Ground Fault Test Validation Using Simulation Conformance Checks
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Solution Overview
Problem
Current methods for validating full-scale distribution network single phase-to-ground fault tests lack objective criteria, leading to non-reproducible results and inadequate conformance validation.
Innovation Solution
A computerized simulation validating method and system that obtains recorded waveforms and external characteristic parameters from field testing, processes them to determine internal quantities, and compares these with simulation testing results to ensure reproducibility and conformance, using a simulation model that includes an equivalent power source, grounding transformer, and fault trigger control module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an all-round comparison without distinguishing quantities is adopted for validation, then the validation process is simple, but the validation effectiveness is poor
Solution Approach 1:
The patent segments the validation process by categorizing quantities into three distinct dimensions: steady-state quantities, transient quantities, and unconventional quantities. Each dimension contains specific measurable parameters (e.g., zero-sequence current, harmonic current, negative-sequence current) that are evaluated separately, transforming a vague all-round comparison into a structured multi-dimensional assessment that improves validation effectiveness while maintaining operational clarity
Solution Approach 2:
The patent introduces a multi-dimensional evaluation framework by adding the dimension of quantity categorization. Instead of performing a single-dimensional comparison, the validation process now operates across three distinct quantity dimensions, each with its own set of parameters and evaluation criteria, thereby enhancing measurement precision without significantly increasing operational complexity
2Adaptability or versatility
If a subjective validation approach is used to validate reproducibility by manually comparing waveform files, then the validation process is flexible, but the validation criteria are non-uniform
Solution Approach 1:
The patent transforms the validation process from subjective waveform visual comparison to objective parameter-based evaluation by identifying and measuring specific electrical quantities across three dimensions. This parameter change enables uniform, repeatable validation criteria while maintaining the flexibility to handle different fault scenarios and testing conditions through the comprehensive quantity categorization framework
Solution Approach 2:
The patent replaces the manual, subjective mechanical process of waveform visual inspection with an automated, objective computational system that calculates and compares specific electrical quantities. This substitution eliminates human subjectivity and ensures uniform validation criteria while preserving adaptability through the flexible three-dimensional quantity framework that can accommodate various testing scenarios
3Reliability
If field testing is performed to verify ground fault management technologies, then the test results are practically relevant, but the conformance validation is inadequate
Solution Approach 1:
The patent establishes a feedback mechanism where field testing results are systematically compared against simulation results across three quantity dimensions. This feedback loop enables conformance validation by identifying discrepancies between actual field performance and simulated behavior, thereby improving both the practical relevance verification and the accuracy of conformance assessment through iterative comparison and analysis
Solution Approach 2:
The patent employs preliminary simulation testing to establish expected behavior patterns and quantity relationships before conducting field tests. By pre-defining the three-dimensional quantity framework and simulation criteria, the system prepares uniform validation standards in advance, enabling accurate conformance validation of field test results while maintaining their practical relevance to real-world ground fault scenarios
Data Source
AI summary
A computerized simulation validating method for a full-scale distribution network single phase-to-ground fault test is implemented by simulating a full-scale test system with external quantities being controlled to be conformant and validating the full-scale distribution network single phase-to-ground fault test based on a conformance check result between the internal quantities of the field testing and the internal quantities of the simulation testing. The simulation validating method for a full-scale distribution network single phase-to-ground fault test improves normalization and conformance of the full-scale distribution network ground fault test. The computerized simulation validating system, apparatus, and medium for a full-scale distribution network single phase-to-ground fault test also achieve the benefits noted above.