Your frequency bias is -100 MW / .1Hz. If the system frequency is 59.95, how much is your balancing authority contributing to the interconnection?

To understand the contribution of the balancing authority to the interconnection based on the frequency bias and the system frequency, we start by analyzing the given data.

The frequency bias indicates how much power (in megawatts) the system is expected to provide for a change in frequency (in hertz). In this case, a bias of -100 MW per 0.1 Hz means that for every 0.1 Hz decrease in frequency, the balancing authority will provide 100 MW to the interconnection to stabilize it.

The system is operating at a frequency of 59.95 Hz, which is 0.05 Hz below the nominal frequency of 60 Hz. To determine the deviation from the nominal frequency, we calculate the frequency difference as follows:

60 Hz - 59.95 Hz = 0.05 Hz

Next, we convert this deviation into how much power the balancing authority should contribute. Since the bias indicates a contribution of 100 MW for every 0.1 Hz, we can proportionally translate this for a frequency decrease of 0.05 Hz. This can be calculated by taking half of the contribution for a full 0.1 Hz drop:

100 MW * (0.05 Hz / 0.1