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.
A microgrid may be supplied from inertial (rotating type) and non-inertial (converter-interfaced) distributed generators (DGs). However the dynamic response of these two types of DGs is different. Inertial DGs have a slower response due to their governor characteristics while non-inertial DGs have the ability to respond very quickly. The focus of this paper is to propose better controls using droop...
Wind turbines are rapidly increasing and some times are disconnected from the grid intentionally or inadvertently and continue to supply local loads. If it was decided to reconnect to the grid, some problems may happen. This paper deals with the reconnection of islanded wind turbines to the grid and proposes a new method to reduce the high current effects of reconnection. The new method is simple...
An intentional islanding operation or a planned islanding operation is feasible with the advance technologies introduced by a smart distribution system. This paper highlights a well planned islanding operation facilitating with an intelligent control strategy for a Distributed Generation (DG) to operate islanded and cater the issue of different islanding area. For radial system network, the DG could...
At present time, wide penetration of distributed generators is limited, among other factors, by improper behaviour of interfaces: sometimes they disconnect the generator when a simple voltage dip occurs or, even worse, they continue functioning in case of network outage (unintentional islanding). A communication between substation and diffuse generators may overcome these problems. This paper explores...
In event of fault in distribution system with distributed generators, in order to enhance service reliability, the DGs should be used as main power source for blackout area. Deeply considering the characteristic in the service restoration process and the type of switches, the model based on CSP is proposed to solve the on-line islanding operation problem in the event of a blackout in a power distribution...
The continuity of power supply can be improved by power system islanding. A possible solution, synchronous islanded operation, enables the islanded system to remain in phase with the main power system while not electrically connected, and so avoids out-of-synchronism re-closure. Specific consideration is required for the multiple-set scenario, and is the topic of this paper. A suitable island management...
The paper studies distribution network with comprehensive micro-grid systems with an aim to design an advanced protection and control scheme. The proposed integrated protection and control (IPC) unit, interfacing to the substation measurement devices and micro-grid components through a substation optical Ethernet, is responsible for the protection of the distribution substation and control of its...
The contribution of embedded generation to the connected capacity of the power system is increasing. In order to make best use of this resource, splitting the distribution network, also known as islanding, is being considered by some utilities. Operating the island in synchronism with the main network is preferred as this prevents out of phase reconnection of the island. This paper examines the technical...
The DC micro grid has been used for power distribution in recent years. The wind turbine is one of the most comprehensively used power source in this kind of grid. It is connected to the DC grid by the AC/DC converter. In this paper, converter design methods are proposed for four types of wind turbine systems, the variable speed induction generation system, the fixed speed induction generation system,...
At present, islanding detection is one of the important research orientations in the area of distributed generation (DG). There exist currently in the literature several methods for islanding detection in the case of single distributed generator connected to a utility grid. These methods are classified as active, passive and methods installed on the utility. However, these methods have limitations...
A grid connected power generation systems based on the superior controllers of an active and reactive power are useless during a grid failures like grid short-circuit or line braking. Therefore the change of operation mode from grid connection to stand alone allows for uninterruptible supply of a selected part of grid connected load. However, in the stand alone operation mode the superior controllers...
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.