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Grid Code Load Flow is used to determine a renewable power plant's reactive power capability at the Point of Measurement (POM) under normal operating conditions. In just one Grid Code Load Flow calculation, hundreds of Load Flow scenarios are run at different voltage setpoints by incrementally adjusting the MW and MVAR output from each renewable source (a process also known as 'sweeping'). All results are then compiled to obtain the total output at the POM. Upon completion, Grid Code Load Flow generates a comprehensive report including compliance details, alerts, and all of the power plant assets input data. The report includes a visualization of the power plant P-Q and V-PF capability against grid interconnection requirements including an intuitive representation of any discrepancies and compliance validation.
Dedicated Module: Fully integrated with ETAP Digital Twin modeling with unique capabilities for renewable power plant reactive power capability studies.
Adaptive Capability Sweeping: Grid Code Load Flow performs hundreds of load flow studies in batches, also known as 'Sweeping'. Based on power plant settings and user defined sweeping data, Grid Code Load Flow runs P-Q sweeping and V-PF sweeping in batches. This adaptive sweeping approach reduces simulation time while maintaining accuracy.
Comprehensive Reporting: The study result provides a detailed and visual report in excel format using the project data, study settings, and the device and grid capability rules that were used in the Grid Code Load Flow study.
Equipment Rulebook: Choose predefined equipment from the ETAP Capability and Control rulebook , or directly enter assets’ reactive power capability curve.
Grid Code Rulebook: Select a predefined grid code from the ETAP Capability and Control rulebook to validate if the power plant capability meets code requirements for your region. ETAP is continuously adding new rulebook data to cover more regions. Alternatively, custom rulebooks can be added following this format:
Complex Standards and Codes: Uncertainties that the study will accurately consider all the relevant standards and codes
Grid Code Load Flow ensures the consideration for grid interconnection requirements for renewable power plants and systems, including but not limited to these performance requirements:
Time-consuming Manual Processes: Inefficient use of time researching standards running numerous load flow scenarios and compiling the results.
Grid Code Load Flow ensures compliance with grid interconnection requirements and saves significant time by addressing various operating limitations and producing multiple studies in just one operation.
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Learn how ETAP Grid Code improves grid interconnection studies and compliance checks. This presentation provides a walkthrough of ETAP’s advanced modeling capabilities and study modules which alleviate the challenges of manual processes, including integration of rulebooks with load flow, short circuit, protective device coordination, transient stability and harmonic analysis. Interconnection studies are vital for the power sector's shift to sustainable energy, ensuring the safe, secure, and efficient operation of connected power plants. By streamlining compliance checks and ensuring that grid code requirements are met, the time-saving solution offered by ETAP offers a much-needed comprehensive solution for grid interconnection studies.
It is crucial to define the reactive power limits to evaluate the voltage support available under normal, abnormal and emergency operations with the unit's safe functioning. Published generator thermal capabilities curves, produced by the manufacturer, define the limits for safe operation based on the generator design's thermal limitations. Practically, the available reactive capability differs from the published equipment curves due to plant specific design and operating constraints. This presentation discusses a theoretical approach utilizing a simplified electrical distribution system and an ETAP model to identify and validate the plant-specific unit capability.
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