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.
Study of catastrophic accidents has shown that severe accidents in power grid have always been occurred by cascading failure. To figure out the possible cascading failure exactly is being more significant. Incorporating the impact of two properties in power grid in terms of the topological structure and the operating state, a multi-factor assessment indicators are now being proposed based on the subdivision...
In recent years, with the continuous expansion of the grid-scale, the system components are becoming more and more complex. Considering that the consequence of instability after power system subjected to large disturbance is very serious, even leads to catastrophic accidents. This paper uses multi-machine power system transient energy function based on the structure preserving models to get potential...
Wind power has the characteristics of stochastic volatility and absorbing reactive power on grid, so it becomes a disturbances source of power grid, and further impact on the vulnerability of the system. This paper took double-fed wind farms as the object, establish the doubly-fed wind turbine wind power system dynamic mathematical model, including wind speed, and model of doubly-fed induction generator...
The component long-term failure and severity indices used in existing methods can not present time-varying characteristics when we assess the catastrophic event occurring in the power grid. A new method is presented in this paper based on uncertain measure. The credibility measure and global fuzzy security index are used to represent the possibility and severity of cascading failures. The N-l contingency...
Regional reactive capability is an important index to evaluate the safety of the power network, since it is related with the economy and reliability of power system. In this paper, a new method based on the static energy function is proposed to evaluate the regional reactive capability. Firstly, the voltage value in base case as well as voltage collapse point is obtained by interior point method;...
Regulated power systems not only were built with excess capacity, but also operated with conservative security limits. But under deregulated environment, the requirement of maintaining security and maximizing the return on existing investments becomes one typical antinomy, resulting in operating the system closer to the traditional deterministic limits or even beyond them by assuming that the contingencies...
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.