Hybrid Power Plant Load Control for Grid Frequency Stabilization
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Solution Overview
Problem
Hybrid power plants face challenges in managing diverse energy sources, requiring flexible and dynamic responses to grid frequency variations and load changes, while optimizing storage use to preserve limited capacity.
Innovation Solution
A hybrid plant with a control device that calculates net load reference values and adjusts programmable energy sources and storage assemblies to balance load variations, ensuring optimal distribution and bidirectional energy management for frequency stabilization and load balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the storage assembly is used to provide multiple services, then the plant flexibility and power capacity are improved, but the storage capacity is limited and its exploitation must be minimized
Solution Approach 1:
The control device dynamically adjusts the distribution of load variations between programmable energy sources and storage assembly based on real-time conditions. The system optimizes when to use storage assembly for frequency stabilization versus when to rely on programmable energy sources, thereby improving plant flexibility while preserving limited storage capacity for critical operations.
2Speed
If the plant responds to transient situations with fast and significant variation of energy production, then the grid frequency stabilization is improved, but the storage assembly exploitation increases
Solution Approach 1:
The control device applies partial action by selectively engaging the storage assembly only for the portion of load variations that cannot be satisfied by programmable energy sources. The system calculates the required load variation and determines the reference integrating load, using storage assembly partially rather than fully, thereby maintaining fast response capability while preserving storage capacity.
3Quantity of substance
If the programmable energy source is used to satisfy the required load variation, then the storage capacity is preserved, but the plant flexibility is reduced
Solution Approach 1:
The control device enables the hybrid plant to perform multiple functions by coordinating both programmable energy sources and storage assembly. The system can operate in different modes: using programmable sources for base load, storage assembly for frequency stabilization, or both together for load balancing, thereby achieving multi-functionality that maintains both storage capacity and plant flexibility.
4Power
If the hybrid plant manages diverse energy sources with different behaviors, then the power capacity is improved, but the management complexity increases
Solution Approach 1:
The control device implements feedback control by continuously monitoring the state of charge of the storage assembly, the output of programmable energy sources, and the grid frequency. Based on this feedback, the control device dynamically adjusts the reference load distribution between different energy sources, thereby managing diverse energy sources with different behaviors in a coordinated manner while maintaining power capacity.
Data Source
AI summary
A hybrid plant for producing electrical energy is configured to be connected to an electrical grid. The hybrid plant includes at least one programmable energy source; at least one energy storage assembly configured to selectively store or release electrical energy; and a control device configured to a control the energy storage assembly to selectively release a calculated reference integrating load when a programmable energy source reference load is lower than a plant net load reference value, or to store the calculated reference integrating load when the programmable energy source reference load is greater than the plant net load reference value.