Abstract: Technologies for controlling forced oscillations in electrical power grids include a processing unit and a phasor measurement unit and a control device coupled to a power grid. The processing unit receives a measurement indicative of active power in the power grid from the phasor measurement unit and determines a frequency of a forced oscillation active in the power grid based on the measurement. The processing unit injects a corrective signal with the control device into the power grid. The processing unit determines a corrective phase and a corrective amplitude in response to injecting the corrective signal. The processing unit continues to inject the corrective signal with the corrective phase and the corrective amplitude. The control device may be a static VAR compensator, a synchronous generator, a static synchronous compensator, a synchronous condenser, an electric storage device, or a solar power plant. Other embodiments are described and claimed.

Abstract: Technologies for controlling forced oscillations in electrical power grids include a processing unit and a phasor measurement unit and a control device coupled to a power grid. The processing unit receives a measurement indicative of active power in the power grid from the phasor measurement unit and determines a frequency of a forced oscillation active in the power grid based on the measurement. The processing unit injects a corrective signal with the control device into the power grid. The processing unit determines a corrective phase and a corrective amplitude in response to injecting the corrective signal. The processing unit continues to inject the corrective signal with the corrective phase and the corrective amplitude. The control device may be a static VAR compensator, a synchronous generator, a static synchronous compensator, a synchronous condenser, an electric storage device, or a solar power plant. Other embodiments are described and claimed.

Abstract: Electrical circuit control techniques in power systems are disclosed herein. In one embodiment, a supervisory computer in the power system can be configured to fit phasor measurement data from phasor measurement units into a Gaussian distribution with a corresponding Gaussian confidence level. When the Gaussian confidence level of the fitted Gaussian distribution is above a Gaussian confidence threshold, the supervisory computer can be configured to perform an ambient analysis on the received phasor measurement data to determine an operating characteristic of the power system. The supervisory computer can then automatically applying at least one electrical circuit control action to the power system in response to the determined operating characteristic.

Abstract: Electrical circuit control techniques in power systems are disclosed herein. In one embodiment, a supervisory computer in the power system can be configured to fit phasor measurement data from phasor measurement units into a Gaussian distribution with a corresponding Gaussian confidence level. When the Gaussian confidence level of the fitted Gaussian distribution is above a Gaussian confidence threshold, the supervisory computer can be configured to perform an ambient analysis on the received phasor measurement data to determine an operating characteristic of the power system. The supervisory computer can then automatically applying at least one electrical circuit control action to the power system in response to the determined operating characteristic.

Abstract: A plurality of measurement signals may be evaluated to detect a poorly damped oscillation mode in an electric power delivery system. An oscillation mode of interest may be detected, and the oscillation mode of interest may be analyzed using a frequency transform. A plurality of amplitudes of the oscillation mode of interest in each measurement signal may be determined using a sliding window. The plurality of amplitudes may be used to calculate a damping of the oscillation mode of interest. The damping may be calculated solving a linearized system of equations. The linearized system of equations may be a least square estimate of the damping based on the logarithm of each amplitude. If the damping indicates that the oscillation mode of interest is poorly damped, a control action may be taken.

Abstract: A plurality of measurement signals may be evaluated to detect a poorly damped oscillation mode in an electric power delivery system. An oscillation mode of interest may be detected, and the oscillation mode of interest may be analyzed using a frequency transform. A plurality of amplitudes of the oscillation mode of interest in each measurement signal may be determined using a sliding window. The plurality of amplitudes may be used to calculate a damping of the oscillation mode of interest. The damping may be calculated solving a linearized system of equations. The linearized system of equations may be a least square estimate of the damping based on the logarithm of each amplitude. If the damping indicates that the oscillation mode of interest is poorly damped, a control action may be taken.

Abstract: Systems and methods for global voltage security assessment in power systems are disclosed herein. In one embodiment, a method for assessing voltage security in a power system having a number (i) of buses includes capturing a change in bus voltage and a change in line reactive power for at least some of the buses in the power system, for each of the i number of buses, calculating a voltage assessment index) (?i) for as follows: ? i = ? j ? ? ? ? Q ij ? ? ? V i where ?Vi is the change in bus voltage and ?Qij is the change in line reactive power from a connection j over a predetermined period of time. The method further includes assessing a current voltage security status of the power system based on the calculated voltage assessment index (?i).

Abstract: Provided is a method and device for assessing and monitoring voltage security in a power system. More specifically, a method and device for assessing and monitoring the value of reactive power load when changes in reactive power outputs of at least some of the generators in the electrical power system cause all of the generators in the system to reach the combined operating limit of their reactive power output. In response thereto, the method and device are further adapted to initiate suitable control measures such as switching of transformer banks and/or capacitor/reactor banks, as well as shedding loads whenever necessary to mitigate an impending voltage stability problem.

Abstract: Systems and methods for global voltage security assessment in power systems are disclosed herein. In one embodiment, a method for assessing voltage security in a power system having a number (i) of buses includes capturing a change in bus voltage and a change in line reactive power for at least some of the buses in the power system, for each of the i number of buses, calculating a voltage assessment index) (?i) for as follows: ? i = ? j ? ? ? ? Q ij ? ? ? V i where ?Vi is the change in bus voltage and ?Qij is the change in line reactive power from a connection j over a predetermined period of time. The method further includes assessing a current voltage security status of the power system based on the calculated voltage assessment index (?i).

Abstract: Systems and methods for electromechanical oscillation monitoring are disclosed herein. In one embodiment, a method for monitoring electromechanical oscillation in a power system includes forming a power density spectrum in frequency domain based on phasor measurements collected from a plurality of locations in the power system and identifying an oscillation in the power density spectrum. The oscillation has a power density larger than other oscillations. The method also includes analyzing the identified oscillation in time domain to determine a damping characteristic of the identified oscillation and indicating that an insufficiently damped oscillation exists in the power system if the determined damping characteristic of the oscillation meets a predetermined condition.

Abstract: Systems and methods for electromechanical oscillation monitoring are disclosed herein. In one embodiment, a method for monitoring electromechanical oscillation in a power system includes forming a power density spectrum in frequency domain based on phasor measurements collected from a plurality of locations in the power system and identifying an oscillation in the power density spectrum. The oscillation has a power density larger than other oscillations. The method also includes analyzing the identified oscillation in time domain to determine a damping characteristic of the identified oscillation and indicating that an insufficiently damped oscillation exists in the power system if the determined damping characteristic of the oscillation meets a predetermined condition.

Abstract: Provided is a method and device for assessing and monitoring voltage security in a power system. More specifically, a method and device for assessing and monitoring the value of reactive power load when changes in reactive power outputs of at least some of the generators in the electrical power system cause all of the generators in the system to reach the combined operating limit of their reactive power output. In response thereto, the method and device are further adapted to initiate suitable control measures such as switching of transformer banks and/or capacitor/reactor banks, as well as shedding loads whenever necessary to mitigate an impending voltage stability problem.