METHOD AND SYSTEM FOR REARRANGING SOUND CONDUCTORS IN PARALLEL LINES IN POWER TRANSMISSION

1 . A method for rearranging sound conductors included in parallel lines in power transmission, wherein the parallel lines comprise at least a first line (L 1 ) and a second line (L 2 ), each of which includes N conductors ( 1 A, 1 B, and 1 C; or, 2 A, 2 B, and 2 C), where N is an integer number greater than or equal to 3, the method comprises:

selecting any N sound conductors ( 1 B, 1 C, 2 C) which are not all included in one line, among the 2N conductors ( 1 A, 1 B, and 1 C; 2 A, 2 B, and 2 C) included in the two lines (L 1 , L 2 ); and

connecting each of one or more unselected conductors ( 1 A) included in the first line (L 1 ) to a corresponding one of one or more selected sound conductors ( 2 C) included in the second line (L 2 ) while keeping the second line (L 2 ) tripped, so that a reconstructed line is formed by using the N selected sound conductors ( 1 B, 1 C, 2 C) to resume power transmission of the first line (L 1 ).

2 . The method of claim 1 , wherein a first link switch (LD 1 ) is arranged behind a breaker/current transformer of the first line (L 1 ) and a second link switch (LD 2 ) is arranged behind a breaker/current transformer of the second line (L 2 ), such that each pole of the first line switch (LD 1 ) corresponds to a conductor of the first line (L 1 ), and each pole of the second line switch (LD 2 ) corresponds to a conductor of the second line (L 2 ), each of one or more poles of the first line switch (LD 1 ) corresponding to the one or more unselected conductors ( 1 A) in the first line (L 1 ) is connected to a corresponding one of one or more poles of the second line switch (LD 2 ) corresponding to the one or more selected conductors ( 2 C) in the second line (L 2 ), the connecting each of one or more unselected conductors ( 1 A) included in the first line (L 1 ) to a corresponding one of one or more selected sound conductors ( 2 C) included in the second line (L 2 ) comprises:

closing the one or more poles of the first line switch (LD 1 ) corresponding to the one or more unselected conductors ( 1 A) in the first line (L 1 ) while keeping the other poles of the first line switch (LD 1 ) opened, and closing the one or more poles of the second line switch (LD 2 ) corresponding to the one or more selected conductors ( 2 C) in the second line (L 2 ) while keeping the other poles of the second line switch (LD 2 ) opened.

3 . The method of claim 2 , wherein a first outgoing switch (OD 1 ) is arranged behind the first link switch (LD 1 ) on the first line (L 1 ), and a second outgoing switch (OD 2 ) is arranged behind the second link switch (LD 2 ) on the second line (L 2 ), each pole of the first outgoing switch (OD 1 ) corresponds to a conductor of the first line (L 1 ), and each pole of the second outgoing switch (OD 2 ) corresponds to a conductor of the second line (L 2 ), when connecting each of one or more unselected conductors ( 1 A) included in the first line (L 1 ) to a corresponding one of one or more selected sound conductors ( 2 C) included in the second line (L 2 ), one or more poles of the first outgoing switch (OD 2 ) corresponding to the one or more unselected conductors ( 1 A) of the first line (L 1 ) are opened while the other poles of the first outgoing switch (OD 2 ) are closed, one or more poles of the second outgoing switch (OD 2 ) corresponding to the one or more selected conductors ( 2 C) of the second line (L 2 ) are closed while the other poles of the second outgoing switch (OD 2 ) are opened.

4 . The method of claim 3 , wherein the first and second outgoing switches (OD 1 , OD 2 ) are single-pole and remote controllable.

5 . The method of claim 2 , wherein the first and second line switches (LD 1 , LD 2 ) are single-pole and remote controllable.

6 . The method of claim 3 , wherein the first line switch (LD 1 ) and the first outgoing switch (OD 1 ) are controlled by a first control device arranged on the first line, and the second line switch (LD 2 ) and the second outgoing switch (OD 2 ) are controlled by a second control device arranged on the second line, the first control device and the second control device communicate with each other to control the switches (LD 1 , LD 2 , OD 1 , OD 2 ) cooperatively.

7 . The method of claim 6 , wherein the communication between the first control device and second control device is conducted via IEC61650 Generic Objected-Oriented Substation Event (GOOSE), or serial/parallel communication, or Transmission Control Protocol/Internet Protocol (TCP/IP), or hard wiring between the devices.

8 . The method of claim 6 , wherein the first control device (IED 1 ) and the second control device (IED 2 ) are intelligent electronic devices.

9 . The method of claim 6 , wherein an interlocking logic is utilized by each of the control devices, to guarantee that each of the breakers is opened before operating the switches (LD 1 , LD 2 , OD 1 , OD 2 ); if the second line switch (LD 1 ) is closed, the breaker of the second line (L 2 ) is not allowed to be closed; and a pole of the first line switch (LD 1 ) and a pole of the first outgoing switch (OD 1 ) which correspond to a same conductor of the first line (L 1 ) are not allowed to be closed at the same time.

10 . The method of claim 9 , wherein each of the switches (LD 1 , LD 2 , OD 1 , OD 2 ) is a disconnector, the interlocking logic is further adapted to guarantee that only one pole of each of the line disconnectors (LD 1 , LD 2 ) can be closed at each side at any time.

