Abstract: Systems and methods for detecting cyber attacks of subsystems include an interface of the subsystem that provides power exchange. A processor may be configured to calculate an interaction variable from a function of one or more internal states of the subsystem. A comparator circuit is coupled to receive the output signal and the interaction variable, to determine a difference between at least one characteristic of the power signal and at least one characteristic of the interaction variable. A cyber-attack identification module is configured to identify the presence of a cyber-attack targeting the system based on the difference between the at least one characteristic of the power signal and the at least one characteristic of the interaction variable.

Abstract: Disclosed herein is a fundamental modeling and control method in dynamic energy conversion and transfers in complex energy systems with multiple energy sources, fuel and electric. The multi-layered modeling enables efficient and stable operation through optimized coordination of engines and electric part of a hybrid turbo-electric distribution system (TeDP). A provable coordination of power and rate of change of power interactions between the components is done at the higher-system level. Advanced nonlinear control of components is disclosed to ensure that components meet power/rate of change of power commands given by the higher level. This method is used to demonstrate, for the first time, how rotor stall and surge instabilities in engines can be eliminated by controlling the electric generators and/or storage.

Abstract: Disclosed herein are methods and systems for modeling and controlling the disparate components (e.g. generators, storage, propulsors, and power electronics) that comprise an aircraft turbo-electric distributed power (TeDP) system. The resulting control system is hierarchical and interactive. Layer one is the physical electric power system. Layer three is an optimization system that determines set points for system operation. Layer two, in between layer one and layer three, includes nonlinear, fast, dynamic power-electronic controllers that hold the operation of the power system to the desired set points. Communication between these layers ensures feasibility and stability of the controlled operation. Simulations demonstrate that the resulting control system ensures stability and maximum efficiency.

Abstract: Described are concepts, systems and methods for operating microgrid systems both during normal operation conditions and during sudden, unexpected occurrences of a fault which results in a source becoming disconnected from a primary supply. This is achieved through control systems and method based upon multi-layered modeling of system controllable components and their interactions. This approach results in controllable components capable of operation in a “plug-and-play” manner.

Abstract: Autonomous, self-adjusting, and distributed line flow processing for a network having nodes with branches coupling adjacent ones of the nodes and components coupled to the nodes. Systems, methods, and software made in accordance with this disclosure can be used to identify where power flows can exceed the maximum transfer limit in each line and to enable automated adjustments in order to avoid such conditions. These can be useful tools for both system operators of large electrical networks and for implementing automated schemes to ensure network feasibility in micro-grids or other networks with many smart components embedded with communications and/or computation capabilities.

Abstract: Described are concepts, systems and methods for operating microgrid systems both during normal operation conditions and during sudden, unexpected occurrences of a fault which results in a source becoming disconnected from a primary supply. This is achieved through control systems and method based upon multi-layered modeling of system controllable components and their interactions. This approach results in controllable components capable of operation in a “plug-and-play” manner.

Abstract: A new approach in contingency analysis is presented based on a modular method for power flow calculation. The proposed method exploits reuse of power flow data for modules not affected by an outage. The method minimizes the number of necessary computations and matrix inversions in contingency analysis; this is achieved by recalculating only the modules affected by the change and reusing data from the original system for all other modules.

Abstract: Autonomous, self-adjusting, and distributed line flow processing for a network having nodes with branches coupling adjacent ones of the nodes and components coupled to the nodes. Systems, methods, and software made in accordance with this disclosure can be used to identify where power flows can exceed the maximum transfer limit in each line and to enable automated adjustments in order to avoid such conditions. These can be useful tools for both system operators of large electrical networks and for implementing automated schemes to ensure network feasibility in micro-grids or other networks with many smart components embedded with communications and/or computation capabilities.

Abstract: A system for monitoring a power transmission line includes at least one monitoring device located along the power transmission line configured to provide power transmission line data. A wide area situational awareness module is configured to receive the power transmission line data and an adaptation module is configured to receive output from the wide area situational awareness module and further configured to calculate control actions for the power transmission line based on the power transmission line data.

Abstract: A new approach in contingency analysis is presented based on a modular method for power flow calculation. The proposed method exploits reuse of power flow data for modules not affected by an outage. The method minimizes the number of necessary computations and matrix inversions in contingency analysis; this is achieved by recalculating only the modules affected by the change and reusing data from the original system for all other modules.

Abstract: A system for monitoring a power transmission line includes at least one monitoring device located along the power transmission line configured to provide power transmission line data. A wide area situational awareness module is configured to receive the power transmission line data and an adaptation module is configured to receive output from the wide area situational awareness module and further configured to calculate control actions for the power transmission line based on the power transmission line data.

Abstract: A method and apparatus for directly controlling the net power flow on tie lines between different areas of a large electric power system, which provides automatic dynamic control to maintain the stability of the system. Utilizing a sensitivity matrix and simple measurements of real power output from each of the generators in a given area, it is possible to dynamically control the entire system in a way which accounts for loading changes in any area. The control can be implemented using a Flexible AC Transmission Systems (FACTS) technology controller which utilizes the measurements and sensitivity matrix from a given area to determine a derived net power flow from the first area to the remainder of the system, and for comparing the derived net power flow to a set point to provide an error signal which approaches zero as the controller adjusts, for example, a phase angle difference across the tie line to adjust the net power flow thereon.