Microgrid Power Regulation Using Hybrid Storage and Load Control
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Solution Overview
Problem
Existing power adjustment methods in microgrids face challenges in accurately adjusting power transmission and reception based on planned values while preventing cost increases, particularly due to the slower response speed of power-consuming equipment like hydrogen production units and the need for larger storage batteries.
Innovation Solution
A power adjustment method and device that simultaneously control power consumption in a power consumption unit and charge/discharge power in a power storage unit to align with planned values, utilizing the high response speed of storage units for fine adjustments and the lower response speed of consumption units for rough adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the capacity of the storage battery is increased to improve power adjustment accuracy, then the adjustment precision is improved, but the cost increases
Solution Approach 1:
The patent combines a storage battery and a power consumption unit (hydrogen production equipment) into a hybrid power adjustment system. The storage battery handles high-speed fine adjustments while the power consumption unit provides low-speed rough adjustments, achieving accurate power control without requiring a large-capacity storage battery alone, thus reducing costs while maintaining adjustment precision.
2Quantity of substance
If power adjustment is performed using only hydrogen production equipment, then the cost is reduced, but the response speed is too slow to achieve accurate adjustment
Solution Approach 1:
The patent merges a storage battery (high response speed) with a power consumption unit (low response speed) into a coordinated hybrid system. The control device allocates adjustment tasks based on response characteristics: the storage battery handles rapid fine-tuning while the power consumption unit performs slower rough adjustments, achieving both cost-effectiveness and accurate response.
Solution Approach 2:
The patent implements dynamic task allocation between the storage battery and power consumption unit based on real-time power imbalance conditions. The control device dynamically adjusts which device performs which adjustment task, optimizing the combination of response speeds to achieve accurate power control while minimizing costs.
3Measurement precision
If a large capacity storage battery is used for power adjustment, then the adjustment accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines a storage battery and a power consumption unit into a complementary hybrid system where each device operates within its optimal capacity range. This division of labor reduces the required capacity of the storage battery compared to using it alone, thereby reducing both device complexity and cost while maintaining adjustment accuracy.
Data Source
AI summary
There is provided a power adjustment method in a microgrid connected to an external power supply system and having a power storage unit capable of adjusting an amount of stored power by charging and discharging and a power consumption unit capable of adjusting power consumption of the power. The power adjustment method includes adjusting transmission and reception of the power by simultaneously controlling the power consumption in the power consumption unit and charge/discharge power in the power storage unit in order to transmit and receive power based on a planned value determined for each planned section to and from the external power supply system.