| Summary: |
The purpose of this work is to enable an increase in renewable and efficient energy generation capacity onto the distribution network with no additional costs for the power system. In order to increase the amount of generation as well as some ancillary services delivered, Distributed Generations (DGs) will cooperate with each other. This cooperative association will increase the DGs profits.
EU and Portuguese governments have set a target for the amount of energy that must be generated from renewable and efficient energy sources. A large amount of generation is expected to be connected onto the electricity distribution networks in order to meet this target. However, technical and economic challenges still need to be overcome to further increase the capacity of DG onto the distribution networks with no additional costs.
The aim of this work is to demonstrate the possible feasibility of cooperative control among the renewable and efficient energy sources to cooperate with each other. So that, it will be research the development of a multi-level cooperative control framework encompassing renewable and efficient energy resources on a market environment.
An critical component of this effort consists in the analysis of a selected national context (e.g. subsystem) having in mind to extract realistic models and operational requirements. These results will yield models and performance functions of the various agents, models for cooperation, the specification of the cooperative control architecture, sets of decision-making rules and algorithms.
The research of this study will employ a multi-level hierarchical control scheme (or architecture). The multi-level hierarchical control scheme can be defined with priority of actions and rights of interventions, with a cooperative objective between those renewable and efficient energy sources in order to increase their revenue as the same time that the energy delivered to customers are reliable, secure and better quality.
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Summary
The purpose of this work is to enable an increase in renewable and efficient energy generation capacity onto the distribution network with no additional costs for the power system. In order to increase the amount of generation as well as some ancillary services delivered, Distributed Generations (DGs) will cooperate with each other. This cooperative association will increase the DGs profits.
EU and Portuguese governments have set a target for the amount of energy that must be generated from renewable and efficient energy sources. A large amount of generation is expected to be connected onto the electricity distribution networks in order to meet this target. However, technical and economic challenges still need to be overcome to further increase the capacity of DG onto the distribution networks with no additional costs.
The aim of this work is to demonstrate the possible feasibility of cooperative control among the renewable and efficient energy sources to cooperate with each other. So that, it will be research the development of a multi-level cooperative control framework encompassing renewable and efficient energy resources on a market environment.
An critical component of this effort consists in the analysis of a selected national context (e.g. subsystem) having in mind to extract realistic models and operational requirements. These results will yield models and performance functions of the various agents, models for cooperation, the specification of the cooperative control architecture, sets of decision-making rules and algorithms.
The research of this study will employ a multi-level hierarchical control scheme (or architecture). The multi-level hierarchical control scheme can be defined with priority of actions and rights of interventions, with a cooperative objective between those renewable and efficient energy sources in order to increase their revenue as the same time that the energy delivered to customers are reliable, secure and better quality.
The distribution network will be sub-divided into a certain number of areas. These areas must be able to provide certain ancillary services to the network or at least do not required any extra ancillary services from the transmission network through the DGs cooperative association. The ancillary services provided by the cooperative DGs can therefore increase the reliability, security and quality of the power system. Thus, distribution network may reduce their additional costs with the increase of the amount of intermittent and unpredictably source of energy onto their networks.
The algorithm developed will operate on a real-time decentralised control basis. This optimisation objective will be a multi-variable control problem, which could be solved by on-line constraint optimisation. However, optimisation is dependent on the network configuration, real-time data information from the distribution network, real-time measurements and market contracts and on-line deals. The developed algorithm will maximise the distribution generations' profits on the control based-area, however there may be a compromise between the maximum energy sale and some of the ancillary services which may be provide to the network.
The controller software will have a control-scheduling block, which is used to calculate a new set of control set-points for the devices under the control scheduling. There will also be an input of contracts that comprises the details of ancillary services contracts between the DGs and distribution network.
The optimisation algorithm will be simulated and validated using in a Portuguese distribution network under a normal network operation. The technical feasibility and potential benefits of the algorithm will be demonstrated.
The work here developed will give the background for a future technical and commercial development of a Centre of Dispatch and Control for DGs based on cooperative association of the renewable and efficient source of energy. |