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.
In order to solve the voltage over-limit problem of distributed photovoltaic(PV) connected to string lines, it is feasible to fully utilize the reactive power regulation ability of PV systems to adjust the line's voltage. In this paper, based on analyzing the mechanism of the point of interconnection(POI) of PV systems voltage over-limit and the voltage sensitivity of low-voltage string lines, a reactive...
Most of the existing unbalanced control strategies only focus on a single control objective, which makes it difficult for three-phase grid-connected inverters to operate at an optimal performance according to the demand. This paper has analyzed the amplitude and phase relations between the positive- and negative-sequence output current under different control objectives, and then proposes a simplified...
An improved aggregated model of the wind farm is proposed in this paper to reduce the active and reactive power error caused by wind farm equivalence. The simulation experiments are done while the wind farm is represented by the detailed model, the improved aggregated model and the common used aggregated model respectively using Matlab/Simulink. The results show that the improved aggregated model...
Due to the unreasonable reactive power configuration for wind power base, disconnection of large-scale wind turbines from grid has caused several times in the world recently. Based on the brief analysis of the process of the accident in wind power base, risk is introduced to make reactive power configuration for wind power base in this paper, considering the cost of investment of reactive power compensation,...
The most rapid development often stems from a exact schedule plan, the schedule problems of each project should be found answers from the schedule realizable. In a actual project management, schedule estimating and establishing are difficulties for a long time, these difficulties not only for we do not have historical data and also for we do not have realizable and easy estimating methods. Therefore...
The paper analyses the disadvantage of conventional input voltage space vector strategy based on direct power control (DPC) of three-phase boost type PWM rectifiers, and proposes a new scheme which dividing the input voltage space into nonzero twelve space vectors with a new switching table. Simulation results in different load verify that the scheme can more availably decrease the control error of...
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.