Test Specification 16.01
Black Start algorithm verification
ID | 16 |
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Author | Evangelos Rikos, Julia Merino, Andres Cortes |
Version | 1.0 |
Project | ERIGrid 2.0-NA4 |
Date | 22/02/2021 |
Name of the Test Case | Testing Black-Start capability using distributed converted interfaced resources | |
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Narrative | The focus of this TC is on MV distribution grid where one central controller can perform the following actions: isolate/disconnect/ reconnect lines and/or resources and initiate grid-forming DGs. The DGs that provide the BS service should have resilience in significant frequency/voltage variations to cope with large imbalances during re-energization and for a typical duration of at least 1 hour. The scope of the TC is to verify the system’s ability to achieve a smooth re-energization within the prescribed duration. | |
Function(s) under Investigation (FuI) |
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Object under Investigation (OuI) |
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Domain under Investigation (DuI) |
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Purpose of Investigation (PoI) |
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System under Test (SuT) | The main components and subsystems that are of interest for this TC are depicted in the above diagram and summarized below:
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Functions under Test (FuT) |
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Test criteria (TCR) |
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Target Metrics (TM) |
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Variability Attributes (VA) | Fully Controllable attributes:
Partly Controllable attributes:
Uncontrollable attributes:
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Quality Attributes (QA) |
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In order to meet the specific PoI, which is the evaluation of the distribution system’s Black Start capability, three separate test specifications are required:
-One test is related to the partitioning of the system. That is how the centralized BS controller manages to disconnect and reconnect components of the grid, either resources (loads, generators) or lines. The test validates the correctness of the disconnection order of components, as well as the ability of the controller to reconnect them at times when voltage and frequency are well within specific boundaries and more or less stable.
-The second test verifies the ability of the system to maintain voltage and frequency within specific boundaries after the BS generator is started up by the BS central controller. The specific operating limits for this test are more relaxed as opposed to the ones that apply in normal operation.
-The third test is a sort of endurance test which validates the BS generator’s ability to provide the service for a minimum time duration (e.g., 1 hour). In other words, this test comes down to verifying the energy reserve of the BS generator.
Black Start algorithm verification
Frequency and Voltage stability response during BS
BS generator energy availability test