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Under Frequency Load shedding

thread1630-498418

Under Frequency Load shedding

Under Frequency Load shedding

(OP)
Hi I have a question regarding load shedding in power systems, why do most load shedding use frequency as a parameter? Frequency changes due to load unbalance, so why not use load parameters for load shedding determination?

RE: Under Frequency Load shedding

Load shedding uses multiple parameters, of which frequency is one. As Greg mentioned, actual load values are few and far between when initially setting up a load shed scheme. However, certain large-scale (% of max load) changes are known to disrupt system stability and can thus be coded into the scheme from the outset (for example, a 50% step in total load vs current spinning reserve). Smaller changes will cause frequency perturbations that can be picked up through normal system monitoring.

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