Variable Energy Power Regulator for Grid Stability
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Solution Overview
Problem
Renewable variable power generation systems, such as solar and wind farms, face challenges in controlling power ramp rates due to their intermittent nature, which can disrupt grid stability, as traditional fossil fuel power plants struggle to quickly adjust to rapid changes in renewable energy output.
Innovation Solution
A variable energy power regulator system that intelligently controls power ramp rates by setting average ramp rates over specific time windows, allowing fast adjustments during sudden drops but slower increases, using a combination of algorithms and modifying functions to predict and manage power output limits, and differentiate between transient and sustained changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If renewable variable power generation systems allow rapid power changes to maximize energy capture, then energy utilization is improved, but grid stability deteriorates due to frequency regulation issues
Solution Approach 1:
The patent applies dynamics by implementing time-varying ramp rate limits that adapt to different operating conditions. The system dynamically adjusts the maximum allowable power change rate based on current grid conditions, renewable resource availability, and forecasted variations, allowing rapid response when needed while maintaining stability during normal operation.
Solution Approach 2:
The system changes the parameter of power ramp rate from a fixed value to a variable parameter that can be adjusted in real-time. By modifying the ramp rate parameter based on environmental forecasts, grid conditions, and operational state, the system optimizes the balance between energy capture and grid stability.
2Reliability
If fossil power plants are used to stabilize grid frequency, then grid stability is improved, but response time deteriorates due to slow ramp-up and ramp-down capabilities
Solution Approach 1:
The patent introduces a control system as an intermediary between renewable power generation and the grid. This intermediary actively manages power output transitions, smoothing rapid changes from renewable sources to prevent frequency instability, thereby reducing the reliance on slow-responding fossil power plants for frequency regulation.
Solution Approach 2:
The system performs preliminary action by forecasting renewable resource variations and pre-adjusting power output ramps. By anticipating future power changes based on weather forecasts and historical patterns, the control system proactively manages ramp rates to prevent grid instability before it occurs, rather than reacting after fossil plants fail to respond quickly enough.
3Productivity
If renewable power output is allowed to vary rapidly with environmental conditions, then energy efficiency is improved, but compatibility with traditional power generation units deteriorates
Solution Approach 1:
The patent makes the ramp rate limits dynamic and adaptive rather than fixed. The system continuously adjusts compatibility parameters based on the operational characteristics of connected traditional power plants, grid conditions, and renewable resource variability, enabling seamless integration across different plant types and operational scenarios.
Data Source
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AI summary
Certain embodiments of the invention may include systems and methods for controlling power ramp rates in renewable variable power generation systems. According to an exemplary embodiment of the invention, a method is provided for limiting power ramp rates. The method can include regulating collective power output of a plurality of variable energy sources (104) by monitoring (102) collective power output of the plurality of variable energy sources (104), predicting collective available power levels (116, 118) of the plurality of variable energy sources (104) based at least in part on ramp rate limits (108, 112), modifying the predicted collective available power levels (116, 118) based at least in part on limiting (204, 310) the rate of change of the of the predicted collective available power levels (116, 118), determining a power regulation setpoint (149), generating a net power command signal (156) based at least in part on the power regulation setpoint (149) or the modified predicted collective available power levels (134), generating a plurality of power control signals (166) based at least in part on the net power command signal (156), and controlling collective power output of the plurality of variable energy sources (104) with the plurality of power control signals (166).