What role does a power plant controller perform in a fault (VRT) conditions?
When the Power Plant Controller (PPC) detects a grid-level fault (VRT) it freezes its control loops and stops communicating with the inverters.
During this time inverters operate autonomously to keep the grid stable.
The impacted inverters send a VRT signal to the PPC in the case of a VRT malfunction within the plant. These inverters momentarily lose control.
In a partial VRT state the PPC retains control over the remaining healthy inverters.
Following the fault’s correction the PPC acquires control of all inverters & resumes regular operation.
One of the PPC’s key objectives is to ensure plant reliability & grid compliance in fault conditions.
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