11 . A system for rearranging sound conductors included in parallel lines in power transmission, wherein the parallel lines comprise at least a first line (L 1 ) and a second line (L 2 ) each of which includes N conductors ( 1 A, 1 B, and 1 C; 2 A, 2 B, and 2 C), where N is an integer number greater than or equal to 3, the system comprises:

a first outgoing switch (OD 1 ), arranged on the first line (L 1 ), each pole of the first outgoing switch (OD 1 ) corresponds to a conductor of the first line (L 1 );

a second outgoing switch (OD 2 ), arranged on the second line (L 2 ), each pole of the second outgoing switch (OD 2 ) corresponds to a conductor of the second line (L 2 );

a first line switch (LD 1 ), arranged between the first outgoing switch (OD 1 ) and a breaker/current transformer of the first line (L 1 ); and

a second line switch (LD 2 ), arranged between the second outgoing switch (OD 2 ) and a breaker/current transformer of the second line (L 2 ),

wherein each of poles of the first line switch (LD 1 ) corresponds to a conductor of the first line (L 1 ), and each of poles of the second line switch (LD 2 ) corresponds to a conductor of the second line (L 2 ), each of the poles of the first line switch (LD 1 ) corresponds to a corresponding one of the poles of the second line switch (LD 2 ).

12 . The system of claim 11 , wherein the first and second line switches (LD 1 , LD 2 ), and the first and second outgoing switches (OD 1 , OD 2 ) are single-pole and remote controllable.

13 . The system of claim 11 , further comprising:

a first control device, arranged on the first line, adapted to control the first line switch (LD 1 ) and the first outgoing switch (OD 1 ); and

a second control device, arranged on the second line, adapted to control the second line switch (LD 2 ) and the second outgoing switch (OD 2 ),

wherein the first control device and the second control device communicate with each other to control the switches (LD 1 , LD 2 , OD 1 , OD 2 ) cooperatively.

14 . The system of claim 13 , wherein the communication between the first control device and second control device is conducted via IEC61650 Generic Objected-Oriented Substation Event (GOOSE), or serial/parallel communication, or Transmission Control Protocol/Internet Protocol (TCP/IP), or hard wiring between the devices.

15 . The system of claim 11 , further comprising:

an interlocking logic, adapted to be utilized by each of the control devices to guarantee that only one pole of each of the line switches (LD 1 , LD 2 ) can be closed at each side at any time; each of the breakers is opened before the switches (LD 1 , LD 2 , OD 1 , OD 2 ) are operated; if the second line switch (LD 1 ) is closed, the breaker of the second line (L 2 ) is not allowed to be closed; and

a pole of the first line switch (LD 1 ) and a pole of the first outgoing switch (OD 1 ) which correspond to a same conductor of the first line (L 1 ) are not allowed to be closed at the same time.

16 . The system of claim 12 , further comprising:

a first control device, arranged on the first line, adapted to control the first line switch (LD 1 ) and the first outgoing switch (OD 1 ); and

a second control device, arranged on the second line, adapted to control the second line switch (LD 2 ) and the second outgoing switch (OD 2 ),

wherein the first control device and the second control device communicate with each other to control the switches (LD 1 , LD 2 , OD 1 , OD 2 ) cooperatively.

17 . The system of claim 13 , wherein the communication between the first control device and second control device is conducted via IEC61650 Generic Objected-Oriented Substation Event (GOOSE), or serial/parallel communication, or Transmission Control Protocol/Internet Protocol (TCP/IP), or hard wiring between the devices.

18 . The system of claim 17 , further comprising:

an interlocking logic, adapted to be utilized by each of the control devices to guarantee that only one pole of each of the line switches (LD 1 , LD 2 ) can be closed at each side at any time; each of the breakers is opened before the switches (LD 1 , LD 2 , OD 1 , OD 2 ) are operated; if the second line switch (LD 1 ) is closed, the breaker of the second line (L 2 ) is not allowed to be closed; and

a pole of the first line switch (LD 1 ) and a pole of the first outgoing switch (OD 1 ) which correspond to a same conductor of the first line (L 1 ) are not allowed to be closed at the same time.

19 . A method for rearranging sound conductors included in parallel lines in power transmission, wherein the parallel lines comprise at least a first line (L 1 ) and a second line (L 2 ), each of which includes N conductors ( 1 A, 1 B, and 1 C; 2 A, 2 B, and 2 C), where N is an integer number greater than or equal to 3, the method comprises:

arranging a first outgoing switch (OD 1 ) on the first line (L 1 ), each pole of the first outgoing switch (OD 1 ) corresponding to a conductor of the first line (L 1 );

arranging a second outgoing switch (OD 2 ) on the second line (L 2 ), each pole of the second outgoing switch (OD 2 ) corresponding to a conductor of the second line (L 2 );

arranging a first line switch (LD 1 ) between the first outgoing switch (OD 1 ) and a breaker/current transformer of the first line (L 1 ); and

arranging a second line switch (LD 2 ) between the second outgoing switch (OD 2 ) and a breaker/current transformer of the second line (L 2 ).

20 . The method of claim 19 , wherein each of poles of the first line switch (LD 1 ) corresponds to a conductor of the first line (L 1 ), each of poles of the second line switch (LD 2 ) corresponds to a conductor of the second line (L 2 ), and each of the poles of the first line switch (LD 1 ) corresponds to a corresponding one of the poles of the second line switch (LD 2 ).