The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Microgrids are proving themselves viable to address the need for more reliable renewable power systems. They can improve the resilience of the overall system in case of abnormal conditions. The city of Spokane in Washington, is considering establishing a microgrid using existing transmission and distribution infrastructure. This microgrid will be supplied solely from the existing hydroelectric generators...
With the growing demand of electricity, deployment of microgrid is becoming an attractive option to meet the energy demands. However, a grid connected microgrid suffers a crucial stability issues during a fault in utility grid. For stable operation of microgrid during fault in grid, islanding operation is generally adapted. In this paper transient stability of the microgrid is analyzed during fault...
RSE's Distributed Energy Resources Test Facility has been included as active user in A2A Lambrate Smart Grid Project. The Test Facility control system makes possible to manage the various generation systems available, behaving as a unique controllable unit by the DSO. This activity allowed to test functions such as active and reactive power control, remote disconnection and fault detection, as well...
The current energy trend is the hybrid system projection in which renewable sources and storage systems provide a high percentage of energy needs, leaving the use of conventional system for emergency cases. Hence, microgrids represent a viable solution for the electricity demands in isolated or non-electrified areas. Only diesel generators were previously used in this kind of applications. Their efficiency...
A Microgrid is assumed to be a cluster of distributed generations operating as a single controllable system to provide reliable power to its local area. Integration and control of large number of sources in a Microgrid is not possible with normal P-Q controls. Microgrid requires algorithm capable of handling various control modes such as PQ, PV and Droop control. A new formulation is required to provide...
Conventional power system is one of the most complex, based on fossil fuels, having matured operation and control technology while micro grid is simple, environment friendly, based on distributed energy resources, emerging as new power system can be operated in islanded as well as grid connected modes. Though the researchers have suggested many control strategy such as master/slave, current/power...
In this paper, an attempt has been made to introduce a new control strategy including Plug-in Hybrid Electric Vehicle (PHEV) and Diesel engine generator to control the voltage and frequency of autonomous microgrids. The proposed control strategy has multiple advantages over the recent control methods in microgrids. The proposed method applies the primary and secondary frequency control strategy, simultaneously...
This paper proposes an online optimal power management problem for microgrid energy market considering electric vehicle (EV) charging/discharging, load curtailment and grid power transactions. Fuel and emission costs of conventional sources, hourly profits, incentives for load curtailment, revenue/cost of grid power trade and charging/discharging price of electric vehicles (EV) are considered by the...
This paper describes the methodology that is used to optimize a rural microgrid operation, through a local energy management system. The proposed microgrid corresponds to a medium voltage microgrid located in Catalonia. The microgrid is composed by four secondary substations, with photovoltaics generation, an emergency diesel generator and two battery energy storage system. In the proposed problem...
As a type of Cyber-Physical Systems (CPSs), Smart Grid has been adding more communication and control capabilities to improve power efficiency and availability. Especially, more and more distributed control algorithms have been developed for Smart Grids because of their flexibility and robustness. In order to deploy them in real electric power systems, distributed control algorithms must be tested,...
The paper presents a microgrid energy management strategy (MEMS) for a Medium-Voltage Isolated microgrid, which is China's 10kv island microgrid demonstration project to accommodate the increasing power needs of customers and solve problems of island power supply. When the SOC is restored in security zone, the energy storage system (ESS) would increase the sensitivity and adjust the maximum charging...
Islanded DC microgrid architecture and control have become popular recently. One of the main control architectures is the DC bus voltage following type, where a main generator controls the DC bus voltage and the others follow the bus voltage and the power commands. Conventionally, the power regulation in the following generators is often employed with the droop control method. The main problem of...
A droop control-based approach of effective power sharing among four parallel inverter-interfaced generators in an islanded microgrid has been proposed in this paper. Droop control strategy is applied during load change in islanded microgrid system in a way that power sharing among all the generators is also equal. This paper describes the small-signal stability analysis method to select the control...
This paper proposes a control strategy for the distributed generation based on isolated system, which consists of diesel generator, photovoltaic (PV)generator and battery. The diesel generator is used being a main energy source, but the photovoltaic generation is chosen as an additional power source due to the growth of the load demand and for establishing an isolated microgrid. The control of microgrid...
In this paper, integration of solar panel based renewable energy distributed generation (DG) with conventional diesel-engine generator in a microgrid has been studied in both grid-connected and islanded modes. Besides solar energy based DG and diesel generator, a grid-forming and a grid-supporting distributed generators are also included in the microgrid. The grid-forming DG adopts constant frequency...
This paper proposes an energy management system designed to control the power flow in a hybrid microgrid composed of a 1 kWp PV array, a 1.2 kWp wind turbine, a 1.2 kW fuel cell and a 31.5 F / 250 V supercapacitor bank. The microgrid provides uninterrupted power supply of critical dc loads and it can operate in both, standalone or grid-connected modes. A power flow control strategy is proposed to...
This paper presents the application of a mathematical algorithm based on the gradient method [1] to solve optimal power flows (OPF) in electrical microgrids with photovoltaic generation in order to improve the voltages profiles and consequently reduce the active power losses. The generation and storages devices were modeling by dynamic curves and the algorithm was implemented in a two electrical microgrids...
In this paper an optimization algorithm is applied on a microgrid with renewable energy and distributed generation. The intermittent electricity in Lebanon leads to widely use diesel generator groups and to install renewable energy in private places in order to cover the consumption during the power cut. The proposed case study consists of three energy hubs integrating renewable energy, diesel engines,...
The distribution power system in ship is very similar to a microgrid and supplies energy to navigation and operation system as well as sophisticated systems of weapons and communications. After a fault is encountered, reconfiguration refers to changing the topology of the microgrid distribution network in order to isolate system damage and/or optimize certain characteristics of the system. Reconfiguration...
Microgrid is a single controllable unit constituting distributed generation (DG) and load in the power system. The micro source includes photovoltaic (PV) cells, wind turbine, micro turbine, fuel cell, electric accumulator and flywheel etc. Usually, the micro source operates in parallel with the normal distributed network that uses the power electronic devices. There are two typical operation modes...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.