Digital twin network

Asset twin registry

Live twins of the generating units in this role's scope — 29 units across 11 stations — grouped by station, with location, sensor readings, health scores and six-month vibration trends. This role is mapped to the whole fleet.

Simulated telemetry

Assets monitored

2,547 MW

Total capacity

Critical assets

High risk

75%

Average fleet health

Site

Risk

Security fabric behind the twin

Zero trust · OT-awareReference architecture29 unit identities · 11 stations attested

Microsoft Entra ID

Every twin session is identity-bound: phishing-resistant MFA, conditional access per role, and just-in-time elevation through PIM instead of standing access.

Zero standing privilege

Microsoft Defender for IoT

Passive OT sensors inventory each plant network and baseline its traffic. The twin consumes that model and keeps no command path back to a unit.

Passive only · read-only twin

Microsoft Purview

Twin telemetry carries a Confidential — Operational sensitivity label that travels with every export, alongside data-lineage on the source register.

Labelled at source

Microsoft Sentinel

Twin reads, AI suggestions and approvals are written to one audit trail with 12-month retention, correlated with plant and identity events.

12-month retention

Illustrative control design, not a live VRA deployment: identity, OT monitoring, labelling and audit are the four controls that make a twin safe to show — the register never writes to a plant, and every claim on this page is traceable in Sources.

Akosombo Unit 1

Akosombo · 170 MW · Age 61 yr

LowTTF 231d

2.4 mm/s52°C93.4%

Vibration

2.40 mm/s

Temperature

52 °C

Efficiency

93.4 %

Health score86/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Akosombo Unit 2

Akosombo · 170 MW · Age 61 yr

LowTTF 214d

2.9 mm/s54°C92.8%

Vibration

2.88 mm/s

Temperature

54 °C

Efficiency

92.8 %

Health score81/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Akosombo Unit 3

Akosombo · 170 MW · Age 61 yr

CriticalTTF 78d

6.9 mm/s61°C84.0%

Vibration

6.94 mm/s

Temperature

61 °C

Efficiency

84.0 %

Health score41/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Akosombo Unit 4

Akosombo · 170 MW · Age 61 yr

MediumTTF 197d

3.1 mm/s55°C91.4%

Vibration

3.05 mm/s

Temperature

55 °C

Efficiency

91.4 %

Health score76/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Akosombo Unit 5

Akosombo · 170 MW · Age 61 yr

LowTTF 245d

2.3 mm/s52°C93.9%

Vibration

2.26 mm/s

Temperature

52 °C

Efficiency

93.9 %

Health score90/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Akosombo Unit 6

Akosombo · 170 MW · Age 61 yr

HighTTF 153d

4.3 mm/s57°C88.1%

Vibration

4.34 mm/s

Temperature

57 °C

Efficiency

88.1 %

Health score63/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Six 170 MW units, commissioned 1965

Kpong Unit 1

Kpong (Akuse) · 40 MW · Age 44 yr

LowTTF 224d

2.7 mm/s51°C92.0%

Vibration

2.66 mm/s

Temperature

51 °C

Efficiency

92.0 %

Health score84/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Kpong Unit 2

Kpong (Akuse) · 40 MW · Age 44 yr

HighTTF 136d

5.1 mm/s56°C86.3%

Vibration

5.05 mm/s

Temperature

56 °C

Efficiency

86.3 %

Health score58/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Kpong Unit 3

Kpong (Akuse) · 40 MW · Age 44 yr

LowTTF 241d

2.3 mm/s48°C93.5%

Vibration

2.33 mm/s

Temperature

48 °C

Efficiency

93.5 %

Health score89/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Kpong Unit 4

Kpong (Akuse) · 40 MW · Age 44 yr

MediumTTF 184d

3.4 mm/s53°C90.2%

Vibration

3.38 mm/s

Temperature

53 °C

Efficiency

90.2 %

Health score72/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Four 40 MW units downstream of Akosombo, at Akuse

TAPCO Unit 1

Aboadze T1 · 110 MW · Age 26 yr

HighTTF 133d

4.8 mm/s372°C87.5%

Vibration

4.80 mm/s

Temperature

372 °C

Efficiency

87.5 %

Health score57/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

TAPCO Unit 2

Aboadze T1 · 110 MW · Age 26 yr

MediumTTF 190d

3.2 mm/s358°C91.2%

Vibration

3.22 mm/s

Temperature

358 °C

Efficiency

91.2 %

Health score74/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

TAPCO Unit 3

Aboadze T1 · 110 MW · Age 26 yr

LowTTF 221d

2.9 mm/s350°C92.3%

Vibration

2.86 mm/s

Temperature

350 °C

Efficiency

92.3 %

Health score83/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Three 110 MW gas / LCO units

TT1PP Unit 1

Tema T1 · 27.5 MW · Age 18 yr

HighTTF 156d

4.3 mm/s345°C88.8%

Vibration

4.26 mm/s

Temperature

345 °C

Efficiency

88.8 %

Health score64/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

TT1PP Unit 2

Tema T1 · 27.5 MW · Age 18 yr

MediumTTF 207d

2.9 mm/s335°C91.7%

Vibration

2.94 mm/s

Temperature

335 °C

Efficiency

91.7 %

Health score79/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

TT1PP Unit 3

Tema T1 · 27.5 MW · Age 18 yr

MediumTTF 180d

3.8 mm/s342°C90.0%

Vibration

3.85 mm/s

Temperature

342 °C

Efficiency

90.0 %

Health score71/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

TT1PP Unit 4

Tema T1 · 27.5 MW · Age 18 yr

LowTTF 224d

2.8 mm/s332°C92.5%

Vibration

2.77 mm/s

Temperature

332 °C

Efficiency

92.5 %

Health score84/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Four 27.5 MW units in the Tema Thermal Power Complex

TT2PP Unit 1

Tema T2 · 40 MW · Age 11 yr

LowTTF 231d

2.7 mm/s318°C93.0%

Vibration

2.71 mm/s

Temperature

318 °C

Efficiency

93.0 %

Health score86/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

TT2PP Unit 2

Tema T2 · 40 MW · Age 11 yr

CriticalTTF 105d

5.4 mm/s366°C85.6%

Vibration

5.41 mm/s

Temperature

366 °C

Efficiency

85.6 %

Health score49/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Two 40 MW units, second phase of the complex

KTPS Unit 1

Kpone · 110 MW · Age 11 yr

LowTTF 218d

2.9 mm/s341°C92.2%

Vibration

2.88 mm/s

Temperature

341 °C

Efficiency

92.2 %

Health score82/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

KTPS Unit 2

Kpone · 110 MW · Age 11 yr

MediumTTF 187d

3.5 mm/s353°C90.3%

Vibration

3.54 mm/s

Temperature

353 °C

Efficiency

90.3 %

Health score73/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Kpone 330 kV transformer T2

Kpone · Transformer · Age 11 yr

CriticalTTF 68d

5.8 mm/s75°C87.8%

Vibration

5.85 mm/s

Temperature

75 °C

Efficiency

87.8 %

Health score38/100

Vibration trend · 6 monthsmm/s

MayJunJulAugSepOct

Two 110 MW dual-fuel units plus the 330 kV transformer

Unit capacities reconcile to the published 2,547 MW installed total. Sensor values, health scores and time-to-failure estimates are simulated for demonstration and animate while the view is live. The twin is read-only: no command path to a plant exists.