Appendix B of I.00-11-001 included a list of 37 transmission projects (32 by PG&E, 3 by SCE, and 2 by SDG&E).

Table D-1 identifies the 31 project summaries (write-ups) that appear in Appendix B of this report. The following reconciles the differences between the 31 project summaries and the list of 37 projects in Appendix B of I.00-11-001.

Table D-2 provides a summary status of those 37 projects. The project number, project title, current estimated in-service date, and any relevant comments are included. Some projects were already completed in 2000; some were combined with other projects; some are actually targeted for 2002 or beyond; and others should not have initially been on the list at all. Because of this, there are only 23 of the 37 projects originally listed in Appendix B of I.00-11-001 required write-ups in this appendix.

Table D-3 lists 8 transmission projects previously not identified in Appendix B of I.00-11-001. Write-ups for these 8 projects appear in this appendix.

Appendix E

ELECTRICAL GLOSSARY

Electrical Glossary

Air Switch

A device that opens an electric circuit. Equivalent to a home light switch. Used to isolate lines or pieces of equipment.

Bus

A wire or tube that electrically connects pieces of equipment or lines in a substation. Think of them as roads in a housing development that connect all the houses.

Capacitor Bank

Capacitors are electrically charged plates that are used to rise voltage. A capacitor bank is many charged plated connected together. There are two types of capacitor banks: shunt and series. Shunt capacitors are connected between a line and the grounding point (In other words, they shunt the current to ground). Series capacitors are connected in-line with a circuit.

Capacity

The amount of power available to service the customer.

Circuit

A wire that connects a generator to substation, a substation to a substation, or a substation to a house. A circuit is equivalent to a road that connects two towns.

Circuit Breaker

A device that is used in switching energized electric lines or in interrupting energy flow to lines and equipment during an outage.

Constraint

Physical and operational limitations in the transfer of electrical power

Contingency

An operating condition where not all lines and equipment are operating. When the electric system is operating with one line, transformer, or generator out of service, this is referred as an N-1 contingency.

General Order

Regulatory rules established by the CPUC for energy, telecommunications, water, and rail safety and carriers.

Transmission Line

A circuit or two circuits on the same tower (wood, steel, or concrete) that connects a generator to a substation, or a substation to a substation. A transmission line is equivalent to a road that connects two towns. Usually operates at voltages above 44 kV (for example, 500 kV, 230 kV, 115 kV, or 60 kV).

Distribution Line

A circuit that connects a house to a substation. Usually the circuit is mounted on wood poles. A distribution line is equivalent to a road that connects a house to a town. Usually operates at voltages below 44 kV (for example, 34 kV, 21 kV, 12kv, 4 kV).

N-1 Contingency

A term which is used in planning studies to say that a transformer or a transmission line is out of service.

Path

A transmission line or a group of transmission lines that the Western States Coordinating Committee (WSCC) has assigned unique numbers that connect two distinguish areas. Power flows are generally in synchronization with each other. Paths are generally referenced in planning and/or operating studies.

Reconductoring

Replacing the conductor on a circuit with a conductor with a higher energy capacity.

Relay

A device that automatically senses either voltage, current, or frequency or a combination and then automatically takes an action to operate a circuit breaker.

Reliability Must Run

The minimum generation required to be on line to maintain system reliability.

Re-rate

Giving substation equipment or transmission lines a higher energy capacity by changing engineering criteria.

Stability

Balancing generation capacity with customer load demand. All generation in synchronization (all in step together).

Substation

A consolidation point for transmission or distribution lines where energy is switched and redirected to customer loads.

Tap

A line that connects a substation or generator to the electric grid so they can import or export energy. Generally referred to as a "Line Tap".

Transformer

A device that increases voltage (step up) or decreases voltage (step down). Generally, transformer refers to one transformer in a bank of three transformers.

Transformer Bank

An arrangement of three transformers. Transformer and transformer bank is used interchangeability in writings or discussions.



Air Switch	A device that opens an electric circuit. Equivalent to a home light switch. Used to isolate lines or pieces of equipment.
Bus	A wire or tube that electrically connects pieces of equipment or lines in a substation. Think of them as roads in a housing development that connect all the houses.
Capacitor Bank	Capacitors are electrically charged plates that are used to rise voltage. A capacitor bank is many charged plated connected together. There are two types of capacitor banks: shunt and series. Shunt capacitors are connected between a line and the grounding point (In other words, they shunt the current to ground). Series capacitors are connected in-line with a circuit.
Capacity	The amount of power available to service the customer.
Circuit	A wire that connects a generator to substation, a substation to a substation, or a substation to a house. A circuit is equivalent to a road that connects two towns.
Circuit Breaker	A device that is used in switching energized electric lines or in interrupting energy flow to lines and equipment during an outage.
Constraint	Physical and operational limitations in the transfer of electrical power
Contingency	An operating condition where not all lines and equipment are operating. When the electric system is operating with one line, transformer, or generator out of service, this is referred as an N-1 contingency.
General Order	Regulatory rules established by the CPUC for energy, telecommunications, water, and rail safety and carriers.
Transmission Line	A circuit or two circuits on the same tower (wood, steel, or concrete) that connects a generator to a substation, or a substation to a substation. A transmission line is equivalent to a road that connects two towns. Usually operates at voltages above 44 kV (for example, 500 kV, 230 kV, 115 kV, or 60 kV).
Distribution Line	A circuit that connects a house to a substation. Usually the circuit is mounted on wood poles. A distribution line is equivalent to a road that connects a house to a town. Usually operates at voltages below 44 kV (for example, 34 kV, 21 kV, 12kv, 4 kV).
N-1 Contingency	A term which is used in planning studies to say that a transformer or a transmission line is out of service.
Path	A transmission line or a group of transmission lines that the Western States Coordinating Committee (WSCC) has assigned unique numbers that connect two distinguish areas. Power flows are generally in synchronization with each other. Paths are generally referenced in planning and/or operating studies.
Reconductoring	Replacing the conductor on a circuit with a conductor with a higher energy capacity.
Relay	A device that automatically senses either voltage, current, or frequency or a combination and then automatically takes an action to operate a circuit breaker.
Reliability Must Run	The minimum generation required to be on line to maintain system reliability.
Re-rate	Giving substation equipment or transmission lines a higher energy capacity by changing engineering criteria.
Stability	Balancing generation capacity with customer load demand. All generation in synchronization (all in step together).
Substation	A consolidation point for transmission or distribution lines where energy is switched and redirected to customer loads.
Tap	A line that connects a substation or generator to the electric grid so they can import or export energy. Generally referred to as a "Line Tap".
Transformer	A device that increases voltage (step up) or decreases voltage (step down). Generally, transformer refers to one transformer in a bank of three transformers.
Transformer Bank	An arrangement of three transformers. Transformer and transformer bank is used interchangeability in writings or discussions.