Hybrid Power Grid Frequency Feedback for Inverter Load Sharing
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Solution Overview
Problem
In power grids, inefficiencies and potential damage occur when renewable energy sources, such as solar inverters, output more power than needed, leading to imbalances and stress on generators.
Innovation Solution
A system comprising a genset with a controller that adjusts the frequency of electrical power output based on the genset's power output magnitude, and an inverter that adjusts its power output to the grid based on detected frequency, allowing for seamless integration of generators and renewable energy sources without a communications network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If solar inverter supplies power greater than load, then power output from solar inverter is increased, but inefficiencies and damage to generators occur
Solution Approach 1:
The system uses frequency feedback from the genset to control the inverter's power output. The inverter detects the frequency of electrical power from the genset and adjusts its active power output accordingly, creating a closed-loop control system that prevents over-generation and ensures efficient power management.
Solution Approach 2:
The inverter autonomously adjusts its power output based on the detected frequency signal from the genset without requiring external communication or control signals. This self-regulating mechanism allows the inverter to automatically respond to grid conditions and prevent harmful reverse power flow.
2Power
If solar inverter supplies power greater than load, then power output from solar inverter is increased, but fault conditions on generators occur
Solution Approach 1:
The control system takes preliminary action by adjusting the inverter's power output before harmful reverse power flow can occur. By monitoring frequency deviations and preemptively reducing inverter output when the genset operates below optimal levels, the system prevents fault conditions before they develop.
3Measurement precision
If communication network is used for coordination, then power management precision is improved, but system complexity and cost increase
Solution Approach 1:
The system uses electrical frequency as an intermediary signal to transmit control information between the genset and inverter. Instead of requiring complex communication networks, the frequency signal serves as a natural mediator that carries operational status information, enabling coordinated control through simple frequency detection and response.
Data Source
AI summary
Systems and methods for managing power on supplied to a load are provided. In some embodiments, a hybrid power system includes a generator and a power source having an inverter connected to one or more loads. The generator may have a controller that is configured to adjust a parameter (e.g., frequency) of electrical power output via the generator based on a current magnitude of electrical power output of the generator. The inverter is configured to detect the parameter of the electrical power supplied to the load and to adjust a magnitude of current electrical power output based on the detected parameter.