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
IEEE Power & Energy Magazine - March/April 2016 - 1
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IEEE Power & Energy Magazine - March/April 2016 - 114
IEEE Power & Energy Magazine - March/April 2016 - Cover3
IEEE Power & Energy Magazine - March/April 2016 - Cover4
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