Short-term Operational Planning Problem of the Multiple-Energy Carrier Hybrid AC/DC Microgrids

Abstract

In this paper, the short-term operation problem for a multiple energy carrier hybrid AC/DC microgrid is discussed. The hybrid microgrid consists of AC and DC parts, which are connected by means of inverters as well as natural gas network. The microgrid includes photovoltaic (PV) unit, wind turbine (WT), battery storage unit and gas-fired microturbines. A mixed integer linear programming is formed to minimize the overall cost of the microgrid including cost of natural gas supply, the value of lost load and battery degradation cost. The presented case study explored the importance of inverter characteristics and pipeline capacity.Index Terms-hybrid AC/DC microgrid, natural gas network, multiple-energy carrier, battery degradation NOMENCLATURE Variables E Available energy of battery storage unit f, π, v Natural gas flow/pressure/supplier output P, Q Active/Reactive power dispatch P L, QL, SL Active/Reactive/Apparent power of line V, θ Voltage magnitude and angle Indices c Inverter ch, dc Charge/Discharge of the battery d Demand served F Forecast value of renewable unit output g, gs Microturbine/Supplier j, o, m, n Energy hub k Battery unit p Natural gas pipe s, w Solar/Wind turbine unit t Time

Coordinated Scheduling of Electric Vehicles Within Zero Carbon Emission Hybrid AC/DC Microgrids

“…However, DC power has some benefits such as smaller loss, a higher level of reliability, and less technical challenges in terms of frequency and voltage regulation [6]. In this work, a hybrid AC/DC microgrid is considered to benefit from DC perks [7], [8].…”