Abstract
One of the most critical challenges for modern power systems is to reliably supply electricity to its consumers during and in the aftermath of natural disasters. As our dependence on electrical power has increased over the years, long-term power outages can lead to devastating impacts on affected communities. Furthermore, power outages can halt the operation of water treatment plants, leading to shortages in clean water, which is essential during post-disaster recovery. One way to address this is to temporarily reconfigure power and water networks into localized networks, i.e., electric microgrids and water micro-nets, that utilize local resources to supply local demand independently of the main power grid and/or water network. Utilizing distributed energy resources such as wind and solar and treating wastewater locally for potable reuse can provide the operational flexibility for such systems to operate sustainably. However, due to uncertainties in both renewable energy generation and electric/water consumption, ensuring sustainable operation is a challenging task. In this paper, an optimal operational strategy is proposed for an islanded microgrid/micro-net, considering the stochastic nature of renewable energy resources, electric demand, and water demand. An energy storage system is modeled to address the uncertainty in power generation and demand, in conjunction with local water storage and wastewater treatment to accommodate variable water demands. A two-stage stochastic programming model is formulated and solved to determine an optimal operation strategy for the combined system.
Highlights
The electric power grid has evolved from historical one-way power networks where a single generation unit served a small number of predictable loads, to modern-day power systems, which form the largest running machine ever built by humans, spanning thousands of miles and connecting millions of components [1,2]
The contributions of the paper can be outlined as below: (1) numerous papers in the literature have addressed the problem of optimal control and energy dispatch of electric microgrids, this paper focuses on the co-optimization model, where both power, water, and wastewater networks are considered, along with interconnections between the three; this aspect is less explored in the literature
It is assumed that the community has been disconnected from the main power grid and the water distribution network due to a large disturbance such as a natural disaster and is expected to operate in a standalone mode
Summary
The electric power grid has evolved from historical one-way power networks where a single generation unit served a small number of predictable loads, to modern-day power systems, which form the largest running machine ever built by humans, spanning thousands of miles and connecting millions of components [1,2]. As the concept of microgrids and micro-nets are critical to maintain the resiliency of energy and water systems, many researchers have discussed how future communities should be designed and planned so that individual neighborhoods can be better prepared for potential disturbances to the system [22,23]. Operating such a system requires simultaneous management of both energy and water resources.
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