TY - JOUR
T1 - On Accurate and Compact Model of High DER-Penetrated Sub-Transmission/Primary Distribution Systems in ISO Energy Market
AU - Liu, Yikui
AU - Wu, Lei
AU - Chen, Yonghong
AU - Li, Jie
AU - Yang, Yafei
N1 - Publisher Copyright:
© 2010-2012 IEEE.
PY - 2021/4
Y1 - 2021/4
N2 - In Independent System Operator's (ISO) energy market clearing process, sub-transmission/primary distribution systems are usually modeled as simplified fixed or flexible loads. This simplification, however, may not be proper for emerging distribution systems with an increasing penetration of distributed energy resources (DER). As a matter of fact, scheduling results from the simplified model could induce power flow violations of distribution lines, while also misrepresenting contributions of DERs on economic operations of the entire grid. To this end, this paper proposes a multi-port power exchange model and associated bidding strategies, in order to accurately and compactly formulate the contribution of highly DER-penetrated sub-transmission/distribution systems in the ISO energy market while resolving computational complexity. The proposed models can effectively capture physical and economic impacts of sub-transmission/distribution systems in the ISO market clearing, while respecting their internal physical limits. Numerical studies show that, with proper settings, the proposed approach can accurately reflect impacts of DER-penetrated distribution networks on market clearing results and power flows, while presenting high computational performance.
AB - In Independent System Operator's (ISO) energy market clearing process, sub-transmission/primary distribution systems are usually modeled as simplified fixed or flexible loads. This simplification, however, may not be proper for emerging distribution systems with an increasing penetration of distributed energy resources (DER). As a matter of fact, scheduling results from the simplified model could induce power flow violations of distribution lines, while also misrepresenting contributions of DERs on economic operations of the entire grid. To this end, this paper proposes a multi-port power exchange model and associated bidding strategies, in order to accurately and compactly formulate the contribution of highly DER-penetrated sub-transmission/distribution systems in the ISO energy market while resolving computational complexity. The proposed models can effectively capture physical and economic impacts of sub-transmission/distribution systems in the ISO market clearing, while respecting their internal physical limits. Numerical studies show that, with proper settings, the proposed approach can accurately reflect impacts of DER-penetrated distribution networks on market clearing results and power flows, while presenting high computational performance.
KW - Distributed energy resources (DER)
KW - distribution system integration
KW - energy market
KW - unit commitment
UR - http://www.scopus.com/inward/record.url?scp=85103387272&partnerID=8YFLogxK
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U2 - 10.1109/TSTE.2020.3020873
DO - 10.1109/TSTE.2020.3020873
M3 - Article
AN - SCOPUS:85103387272
SN - 1949-3029
VL - 12
SP - 810
EP - 820
JO - IEEE Transactions on Sustainable Energy
JF - IEEE Transactions on Sustainable Energy
IS - 2
M1 - 9184136
ER -