Frequency Response and Statutory Bands
df/dt = (f0 / 2Heff) [Pimb - Deff (Δf / f0)]
Tracks statutory frequency limits, RoCoF, nadir, and the return toward nominal frequency.
Frequency Stability and Resilience
Loading scenario
RUNNING
Operating Status and Protection Thresholds
The overall case status prioritises frequency containment and recovery. Voltage operability and energy reserve are also tracked as separate constraint layers, so one weak metric can flag operability stress without automatically meaning a full frequency blackout.
Power Balance and Services
Pimb = generation + services + imports - demand - disturbance
Shows how each service term offsets the disturbance and how protection actions change the net balance through time.
State of Charge and Voltage Resilience
Tracks battery energy against the reserve floor and the system-strength voltage proxy against its warning band, using separate axes for clarity.
Live Causal Diagram
Large live cards for the selected instant. Click a main time-series plot, or use the sticky playback bar, to follow the chain from imbalance to frequency and protection response.
Weather and Renewable Mix
Shows how the selected weather narrative redistributes the chosen renewable block between wind and solar in the locked operating point.
Protection Actions and Cascade Losses
Shows triggered automatic protections such as LFDD or emergency relief, and separately shows any adverse follow-on disturbance losses. If none trigger, the panel stays quiet.
Dynamic Security Margins
Each core security metric is plotted in its own physical unit with secure, stressed, emergency, and blackout bands. Threshold values are listed under each panel so the trace stays readable.
Frequency Margin
Frequency in Hz against the secure band above 49.5 Hz and the emergency floor at 48.8 Hz.
Blackout 48.6Emergency 48.8Secure 49.5+
RoCoF Margin
Absolute RoCoF in Hz/s against the planning band at 0.25, the stressed band at 0.50, and trip risk beyond 1.00.
Planning 0.25Stressed 0.50Trip 1.00
Voltage Operability
Voltage proxy in pu, showing weak-grid warning below 0.95 pu and hard operability stress below 0.92 pu.
Emergency 0.92Weak 0.95Healthy >0.95
Energy Reserve
Battery state of charge in percent, read against the healthy reserve band above 20% and the reserve floor at 10%.
Emergency 10%Healthy 20%Reserve >20%
Operating Map
This map re-simulates the locked service fleet across renewable share and disturbance size using the current disturbance type. The exact locked case is inserted into the sweep axes, so the highlighted cell matches the same case shown in the main plots and thresholds.
Sensitivity Tornado
The centre line is the locked base case. The left bar tests a lower setting and the right bar tests a higher setting; green lifts the nadir, while red deepens it and weakens the margin.
Control Room Briefing
Short operator notes on what happened in this locked run: frequency behaviour, power and energy balance, voltage operability, protection response, and resilience outcome.
Dynamic Relationships
Explains why the locked case behaves the way it does by linking the governing equations to the active services, Voltage Proxy, Battery Power and Energy, and protection actions. This section complements the Control Room Briefing by focusing on the cause-and-effect relationships behind the result.