This engagement focuses on building a grid-compliant PPC model capable of supporting solar, wind and BESS integration.
Project Overview
In modern renewable plants, the PPC defines how the plant behaves during:
- Voltage fluctuations
- Frequency disturbances
- Grid faults
- Ramp rate changes
If the PPC is not properly engineered:
- Voltage support becomes unstable
- Reactive power control fails
- Ride-through performance is rejected
- Grid approval gets delayed
This project addresses these risks through structured dynamic modelling and validation.
Scope of Work – DIgSILENT PPC Dynamic Model
The scope covers complete PPC dynamic model development in DIgSILENT PowerFactory.
- Requirement Gathering & Functional Definition
- Active Power Reference (PREF)
- Reactive Power / Voltage / Power Factor control
- Ramp rate limits
- Droop characteristics
- P/Q priority logic
- Interface signals between PPC and inverter
- DIgSILENT PowerFactory Model Development
- RMS dynamic modelling
- DSL / composite controller implementation
- Active and reactive control loops
- Voltage droop logic
- Ramp rate implementation
- LVRT / HVRT behaviour modelling
- Current and protection limits
- Functional Validation & Performance Optimisation
- Setpoint tracking validation
- Response time verification
- Stability assessment
- Oscillation damping evaluation
- Parameter tuning for grid compliance
Engineering Platform
The PPC model is developed in:
DIgSILENT PowerFactory
Plant and inverter models are treated as interface blocks to validate real system behaviour.
Technical Importance
Grid operators expect:
- Fast voltage regulation
- Stable reactive support
- Accurate ramp rate response
- Predictable ride-through behaviour
A weak PPC model can stop project approval.
Through this assignment, Power Projects strengthens its expertise in advanced DIgSILENT dynamic modelling for renewable grid integration.