ONLINE IDENTIFIABILITY OF A SYNCHRONOUS GENERATOR BY LINEARIZED
ON-LINE IDENTIFIABILITY OF A SYNCHRONOUS GENERATOR BY LINEARIZED EQUIVALENT Gorazd Bone, Urban Rudež and Rafael Mihalič
About dynamical equivalents in general • Let there be a dynamic signal measurement.
About dynamical equivalents in general • Let there be a dynamic signal measurement. Dynamical resposne - equivalent 0. 5 0. 4 0. 3 0. 2 0. 1 0 -0. 1 -0. 2 -0. 3 -0. 4 0 0. 5 1 1. 5 2 2. 5 Original signal 3 3. 5 4 4. 5 5
About dynamical equivalents in general • Try to find a dynamical equivalent Dynamical resposne - equivalent 0. 5 0. 4 0. 3 0. 2 0. 1 0 -0. 1 -0. 2 -0. 3 -0. 4 0 0. 5 1 1. 5 2 Original signal 2. 5 3 3. 5 Low quality equivalent 4 4. 5 5
About dynamical equivalents in general • Try to find a dynamical equivalent Dynamical resposne - equivalent 0. 5 0. 4 0. 3 0. 2 0. 1 0 -0. 1 -0. 2 -0. 3 -0. 4 0 0. 5 1 1. 5 Original signal 2 2. 5 3 Low quality equivalent 3. 5 4 Better equivalent 4. 5 5
About dynamical equivalents in general • Quality – how to measure?
About dynamical equivalents in general • Quality – how to measure? Dynamical resposne - equivalent 0. 4 0. 35 0. 3 0. 25 0. 2 0. 15 0. 1 1. 55 1. 65 1. 7 Original signal 1. 75 1. 85 Better equivalent 1. 95 2
About dynamical equivalents in general • Quality – distance between signals Dynamical resposne - equivalent 0. 4 0. 35 0. 3 0. 25 0. 2 0. 15 0. 1 1. 55 1. 65 1. 7 Original signal 1. 75 1. 85 Better equivalent 1. 95 2
About dynamical equivalents in general • Quality – distance between signals
About dynamical equivalents in general •
About dynamical equivalents in general •
Synchronous generator dynamical equivalent
Synchronous generator dynamical equivalent • Measured signal at terminals – obtained active and reactive power dynamics
Synchronous generator dynamical equivalent • Measured signal at terminals – obtained active and reactive power dynamics • Use exhaustive, brute force search
Synchronous generator dynamical equivalent • Measured signal at terminals – obtained active and reactive power dynamics • Use exhaustive, brute force search – Perform simulation, compare the signals, if close, save parameters
Synchronous generator dynamical equivalent • Measured signal at terminals – obtained active and reactive power dynamics • Use exhaustive, brute force search – Perform simulation, compare the signals, if close, save parameters – Decoupled. Some signals not influenced by some parameters
Synchronous generator dynamical equivalent • Measured signal at terminals – obtained active and reactive power dynamics • Use exhaustive, brute force search – Perform simulation, compare the signals, if close, save parameters – Decoupled. Some signals not influenced by some parameters • The results show that different parameter sets may produce the same dynamics
Identifiablity issue – active power for all parameters
Identifiablity issue – reactive power for all parameters
Noticeable difference between physical and simulated (modeling fidelity)
Intrinsic issue with synchronous generator *https: //www. tonex. com/fundamentals-of-synchronous-machines/
Intrinsic issue with synchronous generator *https: //www. tonex. com/fundamentals-of-synchronous-machines/ **Prabhashankar Kundur: „Power System Stability and Control“, Mc. Graw. Hill Inc.
Thank you for your attention Gorazd Bone, Urban Rudež and Rafael Mihalič
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