def calc_cycle_energy_forced_year(timestep, array_cycle_flex_forced):
    """
    Calculate cycle energy flexibility for whole year (with forced operation)

    Parameters
    ----------
    timestep : int
        Timestep in seconds
    array_cycle_flex_forced : np.array
        Array holding cycle flexibility power values in Watt for each
        timestep (forced operation)

    Returns
    -------
    energy_flex_forced : float
        Maximum annual energy flexibility (in kWh) for forced operation
    """

    return sum(array_cycle_flex_forced) * timestep / 3600000