### Control Tools

#### Preventive Load Shedding Control *More*

PLSC decreases load within the control region of the load pocket to obtain a dynamic approximation solution for a non-solving contingency by increasing the reactive reserves to a sufficient level for the contingency so that the solution is found. Conventional P-V and V-Q methods do not define loadpockets correctly and thus can not predict control regions or problematic subnetworks which make them incapable of predicting the control region used in Preventive Load Shedding Control.

*More*#### Preventive Voltage Rescheduling *More*

PVR adjusts voltage on generators within the control region of the load pocket to obtain a dynamic approximation solution by increasing the reactive reserves to a sufficient level for the contingency so that the solution is found. Conventional P-V and V-Q methods do not define loadpockets correctly which make them incapable of predicting the control region used in Preventive Voltage Rescheduling Control.

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