Modeling of the Power Consumption of Controlled Load

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Dr. Raisz Dávid Márk
Department of Electric Power Engineering

The usage of centrally controlled appliances has a long tradition in Hungary. For domestic customers the control system means an easy way to reduce energy costs. Moreover for DSOs this system provides an effective instrument for power management.

The most common controlled appliance is the electric storage water heater. The power consumption of these appliances is being measured separately. Within each district the load is being controlled in organized groups. In order to determine the power consumption in a given group with regard to the switching schedule, the modelling of the warming-cooling period of the thermostatically controlled appliance is needed.

This thesis has two main goals. On the one hand it is aiming to demonstrate the used information channels and modulation types. On the other hand it wishes to introduce a model - developed by the author – which simulates the power consumption of the controlled load.

The model can be applied to domestic hot water heaters, and as such incorporates a hot water extraction function. Among the set requirements is the easy usage, the quick execution and the reduced number of input parameters. As a solution a state queue has been defined, on which the temperature of the hot water heaters can be projected. The heating or the cooling off causes a discrete number of steps on the queue. This function has been realized in the form of an object-oriented source code.

The completed simulation might be of interest for Hungarian DSOs, since it can help differentiate between controlled and uncontrolled load. Furthermore it can contribute to the optimal definition of the controlled groups.


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