Energy Management System with Dynamic Threshold Control
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Solution Overview
Problem
Renewable energy sources, such as photovoltaic systems, are unstable due to weather dependence, making power systems unreliable when solely relying on them, while relying on grid power for long periods hinders power-saving mechanisms. An effective energy management system is needed to balance between renewable and grid power sources for stable and efficient energy supply.
Innovation Solution
An energy management system connected between a power supply system and a load, comprising a grid power source, a renewable energy generation module, and an energy storage module, with a power monitoring module, a switch module, a load management module, and an intelligent control module that calculates and adjusts energy thresholds to dynamically switch between power sources based on energy production and load information, ensuring efficient energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If renewable energy generation module is used to supply power, then power-saving mechanism is accomplished, but power supply stability deteriorates due to weather dependence
Solution Approach 1:
An energy storage module is introduced as an intermediary between the renewable energy generation module and the load. The controller charges the energy storage module when renewable energy production exceeds load requirements, and discharges it when production is insufficient, thereby stabilizing power supply while maintaining renewable energy usage for power savings
Solution Approach 2:
The controller dynamically adjusts the state of charge of the energy storage module based on the relationship between renewable energy production and load requirements. By changing the energy storage parameter (charge/discharge state), the system resolves the contradiction between using renewable energy for savings and maintaining supply stability
2Reliability
If grid power source is used to supply power for long time, then power supply stability is maintained, but power-saving mechanism cannot be accomplished
Solution Approach 1:
The system dynamically switches between different power sources based on real-time conditions. The controller continuously monitors renewable energy production and load requirements, adjusting the power supply configuration from purely grid-based to a hybrid of renewable energy and grid power, thereby achieving both stability and energy savings
3Loss of energy
If renewable energy generation module supplies power to load, then power-saving mechanism is accomplished, but energy supply insufficiency occurs when production is below load requirements
Solution Approach 1:
The energy storage module is charged in advance when renewable energy production exceeds load requirements. This preliminary energy storage action ensures that sufficient energy is available when production falls below requirements, preventing energy supply insufficiency while maintaining the power-saving benefits of renewable energy usage
Data Source
AI summary
An energy management method is provided. The energy management method comprises the steps of retrieving load information from at least one load and retrieving energy-supplying information from an energy supply system having a grid power source, a renewable energy generation module and an energy storage module to instantly calculate first and second energy thresholds. When an energy production of the renewable energy generation module is smaller than the second energy threshold, the grid power source or the energy storage module is controlled to supply energy to the load. When the energy production is between the first and the second energy thresholds, the renewable energy generation module is controlled to supply energy to the load. When the energy production is larger than the first energy threshold, the renewable energy generation module is controlled to supply energy to the load and charge the energy storage module.