IEEE Power & Energy Magazine - March/April 2016 - 49
230 kV
5th
ETC1
E2102
F4
HP
F1
HP
SC2
±110 Mvar
5th
BUS 21
BUS 22
Quebec
SC1
±110 Mvar
ETC2
11th
E2101
13th
SC1
TC3-F6
HP
F2
SC3
HP
TC4-F5
F3
HVdc
Circuit 2
175 MW
80 kV
2,188 A
New
Brunswick
SC3
±110 Mvar
11th
13 kV
13 kV
TC2
E2104
HP
F5-SC3
E2101-TC2
ETC3
13th
F6-SC3
BT
N/O
SC2
230 kV
230 kV
13 kV
13 kV
13 kV
HP
E2104-TC3
TC3
HVdc
Circuit 1
11th
13th
175 MW
80 kV
2,188 A
BUS 24
TC1
BUS 23
E2102-TC1
ETC4
E2103
230 kV
TC4
E2103-TC4
figure 3. The Eel river converter single-line diagram.
✔ modernization of equipment, providing significant
✔ replacing existing air-cooled thyristor valves with new
cost savings through increased energy efficiency and
reduced station service load.
✔ the buildings, including the valve hall and control
room/office building, were structurally sound and had
adequate room to accommodate modern HVdc equipment and controls
✔ the existing converter transformers and smoothing
reactors were in good condition and suitable for reuse.
the scope of the life extension included the following:
liquid-cooled valves
✔ replacing existing evaporative coolers with dry-type
fin-fan coolers
✔ replacing the original analog control system with a
new digital control system
✔ replacing the relay-based control systems with microprocessor-based controls to upgrade the synchronous
condensers
✔ replacing the original excitation systems with new
excitation systems and replacement of the speed sensing and over speed detection instrumentation.
✔ replacing the pony motor starting resistors and adding
vibration monitoring and partial discharge monitoring
equipment
✔ upgrading other facility balance-of-plant systems.
the equipment selection decisions made during the design
and procurement process were based on using proven and
reliable technologies. the project schedule is outlined in
table 4.
During the HVdc upgrade, nBp took the opportunity to
upgrade other systems within the facility, including 4,160and 600-V switchgear; the balance-of-plant programmable
logic controller system (for alarming and other nonprocess functions); control; excitation and instrumentation for
the three synchronous condensers; heating, ventilation, and
air-conditioning systems; 600-V motor control centers; and
other miscellaneous systems.
table 3. The station rating and configuration.
48
Power rating (old and new)
350 MW
Number of circuits
2 × 175 MW each
AC system voltage
230 kV on NBP side and
230 kV on HQ side
Nominal dc voltage (old and
new)
80 kV
Type of link
BtB station
Main purpose of HVdc
Interconnection of
asynchronous networks
HVdc vendor of original
station
GE
HVdc vendor for life
extension
ABB
ieee power & energy magazine
march/april 2016
Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2016
IEEE Power & Energy Magazine - March/April 2016 - Cover1
IEEE Power & Energy Magazine - March/April 2016 - Cover2
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IEEE Power & Energy Magazine - March/April 2016 - Cover3
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