Table 3 Historical failure records of some equipment of wind power plants.

From: Condition-based opportunistic maintenance strategy for multi-component wind turbines by using stochastic differential equations

Turbine_ID

Component

Timestamp

Remarks

T01

GEARBOX

2016-07-18T02:10:00 + 00:00

Gearbox pump damaged

T06

GENERATOR

2016-07-11T19:48:00 + 00:00

Generator replaced

T06

GENERATOR

2016-07-24T17:01:00 + 00:00

Generator temperature sensor failure

T06

GENERATOR

2016-09-04T08:08:00 + 00:00

High temperature generator error

T06

GENERATOR

2016-10-27T16:26:00 + 00:00

Generator replaced

T06

GENERATOR

2016-10-02T17:08:00 + 00:00

Refrigeration system and temperature sensors in generator replaced

T06

HYDRAULIC_GROUP

2016-04-04T18:53:00 + 00:00

Error in pitch regulation

T07

GENERATOR_BEARING

2016-04-30T12:40:00 + 00:00

High temperature in generator bearing (replaced sensor)

T07

TRANSFORMER

2016-07-10T03:46:00 + 00:00

High temperature transformer

T07

TRANSFORMER

2016-08-23T02:21:00 + 00:00

High temperature transformer. Transformer refrigeration repaired

T09

GEARBOX

2016–10-11T08:06:00 + 00:00

Gearbox repaired

T09

GENERATOR_BEARING

2016-06-07T16:59:00 + 00:00

High temperature generator bearing

T09

GENERATOR_BEARING

2016-08-22T18:25:00 + 00:00

High temperature generator bearing

T09

GENERATOR_BEARING

2016-10-17T09:19:00 + 00:00

Generator bearings replaced

T11

GENERATOR

2016-03-03T19:00:00 + 00:00

Electric circuit error in generator

T11

HYDRAULIC_GROUP

2016-10-17T17:44:00 + 00:00

Hydraulic group error in the brake circuit