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.
The general criterium adopted by the Brazilian System Operator for the calculation of the Transfer Capability is (n-1). However, the Brazilian Grid Code establishes that multiple simultaneous outages should be considered as a single contingency when statistics demonstrate that they are likely to occur, with important consequences to the bulk power system, in the following cases: · When circuits share...
An electrical power system is typically operated at least cost given some technical and reliability constraints. To that end, many utilities use deterministic methods such as n-1 criterion in order to ensure reliability. This method though being used worldwide and for a really long time can be expensive as contingencies occur rarely. In order to evaluate power systems, it must be noted that contingencies...
This paper presents the application of fuzzy clustering technique on large load data to greatly reduce calculations in reliability evaluation of restructured power systems. The method involves: first grouping a large load data into few clusters, secondly calculating partial membership value of each load point in each cluster, thirdly calculating reliability indices for each cluster and finally, expressing...
Expanding the extra high voltage transmission system and improving the transfer capability of the network are the primary tasks of the power network. With the increasing expansion transmission system scale, the super large scale network has taken shape. According to the definition of available transfer capability by North America Electric Reliability Council (NERC), we know that ATC not only depends...
Eddy current proximity probes are used extensively for monitoring shaft vibration of large motors and generators, especially those manufactured to American Petroleum Institute specifications [1] [2]. It is important to minimize proximity probe track runout, which is also known as slow roll runout, so as to minimize the measurement error when monitoring and diagnosing vibration. Customer specifications...
Root-cause diagnostics of generator service failures has become a major problem in the industry, particularly during the last 20 years. Generator maintenance specialists from OEMs and independent generator repair companies are trained to be proficient in a specific assignment - repairing of generators. Typically these specialists do not have the technical background to perform diagnosis of the root...
This paper presents software with graphical user interfaces, developed to make economic studies and a reliability analyse about power supply for remote base transceiver station. These works deal with remote supply like solar panels, wind turbines, fuel cells, microturbines and diesel motors. The main thematic is to compare two solutions witch are supply these telecommunication stations with the electric...
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.