MARS Submodule Evaluation Using Arm Current and Voltage Emulation
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Solution Overview
Problem
Conventional evaluation platforms for submodule (SM) in Multiport Autonomous Reconfigurable Solar (MARS) power plants, which integrate photovoltaic (PV) and energy storage system (ESS) SMs, are inadequate as they are configured for conventional SMs only and do not account for the unique architectures of PV and ESS SMs, leading to time-consuming and costly full-scale plant testing.
Innovation Solution
A system for characterizing MARS power plants using a test module with amplifier circuitry that emulates arm current and voltage, including current source, filtering, and module-voltage cancellation circuitry, allowing evaluation of PV and ESS SMs separately and efficiently, reducing the need for full-scale testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional evaluation platforms are used for SMs in MMCs, then evaluation can be performed for conventional SMs, but the platform cannot evaluate PV SMs or ESS SMs with different topologies
Solution Approach 1:
The evaluation platform is designed with reconfigurable circuitry that can adapt to evaluate multiple types of SMs (conventional, PV, and ESS) with different topologies. The platform includes configurable voltage sources, current sources, and measurement circuits that can be programmed to match the specific electrical characteristics and topology requirements of each SM type, enabling a single platform to serve multiple evaluation purposes.
Solution Approach 2:
The platform incorporates dynamically reconfigurable elements including programmable power electronic converters and controllable switches that can change the circuit configuration in real-time. This dynamic capability allows the platform to switch between different evaluation modes and adapt to varying SM topologies without requiring physical reconfiguration or multiple dedicated platforms.
2Reliability
If full-scale MARS power plant testing is conducted, then comprehensive performance evaluation is achieved, but the process becomes time-consuming and costly
Solution Approach 1:
The evaluation approach segments the full-scale power plant testing into individual SM-level evaluations. By isolating and testing each SM independently on the modular platform, the system can validate performance, reliability, and interactions without requiring assembly of the entire power plant. This segmentation maintains evaluation comprehensiveness while dramatically reducing testing time and cost.
Solution Approach 2:
The platform creates simplified electrical copies or models of the actual SMs and their operating conditions. Through accurate measurement circuits and simulated load conditions, the platform reproduces the electrical behavior and stress conditions of full-scale operation in a controlled, scaled-down environment, enabling comprehensive evaluation without building the complete power plant.
3Reliability
If full-scale MARS power plant testing is conducted, then complete system validation is achieved, but the cost increases due to the large number of SMs required
Solution Approach 1:
The testing methodology segments the validation process into modular SM-level tests that can be performed independently. This eliminates the need to manufacture and deploy hundreds of actual SMs for testing purposes. Each SM type (conventional, PV, ESS) can be evaluated separately using the same platform, significantly reducing material costs while maintaining validation rigor through systematic testing protocols.
Solution Approach 2:
The platform uses cost-effective, easily replaceable test fixtures and measurement equipment rather than requiring investment in expensive, permanent full-scale test infrastructure. The modular design allows using simpler, more economical components for testing that can be reset and reused across multiple evaluation cycles, reducing both initial and recurring testing costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables cost-effective and efficient evaluation of power electronics modules, facilitating rapid prototyping and design validation of MARS power plants by emulating arm currents and voltages, thus reducing the complexity and cost associated with testing hundreds of SMs.
Implementation Method 1
output, when providing the amplifier current to the test module, an amplifier voltage corresponding to the predetermined voltage values of, and being out of phase with, the module voltage
Data Source
AI summary
A system for evaluating a power electronics module, such as a photovoltaic (PV) module or an energy-storage system (ESS) module, is provided. The power electronics module may form a component of a multiport autonomous reconfigurable solar (MARS) power plant, which may include a plurality of phase-legs each including an upper arm and the lower arm.