Fault Indicator Safe And Automatic

First, Overhead Line Fault Indicator the instantaneous failure, coincidence Successful treatment program:

1. Overhead Line Fault Indicator Line on both sides of the station to check a second device without exception, with continued operating conditions;

2. Overhead Line Fault Indicator According to the fault on both sides of the line recorder and distance measurement to protect the distance to determine the scope of the fault point, according to the scope of fault inspection line;

3. Overhead Line Fault Indicator Did not identify the equipment before the damage, do the line again gate or power outage treatment plan.

Second, Overhead Line Fault Indicator permanent failure, coincidence is not a treatment program

1. According to the line after the gate running mode, the timely handling of the line off the gate caused by the overload, the local power grid to solve the abnormal situation;

2. The following circumstances, can not be forced to send:

(1) full cable line (according to fault recorder ranging, fault in the cable range);

(2) the line has live work;

(3) line transformer group switch trip, can not bring the transformer to send;

(4) has been found to be a fault phenomenon;

(5) line three-phase failure;

(6) test run line;

(7) other clearly defined lines that can not be delivered.

4.Overhead Line Fault Indicator Line on both sides of the plant to check a second device no exception, can be considered strong delivery, strong end selection principle:

(1) for the power plant and the network connection line, by the substation side of the strong delivery;

(2) switch off the number of failures and switch off the large capacity of one end;

(3) to protect the sound and can quickly move the end of the trip;

(4) after the failure of a single power supply substation, by the opposite side of the station to send strong;

(5) the stability of the power grid regulations are required to implement.

5. Overhead Line Fault Indicator After the success of the line to send, according to the fault recorder ranging and protection ranging, to determine the scope of the fault point, according to the fault range with inspection line, check the equipment damage.

6. Overhead Line Fault Indicator Line in the maintenance unit did not identify the equipment before the damage, do the line again gate or power outage treatment plan.

7. Overhead Line Fault Indicator Line can not send a strong line immediately power outage.

Third, the line disconnection treatment program:

1. Line disconnection failure occurs, the general existence of the following phenomena:

(1) three-phase current imbalance, one phase or two-phase current is zero;

(2) one end of the line switch off the gate, the other end of the switch to run.

2. When the line disconnection occurs, the line should be immediately power outage, eliminating the system operation of the asymmetric component.

Fourth, the same pole and the same line of the same line with the name of the fault handling program:

1. with the pole and the same line with the same name of the same phase fault, the probability is low but serious consequences, after the event, the general will have the following:

(1) the same tower double-circuit line at the same time off the gate, will cause a larger range of transfer, may lead to the same transmission cross-related components over-current;

(2) the same tower double-circuit line at the same time off the gate, in the power grid structure is relatively weak areas will lead to more than the stability of the line limit, causing safe automatic device action; and may lead to local power grid and the main network solution.

2. When the same line with the same name phase fault, first adjust the power plant related to the output, to eliminate overcurrent phenomenon, for the removal of the load, should consider the transfer load; for the removal of the unit should be resumed after the line to consider power transmission Boot

3. When the same line of the same line with the fault, the occurrence of power grid accident, the first deal with the grid after the power balance of the problem, to be resolved after the isolated network stability, and then consider the recovery problem;

4. Synonyms with the same name, the line reclosing generally do not coincide, the dispatcher can be stable after the frequency and trend, select the appropriate line for trial delivery.