Converter Grid Unit Control Using Selected Measurement Groups
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Solution Overview
Problem
Existing methods for operating converter-based grid units require high computational effort due to the need to consider a large number of measurement values for actuating converters, which can be inefficient and burdensome.
Innovation Solution
A method where a control device selects a subset of measurement values based on a predefined selection guideline, reducing the computational load by focusing on relevant measurement value groups that are time-dependent and consider forecast operating states, external data, and potential deviations, allowing for efficient actuation of converters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all available measurement values are considered for converter actuation, then control precision and reliability are improved, but computational effort and processing time increase significantly
Solution Approach 1:
The patent segments the complete set of measurement values into multiple measurement value groups, where each group contains only the subset of measurement values relevant for specific converter actuation scenarios. This segmentation allows the control device to select appropriate groups based on current operating conditions, thereby reducing computational effort while maintaining control reliability for each specific scenario.
Solution Approach 2:
The patent applies partial action by selecting only the necessary measurement value groups required for specific converter actuation tasks, rather than processing all available measurement values. This partial processing approach reduces computational complexity while sufficient for achieving the control objective in each operating scenario.
2Productivity
If measurement value groups contain fewer than 75% of available measurement values, then computational load is reduced, but risk of insufficient data for accurate control increases
Solution Approach 1:
The patent performs preliminary classification and organization of measurement values into predefined groups based on their relevance to specific converter actuation scenarios. This preliminary action ensures that when a measurement value group is selected, it already contains the appropriate subset of data needed for accurate control decisions, eliminating the need to process unnecessary data while maintaining control accuracy.
Solution Approach 2:
Different measurement value groups are created with different compositions tailored to specific control scenarios and converter configurations. Each group contains measurement values with the appropriate quality and relevance for its intended use, rather than using a uniform set of all measurement values for all scenarios. This local optimization maintains control accuracy while reducing overall computational load.
Data Source
AI summary
A method for operating a converter-based grid unit disposed electrically within an AC voltage section or adjacently to an AC voltage section of an electrical grid and electrically connected to the AC voltage section, includes using a control device to adjust infeed and drawing of active power and/or reactive power into and from the AC voltage section by actuating at least one converter of the converter-based grid unit. A multiplicity of measurement values is transmitted to the control device. The measurement values at least relate to different measurement variables and/or measurement locations within the AC voltage section or the converter-based grid unit. The control device selects a measurement value group from the multiplicity of available measurement values by selecting in accordance with a predefined selection guideline, and the at least one converter is actuated based on measurement values of the selected measurement value group.