Secondary factors

Manual -> Energy Management System (EMS) -> Method of the EMS -> Operating principle of the obtaining rule -> Output determination for the devices -> Secondary factors
Previous chapterNext chapter Show allShow all    Hide allHide all

Lock times and release times of the devices

With the help of the lock times you can control during which times the components are not available for the optimization. The times which are not designated as lock times represent the release times.

attention Attention

During the lock times the components are not influenced by the optimization - or only in the released direction. Thus the components remain in the state they had reached at the end of the release time.

Minimum and maximum switching times

You can specify the minimum and maximum time for the single switch states (on/off) for each used device and generator. The time indicates what time period must have elapse at least in order to trigger a switching in the opposite direction.

This parameter is important for aggregates because in order to avoid thermal damages and damages caused by soot they must not be switched off right after they were switched on. Thus for example a certain amount of time must have passed after the heating groups had been activated before they switch on.

Switching rates

If devices and generators can only be switched a limited number of times in a certain time period, the components are no longer switched when this number is exceeded. Beside the number of switchings a time period must also be defined in order to carry out the parameterization.

Example Example

Maximum 25 switchings in 12 hours

Switching priorities

The switching of the components is planned in accordance with a priority schedule. At that switch-on and switch-off priorities are listed separately. The user can determine the priorities in accordance with the operation requirements. The component with the highest priority (highest numerical value) is switched first.

If the requirement is to switch the components in a sorted order by switching off the device last which was switch on first, a number pattern must be applied to all components: ascending for first switch-on and descending for last switch-off.

info Info

If several devices have the same priority in one plant, the EMS automatically ensures that on average all devices of the same level are switched equally often.