Grid Interconnection Testing with Variable AC Grid Simulation
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Solution Overview
Problem
Current grid interconnection testing methods are time-consuming and laborious due to manual processes, leading to potential errors and inconsistencies across different geographic locations with varying grid standards.
Innovation Solution
A computer-implemented method and system using a central controller to automate testing of devices by simulating grid conditions with a variable AC source, transmitting commands to DC-AC inverters, and generating test reports based on responses to simulated waveforms, adhering to various grid interconnection standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual testing processes are used for grid interconnection certification, then flexibility in handling different geographic standards is maintained, but testing becomes time-consuming and laborious
Solution Approach 1:
The system enables rapid switching between different grid interconnection standards (IEEE 1547, VDE-AR-N 4110, AS4777, CEC 263) by changing software parameters and test configurations rather than physical reconfiguration. This allows the same testing apparatus to adapt to various geographic standards while maintaining high productivity through automated execution of standardized test sequences for each standard.
2Reliability
If manual testing and report generation are performed, then human judgment can be applied, but errors and inconsistencies increase due to interpersonal analysis variations
Solution Approach 1:
The system incorporates automated feedback mechanisms where test results are automatically captured, analyzed, and used to generate consistent reports. The automated analysis compares actual device performance against predefined pass/fail criteria for each grid standard, eliminating human judgment variations and ensuring reliable, consistent results across all tests.
Solution Approach 2:
The testing system performs self-analysis of test data and automatically generates certification reports without requiring manual intervention. The system autonomously evaluates device responses, determines compliance status, and produces standardized reports, thereby ensuring consistency while minimizing human intervention.
3Adaptability or versatility
If repetitive tests are performed manually for different geographies, then comprehensive coverage of grid standards is achieved, but time and labor resources are excessively consumed
Solution Approach 1:
The system performs preliminary configuration of test parameters, sequences, and evaluation criteria for each grid standard before actual testing begins. Test scripts and pass/fail thresholds are pre-programmed for IEEE 1547, VDE-AR-N 4110, AS4777, and CEC 263 standards, allowing rapid execution of comprehensive tests without manual setup time for each geography.
Solution Approach 2:
A single universal testing platform is designed to handle multiple grid interconnection standards through software configuration rather than requiring separate dedicated test equipment for each standard. The system can selectively activate appropriate test sequences and evaluation criteria based on the target geography, achieving comprehensive coverage while minimizing time loss.
Data Source
AI summary
Embodiments of the present disclosure provide systems and methods for testing a device for grid interconnection standards. The method includes inputting a set of instructions to a device under test (DUT), where the instructions correspond to a firmware version to be tested by a variable AC source. The method includes transmitting a command signal to an inverter redundant controller (IRC) of the DUT, where the IRC operates at least one DC-AC inverter to attain a grid-tie state in response to receipt of the command signal. The method includes transmitting a set of values corresponding to parameters of the variable AC source configured to simulate an AC grid upon operating at least one DC-AC inverter in the grid-tie state. The method further includes accessing test output data of the DUT from measuring equipment and generating a test report based on responses of the DUT to a set of test waveforms.