Small Power Plant Energy Storage Control Strategy
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Solution Overview
Problem
There is a conflict between maximizing self-consumption of energy from small power stations and maximizing the lifespan of electrical energy storage batteries, as frequent and intensive use of batteries for energy storage and release accelerates aging, leading to reduced lifespan.
Innovation Solution
An operating method and device that determine system parameters, yield profiles, and user profiles to define an optimal operating strategy for the small power station, which includes controlling the depth of charge cycles, peak load management, and adaptive algorithms to minimize battery aging and extend lifespan while maximizing self-consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequent and intensive use of batteries is implemented to maximize self-consumption of energy, then self-consumption increases, but battery lifespan decreases due to accelerated aging
Solution Approach 1:
The patent implements dynamic adjustment of battery operating parameters including state of charge (SOC) range, depth of discharge (DOD), and charge/discharge rates based on real-time monitoring of battery health state (SOH). The control system adapts the operating strategy to balance self-consumption maximization with lifespan extension by dynamically modifying when and how the battery charges and discharges.
Solution Approach 2:
The patent changes key operating parameters such as SOC range (maintaining between 20-80% instead of full charge-discharge cycles), DOD limits, and charge/discharge current rates. These parameter modifications reduce stress on the battery while still achieving high self-consumption by strategically managing energy storage and release timing.
2Productivity
If deep charge cycles are used to increase energy storage capacity utilization, then self-consumption increases, but battery aging accelerates
Solution Approach 1:
The patent applies partial action by limiting the depth of charge and discharge cycles to 20-80% SOC range instead of utilizing the full battery capacity. This partial utilization strategy reduces battery stress and aging while still capturing sufficient energy to achieve high self-consumption ratios by strategically charging during low-cost periods and discharging during peak demand.
Data Source
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AI summary
The present invention relates to an operating method for an electrical energy store (50) of a small-scale power plant (100) for increasing the operating efficiency of the small-scale power plant (100), having the steps of: providing (S1) at least one system parameter of the small-scale power plant (100); determining (S2) a storage capacity of the electrical energy store (50) of the small-scale power plant (100), an output profile of the small-scale power plant (100) and a user profile of a user of the small-scale power plant (100) by means of a sensor device (20); defining (S3) an operating strategy for the small-scale power plant (100) on the basis of the determined storage capacity, the output profile of the small-scale power plant (100), the user profile and the at least one system parameter of the small-scale power plant (100) by means of a control device (10), wherein the operating efficiency is increased by increasing a service life of the electrical energy store (50) and/or maximizing in-house consumption of electrical energy produced using the small-scale power plant (100); and controlling (S4) the small-scale power plant using the defined operating strategy by means of the control device (10) in order to increase the operating efficiency of the small-scale power plant (100).