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.
Estimation of power-system damping from synchrophasor frequency measurements is studied. Specifically, a procedure for determining the damping of a dominant mode from the turns ratio of the sample autocorrelation function is outlined. The main contribution of the work is to then develop performance bounds on the damping estimates, and demonstrate approximation of these bounds entirely from the measurement...
In this paper we revisit and revise the method of Ma and Thorp [1] for computing all the real-valued solutions to the power flow equations. In a prior work we presented a counterexample to their algorithm [2]. Here we review the general topologically-inspired approach they proposed to trace between solutions assuming one solution is known. We offer a revision to the method by transforming the equations...
This paper introduces locational prices associated with power injection variability. The sensitivity of uncertainty in injected power on system cost is calculated using a probabilistic DC optimal power flow (DC-OPF). This sensitivity may be used as a price for regulation to equitably allocate costs associated with tracking power injections. In this context the price also provides a locational value...
A reduced-order model is used to derive a candidate energy function for a system that includes an infinite bus connected with a single frequency-droop-controlled inverter (a ‘MicroSource’) whose frequency command is actuated according to its low-pass-filtered active power measurement. The analysis of the large-signal stability of such a system is important in understanding the duration that a frequency-droop-controlled...
The Office of Electricity Delivery and Energy Reliability of the U.S. Department of Energy (DOE), the Bonneville Power Administration (BPA), and industry and academic collaborators have leveraged resources to develop a new, cost-effective method for validating power plant models using synchrophasor data.
Power plants contribute substantially to fine particulate pollution which results in hazardous environmental effects. Air quality can be improved by relocation of real power output between power plants. However, this relocation should include spatial, temporal and chemical effects that contribute towards formation of particulate matter. This paper presents a novel air quality constrained optimal power...
With a growing focus on energy and environment, there is need to include emission constraints in electricity markets. Current methods to reduce emissions include the Acid Rain Program, NOx Trading Programs and Cross-State Air Pollution Rule (CSAPR). Even with these cap-and-trade programs in effect, there are substantial Nonattainment Areas in the USA with respect to the National Ambient Air Quality...
We propose a computationally efficient method based on nonlinear optimization to identify critical lines, failure of which can cause severe blackouts. Our method computes criticality measure for all lines at a time, as opposed to detecting a single vulnerability, providing a global view of the system. This information on criticality of lines can be used to identify multiple contingencies by selectively...
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.