Energy Management System for Independent Power Grid Stability
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Solution Overview
Problem
Independent energy systems face challenges in maintaining continuous power supply due to uncertainties in natural energy generation and limited capacity of storage battery systems, leading to potential power outages and increased risk of load non-powering, especially in isolated locations where skilled personnel may not be readily available.
Innovation Solution
An energy management system that connects natural energy generating apparatuses, storage battery systems, and power generators to maintain demand-supply balance by controlling load connections and operations, ensuring continuous power to critical loads through integrated control of circuit breakers and operation modes, with the storage battery system acting as a regulated power supply and power generators operating in constant power mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If natural energy generating apparatuses are installed in the independent system to supply power, then the power supply capacity is improved, but the power supply stability deteriorates due to uncertain and fluctuating generation output
Solution Approach 1:
The patent combines multiple power sources (natural energy generating apparatuses, storage battery system, and power generator) into a unified power supply system. The energy management system integrates these diverse sources to work together, where natural energy provides base power, storage batteries smooth fluctuations, and power generators provide backup, thereby maintaining both high power capacity and stable supply.
Solution Approach 2:
The storage battery system acts as an intermediary between the uncertain natural energy generation and the stable power demand. It absorbs excess power when generation exceeds demand and releases power when generation falls short, mediating the fluctuations and stabilizing the overall power supply to critical loads.
2Use of energy by moving object
If power supply to accessory machines of storage battery system is stopped to conserve power, then energy consumption is reduced, but the storage battery system suffers failure or deterioration
Solution Approach 1:
Instead of completely stopping power supply to accessory machines, the system provides partial power supply sufficient to maintain basic functionality and prevent failure. The energy management system calculates the minimum required power to keep the storage battery system operational and prioritizes this supply, ensuring reliability while minimizing energy consumption during scarce conditions.
3Loss of energy
If power supply is stopped to conserve limited natural energy and storage battery capacity, then energy preservation is improved, but the power supply system cannot be resumed without skilled personnel arrival
Solution Approach 1:
The system maintains power supply to critical loads and control systems even during energy scarcity, ensuring that the power supply system remains in a state ready for quick restoration. By preventing complete shutdown and maintaining minimal operational status, the system avoids the need for complex restart procedures that would require skilled personnel, enabling autonomous or rapid restoration.
4Device complexity
If only one or two power generators are installed in the independent system, then device complexity is reduced, but the power supply reliability deteriorates when natural energy and storage battery capacity are scarce
Solution Approach 1:
The energy management system creates a multi-functional power supply architecture where each component serves multiple purposes. The power generators not only provide primary power but also act as backup and support for storage battery charging. This universal approach allows a smaller number of generators to fulfill multiple roles, maintaining reliability without increasing device complexity proportionally.
Data Source
AI summary
When in the independent system: a natural energy generating apparatus, a storage battery system, a power generator, and a first load is connected to a power supply system; the natural energy generating apparatus supplies generated power to the power supply system; the storage battery system is a regulated power supply; and the power generator performs a constant power operation, information indicating states of the natural energy generating apparatus, the storage battery system, the power generator, the first load, and a second load is obtained. Operations of the natural energy generating apparatus and the power generator, connection of the second load to the power supply system, and paralleling off the second load from the power supply system are controlled based on the information so that a demand-supply balance of power in the independent system is maintained, with the first load maintained to be connected to the power supply system.