Improve power performance
Assess wind sensing, yaw, pitch and control deviations; verify energy gains and applicable settlement rules
DASHENG TECHNOLOGY
Technical O&M
Precision O&M: Three Value Objectives
Reduce unplanned downtime
Link events, work orders and operating states to losses; distinguish alarms from verified root causes
Manage major-component risk
Investigate lubrication, hydraulics and load indicators; avoid double-counting repair and downtime costs
Value objectives, not verified returns. Define energy, downtime and repair-cost boundaries to avoid double counting.
Technical O&M & Turbine Condition Management
500 MW
Current capacity under O&M
Company-provided figure, September 2026Engineering expertise
Turbine expertise, field verification and engineering judgment
AI-assisted diagnostics
Screen anomalies and track trends with maintenance knowledge
Maintenance decision support
Prioritize checks and prepare repair plans, people and parts
AI supports the process; authorized professionals approve maintenance and operating decisions
System Issues: Yaw, Hydraulics & Lubrication
| System and symptom | Evidence and field checks | Action and verification |
|---|---|---|
| Yaw: misalignment, frequent moves or slip | Link alignment, power and yaw events; separate sensing, strategy and brake issues | Check offsets; review control and brakes; verify power performance and wear exposure |
| Hydraulics: pressure drops and frequent recharge | Check pressure, pump and actuator states; inspect sensors, leakage and accumulators | Repair the identified circuit issue; retest pressure build-up, retention and response |
| Lubrication and cooling: delivery issues or heating | Review temperature residuals, vibration and work orders; check delivery, filters and cooling | Restore delivery and cooling as justified; track temperature and vibration under comparable conditions |
Problem patterns and investigation routes from supplied material, not confirmed diagnoses. Validate model-specific actions and trade-offs.
System Issues: Measurement, Control & Rotor
| System and symptom | Evidence and field checks | Action and verification |
|---|---|---|
| Measurement: drift, stuck values or scaling errors | Cross-check power, wind and temperature; the source withdrew an initial power-capping diagnosis | Verify instruments, input ranges and scaling; reassess performance using corrected data |
| Control: parameters, parts and versions do not match | Link parameter snapshots and change records to operating groups; verify applicable configuration | Review changes and retain rollback; verify function, protection and operating response |
| Rotor: pitch offsets and blade-angle differences | Combine angle measurement, power and vibration; distinguish sensing, aerodynamic and mass effects | Correct and remeasure to turbine requirements; verify energy and load effects separately |
Problem patterns and investigation routes from supplied material, not confirmed diagnoses. Validate model-specific actions and trade-offs.
Diagnostics Linked to Field Action
Identify
Data screening and field inspection
Assess
Verify evidence and priorities
Execute
Maintenance plan and resources
Verify
Condition checks and recurrence tracking
Deliverables: asset records, defect lists, maintenance plans and post-maintenance reviews
Case and application
Precision O&M Cases: Yaw, Hydraulics & Temperature
Yaw alignment & strategy
Three yaw-angle distributions differ in width. Review power, yaw activity and operating conditions.
Records: Check vane zero, deadband and delays. Test under matched conditions and compare alignment and yaw duty.
Hydraulic pressure drop
Median pressure drops: 3.0 / 8.3 / 5.0 bar across three groups, with 59 turbine summaries.
Records: Check sensors, pumps, valves, accumulators and leakage. Use pressure-holding tests to define repairs.
Temperature & recurring stops
One turbine over 18 months: temperature residuals versus stop/recovery events. Peak residual: 6.36°C.
Records: Check lubrication, cooling and sensors. Select actions using operating and work-order evidence, then retest.
Source: supplied precision O&M review aggregates. Actions are verification pathways; realized benefits are unverified.
Explore these cases interactively ↗Precision O&M: Yaw Distribution and Strategy
3 yaw-angle frequency distributions
What the figure shows
Distribution widths differ. Interpret them with yaw counts and duration, without treating them as measured energy gains.
Field verification
Check strategy version, wind bins, deadband and delays; assess action count, duration and loading.
Action and retest
If differences persist under matched conditions, test the strategy within a defined scope. Otherwise rebuild a comparable baseline.
Supplied aggregates. Raw sampling, filtering, calibration and independence not reproduced; full sampling window not supplied.
Source case explorer ↗Case and application
Hydraulics: Pressure Drops & Field Checks
Compare the supplied groups
Compare the supplied pressure-drop summaries to prioritize turbine-level checks
Check the hydraulic circuit
Verify circuit design, actuation, sensors, accumulators and pump supply before diagnosing damage
View chart data
| Rank / group | Minimum | Median | Maximum |
|---|---|---|---|
| A n=20 | 2.0 | 3.0 | 5.0 |
| B n=25 | 5.3 | 8.3 | 20.2 |
| C n=14 | 2.0 | 5.0 | 5.0 |
20/25/14 turbines by group; not event counts; sampling period unspecified
Redrawn from supplied summaries. Sampling period, filters and calibration are incomplete; differences do not establish faults or returns.
Precision O&M: Temperature and Stop Records
18 months, one turbine and fleet medians
What the figure shows
Temperature residuals and stop events share a monthly index. Temporal proximity does not establish causality.
Field verification
Match power and ambient temperature; check grease, lubrication supply, cooling and sensors; consolidate alarms into actual events.
Action and retest
If field checks confirm a lubrication or cooling issue, plan maintenance and retest. If measurements or event definitions differ, correct data first.
The source window is Jan 2025–Jun 2026, displayed as month indices. These are repeated observations, not 18 independent turbines. The full temperature-residual model has not been reproduced.
Source case explorer ↗Case and application
Precision O&M: Data Case Explorer
From differences to field action
Explore ten cases covering wind measurement, yaw, hydraulics, pitch and more.
From system differences to field checks and remediation plans
Redrawn source aggregates. Raw measurements not revalidated. For analytical demonstration, not confirmed diagnoses or verified gains.
CONTACT
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Business enquiries
zhuo.wu@ds-techcn.com+86 152 3118 3837Beijing headquarters