π Case Study
Wind Farm Grid Connection Study
Steady-state overvoltage (>1.08 p.u.) during light-load night conditions; reactive power absorption causing instability warnings
ποΈ Project Overview
320 MW onshore wind farm connecting to 220 kV transmission node in low-inertia region
π― Challenge
Steady-state overvoltage (>1.08 p.u.) during light-load night conditions; reactive power absorption causing instability warnings
π§ Design Approach
Dynamic reactive compensation using wind turbine AVRs + switched shunt reactors; inclusion of aggregated WTG models with Type IV converter controls
π Design Diagram
AI-generated project design illustration
π Key Calculations
Reactive Power Absorption Margin
Q_abs_max = S_rated Γ β(1 β PFΒ²)
Result: β128 MVAR
Set upper absorption limit to avoid grid code violations
Voltage Rise per MW Injection
ΞV β (P Γ R + Q Γ X)/V_base
Result: +0.0023 p.u./MW
Predicted 0.74 p.u. rise at full outputβtriggered reactor switching logic
π Results
Max voltage limited to 1.068 p.u.; zero reactive curtailment events; successful ENTSO-E compliance verificationπ‘ Lessons Learned
- β’Aggregate modeling must preserve reactive capability envelopesβnot just active power dispatch
- β’Night-mode reactive scheduling requires separate load flow initialization
β Key Takeaways
- 1Aggregate modeling must preserve reactive capability envelopesβnot just active power dispatch
- 2Night-mode reactive scheduling requires separate load flow initialization
π Prerequisites
Understand these before this topic
π Engineering Applications
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