Integrated Transmission and Distribution Optimal Power Flow Simulation Using Linear Decision Approach

The existing solutions to the simulations of a transmission network(TN) and distribution network(DN) involve solving each of the networks separately, however with grid modernization DN are becoming active and depending on the penetration level can have a significant effect on TN as a result of reverse power flow from DN interconnected devices. In this paper, an optimal power flow framework was used to solve transmission and distribution systems together using an integrated optimization engine (IOE) with a linear decision rule (LDR) to enable the integrated system to adjust itself when fast changes are occurring in the network due to distributed generation. This enables the architecture to operate optimally and beneficially which improves economic operation and minimizes voltage rise. Our proposed methodology was implemented on an integrated T&D network using the IEEE 9 bus & 13 bus interconnection.