Simulated cases for 2021 IEEE-NASPI Oscillation Source Location Contest(Back to the homepage)
Original simulated test cases created in 2016 was based on a WECC 179-bus power system model, which does not cover all possible practical situations of forced oscillations (FOs) such as location of the source in load or in HVDC. Also, interaction of control systems may complicate locating the source of FO and this factor seemed impossible to exhibit by the WECC 179-bus system where simplified classical model is used for all generators. The new set of simulated test cases here cover these gaps. A WECC 240-bus system has detailed modeling of generator including the governor and excitation controls. Random fluctuations (without trend) are added to load model to better mimic actual load behavior. Test cases include also HVDC and load as the source of FO. Additionally, developed library of User Defined Models in TSAT software provide the flexibility to interested users to model a broad range of others FOs beyond the provided 13 test cases.
Below provides the download of the simulation model and data for all 13 cases used by the 2021 IEEE-NASPI Oscillation Source Location Contest conducted between April-June 2021. For each of the 13 cases, we provide:
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(i) A full set of TSAT files, which were used to generate synthetic PMU data.
(ii) A set of synthetic PMU measurements in the form of time-domain simulation results by TSAT software converted into “Test cases library” format. This data set differs from the one used for the OSL contest by not including missed samples and not including post-processing of simulated result to reflect P/M class of PMU.
The solution key can be downloaded here.
More about these 13 contest cases and their design
Below introduces more details about the 13 contest cases and how they were designed. Interested users may learn from it and start designing additional interesting cases for their own research and studies.
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(i) The 13 contest cases share the same power flow steady state but different dynamic data, which were designed by the IEEE-NASPI Oscillation Source Location (OSL) Committee based on the reduced WECC 240-bus case, whose original model, including a .raw format power flow data and a .dyr format dynamic data, was developed and made publicly available by National Renewable Energy Laboratory (download original model). Specifically, the OSL Committee made the following changes:
- changed the power flow dispatch and the network topoloty of the original model, resulting in the power flow data used for all 13 cases.
- added IEEEST PSS model to 10 selected synchronous machines.
- added HVDC dynamic model for PDCI DC line for Case 13.
- modified control settings to produce the desired oscillatory phenomena, including adding periodic forcing signals to load, HVDC control, machine's governor or excitation systems, and modifying the machine's PSS gain. Detailed changes for each of the 13 cases can be found in this solution key.
- added fluctuations (no trend) to MW and Mvar consumptions of loads.
(ii) Each of the 13 cases contains a zip file named "CaseN_TSAT.zip", where N = 1, 2, ... 13. This zip file contains all files required to perform the dynamic simulation in Powertech Labs/TSAT. A description of each file in the zip can be found here: download description, including a description of the UDM template models created by Powertech Labs specifically for this contest to facilitate the implementation of load fluctuations, and FO injections at governor, exciter and load.