Abstract
The study presented in this paper aims to show the impact of introducing a priority-based internal power flow management system on the local energy market of prosumers with solar panels, fuels cells and batteries. The community used for the study is based on the Open Energy Systems (OES), in which 19 autonomous subsystems, equipped with batteries, solar panels and AC grid connection are interconnected via a DC power bus. For the simulation purposes, fuel cell, modeled after Ene-Farm, is added to the original configuration. Each standalone system has internal, priority-based, agent, capable of scheduling the operating hours of the fuels cell to maximize the utilization of the generation and minimize curtailment. The energy market is based on a simplified version of the Zaraba, a continuous double auction algorithm used by the Japanese Stock Exchange, in which prosumer can submit a bid for a future timeslot. The preliminary numerical evaluation is based on the results from several simulations using different versions of the internal management system.
Highlights
This paper is an extension of the work titled “Energy exchange strategy for local energy markets with heterogeneous renewable sources”, originally presented in the 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 Industrial and Commercial Power Systems [1] in Palermo, Italy.In recent years, the dropping prices for energy storage and Feed-In Tariffs (FIT) [2] has led to widespread adoption of solar energy and has opened up possibilities for prosumers to play an active role in the energy markets
All losses, including conversion and transmission losses, are neglected; Each subsystem has a battery, use for absorbing the network imbalances; It is assumed that the data, provided by the power meters and the controllers, can be trusted; The DC line capacity, in this case 2.5 kw, is the same for all subsystems; Due to the location of the study, Japanese yen is chosen as main currency for the financial transactions; The utility grid is not use for charging the battery; There is no Feed-in to the utility grid
The external strategy represents the software implementation of the proposed electricity market. It uses simplified version of the Zaraba method, a continuous double auction algorithm used by the Japanese Stock Exchange to match existing bids, to manage agreed deals and to monitor financial transactions
Summary
This paper is an extension of the work titled “Energy exchange strategy for local energy markets with heterogeneous renewable sources”, originally presented in the 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 Industrial and Commercial Power Systems [1] in Palermo, Italy.In recent years, the dropping prices for energy storage and Feed-In Tariffs (FIT) [2] has led to widespread adoption of solar energy and has opened up possibilities for prosumers to play an active role in the energy markets. This paper is an extension of the work titled “Energy exchange strategy for local energy markets with heterogeneous renewable sources”, originally presented in the 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 Industrial and Commercial Power Systems [1] in Palermo, Italy. The current nature of both the grid infrastructure and the electricity markets is preventing residential customers from participating in the said markets and from taking full advantage of cheaper renewables. This calls for a new approach to market design that reflects both the locality of the energy exchange and the increased heterogeneity of the microgrids as well as for the development of more prosumer oriented exchange strategies.
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