POI Electrical Parameter Control Using Correlated Feedback Signals
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Solution Overview
Problem
Modern renewable power generation systems face challenges in efficiently regulating multiple power generating subsystems due to low-fidelity electrical parameter data from points of interconnection (POI), which can lead to inefficient operation and increased costs from communicative links between subsystems.
Innovation Solution
A method and system where a subsystem controller receives low-fidelity feedback signals from a POI and high-fidelity signals from the power generating subsystems, generates a correlation value by filtering their difference, and uses this to create a modified setpoint value for controlling power generation, allowing for efficient regulation without requiring direct communication between subsystems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct measurement of electrical parameters at POI is implemented, then measurement precision is improved, but device complexity and installation permission requirements increase
Solution Approach 1:
The patent uses an intermediary approach by receiving electrical parameter data from the POI operator instead of installing direct sensors. The subsystem controller acts as an intermediary that processes available data (setpoint values and feedback signals) to achieve effective regulation without requiring physical sensor installation at the POI, thus avoiding permission issues and installation complexity.
Solution Approach 2:
The system enables self-service regulation by using locally available high-fidelity data from the power generating subsystem combined with low-fidelity feedback from the POI. The subsystem controller independently processes this combined information to generate setpoint commands, eliminating the need for external sensor installation and direct POI measurement infrastructure.
2Loss of information
If communicative links are established between power generating subsystems, then information sharing for POI parameter determination is improved, but device complexity and security risks increase
Solution Approach 1:
The patent segments the information architecture by allowing each power generating subsystem to independently process its own high-fidelity local data combined with low-fidelity POI feedback. Each subsystem operates autonomously without requiring communication links to other subsystems, dividing the overall control function into independent, non-communicating units that maintain security while achieving effective regulation.
Solution Approach 2:
Each power generating subsystem performs self-service regulation by independently determining its own setpoint commands using its local high-fidelity electrical parameter data and the shared low-fidelity POI feedback signal. This eliminates the need for inter-subsystem communication links and coordination, reducing device complexity and security risks while maintaining effective control.
3Measurement precision
If high-fidelity data collection from all subsystems is implemented, then measurement precision is improved, but loss of time and communication overhead increase
Solution Approach 1:
The patent applies partial action by using only the necessary amount of high-fidelity data from each subsystem's local measurements rather than requiring complete data from all subsystems. Each subsystem uses its own local high-fidelity data combined with low-fidelity POI feedback, achieving sufficient measurement precision without the time-consuming coordination required to collect data from all subsystems.
Solution Approach 2:
Each subsystem independently performs measurements and data processing using its own local high-fidelity sensors and the shared low-fidelity POI feedback. This self-service approach eliminates communication overhead and data collection delays associated with centralized data gathering, as each subsystem autonomously determines its setpoint commands without waiting for information from other subsystems.
Data Source
AI summary
A system and method are provided for controlling a power generating system having a power generating subsystem connected to a point of interconnection (POI). A first and a second data signal are obtained corresponding to a feedback signal of an electrical parameter regulated at the POI, the second data signal having a signal fidelity that is higher than that of the first data signal. A correlation value between the first and second data signals is obtained by filtering a value difference between the first and second data signals and is applied to a setpoint value for the electrical parameter regulated at the POI. The modified setpoint value and the second data signal are combined to generate a setpoint command for the power generating subsystem that is used for controlling generation of power at the power generating subsystem to regulate the electrical parameter at the POI.