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.
Existing techniques exploiting local measurements to calculate the long-term voltage stability mostly rely on Thevenin equivalent concept. This notion calls for two or more distinct measurement sets for computation of Thevenin parameters assuming that the power system stays unchanged during the data collection, which is not essentially true. This paper presents a new method for computation of voltage...
Cascaded H-bridge (CHB) multilevel converters with capacitive sources need a voltage balancing algorithm to control their DC voltages. In this paper, a new method is proposed to achieve this goal in a simple manner. The proposed method adds auxiliary signals to the main reference of modulating signals to attain voltage balancing goal. This approach not only is simple and easy to implement, but also...
This paper presents a new configuration of doubly fed induction generator (DFIG)-based wind farm with multilevel cascaded H-bridge (CHB) converter and its control system, which is suitable not only for unbalanced grid voltage conditions, but also for small voltage sags. The proposed configuration of DFIG can balance the point of common coupling (PCC) voltage without needing additional DC link capacitor...
In order to keep the power system equilibrium, system supply needs to be equal to the load demand continually. The existing synchronous generators are mostly capable to keep the system balance in traditional power system. However, in power systems with wind power penetration, due to random nature of wind energy, keeping electricity supply-demand balancing has been got more difficult. Such systems...
In this paper, an effective doubly fed induction generators' grid side converter control strategy is proposed. This scheme helps in limiting the fault currents as well as in voltage unbalance compensation. In the considered topology three single-phase converters is used instead of one three-phase converters. Voltage is injected in series with the transmission line to limit the fault currents as well...
Among electric vehicles, attentions are especially focused on plug-in electric vehicles of which battery can be charged from grid. Plug-in electric vehicles can cause some problems for power system such as peak load increasing. For reducing these bad effects, vehicle-to-grid (V2G) technology is suggested. V2G describes a system in which plug-in electric vehicles communicate with the power grid to...
Due to the presence of single-phase loads, low voltage microgrids have substantial likelihood of becoming unbalanced. In an unbalanced microgrid fed by a single voltage source converter (VSC), the VSC has to inject a negative current for balancing the load voltage. In a microgrid fed by multiple VSCs, all the VSCs can cooperate in the voltage balancing task. This paper proposes a droop control method...
Due to deterioration of fossil fuel and policy directives on greenhouse gas mitigation, wind power generation has been widely developed in recent years. This has raised many issues in terms of power system operation, dynamics, stability and etc. This paper reviews the effect of different kinds of wind turbines on power system stability. Since there are no existing surveys in this area, it provides...
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.