kitControl-ShedControl

ShedControl receives inputs from a primary (network) EDL source and a local (secondary) EDL source (separate ElectricalDemandLimit objects) that specify the number of load levels that should be shed. The Secondary Shed Level is used as a backup whenever the Primary Shed Level is not available.

ShedControl has StatusBoolean outputs for up to 16 contiguous levels, as specified in the Number Levels property. A Status slot provides an output message to indicate this component’s state in reference to the overall demand limiting control scheme. Execution of this component can be enabled or disabled by setting the Shed Enable property.

ShedControl is available in the Energy folder of the kitControl palette, along with related objects.

Following is a description of the ShedControl component properties:

Primary Shed Level

This is an input that allows you to link in a Shed Level property value from an EDL component. Typically this would be a component on the network.
Secondary Shed Level

This is an input that allows you to link in a Shed Level property value from a secondary (or “backup” EDL component. Typically this would be an EDL component with a locally available connection. The Secondary Shed level is used only if the Primary Shed Level property is not available.
out(1-16)

These 16 properties have binary status values that reflect the current active Shed Level. For example, a Shed Level of 3 (as indicated by the Primary Shed Level, or Secondary Shed Level when Primary is not available) sets the first three out properties (out1, out2, out3) to false. This false value may be used to turn off power by linking to an appropriate control. When a “restore” changes the Shed Level to 2, the out3 property returns to null, relinquishing control to the next (out2) priority level.

Figure 46 shows an example wiresheet view of a ShedControl component in use.

Figure 46. Wiresheet view of Shed Control component

Note the following about the example wiresheet view:

The Primary Shed Level (linked from an EDL component) is “1” (no Secondary Shed Level is used).
out1, 2, and 3 are linked to boolean controls that are set to turn off power to Plant_A, B, and C, respectively, if required.
The current Shed Level of “1” sets out1 to false and sets the “Plant_A” boolean control status to False. This should turn off power to any power consuming devices that are linked to this object.
The out1 value is also linked to the SetpointLoadShed component, which adjusts a setpoint to reduce the electrical demand.
If more shed levels are needed, out2 and out3 will be set to false. If shed levels are no longer needed (a “restoration” is invoked) then out3, out2, and out1 are restored (to null), in that order, as allowed by the current Shed Level.