Test Specification 24.01
Interoperability validation and evaluation of the activation chain to satisfy a DSO flexibility request as a response to a voltage disturbance event at a specific grid node.
Test Case 24
Interoperability testing and validation in the activation chain of flexibility-related events in a local distribution network
Identification
| ID | 24 |
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| Project | ERIGrid 2.0 |
| Date | 19/4/2021 |
Test Case Definition
| Name of the Test Case | Interoperability testing and validation in the activation chain of flexibility-related events in a local distribution network | |
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| Narrative | Smart grid interoperability is a main enabling facet of electricity technology developments. It comprises all parts of the smart grid, from generation to transmission and from distribution to consumption. Testing interoperability requires producing detailed test cases describing how smart grid components are intended to interact with each other. A systematic approach for developing smart grid interoperability tests may facilitate the dissemination of innovative solutions, the stability and resilience of the smart grid. The proposed Test Case is conducted following the JRC Smart Grid Interoperability methodology. The methodology is used mainly as a common framework for interoperability testing and consist of five stages; Use Case creation (UC), Basic Application Profile (BAP) creation, Basic Application Interoperability profile (BAIOP) creation, Design of Experiments (DoE), Testing and Analysis of Experiments (AE). Each stage allows the developer to select certain features then used in the subsequent stage. During the completion of all stages, the developer can select relevant standards, their options, test beds with all qualified and test equipment as well their attributes or functions used during the testing. The proposed methodology summarizes a set of best practices the developer could follow to complete in a smooth way a smart grid interoperability test.
Fig.1 A schematic overview of the JRC Interoperability testing methodology In this test case, we will investigate through the interoperability validation tests, the interaction and information exchange between the involved actors for a flexibility activation event. This event will be triggered by a local node voltage disturbance and followed by a consequent flexibility request. To this end, we will analyze voltage restoration level, time and control. | |
| Function(s) under Investigation (FuI) | In this use case, we will analyze the performance of the “voltage restoration” function, after a voltage disturbance occurs in the power grid when different system variables (input factors) are considered and changed. The performance of this function is assessed an interoperability point of view, where different system variables (input factors) potentially affecting the system performance are considered and their effect on the system response is analysed. A reference grid model will be used (JRA1.1?). | |
| Object under Investigation (OuI) | ||
| Domain under Investigation (DuI) |
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| Purpose of Investigation (PoI) | Pol#1: Evaluate the interoperability between the involved actors and the different components in the system (flexibility provider, requester, other intermediates). Validate the interfaces along with specific communication technologies. Pol#2: Assess the restoration time and the level of the restored voltage among the different interface profiles | |
| System under Test (SuT) |
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| Functions under Test (FuT) | In-focus functions: Voltage restore (including restoration time), interoperability testing validation of the selected interfaces, real time simulator for the LV distribution benchmark network Emulated functions: ICT network emulator- communication network emulation, Controlling functions of the systems (e.g., DSO ↔ RTU and RTU ↔ Device) Actuation functions: Flexibility signal (demand response) to manage voltage disturbance event in a system node Observer functions: SCADA monitoring system to detect voltage deviations and instruct the RTU for the activation of the selected flexibility source available in the system | |
| Test criteria (TCR) |
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| Target Metrics (TM) |
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| Variability Attributes (VA) | The admitted voltage deviation, which is the maximum allowed value from which the node voltage, in percentage, can deviate with respect to the reference voltage. This parameter is meant to be a DSO-oriented factor, and the influence of its variability on the system outputs (together with that of the other considered input factors) is studied. | |
| Quality Attributes (QA) |
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Qualification Strategy
Both PoI#1 and PoI#2 are met with Test Specification 24.01. The overall interoperability evaluation for the test will be in the form of a final “pass/fail” form. For PoI#2, the time that the system needs to activate the voltage support mechanism and successfully restore the voltage to acceptable levels will be evaluated. It should be also mentioned that although both PoI can be met by TS 24.01, multiple interfaces (each one corresponding to a different BAIOP) depending on the selected telecommunication technology will be tested for the two communication links under consideration (DSO ↔ RTU and RTU ↔ Device). These will result in multiple experiment specifications.