Affiliation of Author(s):[1]School of Mechanical,and Electrical Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China;[2]Department of Electrical Engineering,Tsinghua University,Beijing,100084,China

Journal:中国电机工程学会电力与能源系统学报(英文)

Key Words:Affine policy;multistage robust optimization;unit commitment

Abstract:Multistage robust unit commitment(MRUC)is an important decision-making problem in power system operations.The affine policy facilitates problem-solving,but it compromises flexibility.This letter proposes a partially affine policy for MRU C problem with fast-ramping units;this policy imposes affine relations to coupling variables only and leaves the remaining variables to be optimized in the real-time dispatch.As a result,the real-time flexibility of fast-ramping units is retained.By adopting this approach,MRU C with a partially affine policy becomes a special two-stage adaptive robust optimization problem.Numerical tests verify that the proposed partially affine policy significantly reduces the conservativeness compared with affine policy,improving the dispatch economy and flexibility.

Volume:11

Issue:1

Page Number:477-480

ISSN No.:2096-0042

Translation or Not:no

CN No.:10-1328/TM