Energy Management LayerPower Plant Controller
Power Plant Controller
(PPC)
IEC 61850-compliant Power Plant Controller with automatic IEC 61131-3 code generation. Ensures full grid code compliance for utility-scale solar, wind, and hybrid plants — from LVRT/HVRT ride-through to frequency response and reactive power regulation.
IEC 61850IEC 61131-3LVRT/HVRTFSM/LFSMQ(U) ControlSIL 2ENTSO-ENERC
PPC Status — Solar Plant Alpha
Active Power
47.3 / 50.0 MW
Reactive Power
12.1 / 15.0 MVAr
Power Factor
0.969 lag
Grid Frequency
50.02 Hz ✓
Voltage (POC)
132.4 kV ✓
Ramp Rate
2.5 MW/min
<100ms
Response Time
SIL 2
Safety Level
99.99%
Availability
Grid Code Compliance Functions
Full compliance with ENTSO-E, NERC, IEC, and regional grid codes including EWEC, DEWA, and Saudi Electricity Company requirements
LVRT
Low Voltage Ride-Through
Continuous operation during voltage dips to 0% for up to 150ms per grid code requirements
HVRT
High Voltage Ride-Through
Ride-through capability for voltage excursions up to 130% of nominal for defined durations
FRT
Frequency Ride-Through
Operation across 47.5–51.5 Hz frequency range with configurable response curves
FSM
Frequency Sensitive Mode
Automatic active power reduction/increase proportional to frequency deviation
LFSM-O
Limited Frequency Sensitive Mode — Overfrequency
Droop-based power reduction when frequency exceeds threshold
Q(U)
Reactive Power vs Voltage
Automatic reactive power injection/absorption based on local voltage measurement
PF Control
Power Factor Control
Maintain target power factor at point of connection with ±0.95 to unity range
ROCOF
Rate of Change of Frequency
Fast response to ROCOF events with configurable thresholds and response times
PPC Architecture
Four-layer architecture from grid interface to IEC 61131-3 code generation
Layer 1: Grid Interface Layer
Measurement and metering at POC
Grid code compliance monitoring
Protection relay interface (IEC 61850)
Fault recording and disturbance analysis
Layer 2: Control Core
Active power regulation (P setpoint)
Reactive power/voltage regulation (Q/V)
Ramp rate limiting (MW/min)
Curtailment management and logging
Layer 3: Asset Dispatch Layer
Inverter-level power dispatch
BESS charge/discharge coordination
Tracker and auxiliary control
Availability and de-rating management
Layer 4: IEC 61131-3 Code Engine
Auto-generated Structured Text (ST)
Function Block Diagram (FBD) export
SIL 2 safety-rated logic
Version control and audit trail