Load Frequency Control

The continuous operation of electric power systems requires system operators to constantly balance the energy demanded by consumers. Changes in demand and/or supply can be observed by measuring the system’s frequency. Its desired value is 60 Hz and any changes and increased demand will result in a frequency below 60 Hz and a decreased demand in a frequency above 60 Hz. It is the system operator’s job to “balance” the system by keeping the system’s frequency as close as possible to 60 Hz. This balancing process is known as Load Frequency Control.

In the displayed simulation setting below you get the chance to be a system operator yourself. Change the customer’s demand – the load, and try to bring back the system frequency to its desired value of 60 Hz either manually or by activating the automatic control as used by system operators.

The load frequency simulation module has been developed in co-operation with the Center for Educational Technologies (CET) at Wheeling Jesuit University.