Modeling Interregional Transmission Congestion in the NationalEnergy Modeling System

Gumerman, Etan ; Chan, Peter ; Lesieutre, Bernard ; Marnay, Chris ; Wang, Juan

Lawrence Berkeley National Laboratory

关键词: Capacity;    01 Coal, Lignite, And Peat;    Simulation Transmission Congestion National Energy Modeling System Loadflow;    Coal;    32 Energy Conservation, Consumption, And Utilization;   

DOI  :  10.2172/885251
RP-ID  :  LBNL--59076
RP-ID  :  DE-AC02-05CH11231
RP-ID  :  885251

美国|英语

来源: UNT Digital Library

【 摘 要 】

Congestion analysis using National Energy Modeling National Energy Modeling System (NEMS) or NEMS-derivatives, such as LBNL-NEMS, is subject to significant caveats because the generation logic inherent in NEMS limits the extent to which interregional transmission can be utilized and intraregional transmission is not represented at all. The EMM is designed primarily to represent national energy markets therefore regional effects may be simplified in ways that make congestion analysis harder. Two ways in particular come to mind. First, NEMS underutilizes the capability of the traditional electric grid as it builds the dedicated and detached grid. Second, it also undervalues the costs of congestion by allowing more transmission than it should, due to its use of a transportation model rather than a transmission model. In order to evaluate benefits of reduced congestion using LBNL-NEMS, Berkeley Lab identified three possible solutions: (1) implement true simultaneous power flow, (2) always build new plants within EMM regions even to serve remote load, and (3) the dedicated and detached grid should be part of the known grid. Based on these findings, Berkeley Lab recommends the following next steps: (1) Change the build logic that always places new capacity where it is needed and allow the transmission grid to be expanded dynamically. (2) The dedicated and detached grid should be combined with the traditional grid. (3) Remove the bias towards gas fired combine cycle and coal generation, which are the only types of generation currently allowed out of region. (4) A power flow layer should be embedded in LBNL-NEMS to appropriately model and limit transmission.