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.
Emergency islanding control is the last line of defense to avoid power system collapse, and it plays an important role in the prevention of large scale blackout. This paper carries out the study of slow coherency based adaptive controlled islanding aiming to design an islanding control scheme applicable to AC/DC interconnected power systems. Firstly, a slow coherency based islanding method is proposed...
An inductive power transfer (IPT) system usually consists of four parts: an AC-DC power factor correction (PFC) converter, a high frequency DC-AC inverter, a compensation network comprising a loosely coupled transformer (LCT) and the resonant capacitors, and a rectification output circuit. Due to the relative large air gap, the magnetic coupling coefficient of the IPT system is poor, different from...
In this paper, the AC impedance analysis is used to explore the optimal discharging frequency for a Li-ion battery. Experiments indicate that the optimal discharging frequency is at the minimum AC impedance frequency fZmin for a conventional pulse current (PC) discharging This PC discharging strategy improves the discharging time, the discharging efficiency, and the minimum rising temperature of the...
In this paper, a cascaded multilevel inverter with selective harmonic elimination and battery-balanced discharge function (CMI-SHE & BBD) is proposed. The input of each level of cascaded multilevel inverter circuit is directly connected to a battery. Duty cycle of switch of each level is controlled to contain the ac output voltage with minimize total harmonic distortion. Additionally, the battery-balanced...
In this paper, taking precision cotton planting system as an example, from the three technology links of the precision agriculture cultivation management information system, including agricultural acquisition system information, information processing system, and implementation of the system to start, combine with the technology ideas, methods and means adopted by the precision cotton cultivation...
With the popularization of e-commerce in recent years, customer relationship management (CRM) has gained much attention. Many companies have initiated projects to improve on customer orientation and plan the implementation of CRM systems. Among the desired benefits are increased customer satisfaction and retention by providing personalized products and value added services. With the aid of data warehouse,...
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.