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.
Direct power control (DPC) is an attractive control method for three-phase pulse-width modulation (PWM) rectifiers, due to the merits of simple structure, quick dynamic response and little tuning work. However, conventional switching table based DPC presents relatively high power ripples and current harmonics, which is especially serious when the grid voltages are unbalanced. Introducing space vector...
The control of PWM rectifiers under unbalanced network has become an important issue in recent years, especially in the applications with weak grid. Conventional methods is based on voltage oriented control (VOC), which requires several PI controllers in dual reference frame and the sequence extraction of grid/rectifier voltages and currents. To reduce the control complexity, recently direct power...
Deadbeat control (DBC) has been known for decades due to its conceptual simplicity and good performance. Recently finite control set model predictive control (FCS-MPC) is emerging as a powerful strategy for control of power converters. Different from DBC, which uses a modulator such as space vector modulation (SVM), FCS-MPC directly obtained the optimal switching states of power converters by minimizing...
Model predictive current control (MPCC) is a powerful control strategy for the control of three-phase power converters. Conventional MPCC achieves good steady state performance and quick dynamic response by selecting the optimal voltage vector. However, this method is highly dependent on the accuracy of the model and parameters, which means that the steady state performance will deteriorate when the...
Microgrid(MG) system black start restoration is an integral part in providing power to traditional grid and stable operation of MG. Aiming at choosing the black start power supply, information entropy theory is used in assessment of distributed generation(DG)'s black start capacity. As the process of pre-synchronous is the key of maintaining steady state in top-down restoration, rapidity and accuracy...
A demodulation system for fiber Bragg grating (FBG) is designed based on distributed feedback (DFB) laser. By use of adjusting the internal temperature, wavelength tunable laser is achieved, and utilizing the laser and PID algorithm to realize the demodulation of FBG sensing signal. The system uses all-fiber structure, with fast response and high precision demodulation. Experimental results show that...
This paper proposes a novel three-phase ac-ac converter topology based on Z-source concept. It could provide buck-boost function and make the role of frequency changer. Compared with the traditional ac-dc-ac converter, it uses fewer devices and realizes direct ac-ac power conversion, so as to have higher efficiency and better circuit characteristics. Compared with the traditional matrix converter,...
At present, the voltage-fed Z-source inverter has widely been investigated, but the current-fed Z-source inverter has not been so well studied in control and modulation strategies. This paper presents a generalized method for establishing an equivalent relationship between modulation patterns being used for voltage-fed Z-source inverter and those possible for current-fed Z-source inverter. This means...
Solar power based on the technology of grid-connected photovoltaic power has become the fastest growing and most widely application in the view of solar energy application. In this paper, the working principle and designing desire of assistant power in grid-connected photovoltaic system was presented, TOPSwitch chips is the core of This assistant power and the design course of main component is given...
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.