Abstract
This paper proposes a home energy management model called GEDE, outlined in the Colombian Law 1715/2014 [1], taking into account the considerations proposed in chapters II and III related to electricity production with non-conventional energy sources, efficient energy management as well as incentives to invest in this kind of projects. Different operation ways that can be applied in the proposed residential energy system are presented. The system has a variable topology, so this is feed by distributed generation sources or by the interconnected system and they are related to a control system that allows the incorporation of bi-directional metering to establish the electric flow as well as its protections. Three scenarios were analyzed; the first one corresponds to work with distributed generation during peak hours and the user manually activates the system; the second one consists in selecting the critical loads, which keep connected to the distribution system while the use of the other loads is postponed until next hour, thus this scenario is semiautomatic. In the third scenario the system saves energy in an autonomous way through intelligent infrastructure controlling the appliances and lighting utilization. This proposal allows providing new energy consumption patterns through mechanisms that make a significant contribution to the efficient energy by utilizing monitoring, control and supervision techniques together with distributed generation.
Highlights
In May 2014, the Colombian Congress issued Law 1715, which regulates the integration of non-conventional renewable energy to the national energy system with the intention to promote efficient energy management through taxation mechanisms, cooperation arrangements, and investment incentives
For this paper a prototype was developed where the system counts on the energy provision coming from the distributed generation, which is supported in the Article 8 of Law 1715 by means of one of the mechanisms for the promotion of small scale self-generation
It is connected to a control system that has the following components: an electromechanical relay for the commutation of the supply source, a protection set in case of short circuit, the load and the manual switch that allows to make the change of supply source
Summary
The modernization of the electric energy value chain (generation, transmission, distribution, and end user) [2], is a new scenario where energy sources coming from Distributed Generation (DG, non-conventional renewable sources) and from the interconnected system are integrated. This model involves Renewable Energy Sources (RES), which are part of the electric system by means of self- generation for self-consumption or delivering energy surpluses to the distribution system, bi-directional measurement systems, and simplified connection mechanisms. The model has two servers: the “management server” that manages the electrical variables to be monitored, controlled, and supervised by the active user in a centralized or remote way having the registered signals in a database; and the “local server for GEDE,” which determines or establishes the way in which the energy transfer between sources and loads must be done according to an algorithm. Decisions are made by the user or the system according to different alternatives: manual, automatic, or semiautomatic
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