Power Adjustment Control for Renewable P2G Fluctuation Balancing
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Solution Overview
Problem
P2G systems face challenges in immediately responding to and sustaining operations with unstable renewable energy, requiring both immediate responsiveness and sustainability to manage power fluctuations effectively.
Innovation Solution
A power system adjusting device and program that integrates renewable energy generation, power generation, energy storage, and power consumption elements, utilizing command values to asymptotically approach target power, with separate responsiveness for long- and short-period components, ensuring immediate responsiveness and sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a P2G system uses unstable renewable energy directly, then immediate responsiveness to power fluctuations is improved, but system stability and sustainability deteriorate
Solution Approach 1:
The patent segments the power adjustment task into two distinct components: immediate responsiveness handled by the energy storage device, and sustainability handled by the power generation device and demand device. This segmentation allows each component to specialize in one aspect, resolving the contradiction between speed and stability.
Solution Approach 2:
The energy storage device acts as an intermediary between the unstable renewable energy and the P2G system. It absorbs short-period power fluctuations and provides immediate responsiveness, while the command value generation unit coordinates all devices to work together toward sustainable power management.
2Stability of the object's composition
If a P2G system prioritizes sustainability for long-term operation, then system stability is improved, but immediate responsiveness to power fluctuations deteriorates
Solution Approach 1:
The patent divides the power adjustment function into two segments: the energy storage device handles short-period fluctuations for immediate responsiveness, while the power generation device and demand device handle long-period variations for sustainability. This segmentation resolves the contradiction by assigning different time-scale responsibilities to different devices.
Solution Approach 2:
The patent employs periodic action by using the energy storage device to respond to short-period power fluctuations while the main power generation and consumption devices operate sustainably over longer periods. The command value generation unit coordinates these periodic and sustained actions to achieve both immediate responsiveness and long-term stability.
3Adaptability or versatility
If multiple devices are integrated to achieve both responsiveness and sustainability, then system functionality is improved, but device complexity increases
Solution Approach 1:
The command value generation unit serves as a universal control system that manages multiple devices (renewable energy power generation device, power generation device, energy storage device, and demand device). It generates coordinated command values that enable all devices to work together toward common goals of immediate responsiveness and sustainability, reducing the need for separate complex control systems for each device.
Solution Approach 2:
The patent implements feedback mechanisms where the command value generation unit continuously monitors the operational status of all integrated devices and adjusts command values accordingly. This feedback loop enables the system to maintain both responsiveness and sustainability while managing complexity through centralized coordination rather than distributed complex controls.
Data Source
AI summary
An EMS includes a target presentation unit indicating target power, a power acquisition unit that obtains combined power obtained by adding power output from the photovoltaic power generation system, power consumed by the power consumer, power output from the power generation system, power consumed by the hydrogen production system, and power output or consumed by the storage battery system, and a command value generation unit that generates a command value such that the combined power asymptotically approaches the target power. The combined power includes a long- and intermediate-period component and a short-period component. The command value generation unit outputs a command value corresponding to the long- and intermediate-period component to the power generation system or the hydrogen production system. The command value generation unit outputs a command value corresponding to the short-period component to the storage battery system.