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An immediate need in the transmission system is to find alternative solutionsthat improve system operation and defer the need for new transmission lines.This study comprehensively evaluates the performance and economic benefits ofshort-term operation of using battery energy storage systems (BESS) as virtualtransmission (VT) to promote power transfer across distant regions.Specifically, this work implements various day-ahead energy scheduling modelsto analyze the impact of VT on system operation cost, network congestion, modelcomputational time, and market performance. The performance of VT is comparedwith three alternative network congestion mitigation methods, includingbuilding new high-voltage physical transmission lines, cost-driven batteryenergy storage systems, and network reconfiguration, as well as combinations oftwo of the aforementioned methods. The benchmark dayahead scheduling model is atraditional security-constrained unit commitment model without system upgradesor other network congestion mitigation. Numerical simulations conducted on theIEEE 24-bus system demonstrate that VT provides a 14% operational costreduction and 34% congested line relief compared to the base case. Compared toother examined schemes, VT is the only one comparable to physical transmissionlines that can provide satisfying congestion relief and operation costreduction without significantly sacrificing computing time and load payment.

Evaluation of Battery Energy Storage System to Provide Virtual Transmission Service