.AixLib.Controls.HVACAgentBasedControl.Agents.ColdProducerAgent

Information

Overview

• This model is a producer agent which controls a cold producing device.
• It is based on communication via UDP and logic implemented with the help of the StateGraph Modelica library.
• It is used together with a broker-agent and at least one producer-agent.
• It requires a CostFunction component to compute a proposal.

Concept

The cold producer agent recives a call for proposal from the broker with a requested capacity adjustment. It makes a proposal with the help of a Cost function for the adjustment and sends it back to the broker. If the proposal is accepted, the agent confirms the adjustment and adjusts the capacity of the controlled device accordingly. The logic is implemented with the help of the StateGraph library. Communication is realized with the help of the DeviceDriver library and follows the language standards for multi-agent-systems set by the FIPA to the highest possible extend for Modelica models. The following figure shows the behaviour of the consumer agent. For further information please refer to the first reference.

References

• Roozbeh Sangi, Felix Bünning, Johannes Fütterer, Dirk Müller. A Platform for the Agent-based Control of HVAC Systems. Modelica Conference, 2017, Prague, Czech Republic.
• FIPA ACL Message Structure Specification
• FIPA Communicative Act Library Specification
• Felix Bünning, Roozbeh Sangi, Dirk Müller. A Modelica library for agent-based control of building HVAC systems. Applied Energy, 193:52-59, 2017.

Example Results

• Simple Heating System

Revisions

• December 2016, by Roozbeh Sangi:
  revised
• December 2016, by Felix Bünning: Changed some variables to Integer type in order to avoid warnings caused by using the "==" operator
• November 2016, by Felix Bünning: Implemented variable minimum load
• October 2015, by Felix Bünning: Developed and implemented