Abb Research Ltd.

Abb Schweiz Ag

Hitachi Energy Ltd

Mani Subramanian

Ernst Scholtz

Mats Larsson

Reynaldo Nuqui

Xiaoming Feng

Vaibhav Deepak Donde

Yan Zhang

John Dennis Finney

John Finney

Will Briggs

Gordon Lin

Vaibhav Donde

Reynaldo F Nuqui

John D Finney

Methods for detecting network model data errors are disclosed. In some examples, methods for detecting network model data errors may include splitting a network model into a first plurality of portions, executing an algorithm on each of the portions, identifying a portion for which the algorithm is determined to be non-converged, splitting the identified portion into a second plurality of portions, repeating the executing, identifying and splitting the identified portion until a resulting identified portion is smaller than a predefined threshold, and examining the resulting identified portion to identify plausible data errors therein. In some examples, examining the resulting identified portion to identify plausible data errors therein may include executing a modified algorithm, which may include an augmented measurement set, on the identified portion.

Detecting state estimation network model data errors

The teachings herein disclose an advantageous method and apparatus for performing Security Constrained Economic Dispatch (SCED) for a hybrid power system that includes one or more AC grids interconnected with one or more multi-terminal High Voltage DC (HVDC) grids. The teachings include optimizing a non-linear objective function, subject to a set of constraints that include AC and DC grid constraints, for determining the SCED solution using successive linear approximation. The linear programming model used in the linear approximations is advantageously augmented with a DC grid portion in a manner that accounts for the effects of the DC grid on the AC grid, but which does not require exposing proprietary DC grid modeling details, and which conforms the resultant SCED solution to all applicable AC and DC grid constraints, including AC grid line flow constraints, AC grid power balance constraints, DC grid line flow constraints, and DC grid power balance constraints.

Method and apparatus for security constrained economic dispatch in hybrid power systems

Phasor measurement units () provide phasor data from various locations () in an electrical power system. The phasor data is referenced to a common timing signal. Non-phasor measurement data is also obtained at various locations in the power system. A phasor assisted state estimator () uses the phasor data and the non-phasor data to determine the power system state.

Estimation of real-time power system quantities using time-synchronized measurements

Growing community of inventors

Sugar Land, TX, United States of America

Mani Subramanian