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

US9705336B2 · kind B2 · utility

Assignee

• ABB RESEARCH LTD. · CH

Inventors

• Xiaoming Feng · Cary, US
• Will Briggs · Sugar Land, US
• Mani M. Subramanian · Chennai, IN
• Ernst Scholtz · Houston, US

Key dates

• Filing date: Nov 14, 2013
• Grant date: Jul 11, 2017
• Expiry date: Oct 29, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02J2203/20
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

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.