TY - GEN
T1 - Nodal admittance matrix based area partition method for small-signal stability analysis of large-scale power electronics based power systems
AU - Qiao, Liang
AU - Xue, Yaosuo
AU - Kong, Le
AU - Wang, Fred
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/6/14
Y1 - 2021/6/14
N2 - In power electronics-based power systems (PEPSs), small-signal stability is an important factor for system design and operation, where the impedance-based approach is often used. However, unlike small-scale PEPSs with simple and straightforward impedance models, it would take much more efforts to derive the large-scale PEPSs impedance model, which is very complicated and sometimes may get wrong results due to the elimination of right-half plane (RHP) poles during the impedance aggregation process. To simplify the derivation procedure and analyze the small-signal stability of large-scale PEPSs, this paper proposes a nodal admittance matrix (NAM) based area partition method. In this method, the large-scale PEPS is divided into several sub-areas, and the stability is analyzed within the sub-area first, and then the interconnection stability among these sub-areas is analyzed. The proposed method is scalable and can help to locate the weakest areas/converters that may cause instability in the whole system. In this paper, the concept of the proposed method and its application to an example system are introduced. Experimental results are also given to validate the effectiveness of the proposed method.
AB - In power electronics-based power systems (PEPSs), small-signal stability is an important factor for system design and operation, where the impedance-based approach is often used. However, unlike small-scale PEPSs with simple and straightforward impedance models, it would take much more efforts to derive the large-scale PEPSs impedance model, which is very complicated and sometimes may get wrong results due to the elimination of right-half plane (RHP) poles during the impedance aggregation process. To simplify the derivation procedure and analyze the small-signal stability of large-scale PEPSs, this paper proposes a nodal admittance matrix (NAM) based area partition method. In this method, the large-scale PEPS is divided into several sub-areas, and the stability is analyzed within the sub-area first, and then the interconnection stability among these sub-areas is analyzed. The proposed method is scalable and can help to locate the weakest areas/converters that may cause instability in the whole system. In this paper, the concept of the proposed method and its application to an example system are introduced. Experimental results are also given to validate the effectiveness of the proposed method.
KW - Area partition
KW - Large-scale
KW - Nodal admittance matrix
KW - Power electronics-based power systems
KW - Small-signal stability
UR - http://www.scopus.com/inward/record.url?scp=85115707943&partnerID=8YFLogxK
U2 - 10.1109/APEC42165.2021.9487354
DO - 10.1109/APEC42165.2021.9487354
M3 - Conference contribution
AN - SCOPUS:85115707943
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 687
EP - 693
BT - 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Y2 - 14 June 2021 through 17 June 2021
ER -