الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
 |  | from | 80 |  |  |
| | | from | 80 | | |
المستخلص
This thesis presents the delayed and instant operation scheme of the adaptive non¬. cation protection technique for power lines. In this technique, protection relays bipping or reclosure decisions adapting to system and fault conditions without the for communication links. The non communication is achieved by the detection of or not the system is in a balanced operation, in order to identify the breaker at the remote end of the protected section. The adaptive relay will trip by delayed when the fault is detected as a single phase to ground fault and it will trip by instant when the fault is detected as a double phase fault or three phase fault. Simulation with responses to various system and fault condition have shown that the technique to give fast and correct response without the need for a communication link.
The technique is simulated using the PSCAD/EMTDC program, which is used to dM: response of the adaptive digital relay in different types of fault. It is also used to , the effect of different parameters like fault location and loading angle.