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 DC microgrid, it is common that constant power loads (CPLs) exhibit negative impedance characteristics, which degrades the stability margin of the whole system. This paper focuses on the stability problem of isolated DC microgrid with multiple DC voltage control units and constant power loads. Taking controllers into account, the detailed impedance model of DC microgrid is established, and it shows...
In distribution network, with the installed of photovoltaic (PV), bought many problems. One of the most concerned problems is the overvoltage in the terminal bus of distribution network. It is caused by the reverse power flow which brought out by the increase of the PV sources penetration. In this paper, an improved PQ-Q (V) control strategy is proposed to alleviate such problem. The economic performance...
This paper presents a neural adaptive controller for a class of nonlinear system in the presence of input saturation and arbitrary unknown information by integrating the design framework of neural networks (NNs) with the dynamic surface control (DSC) and backstepping technique. NNs are directly used to deal with unknown nonlinear terms. By introducing a well-defined smooth function and a Nussbaum...
In this paper, we discuss how to synthesize a stabilizably robust controller for a ball and plate system (BPS). In order to reduce the fragility in its robust controller synthesis, a loop-shaping method in terms of a normalized right coprime factor (NRCF) uncertainty description for the BPS is thus employed. In effect, the design of weighting functions for the BPS loop-shaping is a decisive factor...
A significant amount of renewable energy based power is being integrated at the distribution or sub-transmission level worldwide, known as Distributed Generation (DG). And the Doubly-Fed Induction Generator (DFIG) based wind turbine is one of the utmost important branches of DG development. However, the DFIGs suffer from high sensitivity from system disturbance that they cannot keep connection with...
The applications of dynamic content updates for a group of users, for example weather report and traffic congestion broadcast, have been shown to benefit significantly from Delay Tolerant Networks (DTN) communication mechanisms such as opportunistic contact and user sharing. In this paper, we study the dynamic content updates over energy-constrained DTN, and focus on its asymptotic properties about...
High elasticity asphalt sand which also is stress absorbed layer as intermediate layer was put between the deck and the asphalt concrete, slow down stress difference between asphalt concrete and deck through superior deformation coordination ability, could reduced the shearing force, reduced to the bonding power request, thus reduced deck pavement destruction. Asphalt sand and composite structure...
At present, several algorithms on load balancing adopt diffusion schemes, but the diffusion schemes are not well adapt to the hierarchical interconnection networks because these networks usually have high order Laplace matrix such that computing its spectrum becomes complicated. Biswapped network is a hierarchical network which is built of 2n copies of an n-node basis network, and its basic network...
This paper presents a linear matrix inequality (LMI) method for the design of the wide-area time-delay damping (WATDD) controller of static synchronous series compensator (SSSC)-type flexible ac transmission system (FACTS) device to enhance the power stability of the interconnected power systems. Firstly, in order to reveal the single-input multi-output (SIMO) characteristic of the open-loop power...
This paper adopts a GZ-I module and based on the module constructed an ldquoHrdquo-shaped four-legged robot. Inspired from the way of animals, in this paper the locomotion is generated and controlled by a central pattern generator (CPG), and so that the robot movement is digitally controlled. The four-legged robot has the pose and locomotion of standing, crawling, turning, and lateral crawling. Furthermore,...
Path compression techniques are efficient on-demand routing optimizing techniques for mobile ad hoc networks. But the existing path compression techniques have some shortages such as blindfold compression and unstable path. It is necessary to achieve the effective tradeoff of compression efficiency and path stability. This paper calculated the dynamic, real-time stable compression period probabilistically...
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.