Abstract
In order to accurately evaluate the safety risk level of converter station operations and reflect its changing trends, an evaluation method based on dynamic fuzzy theory is proposed. By constructing an initial Work Breakdown Structure-Risk breakdown structure (WBS-RBS) coupled matrix, identifying risk factors, and using the vague set screening method to screen out key risk factors, a comprehensive safety evaluation index system for converter station operations is established. The dynamic fuzzy values of all levels of evaluation indicators are calculated using dynamic fuzzy theory, intuitively reflecting the risk level and its changing trends of all levels of evaluation indicators. Taking the Suzhou ±800 kV converter station project as an example to verify this method, the results show that the safety risk level of this converter station operation is medium–low and tends to be low. This method can objectively reflect the ambiguity and randomness of risk evaluation, improve evaluation accuracy, and intuitively display the risk-changing trends, providing a reference for similar projects.
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