The goal of this lesson is to familiarize you with the various ways of modeling loads in GridLAB-D. The specific learning objectives are the following
- How to modify an existing static load.
- How to add static loads of different types.
- How to remove a static load.
- How to create new load objects.
Loads can be either static (i.e., constant power, current, and/or impedance). The load composition can be specified in a variety of way including (1) the real and reactive parts, (2) the magnitudes and angles by phase, and (3) the total load and fractions by phase with the power factors. In addition, loads can be specified as 3-phase in delta or wye configuration, or as triplex loads on a split phase.
The following tasks are illustrated in main.glm
:
- Modify existing static loads
- Change constant power load on phase A of
load_1
to 48 kW real power and 24 VAr reactive power (Seemain.glm@6
). - Add constant impedance load to phase B of
load_2
at 100 Ohm resistance and 10 Ohm reactance (Seemain.glm@9
). - Remove constant power load on phase C of
load_4
by setting it to 0+0j complex power (Seemain.glm@12
).
- Change constant power load on phase A of
- Create new static loads
- Add
load_115
toload_114
throughline_114to115
(Seemain.glm@15
). Copy the load fromload_114
. - Connect
load_116
directly toload_115
(Seemain.glm@34
). Double the load fromload_114
.
- Add
- Change the constant power load on
load_116
to an equivalent constant current load. (Hint: theconstant_current = constant_power / nominal_voltage
.)