TY - JOUR
T1 - Load growth and power flow control with DSRs
T2 - Balanced vs unbalanced transmission networks
AU - Omran, Shaimaa
AU - Broadwater, Robert
AU - Hambrick, Joshua
AU - Dilek, Murat
AU - Thomas, Chifong
AU - Kreikebaum, Frank
N1 - Publisher Copyright:
© 2017
PY - 2017/4/1
Y1 - 2017/4/1
N2 - An important issue in today's power system is the need to analyze and determine the adequacy of transmission capacity. There is a need for approaches to increase transmission system capacity without construction of new transmission facilities, all while assuring secure operation of the grid. Distributed Series Reactors (DSRs) are a new smart grid technology that can be applied to control flows in transmission or distribution systems. DSRs can be used to balance phase flows in a single line as well as to control the distribution of flow in a meshed system. This paper investigates DSRs to control power flow to alleviate overloads due to increased power transfer. The IEEE 39 bus standard model is modified to a 3-phase unbalanced transmission model with 345 kV lines that accounts for tower geometry. Using the symmetrical components transformation, a balanced, 3-phase model is then derived from the unbalanced, 3-phase model. DSR designs based on the unbalanced, 3-phase model and the balanced, 3-phase model are compared and used to demonstrate the effectiveness of DSR control in handling load growth. Only unbalanced impedances are addressed i.e., non-transposed lines, but the effects of impedance unbalance are shown to be significant on the resulting DSR design.
AB - An important issue in today's power system is the need to analyze and determine the adequacy of transmission capacity. There is a need for approaches to increase transmission system capacity without construction of new transmission facilities, all while assuring secure operation of the grid. Distributed Series Reactors (DSRs) are a new smart grid technology that can be applied to control flows in transmission or distribution systems. DSRs can be used to balance phase flows in a single line as well as to control the distribution of flow in a meshed system. This paper investigates DSRs to control power flow to alleviate overloads due to increased power transfer. The IEEE 39 bus standard model is modified to a 3-phase unbalanced transmission model with 345 kV lines that accounts for tower geometry. Using the symmetrical components transformation, a balanced, 3-phase model is then derived from the unbalanced, 3-phase model. DSR designs based on the unbalanced, 3-phase model and the balanced, 3-phase model are compared and used to demonstrate the effectiveness of DSR control in handling load growth. Only unbalanced impedances are addressed i.e., non-transposed lines, but the effects of impedance unbalance are shown to be significant on the resulting DSR design.
KW - Balanced/unbalanced transmission systems
KW - Distributed Series Reactor (DSR) design
KW - Electric power transfer
KW - Positive sequence impedance model
KW - Power flow control
UR - http://www.scopus.com/inward/record.url?scp=85009182907&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2017.01.012
DO - 10.1016/j.epsr.2017.01.012
M3 - Article
AN - SCOPUS:85009182907
SN - 0378-7796
VL - 145
SP - 207
EP - 213
JO - Electric Power Systems Research
JF - Electric Power Systems Research
ER -