Abstract
A microgrid is composed of distributed power generation systems (DGs), distributed energy storage devices (DSs), and loads. To maintain a specific frequency in the islanded mode as an important requirement, the control of DGs’ output and charge action of DSs are used in supply surplus conditions and load-shedding and discharge action of DSs are used in supply shortage conditions. Recently, multiagent systems for autonomous microgrid operation have been studied. Especially, load-shedding, which is intentional reduction of electricity use, is a critical problem in islanded microgrid operation based on the multiagent system. Therefore, effective schemes for load-shedding are required. Meanwhile, the bankruptcy problem deals with dividing short resources among multiple agents. In order to solve the bankruptcy problem, division rules, such as the constrained equal awards rule (CEA), the constrained equal losses rule (CEL), and the random arrival rule (RA), have been used. In this paper, we approach load-shedding as a bankruptcy problem. We compare load-shedding results by above-mentioned rules in islanded microgrid operation based on wireless sensor network (WSN) as the communication link for an agent’s interactions.
Highlights
The microgrid, which is an eco-friendly small-scale power grid, is expected to be introduced into power grids in the near future
Since the microgrid is composed of small-scale power systems and devices, autonomic and autonomous microgrids based on the multiagent system have been studied for their economical and efficient operation and control [3,4,5,6]
We compare the feature of load-shedding based on the constrained equal awards rule (CEA), the constrained equal losses rule (CEL), and the RA
Summary
The microgrid, which is an eco-friendly small-scale power grid, is expected to be introduced into power grids in the near future. The main energy sources of the microgrid are composed of solar and wind power facilities, micro-turbines and fuel cell-based combined heat and power (CHP). The use of these energy sources have been encouraged in many counties because as clean energy sources they have a close relationship with Climate Change. Since the microgrid is composed of small-scale power systems and devices, autonomic and autonomous microgrids based on the multiagent system have been studied for their economical and efficient operation and control [3,4,5,6]. The multiagent system is a society or system composed of multiple artificial agents. The agent is able to control and to operate adaptively and autonomously his/her local system according to the intension of design purpose after sensing environment changes like a human operator
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