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.
Smart grids (SGs), which can fully detect and monitor electrical parameters and user behaviours, have become a development trend of power networks. With larger scale and access of new energy, SGs become more vulnerable and unstable. Under this circumstance, unexpected line outages may cause more harm in SGs than in traditional power grids. Thus, accurate and fast localization of line outages is one...
The rapid deployment of Phasor Measurement Units (PMUs) can keep the smart grid in a secure and reliable state. The large amount of data collected from the power grid by PMUs requires new algorithms to detect abnormal and potentially catastrophic events. In this paper, we introduce a novel method to assess the distance to blackout or other instability of the smart grid. Based on the existence of long-range...
In this work, we propose an optimization model for an integrated minimum-cost planning of a wide area measurement system (WAMS) and its underlying heterogeneous communication network. The integer linear program formulation of the proposed planning approach enables not only a simultaneous optimal placement of phasor data concentrators (PDC) and phasor measurement units (PMU) for the observability of...
Applications performing streaming of phasor-measurement data require low latency and losses from the communication network. Traditionally, such requirements are realized through wired infrastructure. Recently, wireless infrastructure has gained attention due to its low-cost and ease of deployment, but its poor quality-of-service is a strong deterrent for use in mission-critical applications. Recent...
In the power grid, Supervisory Control and Data Acquisition (SCADA) systems are used for executing various applications for monitoring and controlling purposes, which in turn enable stable operation of the grid. The integrity and timely delivery of SCADA data is critical to the operation of the grid and this makes them an attractive target for cyber-attacks. However, SCADA systems have various vulnerabilities...
Unlike the traditional optimal PMU placement problems which are assumed that PMUs have unlimited capability of monitoring remote buses via propagation rules, we formulate this problem with considering the depth of observability propagation (DOP) in this paper. Two problem formulations described by mixed integer linear programming (MILP) are proposed. Under this framework, interactions between the...
This paper deals with the optimal phasor measurement unit (PMU) placement problem. In large power system, it is costly to place too many PMUs to achieve real time global observability. In fact, system state can be well estimated by optimally placed limited PMUs' synchronous measurements. Based on the method of voltage control area division, a spectral clustering approach is proposed to divide the...
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.